KR20050026883A - Particulate filtering device and diesel engine vehicle with the same - Google Patents

Abstract

A particulate material removal device and a diesel vehicle with the particulate material removal device are provided to easily regenerate a filter, meshes of which are choked up, at low cost. A particulate material removal device(1) comprises an outer pipe(4) having openings to an inlet side and an outlet side of gas(3), and a filter(5) received in the outer pipe to capture particulate materials in inflow gas and to burn and remove the particulate materials. The outer pipe is assembled to a passage(2) of gas, and the filter constitutes an inner pipe(8). A gap between the inner pipe and the outer pipe functions as an emergency bypass passage(K) of gas when the inner pressure of the inner pipe is suddenly increased. A safety valve, making gas flow to the emergency bypass passage when the inner pressure of the inner pipe is suddenly increased, is formed to the inner pipe.

Description

Particle removal apparatus and diesel car provided with this {PARTICULATE FILTERING DEVICE AND DIESEL ENGINE VEHICLE WITH THE SAME}

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing particulates, and in particular, to trap particulates contained in exhaust of an internal combustion engine such as a diesel engine used in diesel cars, generators, farm equipment, etc., in a heater or a filter, or to burn off the captured particulates. A fine particle removal device suitable for use and a diesel vehicle having the removal device.

Background technology

Conventionally, the regulation on automobile exhaust gas mainly targets nitrogen oxides (NOx) etc. which mainly make nitrogen dioxide which becomes a carcinogenic substance.

By the way, a large amount of carbon microparticles | fine-particles (so-called graphite) exist in the exhaust gas of a diesel vehicle, and this carbon microparticles float in air for a long time after being discharged into the air via an exhaust passage, and finally, soot. It is back and floats down to the floor, road surface, or clothing. However, since carbon adsorbs substances well, various chemical substances such as carcinogens are adsorbed to the carbon fine particles suspended in the air, and the carbon particles enter the human body by inhaling the carbon fine particles. Reports that cause disease have recently come out.

As a result, it is no longer limited to nitrogen oxides (NOx), but regulation of the emission of particulate matter (PM) from diesel cars has become an important problem. Therefore, a graphite collecting device is provided in which an graphite removal filter made of metal fibers, honeycomb elements, or the like is provided in an exhaust passage of a vehicle-mounted diesel engine to protect environmental air from diesel graphite contamination (for example, a patent). See Document 1 and Patent Document 2).

However, in this kind of graphite removal filter, when used for a long time, there is a drawback that clogging occurs due to the collected graphite and the pressure loss increases.

As a means of eliminating the clogging of graphite, a diesel particle removal device is proposed which burns trapped particles to regenerate a filter function (see, for example, Patent Documents 3, 4, 5).

An apparatus of this kind includes a tubular container having an inlet and an outlet of exhaust gas, a heater provided at an inlet side in the tubular container, a porous foam filter disposed adjacent to the rear end of the heater, and a rear end of the porous foam filter. It is comprised with the catalyst carrying filter arrange | positioned adjacent to.

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 trapped 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 to ignite and burn the unburned particles trapped by the porous foam filter. In the catalyst carrying filter on the downstream side, since the heat of conduction from the heater and the exhaust gas decreases, the temperature decreases, but since the burning of the trapped particles is accelerated by the catalyst supported on the catalyst carrying filter, the fire burns. Without this, many trapped particles are burned off at a relatively low temperature, and the filter function is regenerated.

[Patent Document 1]

Room 61-55114

[Patent Document 2]

Bulletin 61-84851

[Patent Document 3]

Japanese Patent Application Laid-Open No. 2-173310

[Patent Document 4]

Japanese Patent Laid-Open No. 6-212954

[Patent Document 5]

Japanese Patent Application Laid-Open No. 8-193509

However, a configuration in which a heater having a built-in device has a filter regeneration function is ideal, but it is complicated and expensive, and has a disadvantage of lack of durability.

On the other hand, even in a filter in which clogging has not yet occurred, when the exhaust gas containing a large amount of oxygen together with graphite suddenly flows into the diesel particle removing device, so-called unburned particles are exploded in the diesel particle removing device. A phenomenon called oxygen flash is caused, and the filter or the like may be damaged.

For example, when an accelerator is stepped after using an exhaust brake that blocks exhaust and brakes on a long downhill, the exhaust gas containing high concentration (for example, four times the normal) oxygen together with diesel particulates is diesel. The rapid inflow into the particle removal device causes the combustion of diesel particulates explosively and reaches about 1500 ° C., so that for example, a metal filter may be blown off.

The present invention has been made in view of the above-described circumstances, and a first object of the present invention is to provide a diesel vehicle having a particulate removal device and a diesel vehicle having a removal device capable of regenerating the clogged filter easily and at low cost. have.

In addition, it is possible to prevent the explosive combustion of the fine particles in the gas by any cause, for example, even if the explosive combustion occurs, the fine particle removal device and the removal device that can prevent damage to the device resulting therefrom It is a 2nd object to provide the diesel vehicle with which it is provided.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the invention of Claim 1 is assembled on the gas flow path, and has the exterior which has an opening in the inflow side and the outflow side of the said gas, and is mounted in the exterior, A particulate-removing device comprising a filter for trapping or capturing and burning and removing particulates in the gas, wherein the filter constitutes an inner tube, and a gap between the inner tube and the outer tube is a pressure in the inner tube. It is characterized by consisting of the structure which functions as an emergency bypass flow path of the said gas at this time of rapid increase.

The invention according to claim 2 relates to the microparticle removal device according to claim 1, wherein the inner pipe is provided with a safety valve for flowing the exhaust gas in an emergency bypass passage when the pressure in the inner pipe rapidly increases. It is characterized by that.

Moreover, the invention of Claim 3 is related with the microparticle removal apparatus of Claim 1, The side surface of the said external side is provided with the opening-and-closing opening part with the cover for attaching or detaching the said filter. .

The invention as set forth in claim 4, which is assembled on a gas flow path and has an opening on the inflow side and the outflow side of the gas, and traps or traps the particulates in the gas that are stored and mounted in the exterior. A fine particle removal device comprising a plurality of filters for combustion removal, wherein the plurality of filters are connected to each other according to the flow of the gas, and are 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 sealing structure is comprised. It is characterized by the above-mentioned.

Moreover, the invention of Claim 5 is related with the microparticle removal apparatus of Claim 4, Comprising: The said filter arrange | positioned at the most upstream side between the said some filter mutually, and between the said inlet port, and the most downstream side, A gasket is inserted between the arranged filter and the outlet pipe, so that an inner tube of a sealed structure is formed.

Moreover, the invention of Claim 6 is related with the microparticle removal apparatus of Claim 4, The said inner pipe | tube is characterized by the addition of the joint pipe | tube with a gasket for connecting said several filter.

Moreover, the invention of Claim 7 is related with the microparticle removal apparatus of Claim 4, Comprising: The opening-and-closing opening part with a cover for attaching or detaching said each filter is provided in the external side surface. have.

The invention according to claim 8 relates to the microparticle removal device according to claim 7, wherein, when assembling the inner tube, the lid part of the detachable opening is opened, and the respective filters are inserted from the detachable opening. While disassembling the inner tube, detachment means for extracting the respective filters from the opening and closing portion is provided.

Moreover, the invention of Claim 9 is related with the microparticle removal apparatus of Claim 8, Comprising: The said detachable means has single or multiple long bolt, It is characterized by the above-mentioned.

Moreover, the invention of Claim 10 is related with the microparticle removal apparatus of Claim 8, Comprising: The said detachable means has single or multiple long bolt and double nut, It is characterized by the above-mentioned.

The invention according to claim 11 relates to the fine particle removing device according to claim 4, wherein the inner tube is fixed to the outer surface and thermally expanded in an axial gap between the inner tube on the outflow side or the inflow side and the outer surface. The leaf | plate spring member for absorbing this is provided, It is characterized by the above-mentioned.

Moreover, the invention of Claim 12 is related with the fine particle removal apparatus of Claim 4, When assembling the said inner pipe | tube, the cover part of the said opening-and-closing opening part is opened, and each said filter is inserted from the said opening-and-closing opening part, While assembling the inner tube, when disassembling the inner tube, a detachment means having a single or a plurality of long bolts is provided for taking out the respective filters from the detachable opening portion, and an inflow side end surface or an outflow side of the appearance is provided. The long bolt of the attachment / detachment means is inserted into the end face, and a leaf spring member for absorbing thermal expansion is provided in the axial gap between the inner tube on the outflow side or the inflow side and the outer surface. When fastened, the leaf spring member is deformed by compression, characterized in that the inner tube is configured to be fixed to the external appearance The.

The invention according to claim 13 relates to the fine particle removing device according to claim 12, wherein the leaf spring member comprises a plate spring having an opening portion through which the inlet pipe or the outlet pipe is inserted. Doing.

The invention according to claim 14 relates to the microparticle removal device according to claim 12, wherein the gap between the inner tube and the outer tube is an emergency bypass flow path of the exhaust gas when the pressure in the inner tube suddenly increases. It is characterized by consisting of a function to function as.

The invention according to claim 15 relates to the fine particle removing device according to claim 14, wherein the inner pipe is provided with a safety valve for flowing the exhaust gas in an emergency bypass passage when the pressure in the inner pipe rapidly increases. It is characterized by that.

The invention according to claim 16 relates to the fine particle removing device according to claim 4, wherein a clogging sensor for informing clogging of the filter is added.

The invention according to claim 17 relates to the particle removal device according to claim 1, which is assembled on a discharge path of a diesel engine and has an opening on the inflow side and the outflow side of the diesel exhaust gas, and the appearance. And a filter for accommodating or trapping and trapping particulates in the diesel exhaust gas.

The invention according to claim 18 relates to the fine particle removing device according to claim 4, which is assembled on a discharge path of a diesel engine and has an opening on the inflow side and the outflow side of the diesel exhaust gas, and the appearance. And a plurality of filters for accommodating or trapping particulates in the diesel exhaust gas for combustion elimination.

Moreover, the invention of Claim 19 relates to a diesel vehicle, It is characterized by including the said microparticle removal apparatus of Claim 17. It is characterized by the above-mentioned.

The invention according to claim 20 relates to a diesel vehicle, and is characterized by comprising the above-described fine particle removing device according to claim 18.

Best Mode for Carrying Out the Invention

The purpose of regenerating the filter which has been clogged at a low cost and easily is to have a double pipe structure with the outer tube and the inner tube constituted by the filter and the like, and a detachable opening with a lid for attaching and detaching the filter as the inner tube is provided in the outer shell. It was realized by provision. In the filter taken out from the external appearance, unburned particles are burned and regenerated in a regeneration furnace.

Example 1

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings. A description is concretely made using an Example.

1: is a schematic cross section which shows schematic structure of the diesel particulate removal apparatus which is one Example of this invention.

The diesel particulate removal device 1 of this example is mounted in a diesel car, and is connected to the discharge path 2 of the diesel engine 1, as shown in FIG. 1, and the inflow side and the outflow side of the diesel exhaust gas 3 are discharged. A plurality of filter units (two in this example) for housing 4 having an opening on the side and housing and mounting in the exterior 4 to trap or trap particulates in the diesel exhaust gas 3 for combustion. (5, 5), the plurality of filter units (5, 5) are connected to each other in accordance with the flow of the diesel exhaust gas (3), and the diesel exhaust gas (3) In combination with the inlet pipe 6 and the outlet pipe 7, the inner tube 8 of the sealing structure is formed except for the inlet side and the outlet side, and has a double tube structure as a whole.

FIG. 2 is an exploded view showing the internal structure of the diesel particulate removal device 1 in an exploded manner.

As shown in the figure, a joint pipe having a gasket for joining the two cylindrical PM (particulate material) filter units 5 and 5 and the filter units 5 and 5 at the front and rear ends thereof. (9), the inlet pipe 6, and the outlet pipe 7 are fastened and fixed by the detachable means 12 which has a bolt nut structure, and the inner pipe 8 of an airtight structure is comprised. The front cover portion 8B of the inner tube 8 is welded to the inlet pipe 6, and the rear cover portion 8C of the inner tube 8 is welded to the outlet pipe 7. . Between the filter unit 5 arrange | positioned upstream and the front cover part 8B (inlet pipe 6), and between the filter unit 5 and the back cover part 8C arrange | positioned downstream (outlet pipe ( Also in 7)), an annular gasket (not shown) is inserted to secure a sealing structure. In these gaskets, both surfaces of the annular metal plate are covered with carbon particles.

Each filter unit 5 has a roll-shaped filter portion 5B and a cross-shaped filter support which are housed in common with the short inner cylinder 5A and the inner cylinder 5A. 5C is roughly comprised by the blade 5D of 3 pieces structure or 4 pieces structure provided along the axial center, respectively. The wing | blade 5D of a 3 piece structure or 4 piece structure is a cross-sectional annular band gap between the outer peripheral surface of the inner tube 8, and the inner peripheral surface of the exterior 4, as mentioned later. It contributes to securing the bypass Euro in case of emergency.

In addition to the inlet pipe 6, the front cover portion 8B is provided with a disc spring support 20 and a bypass valve (safety valve) 15 as described later.

The external appearance 4 is a double-sided opening, and is roughly comprised by the long outer cylinder part 4A, the front cover part 4B, and the disk shaped back cover part 4C, The inner cover part 4B has an inner tube An opening through which the inlet pipe 6 of (8) is inserted is provided. The rear lid portion 4C is provided with an opening through which the outlet port 7 of the inner tube 8 is inserted. In addition, on the circumferential side surface of the external appearance 4, as shown in FIG. 3 and FIG. 4, the opening-and-closing opening 11 with the side cover 10 for attaching or detaching each said filter unit 5 etc. is provided. It is prepared.

4 C of said back cover parts are provided with the detachable means 12 which attaches and detaches the inner tube 8 and the exterior 13 which accommodates the said inner tube 8 freely. As shown in FIG. 4, FIG. 5, and FIG. 6, this attachment / detachment means 12 has the long bolt 13A, 13A, ... and the nut (preferably a double nut) of single or plural (plural in this example). (13B, 13B, ...). On the side circumferential surface of the outlet pipe 7 of the inner tube 8, 13C of force support plates for receiving the pressing force of the said long bolt 13A, 13A, ... are fitted and welded.

In 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. 6, a plate spring 14 made of a leaf spring member for firmly pushing and fixing the inner tube 8 to the outer surface 4 through the plate spring bearing 20 to absorb thermal expansion. ) Is provided. In the center portion of the disc spring 14, an opening for inserting the inlet pipe 6 of the inner tube 4 is provided.

In the configuration of this example, when the diesel engine is operated, for some reason, when the pressure of the exhaust gas 3 of the inner tube 8 rapidly increases, between the outer circumferential surface of the inner tube 8 and the inner circumferential surface of the outer appearance 4. The cross-sectional annular gap has a configuration that acts as an emergency bypass flow path K for avoiding explosive combustion such as oxygen flash, for example (FIGS. 1 and 6). For this reason, the inner pipe 8 is provided with a bypass valve (safety valve) 15 through which the exhaust gas flows in the emergency bypass flow path K when the pressure in the inner pipe 8 rapidly increases (FIG. 1). .

In the bypass valve 15, normally, the valve plate is blocking the valve by the spring force of the compression coil spring. However, when the exhaust pressure in the inner tube 8 exceeds the predetermined threshold pressure in the abnormality, the inner tube 8 The valve plate is retracted by the exhaust pressure inside, and the valve opening is opened. From there, the exhaust gas in the inner tube 8 is formed in a cross-sectional annular band between the outer circumferential surface of the inner tube 8 and the inner circumferential surface of the outer appearance 4. It flows into the gap (by-pass flow path K in case of emergency) and is discharged out of the pipe.

In addition to the bolt insertion hole, an emergency discharge port is drilled in the rear lid portion 4C of the exterior 4 and serves as an outlet of the discharge gas 3 via the emergency bypass flow path K. Moreover, for safety, the pressure sensor (clogging sensor) 16 which informs the clogging of the filter units 5 and 5 is provided in the upstream and downstream, and the temperature sensor is also provided in the center part of the apparatus. On the upstream side of the front filter unit 5, the impingement plate in order to slow down the diesel exhaust gas 3 introduced at high speed from the inlet pipe 6 and to disperse it evenly into the filter unit 5. (17) is provided.

Next, the filter part 5B which is a core part of the filter unit 5 is demonstrated with reference to FIG. 1, FIG.

As shown in FIG. 1, the filter part 5B is comprised by the platinum-type oxidation catalyst 18 and the metal filter 19 supported by the metal mesh provided in the upstream.

8 is a partially enlarged perspective view schematically showing the configuration of the metal filter 19 assembled in the filter unit constituting the apparatus of this example.

In the metal filter of this example, as shown in Fig. 8, a plurality of through holes 102 having oil surface protrusions 101 are drilled in the edge portion, and the sine wave is repeatedly repeated. It consists of the corrugated roll-shaped metal porous body 103 which rolled up the metal plate in multi-layered vortex shape, and let diesel exhaust gas pass through the interlayer clearance of this metal porous body 103, and is contained in the said diesel exhaust gas. It is a filter for capturing and removing graphite fine particles, and the through hole 102 is provided in the peak portion M and the curved portion V constituting the thermal relief. And the oil surface protrusion 101 is provided so that it may protrude toward the columnar recessed part 105 side.

FIG. 9 is a partially enlarged cross-sectional view schematically showing the configuration of a separate type of metal filter assembled in the filter unit constituting the device of this example, and FIG. 10 is a partially enlarged perspective view schematically showing the structure of the metal filter. to be.

As shown in Figs. 9 and 10, this separate type of metal filter is substantially flat compared to the metal plate 26 of the waveform which repeats the sine wave ups and downs, and the waveform of the metal plate 26 of the waveform. The metal flat plate 27 of the same width | variety as the width | variety of the metal plate 26 is rolled up by the multilayer in the state which overlapped with each other. The corrugated metal plate 27 is formed in a roll shape in which a plurality of through-holes 29 having surface projections 28 are formed in the edges thereof, and the metal plate 27 which repeats the sine wave ups and downs is rolled up in a multi-layer vortex. It consists of the metal porous body 30. On the other hand, in the metal flat plate 27, many through-holes 31 which do not have oil surface projections are drilled.

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 exterior 4, in other words, when assembling the inner tube 8 in the exterior 4, the front cover 8B (inlet pipe 6) and the rear In a state where the cover portion 8C (outlet pipe 7) is previously mounted in the exterior 4, the side cover 10 of the opening and closing opening 11 is opened, and each of the opening and closing openings 11 is opened. The filter units 5 and 5, the joint pipe 9 with a gasket, and the other type of gasket not shown are inserted. Next, the long bolt 1A of the attachment / detachment means 12 is inserted into the bolt insertion hole of the rear cover 4C of the exterior 4, and the nut (double nut) 13B is screwed in using a tool, A plate spring 14 sandwiched between the inner tube 8 and the outer tube 4 on the inflow side is pressed tightly (FIGS. 7, 11 and 12). When the long bolt 13A is tightened, the disc spring 14 is deformed by pressure, thereby the inner tube 8 is press-fixed to the exterior 4 and an inner tube 8 of an airtight structure is formed.

Function of Graphite Particle Removal Device

The graphite fine particle removal apparatus of the said structure is used by being assembled to the exhaust path of a diesel vehicle, ie, a diesel engine. In operation of the diesel engine, when the diesel exhaust gas passes through the interlayer gap 4 of the metal filter, as shown in FIG. 8, the oil level projection 101 is an obstacle of the flow F, specifically, a collision. As the piece / deceleration piece, it acts as a path change piece or as a through-hole introduction piece, the unburned graphite fine particles suspended in the exhaust gas of the metal filter 19 near the oil surface projection 101 or the through-hole 102. It is easy to be caught on the front and back. Among the unburned graphite fine particles trapped by the metal filter 19, a part of the unburned graphite fine particles is heated and burned by the corresponding metal filter 19 or the ambient atmosphere (exhaust gas 3) at high temperature, and is removed from the metal filter 19. The residue remains attached to the metal filter 19. As a result, the flow F of the exhaust gas 3 passing through the metal filter 19 is exhausted as a normal gas containing no graphite fine particles.

Separation and regeneration of filter units 5 and 5

When the filter unit 5 (metal filter 19) is clogged, the pressure sensor (clogging sensor) 16 reports 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 taking out the clogged filter units 5 and 5, the side cover 10 of the opening-and-closing opening part 11 is opened, and the attachment / detachment means 12 attached to the back cover 4C of the external appearance 4 is carried out. The long bolt 1A is loosened using a tool. Then, the disc spring 14 is opened from the press, and each part constituting the inner tube 8 (filter units 5 and 5, the joint pipe 9 with a gasket, the front cover 8B) (inlet pipe ( 6)), the rear cover part 8C (outlet pipe 7) is disengaged and disassembled (FIGS. 7, 11 and 12), and the operator removes the clogged filter units 5 and 5. It is taken out from the open and detachable opening part 11, and it heats to predetermined temperature for predetermined time in the exclusive regeneration furnace. By this heating, the unburned particle which clogged the filter units 5 and 5 burns, As a result, the filter units 5 and 5 are regenerated.

Moreover, taking out from the opening-and-closing opening part 11 is not limited to the filter unit 5, 5, According to necessity, the joint pipe 9 with a gasket or the front cover part 8B (inlet pipe 6) ), The rear cover part 8C (outflow pipe 7), etc. may be removed, or these may be left in the exterior 4.

Refitting the Filter Units (5, 5)

Next, when the filter units 5 and 5 are remounted in the exterior 4, the side cover 10 of the opening-and-closing opening 11 is opened again, and each filter unit is opened from the said opening-and-closing opening 11. Insert (5, 5). Next, the long bolt 1A, which is the attaching and detaching means 12, is inserted into the bolt insertion hole of the rear cover 4C of the exterior 4, and the nut (double nut) 13B is inserted by using a tool. The plate spring 14 sandwiched between the inner tube 8 and the outer tube 4 on the inflow side is pressed tightly (FIGS. 7, 11 and 12). When the long bolt 13A is tightened, the disc spring 14 is deformed and thus, the inner tube 8 is press-fixed to the outer tube 4, and the inner tube 8 of the airtight structure is formed again and remounted. Is complete.

The function of the safety device

During operation of the diesel engine, the bypass valve (safety valve) 15 opens when the pressure of the exhaust gas 3 of the inner tube 8 suddenly increases for some reason. As a result, the high-pressure discharge gas 3 passes through the open bypass valve (safety valve) 15 in the emergency bypass flow path K between the outer circumferential surface of the inner tube 8 and the inner circumferential surface of the outer appearance 4. ) Is discharged to the external space from the emergency discharge port drilled in the rear lid portion 4C of the exterior 4 via (). In this way, risks and inconveniences caused by explosive combustion such as oxygen flash are prevented.

As mentioned above, although the Example of this invention was described in detail by drawing, a specific structure is not limited to this Example, Even if there exists a design change etc. of the range which does not deviate from the summary of this invention, it is contained in this invention. For example, in the above-described embodiment, the detachable means 12 for detachably joining the inner tube 8 and the exterior 13 is detachably provided on the outflow side of the exhaust gas, but instead of the inflow of the exhaust gas, The detachable means 12 may be provided on the side. The detachable means is not limited to the long bolts 13A, 13A, ... and the nut (double nut) 13B, 13B, ....

In addition, in the above-mentioned embodiment, although the leaf | plate spring member (plate spring 14) is provided in the axial clearance gap between the front cover part 8B of the inner pipe | tube 8, and the front cover part 4B of the outer appearance 4, Alternatively, the 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 casing 4. The leaf spring member is not limited to the disc spring.

Industrial availability

The fine particle removal device of this invention is applicable not only to a diesel car but to all internal combustion engines. For example, the present invention can be applied to an internal combustion engine used in an emergency generator, a private generator, farm equipment, or the like. In addition, the present invention is not limited to the discharge path of the diesel gas, but it is advantageous to be assembled on the flow path of the heterogeneous gas.

As described above, according to the configuration of the present invention, it is possible to regenerate the filter in which clogging has advanced easily and at low cost. In addition, it is possible to prevent the explosive combustion of diesel particulates due to any cause, for example, even if an explosive combustion occurs, it is possible to prevent the burnout of the device due to this.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic cross section which shows schematic structure of the diesel particulate removal apparatus which is one Example of this invention.

FIG. 2 is an exploded view illustrating the diesel particulate removal device.

3 is a plan view showing an appearance of the diesel particulate removal device.

4 is a view showing an aspect of mounting a filter unit in the diesel particulate removal device.

5 is a perspective view showing a component (removable means) of the diesel particulate removal device.

Fig. 6 is a cross sectional view showing an overall mechanical configuration of the diesel particulate removal device.

7 is a photograph showing an aspect of mounting a filter unit in the diesel particulate removal device.

8 is a partially enlarged perspective view schematically showing the configuration of a metal filter assembled to a filter unit constituting the device.

9 is a partially enlarged cross-sectional view schematically showing the configuration of a metal filter of a separate type assembled in a filter unit constituting the device.

Fig. 10 is a partially enlarged perspective view schematically showing the configuration of the metal filter of the same kind.

11 is a photograph showing an aspect of detaching a filter unit in the diesel particulate removal device.

12 is a photograph showing an aspect of detaching a filter unit in the diesel particulate removal device.

♠ Explanation of the symbols for the main parts of the drawings.

1: diesel engine

2: discharge path

3: diesel exhaust gas

4: appearance

4A: outer cylinder

4B: front cover of exterior

4C: rear cover

5: filter unit (filter)

5A: Inner cylinder part (filter)

5B: Filter part (filter)

6: inlet pipe

7: outlet pipe

8: inner tube

8B: front cover of inner tube

8C: Rear cover of inner tube

9: joint pipe with gasket (gasket)

10: cover of opening and detaching opening

11: opening and closing opening

12: detachment means

13A: Long Bolt

13B: Nut (Double Nut)

13C: Power Support Plate

14: disc spring (plate spring member)

K: emergency bypass

15: bypass valve (safety valve)

16 pressure sensor (clogging sensor)

20: plate spring stand

Claims (20)

An external body having an opening on the inflow side and the outflow side of the gas, and mounted on the exterior, and having a filter for trapping or capturing and removing the particulates in the gas introduced therein; A fine particle removal apparatus which consists of, The filter constitutes an inner tube, and the gap between the inner tube and the outer tube is configured to function as an emergency bypass flow path of the gas when the pressure in the inner tube suddenly increases. Device. The method of claim 1, The said inner pipe | tube is provided with the safety valve which flows the said gas into an emergency bypass flow path when the pressure in the said inner pipe rapidly increased. The method of claim 1, The side surface of the said external part is provided with the removal opening part with a cover for attaching or detaching the said filter, The fine particle removal apparatus characterized by the above-mentioned. A plurality of filters which are assembled on the gas flow path and have openings on the inflow and outflow sides of the gas, and are mounted and mounted on the exterior, to trap or trap the particulates in the gas introduced and burn out; As a fine particle removal apparatus provided, The plurality of filters are connected to each other in accordance with the flow of the gas, and are also combined with the inlet pipe and the outlet pipe of the gas to form an inner tube of a sealed structure except for the inlet side and the outlet side. Particle removal device characterized in that. The method of claim 4, wherein A gasket is inserted between the plurality of filters, between the filter disposed on the most upstream side and the inlet pipe, and between the filter disposed on the most downstream side and the outlet pipe, and the sealing structure Particle removal apparatus characterized in that the inner tube is configured. The method of claim 5, The said inner pipe | tube is equipped with the said joint pipe | tube with the said gasket for connecting said several filter mutually. The microparticle removal apparatus characterized by the above-mentioned. The method of claim 4, wherein The side surface of the said external part is provided with the removal opening part with a cover for attaching or detaching said each filter, The microparticle removal apparatus characterized by the above-mentioned. The method of claim 7, wherein When assembling the inner tube, the cover portion of the detachable opening portion is opened, the respective filters are inserted from the detachable opening portion, the inner tube is assembled, and when the inner tube is disassembled, each of the filters is the detachable opening portion. Desorption means which take out from the process is provided, The microparticle removal apparatus characterized by the above-mentioned. The method of claim 8, And said detachable means comprises a single or a plurality of long bolts. The method of claim 8, And said detachable means comprises a single or a plurality of long bolts and a double nut. The method of claim 4, wherein An axial gap between the inner tube on the outflow side or the inflow side and the outer side is provided with a leaf spring member for fixing the inner tube to the outer side and absorbing thermal expansion. The method of claim 4, wherein When assembling the inner tube, the cover portion of the detachable opening portion is opened, the respective filters are inserted from the detachable opening portion, and the inner tube is assembled. A detachment means having a single or a plurality of long bolts is provided for taking out from the outlet, and the long bolts of the detachable means are inserted into the inflow side end surface or the outflow side end surface of the external appearance. A leaf spring member for absorbing thermal expansion is provided in an axial gap between the inner tube and the outer shell. When the long bolt is fastened, the leaf spring member is deformed by compression, so that the inner tube is fixed to the outer tube. Particulate removal apparatus, characterized in that consisting of. The method of claim 12, The leaf spring member is formed of a plate spring having an opening portion through which an inlet pipe or an outlet pipe is inserted into a central portion. The method of claim 12, The clearance between the inner tube and the outer tube is configured to function as an emergency bypass flow path of the gas when the pressure in the inner tube suddenly increases. The method of claim 14, The inner pipe is provided with a safety valve for flowing the gas into the bypass flow path in an emergency when the pressure in the inner pipe rapidly increases. The method of claim 4, wherein And a clogging sensor for notifying clogging of the filter. The method of claim 1, A filter assembled on an exhaust path of the diesel engine, having an opening on the inflow side and the outflow side of the diesel exhaust gas, and mounted on the exterior, to trap or trap particulate matter in the diesel exhaust gas and to remove and burn it; Particle removal apparatus comprising a. The method of claim 4, wherein A plurality of external parts assembled on a discharge path of the diesel engine, having openings on the inlet and outlet sides of the diesel exhaust gas, and mounted on the exterior, for trapping or capturing and removing particulates in the diesel exhaust gas; Particle removal apparatus characterized by including the filter of the. The diesel vehicle provided with the said microparticle removal apparatus of Claim 17. The diesel vehicle provided with the said microparticle removal apparatus of Claim 18.