KR101000851B1 - Filter for exhaust fumes-purifying apparatus - Google Patents

Abstract

The present invention relates to a filter for an exhaust gas purification device, which is configured to suppress deformation due to heat supplied from a combustion device.

Exhaust gas purifier filter according to an embodiment of the present invention comprises a plurality of filtration member is composed of a plurality of layers, the filtration unit configured to be spaced apart from each other for the region for filtration; It may be configured to include; the gap holding member is coupled to the end of any one or more filtering members arranged in the direction in which the combustion heat is introduced, the at least one end is not fixed or in contact with the end of the other filtering member. .

By the above configuration, the present invention can minimize the permanent deformation of the filtration device due to thermal expansion and / or contraction caused by the operation of the combustion device, and the collection efficiency of the smoke decreases due to the deformation and / or the filter. Can prevent damage.

Exhaust gas, filter, thermal expansion, heat shrinkage, deformation, efficiency, spacing

Description

Filter for exhaust gas purification device {FILTER FOR EXHAUST FUMES-PURIFYING APPARATUS}

The present invention relates to a filter for an exhaust gas purifier configured to suppress deformation of the filter by heat supplied from a combustion device for oxidation of soot collected in the filter.

In general, a diesel engine has advantages of high thermal efficiency and excellent durability, but a large amount of particulate matter (PM) and nitrogen oxides (NOx) are emitted. Such particulate matter and nitrogen oxides cause air pollution. Particularly, particulate matter has a high adsorption rate to the respiratory system and is very harmful to the human body. However, as the proportion of particulate matter and nitrogen oxides released due to the increase of diesel vehicles has recently increased, it has become a social problem.

In recent years, in order to solve such a problem, attachment of a soot post-treatment apparatus etc. is required. Recently, in order to remove particulate matter, a diesel particulate filter (DPF) has been developed to remove particulate matter. It is being removed.

However, the DPF can collect particulate matter in the diesel engine exhaust gas and reduce its discharge amount. However, as the use time elapses, the DPF has a problem that the filter part is clogged due to the increase of particulate matter trapped in the filter part. In addition, the trapped particulate matter causes the filter to be clogged or the collected particulate matter increases, so that the pressure of the exhaust gas increases, which causes a negative pressure of the engine, resulting in a problem of deterioration of the engine performance. Doing.

In order to solve this problem, a regeneration method has been proposed to remove the soot trapped in the filter to make the filter initial state. A heating method has been proposed. In the case of such a heating method, as shown in FIG. 1, the exhaust gas introduced through the inlet 10 and purified by the filter 20 is discharged through the discharge unit 30, and the filtration unit ( The inlet 10 is provided with a combustion device 11 for the oxidation of the soot collected by 21.

In this case, the filtering member 21b which comprises the filtration part 21, the sealing part 21a couple | bonded with the edge part of the filtration member 21b, and the filtration part 21 can be filtered inside the filter main body 20a. The support member 22 to be disposed at the position causes thermal expansion and contraction occurring during heating and cooling by the heat supplied by the combustion device 11. Due to such thermal expansion and contraction, the filtration unit 21 is deformed as shown in FIG. 2. Particularly, in order to oxidize the soot, heating and cooling of the filtration device 20 occur repeatedly according to the collection degree of the soot or according to a set time, which causes the filtration unit 21 and the support member 22 to be removed. Deformation becomes more severe.

When deformation occurs in the filtration unit 21 and the support member 22 as illustrated in FIG. 2, structural deformation of the filtration member 21b tissue is induced, resulting in uneven collection of soot or collection efficiency. There is a problem of deterioration. For example, in some areas of the filtration member 21b (for example, the folded or tight parts), the collection is not performed well, and in some other areas (for example, the area where the filtration tissue is stretched), the relative collection phenomenon is not observed. Sometimes the same problem occurs. On the other hand, due to the local collection phenomenon, a relatively high heat of oxidation is generated in the local region of the filtering member during the oxidation process of the collected soot, causing a problem of damage and / or breakage of the filtering member.

On the other hand, conventionally, since there is no means for maintaining a constant interval between the entire region of each filtration member consisting of a plurality of layers constituting the filter, due to deformation such as contacting or distorting some regions during thermal expansion and / or thermal contraction There is a problem that the collection of soot is uneven or the efficiency is lowered.

The present invention is made by recognizing at least one of the needs or problems occurring in the conventional filter for exhaust gas purification apparatus as described above.

One object of the present invention is to minimize permanent deformation due to thermal expansion and / or contraction occurring in the filter by the operation of the combustion device.

Another object of the present invention is to ensure that even when the filter is thermally expanded and contracted by the combustion device, the gap between the filtration members constituting the filter is maintained to the maximum, thereby preventing the collection efficiency from being lowered as much as possible.

Another object of the present invention is to ensure that even when the filter is thermally expanded and contracted by the combustion device, the surface of the filtration member constituting the filter is kept as uniform as possible to prevent the collection efficiency from being lowered as much as possible.

Another object of the present invention is to improve the configuration of the filter and / or the support provided to secure the filter to minimize the thermal deformation caused by the combustion device, and to minimize the deformation of the filter caused by the deformation of the support will be.

Yet another object of the present invention is to prevent the filter from being damaged and / or broken due to stress caused by thermal expansion and / or contraction by the operation of the combustion device.

Another object of the present invention is to spread the heat of combustion to the entire area of the filter provided to collect the soot to minimize the thermal deformation of the filter and / or support, and to provide the most uniform heat distribution over the entire area of the filtration member To make it happen.

An exhaust gas purification device filter according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically based on being configured to minimize deformation and / or breakage of the filter due to thermal expansion and / or contraction caused by the heat supplied for oxidation of the soot trapped in the filter.

Exhaust gas purifier filter according to an embodiment of the present invention comprises a plurality of filtration member consisting of a plurality of layers, the filtration unit is configured in a state in which the regions for filtration are spaced apart from each other; It may be configured to include; the gap holding member is coupled to the end of any one or more filtering members arranged in the direction in which the combustion heat is introduced, the at least one end is not in contact with the end of the other filtering member.

In this case, the filtration part may be configured such that a plurality of filtration members having a cylindrical shape are engaged in a structure in which both ends thereof are staggered by the sealing part to be sealed. On the other hand, the gap retaining member may be coupled to any one or more sealing parts arranged in the direction in which the heat of combustion flows. In this case, the spacing member may be configured such that at least one end thereof is not in contact with the end of the other sealing portion. And, each seal may be formed with one or more holes.

On the other hand, each filtration unit may be further provided with at least one support member disposed inside the filter body to be fixed to the filter body. In this case, the support member may be configured such that one surface is coupled to an end portion of the filter portion disposed in a direction in which combustion heat is introduced without interfering with the gap holding member, and one end portion is coupled to any one position inside the filter body. . In this case, the support member may be provided so as not to interfere with the spacing member. In addition, the support member may have a structure in which a rectangular plate is bent at a central portion thereof in the longitudinal direction.

On the other hand, the spacing member may be made of a structure in which the rectangular plate is bent in the longitudinal direction, in this case, the central portion in the longitudinal direction is formed with a mounting groove coupled to the end of any one filtering member, both ends are It may be configured to have a spaced distance from the end of the other filtering member.

In this case, the spacing member may be further formed with a slit at one or more ends in the longitudinal direction. On the other hand, the spacing member may be configured to be relatively longer than the region of the other end of the one end area around the mounting groove.

In addition, the gap holding member may be further disposed between two sealing portions of the filtration member, and each end portion is coupled to the sealing portion. In this case, the spacing member may be formed of a structure in which the center portion is bent.

On the other hand, each of the gap holding member and the support member may be arranged radially at intervals of 90 to 120 degrees.

The filter unit may further include at least one support member having one surface coupled to an end positioned at the discharge side and having one end coupled to any one position within the filter body. In this case, the support member may be configured such that one surface is coupled to the end of the filter, and one end is coupled to any one position within the filter body.

On the other hand, it may be further provided with a coil-shaped spacing member disposed between at least any two filtering members configured to prevent contact between the two filtering members or to maintain the shape of the filtering member. In this case, the coil-shaped spacing member may be formed in the form of a coil pressed so that the bodies to be wound overlap each other. In addition, the coil-shaped spacing member may be arranged to be coupled to the end of the filtering portion by one or more position fixing parts and wound around the central outer surface position of each filtering member.

On the other hand, the filter portion may be further provided with a diffusion plate at one or more end positions of the exhaust gas inlet side end or the exhaust gas outlet side end. In this case, the filtration unit may be further provided with a slit at a position corresponding to the upper position of the support member of the diffusion plate provided at the discharge end side.

As described above, according to the present invention, it is possible to minimize the permanent deformation of the filter due to thermal expansion and / or contraction caused by the operation of the combustion device.

Further, according to the present invention, even when the filter is thermally expanded and contracted by the combustion device, the gap between the filtration members constituting the filter is maintained to the maximum, thereby preventing the collection efficiency from being lowered to the maximum.

In addition, according to the present invention, even when the filter is thermally expanded and contracted by the combustion device, the surface of the filtration member constituting the filter is maintained as uniform as possible, thereby preventing the collection efficiency from being lowered as much as possible.

In addition, according to the present invention, it is possible to minimize the thermal deformation caused by the combustion apparatus with the improved support, and to minimize the deformation of the filter caused by the deformation of the support.

In addition, according to the present invention, it is possible to prevent the filter from being damaged and / or broken as much as possible due to the stress caused by thermal expansion and / or contraction caused by the operation of the combustion device.

In addition, according to the present invention, the heat of combustion is diffused to the entire area of the filter provided to collect the soot to minimize the thermal deformation of the filter and / or the support, the heat distribution is as uniform as possible over the entire area of the filtration member Can be lost.

In order to help understand the features of the present invention as described above, it will be described in detail with respect to the filter for the exhaust gas purification apparatus according to the embodiment of the present invention.

Hereinafter, exemplary embodiments will be described based on embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, It is to be understood that the present invention may be implemented as illustrated embodiments. Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention. In order to facilitate understanding of the embodiments to be described below, in the reference numerals shown in the accompanying drawings, among the constituent elements which perform the same function in each embodiment, the related constituent elements are indicated by the same or an extension line number.

Embodiments related to the present invention are basically based on being configured to minimize deformation and / or breakage of the filter due to thermal expansion and / or contraction caused by heat supplied for oxidation of the soot trapped in the filter.

3 shows an example of one configuration of the support member 122 for mounting the filtration unit 121 provided in the exhaust gas purifier filter 120 to the filter main body 120a. As described below, the support member 122 allows the filtration unit 121 to be disposed at a predetermined position inside the filter main body 120a, and the filtration member 121b constituting the filtration unit 121 is a filter. Coupling is performed with the filter body 120a and the filtration unit 121 to be arranged at regular intervals from the inner surface of the body (120a). The support member 122 may be made of a reinforced structure to prevent deformation that does not maintain its original shape due to thermal deformation (especially, thermal expansion) and is not bent or distorted.

For example, the support member 122 may have a structure in which a rectangular play is bent about a central portion in the longitudinal direction as shown. Alternatively, the support member 122 may have a structure in which a cross-sectional structure is provided with a semicircular or polygonal bent portion. Due to this structure, when the support member 122 is inflated and contracted in the longitudinal direction, the support member is deformed due to the deformation of the filter unit 121 in which a force is provided in a direction opposite to the expansion and contraction direction of the support member 122. It is possible to prevent the shape of the longitudinal direction of the 122 from being deformed (for example, deformed or warped). Through the improved reinforcing structure of the support member 122, it is possible to prevent the shape of the filtration unit 121 from being temporarily or permanently deformed, thereby preventing the collection efficiency of the filtration unit 121 from being lowered. You can do it.

4A to 4C may be provided with a gap maintaining member according to each embodiment applied to maintain the gap between the filtration member 121b constituting the filtration unit 121. The spacing members according to the above embodiments may be applied to the filtration unit 121 so that the spacing of the filtration members 121b can be maintained only by the spacing members according to any one example, or some of these embodiments. Alternatively, all of them may be applied to the filtration unit 121 to maintain the interval of the filtration member 121b.

The gap maintaining member may be configured to have a structure similar to that of the support member 12. For example, as illustrated in FIG. 4A, the space maintaining member 123 according to the first example may have a structure in which a rectangular plate is bent around a central portion in a longitudinal direction, and the mounting groove ( 123a may be formed to be attachable to an end portion of the filtration member 121b (or an end portion of the sealing portion 121a when the sealing portion 121a is provided) constituting the filtration portion 121. By such a configuration, the space maintaining member 123 according to the first example may be configured to be mounted at one end of the filtering member 121b or the sealing unit 121a constituting the filtering unit 121. And, both ends of the gap holding member 123 is a filtering member 121b or a sealing portion which is located inside and / or outside of the filtration member 121b or the sealing portion 121a on which the gap holding member 123 is mounted. It may be applied in a state in which it is spaced apart from or coupled to 121a.

The interval maintaining part 123 according to the first example may further include a slit 123b in an end region of the longitudinal direction. Due to the formation of the slit 123b, due to the thermal expansion or contraction due to the resistance generated between the longitudinal end portion of the gap maintaining member 123 and the filtering member 121b or the sealing portion 121a of either side ( 121b) or the deformation of the sealing portion 121a can be minimized.

On the other hand, as shown in Figure 4b, the spacing member 124 according to the second example is a rectangular plate is bent around the central portion in the longitudinal direction as in the case of the spacing member 123 according to the first example It may be made of a structure, the mounting portion 124a may be formed in the central position. On the other hand, the interval maintaining member 124 according to the second example may be configured to have a different length of the left and right ends around the mounting groove (124a).

By such a configuration, the gap maintaining member 124 according to the second example may be configured to be mounted at the end of the outermost filtering member 121b or the sealing part 121a. In this case, the relatively short end portion may be disposed to face the inner surface of the filter body 120a. In this case, the spacing member 124 according to the second example is the slit 124b as in the case of the spacing member 123 of the first example at the position of the end portion facing the filtration member 121b or the sealing portion 121a. This may be further formed.

On the other hand, as shown in Figure 4c, the spacing member 125 according to the third example is a rectangular plate bent around the central portion in the longitudinal direction as in the case of the spacing member 123 according to the first example It can be made of a structure. In this case, the interval maintaining member 125 according to the third example is disposed between the filtration member 121b or the sealing portion 121a so that one end or both ends thereof are respectively the filtering member 121b or the sealing portion 121a. It may be coupled to the side of). On the contrary, the gap maintaining member 125 according to the third example is disposed between the filtration member 121b or the sealing part 121a and the filter main body 120a so that one end or both ends thereof are each filtering member 121b. Or it may be configured to be coupled to the sealing portion 121a and the filter body (120a).

5A illustrates an example in which the filtration unit 121 is applied to the filter main body 120a by the support member 122 and the space maintaining members 123, 124, and 125 according to each example.

On the other hand, as an example of the configuration of the filtration unit 121, the filtration member 121b is made of a structure in which a plurality of cylindrical filtration member 121b is overlapped and sealed in a state where each end is crossed by the sealing portion (121a) Thus, the end portion of the filtration member 121b may have a structure in which an end portion thereof may be connected (sealed) by the sealing portion 121a so that the cross-sectional structure of each filtration member 121b is zigzag. By this structure, the filtration member 121b may have a structure in which the filtration area is extended. On the other hand, the filtering member 121b may be made of a structure of a metal fiber mat. On the other hand, the filtering member 121b may be formed in a cylindrical shape in which one end is closed and arranged in a manner that is positioned inside the filtering member 121b of a relatively small size to overlap. In this case, when the filtration member 121b has a structure of a metal fiber mat, a sealing portion 121a is further provided at the opening side end of the filtration member 121b, so that the gap and / or shape of the filtration member 121b of the opening is changed. It can also be kept constant. As described above, when the filtration member 121b has a structure of a metal fiber mat, the filtration member 121b may be formed of a fiber mat structure disclosed in Patent No. 0705707 published by the present applicant.

In the illustrated example, the filtration unit 121 is an example that the sealing portion 121a is provided at the end of the filtration member 121b.

In this case, as shown in FIGS. 5A and 5B, the support part 122 may be disposed on the sealing part 121a and fixed to the sealing part 121a to be coupled to each other. One end of the 122 may be coupled to the filter body 120a. In this case, the support part 122 may be coupled to each of the sealing parts 121a and the filter body 120a by a welding method (A and A ′ regions in the drawing), or by another coupling method or coupling means. It may be done.

The support part 122 may be configured to be disposed at a plurality of places to fix the filter part 121 to the filter body 120a, or as shown in the figure, the filter part due to thermal expansion or contraction ( It is also possible to minimize the deformation of 121).

Meanwhile, as illustrated in FIGS. 5A and 5C, the space keeping members 123, 124, and 124 according to each of the above examples may filter one or more filtration so that the space of each filtration member 121b constituting the filtration unit 121 may be maintained. It may be mounted at the end of the member 121b or at the seal 121a (shown to be mounted on the seal in the drawing).

For example, the gap maintaining member 124 according to the second example may be coupled to the sealing part 121a disposed at the outermost side as shown, in which case, the mounting groove 124a is the sealing part 121b. It may be combined with and to be combined by a welding method or the like (region C in the figure). Alternatively, the area of the mounting groove 124a may be configured to be fixed through another coupling method or coupling means. On the other hand, as shown in the interval maintaining member 124 may be arranged so that both ends are formed with a constant gap (G) with the inner surface of the filter body (120a) and the other sealing portion (121a). In this case, when the filtration unit 121 is expanded by heating, the outermost filtration member 121b is prevented from coming into contact with the inner surface of the filter main body 120a, and the gap is maintained according to the second example. The sealing part 121a provided with the member 124 and the sealing part 121a positioned therein may not be in contact with each other.

The gap maintaining member 123 according to the first example may be provided in at least one seal 121a of the seal 121a disposed at the center of each seal 121a. In this case, as in the configuration example of the spacing holding member 124 according to the second example, the spacing holding member 123 according to the first example may be attached to any one sealing portion 121b having the mounting groove 124a disposed at the center thereof. It may be fitted so that a joining (B area in the figure) is made by a welding method or the like. Even in this case, the gap holding member 123 may be disposed such that both ends thereof have a predetermined gap G from the other sealing part 121a.

On the other hand, the spacing member 123 according to the first example may be arranged to be in line with the spacing member 124 according to the second example, alternatively, each of the sealing portion 121a located in the center portion The positions may be combined so as not to interfere with each other.

On the other hand, the gap maintaining member 125 according to the third example may be further provided between the innermost sealing part 121a and the innermost sealing part 121a and the other sealing part 121a adjacent to the innermost sealing part 121a. In this case, the gap maintaining member 125 according to the third example may be coupled to the one end portion or one end portion of the gap holding member 121a by a welding method (D region in the drawing). On the other hand, when only one end of the spacing holding member 125 according to the third example is coupled to any one sealing portion 121a, the other end is configured to contact the other sealing portion 121a, or a constant interval is It can also be configured to be maintained.

As such, the support member 122 and each of the space maintaining parts 123, 124, and 125 that may be configured may be arranged to form a radial arrangement at one end position of the filter part 121, in which case, the support member 122 may be formed. And the space maintaining portions 123, 124, and 125 are disposed at positions not interfering with each other, and may be arranged at intervals of about 90 to 120 degrees. In this case, the support member 122 and each of the spacers 123, 124, and 125 may be disposed at both ends of the filtration unit 121, or may be provided only at the end of the side from which the heat is introduced from the combustion device 110.

In addition, when the filtration member 121b is overlapped as described above, and each end is sealed in a state where the ends thereof are crossed by the seal 121a, as shown in FIG. Hole 121a-1 may be further formed at one or more positions 121a. When the sealing part 121a is subjected to thermal expansion or contraction deformation, the deformation amount of the sealing part 121a may be reduced by the holes 121a-1 formed as described above. That is, the hole 121a-1 may act as a buffer region for thermal deformation.

Meanwhile, as illustrated in FIGS. 6A and 6B, the filter 121 may be coupled to the filter body 120a only by the support member 122 at the discharge side end of the exhaust gas of the filter 121. . In this case, since the coupling of the support member 122 may be made as described above, further description thereof will be omitted. In addition, the support members 122 may be disposed radially at the end of the filter unit 121, in this case, may be arranged at intervals of about 90 to 120 degrees.

By the above configuration, the sealing portion 121a and the filtration member 121b constituting the filtration unit 121 may be fixed to the filter body 120a in a state in which a constant interval is maintained by the support member 122. In addition, by the configuration of any one or more of the space holding members (123, 124, 125), the sealing portion 121a and / or the filtering member (121b) can be maintained spaced apart from each other even when thermal expansion or contraction occurs, and Deformation that is distorted, curved or folded can be minimized.

On the other hand, the illustrated filter portion 121 is an example in which the center seal portion 121c is located on the exhaust gas discharge side, but the center seal portion 121c may be disposed to face the exhaust gas inflow side.

In addition, the filtration unit 121 is in contact with each other or at least one of the plurality of filtration members 121b of the plurality of filtration members 121b disposed in an overlapping structure, or the body of each filtration member 121b is folded or distorted. It may be further provided with a gap maintaining member of another structure so that the shape can be maintained without deformation. An example of such a space keeping member may be provided with a coil shape space maintaining member 126 that may be configured as shown in FIGS. 7A and 7B.

In this case, as shown in FIG. 7B, the coil-shaped spacing member 126 may be formed in a flat pressed form so that the wound body 126a overlaps, and the wound body 126a is slightly spaced apart. It may be made in a pressed form with a predetermined interval. Coil-shaped spacing member 126 having the configuration described above may be configured to be disposed in the space between the two filtering member (121b). In this case, as shown in FIG. 7C, the coil-shaped spacing member 126 may be provided with a coupling portion E that may be fixed at both ends thereof to have an annular structure. The coupling portion E may be made by a method such as welding or the like, or may be made by other general coupling means or methods.

Coil-shaped spacing member 126 is configured in the annular, for example, as shown in Figure 8, may be configured to fit in the space between the two filtering member 121b, in this case, the coil form A position fixing part 126b may be further provided to maintain a position disposed between the two filtering members 121b at any one or more positions of the body 126a of the gap holding member 126.

The position fixing part 126b may be configured such that one end is coupled to the wound body 126a of the spacing member 126, and the other end is coupled to the sealing part 121a or the filtering member 121b. It may be. For example, the position fixing part 126b may have a structure such as a rod or a rod, and each end thereof has an end portion (ie, an end portion of the body 126a and the filtering portion 121 of the spacer 126). , An end of the seal or the filtering member). Even in this case, the coupling may be made by a method such as welding or the like, or may be made by other general coupling means or methods.

With the above configuration, even when expansion or contraction of the filtration member 121b occurs due to heat or deformation occurs due to the discharge pressure of the exhaust gas, contact between the filtration members 121b can be minimized. Each filtration member 121b may be deformed and minimized to be folded or distorted, and the metal fiber mat may minimize gap deformation between meshes.

On the other hand, as shown in Figure 9, the filtration unit 121 may be further provided with a diffusion plate 127 at the exhaust gas inlet side end. The diffusion plate 127 may be formed in a circular plate structure, as shown, or the heat of combustion supplied from the combustion device 111 is diffused to the entire region of the exhaust gas inlet side end of the filter unit 121 and supplied. It may be of other structures as possible. Therefore, in consideration of the pressure of the exhaust gas and the supply pressure of the combustion heat supplied from the combustion device 111, the size of the diffusion plate 127 may be set so that the combustion heat can be diffused to the entire area of the end portion of the filter unit 121. .

On the other hand, the diffusion plate 127 may be coupled so that any one region is fixed to the support member 122, in this case, the positioning member 128 corresponding to the height of the support member 122 is filtered The diffusion plate 127 may be disposed between the end portion of the filter 121 and the diffusion plate 127 so that the diffusion plate 127 may be disposed in parallel with the end portion of the filtration unit 121. In this case, the filter member 121 is covered by the diffusion plate 127 by arranging the end of the filtration unit 121 and the diffusion plate 127 apart from each other by the support member 122 and the positioning member 128. It is possible to configure so that the heat of combustion flows to the central position of the). Meanwhile, the diffusion plate 127 is coupled to the end of the filtration unit 121 only by the positioning member 128, so that the diffusion plate 127 may be disposed at different intervals at the end of the filtration unit 121. It can also be configured to do so.

On the other hand, as shown in Figure 10a, the diffusion plate 127 may be formed with one or more slits (127a). When the diffusion plate 127 is coupled to the support member 122, the slit 127a may be formed at a position corresponding to the position of the support member 122 to reinforce the coupling force of the diffusion plate 127. . When the slit 127a is formed as described above, after the partial region of the support member 122 is disposed to be exposed through the slit 127a, the partial region of the exposed support member 122 and the diffusion plate 127 are welded. May be combined in the same manner.

And, as shown in Figure 10b, in order to prevent the direct discharge of the flame generated from the oxidized soot, when the diffusion plate 127 is disposed at the end of the filter portion 121 disposed on the exhaust gas discharge side As described above, the diffusion plate 127 in which the slit 127a is formed at a position corresponding to each support member 122 may be coupled.

On the other hand, as shown in Figure 11, the exhaust gas purification apparatus 100 is provided with a filter 120 according to each of the embodiments described above is provided with a combustion device 111 at one end of the filter 120 The inlet 110 is coupled, and the other end of the filter 120 may be configured to be coupled to the outlet 130 to form a discharge flow path of the exhaust gas purified by the filter 120. In this case, as described above, the filtration part 121 provided in the filter 120 may be configured to be fixed to the filter body 120a by the support part 122.

Meanwhile, at least one of the gap maintaining members 123, 124, and 125 according to each example may be provided at an end of the exhaust gas inlet-side filtering part 121 to maintain the gap between the sealing part and / or the filtering member. In addition, the main body of the filtration member 121b may be further provided with a coil-shaped spacing member 126.

In addition, the diffusion plate 127 may be further provided at the exhaust gas inlet side and the outlet side end of the filtration unit 121.

The filter for the exhaust gas purifier described above may not be limitedly applied by the configuration of the above-described embodiments, but the embodiments may be selectively combined with each or all of the embodiments so that various modifications may be made. It may be configured.

1 is a cross-sectional view schematically showing the internal structure of the exhaust gas purification device before improvement.

FIG. 2 is a view showing a state in which a filter is thermally expanded and / or contracted due to heating of a combustion device for oxidation of collected soot when the filter is regenerated through the configuration of the exhaust gas purification device of FIG. .

3 is a perspective view illustrating an example of a supporting member provided in a filter for an exhaust gas purifying apparatus according to an embodiment of the present invention.

Figure 4a is a perspective view showing an example of the interval maintaining member provided in the filter for exhaust gas purification apparatus according to an embodiment of the present invention.

Figure 4b is a perspective view showing another example of the interval holding member provided in the filter for exhaust gas purifying apparatus according to an embodiment of the present invention.

Figure 4c is a perspective view showing another example of the interval holding member provided in the filter for exhaust gas purifying apparatus according to an embodiment of the present invention.

FIG. 5A is a view schematically illustrating a structure of a filtration unit provided with a support member and a space keeping member at an inlet side end of the filtration unit constituting the exhaust gas purifier according to an embodiment of the present invention.

FIG. 5B is a partial cross-sectional view of the filter unit illustrating a state in which an end portion of the filter unit and a support member are coupled to the filter body according to the example of FIG. 5A.

FIG. 5C is a partial cross-sectional view of the filter unit illustrating a state in which the gap maintaining member of each embodiment is mounted at the end of the filter unit according to the example of FIG. 5A.

FIG. 6A is a view schematically illustrating a structure in which a support member is provided at an outlet side end of a filtration unit constituting a filtration device for an exhaust gas purifying apparatus according to an embodiment of the present invention.

FIG. 6B is a partial cross-sectional view of the filtration apparatus showing a state in which the support member is coupled to the end portion of the filtration unit and the filter body according to the example of FIG. 6A.

7A is a partial front view illustrating an example in which a coil-shaped spacing member provided in a filter for an exhaust gas purifying apparatus according to an embodiment of the present invention is disposed at a central portion of the filtration member.

FIG. 7B is a partial plan view of the coil spacer shown in FIG. 7A.

FIG. 7C is a partial front view illustrating another example in which a coil-shaped spacing member provided in the exhaust gas purifier filter according to an embodiment of the present invention is disposed at the center of the filtration member.

8 is a cross-sectional view showing an example of a state in which a coil-shaped spacing member according to an embodiment of the present invention is mounted on a filter.

FIG. 9 is a view schematically illustrating a structure in which a diffusion plate is provided at an inlet side end portion of a filtration unit constituting a exhaust gas purifier according to an embodiment of the present invention.

10A is a view showing the configuration of a diffusion plate according to another embodiment of the present invention.

FIG. 10B is a view schematically illustrating a structure in which the diffusion plate illustrated in FIG. 10A is provided at an end side of a discharge part of a filtration unit constituting a filter for an exhaust gas purifier according to an embodiment.

FIG. 11 is a schematic cross-sectional view of an internal structure of an exhaust gas purification device equipped with a filter according to an embodiment of the present invention.

* Description of the main parts of the drawings *

100 ... exhaust gas purifier 110 ... inlet

111 ... combustor 120 ... filter

120a ... filter body 121 ... filter unit

121a ... seal 121b ... filtration member

122 ... support member 123 ... first spacing member

123a, 124a ... mounting groove 123b, 124b ... slit

124 ... second spacing member 125 ... third spacing member

126 ... coil shape spacing member 126a ... coil body

126 b ... position fixing 127 ... diffuser plate

127a ... slit 128 ... positioning member

130 ... outlet

Claims (15)

A filtration unit including a plurality of filtration members formed of a plurality of layers and spaced apart from each other for filtration; And a spacing member configured to be coupled to an end of at least one filtration member disposed in a direction in which combustion heat is introduced, and at least one end of which is not in contact with an end of the other filtration member. Filter for exhaust gas purifier. The method of claim 1, wherein the filtration portion is configured such that a plurality of filtration members having a cylindrical shape is sealed in engagement with the structure in which both ends are staggered by the sealing portion, The gap maintaining member is coupled to any one or more seals arranged in a direction in which combustion heat flows, and at least one end thereof is configured to be in contact with an end of the other seal. The filter for exhaust gas purification apparatus according to claim 2, wherein each sealing part provided in the filtration part is formed with at least one hole. According to any one of claims 1 to 3, The filtration unit is further provided with at least one support member disposed inside the filter body to be fixed to the filter body, The support member has one surface coupled to an end portion of the filtration unit disposed in a direction in which combustion heat is introduced in a state in which the support member does not interfere with the spacing member, and one end portion is coupled to any one position inside the filter body, and a rectangular plate has a length. The exhaust gas purification device filter, characterized in that the center portion of the direction bent structure. The method of claim 1, wherein the gap retaining member has a structure in which the central plate is bent along the longitudinal direction of the rectangular plate, the central portion in the longitudinal direction is formed with a mounting groove coupled to the end of any one filtering member, both ends are An exhaust gas purifier filter, characterized in that it is configured to have a distance from the end of the other filtering member. The filter for exhaust gas purification apparatus according to claim 5, wherein the gap maintaining member further comprises a slit at one or more end portions in the longitudinal direction. 6. The filter for exhaust gas purification apparatus according to claim 5, wherein the gap maintaining member has a length longer than that of the other end with respect to the mounting groove. 3. The filter for exhaust gas purification apparatus according to claim 2, further comprising a spacing member disposed between any two seals, each end being coupled to the seal, and having a bent portion. The filter for exhaust gas purification apparatus according to claim 4, wherein the space keeping member and the support member are arranged radially at intervals of 90 degrees to 120 degrees. According to claim 1 or claim 2, wherein the filter portion is configured to further include at least one support member is coupled to one side to the end located to the discharge portion side, one end is coupled to any one position inside the filter body. Filter for exhaust gas purification apparatus characterized by the above-mentioned. The exhaust gas according to claim 1 or 2, further comprising a coil-shaped spacing member disposed between at least two filtering members and configured to prevent contact between the two filtering members or maintain the shape of the filtering member. Filter for gas purifier. 12. The filter for exhaust gas purification apparatus according to claim 11, wherein the coil-shaped spacing member is formed in a coil form in which coiled bodies overlap each other. 12. The filter for exhaust gas purification apparatus according to claim 11, wherein the coil-shaped spacing member is arranged to be coupled to the end of the filtration section by one or more position fixing units and wound around the central outer surface position of each filtration member. . The filter for exhaust gas purification apparatus according to claim 1 or 2, wherein the filtration unit further comprises a diffusion plate at one or more end positions of an exhaust gas inlet side end or an exhaust gas outlet side end. 15. The filter for exhaust gas purification apparatus according to claim 14, wherein the filtration unit further includes a slit at a position corresponding to an upper position of the support member.

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