Variable-shaft-diameter mechanical sealing device for axial kettle

Abstract

The invention relates to the technical field of sealing equipment, and discloses a variable-shaft-diameter mechanical sealing device for an axial kettle, which comprises a guide ring, a plurality of fixing bolts are in threaded connection with the inner side of the guide ring, an annular frame is integrally formed at the bottom end of the guide ring, an annular plate is integrally formed at the periphery of the annular frame, and a plurality of first springs are fixedly welded at the bottom end of the annular frame; the outer wall of the connecting lantern ring is fixedly sleeved with a sealing belt. According to the variable-shaft-diameter mechanical sealing device for the axial kettle, due to the fact that a driving shaft works for a long time, abrasion is possibly aggravated, a double-layer sealing ring cannot conduct sealing, operation of the axial kettle is affected, a second bolt drives a second base plate to extrude a second spring, a flange base moves upwards, and a rubber ring is extruded; the inner side of the rubber ring can be in contact with the outer wall of the driving shaft, so that a double-layer sealing ring can be temporarily replaced for sealing, time is bought for operation of the axial kettle, and the problem that the axial kettle cannot normally operate due to the fact that the sealing effect is possibly reduced when a sealing ring is seriously abraded is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sealing equipment, in particular to an axial mechanical sealing device for a variable shaft diameter kettle. Background Art

[0002] A shaft is a cylindrical object that passes through a bearing, wheel, or gear, though a few are square. A shaft is a mechanical component that supports rotating parts and rotates with them to transmit motion, torque, or bending moment. It is generally a metal rod, with sections having different diameters. A variable-diameter axial quencher is one such example, and a mechanical seal is required for sealing. The existing patent can refer to patent number: 202120291194.0, which specifically discloses a mechanical seal device for an axial kettle with a variable shaft diameter, including a kettle mouth flange, a fixing sleeve, a sealing gasket, a first O-ring, a medium end static ring, a sealing box, a medium end dynamic ring, a card wire, a second O-ring, a push ring, a spring, a spring seat, a transmission pin, a third O-ring, an atmospheric end dynamic ring, a shaft sleeve, an atmospheric end static ring, a fourth O-ring, a fifth O-ring, an atmospheric end static ring seat, a stud bolt and a rotating shaft. The kettle mouth flange is sleeved and fixed on the outer wall of one side of the rotating shaft, and the fixing sleeve is sleeved and fixed on the top outer wall of the kettle mouth flange. The sealing gasket is sleeved and fixed on the outer wall of the kettle mouth flange above the fixing sleeve. The medium end static ring is installed on the inner wall of one side of the sealing gasket, and the sealing box is installed on the top outer wall of the sealing gasket. The utility model can use anti-corrosion materials, so that the sealing effect can be ensured in a corrosive environment, so that the axial kettle can operate normally. However, the existing axial kettle sealing device with variable shaft diameter generally does not have a sealing adjustment device. In actual use, if the sealing ring is severely worn, the sealing effect may be reduced, making the axial kettle unable to operate normally. The failure of the axial kettle to operate may cause damage to internal materials, resulting in waste of resources. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a mechanical sealing device for an axial kettle with a variable shaft diameter to solve the problem mentioned in the above background technology that the existing axial kettle sealing device with a variable shaft diameter generally does not have a sealing adjustment device. In actual use, if the sealing ring is severely worn, it may lead to a decrease in the sealing effect, making the axial kettle unable to operate normally.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mechanical sealing device for an axial kettle with a variable shaft diameter, comprising a guide ring, the inner side of the guide ring is threadedly connected to a plurality of fixing bolts, the bottom end of the guide ring is integrally formed with an annular frame, the outer periphery of the annular frame is integrally formed with an annular plate, the bottom end of the annular frame is fixedly welded with a plurality of first springs, a plurality of first springs are fixedly welded with a guide column on the side away from the annular frame, a dynamic ring is integrally formed on the side away from the guide ring, a sealing gasket is movably connected to the side of the east ring away from the guide ring, a plurality of bolts are provided through the interior of the annular plate, a plurality of the bolts are fixedly sleeved with a gasket on the outer walls, a connecting ring is movably connected to the side of the sealing gasket away from the dynamic ring, a sealing belt is fixedly sleeved on the outer wall of the connecting ring, and a plurality of balls are provided on the side of the sealing belt away from the axis; The outer wall of the connecting collar is rotatably connected to a stationary ring, the outer wall of the stationary ring is integrally formed with a reinforcement ring, and the inner side of the reinforcement ring is threadedly connected to a plurality of fixing bolts, an inner ring is provided on the inner side of the stationary ring, a double-layer sealing ring is provided on the inner side of the inner ring, a groove is provided on the inner side of the inner ring, and a rubber ring is movably connected to the inside of the groove, and a flange seat is movably inserted into the inner side of the groove; The outer fixed sleeve of the flange seat is provided with a mounting collar, the interior of the rubber ring is provided with a plurality of sliding holes, the top of the flange seat is provided with a plurality of positioning rods, the outer wall of the flange seat is provided with a plurality of bolt holes, the interior of the mounting collar is provided with a plurality of bolts 2, the interior of the embedded ring is provided with a plurality of limiting grooves, and the interiors of the plurality of limiting grooves are provided with a second spring, and the outer walls of the plurality of bolts 2 are fixedly sleeved with a second gasket.

[0005] Preferably, a plurality of guide posts are provided through the inner side of the dynamic ring, and a side of the guide post away from the first spring is movably connected to an outer wall of the sealing gasket.

[0006] Preferably, the outer walls of the plurality of gaskets 1 are movably connected to the top end of the connecting collar, and the plurality of bolts 1 are connected to the internal threads of the connecting collar.

[0007] Preferably, a plurality of engaging grooves are provided on a side of the connecting ring close to the sealing gasket, and a positioning block matching the plurality of engaging grooves is provided on a side of the sealing gasket close to the connecting sleeve.

[0008] Preferably, the outer walls of the plurality of balls are slidably connected to the inner side of the static ring, the sealing belt is made of rubber material, and the edge of the sealing belt is arranged in an arc shape, and the outer wall of the sealing belt is tightly fitted to the inner side of the static ring.

[0009] Preferably, the outer wall of the rubber ring is fitted together with the top of the flange seat, the outer walls of the plurality of bolts 2 are connected together with the internal threads of the embedded ring, a displacement groove is opened inside the embedded ring, and a plurality of bolts 2 are arranged through the interior of the displacement groove.

[0010] Preferably, the plurality of positioning rods are arranged through the inner side of the sliding hole on the rubber ring, and a positioning groove is opened on the inner side of the embedded ring. The plurality of positioning grooves are respectively arranged corresponding to the plurality of positioning rods, and the positioning rods are arranged through the interior of the positioning grooves.

[0011] Preferably, the double-layer sealing ring is arranged above the sealing ring, the mounting collar is arranged on the inner side of the static ring, and a rubber pad is arranged between the inner side of the static ring and the outer side of the embedded ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The mechanical sealing device for the axial reactor with variable shaft diameter may cause increased wear due to the long-term operation of the drive shaft, resulting in the failure of the double-layer sealing ring to seal, which will cause gas and liquid to leak out and affect the operation of the axial reactor. Bolt 2 drives the second pad to squeeze the second spring, so that the flange seat moves upward to squeeze the rubber ring, causing the rubber ring to deform. At this time, the inner side of the rubber ring can contact the outer wall of the drive shaft to achieve a sealing effect. It can temporarily replace the double-layer sealing ring for sealing, buying time for the operation of the axial reactor and solving the problem that if the sealing ring is severely worn, the sealing effect may be reduced, making the axial reactor unable to operate normally.

[0013] 2. The mechanical seal device for the axial kettle with variable shaft diameter is provided with a snap-fit groove on the side of the connecting ring close to the sealing gasket, which is used to leave a certain displacement space for the positioning rod. The sealing gasket matches the snap-fit groove to achieve the effect of fixing the sealing gasket, which can limit the sealing gasket from rotating with the drive shaft to reduce the loss caused by wear.

[0014] 3. The mechanical seal device for the axial kettle with variable shaft diameter can achieve a double-layer sealing effect by setting a double-layer sealing ring above the sealing ring. In the early stage of the device, the sealing ring does not contact the drive shaft. At this time, only the double-layer sealing ring can be sealed. The mounting ring is set on the inner side of the static ring to achieve the effect of shielding the mounting ring. A rubber pad is set between the inner side of the static ring and the outer side of the embedded ring to achieve a sealing effect and prevent gas and liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic three-dimensional diagram of the structure of the present invention; Figure 2 It is a schematic front cross-sectional view of the structure of the present invention; Figure 3This is a three-dimensional schematic diagram of the flange seat and its related structures of the present invention; Figure 4 It is a side cross-sectional schematic diagram of the flange seat and its related structures of the present invention; Figure 5 The structure of the present invention Figure 1 A in the middle is an enlarged schematic diagram; Figure 6 This is an exploded perspective diagram of the rubber ring and its related structures of the present invention; Figure 7 It is a schematic front view and cross-sectional view of the embedded ring and its related structures of the present invention; Figure 8 This is a schematic front view and cross-sectional view of the structure of the present invention.

[0016] In the figure: 1. Guide ring; 2. Fixing bolt; 3. Ring frame; 4. Ring plate; 5. First spring; 6. Guide column; 7. Bolt 1; 8. Gasket 1; 9. Sealing gasket; 10. Connecting ring; 11. Sealing tape; 12. Ball; 13. Stationary ring; 14. Reinforcement ring; 15. Fixing bolt; 16. Embedded ring; 17. Double-layer sealing ring; 18. Rubber ring; 19. Flange seat; 20. Mounting ring; 21. Sliding hole; 22. Positioning rod; 23. Bolt hole; 24. Bolt 2; 25. Second spring; 26. Gasket 2; 27. Moving ring. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example: Please refer to Figure 1-8. A mechanical sealing device for an axial kettle with a variable shaft diameter comprises a guide ring 1, the inner side of the guide ring 1 is threadedly connected with a plurality of fixing bolts 2, the bottom end of the guide ring 1 is integrally formed with an annular frame 3, the periphery of the annular frame 3 is integrally formed with an annular plate 4, the bottom end of the annular frame 3 is fixedly welded with a plurality of first springs 5, the side of the plurality of first springs 5 away from the annular frame 3 is fixedly welded with a guide column 6, the side of the annular frame 3 away from the guide ring 1 is integrally formed with a dynamic ring 27, the side of the east ring away from the guide ring 1 is movably connected with a sealing gasket 9, the interior of the annular plate 4 is penetrated by a plurality of bolts 7, the outer walls of the plurality of bolts 7 are fixedly sleeved with a gasket 8, the side of the sealing gasket 9 away from the dynamic ring 27 is movably connected with a connecting ring 10, the outer wall of the connecting ring 10 is fixedly sleeved with a sealing belt 11, and a plurality of balls 12 are provided on the side of the sealing belt 11 away from the axis; The outer wall of the connecting collar 10 is rotatably connected to a stationary ring 13. A reinforcement ring 14 is integrally formed on the outer wall of the stationary ring 13, and a plurality of fixing bolts 15 are threadedly connected to the inner side of the reinforcement ring 14. An inner ring 16 is provided on the inner side of the stationary ring 13, and a double-layer sealing ring 17 is provided on the inner side of the inner ring 16. A groove is formed on the inner side of the inner ring 16, and a rubber ring 18 is movably connected to the inside of the groove. A flange seat 19 is movably inserted into the inner side of the groove. The outer fixed sleeve of the flange seat 19 is provided with a mounting collar 20, the interior of the rubber ring 18 is provided with a plurality of sliding holes 21, the top of the flange seat 19 is provided with a plurality of positioning rods 22, the outer wall of the flange seat 19 is provided with a plurality of bolt holes 23, the interior of the mounting collar 20 is provided with a plurality of bolts 24, the interior of the embedded ring 16 is provided with a plurality of limiting grooves, and the interior of each of the plurality of limiting grooves is provided with a second spring 25, and the outer walls of the plurality of bolts 24 are fixedly provided with a second washer 26; Specifically, when the device is used, first put the flange seat 19 on the drive shaft, the embedded ring 16, the static ring 13 and the connecting collar 10 on the drive shaft, the fixing bolt 15 can fix the embedded ring 16 on the inner side of the static ring 13, then put the sealing gasket 9 on the drive shaft, and then the sealing gasket 9 is fitted on the connecting collar 10, and then the dynamic ring 27 is put on the drive shaft, and then the bolt 17 passes through the inside of the annular plate 4 and is connected with the internal thread of the connecting collar 10, and then the gasket 18 is fitted on the connecting collar 10, and a uniform pressure is applied to the annular plate 4, and then an extrusion force is applied to the sealing gasket 9 so that the sealing gasket 9 is tightly attached to the outside of the drive shaft, the first spring 5 has elastic force, pushes the guide column 6 downward, and the guide column 6 squeezes the rubber pad, and then completes the effect of fixing the sealing gasket 9, and then tightens the fixing bolt 2, and then the fixing bolt 2 contacts the drive shaft to achieve the effect of clamping and fixing the drive shaft, and the drive shaft will drive the guide ring 1 to indirectly drive the dynamic ring 27 to rotate, and the assembly is completed; When the device is in operation, the drive shaft will drive the guide ring 1 to rotate, indirectly driving the connecting ring 10 to rotate, so that the sealing belt 11 rotates along the inside of the static ring 13 to achieve sealing without affecting the rotation of the drive shaft. Because the drive shaft needs to rotate all the time, the contact surface between the drive shaft and the double-layer sealing ring 17 will wear to a certain extent. If the working time is long, the wear may be aggravated, resulting in the double-layer sealing ring 17 failing to seal, which will cause gas and liquid to leak out, affecting the operation of the axial reactor. At this time, the second bolt 24 is rotated, and the second bolt 24 will drive the second pad to squeeze the second spring 25, so that the second pad contacts the embedded ring 16, and then the flange seat 19 moves up. The flange seat 19 will cooperate with the embedded ring 16 to squeeze the rubber ring 18, causing the rubber ring 18 to deform. At this time, the inner side of the rubber ring 18 can contact the outer wall of the drive shaft, which can achieve a sealing effect. The double-layer sealing ring 17 can be temporarily replaced to seal, which buys time for the operation of the axial reactor. The axial reactor can be disassembled and replaced when it is not in use. This solves the problem that the existing axial reactor sealing device with variable shaft diameter generally does not have a sealing adjustment device. In actual use, if the sealing ring is severely worn, the sealing effect may be reduced, making the axial reactor unable to operate normally. In the embodiment: a plurality of guide posts 6 are provided through the inner side of the dynamic ring 27, and the side of the guide posts 6 away from the first spring 5 is movably connected to the outer wall of the sealing gasket 9; Specifically, the guide column 6 is used to squeeze the sealing gasket 9 and can be used in conjunction with the first spring 5 to apply a squeezing force to the sealing gasket 9 to achieve the effect of fixing the sealing gasket 9; In the embodiment, the outer walls of the plurality of gaskets 8 are movably connected to the top of the connecting collar 10, and the plurality of bolts 7 are connected to the internal threads of the connecting collar 10; Specifically, the backing ring 8 is movably connected to the connecting collar 10 to limit the further downward movement of the bolt 7, thereby applying a relatively uniform force to the annular plate 4 to achieve the effect of pressing the annular plate 4 downward. The annular plate 4 will drive the guide ring 1 and the annular frame 3 to move downward, thereby achieving the effect of squeezing the sealing gasket 9. In the embodiment: a plurality of engaging grooves are provided on a side of the connecting ring 10 close to the sealing gasket 9, and a positioning block matching the plurality of engaging grooves is provided on a side of the sealing gasket 9 close to the connecting sleeve; Specifically, a snap-fit groove is provided on one side of the connecting collar 10 close to the sealing gasket 9 to leave a certain displacement space for the positioning rod 22. The sealing gasket 9 matches the snap-fit groove to achieve the effect of fixing the sealing gasket 9, which can limit the sealing gasket 9 from rotating with the drive shaft, thereby reducing the loss caused by wear. In the embodiment, the outer walls of the plurality of balls 12 are slidably connected to the inner side of the stationary ring 13, the sealing belt 11 is made of rubber, and the edge of the sealing belt 11 is arranged in an arc shape, and the outer wall of the sealing belt 11 is tightly fitted to the inner side of the stationary ring 13; Specifically, multiple balls 12 are in contact with the stationary ring 13 to reduce friction. The sealing strip 11 is made of rubber and can achieve a sealing effect. The edge of the sealing strip 11 is arranged in an arc shape. The sealing strip 11 fits together with the inner side of the stationary ring 13 to achieve a sealing effect. In the embodiment, the outer wall of the rubber ring 18 is fitted with the top of the flange seat 19, the outer wall of the plurality of second bolts 24 is threadedly connected with the inner part of the inner ring 16, the inner part of the inner ring 16 is provided with a displacement groove, and the plurality of second bolts 24 are disposed through the displacement groove; Specifically, the rubber ring 18 and the flange seat 19 are fitted together to achieve the effect of squeezing the rubber ring 18, causing the rubber ring 18 to deform. Then, the side of the rubber ring 18 close to the axis can contact the drive shaft to achieve a sealing effect. The second bolt 24 is arranged inside the displacement groove, leaving a certain amount of movement space, and can be used in conjunction with the mounting ring 20 to achieve the effect of squeezing the rubber ring 18. In the embodiment: a plurality of positioning rods 22 are provided through the inner side of the sliding hole 21 on the rubber ring 18, and a positioning groove is provided on the inner side of the embedded ring 16. The plurality of positioning grooves are respectively provided corresponding to the plurality of positioning rods 22, and the positioning rods 22 are provided through the inner side of the positioning grooves; Specifically, the positioning rod 22 is provided inside the sliding hole 21 of the rubber ring 18, which can achieve the effect of positioning the rubber ring 18 and fix the rubber ring 18. The positioning groove is provided to leave displacement space for the positioning rod 22, so that the positioning rod 22 can move upward under the pressure of the flange seat 19, and then the top of the flange seat 19 can squeeze the sealing ring; In the embodiment: the double-layer sealing ring 17 is arranged above the sealing ring, the mounting collar 20 is arranged on the inner side of the stationary ring 13, and a rubber pad is arranged between the inner side of the stationary ring 13 and the outer side of the embedded ring 16; Specifically, the double-layer sealing ring 17 is arranged above the sealing ring to achieve a double-layer sealing effect. In the early stage of the device, the sealing ring does not contact the drive shaft. At this time, only the double-layer sealing ring 17 can be sealed. The mounting collar 20 is arranged on the inner side of the static ring 13 to achieve the effect of shielding the mounting collar 20. A rubber pad is provided between the inner side of the static ring 13 and the outer side of the embedded ring 16 to achieve a sealing effect and prevent gas and liquid leakage. Working principle: Long-term operation of the drive shaft may cause increased wear, resulting in the double-layer sealing ring 17 being unable to seal, causing gas and liquid to leak out, affecting the operation of the axial kettle. Bolt 24 drives the second pad 2 to squeeze the second spring 25, so that the flange seat 19 moves upward to squeeze the rubber ring 18, causing the rubber ring 18 to deform. At this time, the inner side of the rubber ring 18 can contact the outer wall of the drive shaft to achieve a sealing effect. Compared with related technologies, the mechanical sealing device for the axial kettle with variable shaft diameter provided by the present invention has the following beneficial effects: it can temporarily replace the double-layer sealing ring 17 for sealing, which buys time for the operation of the axial kettle, and solves the problem that the existing axial kettle sealing device with variable shaft diameter generally does not have a sealing adjustment device. In actual use, if the sealing ring is severely worn, it may cause the sealing effect to decrease, making the axial kettle unable to operate normally.

[0019] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal device for an axial kettle with a variable shaft diameter, characterized by: The invention comprises a guide ring (1), wherein the inner side of the guide ring (1) is threadedly connected with a plurality of fixing bolts (2), the bottom end of the guide ring (1) is integrally formed with an annular frame (3), the outer periphery of the annular frame (3) is integrally formed with an annular plate (4), the bottom end of the annular frame (3) is fixedly welded with a plurality of first springs (5), the side of the plurality of first springs (5) away from the annular frame (3) is fixedly welded with a guide column (6), the side of the annular frame (3) away from the guide ring (1) is integrally formed with a moving ring (27), the side of the east ring away from the guide ring (1) is movably connected with a sealing gasket (9), the interior of the annular plate (4) is provided with a plurality of bolts (7), the outer walls of the plurality of bolts (7) are fixedly sleeved with a gasket (8), the side of the sealing gasket (9) away from the moving ring (27) is movably connected with a connecting ring (10), the outer wall of the connecting ring (10) is fixedly sleeved with a sealing belt (11), and the side of the sealing belt (11) away from the axis is provided with a plurality of balls (12); The outer wall of the connecting ring (10) is rotatably connected to a stationary ring (13), the outer wall of the stationary ring (13) is integrally formed with a reinforcement ring (14), and the inner side of the reinforcement ring (14) is threadedly connected to a plurality of fixing bolts (15), the inner side of the stationary ring (13) is provided with an inner ring (16), the inner side of the inner ring (16) is provided with a double-layer sealing ring (17), the inner side of the inner ring (16) is provided with a groove, and the interior of the groove is movably connected to a rubber ring (18), and the inner side of the groove is movably inserted with a flange seat (19); The outer fixed sleeve of the flange seat (19) is provided with a mounting collar (20), the interior of the rubber ring (18) is provided with a plurality of sliding holes (21), the top of the flange seat (19) is provided with a plurality of positioning rods (22), the outer wall of the flange seat (19) is provided with a plurality of bolt holes (23), the interior of the mounting collar (20) is provided with a plurality of bolts (24), the interior of the embedded ring (16) is provided with a plurality of limiting grooves, and the interiors of the plurality of limiting grooves are provided with a second spring (25), and the outer walls of the plurality of bolts (24) are fixedly provided with a second gasket (26).

2. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: The plurality of guide posts (6) are arranged through the inner side of the dynamic ring (27), and the side of the guide posts (6) away from the first spring (5) is movably connected to the outer wall of the sealing gasket (9).

3. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: The outer walls of the plurality of gasket rings (8) are movably connected to the top of the connecting collar (10), and the plurality of bolts (7) are connected to the internal threads of the connecting collar (10).

4. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: A plurality of engaging grooves are provided on a side of the connecting ring (10) close to the sealing gasket (9), and a positioning block matching the plurality of engaging grooves is provided on a side of the sealing gasket (9) close to the connecting sleeve.

5. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: The outer walls of the plurality of balls (12) are slidably connected to the inner side of the static ring (13); the sealing belt (11) is made of rubber material, and the edge of the sealing belt (11) is arranged in an arc shape; the outer wall of the sealing belt (11) is tightly fitted to the inner side of the static ring (13).

6. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: The outer wall of the rubber ring (18) is fitted together with the top of the flange seat (19), and the outer walls of the plurality of bolts (24) are connected together with the internal threads of the embedded ring (16). A displacement groove is provided inside the embedded ring (16), and the plurality of bolts (24) are arranged through the interior of the displacement groove.

7. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: The plurality of positioning rods (22) are arranged through the inner side of the sliding hole (21) on the rubber ring (18), and a positioning groove is provided on the inner side of the embedded ring (16). The plurality of positioning grooves are respectively arranged corresponding to the plurality of positioning rods (22), and the positioning rods (22) are arranged through the interior of the positioning grooves.

8. The mechanical seal device for an axial reactor with a variable shaft diameter according to claim 1, characterized in that: The double-layer sealing ring (17) is arranged above the sealing ring, the mounting collar (20) is arranged on the inner side of the static ring (13), and a rubber pad is arranged between the inner side of the static ring (13) and the outer side of the embedded ring (16).

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