High-stability low-cost side-entering stirrer

Abstract

The utility model discloses a high-stability low-cost side-entering stirrer, which solves the problems of complex structure and low stability of the side-entering stirrer in the prior art. The stirring device comprises a stirring shaft and a shell, a mechanical seal is arranged at one end of the stirring shaft and connected to the shell, a first bearing assembly is arranged at the other end of the stirring shaft and penetrates through the first bearing assembly to be connected with a driving assembly, the first bearing assembly is connected to the shell, and a second bearing assembly is further arranged between the stirring shaft and the shell. The stirring shaft is sleeved with a cup matched with the shell, and stirring blades are arranged at the end of the stirring shaft. The structure is simple, the stirring shaft is connected with the shell through the first bearing assembly, the second bearing assembly and the mechanical seal, three positioning points are arranged between the shell and the stirring shaft, rotation of the stirring shaft is more stable, the first bearing assembly, the second bearing assembly and the existing mechanical seal serve as rotating fulcrums, and the structure is simple; and replacement can be carried out according to a specific structure, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of side-entry stirrers, in particular to a high-stability and low-cost side-entry stirrer. Background Art

[0002] Side-entry agitator is a kind of agitating equipment widely used in desulfurization, denitrification and various large storage tanks or tanks. Installing side-entry agitators on various storage tanks in refineries and oil depot bases can agitate asphalt, residual oil, crude oil, fuel oil, diesel and other oil products to achieve the functions of blending, heat transfer, homogenization and preventing precipitation. The existing side-entry agitator has a complex structure, the cost of improving the mechanical seal is high, and it is not conducive to online replacement of the mechanical seal.

[0003] In the prior art, a side agitator disclosed in a Chinese utility information patent with announcement number CN 210410270 U and authorization announcement date of 2020.04.28, the side agitator includes a motor positioning flange, a main fixing frame, a main positioning flange, a sealing box, a blade, a second positioning bearing, a first positioning bearing, a main shaft and a motor. Although the patent connects the main shaft to the main positioning flange and the sealing box through the first positioning bearing and the second positioning bearing, the three control points effectively control the concentricity of the main shaft during rotation, so that the side agitator is stable, does not vibrate, has no abnormal noise, and runs smoothly, preventing the agitator shaft from reducing due to improper impact on the motor power output. However, this patent is not suitable for liquids, and the installation process is complicated. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a high-stability and low-cost side-entry agitator, which solves the problems of complex structure and low stability of the side-entry agitator in the prior art.

[0005] The technical solution of the utility model is achieved as follows: a high-stability, low-cost side-entry agitator comprises a stirring shaft and a casing, one end of the stirring shaft is provided with a mechanical seal, the mechanical seal is connected to the casing, the other end of the stirring shaft is provided with a first bearing assembly and is connected to a driving assembly through the first bearing assembly, the first bearing assembly is connected to the casing, a second bearing assembly is further provided between the stirring shaft and the casing, a cup matching the casing is sleeved on the stirring shaft, and a stirring blade is provided at the end of the stirring shaft.

[0006] The mechanical seal includes a sleeve and a connecting flange. The sleeve is arranged on the stirring shaft. A dynamic ring is installed on the sleeve. An alloy spring 1 is arranged between the sleeve and the dynamic ring. A connecting ring is arranged on the connecting flange. The connecting flange is connected to the outer shell through the connecting ring. A static ring that cooperates with the dynamic seal of the dynamic ring is installed on the connecting flange. An alloy spring 2 is arranged between the static ring and the connecting flange. An end cover is also connected to the connecting flange. A clamping piece for fixing the sleeve is also arranged on the sleeve.

[0007] Furthermore, a flange extension plate is sleeved on the connection flange, the flange extension plate is connected to the housing and the connection flange is fixed between the flange extension plate and the housing. A sealing ring 1 is provided between the dynamic ring and the shaft sleeve, and a sealing ring 2 is provided between the static ring and the connection flange.

[0008] Furthermore, the housing includes a shell, one end of the shell is provided with a mounting plate, the mounting plate is provided with a sealing seat matched with the mechanical seal, and the other end of the shell is provided with a connecting plate connected to the first bearing assembly.

[0009] Furthermore, the cup is provided with a sealing cone surface, which corresponds to the inspection cone surface provided on the sealing seat, and the sealing cone surface is provided with a sealing ring which cooperates with the inspection cone surface.

[0010] Furthermore, the second bearing assembly includes a second mounting ring, an outer ring of which is fixed inside the shell, and a second bearing seat that matches the stirring shaft is installed on the inner ring of the second mounting ring.

[0011] Furthermore, the first bearing assembly includes a mounting ring 1, an outer ring of which is fixedly connected to the mounting plate, and an inner ring of which is provided with a bearing seat 1 that matches the stirring shaft.

[0012] Furthermore, the driving assembly includes a driving motor, which is connected to the housing via long bolts. A transmission belt group is provided at the output end of the driving motor, and the driving motor is connected to the stirring shaft via the transmission belt group.

[0013] Furthermore, a conveyor belt box is provided outside the transmission belt assembly, and the connecting plate is fixed to the conveyor belt box by screws.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model has a simple structure. The stirring shaft is connected to the housing through the first bearing assembly, the second bearing assembly and the mechanical seal, so that two positioning points are arranged between the housing and the stirring shaft, so that the rotation of the stirring shaft is more stable, and the first bearing assembly, the second bearing assembly and the existing mechanical seal are used as the rotation fulcrum. The structure is simple and can be replaced according to the specific structure, the cost is low, and the problems of complex structure and low stability of the side-entry agitator in the prior art are solved.

[0016] 2. The cover and the sealing seat are arranged on the stirring shaft, so that the mechanical seal can be replaced online, further reducing the maintenance cost.

[0017] 3. Both the first bearing assembly and the second bearing assembly adopt a bearing seat, which can ensure the rotation of the shaft. At the same time, the bearing seat is connected to the shell through a mounting plate, thereby ensuring the stability between the stirring shaft and the shell.

[0018] 4. The driving motor is connected to the outer shell, and the connecting plate is connected to the conveyor belt box, which ensures the stability of the connection between the driving component and the outer shell, thereby improving the stability of the driving component in driving the stirring shaft to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a side view of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the utility model.

[0022] Figure 3 for Figure 2 A partial enlarged schematic diagram in the middle.

[0023] In the figure: 1. drive motor, 2. transmission belt assembly, 3. mounting plate, 4. mounting ring 1, 5. bearing seat 1, 6. mounting frame 1, 7. transition plate, 8. mounting frame 2, 9. connecting plate, 10. sealing seat, 11. cup, 12. sleeve, 13. stirring shaft, 14. stirring blade, 15. moving ring, 16. stationary ring, 17. connecting flange, 18. connecting ring, 19. transmission seat, 20. transmission ring, 21. end cover, 22. alloy spring 2, 23. alloy spring 1, 24. housing. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figures 1 to 3As shown, embodiment 1 is a high-stability, low-cost side-entry agitator, comprising an agitator shaft 13 and a housing, one end of the agitator shaft 13 is provided with a mechanical seal, the mechanical seal is connected to the housing, the other end of the agitator shaft 13 is provided with a first bearing assembly and is connected to the drive assembly through the first bearing assembly, the first bearing assembly is connected to the housing, a second bearing assembly is further provided between the agitator shaft 13 and the housing, a cup 11 matching the housing is sleeved on the agitator shaft 13, and a stirring blade 14 is provided at the end of the agitator shaft 13. The structure is simple, the agitator shaft 13 is connected to the housing through the first bearing assembly, the second bearing assembly and the mechanical seal, so that two positioning points for supporting the housing and the agitator shaft are provided between the housing and the agitator shaft 13, so that the rotation of the agitator shaft 13 is more stable, and the first bearing assembly, the second bearing assembly and the existing mechanical seal are used as the rotation fulcrum, the structure is simple, and can be replaced according to the specific structure, and the cost is low.

[0026] like Figure 3 As shown, embodiment 2 is a side-entry agitator with high stability and low cost, wherein the mechanical seal comprises a sleeve 12 and a connecting flange 17, wherein the sleeve 12 is sleeved on the agitator shaft 13, an O-ring for sealing connection is provided between the sleeve 12 and the agitator shaft 13, a dynamic ring 15 is installed on the sleeve 12, an alloy spring 1 23 is provided between the sleeve 12 and the dynamic ring 15, a connecting ring is provided on the connecting flange 17, the connecting flange 17 is connected to the housing through the connecting ring, a static ring 16 for dynamic sealing with the dynamic ring 15 is installed on the connecting flange 17, an alloy spring 22 is provided between the static ring 16 and the connecting flange 17, an end cover 21 is also connected to the connecting flange 17, and a clamping member for fixing the sleeve 12 is also provided on the sleeve 12. The dynamic ring 15 and the static ring 16 fit tightly under the action of the alloy spring 1 23 and the alloy spring 22 to ensure the sealing performance of the mechanical seal. The clamping member includes a transmission seat 19 and a transmission ring 20. The transmission ring 20 is sleeved on the shaft sleeve 12. The transmission seat 19 is sleeved on the wedge-shaped end of the transmission ring 20, and the transmission seat 19 is connected to the transmission ring 20 by a fastening screw. The transmission seat 19 and the transmission ring 20 are tightened by screws, thereby fastening the shaft sleeve 12 to the stirring shaft 13 to ensure a tight connection between the shaft sleeve 12 and the stirring shaft 13. In this structure, an adjustment groove that cooperates with the transmission ring 20 is provided at the end of the shaft sleeve 12. The smaller the groove is under the action of the clamping member, the tighter the connection between the shaft sleeve 12 and the stirring shaft 13.

[0027] In this embodiment, a flange extension plate 18 is sleeved on the connecting flange 17, the flange extension plate 18 is connected to the housing and the connecting flange 17 is fixed between the flange extension plate 18 and the housing, and an O-ring for sealing connection is provided between the flange extension plate 18 and the flange. A sealing ring 1 is provided between the moving ring 15 and the sleeve 12, and a sealing ring 2 is provided between the static ring 16 and the connecting flange 17. The sealing ring 1 is arranged outside the alloy spring 1 23 to prevent the medium from entering the alloy spring 1 23, and at the same time ensure the sealing of the connection between the moving ring 15 and the sleeve 12. The sealing ring 2 is arranged outside the alloy spring 22 to prevent the medium from entering the alloy spring 22, and at the same time ensure the sealing between the static ring 16 and the connecting flange 17.

[0028] The other structures are the same as those in Example 1.

[0029] like Figure 2 As shown, embodiment 3 is a high-stability, low-cost side-entry agitator, the outer shell includes a shell 24, one end of the shell 24 is provided with a mounting plate 3, the mounting plate 3 is provided with a sealing seat 10 that cooperates with the mechanical seal, and the other end of the shell 24 is provided with a connecting plate 9, and the connecting plate 9 is connected to the first bearing assembly. The shell 24 is provided with a mounting frame 16 and a mounting frame 28, one end of the mounting frame 16 is fixedly connected to the connecting plate 9, the other end of the mounting frame 16 is connected to the mounting frame 28 through a transition plate 7, and the other end of the mounting frame 28 is fixedly connected to the mounting plate 3. One end of the sealing seat 10 extends into the inner ring of the mounting plate 3 and fits the connecting flange 17, and an O-ring is provided between the connecting flange 17 and the sealing seat 10.

[0030] In this embodiment, a sealing cone surface is provided on the cup 11, and the sealing cone surface corresponds to the inspection cone surface provided on the sealing seat 10, and a sealing ring matching the inspection cone surface is provided on the sealing cone surface. The sealing seat cooperates with the cover, so that the mechanical seal of the device can be replaced online, further reducing the maintenance cost. The second bearing assembly includes a mounting ring 26, the outer ring of which is fixed inside the housing 24, and a bearing seat 25 matching the stirring shaft 13 is installed on the inner ring of the mounting ring 26. The first bearing assembly includes a mounting ring 14, the outer ring of which is fixedly connected to the mounting plate 3, and the inner ring of the mounting ring is installed with a bearing seat 15 matching the stirring shaft 13. Both the first bearing assembly and the second bearing assembly use a bearing seat, which can ensure the rotation of the rotating shaft. At the same time, the bearing seat is connected to the outer shell through the mounting plate 3, which ensures the stability between the stirring shaft 13 and the outer shell.

[0031] like Figure 1 and Figure 2As shown, in this embodiment, the driving assembly includes a driving motor 1, which is connected to the housing through a long bolt, and a transmission belt set 2 is provided at the output end of the driving motor 1, and the driving motor 1 is connected to the stirring shaft 13 through the transmission belt set 2. A conveyor belt box is provided on the outside of the transmission belt set, and a connecting plate 9 is fixed to the conveyor belt box by screws. The driving motor 1 is connected to the housing, and the connecting plate 9 is connected to the conveyor belt box, which ensures the stability of the connection between the driving assembly and the housing, thereby improving the stability of the driving assembly driving the stirring shaft 13 to rotate.

[0032] The other structures are the same as those in Example 2.

[0033] The process of replacing the mechanical seal is as follows: first remove the drive assembly and the agitator shaft, then remove the mounting ring on the bearing seat 1 and the housing, the bearing seat 2 and the corresponding mounting ring, and the clamping piece. Use the disassembly tool to disassemble the bearing seat 1 and the mounting ring 1 and move the agitator shaft relative to the housing so that the cup and the sealing seat on the housing are sealed and fit together to ensure the sealing when the mechanical seal is disassembled. Install a fixing device for fixing the agitator shaft in the housing to prevent the agitator shaft from rotating, remove the bearing seat 1 and the bearing seat 2 from the agitator shaft, use professional tools to disassemble and replace the mechanical seal, install the bearing seat 2 and the bearing seat set on the agitator shaft in turn, move the agitator shaft relative to the housing, and then fix the sleeve on the mechanical seal on the agitator shaft through the clamping piece, connect the bearing seat 2 with the mounting ring 2, and connect the bearing seat 1 with the mounting ring 1. Finally, install the drive assembly and the agitator shaft to achieve online replacement of the agitator.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high stability and low cost side-entry agitator, characterized by: The invention comprises a stirring shaft (13) and a housing, wherein one end of the stirring shaft (13) is provided with a mechanical seal, which is connected to the housing, the other end of the stirring shaft (13) is provided with a first bearing assembly and passes through the first bearing assembly to be connected to a driving assembly, the first bearing assembly is connected to the housing, a second bearing assembly is further provided between the stirring shaft (13) and the housing, a cover cup (11) which matches the housing is sleeved on the stirring shaft (13), and a stirring blade (14) is provided at the end of the stirring shaft (13).

2. The high stability and low cost side-entry agitator according to claim 1, characterized in that: The mechanical seal comprises a shaft sleeve (12) and a connecting flange (17); the shaft sleeve (12) is sleeved on the stirring shaft (13); a moving ring (15) is mounted on the shaft sleeve (12); an alloy spring (23) is arranged between the shaft sleeve (12) and the moving ring (15); a connecting ring is arranged on the connecting flange (17); the connecting flange (17) is connected to the housing via the connecting ring; a stationary ring (16) that cooperates with the moving ring (15) in a dynamic seal is mounted on the connecting flange (17); an alloy spring (22) is arranged between the stationary ring (16) and the connecting flange (17); an end cover (21) is further connected to the connecting flange (17); and a clamping member for fixing the shaft sleeve (12) is further arranged on the shaft sleeve (12).

3. The high stability and low cost side-entry agitator according to claim 2, characterized in that: A flange extension plate (18) is sleeved on the connecting flange (17), the flange extension plate (18) is connected to the outer shell, and the connecting flange (17) is fixed between the flange extension plate (18) and the outer shell.

4. The high stability and low cost side-entry agitator according to claim 3, characterized in that: A sealing ring 1 is provided between the moving ring (15) and the shaft sleeve (12), and a sealing ring 2 is provided between the stationary ring (16) and the connecting flange (17).

5. The high-stability and low-cost side-entry agitator according to any one of claims 2 to 4, characterized in that: The housing comprises a shell (24), one end of the shell (24) is provided with a mounting plate (3), the mounting plate (3) is provided with a sealing seat (10) matched with a mechanical seal, and the other end of the shell (24) is provided with a connecting plate (9), the connecting plate (9) is connected to the first bearing assembly.

6. The high stability and low cost side-entry agitator according to claim 5, characterized in that: The cup (11) is provided with a sealing cone surface, the sealing cone surface corresponds to the inspection cone surface provided on the sealing seat (10), and a sealing ring is provided on the sealing cone surface and cooperates with the inspection cone surface.

7. The high stability and low cost side-entry agitator according to claim 6, characterized in that: The second bearing assembly comprises a second mounting ring (26), the outer ring of which is fixed inside the housing (24), and a second bearing seat (25) which cooperates with the stirring shaft (13) is mounted on the inner ring of the second mounting ring (26).

8. The high stability and low cost side-entry agitator according to claim 6 or 7, characterized in that: The first bearing assembly comprises a mounting ring 1 (4), the outer ring of the mounting ring 1 (4) being fixedly connected to the mounting plate (3), and the inner ring of the mounting ring 1 (4) being provided with a bearing seat 1 (5) matching the stirring shaft (13).

9. The high stability and low cost side-entry agitator according to claim 8, characterized in that: The driving assembly comprises a driving motor (1), the driving motor (1) being connected to the housing via a long bolt, a transmission belt set (2) being provided at the output end of the driving motor (1), and the driving motor (1) being connected to the stirring shaft (13) via the transmission belt set (2).

10. The high stability and low cost side-entry agitator according to claim 9, characterized in that: A conveyor belt box is provided outside the transmission belt assembly (2), and a connecting plate (9) is fixed to the conveyor belt box by means of screws.

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