Sagger and industrial kiln

Abstract

The utility model relates to the technical field of battery manufacturing equipment, and provides a sagger and an industrial kiln. The sagger comprises a sagger body, the sagger body comprises a bottom wall and a side wall arranged on the peripheral side of the bottom wall in a surrounding mode, a containing cavity is formed between the side wall and the bottom wall, at least one exhaust notch is formed in the top of the side wall, and the exhaust notch is communicated with the containing cavity; the first material blocking piece is arranged on the side wall and at least shields part of the exhaust notch, and the first material blocking piece is a breathable piece. According to the technical scheme, the material loss in the material sintering process can be reduced, the ash deposition degree of the kiln is reduced, and the ash removal frequency of the kiln is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing equipment, and in particular to a sagger and an industrial kiln. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] During the sintering process of the positive electrode material of the power battery, the material usually needs to be loaded into a special sagger, and then the sagger is placed in the material channel of the industrial kiln for sintering.

[0004] In the related art, when the material is sintered in the sagger, it will boil due to the high temperature, causing the material to overflow from the sagger through the exhaust port along with the exhaust gas, thereby causing material loss and dust accumulation in the kiln. Utility Model Content

[0005] In view of the above problems, the purpose of this application is to provide a sagger and an industrial kiln to reduce material loss during the sintering process and reduce the degree of ash accumulation in the kiln. This purpose is achieved through the following technical solutions:

[0006] In the first aspect, the present application provides a sagger, comprising: a sagger body, comprising a bottom wall and side walls arranged around the bottom wall, a accommodating cavity being formed between the side walls and the bottom wall, at least one exhaust notch being arranged on the top of the side wall, and the exhaust notch being communicated with the accommodating cavity; a first material blocking member, arranged on the side wall and at least blocking a portion of the exhaust notch; wherein the first material blocking member is a breathable member.

[0007] According to the sagger provided in the present application, a first material blocking member is arranged at the exhaust notch of the side plate, and the first material blocking member is used to at least partially cover the exhaust notch, thereby preventing the material from overflowing from the exhaust notch when the material is sintered. This can not only reduce the material loss in the sagger during sintering, thereby reducing the material ablation rate, but also reduce the adverse effect of material overflowing into the kiln and causing dust accumulation in the kiln. Moreover, since the first material blocking member is a breathable member, the exhaust gas generated during the sintering of the material can be discharged to the outside of the sagger through the first material blocking member, thereby helping to achieve the stability and safety of the material sintering.

[0008] In addition, the sagger provided in this application may also have the following additional technical features:

[0009] In some embodiments of the present application, an interlayer cavity is provided at the top of the side wall, the interlayer cavity is provided along the edge of the exhaust notch, and the first material blocking member is partially provided in the interlayer cavity.

[0010] The interlayer cavity is arranged along the edge of the exhaust notch to facilitate installation of the first material blocking member, and part of the first material blocking member is arranged in the interlayer cavity, thereby reducing the material from overflowing to the outside of the sagger along the edge of the exhaust notch.

[0011] In some embodiments of the present application, a plurality of exhaust gaps are provided at the top of the side wall, and the plurality of exhaust gaps are arranged at circumferential intervals along the side wall; the number of the first blocking members is the same as the number of the exhaust gaps, and the plurality of the blocking members correspondingly block the plurality of exhaust gaps.

[0012] The number of exhaust notches is increased to increase the exhaust area of ​​the sagger, which helps to improve the exhaust efficiency during material sintering. At the same time, by providing a first material blocking member at each exhaust notch to block the material at each exhaust notch, the risk of material overflowing from the exhaust notch can be reduced, thereby reducing the degree of ash accumulation in the kiln and extending the frequency of cleaning the kiln.

[0013] In some embodiments of the present application, a support portion is formed between adjacent exhaust notches, and the support portion is used to support the bowl cover or to support the bowl body of an upper layer when the bowl body is arranged in multiple layers.

[0014] The supporting part is higher than the bottom edge of the exhaust notch, so that it can support the bowl cover when a bowl cover is provided on the sagger, or support the upper bowl body when a multi-layer bowl body is provided. The structure and principle are relatively simple and easy to implement.

[0015] In some embodiments of the present application, the sagger further includes a sagger cover, the accommodating cavity has an opening, and the sagger cover is used to cover the opening.

[0016] By adding a bowl cover covering the opening of the accommodating cavity, the risk of the material overflowing from the opening to the outside of the sagger during sintering of the material can be reduced.

[0017] In some embodiments of the present application, the bowl cover is provided with a window, which is communicated with the accommodating chamber. The sagger also includes a second material blocking member, which is provided on the bowl cover and corresponds to the position of the window to block the window, and the second material blocking member is a breathable member.

[0018] It can be understood that the function of the window is the same as that of the exhaust gap, which is used to allow exhaust gas to be discharged to the outside of the sagger. By arranging a second material blocking member corresponding to the window, the second material blocking member is used to prevent material from overflowing from the window to the outside of the sagger, and the exhaust gas can be discharged, thereby reducing the material loss rate during sintering, reducing the degree of ash accumulation in the kiln, and reducing the frequency of cleaning.

[0019] In some embodiments of the present application, a limiting groove is provided on a side of the bowl cover facing away from the accommodating cavity, the limiting groove corresponds to the position of the window, and the second material blocking member is arranged in the limiting groove.

[0020] By setting a limiting groove on the side of the bowl cover away from the accommodating cavity, the second material blocking member is installed in the limiting groove, so that only exhaust gas can be discharged and material overflow can be prevented, thereby further improving the exhaust efficiency and reducing the risk of ash accumulation in the kiln.

[0021] In some embodiments of the present application, the number of the windows is two, and the two windows are arranged at an interval; the number of the second blocking members is two, and the two second blocking members correspondingly block the two windows.

[0022] The number of windows opened on the bowl cover is increased, which helps to further increase the exhaust area and improve the exhaust efficiency during material sintering.

[0023] In some embodiments of the present application, the first material blocking member includes asbestos cloth or glass fiber cloth; and / or the second material blocking member includes asbestos cloth or glass fiber cloth.

[0024] Asbestos cloth and glass fiber cloth not only have good high temperature resistance, but also have flame retardancy, which helps to increase the service life of the product, and can also allow the waste gas generated during the sintering of the material to pass through and be discharged to the outside of the sagger, thereby improving the safety of the material when sintering in the sagger. At the same time, it can also reduce the risk of fine materials overflowing from the first exhaust gap or window with the gas, thereby reducing the situation where the material overflows from the sagger and causes dust accumulation in the kiln, thereby extending the frequency of kiln cleaning.

[0025] In a second aspect, the present application provides an industrial kiln, comprising a sagger as described in any one of the embodiments of the first aspect.

[0026] The industrial kiln provided in the present application comprises the sagger described in any one of the embodiments of the first aspect, and thus has the technical effects described in any one of the embodiments above, which will not be described in detail herein.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 A schematic diagram of the structure of a bowl body provided in some embodiments of the present application;

[0030] Figure 2 A schematic structural diagram of a double-layer bowl provided in some embodiments of the present application;

[0031] Figure 3 A schematic diagram of a top view of a bowl body provided in some embodiments of the present application;

[0032] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0033] Figure 5 A schematic diagram of a top view of a bowl cover provided in some embodiments of the present application;

[0034] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the BB direction.

[0035] The reference numerals are as follows:

[0036] 100, bowl body; 200, bowl cover;

[0037] 11. bottom wall; 12. side wall; 121. exhaust notch; 122. interlayer cavity; 123. support portion; 13. accommodating cavity; 14. first material blocking member;

[0038] 21. Window; 22. Second blocking member. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0048] During the sintering process of positive electrode materials for power batteries, the materials usually need to be loaded into special saggers, and then the saggers need to be placed in the material channel of an industrial kiln for sintering.

[0049] In the related art, when the material is sintered in the sagger, it will boil due to the high temperature, causing the material to overflow from the sagger through the exhaust port along with the exhaust gas, thereby causing material loss and dust accumulation in the kiln.

[0050] In order to solve the problem that materials will overflow from the sagger along with the exhaust gas from the exhaust port, thereby causing material loss and dust accumulation in the kiln, the present application designs a sagger, by providing an exhaust notch at the top of the side wall of the sagger body, and adding a first breathable material blocking member at the exhaust notch, so that the first material blocking member can block the material from overflowing from the exhaust notch and allow the exhaust gas to be discharged normally, thereby reducing the material loss rate during sintering, and further reducing the degree of dust accumulation in the kiln, and effectively reducing the cleaning frequency.

[0051] The sagger 100 disclosed in the embodiment of the present application is used in industrial kilns such as roller kilns or box kilns, and is used for sintering positive electrode materials of power batteries.

[0052] See also Figures 1 to 4 , Figure 1 A schematic diagram of the structure of a bowl body provided in some embodiments of the present application; Figure 2 A schematic structural diagram of a double-layer bowl provided in some embodiments of the present application; Figure 3 A schematic diagram of a top view of a bowl body provided in some embodiments of the present application; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction. The embodiment of the present application provides a sagger, including a sagger body 100 and a first material blocking member 14. The sagger body 100 includes a bottom wall 11 and a side wall 12 arranged around the bottom wall 11, and an accommodating cavity 13 is formed between the side wall 12 and the bottom wall 11. At least one exhaust notch 121 is provided at the top of the side wall 12, and the exhaust notch 121 is connected to the accommodating cavity 13; the first material blocking member 14 is provided on the side wall 12, and at least partially blocks the exhaust notch 121, and the first material blocking member 14 is a breathable member.

[0053] In this embodiment, the accommodating chamber 13 is used to accommodate the material to be sintered.

[0054] The side wall 12 has a plurality of wall surfaces, and there may be one or more exhaust notches 121 . The exhaust notches 121 may be provided on any wall surface, or may be defined at the connection position of two adjacent wall surfaces.

[0055] Exemplarily, the exhaust notch 121 may be in any shape such as a trapezoid or a rectangle.

[0056] Exemplarily, the first material blocking member 14 may be a breathable fiber fabric that is resistant to high temperatures, such as asbestos cloth, glass fiber cloth, and the like.

[0057] By arranging the first material blocking member 14 at the exhaust notch 121 of the side plate, and utilizing the first material blocking member 14 to at least partially cover the exhaust notch 121, it can prevent the material from overflowing from the exhaust notch 121 when the material is sintered. This can not only reduce the material loss during sintering in the sagger to reduce the material ablation rate, but also reduce the adverse effect of the material overflowing into the kiln causing dust accumulation in the kiln. Moreover, since the first material blocking member 14 is a breathable member, the exhaust gas generated during the sintering of the material can be discharged to the outside of the sagger through the first material blocking member 14, thereby helping to achieve the stability and safety of the material sintering.

[0058] See also Figures 1 to 4 According to some embodiments of the present application, an interlayer cavity 122 is provided at the top of the side wall 12 , the interlayer cavity 122 is arranged along the edge of the exhaust notch 121 , and the first blocking member 14 is partially arranged in the interlayer cavity 122 .

[0059] In this embodiment, it can be understood that the side wall 12 has a certain thickness, and the interlayer cavity 122 is a mounting groove opened at the top of the side wall 12 corresponding to the bottom edge of the exhaust notch 121 .

[0060] Exemplarily, the thickness of the side wall 12 is 10 mm, the width of the interlayer cavity 122 can be set to 2 mm-3 mm, and the depth thereof can be set to 8 mm-12 mm.

[0061] The interlayer cavity 122 is provided along the edge of the exhaust notch 121 to facilitate installation of the first material blocking member 14 , and part of the first material blocking member 14 is provided in the interlayer cavity 122 , thereby reducing the material from overflowing to the outside of the sagger along the edge of the exhaust notch 121 .

[0062] See also Figures 1 to 4 According to some embodiments of the present application, a plurality of exhaust notches 121 are provided at the top of the side wall 12, and the plurality of exhaust notches 121 are arranged at intervals along the circumference of the side wall 12; the number of the first blocking members 14 is the same as the number of the exhaust notches 121, and the plurality of blocking members correspondingly block the plurality of exhaust notches 121.

[0063] In this embodiment, illustratively, the bottom wall 11 is rectangular in shape, the side wall 12 has four wall surfaces, a venting notch 121 is disposed at the top of each wall surface, and a first blocking member 14 is disposed at each venting notch 121 .

[0064] The number of exhaust notches 121 is increased to increase the exhaust area of ​​the sagger, thereby helping to improve the exhaust efficiency during material sintering. At the same time, by providing a first material blocking member 14 at each exhaust notch 121 to block and isolate each exhaust notch 121, the risk of material overflowing from the exhaust notch 121 can be reduced, thereby reducing the degree of ash accumulation in the kiln and extending the frequency of cleaning the kiln.

[0065] See also Figure 2 According to some embodiments of the present application, a support portion 123 is formed between adjacent exhaust notches 121 , and the support portion 123 is used to support the bowl cover 200 or to support the upper bowl body 100 when the bowl body 100 is arranged in multiple layers.

[0066] The supporting portion 123 is higher than the bottom edge of the exhaust notch 121, so that it can support the bowl cover 200 when the sagger is provided with the bowl cover 200, or support the upper bowl body 100 when a multi-layer bowl body 100 is provided. The structure and principle are relatively simple and easy to implement.

[0067] According to some embodiments of the present application, the sagger further includes a sagger cover 200 , the accommodating cavity 13 has an opening, and the sagger cover 200 is used to cover the opening.

[0068] In this embodiment, the side of the bowl cover 200 facing the opening is in sealing contact with the top end surface of the support portion 123 .

[0069] By adding a bowl cover 200 covering the opening of the accommodating chamber 13 , the risk of the material overflowing from the opening to the outside of the sagger during sintering can be reduced.

[0070] See also Figure 5 and Figure 6 , Figure 5 A schematic diagram of a top view of a bowl cover 200 provided in some embodiments of the present application; Figure 6 for Figure 5 According to some embodiments of the present application, the bowl cover 200 is provided with a window 21, the window 21 is connected to the accommodating chamber 13, the sagger further comprises a second material blocking member 22, the second material blocking member 22 is provided on the bowl cover 200, and corresponds to the position of the window 21 to block the window 21, and the second material blocking member 22 is a breathable member.

[0071] In this embodiment, illustratively, the shape of the window 21 can be any shape such as a rectangle or a circle.

[0072] It can be understood that the function of the window 21 is the same as that of the exhaust notch 121, which is used to allow the exhaust gas to be discharged to the outside of the sagger.

[0073] Exemplarily, the first material blocking member 14 may also be a breathable fiber fabric that is resistant to high temperatures, such as asbestos cloth, glass fiber cloth, etc.

[0074] By arranging the second material blocking member 22 at the corresponding position of the window 21, the second material blocking member 22 is used to prevent the material from overflowing from the window 21 to the outside of the sagger and to allow the exhaust gas to be discharged, thereby reducing the material loss rate during sintering, reducing the degree of ash accumulation in the kiln, and reducing the frequency of cleaning.

[0075] See also Figure 5 and Figure 6 According to some embodiments of the present application, a limiting groove is provided on the side of the bowl cover 200 facing away from the accommodating cavity 13 , the limiting groove corresponds to the position of the window 21 , and the second material blocking member 22 is disposed in the limiting groove.

[0076] In this embodiment, it can be understood that the circumferential dimension of the limiting groove is greater than the circumferential dimension of the window 21. For example, the thickness of the bowl cover 200 is 10 mm, the window 21 is rectangular, and the dimensions are: length 180 mm, width 30 mm, depth 7 mm, then the dimensions of the limiting groove can be set to: length 200 mm, width 50 mm, depth 3 mm.

[0077] By setting a limiting groove on the side of the bowl cover 200 away from the accommodating chamber 13, the second material blocking member 22 is installed in the limiting groove, so that only the exhaust gas can be discharged and the material overflow can be prevented, thereby further improving the exhaust efficiency and reducing the risk of dust accumulation in the kiln.

[0078] See also Figure 5 According to some embodiments of the present application, the number of windows 21 is two, and the two windows 21 are arranged at an interval; the number of second blocking members 22 is two, and the two second blocking members 22 correspondingly block the two windows 21.

[0079] In this embodiment, the cross-sectional sizes or shapes of the two windows 21 may be the same or different.

[0080] The number of windows 21 provided on the bowl cover 200 is increased, thereby helping to further increase the exhaust area, so as to improve the exhaust efficiency during the sintering of materials.

[0081] According to some embodiments of the present application, the first blocking member 14 and the second blocking member 22 include asbestos cloth or glass fiber cloth.

[0082] In this embodiment, the first material blocking member 14 and the second material blocking member 22 include asbestos cloth or glass fiber cloth. In addition, they can also be formed by combining asbestos cloth and glass fiber cloth.

[0083] Asbestos cloth and glass fiber cloth not only have good high temperature resistance, but also have flame retardancy, which helps to improve the service life of the product, and can also allow the waste gas generated during the sintering of the material to pass through and be discharged to the outside of the sagger, thereby improving the safety of the material when sintering in the sagger. At the same time, it can also reduce the risk of fine materials overflowing from the first exhaust gap 121 or the window 21 with the gas, thereby reducing the situation where the material overflows from the sagger and causes the kiln to accumulate dust, thereby extending the frequency of kiln cleaning.

[0084] According to some embodiments of this application, see Figures 1 to 6 The present application provides a sagger, comprising a bowl body 100, a bowl cover 200, a first material blocking member 14 and a second material blocking member 22. The bowl body 100 comprises a bottom wall 11 and a side wall 12 arranged around the bottom wall 11, and a receiving chamber 13 for receiving materials to be sintered is defined between the side wall 12 and the bottom wall 11. The receiving chamber 13 has an opening, and the bowl cover 200 is arranged to cover the opening. The side wall 12 has four wall surfaces, and a venting notch 121 is arranged at the top of each wall surface, and an interlayer cavity 122 is arranged at the bottom edge of each venting notch 121, and the first material blocking member 14 is shielded by the venting notch 121, and part of the first material blocking member 14 is arranged in the interlayer cavity 122. The bowl cover 200 is provided with a window 21 connected to the receiving chamber 13, and a limiting groove is arranged on the side of the bowl cover 200 facing away from the receiving chamber 13, and the second material blocking member 22 is arranged in the limiting groove and shielded by the window 21. The first material blocking member 14 and the second material blocking member 22 are both air-permeable members. The above technical solution can not only reduce the risk of material overflowing to the outside of the sagger during sintering, but also allow normal exhaust during material sintering, and reduce the degree of ash accumulation in the kiln, thereby reducing the frequency of ash cleaning.

[0085] According to some embodiments of the present application, the present application also provides an industrial kiln, comprising the sagger of any one of the embodiments of the first aspect.

[0086] The industrial kiln provided by the present application, for example, can be a roller kiln or a box kiln, etc., which can be used to generate positive electrode materials for batteries. Since the kiln includes any of the saggers in the above embodiments, it has the technical effects of any of the above embodiments, which will not be repeated here.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A sagger, characterized in that: include: The bowl body comprises a bottom wall and a side wall arranged around the bottom wall, a receiving cavity is formed between the side wall and the bottom wall, at least one exhaust notch is arranged on the top of the side wall, and the exhaust notch is connected with the receiving cavity; A first material blocking member, disposed on the side wall and at least partially blocking the exhaust notch; Wherein, the first material-blocking member is a breathable member.

2. The sagger according to claim 1, characterized in that: An interlayer cavity is provided on the top of the side wall, the interlayer cavity is arranged along the edge of the exhaust notch, and the first material blocking member is partially arranged in the interlayer cavity.

3. The sagger according to claim 1, characterized in that: A plurality of exhaust notches are provided on the top of the side wall, and the plurality of exhaust notches are arranged at intervals along the circumference of the side wall; The number of the blocking members is the same as the number of the exhaust notches, and a plurality of the first blocking members correspondingly block a plurality of the exhaust notches.

4. The sagger according to claim 3, characterized in that: A supporting portion is formed between adjacent exhaust notches, and the supporting portion is used to support the bowl cover or to support the bowl body of the upper layer when the bowl body is arranged in multiple layers.

5. The sagger according to any one of claims 1 to 4, characterized in that: The sagger also includes a sagger cover, the accommodating cavity has an opening, and the sagger cover is used to cover the opening.

6. The sagger according to claim 5, characterized in that: The bowl cover is provided with a window, and the window is communicated with the accommodating cavity; The sagger further comprises a second material blocking member, which is arranged on the sagger cover and corresponds to the position of the window to cover the window, and is a breathable member.

7. The sagger according to claim 6, characterized in that: A limiting groove is provided on a side of the bowl cover facing away from the accommodating cavity, the limiting groove corresponds to the position of the window, and the second material blocking member is arranged in the limiting groove.

8. The sagger according to claim 7, characterized in that: The number of the windows is two, and the two windows are arranged at an interval; The number of the second blocking members is two, and the two second blocking members correspondingly block the two windows.

9. The sagger according to claim 6, characterized in that: The first material blocking member comprises asbestos cloth or glass fiber cloth; And / or, the second material blocking member includes asbestos cloth or glass fiber cloth.

10. An industrial kiln, characterized in that: The invention comprises the sagger described in any one of claims 1 to 9.

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