Sealing device and reactor for lithium battery material reaction furnace

Abstract

This invention discloses a sealing device and reactor for a lithium battery material reactor, comprising a first flange, a second flange, an elastic sealing element, and a baffle. The first flange is sealed and fixedly connected to the end face of a transfer furnace, and the second flange is sealed and fitted onto the outside of the reactor, with the second flange located inside the first flange. A first annular groove is formed on the inner wall of the first flange, and a second annular groove is formed on the inner wall of the second flange. The elastic sealing element has a flattened annular body in its center, and its outer peripheral end extends inwardly with a bent positioning portion, which sealably abuts against the stepped surface of the first annular groove. A ball head extends from the inner periphery of the elastic sealing element, sealingly abutting against the stepped surface of the second annular groove. One end of the baffle is connected to the outside of the first flange, and the baffle abuts against the outer wall of the annular body. This invention can withstand high temperature and high pressure, has good sealing performance, and a long service life.

Description

Technical Field

[0001] This invention relates to a sealing device, and more particularly to a sealing device and reactor for a lithium battery material reactor that has good sealing performance and long service life. Background Technology

[0002] In the processing of lithium battery materials, the materials generally need to be fed into a rotary kiln for reaction. Specifically, a transfer furnace and a rotary kiln are nested together, with the rotary kiln rotating relative to the transfer furnace. During processing, the lithium battery materials are fed into the transfer furnace from other equipment, and then the rotating rotary kiln pushes the materials forward using its internal blades. However, the rotary kiln operates under high temperature and pressure conditions. To reduce pressure and heat loss, sealing components are typically installed between the rotary kiln and the transfer furnace to seal the gaps between them. Existing rotary kilns use a multi-seal method, where adjusting screws compress multiple sealing rings, causing each ring to deform radially and make surface contact with the outside of the rotary kiln, thus achieving a seal. However, this method results in a large contact area between the sealing ring and the rotary reactor, leading to significant friction. On one hand, this creates resistance to the rotation of the rotary reactor, increasing the power required by the drive unit and thus consuming more energy. On the other hand, after a period of use, the sealing ring will experience significant wear, resulting in a substantial decrease in sealing performance, a shorter service life, and the need for shutdown for replacement and maintenance, thereby reducing production efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a sealing device for a lithium battery material reactor that can withstand high temperature and high pressure, has good sealing performance, and a long service life.

[0004] Another objective of this invention is to provide a lithium battery material reactor with good sealing performance and long service life.

[0005] To achieve the above objectives, the present invention provides a sealing device for a lithium battery material reactor, used for sealing between a reactor and a transfer furnace. The device includes a first flange, a second flange, an elastic sealing element, and a baffle. The first flange is sealed and fixedly connected to the end face of the transfer furnace. The second flange is sealed and fitted onto the outside of the reactor, with the second flange located inside the first flange. A first annular groove is formed on the inner wall of the first flange, and a second annular groove is formed on the inner wall of the second flange. The elastic sealing element has a flattened annular body in its center, and a positioning portion extends inwardly from its outer periphery, bent inwards. The positioning portion sealably abuts against the stepped surface of the first annular groove. A ball head extends outwards from the inner periphery of the elastic sealing element towards the central axis. The ball head sealably abuts against the stepped surface of the second annular groove. One end of the baffle is connected to the outside of the first flange, and the other end extends towards the central axis into the gap between the first and second flanges, with the baffle abutting against the outer wall of the annular body.

[0006] Compared with the prior art, this invention, by providing a first annular groove on the first flange and a second annular groove on the second flange, and by providing an elastic sealing element between the first and second flanges, achieves a sealed gap between the first and second flanges. The elastic sealing element has an outer peripheral end that bends inward to form a positioning portion, while its inner peripheral end extends outward towards the central axis to form a ball head. The positioning portion presses against the stepped surface of the first annular groove, and the ball head presses against the stepped surface of the second annular groove. Simultaneously, the baffle plate abuts against the elastic sealing element, preventing it from detaching from the first and second flanges due to the high pressure inside the reactor. This also ensures tighter contact between the positioning portion and the stepped surface of the first flange, and between the ball head and the stepped surface of the second flange, facilitating resistance to high temperature and pressure and resulting in excellent sealing performance. Moreover, when the second flange rotates relative to the first flange, the stepped surface of the second flange and the ball head only have line contact or small surface contact, and the friction between them is very small, which will not generate a large resistance to the reactor. This can reduce the driving power, reduce energy consumption, and greatly reduce the wear of the elastic seal, thus greatly extending the service life, effectively improving production efficiency and reducing production costs.

[0007] Preferably, a first connecting portion inclined relative to the annular body is provided between the annular body and the positioning part. By providing the first connecting portion, the positioning part can be made elastic through the first connecting portion when the baffle presses against the annular body, so that the positioning part can elastically contact the stepped surface of the first annular groove. This not only enhances the sealing performance between the positioning part and the stepped surface of the first annular groove, but also protects the elastic seal, preventing it from being excessively pressed and causing severe deformation of the positioning part, thus ensuring the reliability of the seal.

[0008] Specifically, the first annular groove has an inclined abutment surface on the side opposite to the stepped surface within the groove, and this abutment surface abuts against the first connecting portion. When the baffle presses against the annular body, the first connecting portion deforms and is limited and abutted by the abutment surface, thereby generating a counter-thrust force on the annular body. This causes the ball head on the other side of the annular body to come closer to the stepped surface of the second annular groove, which helps to enhance the sealing performance between the ball head and the second annular groove.

[0009] Preferably, the outer peripheral end of the elastic seal extends radially outward to form an insertion portion, and the inner bottom surface of the first annular groove is provided with a slot radially, into which the insertion portion is inserted. By utilizing the cooperation between the insertion portion and the slot, when the elastic seal is subjected to pressure from the baffle or internal air pressure, the side of the insertion portion can seal tightly against the inner wall of the slot. This not only enhances the sealing performance between the outer periphery of the elastic seal and the first flange, but also positions and limits the outer periphery of the elastic seal, preventing it from falling off, thereby greatly enhancing the stability of the elastic seal.

[0010] Preferably, a second connecting portion inclined relative to the annular body is provided between the annular body and the ball head. By providing the second connecting portion, the ball head can be made elastic through the second connecting portion when the baffle presses against the annular body, thereby allowing the ball head to elastically contact the stepped surface of the second annular groove and improving the sealing performance.

[0011] Preferably, the outer inner circumference of the elastic seal extends outwardly at an angle toward the central axis to form an elastic foot. The second annular groove has a radially extending contact surface on its side opposite the stepped surface within the groove. The elastic foot is accommodated within the second annular groove and faces the contact surface. By providing the elastic foot, it can promptly make sealing contact with the contact surface when the ball head leaves the stepped surface of the second annular groove, ensuring an effective seal between the elastic seal and the second flange and greatly improving sealing performance.

[0012] Preferably, the baffle is fixedly connected to the outer end face of the first flange by screws. This not only fixes the baffle but also allows adjustment of the distance between the baffle and the annular body, thereby adjusting the pressure applied against the annular body and ultimately adjusting the elastic sealing capability of the elastic seal. The structure is simple and easy to use.

[0013] Preferably, the transfer furnace has a connecting flange on its outer periphery, and the first flange is fixedly connected to the connecting flange by screws, with a sealing gasket between the first flange and the connecting flange. By using the connecting flange, the first flange can be quickly and easily installed on the end face of the transfer furnace body, improving assembly convenience.

[0014] Preferably, a sealing ring is provided between the reactor and the second flange. This prevents leakage between the second flange and the reactor, thereby improving sealing performance and reliability. At least one side of the second flange is provided with a pressure plate, one end of which is connected to the second flange by screws. The sealing ring is disposed between the pressure plate and the side of the second flange, so that it is sealed against the outer surface of the reactor under the pressure of the pressure plate. By providing the pressure plate, a compressive force can be applied to the sealing ring, thereby ensuring the sealing performance between the second flange and the reactor.

[0015] A lithium battery material reactor includes a reactor, a transfer furnace, and a sealing device. One end of the reactor is coaxially connected to one end of the transfer furnace and rotates relative to the transfer furnace. The sealing device is disposed between the reactor and the transfer furnace to seal the gap between them. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the lithium battery material reactor of the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of the sealing device for the lithium battery material reactor of the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the first flange and the second flange of the sealing device for the lithium battery material reactor of the present invention.

[0019] Figure 4 This is a structural diagram of the elastic sealing element of the lithium battery material reactor sealing device of the present invention. Detailed Implementation

[0020] To illustrate the technical content, structural features, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0021] like Figures 1 to 4As shown, the lithium battery material reactor of the present invention includes a reactor 200, a transfer furnace 300, and a lithium battery material reactor sealing device 100. One end of the reactor 200 is coaxially sleeved with one end of the transfer furnace 300 and rotates relative to the transfer furnace 300. The lithium battery material reactor sealing device 100 is disposed between the reactor 200 and the transfer furnace 300 to seal the gap between them. The lithium battery material reactor sealing device 100 includes a first flange 1, a second flange 2, an elastic sealing element 3, and a baffle 4. The first flange 1 is sealed and fixedly connected to the end face of the transfer furnace 300, and the second flange 2 is sealed and sleeved on the outside of the reactor 200 and located inside the first flange 1. The first flange 1 and the second flange 2 are coaxially arranged. A first annular groove 11 is formed on the inner wall of the first flange 1, and a second annular groove 21 is formed on the inner wall of the second flange 2. The elastic seal 3 has a flattened annular body 31 in the middle. A positioning part 32 extends inwardly from the outer periphery of the elastic seal 3 in a bent manner. The positioning part 32 presses against the stepped surface 111 of the first annular groove 11 in a sealing manner. The positioning part 32 has a bent structure with a bending angle of 90 degrees. More specifically, the positioning part 32 first extends axially, then bends 90 degrees radially towards the center, and then bends another 90 degrees axially towards the annular body 31. The stepped surface 111 has an axial surface 111a parallel to the central axis and a radial surface 111b parallel to the diameter direction. The positioning part 32 presses against the stepped surface 111, such that one side of it fits against the axial surface 111a and the other side fits against the radial surface 111b. The inner circumference of the elastic seal 3 is provided with a ball head 34 extending outward toward the central axis; the ball head 34 is sealed against the stepped surface 211 of the second annular groove 21 and is in line contact with the stepped surface 211 of the second annular groove 21. One end of the baffle 4 is connected to the outside of the first flange 1, and the other end of the baffle 4 extends toward the central axis into the gap between the first flange 1 and the second flange 2, and the baffle 4 abuts against the outer wall of the annular body 31.

[0022] Please see again Figures 2 to 4A first connecting portion 35, inclined relative to the annular body 31, is provided between the annular body 31 and the positioning portion 32. Specifically, the distance from the center of the end of the first connecting portion 35 near the positioning portion 32 is greater than the distance from the center of the end near the annular body 31. By providing the first connecting portion 35, the positioning portion 32 becomes elastic when the baffle 4 presses against the annular body 31, allowing the positioning portion 32 to elastically contact the stepped surface 111 of the first annular groove 11. This enhances the sealing between the positioning portion 32 and the stepped surface 111 of the first annular groove 11, and protects the elastic sealing element 3, preventing it from being excessively pressed and causing severe deformation of the positioning portion 32, thus ensuring the reliability of the seal. An inclined abutting surface 112 is provided on the side of the first annular groove 11 opposite to the stepped surface 111 within the groove. The abutting surface 112 mates with the outer surface of the first connecting portion 35 and abuts against the first connecting portion 35. When the baffle 4 presses against the annular body 31, the first connecting part 35 deforms and is limited and pushed by the abutting surface 112, thereby forming a counter-thrust force on the annular body 31, making the ball head 34 on the other side of the annular body 31 closer to the step surface 211 or bottom surface of the second annular groove 21, which is beneficial to enhancing the sealing performance between the ball head 34 and the second annular groove 21.

[0023] Please see again Figures 2 to 4 The outer peripheral end of the elastic seal 3 extends radially outward to form an insertion portion 36. The inner bottom surface of the first annular groove 11 has a radially arranged slot 113, into which the insertion portion 36 is inserted. By utilizing the cooperation between the insertion portion 36 and the slot 113, when the elastic seal 3 is subjected to pressure from the baffle 4 or internal air pressure, the side of the insertion portion 36 can be sealed against the inner wall of the slot 113. This not only enhances the sealing performance between the outer periphery of the elastic seal 3 and the first flange 1, but also positions and limits the outer periphery of the elastic seal 3, preventing it from falling off, thereby greatly enhancing the stability of the elastic seal 3.

[0024] Please see again Figure 4 A second connecting portion 33, inclined relative to the annular body 31, is provided between the annular body 31 and the ball head 34. By providing the second connecting portion 33, the ball head 34 can be made elastic through the second connecting portion 33 when the baffle 4 presses against the annular body 31, thereby allowing the ball head 34 to elastically contact the stepped surface 211 of the second annular groove 21, improving the sealing performance.

[0025] Please see again Figures 2 to 4The elastic seal 3 has an elastic foot 37 extending outward from its outer inner circumference towards the central axis. The second annular groove 21 has a radially extending contact surface 212 on the side opposite to the stepped surface 211 within the groove. The elastic foot 37 is housed within the second annular groove 21 and faces the contact surface 212. By providing the elastic foot 37, it can promptly make sealing contact with the contact surface 212 when the ball head 34 leaves the stepped surface 211 of the second annular groove 21, ensuring effective sealing between the elastic seal 3 and the second flange 2, and greatly improving sealing performance. The annular body 31, first connecting part 35, positioning part 32, insertion part 36, second connecting part 33, ball head 34, and elastic foot 37 are all integrally molded structures and are all made of high-temperature resistant elastic materials, such as elastic silicone or rubber.

[0026] Please see Figure 2 The baffle 4 is fixedly connected to the outer end face of the first flange 1 by screws 41. This not only fixes the baffle 4 but also allows adjustment of the distance between the baffle 4 and the annular body 31, thereby adjusting the pressure applied against the annular body 31 and thus adjusting the elastic sealing capacity of the elastic seal 3. The structure is simple and easy to use. The baffle 4 covers at least half of the gap between the first flange 1 and the second flange 2, thus providing better support for the elastic seal 3.

[0027] Please see again Figure 2 The transfer furnace 300 is provided with a connecting flange 301 on its outer periphery. The first flange 1 is fixedly connected to the connecting flange 301 by screws 1a, and a sealing gasket 1b is provided between the first flange 1 and the connecting flange 301. By using the connecting flange 301, the first flange 1 can be quickly and easily installed on the end face of the transfer furnace 300 body, improving the convenience of assembly.

[0028] Please see again Figure 2 and Figure 3 A sealing ring 2a is provided between the reactor 200 and the second flange 2. This prevents leakage between the second flange 2 and the reactor 200, thereby improving sealing performance and reliability. Specifically, at least one side of the second flange 2 is provided with a pressure plate 2b, one end of which is connected to the second flange 2 by a screw 2c. The sealing ring 2a is disposed between the pressure plate 2b and the side of the second flange 2, so that it deforms radially under the pressure of the pressure plate 2b and seals against the outer side of the reactor 200. By providing the pressure plate 2b, a compressive force can be formed on the sealing ring 2a, thereby ensuring the sealing performance between the second flange 2 and the reactor 200.

[0029] Compared with the prior art, the present invention provides a first annular groove 11 on the first flange 1, a second annular groove 21 on the second flange 2, and an elastic sealing element 3 between the first flange 1 and the second flange 2. The outer periphery of the elastic sealing element 3 extends inwardly in a bent manner to form a positioning portion 32, while the inner periphery extends outwardly towards the central axis. The positioning portion 32 presses against the stepped surface 111 of the first annular groove 11, and the ball head 34 presses against the stepped surface 111 of the second annular groove 21. Therefore, the gap between the first flange 1 and the second flange 2 can be sealed. Simultaneously, the baffle 4 abuts against the elastic sealing element 3, preventing it from detaching from the first flange 1 and the second flange 2 due to the high pressure inside the reactor 200. This also ensures tighter contact between the positioning portion 32 and the stepped surface 111 of the first flange 1, and between the ball head 34 and the stepped surface 111 of the second flange 2, which is beneficial for withstanding high temperature and high pressure, resulting in excellent sealing performance. Moreover, when the second flange 2 rotates relative to the first flange 1, the step surface 111 of the second flange 2 and the ball head 34 are only in line contact or have a small surface contact. The friction between them is very small and will not generate a large resistance to the reactor 200. This can reduce the driving power, reduce energy consumption, and greatly reduce the wear of the elastic seal 3, thus greatly extending the service life, effectively improving production efficiency and reducing production costs.

[0030] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention shall still fall within the scope of the present invention.

Claims

1. A sealing device for a lithium battery material reactor, used for sealing the space between the reactor and the transfer furnace, characterized in that: The system includes a first flange, a second flange, an elastic seal, and a baffle. The first flange is sealed and fixedly connected to the end face of the transfer furnace. The second flange is sealed and fitted onto the outside of the reactor, with the second flange located inside the first flange. A first annular groove is formed on the inner wall of the first flange, and a second annular groove is formed on the inner wall of the second flange. The elastic seal has a flattened annular body in the middle, and its outer periphery extends inwardly with a locating portion, which sealably presses against the stepped surface of the first annular groove. A ball head extends outwardly from the inner periphery of the elastic seal towards the central axis; the ball head sealably presses against the stepped surface of the second annular groove. One end of the baffle is connected to the outside of the first flange, and the other end extends towards the central axis to the area between the first flange and the reactor. The gap between the second flanges, and the baffle abuts against the outer wall of the annular body; a first connecting part inclined relative to the annular body is provided between the annular body and the positioning part; a second connecting part inclined relative to the annular body is provided between the annular body and the ball head; an inclined abutting surface is provided on the side of the first annular groove opposite to the stepped surface in the groove, and the abutting surface abuts against the first connecting part; an insertion part extends radially outward from the outer peripheral end of the elastic seal, and a slot is provided radially on the inner bottom surface of the first annular groove, and the insertion part is inserted into the slot; an elastic foot extends outwardly inclined from the inner peripheral side of the outer side of the elastic seal toward the central axis, and a radially extending contact surface is provided on the side of the second annular groove opposite to the stepped surface in the groove, and the elastic foot is accommodated in the second annular groove and opposite to the contact surface.

2. The sealing device for the lithium battery material reactor as described in claim 1, characterized in that: The baffle is fixedly connected to the outer end face of the first flange by screws.

3. The sealing device for the lithium battery material reactor as described in claim 1, characterized in that: The transfer furnace is provided with a connecting flange on its outer periphery. The first flange is fixedly connected to the connecting flange by screws, and a sealing gasket is provided between the first flange and the connecting flange.

4. The sealing device for the lithium battery material reactor as described in claim 1, characterized in that: A sealing ring is provided between the reactor and the second flange; a pressure plate is provided on at least one side of the second flange, one end of the pressure plate is connected to the second flange by screws, and the sealing ring is disposed between the pressure plate and the side of the second flange so as to seal against the outer side of the reactor under the pressure of the pressure plate.

5. A lithium battery material reactor, characterized in that: The invention includes a reactor, a transfer furnace, and a sealing device as described in any one of claims 1 to 4, wherein one end of the reactor is coaxially connected to one end of the transfer furnace and rotates relative to the transfer furnace, and the sealing device is disposed between the reactor and the transfer furnace to seal the gap between them.

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