Sealing device of horizontal high-temperature coating kettle

Abstract

The utility model provides a sealing device of a horizontal high-temperature coating kettle, which comprises an equipment main shaft and a shaft sleeve sleeved on the outer side of the main shaft, the shaft sleeve is sequentially provided with a water tank, a sealing box and a bearing frame from a medium side to an atmosphere side, and a double-end sealing component is arranged in the sealing box. The transition box is connected between the sealing box and the bearing frame in a pressing mode, media leaked from the double-end sealing assembly can be stored, and the media are prevented from leaking into the bearing seat again; the side wall of the transition box is provided with the discharging port and the ventilation port, and the medium in the transition box can be regularly cleaned through the discharging port. The first sealing piece, the second sealing piece, the double-end sealing assembly and the third sealing piece are sequentially arranged from the medium end to the atmosphere end of the shaft sleeve, so that medium leakage generated in the reaction process can be effectively prevented, and even if the sealing capacity of the double-end sealing assembly is reduced due to expansion caused by heat and contraction caused by cold or long-term use, the double-end sealing assembly can be sealed. The sealing device can also be used for sealing leaked media, and the service life of the sealing device is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to a sealing device, in particular to a sealing device for a horizontal high-temperature coating kettle. Background Art

[0002] The horizontal high-temperature coating kettle is a common reaction equipment, which is often used in the material processing and synthesis in the industrial field, such as the coating and granulation of lithium battery negative electrode materials. During the reaction process, the coating kettle will produce a large amount of solid and liquid media, which need to be isolated in the kettle body by a sealing device to prevent the media from leaking into the atmosphere or affecting the normal operation of electrical components. The sealing device used in the existing coating kettle generally includes two sealing end faces composed of a dynamic ring and a static ring arranged along the axial direction of the main shaft. The dynamic ring is located on the inner side and the static ring is located on the outer side. The dynamic ring maintains dynamic contact with the static ring through a compression spring. Compared with conventional reactors, the special feature of high-temperature coating kettles is that the operating temperature is very high. The sleeve, compression spring and other functional components in the sealing device will deform due to thermal expansion and contraction in a high temperature environment. After long-term use, the sealing device will produce axial movement on the main shaft, and the sealing end face will also become loose, which will affect the sealing ability and service life of the sealing device. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a sealing device for a horizontal high-temperature coating kettle, comprising a main shaft of the equipment and a sleeve sleeved on the outside of the main shaft. The sleeve is provided with a water tank, a sealing box, a transition box and a bearing frame in sequence from the medium side to the atmosphere side. A double-end sealing assembly is provided in the sealing box, and the bearing frame is connected to the sleeve via a bearing provided therein.

[0004] The transition box is press-fitted between the bearing frame and the sealing box, and a second discharge port and a vent are installed on the side wall of the transition box;

[0005] A transmission block is provided on the atmospheric side of the sleeve, one end of the transmission block is fixedly connected to the main shaft, an axially extending keyway is provided on the outer side of the end of the sleeve, and one end of the transmission block has a head extending into the keyway.

[0006] Furthermore, the shaft sleeve is further provided with an end gland on the medium side, and the water tank is press-connected between the end gland and the side plate of the sealing box on the medium side.

[0007] Furthermore, a floating ring seal is provided on the outer side of the sleeve at a position of the end gland close to the water tank, a disc spring is provided inside the end gland, and a bearing surface of the disc spring is connected to the floating ring seal.

[0008] Furthermore, a second sealing member is installed outside the shaft sleeve between the water tank and the sealing box.

[0009] Furthermore, a third sealing member is provided on the outer side of the shaft sleeve at a position of the bearing frame close to the transition box 15 .

[0010] Furthermore, the inner cavity of the sealed box is enclosed by the main box body and the connecting end covers located on both sides of the main box body. A cooling chamber is provided around the outer side of the main box body, and a second water inlet and a second water outlet are provided on the side wall of the cooling chamber.

[0011] Furthermore, the double-end sealing assembly includes a dynamic ring seat arranged on the shaft sleeve and two dynamic rings, two intermediate rings, and two static rings arranged on both sides of the dynamic ring seat in sequence; the dynamic ring is elastically connected to the dynamic ring seat, the static ring is arranged on the outside of the dynamic ring, the intermediate ring is arranged between the dynamic ring and the static ring, and one end of the intermediate ring is in contact with the static ring to form a sealing end face.

[0012] Furthermore, the dynamic ring seat includes a positioning ring fixedly connected to the shaft sleeve and push rings connected to both sides of the positioning ring. A compression spring is connected between the push ring and the positioning ring. Driven by the compression spring, the push ring applies a clamping force to the dynamic ring.

[0013] Furthermore, the compression spring is a spring tube that penetrates the connection positioning ring, and the two ends of the spring tube are respectively connected to two sets of push rings.

[0014] This utility model provides a sealing device for a horizontal high-temperature coating reactor. The device comprises a main shaft and a sleeve sleeved outside the main shaft. The sleeve is provided with a water tank, a sealing box, and a bearing frame, arranged in sequence from the medium side to the atmosphere side. The sealing box houses a double-end sealing assembly. A transition box is crimped between the sealing box and the bearing frame to store media leaking from the double-end sealing assembly, preventing further leakage into the bearing seat. A discharge port and a vent are installed on the sidewalls of the transition box, allowing the medium inside the transition box to be regularly cleaned through the discharge port.

[0015] The utility model is provided with a first seal, a second seal, a double-end seal assembly and a third seal in sequence from the medium end to the atmosphere end of the sleeve, which can effectively prevent leakage of the medium generated during the reaction process. Even if the sealing ability of the double-end seal assembly decreases due to thermal expansion and contraction or long-term use, the utility model can still seal the leaked medium, effectively extending the life of the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a sealing device for a horizontal high-temperature coating kettle of the present invention;

[0017] Figure 2 It is a structural diagram of a double-end sealing component.

[0018] Figure numerals: main shaft 1, sleeve 2, dynamic ring 3, intermediate ring 4, static ring 5, positioning ring 6, push ring 7, compression spring 8, wedge ring 9, water tank 10, sealing box 11, bearing frame 12, end pressure cover 13, transmission block 14, transition box 15, first water inlet 16, first water outlet 17, first discharge port 18, second discharge port 19, vent 20, cooling chamber 21, second water inlet 22, second water outlet 23, first seal 24, second seal 25, third seal 26, disc spring 27, keyway 28. DETAILED DESCRIPTION

[0019] like Figure 1 The sealing device for a horizontal, high-temperature coating reactor is shown. It is used to seal the reactor opening to prevent leakage of fixed powder generated by the reaction within the reactor. It comprises a main shaft 1, a sleeve 2 that fits around the main shaft 1, and a double-end seal assembly that surrounds the sleeve 2. The double-end seal assembly used in high-temperature reactors uses existing technology. It is divided into a medium-side and an atmospheric-side seal based on its proximity to the reactor. It comprises a dynamic ring seat mounted around the sleeve 2, two dynamic rings 3, two intermediate rings 4, and two static rings 5, positioned on either side of the dynamic ring seat.

[0020] The rotating ring 3 is connected to the rotating ring seat, the stationary ring 5 is positioned outside the rotating ring 3, and the intermediate ring 4 is positioned between the two rings. The two sets of rotating rings 3, stationary rings 5, and intermediate rings 4 together form two sets of end-face seals on either side of the rotating ring seat. One end of the intermediate ring 4 contacts the rotating ring 3 and features an inclined spherical contact surface, ensuring a tight fit between the intermediate ring 4 and the rotating ring 3 even when the shaft diameter swings in any direction. The other end of the intermediate ring 4 contacts the end face of the stationary ring 5, forming a set of sealing surfaces that meet sealing standards on both the medium side and the atmosphere side.

[0021] The dynamic ring seat comprises a locating ring 6 bolted to the sleeve 2 and push rings 7 connected to either side. A compression spring 8 is connected between the push rings 7 and the locating ring 6. The dynamic ring 3 is positioned outside the push ring 7. Driven by the compression spring 8, the push ring 7 applies a compressive force to the dynamic ring 3, pushing the dynamic ring 3 and the intermediate ring 4 into contact with the surface of the stationary ring 5, providing dynamic compensation for the sealing end faces. The compression spring 8 is preferably a single compression spring 8 tube that extends through the locating ring 6. The ends of the compression spring 8 tube are connected to the two sets of push rings 7, respectively. The same compression spring 8 controls the end-face pressure ratio of the two sealing assemblies. Because the center of the compression spring 8 is fixed, the end-face pressure ratio of the compression spring 8 is not affected when the sleeve 2 extends relative to the main shaft 1. Furthermore, a wedge ring 9 extends from the end of the push ring 7. This wedge ring 9 has an inclined surface that aligns with the surface of the dynamic ring 3, providing triangular support for the dynamic ring 3 and ensuring more stable spherical contact between the dynamic ring 3 and the intermediate ring 4.

[0022] The shaft sleeve 2 is provided with a water tank 10, a sealing box 11, and a bearing frame 12 in sequence along its circumference from the medium side to the atmosphere side. The bearing frame 12 is connected to the shaft sleeve 2 via a spherical roller bearing disposed therein, and has high precision. The water tank 10 is filled with cooling water, and a first water inlet 16 and a first water outlet 17 are provided on the outside of the water tank 10 to cool the gas and solids entering the entire sealing device. The double-end sealing assembly is disposed within the sealing box 11, and the two stationary rings 5 of the double-end sealing assembly are connected to the inside of the sealing box 11. The present invention also provides a transition box 15 on the outside of the shaft sleeve 2. The two ends of the transition box 15 are connected to the bearing frame 12 and the sealing box 11, respectively. Fixed media leaking from the double-end sealing assembly will be collected in the transition box 15. A second discharge port 19 and an air vent 20 are provided on the outer wall of the transition box 15, and a ball valve is installed at the second discharge port 19. After the sealing device has been working for a period of time, the vent 20 is connected to the external air source, gas is introduced into the transition box 15 and the ball valve is opened. The solid medium in the transition box 15 is blown by the air flow and discharged from the second discharge port 19 without entering the bearing frame 12 and affecting the normal operation of the bearing.

[0023] Specifically, the inner cavity of the sealed box 11 is enclosed by the main box body and the connecting end caps located on both sides of the main box body. The outer side of the main box body is fixed to the connecting end caps by bolts, and the static ring 5 is also fixed to the connecting end caps on both sides by bolts. A cooling chamber 21 is arranged around the outer side of the main box body. The side walls of the cooling chamber 21 define a second water inlet 22 and a second water outlet 23. Circulating water is introduced into the cooling chamber 21 to cool the sealed box 11 and the double-end seal assembly within the sealed box 11. Furthermore, a first discharge port 18 is provided in the side walls of the main box body, connecting to the chamber, allowing the medium within the sealed box 11 to be discharged from the sealed box 11.

[0024] The shaft sleeve 2 is further provided with an end gland 13 on the medium side. The water tank 10 is crimped between the end gland 13 and the connecting end cover on the medium side of the sealing box 11. The transition box 15 is crimped between the side of the bearing frame 12 and the connecting end cover on the atmosphere side of the sealing box 11. The water tank 10, the sealing box 11, the transition box 15 and the bearing frame 12 form a complete sealing whole. Once the end gland 13 is installed on the equipment, the sealing device can start working.

[0025] Furthermore, a first seal 24 is provided on the outside of the sleeve 2 at a position near the water tank 10 on the end gland 13. The first seal 24 preferably adopts a floating ring seal. A disc spring 27 is provided in the end gland 13. The bearing surface of the disc spring 27 is connected to the floating ring seal, which pushes the floating ring seal to contact the sleeve 2, thereby providing preliminary sealing protection for the medium on the medium side.

[0026] Furthermore, a second seal 25 is installed between the water tank 10 and the sealing box 11 to reduce the amount of medium entering the sealing box 11. The second seal 25 is preferably a pan-seal with a certain elasticity, which can be adjusted along with the axial extension of the sealing box 11 to ensure a certain sealing ability.

[0027] Furthermore, a third seal 26 is provided on the outside of the shaft sleeve 2, near the transition box 15 on the bearing frame 12. The third seal 26 is preferably a special seal for sealing the medium in the transition box 15. The third seal 26 uses a skeleton seal or a special rubber-plastic seal to reduce leakage of the medium into the bearing frame 12 and provide enhanced protection for the medium.

[0028] As described in the background, the sleeve 2 deforms due to thermal expansion and contraction, resulting in axial positional offset on the main shaft 1. To reduce this offset, conventional techniques employ a bellows on the medium side to dynamically compensate for this axial offset. In this embodiment, a transmission block 14 is provided on the atmospheric side of the sleeve 2. One end of the transmission block 14 is fixedly connected to the main shaft 1 via a set screw. An axially extending keyway 28 is defined on the outer side of the sleeve 2, and one end of the transmission block 14 has a head that extends into the keyway 28. This transmission block 14 allows the main shaft 1 to slide within the sleeve 2 without affecting the sealing performance of the sealing device.

[0029] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A sealing device for a horizontal high-temperature coating kettle, characterized in that: The invention comprises a main shaft (1) of the equipment and a shaft sleeve (2) sleeved on the outside of the main shaft (1); the shaft sleeve (2) is provided with a water tank (10), a sealing box (11), a transition box (15) and a bearing frame (12) in sequence from the medium side to the atmosphere side; a double-end sealing assembly is provided in the sealing box (11); and the bearing frame (12) is connected to the shaft sleeve (2) via a bearing provided therein; The transition box (15) is pressed between the bearing frame (12) and the sealing box (11), and a second discharge port (19) and a vent (20) are installed on the side wall of the transition box (15); A transmission block (14) is provided on the atmospheric side of the shaft sleeve (2), one end of the transmission block (14) is fixedly connected to the main shaft (1), an axially extending keyway (28) is provided on the outer side of the end of the shaft sleeve (2), and one end of the transmission block (14) has a head extending into the keyway (28).

2. The sealing device for a horizontal high-temperature coating reactor according to claim 1, characterized in that: The shaft sleeve (2) is further provided with an end gland (13) on the medium side, and the water box (10) is pressed between the end gland (13) and the side plate of the sealing box (11) on the medium side.

3. The sealing device for a horizontal high-temperature coating reactor according to claim 2, characterized in that: A floating ring seal is provided on the outside of the shaft sleeve (2) at a position of the end gland (13) close to the water tank (10), and a disc spring (27) is provided inside the end gland (13). The bearing surface of the disc spring (27) is connected to the floating ring seal.

4. The sealing device for a horizontal high-temperature coating reactor according to claim 2, wherein: A second sealing member (25) is installed between the water box (10) and the sealing box (11) on the outside of the shaft sleeve (2).

5. The sealing device for a horizontal high-temperature coating reactor according to claim 2, characterized in that: A third sealing member (26) is provided on the outer side of the shaft sleeve (2) at a position of the bearing frame (12) close to the transition box (15).

6. The sealing device for a horizontal high-temperature coating reactor according to claim 2, characterized in that: The inner cavity of the sealed box (11) is enclosed by a main box body and connecting end covers located on both sides of the main box body. A cooling chamber (21) is provided around the outer side of the main box body. A second water inlet (22) and a second water outlet (23) are provided on the side wall of the cooling chamber (21).

7. The sealing device for a horizontal high-temperature coating reactor according to claim 2, characterized in that: The double-end sealing assembly comprises a dynamic ring seat arranged on a shaft sleeve (2), two dynamic rings (3), two intermediate rings (4), and two static rings (5) arranged on both sides of the dynamic ring seat in sequence; the dynamic ring (3) is elastically connected to the dynamic ring seat, the static ring (5) is arranged on the outer side of the dynamic ring (3), the intermediate ring (4) is arranged between the dynamic ring (3) and the static ring (5), and one end of the intermediate ring (4) contacts the static ring (5) to form a sealing end face.

8. The sealing device for a horizontal high-temperature coating reactor according to claim 7, characterized in that: The dynamic ring seat comprises a positioning ring (6) fixedly connected to the shaft sleeve (2) and a push ring (7) connected to both sides of the positioning ring (6); a compression spring (8) is connected between the push ring (7) and the positioning ring (6); and the push ring (7) applies a pressing force to the dynamic ring (3) under the drive of the compression spring (8).

9. The sealing device for a horizontal high-temperature coating reactor according to claim 8, characterized in that: The compression spring (8) is a spring tube that penetrates the connection positioning ring (6), and the two ends of the spring tube are respectively connected to two sets of push rings (7).

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