Mechanical sealing structure for autoclave

Abstract

The utility model discloses a mechanical sealing structure for an autoclave, which belongs to the technical field of mechanical sealing and comprises a moving ring, an annular cooling groove is arranged in a sealing box, two cooling water nozzles are arranged on two sides of the periphery of the sealing box and are respectively a water inlet nozzle and a water outlet nozzle, and the water inlet nozzle and the water outlet nozzle are communicated with each other. A shaft sleeve is arranged in the sealing box, a cooling water seal is arranged in the cooling groove, and an inner ring of the cooling water seal is arranged on the periphery of the shaft sleeve in a sleeving mode and connected with the periphery of the shaft sleeve in a sealing mode. The two cooling water nozzles are utilized to enable the cooling tank to be communicated with the outside, so that in the long-time operation process of the transmission shaft, generated heat is absorbed by cooling liquid in the cooling tank, the purpose of cooling is achieved, and the situation that due to friction generated by long-time operation of the transmission shaft, the temperature in the sealing box rises, and the service life of the transmission shaft is prolonged is avoided. Therefore, parts are affected by high temperature to be damaged, and the service life is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, and in particular relates to a mechanical seal structure for an autoclave. Background Art

[0002] A mechanical seal is a shaft sealing device that achieves leakage prevention by relying on a pair or several pairs of end faces that slide relative to each other perpendicular to the shaft to maintain contact under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, and is equipped with an auxiliary seal. The commonly used mechanical seal structure consists of a stationary ring (static ring), a rotating ring (dynamic ring), an elastic element spring seat, a set screw, a rotating ring auxiliary seal ring and a stationary ring auxiliary seal ring. The anti-rotation pin is fixed on the gland to prevent the stationary ring from rotating.

[0003] According to patent No. CN202321399772.8, a mechanical seal structure for an autoclave includes a stationary ring and a dynamic ring, a plurality of rolling grooves are provided at the right end of the stationary ring, balls are rollingly connected inside the plurality of rolling grooves, a reciprocating thread groove is provided at the right end of the outer wall of the stationary ring; springs fixedly connected to convex plates are sleeved on the outer walls of the plurality of limit blocks, the annular elastic sheet abuts against the balls, and a reciprocating thread block matched with the reciprocating thread groove is provided at the left end of the inner wall of the dynamic ring.

[0004] The above technical solution still has certain technical defects in actual use. Since the above solution does not have the function of cooling and heat dissipation, heat is generated due to friction during the continuous rotation of the transmission shaft. The heat cannot be effectively diffused and accumulates for a long time, which will cause the heat to gradually increase, thereby causing the internal sealing components to gradually be damaged due to high temperature, reducing the service life of each component. For this reason, we propose a mechanical sealing structure for an autoclave. Utility Model Content

[0005] The purpose of the utility model is to provide a mechanical sealing structure for an autoclave to solve the existing problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical seal structure for an autoclave, comprising a dynamic ring, a static ring, a sealing box and a cooling groove, wherein an annular cooling groove is provided inside the sealing box, two cooling water nozzles are provided on both sides of the outer periphery of the sealing box, and the two cooling water nozzles are respectively a water inlet nozzle and a water outlet nozzle, a shaft sleeve is provided inside the sealing box, a cooling water seal is provided inside the cooling groove, and an inner ring of the cooling water seal is sleeved on the outer periphery of the shaft sleeve and is sealed and connected to the outer periphery thereof.

[0007] Preferably, the two ends of the sealing box are respectively provided with internal threads and external threads, a sealing box gasket is provided at the end of the sealing box provided with the internal threads, the outer periphery of one end of the sealing box gasket is fixedly connected with the internal threads of the sealing box through the external threads, a sand-proof K-ring is provided between the sealing box gasket and the sealing box, and the sand-proof K-ring is arranged inside the sealing box.

[0008] Preferably, a static ring is sleeved on the outer periphery of one end of the sleeve close to the sealing box gasket, the sand-proof K-ring and the sealing box gasket are both sleeved on the outer periphery of the static ring, and a dynamic ring in close contact with the static ring is provided on the side of the sealing box gasket away from the sealing box.

[0009] Preferably, a static ring seat is provided inside one end of the sealing box provided with an external thread, and one side of the static ring seat is connected to the static ring.

[0010] Preferably, a spring is provided on the side of the stationary ring seat away from the stationary ring, a spring seat is provided on the end of the spring away from the stationary ring seat, and the stationary ring seat, spring and spring seat are all sleeved on the outer circumference of the shaft sleeve.

[0011] Preferably, a sealing box cover is provided on the outside of one end of the sealing box provided with an external thread, and the sealing box cover is fixedly connected to the external thread of the sealing box via an internal thread provided on the inside of one end.

[0012] Preferably, a spring seat sealing ring is provided at the middle of the outer periphery of the spring seat, and the spring seat sealing ring is fixedly sleeved on the outer periphery of the spring seat and is in close contact with the inner wall of the sealing box.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. A cooling groove is opened inside the sealing box, and two cooling water nozzles are used to connect the cooling groove with the outside world. In combination with a cooling water seal inside the cooling groove, leakage of the coolant is avoided. During the long-term operation of the transmission shaft, the heat generated is absorbed by the coolant in the cooling groove, and the coolant after absorbing the heat is discharged, so that the coolant inside the cooling groove forms a stable circulation, thereby achieving the purpose of cooling and reducing the temperature, and avoiding the friction caused by the long-term operation of the transmission shaft, which causes the temperature in the sealing box to rise, thereby causing the parts to be damaged by the high temperature and reducing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the cooling water seal structure of the utility model.

[0018] In the figure: 1. dynamic ring; 2. sealing box gasket; 3. static ring; 4. sand-proof K-ring; 5. shaft sleeve; 6. sealing box; 7. cooling water nozzle; 8. cooling groove; 9. static ring seat; 10. spring; 11. spring seat; 12. spring seat sealing ring; 13. cooling water seal; 14. sealing box cover. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution of a mechanical seal structure for an autoclave, comprising a dynamic ring 1, a static ring 3, a sealing box 6 and a cooling groove 8. An annular cooling groove 8 is provided inside the sealing box 6. Two cooling water nozzles 7 are provided on both sides of the outer periphery of the sealing box 6. The two cooling water nozzles 7 are respectively a water inlet nozzle and a water outlet nozzle. A shaft sleeve 5 is provided inside the sealing box 6. A cooling water seal 13 is provided inside the cooling groove 8. The inner ring of the cooling water seal 13 is sleeved on the outer periphery of the shaft sleeve 5 and is sealed and connected to the outer periphery thereof.

[0021] Specifically, the two ends of the sealing box 6 are respectively provided with internal threads and external threads, and the end of the sealing box 6 provided with the internal threads is provided with a sealing box gasket 2, and the outer periphery of one end of the sealing box gasket 2 is fixedly connected with the internal threads of the sealing box 6 through external threads, and a sand-proof K-ring 4 is provided between the sealing box gasket 2 and the sealing box 6, and the sand-proof K-ring 4 is arranged inside the sealing box 6.

[0022] Specifically, a static ring 3 is sleeved on the outer periphery of one end of the sleeve 5 close to the sealing box gasket 2, the sand-proof K-ring 4 and the sealing box gasket 2 are both sleeved on the outer periphery of the static ring 3, and a dynamic ring 1 in close contact with the static ring 3 is provided on the side of the sealing box gasket 2 away from the sealing box 6.

[0023] Specifically, a stationary ring seat 9 is provided inside one end of the sealing box 6 having an external thread, and one side of the stationary ring seat 9 is connected to the stationary ring 3 .

[0024] Specifically, a spring 10 is provided on the side of the stationary ring seat 9 away from the stationary ring 3 , and a spring seat 11 is provided on the end of the spring 10 away from the stationary ring seat 9 . The stationary ring seat 9 , the spring 10 and the spring seat 11 are all sleeved on the outer circumference of the shaft sleeve 5 .

[0025] Specifically, a sealing box cover 14 is provided on the outside of one end of the sealing box 6 provided with an external thread, and the sealing box cover 14 is fixedly connected to the external thread of the sealing box 6 via an internal thread provided on one end.

[0026] Specifically, a spring seat sealing ring 12 is provided in the middle of the outer periphery of the spring seat 11 . The spring seat sealing ring 12 is fixedly sleeved on the outer periphery of the spring seat 11 and is in close contact with the inner wall of the sealing box 6 .

[0027] In the present embodiment, during use, by utilizing two cooling water nozzles 7, coolant is injected into the interior of the cooling tank 8 from one of the cooling water nozzles 7. During the rotation of the transmission shaft inside the sealing box 6, the heat generated is absorbed by the coolant in the cooling tank 8, causing the coolant to heat up. Then, during the continuous injection of coolant into the cooling tank 8, the heated coolant is discharged, and new coolant is continuously injected, so that the coolant in the cooling tank 8 forms a stable circulation, and the heat therein is taken away from the cooling tank 8, thereby achieving the purpose of cooling and lowering the temperature, so that the interior of the sealing box 6 can always be in a stable temperature state, avoiding the friction caused by the long-term operation of the transmission shaft, which causes the temperature inside the sealing box 6 to rise, thereby causing the parts to be damaged by the high temperature and reducing the service life.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal structure for an autoclave, comprising a dynamic ring (1), a static ring (3), a sealing box (6) and a cooling groove (8), characterized in that: An annular cooling groove (8) is provided inside the sealing box (6), two cooling water nozzles (7) are provided on both sides of the outer periphery of the sealing box (6), and the two cooling water nozzles (7) are respectively a water inlet nozzle and a water outlet nozzle. A shaft sleeve (5) is provided inside the sealing box (6), and a cooling water seal (13) is provided inside the cooling groove (8), and the inner ring of the cooling water seal (13) is sleeved on the outer periphery of the shaft sleeve (5) and is sealed and connected to the outer periphery thereof.

2. The mechanical seal structure for an autoclave according to claim 1, characterized in that: The two ends of the sealing box (6) are respectively provided with an internal thread and an external thread, and the end of the sealing box (6) provided with the internal thread is provided with a sealing box gasket (2), and the outer periphery of one end of the sealing box gasket (2) is fixedly connected to the internal thread of the sealing box (6) through the external thread, and a sand-proof K-type ring (4) is provided between the sealing box gasket (2) and the sealing box (6), and the sand-proof K-type ring (4) is arranged inside the sealing box (6).

3. The mechanical seal structure for an autoclave according to claim 2, characterized in that: A static ring (3) is sleeved on the outer periphery of one end of the shaft sleeve (5) close to the sealing box gasket (2); the sand-proof K-ring (4) and the sealing box gasket (2) are sleeved on the outer periphery of the static ring (3); and a dynamic ring (1) in close contact with the static ring (3) is provided on the side of the sealing box gasket (2) away from the sealing box (6).

4. The mechanical seal structure for an autoclave according to claim 1, characterized in that: A stationary ring seat (9) is arranged inside one end of the sealing box (6) provided with an external thread, and one side of the stationary ring seat (9) is connected to the stationary ring (3).

5. The mechanical seal structure for an autoclave according to claim 4, characterized in that: A spring (10) is arranged on the side of the stationary ring seat (9) away from the stationary ring (3), and a spring seat (11) is arranged on the end of the spring (10) away from the stationary ring seat (9). The stationary ring seat (9), the spring (10) and the spring seat (11) are all sleeved on the outer circumference of the shaft sleeve (5).

6. The mechanical seal structure for an autoclave according to claim 1, characterized in that: A sealing box cover (14) is provided on the outside of one end of the sealing box (6) provided with an external thread, and the sealing box cover (14) is fixedly connected to the external thread of the sealing box (6) via an internal thread provided on the inside of one end.

7. The mechanical seal structure for an autoclave according to claim 5, characterized in that: A spring seat sealing ring (12) is provided at the middle of the outer periphery of the spring seat (11); the spring seat sealing ring (12) is fixedly sleeved on the outer periphery of the spring seat (11) and is in close contact with the inner wall of the sealing box (6).

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