JPH0710411U - Filter block for particulate collection - Google Patents

Abstract

(57) [Abstract] [Purpose] High accuracy is not required when assembling the particulate trap, and no jigs and tools are required for excellent assembly workability. Improves exhaust gas sealing performance. [Structure] An upper groove 11c and a lower groove are formed at the upper edge and the lower edge of the rectangular parallelepiped filter block body 11, respectively.
The rope-shaped sealing material 12 having a diameter larger than the depth or width of the upper groove and the lower groove is arranged in the upper groove and the lower groove of the block body. The block cover 13 made of metal is the sealing material 12.
To the upper groove and lower groove to fix. Block cover 1
3 covers the three sides of the block body 11 and the remaining 1
An exhaust outlet opening 13a is formed on one surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter block that collects particulates contained in engine exhaust gas. More specifically, the present invention relates to a cross flow type filter block in which exhaust gas flows in the block at right angles.

[0002]

[Prior art]

 As shown in FIG. 4, in the conventional filter block 1 of this kind, a filter plate 1a made of a plurality of ceramic porous bodies is separated by a filter bonding material (not shown) so as to form an exhaust outlet slit 1e. It is made by joining and opening. The filter plate 1a is formed with a plurality of exhaust inlet holes 1d penetrating in the vertical direction. In the particulate trap device using this filter block 1, six filter blocks 1 are arranged together. A main body frame 3 is laid around the upper and lower edges of each of the six blocks 1 through a sealing material 2 made of ceramic fiber. The upper and lower main body frames 3 integrally form the six filter blocks 1. Fixed.

The entire assembly is covered with a top cover 4, a side cover 5 and a bottom cover 6. An exhaust gas inlet pipe 7 is connected to the cover so that the exhaust gas A flows into the space between the upper surface cover 4 and the upper surface of the block 1. Reference numeral 8 denotes an exhaust outlet pipe, which is connected to the cover so as to allow the exhaust gas B discharged into the space between the side cover 5 and the side surface of the block 1 to flow out. The inside of the bottom cover 6 constitutes a soot reservoir.

[0004]

[Problems to be solved by the device]

 However, in order to securely fix the multiple filter blocks together in the main body frame, high accuracy is required in the dimensions of the filter block, the main body frame, and the seal material, and the seal material is required when the main body frame is assembled. A large jig and tool were required to compress the slab by a predetermined amount. In addition, since the sealing material has a relatively narrow width, the sealing material came off the main frame due to exhaust gas during use, and the durability of the sealing material was insufficient. Further, there is a problem that the filter block is easily damaged by an impact when it is transported.

An object of the present invention is to provide a filter block for collecting particulates, which does not require high accuracy when assembling the particulate collecting apparatus and which does not require a jig or a tool and has excellent assembling workability. Especially. Another object of the present invention is to provide a filter block for collecting particulates which is free from damage during transportation and has a good exhaust gas sealing property for a long period of time.

[0006]

[Means for Solving the Problems]

 A configuration of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The particulate trapping filter block 10 of the present invention comprises a rectangular parallelepiped filter block body 11 having an upper groove 11c and a lower groove formed at the upper and lower edges, respectively, and the depth or width of the upper groove 11c and the lower groove. The rope-shaped sealing material 12 having a large diameter and arranged in the upper groove and the lower groove, and the sealing material 12 is pressed and fixed to the upper groove and the lower groove to cover the three side surfaces of the block main body 11 and the remaining one It is provided with a metal block cover 13 having an exhaust outlet opening 13a on its side surface.

[0007]

[Action]

 Since the three sides of the filter block body 11 are covered with the block cover 13, the filter block 10 can be treated like a metal part, the block body 11 can be protected, and a plurality of blocks 10 can be assembled by welding. Become. Since the rope-shaped sealing material 12 is fixed to each block body 11 by the cover 13, high sealing performance of exhaust gas can be obtained for a long period of time.

[0008]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the particulate trapping filter block 10 of this embodiment includes a rectangular parallelepiped filter block body 11, a rope-shaped sealing material 12, and a block cover 13. The block body 11 is made by arranging a plurality of filter plates 11a made of a porous ceramic body with a filter bonding material 11b interposed therebetween and bonding them. When the arrangement direction of the filter plates 11a is horizontal, the filter plate 11a is provided with a plurality of exhaust inlet holes 11d penetrating in the vertical direction. An exhaust outlet slit 11e is formed between the plurality of filter plates 11a by the filter bonding material 11b. Although not shown, the filter bonding material is also provided below the filter plate 11a.

An upper groove 11c and a lower groove (not shown) are formed at the upper and lower edges of the block body 11, respectively. The lower groove is formed to have the same shape and size as the upper groove 11c. In this example, the upper groove 11c and the lower groove are provided on the upper and lower portions of the four side surfaces of the block body 11, and the inner surface of the groove is formed into a curved surface, respectively. A rope-shaped sealing material 12 having a diameter larger than the depth and width of the upper groove 11c and the lower groove is arranged in the upper groove 11c and the lower groove. The rope-shaped seal material 12 is formed by knitting heat-resistant alloy fibers in a rope shape with a sleeve-shaped cover made of glass fibers or ceramic fibers. In addition to this, it is possible to use a material woven into a rope by using only ceramic fiber or glass fiber. These seal materials have not only heat resistance but also appropriate elasticity, so that they have excellent sealing properties.

A side surface of the block body 11 is covered with a block cover 13 made of stainless steel in a state where the sealing material 12 is arranged in the upper groove and the lower groove. That is, the cover 13 is composed of two bodies each having a U-shaped cross section, and they are integrated by surrounding the block body 11 and welding them together. Reference numeral 20 is a welding point. The block cover 13 is fixed to the upper groove 11c and the lower groove with the block cover 13 integrated by welding, covers three side surfaces of the block body 11, and has an exhaust outlet opening 13a on the remaining one side surface. . The opening 13a has a size such that all the slits 11e provided on the side surface of the block body 11 appear. The inner surface of the seal member contact portion 13b of the block cover 13 is a concave curved surface for securely fixing the rope-shaped seal member 12.

Since the filter block 10 configured in this way has three sides of the block body 11 covered with the block covers 13, it can be handled in the same manner as metal parts, and the damage to the block body 11 during transportation is greatly reduced. To be done. At the same time, the plurality of filter blocks 10 can be assembled by welding to the fixed frame 19 shown in FIG. As a result, the assembly can be easily automated. In addition, since the rope-shaped sealing material 12 is wound around the upper and lower edges of the block body 11 and is firmly fixed by the upper groove, the lower groove and the contact portion 13b, it has excellent exhaust gas sealing performance and can be used for a long period of time. The seal material 12 does not fall out.

As shown in FIG. 2, a particulate trapping device 30 is made by arranging the above six particulate trap filter blocks 10 together. That is, the six filter blocks 10 are fixed to the two upper and lower block fixing frames 19 by welding and integrated. The area inside one frame of the fixed frame 19 corresponds to the upper surface area and the lower area of the block 10. The six filter blocks 10 fixed by the fixing frame 19 are wholly covered by the top cover 14, the side covers 15, and the bottom cover 16 similarly to the filter block 1 shown in FIG. When fixing with the fixing frame 19, the six blocks 10 are arranged so that the side surface of the filter block body 11 not covered with the cover 13 faces the side surface cover 15. An exhaust gas inlet pipe 17 is connected to the cover so that the exhaust gas flows into the space between the upper surface cover 14 and the upper surface of the block 10. Reference numeral 18 denotes an exhaust outlet pipe, which is connected to the cover so as to allow the purified exhaust gas discharged into the space between the side cover 15 and the side surface of the block 10 to flow out. The inside of the bottom cover 16 constitutes a soot reservoir.

As shown in FIG. 3, the exhaust outlet pipe 18 is provided with a backwash nozzle 22 toward the side surface of the block 10, and the pipe 18 on the exhaust gas downstream side of the backwash nozzle 22 is provided with a motor 23. An on-off valve 24 that is driven is provided. The backwash nozzle 22 is connected to an air tank (not shown) via a pneumatic tube 25. A switching valve 26 is provided in the pneumatic tube 25. The exhaust outlet pipe 18 is connected to an exhaust pipe (not shown) via a merging pipe 27. Reference numeral 28 denotes a heater, which is arranged in the soot storage portion inside the bottom cover 16 shown in FIG.

The operation of the particulate trap device 30 having such a configuration will be described. First, when the exhaust gas A containing the particulates of the engine flows in from the exhaust inlet pipe 17, the exhaust gas A is guided by the top cover 14 and enters the exhaust inlet hole 11d of the filter block 10, passes through the filter plate 11a, and exits the slit 11e. pass. The purified exhaust gas B that has passed through the slit 11e is guided by the side cover 15 and is discharged to the atmosphere through the pipes 18 and 27 and the exhaust pipe. At this time, particulates are collected on the inner wall of the exhaust inlet hole 11d.

When the collected particulates deposit on the inner wall of the exhaust gas inlet hole 11d by a predetermined amount, one controller valve (not shown) opens one opening / closing valve 24 and one switching valve 26 is closed, while the other opening / closing valve is opened / closed. The valve 24 is closed, the other switching valve 26 is opened, and the other backwash nozzle 22 injects high pressure air to the three filter blocks 10 on one side to collect the particulates adhering to the inner wall surface of the exhaust gas inlet hole 11d. It is made to fall to the part and burned there by the heater 28. After incineration, one on-off valve 24 is closed this time, one switching valve 26 is opened, the other on-off valve 24 is opened, the other switching valve 26 is closed, and one backwash nozzle 22 causes high pressure air to flow. Is sprayed onto the other three filter blocks 10 on one side, and the particulates adhering to the inner wall surface of the exhaust gas inlet hole 11d are dropped into the soot reservoir, where they are burned by the heater 28.

The structure of the block main body of the present invention is an example, and if the block main body is of a type that flows into the exhaust gas inlet hole from above and is withdrawn laterally, it is the structure shown in the above example. Not limited.

[0017]

[Effect of device]

 As described above, according to the present invention, the filter block body, the sealing material, the body frame, etc. have conventionally been required to have high dimensional accuracy and the workability of assembling a plurality of filter blocks has been poor. Since each block is covered with a block cover, the filter block can be treated in the same way as metal parts. As a result, the filter block body is protected from external force, and a plurality of filter blocks can be assembled by welding. In particular, by making the sealing material into a rope shape and sandwiching it between the upper groove and the lower groove and the block cover for each block body, the sealing material does not fall out even if it is used for a long time, and high sealing performance is maintained.

[Brief description of drawings]

FIG. 1 is a fragmentary perspective view of a filter block for collecting particulates according to an embodiment of the present invention.

FIG. 2 is a perspective view of a particulate collection device in which a plurality of filter blocks are assembled.

FIG. 3 is a plan view of the particulate trap device with the top cover of FIG. 2 omitted.

FIG. 4 is a perspective view of a conventional particulate trapping device corresponding to FIG.

[Explanation of symbols]

 10 Filter Block for Particulate Collection 11 Filter Block Main Body 11a Filter Plate 11b Filter Bonding Material 11c Upper Groove 11d Exhaust Inlet Hole 11e Exhaust Outlet Slit 12 Rope-like Sealing Material 13 Block Cover 13a Exhaust Outlet Opening

Claims (1)

[Scope of utility model registration request] 1. A rectangular parallelepiped filter block body (11) having an upper groove (11c) and a lower groove formed on the upper edge and the lower edge, respectively.
And a rope-shaped sealing material (1) formed to have a diameter larger than the depth or width of the upper groove (11c) and the lower groove and arranged in the upper groove and the lower groove.
2) and the sealing material (12) is pressed and fixed to the upper groove and the lower groove to cover the three side surfaces of the block body (11), and the remaining one side surface is provided with an exhaust outlet opening (13a). A filter block for collecting particulates, comprising a block cover (13) made of metal having