Sealing structure for rod hole site of roller kiln and roller kiln

Abstract

The utility model discloses a sealing structure for a rod hole site of a roller kiln and the roller kiln. The sealing structure comprises an end cover and a heat insulation self-lubricating piece installed in an end cover installation cavity. A first mounting hole is formed in the end cover, and a second mounting hole is formed in the heat insulation self-lubricating piece; the first mounting hole and the second mounting hole are coaxially arranged to form a mounting hole for a roller bar to pass through; the sealing structure can improve the sealing performance of the roller kiln and reduce nitrogen leakage at rod hole positions; due to the self-lubricating function of the heat-insulating self-lubricating piece, the resistance of the self-lubricating piece to the roller rod can be reduced when the roller rod rotates in the second mounting hole, and the sintering of the negative electrode material is prevented from being influenced; the roller kiln comprises a furnace body, rod hole sites formed in the opposite side walls of the furnace body, a roller rotationally arranged on the furnace body and the sealing structure, wherein the head end and the tail end of the roller penetrate through the rod hole sites, and the vacant sites are filled with heat insulation cotton. The end cover of the sealing structure is attached to the outer wall of the furnace body, and the roller penetrates through the mounting hole; the roller kiln does not need to be manually observed all the time, and the maintenance cost of the roller kiln is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of roller kiln roller structures, in particular to a sealing structure for roller kiln rod holes and a roller kiln. Background Art

[0002] The negative electrode roller kiln is mainly used for the sintering process of negative electrode materials for lithium batteries. The negative electrode materials are placed in the negative electrode roller kiln and sintered and solidified under high temperature conditions to improve the crystallinity and performance of the negative electrode materials, thereby improving the electrochemical performance of lithium batteries.

[0003] During the production process of the negative electrode roller kiln, nitrogen needs to be continuously injected into the roller kiln to protect the sintering process of the product in the kiln. Therefore, it is very important to ensure that the nitrogen in the kiln reduces leakage. One of the nitrogen leakage points of the roller kiln is the rod hole position of the roller rod on the furnace body.

[0004] In order to reduce nitrogen leakage in rod holes, the prior art adopts the method of filling insulation cotton at the installation position; however, the insulation cotton is fluffy and has many gaps, which can easily lead to a large amount of nitrogen leakage; and there are many rollers and rod holes in the roller kiln. The insulation cotton is consumed in large quantities due to the high temperature during the operation of the negative electrode kiln. In order to prevent nitrogen leakage, the only way is to manually check the hot cotton filling condition of each rod hole and plug the insulation cotton; this not only has high labor costs and high frequency of cotton filling, but also has poor effect in preventing nitrogen leakage. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a sealing structure capable of reducing nitrogen leakage at rod holes in a roller kiln and a roller kiln with good nitrogen leakage prevention effect and low maintenance cost.

[0006] The first technical solution adopted by the utility model to solve its technical problem is:

[0007] A sealing structure for a roller kiln rod hole, comprising an end cover, a mounting cavity is provided in the end cover, and a heat-insulating self-lubricating part is installed in the mounting cavity;

[0008] The end cover is provided with a first mounting hole, and the heat-insulating self-lubricating component is provided with a second mounting hole;

[0009] The first mounting hole and the second mounting hole are coaxially arranged to form a mounting hole, and the mounting hole is used for the roller bar to pass through.

[0010] In the sealing structure as described above, the heat-insulating self-lubricating component is a component made of graphite.

[0011] The sealing structure as described above, wherein the end cover comprises a first end cover and a second end cover;

[0012] The first end cover and the second end cover are combined to form the first mounting hole.

[0013] In the sealing structure as described above, the first end cover is semi-arc-shaped; and the second end cover is semi-arc-shaped.

[0014] The sealing structure as described above further comprises a mounting member provided on the end cover, and the mounting member is used to mount the sealing structure on the roller kiln.

[0015] The second technical solution adopted by the utility model to solve its technical problem is:

[0016] A roller kiln comprises: a furnace body, rod holes provided on the side walls opposite to the furnace body, rollers provided at both ends through the rod holes, and the above-mentioned sealing structure; the rollers are provided on the furnace body and rotate with their axes as the rotation center; the rod holes are filled with heat insulation cotton; the end covers of the sealing structure are provided in contact with the outer wall of the furnace body, and the rollers are provided through the mounting holes.

[0017] The roller kiln as described above, wherein the heat insulating wool is ceramic fiber wool.

[0018] In the roller kiln as described above, the outer diameter of the end cover is larger than the inner diameter of the rod hole.

[0019] In the roller kiln as described above, the end cover and the furnace body jointly clamp the heat-insulating self-lubricating component.

[0020] In the roller kiln as described above, the inner diameter of the mounting hole is equal to the diameter of the roller.

[0021] The beneficial effects of the utility model are:

[0022] An installation cavity is arranged in the end cover of the sealing structure, and a heat-insulating self-lubricating component is arranged in the installation cavity; when used, it is used as a sealing component to improve the sealing performance of the roller kiln and reduce the leakage of nitrogen at the rod holes in the roller kiln; and the heat-insulating self-lubricating component has a self-lubricating function, which can reduce the resistance of the self-lubricating component to the roller rod when the roller rod rotates in the second installation hole, thereby avoiding the influence of the sealing structure setting on the sintering of the negative electrode material; the roller kiln with the above sealing structure can seal the heat-insulating cotton in the rod holes therein, change the singleness of the sealing form of the roller rod holes of the negative electrode kiln, improve the sealing performance of the rod holes, avoid the leakage of nitrogen, do not need manual observation at all times, and reduce the maintenance cost of the roller kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 is a three-dimensional diagram of the sealing structure in this embodiment;

[0025] Figure 2 This is one of the structural disassembly diagrams of the sealing structure in this embodiment;

[0026] Figure 3 This is the second structural disassembly diagram of the sealing structure in this embodiment;

[0027] Figure 4 is a three-dimensional diagram of the roller kiln in this embodiment;

[0028] Figure 5 yes Figure 4 Section view of the AA plane. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0030] Reference Figure 1-3 A sealing structure for a roller kiln rod hole comprises an end cover 11, a mounting cavity 12 is provided in the end cover 11, and a heat-insulating self-lubricating part 13 is installed in the mounting cavity 12;

[0031] The end cover 11 is provided with a first mounting hole 141, and the heat-insulating self-lubricating component 13 is provided with a second mounting hole 142;

[0032] The first mounting hole 141 and the second mounting hole 142 are coaxially arranged to form a mounting hole 14 , and the mounting hole 14 is used for the roller bar 2 to pass through.

[0033] The temperature of the roller kiln needs to be kept above 1300 degrees Celsius for a long time during operation. The uninterrupted operation of the rollers will cause the heat insulation cotton in the roller holes to move due to the high temperature and the operation of the rollers, resulting in the consumption of the heat insulation cotton and the increase of the gap between the cottons, which will increase the leakage of nitrogen in the furnace body.

[0034] The utility model arranges an installation cavity in the end cover of the sealing structure, and arranges a heat-insulating self-lubricating component in the installation cavity; when used, the heat-insulating self-lubricating component is used as a sealing component to improve the sealing performance of the roller kiln and reduce nitrogen leakage at the rod hole position in the roller kiln; and the heat-insulating self-lubricating component has a self-lubricating function, which can reduce the resistance of the self-lubricating component to the roller rod when the roller rod rotates in the second installation hole, thereby avoiding the influence of the setting of the sealing structure on the sintering of the negative electrode material.

[0035] Furthermore, the heat-insulating self-lubricating component 13 is a component made of graphite;

[0036] Graphite has the advantage of high temperature resistance;

[0037] The roller will rub against the graphite during operation, and the falling graphite powder will fill the gap between the roller and the rod hole, forming a graphite layer attached to the outer surface of the roller. The graphite layer and the graphite layer on the thermal insulation self-lubricating part 13 form friction between the graphite and the graphite during operation of the roller. The bonding force between the graphite layers is weak and it is easy to slide relative to each other, so that the thermal insulation self-lubricating part 13 has the function of self-lubricating. In addition, the advantage of the thermal insulation self-lubricating part 13 being made of graphite is that when a large amount of black dust appears on the outside of the sealing structure, the operator can know that the graphite ring in the sealing structure is worn out and the thermal insulation cotton in the roller kiln is exhausted, and timely replacement and maintenance are required.

[0038] Further, the end cover 11 includes a first end cover 111 and a second end cover 112;

[0039] The first end cover 111 and the second end cover 112 are combined to form the first mounting hole 141, so as to facilitate the installation and debugging of the end cover 11 and improve the efficiency of replacing the self-lubricating heat insulating member 13; and the split design only requires replacing one of the first end cover 111 or the second end cover 112 when one of them is damaged, thus avoiding waste of resources.

[0040] Specifically, the first end cover 111 is semi-arc-shaped; the second end cover 112 is semi-arc-shaped.

[0041] Furthermore, the sealing structure further comprises a mounting member 15 disposed on the end cover 11, and the mounting member 15 is used to mount the sealing structure on the roller kiln to improve the stability of the sealing structure when mounted on the roller kiln.

[0042] Specifically, the mounting member 15 is a conventional fixing member such as a screw or a bolt.

[0043] A roller kiln, comprising:

[0044] Furnace body 3;

[0045] A rod hole 31 is provided on the side wall opposite to the furnace body 3; the rod hole 31 is filled with heat insulation cotton 32;

[0046] The roller rod 2 has its head and tail ends passing through the rod hole 31, and the roller rod 2 is rotatably arranged on the furnace body 3 with its axis as the rotation center;

[0047] In the sealing structure described above, the end cover 11 is arranged in close contact with the outer wall of the furnace body 3 , and the roller 2 is arranged through the installation hole 14 .

[0048] The roller kiln uses the above sealing structure to seal the heat insulation cotton in the rod holes, thereby improving the sealing of the rod holes and avoiding nitrogen leakage. It does not require manual observation at all times, thus reducing the maintenance cost of the roller kiln.

[0049] Furthermore, the thermal insulation cotton 32 is ceramic fiber cotton, which has the advantages of good thermal insulation performance and light weight.

[0050] Furthermore, the outer diameter of the end cover 11 is greater than the inner diameter of the rod hole 31 .

[0051] like Figure 5 As shown, further, the end cover 11 and the furnace body 3 jointly clamp the thermal insulation self-lubricating component 13; specifically, when installing the sealing structure to the roller kiln, the thermal insulation self-lubricating component 13 is first inserted into the roller rod, and finally the first end cover 111 and the second end cover 112 are covered on the thermal insulation self-lubricating component 13, and the installation of the sealing structure is completed.

[0052] Furthermore, the inner diameter of the mounting hole 14 is equal to the diameter of the roller 2 .

[0053] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A sealing structure for roller kiln rod holes, characterized in that: It comprises an end cover (11), wherein a mounting cavity (12) is provided in the end cover (11), and a heat-insulating self-lubricating component (13) is installed in the mounting cavity (12); The end cover (11) is provided with a first mounting hole (141), and the heat-insulating self-lubricating component (13) is provided with a second mounting hole (142); The first mounting hole (141) and the second mounting hole (142) are coaxially arranged to form a mounting hole (14), and the mounting hole (14) is used for the roller rod (2) to pass through.

2. The sealing structure according to claim 1, characterized in that: The heat-insulating self-lubricating component (13) is a component made of graphite.

3. The sealing structure according to claim 1, characterized in that: The end cover (11) comprises a first end cover (111) and a second end cover (112); The first end cover (111) and the second end cover (112) are covered to form the first mounting hole (141).

4. The sealing structure according to claim 3, characterized in that: The first end cover (111) is semi-arc-shaped; the second end cover (112) is semi-arc-shaped.

5. The sealing structure according to claim 1, characterized in that: The sealing structure further comprises a mounting member (15) arranged on the end cover (11), and the mounting member (15) is used to mount the sealing structure on the roller kiln.

6. A roller kiln, characterized in that: include: Furnace body (3); A rod hole (31) is provided on the side wall opposite to the furnace body (3); the rod hole (31) is filled with heat insulation cotton (32); A roller rod (2), the head and tail ends of which pass through the rod hole (31), and the roller rod (2) is rotatably arranged on the furnace body (3) with its axis as the rotation center; According to the sealing structure as described in any one of claims 1 to 5, the end cover (11) is arranged in contact with the outer wall of the furnace body (3), and the roller (2) is arranged through the installation hole (14).

7. The roller kiln according to claim 6, characterized in that: The heat insulating cotton (32) is ceramic fiber cotton.

8. The roller kiln according to claim 6, characterized in that: The outer diameter of the end cover (11) is greater than the inner diameter of the rod hole (31).

9. The roller kiln according to claim 7, characterized in that: The end cover (11) and the furnace body (3) jointly clamp the heat-insulating self-lubricating component (13).

10. The roller kiln according to claim 7, characterized in that: The inner diameter of the mounting hole (14) is equal to the diameter of the roller bar (2).

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