Multi-stage heating honeycomb body

Abstract

The invention relates to a multistage heating honeycomb body, and relates to the technical field of tail gas treatment equipment, the multistage heating honeycomb body comprises a shell, a first positive electrode, a second positive electrode, a first negative electrode, a second negative electrode, a first layer group and a second layer group, the first layer group is divided into two first honeycomb layers, and the second layer group is divided into two second honeycomb layers; each first honeycomb layer is provided with a first current-conducting plate, each second honeycomb layer is provided with a second current-conducting plate, the first positive electrode electrifies one first honeycomb layer and one second honeycomb layer and is conducted with the first negative electrode through the first current-conducting plates and the second current-conducting plates respectively, and two first current flowing paths are formed; the second positive electrode, the other first honeycomb layer, the second honeycomb layer, the corresponding first conductive plate and the corresponding second conductive plate form two channels, and two second current flowing paths are formed. According to the invention, the first current flowing path and the second current flowing path are more uniformly distributed on the honeycomb body, and the electric heating uniformity of the honeycomb body is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment equipment, and in particular to a multi-stage heating honeycomb body. Background Art

[0002] The electrically heated honeycomb substrate is a technology used for exhaust gas treatment. It uses electrical heating to quickly heat the catalyst to its active temperature to improve the exhaust gas purification performance after the engine is started. The electrically heated honeycomb substrate can be used for the purification of fluids such as automobile exhaust. By allowing the fluid to flow through the flow paths of multiple compartments of the honeycomb structure, the catalyst is used to convert harmful substances in the exhaust gas.

[0003] The Chinese patent with the authorization announcement number CN102414409A discloses a honeycomb body capable of multi-stage heating, wherein the honeycomb body has at least one heating plate, wherein the heating plate has at least one first layer group made of a conductive material and a second layer group made of a conductive material, wherein the first layer group and the second layer group are wound around each other and electrically insulated from each other, wherein the first layer group forms a first current path, and the current for the first heating circuit passes through the first current path, and the second layer group forms a second current path, and the current for the second heating circuit passes through the second current path. However, the structured layers in the first layer group and the second layer group are folded together, and the first layer groups along the radial direction of the honeycomb carrier are spaced by the distance of two structured layers, so that the current paths in the first layer group and the second layer group are not uniformly distributed, resulting in poor uniformity in heating the honeycomb carrier. Summary of the invention

[0004] In order to improve the problem that the current path distribution in the first layer group and the second layer group is not uniform, resulting in poor uniformity in heating of the honeycomb carrier, the present application provides a multi-stage heating honeycomb body.

[0005] The multi-stage heating honeycomb body provided in this application adopts the following technical solution: A multi-stage heating honeycomb body, comprising a shell, a first positive electrode, a second positive electrode, a first negative electrode, a second negative electrode, a first layer group, and a second layer group, wherein the first layer group and the second layer group are mutually wound in an S shape in the shell to form a honeycomb body, the first layer group forms a first folded portion at the center of the honeycomb body, and the second layer group forms a second folded portion at the center of the honeycomb body; The first folded portion is provided with a first insulating member to divide the first layer group into two electrically insulated first honeycomb layers, the second folded portion is provided with a second insulating member to divide the second layer group into two electrically insulated second honeycomb layers, each of the first honeycomb layers is insulatedly connected to a first conductive plate, each of the second honeycomb layers is insulatedly connected to a second conductive plate, one of the first honeycomb layer and the second honeycomb layer is electrically connected to the first positive electrode, and one of the first conductive plate and the second conductive plate is electrically connected to the first negative electrode, so as to form two first current flow paths on the honeycomb body; Another one of the first honeycomb layer and the second honeycomb layer is electrically connected to the second positive electrode, and another one of the first conductive plate and the second conductive plate is electrically connected to the second negative electrode, so as to form two second current flow paths on the honeycomb body; The first current flow path and the second current flow path are sequentially spaced apart along the longitudinal direction of the honeycomb body.

[0006] By adopting the above technical solution, when the honeycomb body in the shell is electrically heated, the current acts on a first honeycomb layer and a second honeycomb layer through the first positive electrode, and then conducts with the first negative electrode through the first conductive plate and the second conductive plate respectively, forming two first current flow paths with the same heating state, and the second positive electrode and the other first honeycomb layer, the second honeycomb layer, and the first conductive plate and the second conductive plate respectively corresponding to form a connected passage, thereby forming two second current flow paths with the same heating state, so that the two first current flow paths and the two second current flow paths are spaced apart, so that the first current flow paths and the second current flow paths are more evenly distributed on the honeycomb body, thereby improving the uniformity of electrical heating of the honeycomb body.

[0007] In a specific possible implementation manner, the first honeycomb layer and the second honeycomb layer both include a corrugated sheet and two support sheets, the corrugated sheet is arranged between the two support sheets, and a channel for exhaust gas to flow is formed between the corrugated sheet and the support sheets.

[0008] By adopting the above technical solution, a space for placing the catalyst is formed between the support sheet and the corrugated sheet. When the exhaust gas flows in the channel, it contacts the catalyst to complete the catalytic treatment of the exhaust gas.

[0009] In a specific implementation manner, the first insulating member includes a first insulating plate, and two first honeycomb layers are located on both sides of the first insulating plate; the second insulating member includes a second insulating plate, and two second honeycomb layers are located on both sides of the second insulating plate.

[0010] By adopting the above technical solution, the first insulating plate divides the first honeycomb layer into a first current flow path and a second current flow path, and the second insulating plate divides the second honeycomb layer into a first current flow path and a second current flow path, thereby increasing the number of current flow paths in the honeycomb body and improving the heating uniformity of the honeycomb body.

[0011] In a specific possible implementation scheme, the first conductive plate is attached to the outer side of the support sheet of the first honeycomb layer through an insulating layer and is wound along with the first layer group, and the second conductive plate is attached to the outer side of the support sheet of the second honeycomb layer through an insulating layer and is wound along with the second layer group.

[0012] By adopting the above technical solution, the first conductive plate is installed on the first honeycomb layer through the insulating layer, and the second conductive plate is installed on the second honeycomb layer through the insulating layer, thereby reducing the space occupied by the first conductive plate and the second conductive plate in the honeycomb body and improving the convenience of installing the first conductive plate and the second conductive plate.

[0013] In a specific possible implementation, the shell is made of insulating material, the first positive electrode includes two first positive electrode guide posts, the two first positive electrode guide posts are threaded through the shell, and are electrically connected to the first honeycomb layer and the second honeycomb layer respectively, and the second positive electrode includes two second positive electrode guide posts, the two second positive electrode guide posts are threaded through the shell, and are electrically connected to the first honeycomb layer and the second honeycomb layer respectively.

[0014] By adopting the above technical solution, the two first current flow paths and the two second current flow paths are powered by the two first positive electrode conductors and the two second positive electrode conductors respectively, so that each current flow path can be easily controlled.

[0015] In a specific implementation scheme, the ends of the first conductive plate and the second conductive plate are both provided with connecting ends, the shell is provided with connecting grooves corresponding to the connecting ends one by one, the connecting ends can be plugged into the connecting grooves, and the first negative electrode is electrically connected to the second negative electrode.

[0016] By adopting the above technical solution, when the rolled honeycomb body is installed in the shell, the connecting ends of the first conductive plate and the second conductive plate are respectively inserted into the corresponding connecting grooves, which is beneficial to separate the first conductive plate, the second conductive plate from the first honeycomb layer, and the second honeycomb layer, and facilitates the electrical connection between the first conductive plate and the first negative electrode, and the second conductive plate and the second negative electrode.

[0017] In a specific possible implementation scheme, the first negative electrode includes two first negative poles, the second negative electrode includes two second negative poles, the two first negative poles and the two second negative poles are both arranged on the shell and are electrically connected to the corresponding connection ends respectively.

[0018] In a specific implementation scheme, the shell is provided with mounting holes corresponding to and communicating with the connecting grooves one by one, and the first negative electrode column and the second negative electrode column are respectively threadedly inserted into the mounting holes and abut against the corresponding connecting ends.

[0019] By adopting the above technical solution, the first negative electrode column, the second negative electrode column and the shell are threadedly connected, the first negative electrode column and the second negative electrode column are inserted into the corresponding mounting holes, and are respectively electrically connected with the corresponding connecting abutments, thereby improving the convenience of installing the first negative electrode column and the second negative electrode column.

[0020] In a specific possible implementation manner, threaded seats corresponding to the mounting holes are provided on the outer side wall of the shell, and the first negative electrode column and the second negative electrode column are respectively threadedly connected to the corresponding threaded seats.

[0021] By adopting the above technical solution and setting the threaded seat, the strength of the connection between the first negative pole and the second negative pole shell is improved.

[0022] In a specific embodiment, the thickness of the support sheets of the first layer group and the second layer group are both 25 micrometers to 35 micrometers.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the honeycomb body in the shell is electrically heated, the current acts on a first honeycomb layer and a second honeycomb layer through the first positive electrode, and then conducts with the first negative electrode through the first conductive plate and the second conductive plate, respectively, to form two first current flow paths with the same heating state, and the second positive electrode and the other first honeycomb layer, the second honeycomb layer, and the first conductive plate and the second conductive plate respectively corresponding to form a continuous passage, thereby forming two second current flow paths with the same heating state, so that the two first current flow paths and the two second current flow paths are arranged at intervals, so that the first current flow paths and the second current flow paths are more evenly distributed on the honeycomb body, thereby providing uniformity of electrical heating of the honeycomb body; 2. The first negative pole, the second negative pole and the shell are threadedly connected, the first negative pole and the second negative pole are inserted into the corresponding mounting holes, and are electrically connected with the corresponding connection abutments, thereby improving the convenience of installing the first negative pole and the second negative pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a multi-stage heating honeycomb body according to an embodiment of the present application.

[0025] Figure 2 It is a schematic diagram for showing the structure of the corrugated sheet and the supporting sheet.

[0026] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0027] Explanation of the reference numerals: 1. shell; 21. first positive electrode; 211. first positive electrode guide column; 22. second positive electrode; 221. second positive electrode guide column; 23. first negative electrode; 231. first negative electrode column; 24. second negative electrode; 241. second negative electrode column; 31. first layer group; 311. first honeycomb layer; 32. second layer group; 321. second honeycomb layer; 33. first folding portion; 34. second folding portion; 4. honeycomb body; 51. first insulating member; 511. first insulating plate; 52. second insulating member; 521. second insulating plate; 61. first conductive plate; 62. second conductive plate; 71. first current flow path; 72. second current flow path; 81. corrugated sheet; 82. support sheet; 91. connection end; 92. connection groove; 93. threaded seat; 94. mounting hole. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The embodiment of the present application discloses a multi-stage heating honeycomb body.

[0030] Reference Figure 1 A multi-stage heated honeycomb body includes a shell 1, a first positive electrode 21, a second positive electrode 22, a first negative electrode 23, a second negative electrode 24, a first layer group 31, and a second layer group 32. The shell 1 is made of insulating ceramic material. The first positive electrode 21 includes two first positive electrode guide posts 211, and the second positive electrode 22 includes two second positive electrode guide posts 221. The two first positive electrode guide posts 211 and the two second positive electrode guide posts 221 are both arranged on the shell 1 along the axis of the shell 1. The first negative electrode 23 includes two first negative electrode posts 231, and the second negative electrode 24 includes two second negative electrode posts 241. The two first negative electrode posts 231 and the two second negative electrode posts 241 are both arranged on the shell 1.

[0031] The first layer group 31 and the second layer group 32 are wound around each other in the shell 1 in an S shape to form a honeycomb body 4. The first layer group 31 forms a first folded portion 33 at the center of the honeycomb body 4, and the second layer group 32 forms a second folded portion 34 at the center of the honeycomb body 4. A filling polymer insulating material is provided between the first layer group 31 and the second layer group 32, between the parts of the first layer group 31 on both sides of the first folded portion 33, and between the parts of the second layer group 32 on both sides of the second folded portion 34 to achieve mutual insulation. A first insulating member 51 is provided on the first folded portion 33. The first insulating member 51 in this embodiment is a first insulating plate 511. The first insulating plate 511 is made of ceramic material and divides the first layer group 31 into two electrically insulated first honeycomb layers 311. A second insulating member 52 is provided on the second folded portion 34. The second insulating member 52 is a second insulating plate 521. The second insulating plate 521 is a ceramic material plate and divides the second layer group 32 into two electrically insulated second honeycomb layers 321.

[0032] The tails of the first honeycomb layer 311 and the second honeycomb layer 321 are fixedly arranged on the side wall of the shell 1, and the two first positive electrode guides 211 are electrically connected to one first honeycomb layer 311 and one second honeycomb layer 321 respectively, and the two second positive electrode guides 221 are electrically connected to another first honeycomb layer 311 and one second honeycomb layer 321 respectively. A first conductive plate 61 is fixedly arranged on the side wall of each first honeycomb layer 311, and the first conductive plate 61 is connected to the first honeycomb layer 311 through an insulating layer, and the insulating layer is a high molecular polymer insulating material, so that the first honeycomb layer 311 and the first conductive plate 61 are insulated, and the first conductive plate 61 is electrically connected to the first honeycomb layer 311 at the first folding portion 33. The first conductive plate 61 is rolled along with the first honeycomb layer 311, so as to reduce the space occupied by the first conductive plate 61 in the honeycomb body 4 and improve the convenience of installing the first conductive plate 61 and the second conductive plate 62. The tail of the first conductive plate 61 connected to the first positive electrode conductor 211 is connected to the first negative electrode column 231 to form a first current flow path 71, and the tail of the first conductive plate 61 connected to the second positive electrode conductor 221 is connected to the second negative electrode column 241 to form a second current flow path 72.

[0033] A second conductive plate 62 is fixedly provided on the side wall of each second honeycomb layer 321. The second conductive plate 62 is connected to the second honeycomb layer 321 through an insulating layer. The insulating layer is a high molecular polymer insulating material, so that the second honeycomb layer 321 is insulated from the second conductive plate 62. The second conductive plate 62 is electrically connected to the second honeycomb layer 321 at the second folding portion 34. The second conductive plate 62 is rolled along with the second honeycomb layer 321, reducing the space occupied by the second conductive plate 62 in the honeycomb body 4 and improving the convenience of installing the second conductive plate 62. The tail of the second conductive plate 62 connected to the first positive electrode lead 211 is connected to the first negative electrode column 231 to form a first current flow path 71, and the tail of the second conductive plate 62 connected to the second positive electrode lead 221 is connected to the second negative electrode column 241 to form a second current flow path 72, so that the first current flow path 71 and the second current flow path 72 are arranged in sequence along the longitudinal direction of the honeycomb body 4.

[0034] When the honeycomb body 4 in the shell 1 is electrically heated, the current acts on a first honeycomb layer 311 and a second honeycomb layer 321 through the first positive electrode 21, and then conducts with the first negative electrode 23 through the first conductive plate 61 and the second conductive plate 62, respectively, to form two first current flow paths 71 with the same heating state. The second positive electrode 22 forms two passages with another first honeycomb layer 311, the second honeycomb layer 321 and the corresponding first conductive plates 61 and second conductive plates 62, respectively, to further form two second current flow paths 72 with the same heating state, so that the two first current flow paths 71 and the two second current flow paths 72 are spaced apart, so that the first current flow paths 71 and the second current flow paths 72 are more evenly distributed on the honeycomb body 4, thereby providing uniformity in the electrical heating of the honeycomb body 4.

[0035] In this embodiment, the first honeycomb layer 311 and the second honeycomb layer 321 both include a corrugated sheet 81 and two support sheets 82. The corrugated sheet 81 is disposed between the two support sheets 82. The thickness of the support sheet 82 is 25 microns to 35 microns. A channel for exhaust gas circulation is formed between the corrugated sheet 81 and the support sheets 82. Catalysts can be coated on the corrugated sheet 81 and the support sheets 82. A space for placing the catalyst is formed between the support sheets 82 and the corrugated sheet 81. When the exhaust gas flows in the channel, it contacts the catalyst to complete the catalytic treatment of the exhaust gas.

[0036] The two first positive electrode guide posts 211 and the two first negative electrode guide posts 231 are respectively connected to the positive electrode and the negative electrode of an external power source, so that the current applied to the two first positive electrode guide posts 211 and the first negative electrode guide posts 231 is the same, so that the heating effect generated by the two first current flow paths 71 on the honeycomb body 4 is the same. The two second positive electrode guide posts 221 and the two second negative electrode guide posts 241 are respectively connected to the positive electrode and the negative electrode of another external power source, so that the current applied to the two second positive electrode guide posts 221 and the second negative electrode guide posts 241 is the same, so that the heating effect generated by the two second current flow paths 72 on the honeycomb body 4 is the same. The two first current flow paths 71 and the two second current flow paths 72 are respectively powered by the two first positive electrode guide posts 211 and the two second positive electrode guide posts 221, so as to facilitate the control of each current flow path.

[0037] The first positive electrode guide post 211 and the second positive electrode guide post 221 are both threadedly inserted into the housing 1 , and the first positive electrode guide post 211 and the second guide post are respectively in contact with the corrugated sheets 81 in the first honeycomb layer 311 and the second honeycomb layer 321 to form a passage.

[0038] The ends of the first conductive plate 61 and the second conductive plate 62 are both provided with a connecting end 91, and a connecting groove 92 corresponding to the connecting end 91 is provided on the shell 1, and the connecting groove 92 is arranged along the axial direction of the shell 1, and the connecting end 91 can be inserted into the connecting groove 92, and a threaded seat 93 corresponding to the connecting groove 92 is provided on the outer side of the shell 1, and each threaded seat 93 is provided with a threaded hole arranged along the radial direction of the shell 1, and each first negative pole 231 and each second negative pole 241 corresponds to a threaded seat 93 respectively, and the shell 1 is provided with a mounting hole 94 at a position corresponding to the threaded hole on each threaded seat 93, and the mounting hole 94 corresponds to the connecting groove 92 one by one, and the first negative pole 231 and the second negative pole 241 are both screwed into the threaded hole on the threaded seat 93, and inserted into the mounting hole 94, and abut against the connecting end 91, so as to form an electrical connection between the first negative pole 231 or the second negative pole 241 and the connecting end 91.

[0039] The first negative pole 231, the second negative pole 241 and the housing 1 are threadedly connected, and the first negative pole 231 and the second negative pole 241 are inserted into the corresponding mounting holes 94 and electrically connected with the corresponding connection abutments, thereby improving the convenience of installing the first negative pole 231 and the second negative pole 241. The strength of the connection between the first negative pole 231 and the second negative pole 241 and the housing 1 is improved by setting the threaded seat 93.

[0040] The implementation principle of a multi-stage heating honeycomb body in an embodiment of the present application is as follows: when the honeycomb body 4 in the shell 1 is electrically heated, the current acts on a first honeycomb layer 311 and a second honeycomb layer 321 through the first positive electrode 21, and then conducts with the first negative electrode 23 through the first conductive plate 61 and the second conductive plate 62, respectively, to form two first current flow paths 71 with the same heating state, and the second positive electrode 22 forms two passages with another first honeycomb layer 311, the second honeycomb layer 321 and the corresponding first conductive plates 61 and second conductive plates 62, respectively, to further form two second current flow paths 72 with the same heating state, so that the two first current flow paths 71 and the two second current flow paths 72 are arranged at intervals, so that the first current flow paths 71 and the second current flow paths 72 are more evenly distributed on the honeycomb body 4, thereby providing uniformity in the electrical heating of the honeycomb body 4.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-stage heated honeycomb body, characterized in that: The invention comprises a shell (1), a first positive electrode (21), a second positive electrode (22), a first negative electrode (23), a second negative electrode (24), a first layer group (31), and a second layer group (32); the first layer group (31) and the second layer group (32) are mutually wound in an S shape in the shell (1) to form a honeycomb body (4); the first layer group (31) forms a first folded portion (33) at the center of the honeycomb body (4); and the second layer group (32) forms a second folded portion (34) at the center of the honeycomb body (4); A first insulating member (51) is provided on the first folded portion (33) so as to divide the first layer group (31) into two electrically insulated first honeycomb layers (311); a second insulating member (52) is provided on the second folded portion (34) so ​​as to divide the second layer group (32) into two electrically insulated second honeycomb layers (321); each of the first honeycomb layers (311) is insulatedly connected to a first conductive plate (61); each of the second honeycomb layers (321) is insulatedly connected to a second conductive plate (62); one of the first honeycomb layers (311) and the second honeycomb layer (321) is electrically connected to the first positive electrode (21); and one of the first conductive plate (61) and the second conductive plate (62) is electrically connected to the first negative electrode (23) so as to form two first current flow paths (71) on the honeycomb body (4); Another one of the first honeycomb layers (311) and the second honeycomb layer (321) is electrically connected to the second positive electrode (22), and another one of the first conductive plate (61) and the second conductive plate (62) is electrically connected to the second negative electrode (24), so as to form two second current flow paths (72) on the honeycomb body (4); The first current flow path (71) and the second current flow path (72) are arranged in sequence and spaced apart along the longitudinal direction of the honeycomb body (4).

2. The multi-stage heated honeycomb body according to claim 1, characterized in that: The first honeycomb layer (311) and the second honeycomb layer (321) both comprise a corrugated sheet (81) and two support sheets (82); the corrugated sheet (81) is arranged between the two support sheets (82); and a channel for exhaust gas to flow is formed between the corrugated sheet (81) and the support sheets (82).

3. The multi-stage heated honeycomb body according to claim 2, characterized in that: The first insulating member (51) includes a first insulating plate (511), and the two first honeycomb layers (311) are located on both sides of the first insulating plate (511); the second insulating member (52) includes a second insulating plate (521), and the two second honeycomb layers (321) are located on both sides of the second insulating plate (521).

4. The multi-stage heated honeycomb body according to claim 2, characterized in that: The first conductive plate (61) is attached to the outer side of the support sheet (82) of the first honeycomb layer (311) through an insulating layer and is wound along with the first layer group (31); the second conductive plate (62) is attached to the outer side of the support sheet (82) of the second honeycomb layer (321) through an insulating layer and is wound along with the second layer group (32).

5. The multi-stage heated honeycomb body according to claim 2, characterized in that: The shell (1) is made of insulating material; the first positive electrode (21) comprises two first positive electrode guide posts (211); the two first positive electrode guide posts (211) are threadedly inserted into the shell (1) and are electrically connected to the first honeycomb layer (311) and the second honeycomb layer (321) respectively; the second positive electrode (22) comprises two second positive electrode guide posts (221); the two second positive electrode guide posts (221) are threadedly inserted into the shell (1) and are electrically connected to the first honeycomb layer (311) and the second honeycomb layer (321) respectively.

6. The multi-stage heated honeycomb body according to claim 5, characterized in that: The ends of the first conductive plate (61) and the second conductive plate (62) are both provided with connecting ends (91), and the shell (1) is provided with connecting grooves (92) corresponding to the connecting ends (91) one by one, and the connecting ends (91) can be plugged into the connecting grooves (92), and the first negative electrode (23) is electrically connected to the second negative electrode (24).

7. The multi-stage heated honeycomb body according to claim 6, characterized in that: The first negative electrode (23) includes two first negative electrode columns (231), and the second negative electrode (24) includes two second negative electrode columns (241). The two first negative electrode columns (231) and the two second negative electrode columns (241) are both arranged on the shell (1) and are respectively electrically connected to the corresponding connection terminals (91).

8. The multi-stage heated honeycomb body according to claim 7, characterized in that: The shell (1) is provided with a mounting hole (94) which corresponds to and is connected to the connecting groove (92) in a one-to-one manner; the first negative electrode column (231) and the second negative electrode column (241) are respectively threadedly inserted into the mounting hole (94) and abut against the corresponding connecting end (91).

9. The multi-stage heated honeycomb body according to claim 8, characterized in that: A threaded seat (93) corresponding one-to-one to the mounting hole (94) is provided on the outer side wall of the shell (1), and the first negative electrode column (231) and the second negative electrode column (241) are respectively threadedly connected to the corresponding threaded seat (93).

10. The multi-stage heated honeycomb body according to claim 2, characterized in that: The thickness of the support sheets (82) of the first layer group (31) and the second layer group (32) are both 25 micrometers to 35 micrometers.

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