A shaft sealing structure with good sealing performance for reactor

Abstract

The present invention discloses a shaft sealing structure with good sealing performance for a reactor, which relates to the technical field of shaft sealing, and comprises a stationary ring, which is inserted into the reactor cover, and a clamping ring is sleeved on the stationary ring, and the clamping ring is fixed to the stationary ring by at least two first screws, and the top of the stationary ring is threadedly connected with a clamping ring, and the stirring shaft passes through the middle of the stationary ring, the reactor cover and the clamping ring, and at least two moving rings are placed between the stationary ring and the stirring shaft, and at least one annular rubber ring is fixed to the outer ring of the moving ring. This structure adopts a combined fixed splicing, and this design makes it easier to partially disassemble and replace the moving ring and the first conical rubber ring after the annular rubber ring is worn, and can be replaced during the operation of the reactor, avoiding production interruption caused by replacement of seals, reducing maintenance costs and downtime, and improving the ability of continuous operation.

Description

Technical Field

[0001] The invention relates to the technical field of shaft sealing, and in particular to a shaft sealing structure with good sealing performance for a reactor. Background Art

[0002] As a key chemical production equipment, the reactor usually carries out chemical reactions at high pressure and temperature involving highly corrosive media. Therefore, it is crucial to ensure the high sealing performance of the reactor's stirring shaft. This is not only related to production efficiency, but also directly related to safe production and environmental compliance.

[0003] Mechanical seal is a common shaft seal structure for reactors. It is mainly used to prevent the reaction medium from leaking from the gap between the stirring shaft and the reactor cover, and also to prevent external impurities from entering the reactor. It consists of a moving ring and a stationary ring. The moving ring is fixed to the stirring shaft, and the stationary ring is fixed to the reactor cover. The two are kept in close contact through the rubber ring on the moving ring to prevent medium leakage. However, the rubber ring of the moving ring is prone to wear during long-term rotation, which affects the sealing performance. The moving ring is fixed to the stirring shaft and is not easy to disassemble and replace. Usually, large-scale overhaul or even complete replacement is necessary, which not only increases the complexity and cost of maintenance work, but also may affect the continuity and efficiency of production due to the cumbersome process of equipment disassembly and reassembly. Especially during operation, in the face of small-scale damage to the seal, there is a lack of immediate and convenient replacement solutions, which further limits the flexibility and response speed of maintenance.

[0004] Based on the above situation, the present invention proposes a shaft sealing structure of a reactor with good sealing performance. Summary of the invention

[0005] In order to overcome the disadvantage that the sealing structure is difficult to replace and repair after being worn, the present invention provides a shaft sealing structure of a reactor with good sealing performance.

[0006] A shaft sealing structure with good sealing performance for a reactor, comprising a stationary ring, the stationary ring being inserted into a reactor cover, a clamping ring being sleeved on the stationary ring, the clamping ring being fixed to the stationary ring by at least two first screws, the top of the stationary ring being threadedly connected with a clamping ring, the stirring shaft passing through the middle of the stationary ring, the reactor cover and the clamping ring, at least two moving rings being placed between the stationary ring and the stirring shaft, at least one annular rubber ring being fixedly connected to the outer ring of the moving ring, the annular rubber ring being used to enhance the sealing performance between the stationary ring and the moving ring, at least two first conical rubber rings being placed between the stirring shaft and the moving ring, adjacent moving rings and the first conical rubber rings forming a group of rotating parts, and gaskets being placed between adjacent rotating parts.

[0007] As a preferred technical solution of the present invention, it also includes a plurality of second screws, which are threadedly connected to the clamping ring. The second screws are in contact with the clamping ring, and the clamping ring is fixed to the reactor cover by the second screws, and the clamping ring is fixed to the stationary ring at the same time.

[0008] As a preferred technical solution of the present invention, it also includes a liquid injection cylinder symmetrically distributed along the static ring, the liquid injection cylinder is threadedly connected to the static ring, a one-way valve tube is slidably connected inside the liquid injection cylinder, and the liquid injection cylinder and the adjacent one-way valve tube form a cylinder-piston structure.

[0009] As a preferred technical solution of the present invention, the one-way valve tube limits the lubricating oil from flowing into the adjacent injection cylinder in one direction.

[0010] As a preferred technical solution of the present invention, it also includes a swivel ring, which is fixedly connected to the stirring shaft, and is slidably connected to a circumferential array of push blocks, a first spring is fixedly connected between the push blocks and the swivel, and the retaining ring is slidably connected to a push rack, and the outer end of the one-way valve tube is fixedly connected to an inclined plate, one side of the push rack is squeezed and fitted with the adjacent inclined plate, and the other side of the push rack is squeezed and fitted with the adjacent push block.

[0011] As a preferred technical solution of the present invention, the push frame is composed of an annular plate and two round rods.

[0012] As a preferred technical solution of the present invention, it also includes a contact switch, which is fixed to the push frame, the clamping ring is fixed with an alarm, the contact switch moves downward to contact the alarm, and the contact switch is electrically connected to the alarm through a control module.

[0013] As a preferred technical solution of the present invention, it also includes a fixing frame symmetrically distributed along the pushing frame, the fixing frame is fixedly connected to the pushing frame, the clamping ring is slidably connected to a guide frame in a horizontal direction, the guide frame has an inclined groove for guiding, the fixing frame is slidably connected to an adjacent inclined groove, the pushing frame is slidably connected to a circular ring plate in an up-and-down direction, the circular ring plate is extruded and matched with the guide frame, the clamping ring is fixedly connected to a second spring, the second spring is fixedly connected to a pull rod symmetrically distributed along the circular ring plate, the top end of the pull rod contacts the circular ring plate, when the second spring is compressed, the bottom end of the pull rod contacts the clamping ring, the static ring is slidably connected to a pull frame in an up-and-down direction, the pull frame is fixedly connected to a second conical rubber ring for sealing the contact surface between the static ring and the stirring shaft, the second conical rubber ring is located on the lower side of the static ring, and the stirring shaft passes through the middle of the second conical rubber ring.

[0014] As a preferred technical solution of the present invention, the fixing frame is configured as an inverted U shape.

[0015] As a preferred technical solution of the present invention, the pull frame is composed of an annular plate and two L-shaped rods.

[0016] The present invention has the following advantages: the structure adopts a combined fixed splicing, and this design makes it easier to partially disassemble and replace the dynamic ring and the first conical rubber ring after the annular rubber ring is worn, and can be replaced during the operation of the reactor, avoiding production interruptions caused by replacement of seals, reducing maintenance costs and downtime, and improving the ability of continuous operation.

[0017] In the present structure, the dynamic ring with the annular rubber ring and the first conical rubber ring are both short and multiple, which not only enhances the sealing effect between the static ring and the stirring shaft, but also during maintenance and replacement, only the dynamic ring with the annular rubber ring and the first conical rubber ring with failed sealing need to be replaced instead of all of them, thus saving materials.

[0018] Through the arrangement of the injection cylinder and the one-way valve tube, this structure can inject lubricating oil into the space between the static ring and the dynamic ring at any time, thereby reducing the friction and wear between the static ring and the dynamic ring. Through continuous lubrication protection, the service life of the components is effectively extended, the need for frequent maintenance is reduced, and the tightness of the seal is enhanced, further improving the overall sealing performance.

[0019] This structure realizes regular and automatic injection of lubricating oil through the setting of components such as swivel rings, push blocks, push racks and inclined plates, performs preventive maintenance on static rings and dynamic rings, and intervenes in potential wear problems in advance. Compared with large-scale repairs or replacements after a failure, this solution is more economical and efficient and reduces the risk of sudden failures.

[0020] This structure uses the setting of the contact switch and the alarm device so that when the lubricating oil leakage or loss reaches the warning amount, the alarm device is triggered to sound an alarm, reminding people of the lubricating oil leakage or loss in time, so that they can check and repair or replenish the lubricating oil as soon as possible.

[0021] In the two special situations of disassembly and replacement and lubricating oil loss, this structure automatically realizes that the second conical rubber ring slides upward and wedges between the contact surface of the static ring and the stirring shaft to perform auxiliary sealing, avoiding the two special situations that lead to the weakening of the sealing performance of the shaft sealing structure, thereby preventing the reaction medium in the reactor from leaking in these two special situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the stationary ring, the clamping ring and other components of the present invention.

[0024] Figure 3 This is a three-dimensional structural separation diagram of the components such as the dynamic ring, the first conical rubber ring and the gasket of the present invention.

[0025] Figure 4 It is a three-dimensional structural schematic diagram of components such as a gasket, a liquid injection cylinder and a one-way valve tube of the present invention.

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the components such as the rotating ring, the push block and the first spring of the present invention.

[0027] Figure 6 It is a three-dimensional structural schematic diagram of the liquid injection cylinder, the one-way valve tube, the push frame and the inclined plate of the present invention.

[0028] Figure 7 It is a three-dimensional structural schematic diagram of the push frame, contact switch, alarm and other components of the present invention.

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the fixing frame, the guide frame, the circular ring plate and other components of the present invention.

[0030] Fig. 9 It is a three-dimensional structural schematic diagram of the pull rod, the second spring, the pull frame and other components of the present invention.

[0031] The names and serial numbers of the parts in the figure are: 1: static ring, 101: stirring shaft, 102: reactor cover, 2: clamping ring, 201: first screw, 3: clamping ring, 4: second screw, 5: moving ring, 6: annular rubber ring, 7: first conical rubber ring, 8: gasket, 9: injection cylinder, 10: one-way valve tube, 11: swivel, 12: push block, 13: first spring, 14: push frame, 141: inclined plate, 15: contact switch, 16: alarm, 17: fixing frame, 18: guide frame, 19: circular ring plate, 20: pull rod, 21: second spring, 22: pull frame, 23: second conical rubber ring. DETAILED DESCRIPTION

[0032] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0033] Embodiment 1: A shaft sealing structure with good sealing performance for a reactor, such as Figures 1 to 3As shown, it includes a stationary ring 1, which is inserted into the reactor cover 102. A clamping ring 2 is sleeved on the stationary ring 1. The clamping ring 2 is fixed to the stationary ring 1 by two left and right first screws 201. The top of the stationary ring 1 is threadedly connected with a clamping ring 3. The stirring shaft 101 passes through the middle of the stationary ring 1, the reactor cover 102 and the clamping ring 3. Four second screws 4 are threadedly connected to the clamping ring 3. The bottom ends of the second screws 4 are in contact with the clamping ring 2. The clamping ring 2 can be fixed to the reactor cover 102 by the second screws 4, and the clamping ring 3 can also be fixed to the stationary ring 1. The stationary ring 1 and Two upper and lower moving rings 5 ​​are placed between the stirring shaft 101. The moving ring 5 is made of rubber material. The outer ring of the moving ring 5 is fixed with two upper and lower annular rubber rings 6. Two upper and lower first conical rubber rings 7 are placed between the stirring shaft 101 and the moving ring 5. The stirring shaft 101 drives the first conical rubber ring 7 to rotate through friction, thereby driving the moving ring 5 to rotate. When the moving ring 5 rotates, the annular rubber ring 6 ensures the sealing between the moving ring 5 and the static ring 1. The adjacent moving rings 5 ​​and the first conical rubber rings 7 constitute a group of rotating parts, and gaskets 8 are placed between adjacent rotating parts.

[0034] This is a shaft sealing structure that mechanically seals the gap between the stirring shaft 101 and the reactor cover 102. The specific installation operation is as follows: first, the static ring 1 is passed through the shaft hole in the center of the reactor cover 102 from bottom to top, so that the lower part of the static ring 1 contacts the bottom of the reactor cover 102. Next, the stirring shaft 101 passes through the static ring 1, and then the upper and lower rotating parts (dynamic ring 5 and first conical rubber ring 7) are sealed and placed between the static ring 1 and the stirring shaft 101, so that the first conical rubber ring 7 contacts the stirring shaft 101, the dynamic ring 5 contacts the static ring 1, and ... A gasket 8 is placed between the rotating parts (dynamic ring 5 and the first conical rubber ring 7). Subsequently, a clamping ring 2 is placed on the static ring 1 so that the clamping ring 2 contacts the top of the reactor cover 102. Finally, the clamping ring 3, the first screw 201 and the second screw 4 are screwed on in sequence. When the clamping ring 3 is screwed on, the clamping ring 3 will apply pressure to the top dynamic ring 5 and the first conical rubber ring 7 on the remaining layers of rotating parts, so that the dynamic ring 5 and the first conical rubber ring 7 are compressed to improve the sealing between the static ring 1 and the stirring shaft 101. The gasket 8 can provide stable supporting force during this process.

[0035] After installation, when the stirring shaft 101 rotates, the first conical rubber ring 7 can drive the moving ring 5 to rotate on the stationary ring 1. When the moving ring 5 rotates on the stationary ring 1, the annular rubber ring 6 ensures the sealing between the moving ring 5 and the stationary ring 1.

[0036] When the annular rubber ring 6 and the first conical rubber ring 7 are severely worn and need to be replaced, the specific disassembly operation is as follows: unscrew the second screw 4, then unscrew the clamping ring 3, remove the worn annular rubber ring 6 and the first conical rubber ring 7, replace them with new annular rubber ring 6 and the first conical rubber ring 7, and finally screw on the clamping ring 3 and the second screw 4 in sequence.

[0037] In summary, compared with the prior art, the present invention adopts a combined fixed splicing. This design makes it easier to partially disassemble and replace the dynamic ring 5 and the first conical rubber ring 7 after the annular rubber ring 6 is worn, and can be replaced during the operation of the reactor, avoiding production interruptions caused by seal replacement, reducing maintenance costs and downtime, and improving the ability of continuous operation.

[0038] At the same time, the dynamic ring 5 with the annular rubber ring 6 inside and the first conical rubber ring 7 are both short and multiple, which not only enhances the sealing effect between the static ring 1 and the stirring shaft 101, but also during maintenance and replacement, only the dynamic ring 5 with the annular rubber ring 6 and the first conical rubber ring 7 with failed sealing need to be replaced instead of all of them, thus saving materials.

[0039] Embodiment 2: Based on embodiment 1, Figure 4 As shown, it also includes a liquid injection cylinder 9 which is symmetrically distributed along the static ring 1. The liquid injection cylinder 9 is threadedly connected to the static ring 1. A one-way valve tube 10 is slidably connected inside the liquid injection cylinder 9. The one-way valve tube 10 limits the one-way flow of lubricating oil into the adjacent liquid injection cylinder 9. The liquid injection cylinder 9 and the adjacent one-way valve tube 10 constitute a cylinder-piston structure.

[0040] After the shaft sealing structure is installed, screw the injection cylinder 9 onto the stationary ring 1 and inject lubricating oil into the one-way valve tube 10. The lubricating oil flows into the injection cylinder 9 and then flows between the stationary ring 1 and the dynamic ring 5, thereby reducing the friction and wear between the stationary ring 1 and the dynamic ring 5. Through continuous lubrication protection, the service life of the components is effectively extended, the need for frequent maintenance is reduced, and the tightness of the seal is enhanced, thereby further improving the overall sealing performance. When the lubricating oil is partially lost, the one-way valve tube 10 is appropriately pushed inward to allow the lubricating oil in the injection cylinder 9 to be injected in an appropriate amount to make up for the lost lubricating oil.

[0041] like Figure 5 and Figure 6 As shown, it also includes a swivel ring 11, which is fixedly connected to the stirring shaft 101. The swivel ring 11 is slidably connected to six circumferentially arrayed push blocks 12 in the up-down direction. A first spring 13 is fixedly connected between the push blocks 12 and the swivel ring 11. The clamping ring 3 is slidably connected to a push rack 14 in the up-down direction. The push rack 14 is composed of an annular plate and two round rods. The outer end of the one-way valve tube 10 is fixedly connected to an inclined plate 141. The bottom side of the annular plate of the push rack 14 is squeezed and fitted with the adjacent inclined plate 141, and the top end of the round rod of the push rack 14 is intermittently squeezed and fitted with the bottom of the adjacent push block 12.

[0042] When the stirring shaft 101 is working and rotating, the rotating ring 11 is driven to rotate, thereby driving the push block 12 and the first spring 13 to rotate. If the lubricating oil is not lost, the one-way valve tube 10 presses against the push frame 14 through the inclined plate 141, so that when the push block 12 rotates and contacts the top of the round rod of the push frame 14, the round rod of the push frame 14 squeezes the push block 12 to slide upward, and the first spring 13 is compressed. When the push block 12 continues to rotate and disengages from the push frame 14, the first spring 13 resets and drives the push block 12 to slide downward and reset.

[0043] If the lubricating oil is lost, when the push block 12 rotates and contacts the top of the round rod of the push frame 14, it will push the push frame 14 to slide downward adaptively, and the annular plate of the push frame 14 squeezes the one-way valve tube 10 through the inclined plate 141 to slide adaptively inward along the injection cylinder 9, thereby automatically and adaptively compensating for the lost lubricating oil. As the lubricating oil is replenished, the one-way valve tube 10 drives the inclined plate 141 to move outward, thereby pushing the push frame 14 to slide upward and reset.

[0044] In summary, the present invention performs preventive maintenance on the stationary ring 1 and the dynamic ring 5 by automatically injecting lubricating oil at regular intervals, and intervenes in potential wear problems in advance. Compared with large-scale repairs or replacements after a failure, this solution is more economical and efficient, and reduces the risk of sudden failures.

[0045] like Figure 7 As shown, a contact switch 15 is also included. The contact switch 15 is fixed to the bottom front side of the push frame 14. An alarm 16 is fixed to the top of the clamp ring 2. The contact switch 15 moves downward to contact the alarm 16. The contact switch 15 is electrically connected to the alarm 16 through the control module.

[0046] The push frame 14 moves up and down, driving the contact switch 15 to move up and down. When the contact switch 15 moves downward to contact the alarm 16, at this time, the leakage or loss of the lubricating oil reaches the warning amount, and the alarm 16 is triggered to sound an alarm, reminding people in time that the lubricating oil is leaking or losing, so that they can check and repair or replenish the lubricating oil as soon as possible.

[0047] Embodiment 3: Based on embodiment 2, Figure 8 and Fig. 9As shown, it also includes a fixing frame 17 symmetrically distributed along the push frame 14, the fixing frame 17 is fixedly connected to the push frame 14, the fixing frame 17 is set to an inverted U shape, the clamp ring 3 is slidably connected to the guide frame 18 along the left and right directions, the guide frame 18 has an inclined groove for guiding, the fixing frame 17 passes through the adjacent inclined grooves, and the fixing frame 17 is slidably connected to the adjacent inclined grooves, the push frame 14 is slidably connected to the circular plate 19 along the up and down directions, the circular plate 19 is pressed and matched with the guide frame 18, the clamp ring 2 is fixedly connected to the second spring 21, and the second spring 21 is fixedly connected to the pull rod 20 symmetrically distributed along the circular plate 19. The top end of the pull rod 20 contacts the circular ring plate 19. When the second spring 21 is compressed, the bottom end of the pull rod 20 contacts the clamping ring 2. The inner lower side of the stationary ring 1 is slidably connected with a pull rack 22 in the up and down directions. The pull rack 22 is composed of an annular plate and two L-shaped rods. The L-shaped rods of the pull rack 22 are fixedly connected to the adjacent pull rod 20. The top of the annular plate of the pull rack 22 is fixedly connected with a second conical rubber ring 23 for sealing the contact surface between the stationary ring 1 and the stirring shaft 101. The second conical rubber ring 23 is located on the lower side of the inside of the stationary ring 1, and the stirring shaft 101 passes through the middle of the second conical rubber ring 23.

[0048] During disassembly and replacement, the original annular rubber ring 6 and the first conical rubber ring 7 will be removed, and when the lubricating oil is lost, the wear of the annular rubber ring 6 and the first conical rubber ring 7 will be aggravated. Both of these special cases will lead to a weakening of the sealing performance of the shaft sealing structure. Therefore, in these two special cases, the second conical rubber ring 23 needs to automatically slide upward and wedge into the contact surface between the stationary ring 1 and the stirring shaft 101 to perform auxiliary sealing. In other conventional cases, the second conical rubber ring 23 is wedged out from the contact surface between the stationary ring 1 and the stirring shaft 101 to avoid serious wear of the second conical rubber ring 23 caused by the conventional operation of the stirring shaft 101, thereby failing to perform auxiliary sealing in special cases. The specific description is as follows:

[0049] It will automatically seal during disassembly and maintenance: when the retaining ring 3 is unscrewed, the push frame 14, the fixing frame 17, the guide frame 18, and the circular ring plate 19 are removed together with the retaining ring 3. At this time, the circular ring plate 19 is disengaged from the pull rod 20, so that the pull rod 20 is no longer squeezed by the circular ring plate 19, and the second spring 21 in the compressed state is reset to drive the pull rod 20 to move upward, so that the bottom end of the pull rod 20 is disengaged from the retaining ring 2, and the pull rod 20 drives the pull frame 22 to slide upward, thereby driving the second conical rubber ring 23 to slide upward and wedge between the contact surfaces of the stationary ring 1 and the agitator shaft 101, so as to achieve sealing between the contact surfaces of the stationary ring 1 and the agitator shaft 101.

[0050] It will automatically seal when the lubricating oil is lost: when the push frame 14 drives the contact switch 15 to move downward until it contacts the alarm 16, the push frame 14 also drives the fixed frame 17 to move downward, and the fixed frame 17 squeezes the guide frame 18 through the inclined groove to slide to the side away from the circular ring plate 19, so that the guide frame 18 no longer squeezes the circular ring plate 19, thereby making the pull rod 20 no longer squeezed by the circular ring plate 19. At this time, the second spring 21 in the compressed state resets and drives the pull rod 20 to move upward and disengage from the clamping ring 2, and the pull rod 20 drives the pull frame 22 to slide upward, thereby driving the second conical rubber ring 23 to slide upward and wedge between the contact surfaces of the stationary ring 1 and the agitator shaft 101, so as to achieve sealing between the stationary ring 1 and the agitator shaft 101.

[0051] In summary, in the two special situations of disassembly and replacement and lubricating oil loss, the present invention automatically realizes that the second conical rubber ring 23 slides upward and wedges between the contact surface of the stationary ring 1 and the stirring shaft 101 to perform auxiliary sealing, thereby avoiding the two special situations that lead to the weakening of the sealing performance of the shaft sealing structure, thereby preventing the reaction medium in the reactor from leaking in these two special situations.

[0052] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A shaft sealing structure with good sealing performance for a reactor, characterized by: The invention comprises a stationary ring (1), wherein the stationary ring (1) is inserted into a reactor cover (102), a clamping ring (2) is sleeved on the stationary ring (1), and the clamping ring (2) is fixed to the stationary ring (1) by at least two first screws (201), a clamping ring (3) is threadedly connected to the top of the stationary ring (1), and a stirring shaft (101) passes through the stationary ring (1), the reactor cover (102) and the clamping ring (3), and the stationary ring (1) and the stirring shaft (101) are connected to each other. At least two moving rings (5) are placed between the moving rings (5), the outer ring of the moving ring (5) is fixedly connected with at least one annular rubber ring (6), the annular rubber ring (6) is used to enhance the sealing between the stationary ring (1) and the moving ring (5), at least two first conical rubber rings (7) are placed between the stirring shaft (101) and the moving ring (5), adjacent moving rings (5) and first conical rubber rings (7) form a group of rotating parts, and a gasket (8) is placed between adjacent rotating parts; It also includes injection cylinders (9) symmetrically distributed along the stationary ring (1), the injection cylinders (9) being threadedly connected to the stationary ring (1), a one-way valve tube (10) being slidably connected inside the injection cylinder (9), the one-way valve tube (10) limiting the one-way flow of lubricating oil into the adjacent injection cylinder (9), the injection cylinder (9) and the adjacent one-way valve tube (10) forming a cylinder-piston structure; The invention also comprises a rotating ring (11), wherein the rotating ring (11) is fixedly connected to the stirring shaft (101), and the rotating ring (11) is slidably connected to a circumferential array of push blocks (12), and a first spring (13) is fixedly connected between the push blocks (12) and the rotating ring (11), and the clamping ring (3) is slidably connected to a push frame (14), and the push frame (14) is composed of an annular plate and two round rods. The outer end of the one-way valve tube (10) is fixedly connected to an inclined plate (141), and one side of the push frame (14) is pressed and fitted with the adjacent inclined plate (141), and the other side of the push frame (14) is pressed and fitted with the adjacent push block (12).

2. The shaft sealing structure of a reactor with good sealing performance according to claim 1 is characterized by: It also includes a plurality of second screws (4), wherein the second screws (4) are threadedly connected to the clamping ring (3), and the second screws (4) are in contact with the clamping ring (2). The clamping ring (2) is fixed to the reactor cover (102) by the second screws (4), and the clamping ring (3) is fixed to the stationary ring (1) at the same time.

3. The shaft sealing structure of a reactor with good sealing performance according to claim 2 is characterized in that: The device also includes a contact switch (15), the contact switch (15) being fixedly connected to the push frame (14), the clamping ring (2) being fixedly connected to an alarm (16), the contact switch (15) moving downward to contact the alarm (16), and the contact switch (15) being electrically connected to the alarm (16) via a control module.

4. The shaft sealing structure of a reactor with good sealing performance according to claim 3 is characterized by: The push frame (14) further comprises a fixing frame (17) symmetrically distributed along the push frame (14), the fixing frame (17) being fixedly connected to the push frame (14), the clamping ring (3) being slidably connected to a guide frame (18) in a horizontal direction, the guide frame (18) being provided with an inclined groove for guiding, the fixing frame (17) being slidably connected to an adjacent inclined groove, the push frame (14) being slidably connected to a circular plate (19) in an up-down direction, the circular plate (19) being pressed and fitted with the guide frame (18), the clamping ring (2) being fixedly connected to a second spring (21), the second spring (21) being fixedly connected to a plurality of springs symmetrically distributed along the circular plate (19). The pull rod (20) is provided with a cloth, the top end of the pull rod (20) contacts the annular plate (19), when the second spring (21) is compressed, the bottom end of the pull rod (20) contacts the clamping ring (2), the stationary ring (1) is slidably connected to a pull frame (22) in the up-down direction, the pull frame (22) is fixed with a second conical rubber ring (23) for sealing the contact surface between the stationary ring (1) and the stirring shaft (101), the second conical rubber ring (23) is located on the lower side of the stationary ring (1), and the stirring shaft (101) passes through the middle of the second conical rubber ring (23).

5. The shaft sealing structure of a reactor with good sealing performance according to claim 4 is characterized in that: The fixing frame (17) is configured in an inverted U shape.

6. The shaft sealing structure of a reactor with good sealing performance according to claim 5 is characterized by: The pull frame (22) is composed of an annular plate and two L-shaped rods.

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