Sealing structure for stirring rotor and tower bottom of reaction tower

Abstract

The utility model discloses a sealing structure for a stirring rotor and a tower bottom of a reaction tower, which belongs to the technical field of reaction tower sealing and comprises a tower body end socket, a connecting seat arranged at the bottom of the tower body end socket, a connecting seat flange arranged at the top of the connecting seat, a tower body flange arranged between the tower body end socket and the connecting seat flange, and a rotating shaft arranged in the middle of the connecting seat. A stirring rotor hub is arranged at the top of the rotating shaft, a lower sealing assembly is arranged at the top of the connecting base flange, an upper sealing piece is arranged at the top of the lower sealing assembly, a metal ring is arranged at the top of the upper sealing piece, and the top of the metal ring is connected with the bottom of the stirring rotor hub. Balancing is achieved through the cavity elastic body according to the air source pressure and the material amount, it is only needed to replace the coupled friction plate when equipment is overhauled at the end of the year, manpower and overhaul time can be reduced, and continuous work of a production line is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of reaction tower sealing technology, and in particular to a sealing structure between the reaction tower feed rotor and the bottom of the tower. Background Technology

[0002] The reaction tower is a key piece of equipment in chemimechanical pulping, consisting of the tower body, tower bottom, feed rotor, and supports. As the storage and reaction vessel, the tower body is crucial due to its height, large diameter, and large storage capacity; therefore, its normal operation is paramount. One requirement for normal operation is the proper functioning of the feed rotor and the absence of leaks at the seals. This ensures that the processed materials are treated effectively, and the rotor's rotational speed controls the material's residence time within the tower. The residence time determines whether the pulp meets the relevant parameters for paper production.

[0003] The existing reaction tower feed rotor uses a two-stage packed packing seal. The first stage seal is a packing seal located on the outside of the tower bottom. Regular inspection and pre-tightening based on equipment operation can prevent leakage. However, the second stage seal is also a packing seal, located inside the tower, making observation inconvenient. Although periodic inspection and pre-tightening are possible, the operation is very inconvenient, resulting in high labor costs and long maintenance times, significantly impacting production. Therefore, we propose a sealing structure between the reaction tower feed rotor and the tower bottom to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Therefore, the purpose of this utility model is to provide a sealing structure between the feed rotor and the bottom of the reaction tower, which can solve the problem that the existing sealing equipment at the feed rotor of the reaction tower is inconvenient to inspect and operate when the packing seal is inside the tower body during inspection and periodic pre-tightening.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a sealing structure for a reaction tower feed rotor and the tower bottom, comprising a tower body head, a connecting seat at the bottom of the tower body head, a connecting seat flange at the top of the connecting seat, a tower body flange between the tower body head and the connecting seat flange, a rotating shaft in the middle of the connecting seat, a feed rotor hub at the top of the rotating shaft, a lower sealing assembly at the top of the connecting seat flange, an upper sealing element at the top of the lower sealing assembly, a metal ring at the top of the upper sealing element, the top of the metal ring being in contact with the bottom of the feed rotor hub, a sealing groove being formed on the bottom surface of the metal ring in contact with the upper sealing element, and an upper sealing ring being formed in the sealing groove; a sealing groove being formed on the upper surface of the connecting seat flange in contact with the tower body flange, and a lower sealing ring being formed in the sealing groove.

[0007] The lower sealing assembly includes a friction plate, a positioning screw, a lower sealing seat, and a cavity elastomer. The lower sealing seat is located at the top of the connecting seat flange. The lower sealing seat has a groove in which the cavity elastomer is disposed. The friction plate is located at the top of the cavity elastomer. The positioning screw passes through the friction plate laterally, and the screw end of the positioning screw is close to the side wall of the lower sealing seat. The bottom of the cavity elastomer is provided with an air inlet that passes through the lower sealing seat and the connecting seat flange.

[0008] Optionally, the top of the connecting seat is provided with a first water inlet hole, the bottom of the feed rotor hub is provided with a second water inlet hole, and the first water inlet hole and the second water inlet hole are located inside the lower sealing assembly and the upper sealing member, and the partition plate inside the feed rotor hub is provided with a through hole.

[0009] Based on the above technical features, the dilution water outside the tower body enters the sealing chamber composed of the lower sealing component and the upper sealing component through the first water inlet hole, and then enters the interior of the feeding rotor hub through the second water inlet hole. It is distributed in the inner cavity of the feeding rotor hub through the through hole, which facilitates the use of nozzles and other equipment connected to the feeding rotor hub to spray it out and mix with the material inside the tower body.

[0010] Optionally, the upper seal is connected to the metal ring by first bolts evenly arranged in the circumferential direction.

[0011] Based on the above technical features, the first bolt is used to fix the upper seal and the metal ring.

[0012] Optionally, the lower sealing seat and the connecting seat flange are connected by second bolts evenly arranged in the circumferential direction.

[0013] Based on the above technical features, a second bolt is used to fix the lower sealing seat and the connecting seat flange.

[0014] Optionally, the connecting seat flange and the tower body flange are connected by a third bolt evenly arranged in the circumferential direction.

[0015] Based on the above technical features, a third bolt is used to fix the connection between the connecting seat flange and the tower body flange.

[0016] Optionally, a limiting groove is provided on the side wall of the lower sealing seat, the nut portion of the positioning screw is located in the limiting groove, and the width of the limiting groove is the same as the diameter of the nut of the positioning screw.

[0017] Based on the above technical features, while ensuring that the positioning screw is unrestricted in the vertical direction, the lateral movement of the positioning screw is restricted, that is, the rotation of the friction plate is restricted.

[0018] In summary, this utility model has the following beneficial effects:

[0019] In this application, the sealing process mainly involves filling the cavity elastomer with air. A ring-shaped friction plate is placed on top of the cavity elastomer and coupled with the upper seal under the hub of the feed rotor. The cavity elastomer can achieve balance according to the air source pressure and the amount of material. During the year-end equipment overhaul, the coupled friction plate can be replaced, which can reduce manpower and maintenance time and ensure continuous operation of the production line. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This utility model Figure 1 A magnified view of part A.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Tower body end cap; 2. Connecting seat; 201. First water inlet hole; 3. Connecting seat flange; 4. Tower body flange; 5. Rotating shaft; 6. Feeding rotor hub; 601. Second water inlet hole; 602. Through hole; 7. Lower sealing assembly; 701. Friction plate; 702. Positioning screw; 703. Lower sealing seat; 7031. Limiting groove; 704. Cavity elastomer; 705. Air inlet; 8. Upper sealing element; 9. Metal ring; 10. Upper sealing ring; 11. Lower sealing ring; 12. First bolt; 13. Second bolt; 14. Third bolt. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0026] Reference Figure 1-2 This utility model discloses a sealing structure between a reaction tower feeder rotor and the tower bottom. The sealing structure includes a tower body head 1, a connecting seat 2 at the bottom of the tower body head 1, a connecting seat flange 3 at the top of the connecting seat 2, and a tower body flange 4 between the tower body head 1 and the connecting seat flange 3. The connecting seat flange 3 and the tower body flange 4 are connected by a third bolt 14 evenly arranged in the circumferential direction. The third bolt 14 is used to fix the connecting seat flange 3 and the tower body flange 4. A rotating shaft 5 is arranged in the middle of the connecting seat 1, and a feeder rotor hub 6 is arranged at the top of the rotating shaft 5. The rotating shaft 5 can drive the feeder rotor hub 6 to rotate. Existing nozzles, agitators, and other equipment can be installed on the outside of the feeder rotor hub 6.

[0027] A lower sealing assembly 7 is provided on the top of the connecting flange 3, and an upper sealing element 8 is provided on the top of the lower sealing assembly 7. A metal ring 9 is provided on the top of the upper sealing element 8, and the top of the metal ring 9 is in contact with the bottom of the feed rotor hub 6. A sealing groove is opened on the bottom surface of the metal ring 9 that contacts the upper sealing element 8, and an upper sealing ring 10 is provided in the sealing groove. The metal ring 9 and the upper sealing element 8 form a sealing structure to prevent the mixed liquid inside the tower from flowing back and leaking from here. The upper sealing element 8 and the metal ring 9 are connected by first bolts 12 evenly arranged in the circumferential direction. The first bolts 12 are used to fix the upper sealing element 8 and the metal ring 9.

[0028] A sealing groove is provided on the upper surface of the connecting flange 3 where it contacts the tower body flange 4, and a lower sealing ring 11 is installed in the sealing groove. The connecting flange 3 and the tower body flange 4 form a sealing structure to prevent the mixed liquid inside the tower from flowing back and leaking from this point. The lower sealing seat 703 and the connecting flange 3 are connected by second bolts 13 evenly arranged in the circumferential direction. The second bolts 13 are used to fix the lower sealing seat 703 and the connecting flange 3.

[0029] The lower sealing assembly 7 includes a friction plate 701, a positioning screw 702, a lower sealing seat 703, and a cavity elastomer 704. The lower sealing seat 703 is located at the top of the connecting flange 2. The lower sealing seat 703 has a groove in which the cavity elastomer 704 is disposed. The friction plate 701 is located at the top of the cavity elastomer 704. The positioning screw 702 passes laterally through the friction plate 701, and the screw end of the positioning screw 702 is close to the side wall of the lower sealing seat 703. The bottom of the cavity elastomer 704 is provided with an air inlet 705 that passes through the lower sealing seat 703 and the connecting flange 3. The friction plate 701 can be composed of two sets of semicircles.

[0030] The lower sealing seat 703 has a limiting groove 7031 on its side wall. The nut portion of the positioning screw 702 is located in the limiting groove 7031, and the width of the limiting groove 7031 is the same as the diameter of the nut of the positioning screw 702. This ensures that the positioning screw 702 is not restricted in the vertical direction, while restricting the lateral movement of the positioning screw 702, that is, restricting the rotation of the friction plate 701.

[0031] The top of the connecting seat 2 has a first water inlet hole 201, and the bottom of the feeding rotor hub 6 has a second water inlet hole 601. The first water inlet hole 201 and the second water inlet hole 601 are located inside the lower sealing assembly 7 and the upper sealing member 8. A through hole 602 is provided on the partition plate inside the feeding rotor hub 6. The dilution water outside the tower enters the sealing chamber formed by the lower sealing assembly 7 and the upper sealing member 8 through the first water inlet hole 201, and then enters the interior of the feeding rotor hub 6 through the second water inlet hole 601. It is distributed in the inner cavity of the feeding rotor hub 6 through the through hole 602, which facilitates the use of nozzles or other equipment connected to the feeding rotor hub 6 to spray it out and mix it with the material inside the tower.

[0032] Specific working principle:

[0033] Firstly, during the process of external dilution water entering the tower body, the dilution water outside the tower body enters the sealing chamber composed of the lower sealing assembly 7 and the upper sealing element 8 through the first water inlet 201, and then enters the interior of the feeding rotor hub 6 through the second water inlet 601. It then distributes within the inner cavity of the feeding rotor hub 6 through the through hole 602, facilitating the spraying of the mixture with the material inside the tower body using nozzles or other equipment connected to the feeding rotor hub 6. The metal ring 9 and the upper sealing element 8 form a sealing structure, and the connecting seat flange 3 and the tower body flange 4 form a sealing structure, preventing the mixed liquid inside the tower body from flowing back and leaking from these points.

[0034] When the lower sealing assembly 7 and the upper sealing element 8 form a sealing chamber, after the cavity elastic body 704 is inflated through the air inlet 705, the cavity elastic body 704 will support the friction plate 701. The upper surface of the friction plate 11 mates with the lower end face of the upper sealing element 8. The positioning screw 702 positions the lower sealing seat 703 and the friction plate 11 to prevent rotation, thereby achieving end face sealing when the feed rotor hub 6 rotates.

[0035] Since the cavity elastomer 704 is a flexible material, when the friction plate 701 wears, the gas can replenish the amount of wear at any time, thereby avoiding the mixing of the mixed liquid and dilution water in the tower. When the friction plate needs to be replaced, the machine is stopped and the gas supply is stopped. The friction plate 701 is then removed and replaced with a new one.

[0036] This avoids the risk of leakage caused by untimely human observation intervals, and also avoids the waste of time adjusting the pressure seal.

[0037] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A sealing structure between a feed rotor and the bottom of a reaction tower, comprising a tower head (1), a connecting seat (2) at the bottom of the tower head (1), a connecting seat flange (3) at the top of the connecting seat (2), a tower flange (4) between the tower head (1) and the connecting seat flange (3), a rotating shaft (5) in the middle of the connecting seat (2), and a feed rotor hub (6) at the top of the rotating shaft (5), characterized in that: The top of the connecting seat flange (3) is provided with a lower sealing assembly (7), the top of the lower sealing assembly (7) is provided with an upper sealing element (8), the top of the upper sealing element (8) is provided with a metal ring (9), and the top of the metal ring (9) is connected to the bottom of the feeding rotor hub (6). A sealing groove is opened on the bottom surface of the metal ring (9) that contacts the upper sealing element (8), and an upper sealing ring (10) is provided in the sealing groove. A sealing groove is opened on the upper surface of the connecting seat flange (3) that contacts the tower flange (4), and a lower sealing ring (11) is provided in the sealing groove. The lower sealing assembly (7) includes a friction plate (701), a positioning screw (702), a lower sealing seat (703), and a cavity elastomer (704). The lower sealing seat (703) is located at the top of the connecting seat flange (3). The lower sealing seat (703) has a groove and the cavity elastomer (704) is disposed in the groove. The friction plate (701) is located at the top of the cavity elastomer (704). The positioning screw (702) passes through the friction plate (701) laterally, and the screw end of the positioning screw (702) is close to the side wall of the lower sealing seat (703). The bottom of the cavity elastomer (704) is provided with an air inlet (705) that passes through the lower sealing seat (703) and the connecting seat flange (3).

2. The sealing structure between the feed rotor and the bottom of the reaction tower according to claim 1, characterized in that: The top of the connecting seat (2) is provided with a first water inlet hole (201), and the bottom of the feed rotor hub (6) is provided with a second water inlet hole (601). The first water inlet hole (201) and the second water inlet hole (601) are located inside the lower sealing assembly (7) and the upper sealing member (8). The partition inside the feed rotor hub (6) is provided with a through hole (602).

3. The sealing structure between the feed rotor and the bottom of the reaction tower according to claim 1, characterized in that: The upper seal (8) and the metal ring (9) are connected by first bolts (12) evenly arranged in the circumferential direction.

4. The sealing structure between the feed rotor and the bottom of the reaction tower according to claim 1, characterized in that: The lower sealing seat (703) and the connecting seat flange (3) are connected by second bolts (13) evenly arranged in the circumferential direction.

5. The sealing structure between the feed rotor and the bottom of the reaction tower according to claim 1, characterized in that: The connecting seat flange (3) and the tower body flange (4) are connected by a third bolt (14) evenly arranged in the circumferential direction.

6. The sealing structure between the feed rotor and the bottom of the reaction tower according to claim 1, characterized in that: The lower sealing seat (703) has a limiting groove (7031) on its side wall. The nut part of the positioning screw (702) is located in the limiting groove (7031), and the width of the limiting groove (7031) is the same as the diameter of the nut of the positioning screw (702).

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