WO2013084586A1

WO2013084586A1 - Dpf cleaning device and cleaning method

Info

Publication number: WO2013084586A1
Application number: PCT/JP2012/076282
Authority: WO
Inventors: 平田　公信
Original assignee: Ｕｄトラックス株式会社
Priority date: 2011-12-05
Filing date: 2012-10-11
Publication date: 2013-06-13
Also published as: JP2013116451A

Abstract

The purpose of the present invention is to provide a DPF cleaning device and a cleaning method for the same such that ash that has been deposited in the vicinity of a plug part on the exhaust side of a DPF can be reliably eliminated. According to the present invention, a nozzle moving device has a function for, when moving a nozzle (21) in a direction approaching the DPF (10), inserting the tip of the nozzle (21) into a cell (5) of the DPF (10) at least past a plug part, and the nozzle (21) has a function for causing fluid for cleaning, which is sprayed from spray holes (21a, 21b) in the tip of the nozzle (21), to be sprayed in a direction within a plane orthogonal to the central axis of the nozzle (21) or a direction inclining more to the direction of insertion of the nozzle (21) into the cell (5) than the aforementioned plane.

Description

DPF cleaning device and cleaning method

The present invention relates to a technique for cleaning a DPF removed from a vehicle.

In FIG. 12, a part of a cross section (cross section parallel to the axial direction of the DPF) of the DPF (diesel particulate filter) 10 is shown.
In FIG. 12, the exhaust gas to be processed flows from the upstream side (left side) to the downstream side (right side) of the DPF. In FIG. 12, an arrow Fg indicates the direction of the exhaust gas flow.
12, the DPF 10 includes an opening 1a (upstream opening), an opening 2b (downstream or discharge opening), and a plugging portion (blocking portion) 1b (upstream opening). Plugged portions) and plugged portions 2a (downstream plugged portions) are alternately arranged.

In the drawing, the upstream plugging portion 1 b is located at the left end of the DPF 10, and the downstream plugging portion 2 a is located at the right end of the DPF 10.
In other words, the right end of the flow path 3 extending to the right from the opening 1a at the left end (hereinafter, the flow path from the opening to the plugging portion is referred to as “cell”) is the downstream eye. It is blocked by the sealing part 2a. On the other hand, the left end of the cell 5 extending leftward from the opening 2b at the right end is blocked by the upstream plugging portion 1b.
In FIGS. 12 and 13, symbol E indicates a region where ash A is deposited.

Here, although the partition 4 which divides the

cells

3 and 5 is not clearly shown in FIG. 12, infinite number of very fine through holes are formed. The partition walls 4 are configured so as not to transmit particulates (particulate matter) but allow gas to pass through the fine through holes.
Exhaust gas to be purified flows from the upstream opening 1a at the left end of the DPF 10 and flows through the cell 3 to the right. The exhaust gas flowing through the cell 3 flows through the fine holes formed in the partition wall 4 and flows into the adjacent cells 5 because the plugged portion 2a at the right end of the cell 3 is blocked. 5 is discharged out of the DPF from the downstream opening 2b.
The exhaust gas after burning in the diesel engine and the particulates (particulate matter) contained therein are filtered when passing through the partition walls 4, and the exhaust gas permeates through the partition walls 4 to form particulates (particulate matter). Substance) adheres to the partition walls 4.

The soot occupying most of the particulates (particulate matter) adhering to the partition walls 4 is burned and removed when the DPF 10 is regenerated.
However, calcium (Ca), zinc (Zn), phosphorus (P) and the like contained in diesel engine fuel and engine oil remain in the DPF 10 cell as ash A after regeneration. The ash A is deposited in the region E in the vicinity of the plugged portion 2a on the downstream side of the cell 3 and on the upstream side of the plugged portion 2a.
When the accumulated ash A increases, the fine holes of the partition wall 4 are clogged, the exhaust purification performance is lowered, and the engine performance is seriously affected.

In the conventional technique, the DPF 10 is removed from the exhaust system of the vehicle, and as shown in FIG. Was.
However, as described above, the ash A is deposited in the downstream side plugged portion 2a of the DPF 10 and the upstream region E of the plugged portion 2a. As shown in FIG. 13, the high-pressure air that is the cleaning fluid does not flow into the region E where the air resistance is large, but the upstream side of the cell where the ash A is deposited has a lower resistance than the region E. It flows from the partition 4 into the cell. Therefore, the amount of high-pressure air passing through the region E where the ash A is accumulated is small, and a large amount of the high-pressure air is discharged out of the DPF from the opening 1a without blowing off the ash A.
Therefore, the efficiency of eliminating the ash A accumulated in the region E has been extremely low.

In the prior art, a honeycomb filter having a plugged portion has been proposed (see, for example, Patent Document 1).
However, the related art (Patent Document 1) does not solve the problem that the ash accumulated in the region near the downstream plugging portion cannot be sufficiently removed when the DPF is cleaned.

JP 2008-104944 A

The present invention has been proposed in view of the above-described problems of the prior art, and it is an object of the present invention to provide a DPF cleaning device and a cleaning method thereof that can reliably eliminate ash accumulated in the vicinity of the plugged portion on the discharge side of the DPF. It is said.

The DPF cleaning device of the present invention includes a base (30) on which the DPF (10) removed from the vehicle is placed, a nozzle (21) for injecting a cleaning fluid (for example, compressed air) from the tip, and the nozzle ( 21) A nozzle moving device that moves in a direction close to the DPF (10) and a direction away from the DPF (10), and a cleaning fluid supply mechanism (90) that supplies a cleaning fluid to the nozzle (21) In the DPF cleaning device (100),
When the nozzle moving device moves the nozzle (21) in a direction close to the DPF (10), the tip of the nozzle (21) is at least plugged into the cell (5) of the DPF (10). Has a function of inserting up to a position exceeding the plugging portion 2a) on the side,
The nozzle (21) allows the cleaning fluid sprayed from the spray holes (21a, 21b) at the tip of the nozzle (21) to be in a direction on a plane orthogonal to the central axis of the nozzle (21) and / or the plane. Direction in which the nozzle (21) is inserted into the cell (5) (a direction away from the opening 2b of the cell 5 in which the nozzle 21 is inserted: the DPF end surface 21b opposite to where the nozzle 21 is inserted) It has a function of injecting in a direction inclined in the direction of

Here, since the nozzle (21) injects a plurality of cleaning fluid jets, a plurality of nozzles (21a, 21b) are arranged on the circumference of the nozzle tip from the plurality of injection holes (21a, 21b). The cleaning fluid jet is preferably configured to be ejected radially outward.

In the present invention, only one nozzle (21) is provided, and the nozzle moving device adds the nozzle (21) to the direction close to the DPF (10) and the direction away from the DPF (10), It is preferable to have a function of moving in a direction parallel to the end surface on the nozzle (21) side of the DPF (10) placed on the base (the DPF fixing portion 31).

Or in this invention, it is preferable that the said nozzle (21) is provided with two or more.
In that case, when a plurality of the nozzles (21) are arranged in a row, the nozzle moving device moves the nozzle (21) in a direction close to the DPF (10) and in a direction away from the DPF (10). In addition, it is preferable that the DPF (10) placed on the platform (31) has a function of moving in a direction parallel to the end surface on the nozzle (21) side.
When the plurality of nozzles (21) are arranged in a plurality of rows and columns, the nozzle moving device (32) moves the nozzle (21) closer to the DPF (10) and from the DPF (10). It is preferable that it moves only in the direction of separation, and does not move in a direction parallel to the end face on the nozzle (21) side of the DPF (10) placed on the platform (31).

The DPF cleaning device of the present invention includes a base (30) on which the DPF (10) removed from the vehicle is placed, a nozzle (21) for injecting a cleaning fluid (for example, compressed air) from the tip, and the nozzle ( 21) A nozzle moving device that moves in a direction close to the DPF (10) and a direction away from the DPF (10), and a cleaning fluid supply mechanism (90) that supplies a cleaning fluid to the nozzle (21) In the DPF cleaning device (100),
When the nozzle moving device moves the nozzle (21) in the direction close to the DPF (10), the tip of the nozzle (21) is outside the DPF (10) and sealed in the cell (5). It has a function of approaching to a position near the stopper (downstream plugging portion 2a),
In the nozzle (21), the cleaning fluid sprayed from the spray holes (21a, 21b) at the tip of the nozzle (21) is closer to the cell (5) than the plane perpendicular to the central axis of the nozzle (21). It has the function to inject in the direction inclined (arrow dc direction).

Here, at least two nozzles (21-1, 21-2) are provided,
The tip of the two nozzles (21-1, 21-2) is the outside of the DPF (10) and the nozzle (21) is a plugging portion (downstream plugging in the cell (5)). The central axis of the nozzles (21-1, 21-2) from the injection holes (21a, 21b) at the tips of the two nozzles (21-1, 21-2) when approaching to a position near the stopper 2a) Two nozzles (21-1, 21-2) are jetted in a direction (in the direction of arrows dc-1, dc-2) inclined in a direction closer to the cell (5) than a plane orthogonal to The jet of the working fluid (arrows dc-1, dc-2) is plugged in the cell (5) between the two nozzles (21-1, 21-2) (downstream plugged portion 2a). It is preferable to have a function of colliding with ash (A: ash) deposited in the nearby region (E) (as if sandwiching it).

The method of cleaning the DPF (10) using the nozzle cleaning device (100) of the present invention described above includes a step of placing the DPF (10) removed from the vehicle on the base (the DPF fixing portion 31),
A nozzle (21) for ejecting a cleaning fluid (for example, compressed air) from the tip is moved in a direction close to the DPF (10) by using a nozzle moving device, and a cleaning fluid jet hole at the tip of the nozzle (21). Inserting (21a, 21b) into the cell (5) of the DPF (10) to a position at least exceeding the plugged portion (downstream plugged portion 2a);
From the injection hole (21a, 21b) at the nozzle tip, the direction on the plane orthogonal to the central axis of the nozzle and / or the direction in which the nozzle (21) is inserted into the cell (5) from the plane (nozzle 21) A step of injecting the cleaning fluid in a direction inclined in a direction away from the opening (2b) of the cell in which the nozzle 21 is inserted: a direction of the DPF end surface opposite to the nozzle 21 being inserted, and
In the step of ejecting the cleaning fluid, a plurality of cleaning fluid jets are ejected radially outward from a plurality of ejection holes arranged at equal intervals on the circumference of the nozzle tip.

Here, when only one nozzle (21) is provided, or when a plurality of nozzles (21) are arranged in one row, the cell (5) of the DPF (10) from the tip of the nozzle (21). ), The nozzle (21) is moved away from the DPF (10) to position the nozzle (21) outside the cell of the DPF (10). The nozzle (21) is preferably moved in a direction parallel to the end face (on the nozzle side).

A method of cleaning the DPF (10) using the nozzle cleaning device of the present invention described above (nozzle cleaning device of claim 5),
Placing the DPF (10) removed from the vehicle on the base (the DPF fixing portion 31);
A nozzle (21) for injecting a cleaning fluid (for example, compressed air) from the tip is moved in a direction close to the DPF (10) by using a nozzle moving device, and is outside the DPF (10). (5) a step of approaching a position in the vicinity of the plugging portion (downstream plugging portion 2a) in the inside,
The direction in which the nozzle (21) is inclined from the injection hole (21a, 21b) at the tip of the nozzle (21) in a direction closer to the inside of the cell (5) than the plane orthogonal to the central axis of the nozzle (21) (direction of arrow dc) ), And a step of injecting a cleaning fluid.

Here, at least two nozzles (21-1, 21-2) are provided,
The tip of the two nozzles (21-1, 21-2) is outside the DPF (10) and close to the plugging portion (downstream plugging portion 2a) in the cell (5). Close,
From the injection holes (21a, 21b) at the tips of the two nozzles (21-1, 21-2), the nozzles (21-1, 21) are located more than the plane perpendicular to the central axis of the nozzles (21-1, 21-2). -2) jets of two cleaning fluids (arrows dc-1, dc-2) that are jetted in a direction (arrows dc-1, dc-2) inclined in the direction approaching the cell (5) Ash (A: ash) accumulated in the region (E) in the vicinity of the plugging portion (downstream plugging portion 2a) of the cell (5) between the two nozzles (21-1, 21-2). ) It is preferable to collide (like sandwiching).

According to the present invention having the above-described configuration, when the nozzle (21) is moved in the direction close to the DPF (10), the cleaning fluid ejection holes (21a, 21b) at the tip of the nozzle (21) are provided with the DPF ( 10) the cell (5) is inserted to at least a position exceeding the plugging portion (downstream plugging portion 2a), so that the cleaning fluid ejection holes (21a, 21b) are arranged in the nozzle (21). In which the ash (A: ash) of the cell (5) adjacent to the cell (5) into which the cell is inserted is deposited (E: the region in the vicinity of the downstream plugging portion 2a and the plugging portion) It is located in the vicinity of the region upstream of 2a.
Then, the cleaning fluid has a nozzle direction (21 in the direction on the plane orthogonal to the central axis of the nozzle (21) (direction of the arrow dr) and / or the plane (plane orthogonal to the central axis of the nozzle 21). ) Is inserted into the cell (5) (upstream side: the direction away from the opening 2b of the cell 5 in which the nozzle 21 is inserted: the direction of the DPF end surface opposite to where the nozzle 21 is inserted) Since the cleaning fluid is ejected from the tip of the nozzle 21, the cleaning fluid is adjacent to the cell (5) in which the nozzle 21 is inserted. Ash (A) accumulated in the region (E) near the plugging portion (downstream plugging portion 2a).
As the cleaning fluid jet collides, the accumulated ash (A) is peeled off from the region (E) in the vicinity of the plugged portion (2a) and is opposite to the plugged portion (2a) in the cell (3). Is blown off to the cell opening side (1a) on the side and discharged out of the DPF (10).
Therefore, during cleaning, the ash (A) deposited in the region E in the vicinity of the plugged portion (2a) of the cell (3) is reliably removed.

In other words, according to the present invention, the nozzle (21) is inserted into the cell (5) from the one end face (2b) side of the DPF (10), so that the ash (A) is deposited (E: cell). 3, the cleaning fluid ejection holes (21 a, 21 b) at the tip of the nozzle (21) are positioned in the vicinity of the downstream plugging portion 2 a and adjacent to the region upstream of the plugging portion 2 a. Become.
Therefore, the direction on the plane orthogonal to the central axis of the nozzle (21) and / or the direction in which the nozzle (21) is inserted into the cell (5) from the plane (of the cell 5 in which the nozzle 21 is inserted). The cleaning fluid jet that is jetted in a direction inclined in the direction away from the opening 2b: the direction of the DPF end face 21b opposite to where the nozzle 21 is inserted is a portion where the ash (A) is deposited. Therefore, the accumulated ash (A), which is difficult with the conventional cleaning device, can be easily removed.
Further, the cleaning fluid jet has a direction in which the nozzle (21) is inserted into the cell (5) (in the cell 5 in which the nozzle 21 is inserted) rather than a direction on a plane orthogonal to the central axis of the nozzle (21). The ash peeled from the region (E) in the vicinity of the plugging portion (2a) because the jetting is performed in a direction inclined in the direction away from the opening 2b: the direction of the end surface on the opposite side from where the nozzle 21 is inserted. (A) has a component which moves toward the cell opening part (1a) on the opposite side to the plugging part (2a). Therefore, the ash (A) is easily discharged from the DPF (10).

In the present invention, if a plurality of nozzles (21) are provided, a cleaning fluid jet from a plurality of directions is applied to the ash (A) deposited in the region (E) near the plugging portion (2a) of a certain cell. Can be made to collide.
As a result, the cleaning fluid is sprayed so as to sandwich the ash (A) accumulated in the region (E), and the ash (A) may be peeled off from the region (E) in the vicinity of the plugged portion (2a). Furthermore, the efficiency of removing the ash (A) from the DPF (10) is improved.

1 is a block diagram showing a first embodiment of the present invention. It is a perspective view of the nozzle head in a 1st embodiment. FIG. 3 is a detailed cross-sectional view of a part A in FIG. 2. FIG. 4 is a view shown by an arrow Y in FIG. 3. It is a partial cross section figure showing removal of particulates in DPF in a 1st embodiment. It is a partial cross section figure showing removal of particulates by the 1st modification of a 1st embodiment. It is a partial cross section figure showing removal of particulates by the 2nd modification of a 1st embodiment. It is a perspective view of the nozzle head in 2nd Embodiment of this invention. It is the figure which looked at the PDF cleaned in 2nd Embodiment from the downstream. It is a partial cross section figure showing removal of particulates by a 3rd embodiment of the present invention. It is a partial cross section figure showing removal of particulates by the modification of a 3rd embodiment. It is an axial sectional view of a DPF. It is sectional drawing which showed the outline | summary of the DPF cleaning in a prior art.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In FIG. 1, the DPF cleaning device generally indicated by a reference symbol includes a nozzle head 20, a base 30, a cleaning fluid supply mechanism 90, and a collection container 60.

The cleaning fluid supply mechanism 90 includes an air compressor 40, a high-pressure air tank 50, and a high-pressure air line La. The high-pressure air line La has a line La1 and a line La2.
The line La1 connects the air compressor 40 and the high-pressure air tank 50. The line La2 connects the high-pressure air tank 50 and the upper surface 20u of the nozzle head 20.

A nozzle 21 is attached below the nozzle head 20, and a head support member 22 is provided on the nozzle head 20.
The base portion 30 includes a DPF fixing portion 31 on which the DPF 10 is placed, a stand 32, and a particulate receiving portion 33 that is removed from the DPF 10.
The stand 32 is disposed perpendicular to the upper surface (DPF placement surface) of the DPF fixing portion 31.
The head support member 22 in the nozzle head 20 is configured to engage the stand 32 and move the nozzle head 20 in the axial direction (vertical direction) of the stand 32 by a head moving mechanism (not shown). .

A dust box 61 is provided at the bottom of the collection container 60, and the dust box 61 accommodates the particulates collected from the DPF 10. The upper part of the recovery container 60 has a reduced diameter on the upper end side, and is formed in a so-called “funnel” shape.
The upper end of the collection container 60 is connected to the intake port 81 of the blower 80. A filter 70 is interposed at the boundary between the upper end of the recovery container 60 and the intake port 81 of the blower 80, and the particulates captured in the recovery container 80 during the exhaust discharged from the exhaust port 82 of the blower 80. Is configured not to leak.
The particulate receiving portion 33 in the pedestal 30 is connected to the outer peripheral portion of the collection container 60 by a particulate collection line Lp.

The nozzle 21 will be described with reference to FIGS.
FIG. 2 shows the operation direction of the nozzle 21. 2 and 1, the arrow Dv indicates that the nozzle 21 (or the nozzle head 20) can move in the vertical direction (vertical direction) along the stand 32 (see FIG. 1).
An arrow Dh indicates that the nozzle 21 (nozzle head 20) can move in the horizontal direction.
The arrow Ds indicates that the nozzle 21 (nozzle head 20) can move in the horizontal direction and in a direction orthogonal to the arrow Dh.

The four arrows without reference numerals in FIG. 2 indicate the injection direction of the high-pressure air that is the cleaning fluid, and indicate the radially outward injection direction in the plane orthogonal to the axis of the nozzle 21.
Here, the cleaning fluid may be not only high-pressure air but also other gases, water or other liquids. However, considering the drying of the DPF 10 after cleaning, air or other gas is suitable as the cleaning fluid.
Although not clearly shown in FIG. 2, as is clear from FIGS. 3 and 5, the high-pressure air injected from the tip of the nozzle 21 is in the radial direction on the plane orthogonal to the axis of the nozzle 21 (in the direction of the arrow dr in FIG. 5). 2) in FIG. 2 (in the cell, in the upstream direction of the cell: the direction opposite to the side where the nozzle is inserted) (in the direction of arrow dc in FIG. 5). Is also injected.

3 and 4, two types of injection holes 21 a and 21 b are formed near the tip of the nozzle 21.
Four injection holes 21a are formed, and are arranged in a direction on a plane (not shown) orthogonal to the central axis Lc of the nozzle 21 and at equal positions (every 90 °) on the outer periphery of the nozzle.
Four injection holes 21b are also formed, and are arranged on the outer peripheral surface between the nozzle tip 21t and the injection hole 21a.
From the injection hole 21a, high-pressure air (cleaning fluid) is injected in a radial direction (a direction indicated by an arrow dr in FIG. 5) in a plane orthogonal to the axis of the nozzle 21. Then, from the injection hole 21b, the direction in which the nozzle 21 is inserted into the cell 5 (the flow path indicated by reference numeral 5 in FIG. 5) (the nozzle 21 is closer to the plane than the plane (a plane orthogonal to the axis of the nozzle 21)). A direction inclined in the direction away from the opening 2b of the inserted cell 5, that is, the direction of the plugged portion 1b opposite to the opening 2b into which the nozzle 21 is inserted (the direction of arrow dc in FIG. 5). Then, high-pressure air (cleaning fluid) is injected.

Next, with reference to FIG.1 and FIG.5, the aspect which cleans DPF10 using the nozzle cleaning apparatus 100 of 1st Embodiment is demonstrated.
When cleaning the DPF 10 using the nozzle cleaning device 100 of the first embodiment, first, the DPF 10 removed from the vehicle is placed on the DPF fixing portion 31 of the pedestal 30.
Next, the nozzle 21 is moved in a direction approaching the DPF 10 (downward direction of the arrow Dv in FIG. 1) using a nozzle moving device (not shown clearly). The nozzle holes 21a and 21b at the tip of the nozzle extend into the cell 5 of the DPF 10 at least beyond the downstream plugging portion 2a (the position inside the cell 5 relative to the downstream plugging portion 2a). Insert (see FIG. 5).

Then, high-pressure air is ejected from the ejection hole 21a at the tip of the nozzle radially outward (in the direction of the arrow dr) on a plane perpendicular to the central axis Lc of the nozzle. At the same time, from the injection hole 21b at the tip of the nozzle, the upstream side of the DPF 10 (the direction in which the nozzle 21 is inserted into the cell 5: the cell in which the nozzle 21 is inserted) from the plane (plane perpendicular to the central axis Lc of the nozzle). High-pressure air is injected in a direction (arrow dc direction) inclined in a direction away from the opening 2b of 5: a direction of the DPF end surface on the opposite side from where the nozzle 21 is inserted.
Here, when high-pressure air is injected, a plurality of high-pressure air jets are injected radially outward from a plurality of injection holes 21 a and 21 b arranged on the circumference of the nozzle 21 at equal intervals. Is done.

After high pressure air is injected into the cell 5 of the DPF 10 from the tip of the nozzle 21, the nozzle 21 is moved in a direction away from the DPF 10, and the nozzle 21 is positioned outside the cell of the DPF 10.
Thereby, the cleaning in one cell 5 in the DPF 10 is completed. When the cleaning of the one cell 5 is completed, the nozzle 21 is moved in a direction parallel to the end surface (on the nozzle side) of the DPF 10, and the cleaning of the adjacent cell 5 is executed according to the above procedure. .

According to the first embodiment having the above-described configuration, when the nozzle 21 is moved in the direction approaching the DPF 10, the injection holes 21 a and 21 b at the tip of the nozzle 21 are at least plugged into the cell 5 of the DPF 10. It is inserted to a position beyond the downstream plugging portion. Therefore, the injection holes 21a and 21b are located in the vicinity of the region E where the ash A is deposited in the cell 3 adjacent to the cell 5 in which the nozzle 21 is inserted.
The high-pressure air that is the cleaning fluid is in a direction on the plane orthogonal to the central axis of the nozzle 21 (in the direction of the arrow dr) and a direction upstream of the plane (plane orthogonal to the central axis of the nozzle 21). In FIG. 5, left: the direction in which the nozzle 21 is inserted into the cell 5: the direction away from the opening 2b of the cell in which the nozzle 21 is inserted: the direction of the DPF end surface opposite to where the nozzle 21 is inserted ) In the direction inclined (arrow dc direction).

The high-pressure air jetted from the tip of the nozzle 21 in the directions of the arrow dr and arrow dc is the region E (the downstream plugging portion 2a of the downstream plugging portion 2a) in the cell 3 adjacent to the cell 5 in which the nozzle 21 is inserted. The region near the upstream side: the ash A accumulated in the left side region in FIG. 5 with respect to the plugging portion 2a).
When the jet of high-pressure air collides, the accumulated ash A is separated from the region E in the vicinity of the plugging portion 2a, blown off to the cell opening side 1a opposite to the plugging portion 2a, and discharged out of the DPF 10 Is done.
Therefore, during cleaning, the ash A deposited in the region E in the vicinity of the plugged portion 2a of the cell 3 is reliably removed.

In other words, in the first embodiment shown in FIGS. 1 to 5, the ash A is deposited by inserting the nozzle 21 into the cell 5 from the end surface (the right end in FIG. 5) on the downstream side (discharge side) of the DPF 10. Next to the region E (the region near the plugging portion 2a of the cell and upstream of the plugging portion 2a), the injection holes 21a and 21b at the tip of the nozzle 21 are located.
Therefore, the jet of cleaning fluid (high pressure air) ejected from the ejection holes 21a and 21b is ejected toward the region E where the ash A is accumulated, which is difficult to be accumulated by the conventional cleaning device. The removal of ash A is easily performed.
In addition, the jet of high-pressure air flows in a direction in which the nozzle 21 is inserted into the cell 5 relative to a direction perpendicular to the central axis of the nozzle 21 (upstream of the DPF 10: the opening of the cell 5 in which the nozzle 21 is inserted). Since it is also injected in the direction (arrow dc direction) inclined in the direction away from the portion 2b: the direction of the end surface on the opposite side from where the nozzle 21 is inserted, it peels off from the region E in the vicinity of the plugging portion 2a. The ash A has a velocity component that moves the ash A toward the cell opening 1a opposite to the plugging portion 2a. Therefore, the ash A is easily discharged from the DPF 10.

Here, a first modification of the first embodiment of FIGS. 1 to 5 will be described with reference to FIG.
For example, as shown in FIG. 5, in the first embodiment, the cleaning fluid includes a direction dr on a plane orthogonal to the central axis of the nozzle 21 and a direction upstream of the plane (left side: nozzle in FIG. 5). The direction in which the nozzle 21 is inserted into the cell 5: the direction away from the opening 2b of the cell in which the nozzle 21 is inserted: the direction dc inclined in the direction of the DPF end surface on the opposite side from where the nozzle 21 is inserted It is injected to both sides.
On the other hand, in the first modification of FIG. 6, the cleaning fluid is injected only in the direction dr on the plane orthogonal to the central axis of the nozzle 21.
Configurations and operational effects other than those described above in the first modification of FIG. 6 are the same as those of the first embodiment of FIGS.

FIG. 7 shows a second modification of the first embodiment of FIGS.
In the second modification shown in FIG. 7, the cleaning fluid is upstream of the plane orthogonal to the central axis of the nozzle 21 (left side in FIG. 7: the direction in which the nozzle 21 is inserted into the cell 5: the nozzle 21 Injected only in the direction dc inclined in the direction away from the opening 2b of the inserted cell: the direction of the DPF end surface opposite to the side where the nozzle 21 is inserted.
The configurations and operational effects of the second modification of FIG. 7 other than those described above are the same as those of the embodiment of FIGS.

Next, a second embodiment will be described with reference to FIG.
In the DPF cleaning device 100 in the first embodiment shown in FIGS. 1 to 7, the number of the nozzles 21 is plural (in the example shown in the figure) in the second embodiment in FIG. Then 8). In FIG. 8, the illustration of the overall configuration diagram of the nozzle cleaning device is omitted.
In the second embodiment of FIG. 8, the plurality of nozzles 21 are arranged at a common pitch on one row on the nozzle arrangement surface of the nozzle head 20A.

If the pitch between the rows and columns of the cells of the DPF 10 shown in FIG. 9 is equal and the diagonal line connecting the outer edge corners of the 16 × 16 square matrix is equal to or smaller than the diameter of the DPF 10, the nozzle cleaning device according to the second embodiment When cleaning, the DPF 10 can be cleaned for each column.
For the cells outside the 16-row × 16-column square matrix, for example, the nozzle head 20 (nozzle head having only one nozzle 21) of the first embodiment may be used to clean each cell.

According to the second embodiment of FIG. 8, after a cleaning fluid is injected into the cell 5 of the DPF 10 from the tip of the nozzle 21 in a certain row, the nozzle 21 is moved in a direction away from the DPF 10, and the nozzle 2 is temporarily moved. The same operation is performed by positioning the nozzle 21 outside the cell of the DPF 10, moving the nozzle 21 parallel to the downstream end surface (exhaust gas discharge side) of the DPF 10, and moving immediately above the row of cells to be cleaned next. .
If cleaning of all the columns in the 16 rows × 16 columns square matrix is completed, then the remaining cells are cleaned with the nozzle head 20 according to the first embodiment (type having only one nozzle 21). Good.
As a result, when the second embodiment of FIG. 8 is used, the cleaning processing time is shortened compared to the first embodiment of FIGS.
Other configurations and operational effects in the second embodiment of FIG. 8 are substantially the same as those of the first embodiment of FIGS.

Although not shown, the DPF cleaning device includes a number of nozzles corresponding to all of the cells 5 that are open on the downstream side (discharge side) of the DPF at positions corresponding to the opened cells 5. If the nozzle head is provided, the DPF can be cleaned at a time.

Next, a third embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 10, in the third embodiment, the tip of the nozzle 21 is close to the position outside the DPF 10 (downstream side) and near the downstream plugging portion 2 a in the cell 5. The However, unlike the embodiments shown in FIGS. 1 to 9, the nozzle 21 is not inserted into the DPF 10 beyond the downstream plugging portion 2a in the cell 5.
The high-pressure air (cleaning fluid) ejected from the ejection hole 21a at the tip of the nozzle 21 is inclined in the direction indicated by the arrow dc (the direction in which the nozzle 21 is closer to the cell 5 than the plane orthogonal to the central axis of the nozzle 21). ).

In the third embodiment of FIG. 10, the nozzle 21 is not inserted into the cell 5, but in the state close to the position near the downstream plugging portion 2 a in the cell 5, the arrow dc extends from the tip of the nozzle 21. High pressure air is jetted in the direction shown. The high-pressure air indicated by the arrow dc collides with the ash A accumulated in the region E on the upstream side (left side in FIG. 10) from the downstream plugging portion 2a, and blows the ash A upstream.
In other words, in the third embodiment of FIG. 10, the ash deposited in the region E on the upstream side (the left side in FIG. 10) rather than the downstream plugging portion 2 a without inserting the nozzle 21 into the cell 5. A can be cleaned.
The configurations and operational effects of the third embodiment of FIG. 10 other than those described above are the same as those of the embodiments of FIGS.

Next, a modification of the third embodiment will be described with reference to FIG.
In FIG. 11, two nozzles 21-1 and 21-2 are provided, and the two nozzles 21-1 and 21-2 are arranged so as to sandwich the cell 5A3.
As described in FIG. 10, the book nozzles 21-1 and 21-2 in FIG. 11 have tips at the outside of the DPF 10 and in the vicinity of the downstream plugging portion 2a in the cell 5A3. However, it does not enter the DPF 10 beyond the downstream plugging portion 2a.

From the injection holes 21a and 21b at the tips of the two nozzles 21-1 and 21-2, the direction indicated by the arrows dc-1 and dc-2 (the nozzle is more than the plane perpendicular to the central axis of the nozzles 21-1 and 21-2) Two high-pressure air (cleaning fluid) jets dc-1 and dc-2 are jetted in a direction in which 21-1 and 21-2 are inclined in a direction approaching the cell 5A3.
The two jetted high-pressure air jets dc-1 and dc-2 are upstream of the plugging portion 2a on the downstream side of the cell 5A3 between the nozzles 21-1 and 21-2 (on the left side in FIG. 11). The ash A accumulated in the region E collides so as to sandwich it.
The ash A deposited in the region E on the upstream side (left side in FIG. 11) of the downstream side plugging portion 2a of the cell 5A3 between the nozzles 21-1 and 21-2 is pressurized from both the upper and lower directions in FIG. As a result of the collision of the air jets dc-1 and dc-2, the ability to remove the ash A accumulated in the region E is further improved as compared with the case of FIG.
The configurations and operational effects of the modification of FIG. 11 other than those described above are the same as those of the third embodiment of FIG.

It should be noted that the illustrated embodiment is merely an example, and is not a description of the purpose of limiting the technical scope of the present invention.

3, 5, 5A3 ... flow path /

cell

1b, 2a ... plugging part 20 ... nozzle head 21 ... nozzle 30 ... base part 31 ... DPF fixing part 32 ... Stand 40 ... Air compressor 50 ... High pressure air tank 60 ... Collection container 61 ... Dust box 70 ... Filter 80 ... Blower

Claims

A base for placing the DPF removed from the vehicle, a nozzle for ejecting a cleaning fluid from the tip, a nozzle moving device for moving the nozzle in a direction close to the DPF and a direction away from the DPF, and for cleaning the nozzle In the DPF cleaning device provided with the cleaning fluid supply mechanism for supplying the fluid,
The nozzle moving device has a function of inserting the nozzle tip into a cell of the DPF up to a position exceeding at least the plugging portion when moving the nozzle in a direction close to the DPF.
The nozzle tilts the cleaning fluid sprayed from the nozzle hole at the tip of the nozzle in a direction on a plane orthogonal to the central axis of the nozzle and / or in a direction in which the nozzle is inserted into the cell. A DPF cleaning device having a function of spraying in a direction.
The nozzle has a plurality of injection holes formed at a tip thereof for injecting a plurality of cleaning fluid jets, and the plurality of cleaning fluid jets are injected at equal intervals in a circumferential direction of the nozzle tip. Item 1. A DPF cleaning device according to item 1.
The nozzle is provided with only one nozzle, and the nozzle moving device includes an end surface on the nozzle side of the DPF placed on the platform in addition to a direction in which the nozzle is close to the DPF and a direction in which the nozzle is separated from the DPF. The DPF cleaning device according to claim 1, which has a function of moving in a parallel direction.
The DPF cleaning device according to claim 1, wherein a plurality of the nozzles are provided.
A base for placing the DPF removed from the vehicle, a nozzle for ejecting a cleaning fluid from the tip, a nozzle moving device for moving the nozzle in a direction close to the DPF and a direction away from the DPF, and for cleaning the nozzle In the DPF cleaning device provided with the cleaning fluid supply mechanism for supplying the fluid,
The nozzle moving device has a function of moving the nozzle tip close to the position near the plugging portion in the cell outside the DPF when moving the nozzle in the direction close to the DPF.
The nozzle has a function of ejecting the cleaning fluid ejected from the ejection hole at the tip of the nozzle in a direction inclined in a direction in which the nozzle is closer to the cell than a plane perpendicular to the central axis of the nozzle. DPF cleaning device characterized.
At least two nozzles are provided,
When the two nozzle tips are located outside the DPF and close to the position near the plugging portion in the cell, the two nozzle tips are connected to the central axis of the nozzle from the injection holes at the two nozzle tips. Two cleaning fluid jets, which are ejected in a direction in which the nozzle is inclined closer to the cell than the plane perpendicular to each other, are deposited on the ash deposited in the region near the plugging portion of the cell between the two nozzles. 6. The DPF cleaning device according to claim 5, which has a collision function.
Placing the DPF removed from the vehicle on the platform;
The nozzle that ejects the cleaning fluid from the tip is moved in the direction close to the DPF using a nozzle moving device, and the cleaning fluid jet hole at the tip of the nozzle extends into the DPF cell at least beyond the plugging portion. A process of inserting until
A step of injecting the cleaning fluid from the injection hole at the tip of the nozzle in a direction on a plane perpendicular to the central axis of the nozzle and / or a direction inclined from the plane in a direction in which the nozzle is inserted into the cell. Have
In the step of spraying the cleaning fluid, a plurality of cleaning fluid jets are sprayed radially outward from a plurality of spray holes arranged at equal intervals on the circumference of the nozzle tip. Method.
Either one nozzle is provided or a plurality of nozzles are arranged in a line, and after the cleaning fluid is sprayed into the DPF cell from the nozzle tip, the nozzle is moved away from the DPF. Then, the nozzle is positioned outside the cell of the DPF, and the nozzle is moved in a direction parallel to the end face of the DPF.
Placing the DPF removed from the vehicle on the platform;
A step of moving a nozzle for injecting a cleaning fluid from the tip in a direction approaching the DPF using a nozzle moving device, and approaching to a position near the plugging portion in the cell outside the DPF;
A DPF having a step of injecting a cleaning fluid from an injection hole at the tip of the nozzle in a direction inclined to a direction in which the nozzle is inserted into the cell rather than a plane orthogonal to the central axis of the nozzle. Cleaning method.
At least two nozzles are provided,
Two nozzle tips are outside the DPF and close to the position near the plugging portion in the cell,
Two cleaning fluid jets are jetted from the jet holes at the tip of the two nozzles in a direction inclined from the plane perpendicular to the central axis of the nozzle in the direction in which the nozzle is inserted into the cell. The DPF cleaning method of Claim 9 which collides with the ash deposited in the area | region of the plugging part vicinity of the cell between nozzles.