JP2553273Y2 - Backwashing particulate collection equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting particulates contained in exhaust gas of an engine by a filter. More specifically, the present invention relates to a particulate collection device that separates collected particulates from the filter by forcibly blowing compressed air to the filter from downstream of the exhaust gas.

[0002]

2. Description of the Related Art As this type of particulate collecting apparatus, an inlet exhaust pipe 1a and an outlet exhaust pipe 1b are used as shown in FIG.
A particulate collection case 2 is interposed between the partition plate 2c and a partition plate 2c provided in a plane including the center line of the inlet exhaust pipe 1a in the case 2 and a lower portion in the case 2 in a horizontal direction. The inside of the case 2 is divided into a first filter chamber 2a, a second filter chamber 2b, a first particulate incinerator (not shown), and a second particulate incinerator (not shown) by a mesh plate (not shown). The first and second filters 3 are partitioned and are formed in the first and second filter chambers 2a and 2b.
It is known that a and 3b are accommodated respectively. This device comprises a first and a second filter 3a, 3b housed therein.
First and second exhaust gas inflow chambers 4a and 4b communicating with the inlet exhaust pipe 1a are formed in the upper case 2 and opposite to the surfaces of the first and second filters 3a and 3b facing the partition plate 2c. The first and second connecting pipes 5a and 5b communicating with the outlet exhaust pipe 1b are connected to the side surface, respectively. The first and second switching valves 6a, 6 are connected to the first and second connecting pipes 5a, 5b.
The first switching valve 6a communicates or shuts off the first filter chamber 2a and the outlet exhaust pipe 1b, and the second switching valve 6b communicates or shuts off the second filter chamber 2b and the outlet exhaust pipe 1b. It is supposed to. First and second connecting pipes 5
The first and second backwash nozzles 7a and 7b are inserted toward the first and second filter chambers 2a and 2b upstream of the first and second switching valves 6a and 6b of the first and second switching valves 6a and 6b. The first and second solenoid valves 8 are respectively provided on the second backwash nozzles 7a and 7b.
An air tank (not shown) is connected via a and 8b. The first and second particulate combustion chambers have the first
And second heaters 9a and 9b are respectively provided therein. In this device, the first switching valve 6a is opened as shown in FIG.
When the switching valve 6b is closed, the exhaust gas flowing into the case 2 from the inlet exhaust pipe 1a is discharged from the outlet exhaust pipe 1b through the first exhaust gas inflow chamber 4a, the first filter 2a, and the first connecting pipe 5a. At the same time, the second solenoid valve 8b is opened intermittently to blow compressed air to the second filter 3b,
The particulates are released from b, fall into the second particulate incineration chamber, and are incinerated by the second heater 9b.

[0003]

However, in the above device, since the first and second connecting pipes protrude outward on both sides of the particulate collecting case, the size of the first and second connecting pipes must be increased to secure a large mounting space. There was a defect. In addition, there is a problem that the weight increases as the size increases. SUMMARY OF THE INVENTION It is an object of the present invention to provide a backwashing type particulate collection device which requires a small mounting space and can be reduced in weight.

[0004]

The configuration of the present invention for achieving the above object will be described with reference to FIGS. 1 and 2 corresponding to an embodiment. The backwashing type particulate trapping device of the present invention is interposed between an inlet exhaust pipe 13 and an outlet exhaust pipe 14, and has a bottom cross section formed in a substantially V-shape. And the case 16 is provided in the case 16 in the vertical direction.
A partition plate 17 for partitioning into the first and second filter chambers 11 and 12 in a state where each upper edge is in contact with the partition plate 17 and each bottom surface is in contact with the inner bottom surface of the case 16; The side surfaces facing the partition plate 17 are particulate discharge surfaces 21a and 22a, respectively.
The side opposite to 22a is the exhaust gas inflow surface 21b,
22b, the first and second filters 21 and 22 having a rectangular parallelepiped shape having upper surfaces facing the inner top surface of the case 16 as exhaust gas discharge surfaces 21c and 22c, respectively, and the first and second filters housed therein.
Each lower end is connected to each upper edge of the filters 21 and 22 remote from the partition plate 17, and each upper end is connected to the inner top surface of the case 16 with an interval from the partition plate 17, and the first and second filter chambers 11 are connected. , 12 into first and second exhaust gas inflow chambers 41, 42 communicating with the inlet exhaust pipe 13 and first and second exhaust gas exhaust chambers 51, 52 communicating with the outlet exhaust pipe 14. , 32 and the particulate discharge surface 21
a, 22a and the case 1 along both sides of the partition plate 17.
6, first and second particulate discharge holes 61 and 62 formed at the bottom of the particulate discharge hole 6, respectively.
A particulate incineration case 18 which is fixed to the outer bottom surface of the case 16 and surrounds 1, 62, and in which a heater 19 is provided;
A switching valve 24 provided at the outlet exhaust pipe 14 and capable of switching exhaust gas flowing from the inlet exhaust pipe 13 into the collection case 16 to either the first filter chamber 11 or the second filter chamber 12; First and second reverse members that are disposed above the first and second filter chambers 11 and 12 through the top of the case 16 and that release the particulates collected by the first and second filters 21 and 22. This is provided with washing nozzles 71 and 72.

[0005]

The exhaust gas flowing into the collection case 16 from the inlet exhaust pipe 13 first enters the first exhaust gas inflow chamber 41 or the second exhaust gas inflow chamber 42, and then the first filter 21 exhaust gas inflow surface 2
The particulates in the exhaust gas enter the first filter 21 or the second filter 22 from the exhaust gas inflow surface 22b of the first filter 22 or the second filter 22, and are collected by the first filter 21 or the second filter 22. Further, the exhaust gas from which the particulates have been removed is discharged to the exhaust gas discharge surface 21 of the first filter 21.
c or the first filter 22 from the exhaust gas discharge surface 22 c of the second filter 22.
It is led to the exhaust gas discharge chamber 51 or the second exhaust gas discharge chamber 52,
It is discharged from the outlet exhaust pipe 14. The second backwash nozzle 7
Compressed air is blown from the second or first backwash nozzle 71 toward the second filter 22 or the first filter 21, and the particulates separated from the second filter 22 or the first filter 21 by the compressed air are blown into the second filter 22. From the particulate discharge surface 22 a of the first filter 21 or the particulate discharge surface 22 a of the first filter 21, it falls into the particulate incineration case 18 through the second particulate discharge hole 62 or the first particulate discharge hole 61. The particulates in the incineration case 18 are incinerated by the heater 19.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, the inlet exhaust pipe 13
A particulate collection case 16 is provided between the exhaust pipe 14 and the outlet. The collecting case 16 has an exhaust introduction case 16 a having one end connected to the downstream end of the inlet exhaust pipe 13.
And a case body 16b connected to the other end of the exhaust introduction case 16a (FIGS. 2 and 3). The upstream end of the inlet exhaust pipe 13 is connected to an exhaust manifold (not shown) of the engine. The exhaust gas introduction case 16a is formed in a substantially funnel shape that extends from the inlet exhaust pipe 13 toward the case body 16b (FIG. 2). The case main body 16b has a bottom cross section formed in a substantially V shape, and a top cross section formed in a substantially inverted V shape (FIG. 1). In a vertical plane including the center line L of the inlet exhaust pipe 13 in the case body 16b, a partition plate 17 formed by stacking two plates on each other is provided (FIGS. 1 and 3). The lower end of the partition plate 17 is welded to the deepest position on the bottom surface of the case body 16b, and the upper end of the partition plate 17 is welded to the highest position on the top surface of the case body 16b. Partition plate 1
7, the case body 16b is divided into the first and second filter chambers 1.
1 and 12 (FIG. 1).

The first and second filter chambers 11 and 12 accommodate first and second rectangular filters 21 and 22, respectively. The upper edges of the filters 21 and 22 facing each other are in contact with the partition plate 17, and the filters 21 and 22 are separated.
2 is stored so as to contact the inner bottom surface of the case body 16b. Here, the side surfaces of the first and second filters 21 and 22 facing the partition plate 17 are particulate discharge surfaces 21a and 22a, respectively, and the side surfaces opposite to the discharge surfaces 21a and 22a are exhaust gas inflow surfaces 21b and 22b, respectively. The upper surfaces facing the inner top surface of the case body 16b are referred to as exhaust gas discharge surfaces 21c and 22c, respectively. In addition, the first and second filters 21 and 22 are accommodated above the first and second filters 21 and 22, respectively.
The second partition walls 31 and 32 are provided at an interval from the partition plate 17. The lower ends of these partition walls 31 and 32 are connected to the other upper edges of the first and second filters 21 and 22, respectively, which are separated from the partition plate 17, and the upper ends of the partition walls 31 and 32 are spaced from the partition plate 17 by a case. Connected to the inner top surface of main body 16b. 1st filter room 1 by 1st partition 31
1 is a first exhaust gas inflow chamber 41 communicating with the inlet exhaust pipe 13
And a first exhaust gas discharge chamber 51 communicating with the outlet exhaust pipe 14, and the second filter chamber 12 is separated by the second partition 32 into a second exhaust gas inflow chamber 42 communicating with the inlet exhaust pipe 13 and an outlet exhaust pipe 14. It is partitioned into a second exhaust gas discharge chamber 52 that communicates. First and second particulate discharge holes 61 and 62 are formed along the both sides of the partition plate 17 at the bottom of the case body 16b facing the particulate discharge surfaces 21a and 22a of the first and second filters 21 and 22, respectively. (FIG. 1).
A particulate incineration case 18 is fixed to the outer bottom surface of the case body 16b so as to surround these particulate discharge holes 61 and 62, and a heater 19 is provided in the incineration case 18 (FIGS. 1 and 3).

[0008] Exhaust introduction case 16a of case body 16b
One end of a connecting pipe 23 is connected to the surface opposite to the surface to which the is connected, and the outlet exhaust pipe 14 is connected to the other end of the connecting pipe 23 via a switching valve 24. The switching valve 24 is a short pipe 24
a and a semi-disc-shaped valve element 24b rotatably incorporated in the short pipe 24a. The valve element 24b is driven by a valve drive motor 24d via a shaft 24c. Connecting pipe 23
One end is connected to the partition plate 17 and the other end is connected to the switching valve 2.
A flat plate 23a is provided in contact with the base end of the fourth valve body 24b, and the inside of the connecting pipe 23 is partitioned into two chambers by the flat plate 23a. The switching valve 24 shuts off either one between the first exhaust gas discharge chamber 51 and the outlet exhaust pipe 14 or between the second exhaust gas discharge chamber 52 and the outlet exhaust pipe 14. The case body 16b passes through the top and
And the second backwash nozzles 71 and 72 are respectively the first and second backwash nozzles.
It is inserted toward the filters 21 and 22 (FIGS. 2 and 3). The first and second backwash nozzles 71 and 72 are connected to an air tank (not shown) via first and second solenoid valves 81 and 82, respectively. The inlet exhaust pipe 13 is provided with a pressure sensor 26. The detection output of the pressure sensor 26 is connected to the control input of the controller 27 and the controller 2
7 is output from the valve drive motor 24 via the drive circuit 28.
d, connected to the first solenoid valve 81 and the second solenoid valve 82 (FIG. 2).

The operation of the thus constructed backwashing type particulate trapping apparatus will be described. As shown in FIG. 2, when the switching valve 24 shuts off the second filter chamber 12 and the outlet exhaust pipe 14 and communicates the first filter chamber 11 with the outlet exhaust pipe 14, the exhaust gas discharged from the engine is exhaust manifold. (Not shown) and into the first exhaust gas inflow chamber 41 through the inlet exhaust pipe 13 and into the first filter 21 from the exhaust gas inflow surface 21 b of the first filter 21. First filter 21
As a result, particulates in the exhaust gas are collected. The exhaust gas from which the particulates have been removed is guided from the exhaust gas discharge surface 21c of the first filter 21 to the first exhaust gas discharge chamber 51, and is discharged from the outlet exhaust pipe 14. At the same time, the controller 27 opens the second solenoid valve 82 intermittently and blows compressed air from the second backwash nozzle 72 toward the second filter 22, and the particulates separated from the second filter 22 by this compressed air The particles fall from the particulate discharge surface 22a of the second filter 22 to the particulate incineration case 18 through the second particulate discharge hole 62. At this time, the second filter chamber 12 communicates with the first filter chamber 11 via the second particulate discharge hole 62, the incineration case 18, and the first particulate discharge hole 61,
Since the area of the first and second particulate discharge holes 61 and 62 is extremely small with respect to the opening area of the opening facing the case body 16b of the incineration case 18, the second filter 22 in the second filter chamber 12 is instantaneously removed. The blown compressed air hardly reaches the first filter chamber 11. The particulates accumulated in the incineration case 18 are incinerated by the heater 19.

When the pressure sensor 26 detects the pressure in the inlet exhaust pipe 13 which is equal to or higher than a predetermined value, the controller 27 drives a valve drive motor 24d to drive the valve body 24b of the switching valve 24.
Is rotated in the direction of the two-dot chain line arrow in FIG. 2 to shut off the first filter chamber 11 and the outlet exhaust pipe 14, and
2 and the outlet exhaust pipe 14 are communicated. At this time, the particulates in the exhaust gas of the engine are collected by the second filter 22, and the particulates collected by the first filter 21 are intermittently opened by the first solenoid valve 81 to be discharged from the first backwash nozzle 71. The first filter 21 is separated by compressed air blown toward the first filter 21.

[0011]

As described above, according to the present invention, the exhaust gas flowing from the inlet exhaust pipe to the collection case passes through the exhaust gas inflow chamber, the exhaust gas inflow surface of the filter, the exhaust gas discharge surface of the filter, and the exhaust gas exhaust chamber. The particulates discharged from the outlet exhaust pipe and separated from the filter fall from the particulate discharge surface through the particulate discharge holes into the particulate incineration case. It can be installed in a small installation space. In addition, the weight can be reduced with miniaturization.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2 showing a backwashing type particulate collecting apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG. 3;

FIG. 3 is a sectional view taken along line CC of FIG. 2;

FIG. 4 is a cross-sectional view showing a conventional example and corresponding to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 1st filter room 12 2nd filter room 13 Inlet exhaust pipe 14 Outlet exhaust pipe 16 Particulate collection case 17 Partition plate 18 Particulate incineration case 19 Heater 21 1st filter 21a, 22a Particulate discharge surface 21b, 22b Exhaust gas inflow Surface 21c, 22c Exhaust gas discharge surface 22 Second filter 24 Switching valve 31 First partition 32 Second partition 41 First exhaust gas inflow chamber 42 Second exhaust gas inflow chamber 51 First exhaust gas discharge chamber 52 Second exhaust gas discharge chamber 61 First party Cured discharge hole 62 Second particulate discharge hole 71 First backwash nozzle 72 Second backwash nozzle

Claims (1)

(57) [Scope of request for utility model registration] 1. A particulate collection case (16) interposed between an inlet exhaust pipe (13) and an outlet exhaust pipe (14) and having a substantially V-shaped bottom cross section. The case (1) is provided in the case (16) in a vertical direction.
Partition plate for partitioning 6) into first and second filter chambers (11, 12)
(17), the upper edges of the partition plate (17) are in contact with each other, and the case (16)
The first and second filter chambers (11, 12) are accommodated in a state in which each bottom surface is in contact with the inner bottom surface, and the side surfaces facing the partition plate (17) are each a particulate discharge surface (21a, 2a).
2a), the side surface opposite to the discharge surface (21a, 22a) is an exhaust gas inflow surface (21b, 22b), and the upper surface facing the inner top surface of the case (16) is the exhaust gas discharge surface (21c, 22c), respectively. ), The first and second filters (21, 22) having a rectangular parallelepiped shape, and the lower ends of the first and second filters (21, 22) accommodated in the upper edges of the first and second filters (21, 22) separated from the partition plate (17). Are connected, and each upper end of the case (16) is spaced from the partition plate (17).
The first and second filter chambers (11, 1) are connected to the inner top surface.
2) first and second exhaust gas inflow chambers (41, 42) communicating with the inlet exhaust pipe (13) and first and second exhaust gas exhaust chambers (51, 52) communicating with the outlet exhaust pipe (14). First and second partition walls (31, 32), which are formed at the bottom of the case (16) along both sides of the partition plate (17), facing the particulate discharge surfaces (21a, 22a). The first and second particulate discharge holes (61,
62), a particulate incineration case (18) which is fixed to the outer bottom surface of the case (16) and surrounds the particulate discharge holes (61, 62), and in which a heater (19) is provided; and (14), and guides exhaust gas flowing from the inlet exhaust pipe (13) to the collection case (16) to either the first filter chamber (11) or the second filter chamber (12). A switchable switching valve (24); and a first and a second through a top of the collection case (16).
First and second backwash nozzles (71, 72) disposed above the filter chambers (11, 12) and releasing particulates collected by the first and second filters (21, 22); Exhaust gas flowing into the collection case (16) from the inlet exhaust pipe (13) is supplied to the first exhaust gas inflow chamber (41) or the second exhaust gas inflow chamber (42) of the first filter (21). Exhaust gas inflow surface (21b) or exhaust gas inflow surface (22b) of second filter (22), exhaust gas discharge surface (21c) or second filter (22) of first filter (21)
The exhaust gas is discharged from the outlet exhaust pipe (14) through the exhaust gas discharge surface (22c), the first exhaust gas discharge chamber (51) or the second exhaust gas discharge chamber (52), and the separated particulates are collected by the first filter. (twenty one)
Particulate discharge surface (21a) or second filter (22)
From the particulate discharge surface (22a) of the first particulate discharge hole (61) or the second particulate discharge hole (6).
A backwashing type particulate collection device, characterized in that it is configured to fall into the incineration case (18) through 2).