Special tool for maintaining mechanical seal of oil tank stirrer

Abstract

The utility model discloses a special tool for maintaining a mechanical seal of an oil tank stirrer, which relates to the technical field of maintenance tools and comprises a positioning screw and a positioning plate integrally welded with the positioning screw, the positioning plate is fixedly connected with a main shaft through a fixing bolt, a support cover is arranged on the side surface of a gearbox, and the positioning screw penetrates through and is slidably connected with the support cover. The positioning screw on the left side of the supporting cover is in threaded connection with a rotating nut, the supporting cover is connected to the positioning screw in a sleeving mode and fixed to the side face of the gearbox through the rotating nut, the positioning screw tightly pulls the main shaft, the fixing clamping sleeve is detached, the rotating nut is rotated, the positioning screw moves leftwards along the supporting cover, and then axial displacement of the main shaft is achieved. The mechanical seal is disassembled, a new mechanical seal is replaced and installed, the rotating nut is reversely rotated, the positioning screw moves rightwards along the supporting cover, axial reset of the main shaft is achieved, then the fixing clamping sleeve is installed, displacement and shaking of the main shaft are not prone to being caused, and the possibility that a gap is generated by the main shaft sealing ring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance tools, in particular to a special tool for repairing the mechanical seal of an oil tank agitator. Background Art

[0002] Agitators are used for blending high-quality products or preventing sediment accumulation in crude oil and fuel tanks to ensure uniform heating of the oil. As oil is stored in a tank, sediment accumulates thicker, causing the minimum liquid level to rise, significantly reducing the tank's effective volume. Furthermore, electrochemical corrosion caused by corrosive substances in the sediment can erode the tank interior. Using an agitator can quickly and effectively resolve this problem without polluting the environment or causing loss of effective substances, thereby improving economic efficiency.

[0003] At present, most oil tank agitators use side-in-depth agitators, which are mainly composed of a motor, a reducer, a main shaft, a fixed sleeve, a bracket and a propeller. Its working principle is to use the motor to drive the blades in the tank through the reducer to rotate, thereby driving the medium in the tank to form a circulating flow, so that the medium can be blended, heat transferred, homogenized and prevent sediment accumulation, and be taken away with the oil product.

[0004] During long-term use, it was found that the agitator mechanical seal is prone to medium leakage due to long-term wear. The biggest problem in replacing the mechanical seal is how to prevent the medium in the tank from leaking after the mechanical seal is disassembled. Since the agitator mechanical seal is prone to displacement and shaking of the main shaft during the replacement process, it may cause a gap in the main shaft sealing ring, causing the medium in the tank to leak. Utility Model Content

[0005] In order to overcome the defect in the prior art that the mechanical seal easily causes displacement and shaking of the main shaft during the replacement process, the utility model provides a special tool for repairing the mechanical seal of an oil tank agitator.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a special tool for repairing the mechanical seal of an oil tank agitator, including a positioning screw and a positioning plate welded to the positioning screw, the positioning plate is fixedly connected to the main shaft by a fixing bolt, a support cover is provided on the side of the gearbox, the positioning screw passes through and is slidably connected to the support cover, and a rotating nut is threadedly connected to the positioning screw on the left side of the support cover.

[0007] As a further improvement of the present invention, a threaded hole for fitting a fixing bolt is provided on the end face of the main shaft.

[0008] As a further improvement of the present invention, the rotating nut is a boss nut.

[0009] As a further improvement of the present invention, a groove for a position-limiting support cover is provided on the side of the gearbox.

[0010] As a further improvement of the present invention, a limiting sleeve plate sleeved on the main shaft is installed in the groove.

[0011] As a further improvement of the present invention, a rubber pad is provided on the right side of the support cover.

[0012] Compared with the prior art, the utility model has the beneficial effects: in this solution, a positioning plate is installed on the main shaft, a positioning screw is welded on the positioning plate, the support cover is sleeved on the positioning screw, and is fixed to the side of the gearbox by a rotating nut, so that the positioning screw tightly pulls the main shaft, the fixing sleeve is removed, and the rotating nut is rotated to make the positioning screw move to the left along the support cover, thereby realizing the axial displacement of the main shaft, the mechanical seal is removed, and a new mechanical seal is replaced and installed, and finally the rotating nut is rotated in the opposite direction by a tool to make the positioning screw move to the right along the support cover to realize the axial reset of the main shaft, and then the fixing sleeve is installed to complete the assembly. During the whole process, it is not easy to cause displacement and shaking of the main shaft, and the possibility of gaps in the main shaft sealing ring is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 The utility model is a structural schematic diagram of a special tool for repairing the mechanical seal of an oil tank agitator.

[0015] In the figure: 1. Positioning screw; 2. Positioning plate; 3. Fixing bolt; 4. Main shaft; 5. Gearbox; 6. Motor; 7. Support cover; 8. Rotating nut; 9. Fixing sleeve; 10. Flange bracket; 11. Mechanical seal; 12. Groove; 13. Limit sleeve. DETAILED DESCRIPTION

[0016] In order to make the technical solution and beneficial effects of the present invention more clearly understood, the present invention will be further described in detail below with reference to specific embodiments.

[0017] In the basic structure of the side-in-depth agitator, the main shaft 4 is installed in the gearbox 5 and driven to rotate by the motor 6. A fixed sleeve 9 connected to the main shaft 4 is provided on the gearbox 5 and the flange bracket 10, and a mechanical seal 11 connected to the main shaft 4 is installed on the flange bracket 10.

[0018] Reference Figure 1The embodiment of the utility model discloses a special tool for repairing the mechanical seal of an oil tank agitator, comprising a positioning screw 1 and a positioning plate 2 welded to the positioning screw 1 as a whole, the positioning plate 2 is fixedly connected to the main shaft 4 by a fixing bolt 3, a support cover 7 is provided on the side of the gearbox 5, the positioning screw 1 passes through and is slidably connected to the support cover 7, and a rotating nut 8 is threadedly connected to the positioning screw 1 on the left side of the support cover 7.

[0019] First, a threaded hole for matching the fixing bolt 3 is provided on the end face of the main shaft 4, and a positioning plate 2 is installed on the main shaft 4. A positioning screw 1 is welded on the positioning plate 2, and the support cover 7 is sleeved on the positioning screw 1 and fixed to the side of the gearbox 5 by rotating the nut 8, so that the positioning screw 1 tightly pulls the main shaft 4, and then remove the gearbox 5 and the fixing sleeve 9 on the flange bracket 10, and rotate the rotating nut 8 with a tool to make the positioning screw 1 move to the left along the support cover 7, thereby realizing the axial displacement of the main shaft 4, remove the mechanical seal 11, replace and install a new mechanical seal, and finally rotate the rotating nut 8 in the opposite direction with a tool to make the positioning screw 1 move to the right along the support cover 7 to realize the axial reset of the main shaft 4, and then install the fixing sleeve 9 to complete the assembly.

[0020] The rotating nut 8 is a boss nut, which increases the threaded connection length between the rotating nut 8 and the positioning screw 1, making the positioning screw 1 more stable and not easy to break.

[0021] The side of the gearbox 5 is provided with a groove 12 for limiting the support cover 7. A limiting sleeve 13, which is sleeved onto the main shaft 4, is installed in the groove 12. The limiting sleeve 13 acts as a circumferential limiter, improving the stability of the axial displacement of the main shaft 4. The right side of the support cover 7 is limited in the groove 12 and is in close contact with the limiting sleeve 13. A rubber pad is provided on the right side of the support cover 7 to ensure a more stable installation of the support cover 7 and prevent it from sliding, thereby ensuring greater stability of the main shaft 4 during axial movement.

[0022] It should be understood that the specific embodiments described herein are only used to understand the present invention and are not used to limit the present invention. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A special tool for repairing the mechanical seal of an oil tank agitator, characterized by: The invention comprises a positioning screw (1) and a positioning plate (2) welded to the positioning screw (1) as a whole, the positioning plate (2) being fixedly connected to the main shaft (4) via a fixing bolt (3), a support cover (7) being provided on the side of the gearbox (5), the positioning screw (1) passing through and slidingly connected to the support cover (7), and a rotating nut (8) being threadedly connected to the positioning screw (1) on the left side of the support cover (7).

2. The special tool for repairing the mechanical seal of an oil tank agitator according to claim 1, characterized in that: A threaded hole for matching the fixing bolt (3) is provided on the end surface of the main shaft (4).

3. The special tool for repairing the mechanical seal of an oil tank agitator according to claim 2, characterized in that: The rotating nut (8) is a boss nut.

4. The special tool for repairing the mechanical seal of an oil tank agitator according to claim 3, characterized in that: A groove (12) for limiting the support cover (7) is provided on the side surface of the gearbox (5).

5. The special tool for repairing the mechanical seal of an oil tank agitator according to claim 4, characterized in that: A limiting sleeve (13) sleeved on the main shaft (4) is installed in the groove (12).

6. The special tool for repairing the mechanical seal of an oil tank agitator according to claim 5, characterized in that: The right side of the support cover (7) is provided with a rubber pad.

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