Slurry stirring device
By using inclined paddle-type mixing blades and a lifting device in the PVC slurry tank, the problems of mechanical seal wear and reducer failure in bottom-entry mixing devices were solved, achieving uniform slurry mixing and improved maintenance efficiency.
Patent Information
- Application Number
- CN202422653905.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the existing technology, bottom-entry mixing devices in PVC slurry tanks are prone to mechanical seal wear and frequent gear breakage of the reducer, and the maintenance process consumes a lot of manpower.
The device employs inclined paddle-type stirring blades and easily detachable and adjustable lifting devices, combined with the principle of mechanical degrees of freedom, to improve the turbulence effect in the slurry tank, reduce solid phase deposition, and support the reducer through the lifting device to avoid increasing external torque.
It effectively prevents mechanical seal wear, reduces the increase in gear torque and frequent gear grinding in the reducer, and improves maintenance efficiency and equipment operation stability.
Smart Images
Figure CN223542800U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a slurry mixing device. Background Technology
[0002] In the production of PVC raw materials by the calcium carbide method, the slurry after polymerization in the PVC polymerization reactor must undergo processes such as stripping and drying before qualified products can be produced. The slurry tank plays an important role in the stripping and drying process. The PVC slurry needs to be buffered in the slurry tank. In order to make the slurry solid and liquid uniform, the slurry stirring device mostly adopts bottom-entry stirring.
[0003] In bottom-entry mixers, the agitator blades are flat blades, which often cause the solid components of the slurry to settle to the bottom, damaging the mechanical seal. In addition, because the agitator blades are all submerged in the slurry, the blades are subjected to a large torque, which causes frequent gear breakage failures in the reducer. Furthermore, when repairing the reducer, a lot of manpower is required to disassemble and repair it.
[0004] Therefore, it is necessary to design a slurry mixing device to avoid mechanical seal wear failure and reduce the phenomenon of frequent gear grinding caused by external force leading to increased gear torque in the reducer. Utility Model Content
[0005] In view of the problems of the prior art, the purpose of this utility model is to provide a slurry mixing device to solve the problems of easy damage to mechanical seals and frequent gear breakage of reducers when bottom-entry mixers are used in PVC slurry tanks.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A slurry mixing device includes a slurry tank, a mixing blade inside the slurry tank, the bottom blade of the mixing blade being an inclined blade, a frame connected below the slurry tank, a reducer connected below the frame via a flange, a motor connected to the reducer, and two sets of lifting devices between the slurry tank and the motor.
[0008] More preferably, the lifting device includes a hook, a rope, and a turnbuckle. The hook is fixed to the bottom of the slurry tank and above the motor, and the hook and the turnbuckle are connected by the rope.
[0009] More preferably, the bottom of the slurry tank is provided with a mechanical seal.
[0010] More preferably, the frame is provided with a coupling that connects the stirring shaft and the output shaft of the reducer.
[0011] Compared with the prior art, this utility model has the following advantages:
[0012] 1. This utility model improves the turbulence of the slurry at the bottom of the slurry tank by changing the bottom blade from a flat blade to an inclined blade. This avoids the solid phase deposition of the slurry at the bottom caused by laminar flow, which could lead to mechanical seal wear during stirring and rotation. As a result, the PVC slurry is mixed evenly at the bottom of the slurry tank with a uniform solid content.
[0013] 2. Based on the actual operation of the bottom-entry mixer reducer and the principle of mechanical degrees of freedom, this utility model adds an easily detachable and adjustable lifting device, which enables the reducer to operate normally while satisfying its degrees of freedom during operation. This reduces the phenomenon of frequent gear breakage caused by increased gear torque due to external forces, reduces labor, and improves maintenance efficiency. Attached Figure Description
[0014] Figure 1 This is the front view of the present invention;
[0015] Figure 2 This is the right view of the present invention;
[0016] The meanings of the reference numerals in the attached diagram are as follows: 1. Slurry tank; 2. Bottom blade; 3. Mechanical seal; 4. Frame; 5. Coupling; 6. Reducer; 7. Motor; 8. Lifting device; 8-1. Hook; 8-2. Lifting rope; 8-3. Turnbuckle. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0019] like Figure 1 , 2As shown, a slurry mixing device includes a slurry tank 1, which carries the slurry and serves as a support for the mixing device. A mechanical seal 3 is provided at the bottom of the slurry tank 1 to seal the bottom and prevent slurry leakage. A mixing blade is installed inside the slurry tank 1, with the bottom blade 2 being an inclined blade to prevent slurry settling at the bottom of the slurry tank 1 and protect the mechanical seal 3. A frame 4 is connected below the slurry tank 1, and a reducer 6 is connected to the bottom of the frame 4 via a flange. The reducer 6 is connected to a motor 7. The reducer 6 reduces speed, increases torque, and protects the motor 7, which provides power to the entire mixing device. A coupling 5 is installed inside the frame 4, connecting the mixing shaft to the output shaft of the reducer 6, transmitting power to the mixing shaft and facilitating the disassembly and maintenance of the reducer. The frame 4 serves as a frame support for the coupling 5, connecting the slurry tank 1 and the reducer 6. Two sets of lifting devices 8 are provided between the slurry tank 1 and the motor 7. The entire lifting device 8 supports the reducer 6 and the motor 7, preventing the reducer 6 from being subjected to torque from other external forces, and facilitating adjustment and disassembly. The lifting device 8 includes a hook 8-1, a lifting rope 8-2, and a turnbuckle 8-3. The hook 8-1 is fixed at the bottom of the slurry tank 1 and above the motor 7, and the hook 8-1 and the turnbuckle 8-3 are connected by the lifting rope 8-2.
[0020] In practical use, when the motor 7 is started, the slurry enters the slurry tank 1. Under the action of the bottom blades 2, the slurry is in a turbulent form, which avoids the slurry forming laminar flow and depositing at the bottom, and the solid medium entering the mechanical seal 3, which would cause wear on the mechanical seal. The motor is directly hoisted by the lifting device 8, which consists of the hook 8-1, the rope 8-2 and the turnbuckle 8-3. This avoids the reducer 6 being affected by other external forces during operation, which would increase the degree of freedom constraint of the reducer 6 and cause frequent gear breakage. Moreover, during maintenance, the reducer can be removed for maintenance by directly disassembling the turnbuckle 8-3 and disconnecting the coupling 5.
[0021] This utility model changes the blades at the bottom of the slurry tank from a flat blade to an inclined blade. This improves the turbulence of the slurry at the bottom of the tank, preventing solid phase deposition caused by laminar flow and reducing mechanical seal wear. Based on the principle of mechanical degrees of freedom, the addition of an easily detachable and adjustable lifting device allows the reducer to operate normally while meeting its operational degrees of freedom. This reduces the phenomenon of increased gear torque and frequent gear breakage caused by external forces, reduces labor costs, and improves maintenance efficiency.
[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A slurry mixing device, comprising a slurry tank, characterized in that: The slurry tank (1) is equipped with a stirring blade. The bottom blade (2) of the stirring blade is a slanted blade. A frame (4) is connected below the slurry tank (1). A reducer (6) is connected below the frame (4) via a flange. A motor (7) is connected to the reducer (6). Two sets of lifting devices (8) are provided between the slurry tank (1) and the motor (7).
2. The slurry mixing device according to claim 1, characterized in that: The lifting device (8) includes a hook (8-1), a lifting rope (8-2), and a turnbuckle (8-3). The hook (8-1) is fixed at the bottom of the slurry tank (1) and above the motor (7). The hook (8-1) and the turnbuckle (8-3) are connected by the lifting rope (8-2).
3. The slurry mixing device according to claim 1, characterized in that: The bottom of the slurry tank (1) is equipped with a mechanical seal (3).
4. The slurry mixing device according to claim 1, characterized in that: The frame (4) is equipped with a coupling (5), which connects the stirring shaft and the output shaft of the reducer (6).