Ash removal device for particle filter, engine exhaust system and vehicle

Abstract

The utility model relates to the technical field of tail gas treatment, and particularly discloses an ash removal device for a particle filter, an engine exhaust system and a vehicle, and the ash removal device for the particle filter comprises a compressed gas tank, a blowback pipe assembly and a plugging assembly. The other end of the blowback pipe assembly is inserted into the cavity of the particle filter shell and located on the downstream portion of the particle filter body in the exhaust airflow direction, the exhaust hole is located on the upstream portion of the particle filter body in the exhaust airflow direction, and therefore when the particle filter needs to clean dust, the driving piece drives the blocking piece to avoid the exhaust hole, and dust removal is achieved. Compressed gas is conveyed to the reverse blowing pipe assembly through the compressed gas tank, so that the purpose of reverse blowing of the particle filter main body is achieved; and if dust removal is not needed, the compressed gas tank does not convey compressed gas to the blowback pipe assembly, and the driving piece drives the blocking piece to block the exhaust hole, so that the problem that dust in the particle filter cannot be removed in time in the prior art is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas treatment technical field especially relates to a dust cleaning device for particle filter, engine exhaust system and vehicle. BACKGROUND

[0002] At present, the engine exhaust system of the automobile is installed with the particle filter to reduce the flue gas content in the tail gas, along with the extension of the use time, the dust stored in the particle filter gradually increases. In the prior art, when the particle filter stores too much dust and cannot remove the dust in time by using the professional dust removal mechanism, the particle filter resistance increases, which increases the vehicle fuel consumption and reduces the vehicle speed. SUMMARY

[0003] The utility model discloses a dust cleaning device for particle filter, engine exhaust system and vehicle to solve the problem that the dust in the particle filter cannot be removed in time in the prior art.

[0004] On the one hand, the dust cleaning device for particle filter comprises a compressed gas tank, a back flushing pipe assembly, one end of the back flushing pipe assembly is communicated with the compressed gas tank, the other end of the back flushing pipe assembly is inserted into the cavity of the particle filter shell and is located downstream of the particle filter body along the exhaust gas flow direction, and the compressed gas tank can provide compressed gas for the back flushing pipe assembly, a plugging assembly comprising a plugging piece and a driving piece, the driving piece is arranged on the oxidation type catalyst housing, the oxidation type catalyst has an exhaust hole, the exhaust hole is located upstream of the particle filter body along the exhaust gas flow direction, and the driving piece and the plugging piece are drivingly connected to drive the plugging piece to plug or avoid the exhaust hole.

[0005] As an optional technical scheme of the dust cleaning device for particle filter, the plugging piece is a plugging disc, the diameter of the plugging disc is greater than the diameter of the exhaust hole, and the driving piece and the plugging disc are drivingly connected to drive the plugging disc to plug or avoid the exhaust hole.

[0006] As an optional technical scheme of the dust cleaning device for particle filter, the driving piece comprises a mounting bracket and a linear drive motor, the mounting bracket is connected with the oxidation type catalyst housing, and the linear drive motor is installed on the mounting bracket, the linear drive motor and the plugging disc are drivingly connected to drive the plugging disc to move.

[0007] As an optional technical scheme of the dust cleaning device for particle filter, the dust cleaning device for particle filter further comprises an electromagnetic valve arranged on the back flushing pipe assembly, and the electromagnetic valve can control the on-off of the back flushing pipe assembly.

[0008] As an optional technical solution of the ash removal device for the particulate filter, the back blowing pipe assembly comprises a connecting pipe and a back blowing pipe in communication with each other, one end of the connecting pipe is in communication with the compressed gas tank, the other end of the connecting pipe is in communication with one end of the back blowing pipe, and the other end of the back blowing pipe is inserted into the cavity of the particulate filter shell.

[0009] As an optional technical solution of the ash removal device for the particulate filter, the back blowing pipe has a plurality of back blowing holes arranged at intervals, and each of the back blowing holes is in communication with the cavity of the particulate filter shell.

[0010] As an optional technical solution of the ash removal device for the particulate filter, the connecting pipe comprises a first pipe body and a second pipe body, one end of the first pipe body is in communication with the compressed gas tank, the other end of the first pipe body is in communication with one end of the electromagnetic valve, the other end of the electromagnetic valve is in communication with one end of the second pipe body, and the other end of the second pipe body is in communication with one end of the back blowing pipe.

[0011] As an optional technical solution of the ash removal device for the particulate filter, the ash removal device for the particulate filter further comprises a controller, the electromagnetic valve and the driving member are electrically connected with the controller, the controller controls the on-off of the electromagnetic valve and controls the working of the driving member.

[0012] In another aspect, the utility model provides a kind of engine exhaust system, including selective catalytic reduction outer shell, selective catalytic reduction main body, particulate filter shell, particulate filter main body, oxidation type catalytic converter shell, oxidation type catalytic converter main body and ash removal device for particulate filter in any of above-mentioned scheme, the selective catalytic reduction outer shell and one end of the particulate filter shell are connected, the selective catalytic reduction main body is located in the selective catalytic reduction outer shell, the particulate filter main body is located in the particulate filter shell, the other end of the particulate filter shell and the oxidation type catalytic converter shell are connected, and the oxidation type catalytic converter main body is located in the oxidation type catalytic converter shell.

[0013] In another aspect, the utility model provides a kind of vehicle, including engine exhaust system in any of above-mentioned scheme.

[0014] The utility model has the advantages that:

[0015] The utility model provides a kind of ash removal device for particle filter, the ash removal device for particle filter comprising compressed gas tank, back flushing pipe assembly and plugging assembly. Among them, plugging assembly, comprising plugging piece and driving part. The ash removal device for particle filter of the utility model is inserted into the cavity of particle filter shell with the other end of back flushing pipe assembly, and located in the downstream of particle filter main body along exhaust gas flow direction, exhaust hole is located in the upstream of particle filter main body along exhaust gas flow direction, so when particle filter needs to be cleaned, driving piece drives plugging piece to avoid exhaust hole, compressed gas is transported to back flushing pipe assembly by compressed gas tank, to realize the purpose of back flushing to particle filter main body, ensure that the dust of particle filter main body is cleaned in time;If it is not necessary to clean, then compressed gas tank does not transport compressed gas to back flushing pipe assembly, and driving piece drives plugging piece to block exhaust hole. The ash removal device for particle filter of the utility model effectively solves the problem that dust in particle filter cannot be cleaned in time in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is structure schematic view of ash removal device for particle filter in the utility model embodiment;

[0017] Fig. 2 It is explosion view of ash removal device for particle filter in the utility model embodiment;

[0018] Fig. 3 It is the schematic view of part structure of ash removal device for particle filter in the utility model embodiment.

[0019] In the drawing:

[0020] 1, compressed gas tank;

[0021] 2, back flushing pipe assembly;21, connecting pipe;211, first pipe body;212, second pipe body;22, back flushing pipe;

[0022] 3, plugging assembly;31, plugging piece;32, driving part;321, mounting bracket;322, linear motor;

[0023] 4, electromagnetic valve;

[0024] 5, controller;

[0025] 61, particle filter shell; 62, particle filter main body;

[0026] 71, oxidation type catalytic converter shell; 711, exhaust hole; 72, oxidation type catalytic converter main body;

[0027] 81, selective catalytic reduction device shell;82, selective catalytic reduction device main body. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature on the second feature include the "above" and "oblique above" of the first feature on the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature on the second feature include the "below" and "oblique below" of the first feature on the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0032] As Figs. 1-3As shown, the embodiment provides a soot cleaning device for a particle filter, which comprises a compressed gas tank 1, a back flushing pipe assembly 2 and a blocking assembly 3. Wherein, one end of the back flushing pipe assembly 2 is communicated with the compressed gas tank 1, the other end of the back flushing pipe assembly 2 is inserted into the cavity of the particle filter shell 61 and located downstream of the particle filter body 62 along the exhaust gas flow direction, and the compressed gas tank 1 can provide compressed gas for the back flushing pipe assembly 2; the blocking assembly 3 comprises a blocking piece 31 and a driving piece 32, the driving piece 32 is arranged on the oxidation catalyst shell 71, the oxidation catalyst has an exhaust hole 711 which is located upstream of the particle filter body 62 along the exhaust gas flow direction, and the driving piece 32 and the blocking piece 31 are drivingly connected to drive the blocking piece 31 to block or avoid the exhaust hole 711.

[0033] The soot cleaning device for a particle filter is adopted, the other end of the back flushing pipe assembly 2 is inserted into the cavity of the particle filter shell 61 and located downstream of the particle filter body 62 along the exhaust gas flow direction, the exhaust hole 711 is located upstream of the particle filter body 62 along the exhaust gas flow direction, so that when the particle filter needs to be cleaned, the driving piece 32 drives the blocking piece 31 to avoid the exhaust hole 711, the compressed gas tank 1 delivers compressed gas to the back flushing pipe assembly 2, so as to realize the purpose of back flushing the particle filter body 62, and ensure that the dust of the particle filter body 62 is cleaned in time; if cleaning is not needed, the compressed gas tank 1 does not deliver compressed gas to the back flushing pipe assembly 2, and the driving piece 32 drives the blocking piece 31 to block the exhaust hole 711. The soot cleaning device for a particle filter is adopted, and the problem that the dust in the particle filter cannot be cleaned in time in the prior art is effectively solved.

[0034] Wherein, the compressed gas in the compressed gas tank 1 is normal temperature compressed gas.

[0035] In some embodiments, the blocking piece 31 can be arranged as a blocking disc, wherein the diameter of the blocking disc is greater than the diameter of the exhaust hole 711, so as to ensure that the exhaust hole 711 is blocked; and the driving piece 32 and the blocking disc are drivingly connected, and the driving piece 32 drives the blocking disc to block or avoid the exhaust hole 711.

[0036] Specifically, the driving piece 32 comprises a mounting bracket 321 and a linear drive motor 322. The mounting bracket 321 is connected with the oxidation catalyst shell 71, and the linear drive motor 322 is mounted on the mounting bracket 321, wherein the linear drive motor 322 and the blocking disc are drivingly connected, so as to realize the purpose of driving the blocking disc to move linearly by the linear drive motor 322.

[0037] Optionally, the driving piece 32 comprises but is not limited to a hydraulic cylinder, a pneumatic cylinder and other linear motion devices.

[0038] Alternatively, the driving member 32 comprises a driving motor and a transmission structure, the driving motor is connected with the sealing member 31 through the transmission structure to drive the sealing member 31 to move linearly. The transmission structure comprises, but is not limited to, a ball screw mechanism, a gear and rack mechanism, etc.

[0039] In the embodiment, in order to control the compressed gas tank 1 to deliver compressed gas to the back blowing pipe assembly 2, the ash removal device for the particle filter further comprises an electromagnetic valve 4 arranged on the back blowing pipe assembly 2, and the electromagnetic valve 4 is used to control the on-off of the back blowing pipe assembly 2.

[0040] Further, the back blowing pipe assembly 2 comprises a connecting pipe 21 and a back blowing pipe 22 which are communicated with each other. One end of the connecting pipe 21 is communicated with the compressed gas tank 1, and the other end of the connecting pipe 21 is communicated with one end of the back blowing pipe 22, and the other end of the back blowing pipe 22 is inserted into the cavity of the particle filter shell 61, so that the back blowing pipe 22 can be used to back blow the particle filter body 62, thereby achieving the purpose of cleaning the dust in the particle filter body 62.

[0041] The back blowing pipe 22 has a plurality of back blowing holes which are arranged at intervals, and the plurality of back blowing holes are communicated with the cavity of the particle filter shell 61, so that the back blowing effect of the back blowing pipe 22 is further ensured.

[0042] In the embodiment, as shown in Fig. 2 The connecting pipe 21 comprises a first pipe body 211 and a second pipe body 212. One end of the first pipe body 211 is communicated with the compressed gas tank 1, the other end of the first pipe body 211 is communicated with one end of the electromagnetic valve 4, the other end of the electromagnetic valve 4 is communicated with one end of the second pipe body 212, and the other end of the second pipe body 212 is communicated with one end of the back blowing pipe 22. In this way, the on-off between the first pipe body 211 and the second pipe body 212 can be controlled by the electromagnetic valve 4.

[0043] Specifically, in order to improve the automation degree of the ash removal device for the particle filter, the ash removal device for the particle filter further comprises a controller 5. The electromagnetic valve 4 and the driving member 32 are electrically connected with the controller 5, the on-off of the electromagnetic valve 4 is controlled by the controller 5, and the driving member 32 is controlled to work by the controller 5.

[0044] Specifically, the controller 5 is an ECU (Electronic Control Unit), when the ECU detects that the pressure difference of the differential pressure sensor at both ends of the particulate filter main body 62 reaches a preset threshold (the pressure difference is greater than or equal to 45 kPa), the controller 5 controls the electromagnetic valve 4 to be powered on, the compressed gas enters the cavity of the particulate filter shell 61 through the channel of the electromagnetic valve 4, blows the particulate filter main body 62, and the controller 5 controls the linear drive motor 322 to drive the blocking piece 31 to avoid the exhaust hole 711, and finally the exhaust hole 711 is exhausted to the atmosphere. When the ECU detects that the pressure difference of the particulate filter main body 62 reaches a preset threshold (the pressure difference is less than 45 kPa), the controller 5 controls the electromagnetic valve 4 to be powered off, and the controller 5 controls the linear drive motor 322 to drive the blocking piece 31 to block the exhaust hole 711, thereby completing the dust removal of the particulate filter.

[0045] The embodiment also provides an engine exhaust system, which comprises a selective catalytic reduction device shell 81, a selective catalytic reduction device main body 82, a particulate filter shell 61, a particulate filter main body 62, an oxidation catalyst device shell 71, an oxidation catalyst device main body 72 and the dust removal device for the particulate filter in the above scheme, one end of the selective catalytic reduction device shell 81 is connected with the particulate filter shell 61, the selective catalytic reduction device main body 82 is located in the selective catalytic reduction device shell 81, the particulate filter main body 62 is located in the particulate filter shell 61, the other end of the particulate filter shell 61 is connected with the oxidation catalyst device shell 71, and the oxidation catalyst device main body 72 is located in the oxidation catalyst device shell 71.

[0046] The embodiment also provides a vehicle, which comprises the engine exhaust system in the above scheme. The vehicle adopts the utility model, the other end of the back blowing pipe assembly 2 is inserted into the cavity of the particulate filter shell 61 and located downstream of the particulate filter main body 62 along the exhaust gas flow direction, and the exhaust hole 711 is located upstream of the particulate filter main body 62 along the exhaust gas flow direction, so that when the particulate filter needs to be cleaned, the driving piece 32 drives the blocking piece 31 to avoid the exhaust hole 711, the compressed gas is delivered to the back blowing pipe assembly 2 through the compressed gas tank 1, so that the purpose of back blowing of the particulate filter main body 62 is realized, and the dust of the particulate filter main body 62 is cleaned in time; if the dust is not needed to be cleaned, the compressed gas tank 1 does not deliver the compressed gas to the back blowing pipe assembly 2, and the driving piece 32 drives the blocking piece 31 to block the exhaust hole 711. The vehicle of the utility model effectively solves the problem that the dust in the particulate filter cannot be cleaned in time in the prior art.

[0047] The utility model has the following advantages:

[0048] 1. A soot cleaning device for a particulate filter is designed;

[0049] 2. Normal temperature compressed gas back flushing is used as the soot cleaning medium;

[0050] 3. The pressure difference of the differential pressure sensor of the particulate filter is detected by the ECU, thereby controlling the on-off of the electromagnetic valve and the plugging or avoiding of the exhaust hole by the linear drive motor, and the automation degree is effectively improved.

[0051] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ash cleaning device for a particulate filter, characterized in that, The device comprises: a compressed gas tank (1); a backflush pipe assembly (2), one end of which is communicated with the compressed gas tank (1), the other end of which is inserted into the cavity of a particle filter housing (61) and located downstream of a particle filter body (62) along the exhaust gas flow direction, and the compressed gas tank (1) can provide compressed gas for the backflush pipe assembly (2); a blocking assembly (3) comprising a blocking piece (31) and a driving piece (32), the driving piece (32) is arranged on an oxidation catalyst housing (71), the oxidation catalyst has an exhaust hole (711) located upstream of the particle filter body (62) along the exhaust gas flow direction, and the driving piece (32) and the blocking piece (31) are drivingly connected to drive the blocking piece (31) to block or avoid the exhaust hole (711).

2. The soot cleaning device for a particulate filter according to claim 1, characterized by, The blocking piece (31) is a blocking disc, the diameter of the blocking disc is greater than the diameter of the exhaust hole (711), and the driving piece (32) and the blocking disc are drivingly connected to drive the blocking disc to block or avoid the exhaust hole (711).

3. The soot cleaning device for a particulate filter according to claim 2, characterized in that, The driving piece (32) comprises a mounting bracket (321) and a linear drive motor (322), the mounting bracket (321) is connected with the oxidation catalyst housing (71), and the linear drive motor (322) is mounted on the mounting bracket (321), and the linear drive motor (322) and the blocking disc are drivingly connected to drive the blocking disc to move.

4. The soot cleaning device for a particulate filter according to claim 1, characterized by, The device for the particle filter further comprises an electromagnetic valve (4) arranged on the backflush pipe assembly (2), and the electromagnetic valve (4) can control the on-off of the backflush pipe assembly (2).

5. The soot cleaning device for a particulate filter according to claim 4, characterized in that, The backflush pipe assembly (2) comprises a connecting pipe (21) and a backflush pipe (22) communicated with each other, one end of the connecting pipe (21) is communicated with the compressed gas tank (1), the other end of the connecting pipe (21) is communicated with one end of the backflush pipe (22), and the other end of the backflush pipe (22) is inserted into the cavity of the particle filter housing (61).

6. The soot cleaning device for a particulate filter according to claim 5, characterized by The backflush pipe (22) has a plurality of interval arranged backflush holes, and the plurality of backflush holes are communicated with the cavity of the particle filter housing (61).

7. The soot cleaning device for a particulate filter according to claim 5, characterized by The connecting pipe (21) comprises a first pipe body (211) and a second pipe body (212), one end of the first pipe body (211) is communicated with the compressed gas tank (1), the other end of the first pipe body (211) is communicated with one end of the electromagnetic valve (4), the other end of the electromagnetic valve (4) is communicated with one end of the second pipe body (212), and the other end of the second pipe body (212) is communicated with one end of the backflush pipe (22).

8. The soot cleaning device for a particulate filter according to claim 4, characterized by, The device for the particle filter further comprises a controller (5), the electromagnetic valve (4) and the driving piece (32) are electrically connected with the controller (5), the controller (5) controls the on-off of the electromagnetic valve (4) and controls the driving piece (32) to work.

9. An engine exhaust system characterized by, An exhaust system for an engine comprising a selective catalytic reduction housing (81), a selective catalytic reduction body (82) located within the selective catalytic reduction housing (81), a particulate filter housing (61), a particulate filter body (62) located within the particulate filter housing (61), an oxidation catalyst housing (71), an oxidation catalyst body (72) located within the oxidation catalyst housing (71), and the ash removal device for a particulate filter according to any one of claims 1-8, wherein one end of the selective catalytic reduction housing (81) and the particulate filter housing (61) are connected, the selective catalytic reduction body (82) is located within the selective catalytic reduction housing (81), the particulate filter body (62) is located within the particulate filter housing (61), the other end of the particulate filter housing (61) and the oxidation catalyst housing (71) are connected, and the oxidation catalyst body (72) is located within the oxidation catalyst housing (71).

10. A vehicle characterized by comprising: An exhaust system for an engine comprising the engine exhaust system according to claim 9.

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