Mechanical seal for kettle

Abstract

The mechanical seal for the kettle comprises a gland and a shaft sleeve, a sealing cover surrounding the shaft sleeve is fixedly connected to the outer side end face of the gland, a sealing cavity is formed among the inner wall of the sealing cover, the outer side end face of the gland and the outer wall of the shaft sleeve, and a first installation ring located in the sealing cavity is fixedly arranged on the shaft sleeve in a sleeved mode. A first movable ring is arranged on the first installation ring, a first static ring opposite to the first movable ring is arranged on the sealing cover, a first spring abutting against the first movable ring is arranged in the first installation ring, the first movable ring abuts against the first static ring under the action of the first spring, a second static ring is arranged on the gland, and a second installation ring is fixedly connected to the shaft sleeve. A second movable ring opposite to the second static ring is arranged in the second mounting ring, a second spring abutting against the second static ring is arranged in the gland, and the second static ring abuts against the second movable ring under the action of the second spring. According to the mechanical seal for the kettle, a better sealing effect can be achieved, the high sealing requirement is met, and better applicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a mechanical seal for reactors. Background Technology

[0002] Mechanical seals for reactors are sealing devices installed on reactors to seal the space between a rotating stirring shaft inserted into the reactor and the reactor itself. For example, a utility model patent, "A Mechanical Seal for Reactors" (Publication No.: CN209977255U), discloses a mechanical seal for reactors that achieves sealing through opposing moving and stationary rings. In the above structure, the sealing surface formed by the moving and stationary rings is located solely outside the reactor, resulting in an insufficient sealing effect and making it unsuitable for reactors with high sealing requirements.

[0003] To address the aforementioned problems, this utility model provides improvements. Utility Model Content

[0004] This invention proposes a mechanical seal for reactors, which solves the aforementioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A mechanical seal for a reactor includes a pressure cap and a bushing. The bushing passes through the pressure cap. A sealing cap surrounding the bushing is fixedly connected to the outer end face of the pressure cap. The inner wall of the sealing cap, the outer end face of the pressure cap, and the outer wall of the bushing form a sealing chamber. A first mounting ring located within the sealing chamber is fixedly sleeved on the bushing. A first moving ring is provided on the outer end face of the first mounting ring. A first stationary ring opposite to the first moving ring is provided on the inner wall of the sealing cap. A first spring is provided inside the first mounting ring, abutting against the first moving ring. The first moving ring abuts against the first stationary ring under the action of the first spring. A second stationary ring is provided on the inner end face of the pressure cap. A second mounting ring is fixedly connected to the inner end face of the bushing. A second moving ring opposite to the second stationary ring is provided on the outer end face of the second mounting ring. A second spring is provided inside the pressure cap, abutting against the second stationary ring. The second stationary ring abuts against the second moving ring under the action of the second spring.

[0007] Preferably, a first mounting groove matching the first moving ring is formed on the outer end face of the first mounting ring, a limiting protrusion is formed on the inner wall of the first mounting groove, a limiting groove matching the limiting protrusion is formed on the outer wall of the first moving ring, and the first moving ring is placed in the first mounting groove so that the limiting protrusion is kept in the limiting groove.

[0008] Preferably, a second mounting groove matching the second moving ring is formed on the outer end face of the second mounting ring, a first limiting pin is inserted in the second mounting groove, a limiting hole matching the first limiting pin is formed on the second moving ring, and the second moving ring is placed in the second mounting groove so that the first limiting pin is inserted into the limiting hole.

[0009] Preferably, the inner wall of the sealing cover is provided with a third mounting groove that matches the first stationary ring, the first stationary ring is placed in the third mounting groove, and the sealing cover is provided with a second limiting pin that is inserted into the first stationary ring.

[0010] Preferably, the first moving ring, the second moving ring, and the second stationary ring are made of silicon carbide, and the first stationary ring is made of rubber.

[0011] Preferably, a first abutment ring is provided in the first mounting groove on the inner end face of the first moving ring, and the first spring abuts against the first abutment ring. A second abutment ring is provided in the pressure cover on the outer end face of the second stationary ring, and the second spring abuts against the second abutment ring.

[0012] Preferably, the pressure cap has an injection channel that communicates with the sealing chamber and the junction of the second moving ring and the second stationary ring, and the upper and lower ends of the sealing cap are respectively provided with an exhaust port and a drain port that communicate with the sealing chamber.

[0013] In summary, the beneficial effects of this utility model are as follows: the first moving ring and the first stationary ring form a sealing surface located outside the reactor, and the second moving ring and the second stationary ring form a sealing surface located inside the reactor, achieving double sealing inside and outside, thereby improving the sealing effect of the mechanical seal for the reactor, making it more suitable for reactors with high sealing requirements and having better applicability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0018] In the diagram: 1. Gland; 2. Bushing; 3. Sealing cap; 31. Third mounting groove; 4. Sealing chamber; 5. First mounting ring; 51. First mounting groove; 52. Limiting protrusion; 6. First moving ring; 61. Limiting groove; 7. First stationary ring; 8. First spring; 9. Second stationary ring; 10. Second mounting ring; 101. Second mounting groove; 11. Second moving ring; 111. Limiting hole; 12. Second spring; 13. First limiting pin; 14. Second limiting pin; 15. First contact ring; 16. Second contact ring; 17. Injection channel; 18. Exhaust port; 19. Drain port. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] As shown in the figure, a mechanical seal for a vessel includes a pressure cap 1 and a bushing 2. The bushing 2 passes through the pressure cap 1. A sealing cover 3 is fixedly connected to the outer end face of the pressure cap 1, surrounding the bushing 2. The inner wall of the sealing cover 3, the outer end face of the pressure cap 1, and the outer wall of the bushing 2 form a sealing chamber 4. A first mounting ring 5 is fixedly sleeved on the bushing 2, located within the sealing chamber 4. A first moving ring 6 is provided on the outer end face of the first mounting ring 5. A first stationary ring 7, opposite to the first moving ring 6, is provided on the inner wall of the sealing cover 3. A first spring 8 is provided inside the mounting ring 5, which abuts against the first moving ring 6. The first moving ring 6 abuts against the first stationary ring 7 under the action of the first spring 8. A second stationary ring 9 is provided on the inner end face of the pressure cover 1. A second mounting ring 10 is fixedly connected to the inner end face of the bushing 2. A second moving ring 11 opposite to the second stationary ring 9 is provided on the outer end face of the second mounting ring 10. A second spring 12 is provided inside the pressure cover 1, which abuts against the second stationary ring 9. The second stationary ring 9 abuts against the second moving ring 11 under the action of the second spring 12.

[0021] Specifically, the structure of the first moving ring 6 disposed on the first mounting ring 5 is as follows: a first mounting groove 51 matching the first moving ring 6 is formed on the outer end face of the first mounting ring 5; a limiting protrusion 52 is formed on the inner wall of the first mounting groove 51; a limiting groove 61 matching the limiting protrusion 52 is formed on the outer wall of the first moving ring 6; the first moving ring 6 is placed in the first mounting groove 51 so that the limiting protrusion 52 is held in the limiting groove 61; after the first moving ring 6 is placed in the first mounting groove 51, the relative rotation of the first moving ring 6 and the first mounting ring 5 is limited by the cooperation of the limiting protrusion 52 and the limiting groove 61, so that the first moving ring 6 can rotate with the first mounting ring 5.

[0022] Specifically, the structure of the second moving ring 11 disposed on the second mounting ring 10 is as follows: a second mounting groove 101 matching the second moving ring 11 is formed on the outer end face of the second mounting ring 10; a first limiting pin 13 is inserted into the second mounting groove 101; a limiting hole 111 matching the first limiting pin 13 is formed on the second moving ring 11; the second moving ring 11 is placed in the second mounting groove 101 so that the first limiting pin 13 is inserted into the limiting hole 111; after the second mounting ring 10 is placed in the second mounting groove 101, the rotation of the second moving ring 11 relative to the second mounting ring 10 is limited by the cooperation of the limiting pin and the limiting hole 111, so that the second moving ring 11 can rotate with the second mounting ring 10.

[0023] Specifically, the structure of the first stationary ring 7 on the inner wall of the sealing cover 3 is as follows: a third mounting groove 31 matching the first stationary ring 7 is provided on the inner wall of the sealing cover 3, the first stationary ring 7 is placed in the third mounting groove 31, and a second limiting pin 14 inserted into the first stationary ring 7 is provided on the sealing cover 3. After the first stationary ring 7 is placed in the third mounting groove 31, the rotation of the first stationary ring 7 relative to the sealing cover 3 is limited by the action of the second limiting pin 14, so that the first stationary ring 7 is stably held on the inner wall of the sealing cover 3 to cooperate with the first moving ring 6.

[0024] Specifically, the first moving ring 6, the second moving ring 11, and the second stationary ring 9 are made of silicon carbide, and the first stationary ring 7 is made of rubber.

[0025] In the above structure, when installing and using this mechanical seal for reactors, the pressure cap 1 is fixedly installed on the outer wall of the reactor, so that the second moving ring 11 and the second stationary ring 9 are located inside the reactor, and the first moving ring 6 and the first stationary ring 7 are located outside the reactor. The stirring shaft passes through the bushing 2 and is fixedly connected to the bushing 2. When the stirring shaft rotates, it drives the bushing 2 to rotate, and the bushing 2 drives the first mounting ring 5 and the second mounting ring 10 to rotate. The first mounting ring 5 and the second mounting ring 10 drive the first moving ring 6 and the second moving ring 11 to rotate, respectively. During the rotation of the first moving ring 6 and the second moving ring 11, the first moving ring 6 and the first stationary ring 7, which are pressed against the first stationary ring 7 by the first spring 8, form a sealing surface located outside the reactor. The second stationary ring 9 and the second moving ring 11, which are pressed against the second moving ring 11 by the second spring 12, form a sealing surface located inside the reactor. By forming a sealing surface inside and outside the reactor, a double seal is achieved, which strengthens the sealing effect between the stirring shaft and the reactor, thus making it more suitable for reactors with high sealing requirements and giving this mechanical seal for reactors better applicability.

[0026] Furthermore, based on the above structure, a first abutting ring 15 is provided in the first mounting groove 51 on the inner end face of the first moving ring 6, and the first spring 8 abuts against the first abutting ring 15. A second abutting ring 16 is provided in the pressure cover 1 on the outer end face of the second stationary ring 9, and the second spring 12 abuts against the second abutting ring 16. Through the action of the first abutting ring 15 and the second abutting ring 16, the first spring 8 and the second spring 12 act more stably on the first moving ring 6 and the second stationary ring 9, so that the first moving ring 6 and the first stationary ring 7 and the second moving ring 11 and the second stationary ring 9 are more stably abutted against each other, thereby achieving a better sealing effect.

[0027] Furthermore, based on the above structure, the pressure cap 1 has a liquid injection channel 17 that communicates with the sealing chamber 4 and the junction of the second moving ring 11 and the second stationary ring 9. The upper and lower ends of the sealing cap 3 are respectively provided with an exhaust port 18 and a drain port 19 that communicate with the sealing chamber 4. The liquid injection channel 17, the exhaust port 18, and the drain port 19 are sealed by plugs. Sealing fluid is injected into the space between the second moving ring 11 and the second stationary ring 9 and between the first moving ring 6 and the first stationary ring 7 located in the sealing chamber 4 through the liquid injection channel 17. The sealing fluid plays a role in lubricating the sealing end face and cooling heat dissipation between the first moving ring 6 and the first stationary ring 7 and between the second moving ring 11 and the second stationary ring 9, reducing wear between the moving ring and the stationary ring and carrying away heat through flow, thereby extending the service life of the mechanical seal. The exhaust port is used to discharge the air generated in the sealing chamber 4 to prevent excessive pressure in the sealing chamber 4 from causing leakage. The drain port 19 is used to discharge impurities in the sealing chamber 4 to keep the sealing surface clean and prevent impurities from accumulating and causing leakage.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical seal for a vessel, comprising a pressure cap (1) and a bushing (2), wherein the bushing (2) passes through the pressure cap (1), characterized in that: A sealing cap (3) surrounding the bushing (2) is fixedly connected to the outer end face of the pressure cap (1). The inner wall of the sealing cap (3) forms a sealing chamber (4) with the outer end face of the pressure cap (1) and the outer wall of the bushing (2). A first mounting ring (5) located in the sealing chamber (4) is fixedly sleeved on the bushing (2). A first moving ring (6) is provided on the outer end face of the first mounting ring (5). A first stationary ring (7) opposite to the first moving ring (6) is provided on the inner wall of the sealing cap (3). A first abutment against the first moving ring (6) is provided inside the first mounting ring (5). Spring (8), the first moving ring (6) abuts against the first stationary ring (7) under the action of the first spring (8), a second stationary ring (9) is provided on the inner end face of the pressure cover (1), a second mounting ring (10) is fixedly connected to the inner end face of the bushing (2), a second moving ring (11) opposite to the second stationary ring (9) is provided on the outer end face of the second mounting ring (10), a second spring (12) is provided inside the pressure cover (1) to abut against the second stationary ring (9), and the second stationary ring (9) abuts against the second moving ring (11) under the action of the second spring (12).

2. The mechanical seal for a reactor according to claim 1, characterized in that: A first mounting groove (51) matching the first moving ring (6) is formed on the outer end face of the first mounting ring (5). A limiting protrusion (52) is formed on the inner wall of the first mounting groove (51). A limiting groove (61) matching the limiting protrusion (52) is formed on the outer wall of the first moving ring (6). The first moving ring (6) is placed in the first mounting groove (51) so that the limiting protrusion (52) is kept in the limiting groove (61).

3. The mechanical seal for a reactor according to claim 2, characterized in that: A second mounting groove (101) matching the second moving ring (11) is formed on the outer end face of the second mounting ring (10). A first limiting pin (13) is inserted into the second mounting groove (101). A limiting hole (111) matching the first limiting pin (13) is formed on the second moving ring (11). The second moving ring (11) is placed in the second mounting groove (101) so that the first limiting pin (13) is inserted into the limiting hole (111).

4. The mechanical seal for reactors according to claim 3, characterized in that: The inner wall of the sealing cover (3) is provided with a third mounting groove (31) that matches the first stationary ring (7). The first stationary ring (7) is placed in the third mounting groove (31). The sealing cover (3) is provided with a second limiting pin (14) that is inserted into the first stationary ring (7).

5. The mechanical seal for a reactor according to claim 4, characterized in that: The first moving ring (6), the second moving ring (11), and the second stationary ring (9) are made of silicon carbide, and the first stationary ring (7) is made of rubber.

6. The mechanical seal for a reactor according to claim 5, characterized in that: The first mounting groove (51) is provided with a first abutting ring (15) located on the inner end face of the first moving ring (6), and the first spring (8) abuts against the first abutting ring (15). The pressure cap (1) is provided with a second abutting ring (16) located on the outer end face of the second stationary ring (9), and the second spring (12) abuts against the second abutting ring (16).

7. The mechanical seal for a reactor according to claim 6, characterized in that: The pressure cap (1) has an injection channel (17) that connects to the sealing chamber (4) and the junction of the second moving ring (11) and the second stationary ring (9). The upper and lower ends of the sealing cap (3) are respectively provided with an exhaust port (18) and a drain port (19) that connect to the sealing chamber (4).

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