Adjustable slurry stirrer

Abstract

The utility model discloses an adjustable slurry stirrer which comprises a base, a motor, a speed reducer, a coupler, an adjustable blade rod, an impeller mounting sliding sleeve, an impeller and a centralizing sleeve, the impeller is in key connection with the adjustable blade rod through the sliding sleeve, stepless adjustment of the height of the impeller is achieved through the adjusting bolt, and the requirements for different mud tank liquid level depths and turnover rates are met. The centralizing sleeve is composed of a fixing plate, a supporting sleeve and a replaceable rubber sleeve, swing of the blade rod is restrained through radial limiting, and the operation stability is improved. The stirrer overcomes the defects that an impeller of an existing stirrer is fixed and non-adjustable, the maintenance cost is high, and vibration of a long shaft is large, has the comprehensive advantages of being highly flexible in adaptation, rapid in modular maintenance and long in vibration suppression service life, and is suitable for optimization and upgrading of a drilling fluid solid phase control system.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling equipment technology, specifically an adjustable mud mixer. Background Technology

[0002] Drilling fluid agitators are crucial equipment for solids control in drilling fluids. Installed on the surface of the drilling fluid circulation tank, the impeller is inserted to a certain depth below the fluid surface, directly agitating the drilling fluid. Its main function is to continuously agitate drilling fluids formulated with powdered bentonite, barite powder, etc., ensuring uniform mixing, or to uniformly mix solid particles returning from the wellhead with the drilling fluid. Furthermore, the agitator prevents sedimentation in the drilling fluid, maintaining its stable properties and allowing desanders, desilters, centrifuges, and other equipment to achieve optimal solids removal effects, thus ensuring the safe and smooth progress of drilling operations.

[0003] Existing mud mixers have the following drawbacks:

[0004] First, the mixing shaft and impeller are fixedly welded together. The impeller cannot be moved up and down on the mixing shaft for adjustment. The height of the impeller cannot be adjusted according to the mixing requirements of different mud tanks. When replacing impellers of different diameters, the blades and mixing shaft need to be replaced as a whole. This results in poor adaptability and high replacement and maintenance costs.

[0005] Secondly, the existing stirring shaft is a cantilever structure with no support at the lower end. When the stirring shaft is particularly long and rotates, it will cause a large sway in the front section, resulting in poor structural stability. Utility Model Content

[0006] The purpose of this invention is to provide a mud mixer with adjustable impeller height, convenient maintenance, and stable operation, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adjustable mud mixer, comprising a base, a motor and a reducer fixedly mounted on the base, wherein the output shaft of the reducer is connected to an adjustable blade rod via a coupling, an impeller mounting sleeve is fitted on the adjustable blade rod, and the impeller mounting sleeve is connected to the impeller via a key; a straightening sleeve fixed to the bottom of the mud tank is also provided at the bottom of the adjustable blade rod.

[0008] The impeller mounting sleeve is provided with a keyway and is circumferentially fixed to the adjustable blade rod through a guide key; the impeller mounting sleeve is also provided with an adjusting bolt for adjusting the installation height of the impeller;

[0009] The impeller includes a blade connecting plate and a plurality of blades evenly welded to the blade connecting plate. The included angle between the blades and the blade connecting plate is 45°, and the blade connecting plate is fixed to the lower end of the impeller mounting sleeve by flange bolts.

[0010] The straightening sleeve includes a fixed plate, a support sleeve welded to the fixed plate, and a rubber sleeve fitted inside the support sleeve. The adjustable blade rod passes through the inside of the straightening sleeve and is radially limited by the rubber sleeve.

[0011] Preferably, the impeller mounting sleeve slides up and down via a guide key arranged along the axial direction of the adjustable blade, and the length of the guide key is adapted to the installation requirements of impellers of various sizes.

[0012] Preferably, the fixing plate of the straightening sleeve is welded to the bottom of the mud tank, the rubber sleeve is fitted with the adjustable blade rod with clearance, and the rubber sleeve can be replaced separately.

[0013] Preferably, the impeller is installed at a height of 3 / 4 of its diameter, and the height can be finely adjusted by adjusting bolts to adapt to different mud turnover rate requirements.

[0014] Preferably, the blades are evenly distributed in four groups along the circumference of the blade connecting plate, with each group spaced 90° apart.

[0015] The working process of this utility model is as follows:

[0016] Start-up and drive process: After the motor is powered on, the speed is reduced and the torque is increased through the reducer, which drives the coupling to rotate the adjustable blade rod. At this time, the impeller mounting sleeve fixed on the adjustable blade rod rotates synchronously with the shaft, thereby driving the four sets of 45° inclined blades on the impeller to rotate at high speed in the mud tank.

[0017] Mud mixing process: When the impeller rotates, the blades cut into the mud at a 45° angle, forming vortex and axial flow, which makes the solid particles in the mud evenly mixed, prevents sedimentation, and improves the solid separation efficiency of equipment such as sand removers and mud removers.

[0018] Height adjustment process: When it is necessary to adjust the installation height of the impeller to adapt to different liquid depths or mud turnover rates, the operator loosens the adjusting bolt on the sliding sleeve, slides the sliding sleeve up and down along the guide key on the adjustable blade to the target position, which is usually 3 / 4 of the impeller diameter. Then, the adjusting bolt and the anti-loosening nut are tightened to complete the height fixing.

[0019] The straightening and stabilization process: The adjustable blade rod is welded through the straightening sleeve at the bottom of the tank. The rubber sleeve inside the sleeve is fitted with the blade rod with a clearance. The elastic deformation of the rubber absorbs vibration, suppresses radial sway under long shaft conditions, and ensures the stability of the impeller rotation center.

[0020] Maintenance and Replacement Process: When the impeller needs to be replaced, simply remove the flange bolts connecting the impeller and the sliding sleeve, and move the sliding sleeve upwards along the guide key to a certain height, allowing the impeller to detach from the mud surface. This allows for quick disassembly. If the rubber sleeve of the centralizing sleeve needs to be replaced due to long-term wear, the old rubber sleeve can be directly removed and the new part installed without replacing the entire support structure.

[0021] The beneficial effects of this utility model are as follows:

[0022] (1) This utility model effectively absorbs the radial vibration generated when the adjustable blade rotates at high speed by means of the elastic buffering effect of the rubber sleeve in the straightening sleeve, thereby reducing mechanical wear and extending the service life of the blade, bearing and drive components.

[0023] (2) The combination design of the guide key and the sliding sleeve in this utility model supports quick replacement of impellers of different diameters. Combined with the height adjustment function, it can adapt to the different requirements of different compartments of the mud tank for the turnover rate, stirring intensity and liquid depth, and significantly improve the applicability of the equipment in multiple scenarios.

[0024] (3) In this utility model, the rubber sleeve and impeller of the straightening sleeve are both detachable independent structures. After wear, only a single part needs to be replaced. There is no need to disassemble the agitator as a whole or replace the main structure such as the support sleeve and fixing plate, which greatly reduces the cost of spare parts and maintenance time. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the stirrer;

[0026] Figure 2 This is a schematic diagram of impeller height adjustment;

[0027] Figure 3 This is a cross-sectional structural diagram of the straightening sleeve;

[0028] In the diagram: 1. Motor; 2. Reducer; 3. Base; 4. Coupling; 5. Adjustable blade; 6. Guide key; 6-1. Screw; 7. Impeller mounting sleeve; 7-1. Fixing bolt; 7-2. Adjusting bolt; 8. Impeller; 8-1. Blade connecting plate; 8-2. Blade; 9. Straightening sleeve; 9-1. Support sleeve; 9-2. Rubber sleeve; 9-3. Fixing plate. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] like Figure 1-3An adjustable mud mixer is shown, comprising a base 3, a motor 1 and a reducer 2 fixedly mounted on the base 3. The output shaft of the reducer 2 is connected to an adjustable blade rod 5 via a coupling 4. An impeller mounting sleeve 7 is fitted on the adjustable blade rod 5, and the impeller mounting sleeve 7 is connected to the impeller 8 via a key 6. A straightening sleeve 9 fixed to the bottom of the mud tank is also provided at the bottom of the adjustable blade rod 5. The impeller mounting sleeve 7 has a keyway and is circumferentially fixed to the adjustable blade rod 5 via a guide key 6. An adjusting bolt 7-2 is also provided on the impeller mounting sleeve 7 for adjusting the installation height of the impeller 8. The impeller 8 includes a blade connecting plate 8-1 and a plurality of blades 8-2 evenly welded to the blade connecting plate 8-1. The included angle between the blades 8-2 and the blade connecting plate 8-1 is 45°, and the blade connecting plate 8-1 is fixed to the lower end of the impeller mounting sleeve 7 by flange bolts.

[0031] The straightening sleeve 9 includes a fixed plate 9-3, a support sleeve 9-1 welded to the fixed plate 9-3, and a rubber sleeve 9-2 sleeved inside the support sleeve 9-1. The adjustable blade 5 passes through the inside of the straightening sleeve 9 and is radially limited by the rubber sleeve 9-2.

[0032] The impeller mounting sleeve 7 slides up and down via a guide key 6 arranged axially along the adjustable blade 5. The length of the guide key 6 is adaptable to the installation requirements of various sizes of impellers 8. The installation height of the impeller 8 is 3 / 4 of the impeller diameter, and the height can be finely adjusted via adjusting bolts 7-2 to accommodate different mud turnover rate requirements. The blades 8-2 are evenly distributed in four groups along the circumference of the blade connecting plate 8-1, with each group spaced 90° apart.

[0033] The fixing plate 9-3 of the straightening sleeve 9 is welded to the bottom of the mud tank. The rubber sleeve 9-2 is clearance-fitted with the adjustable blade 5, and the rubber sleeve 9-2 can be replaced separately.

[0034] The working process of this utility model is as follows:

[0035] Start-up and drive process: After the motor 1 is powered on, the speed is reduced and the torque is increased through the reducer 2, which drives the coupling 4 to rotate the adjustable blade rod 5. At this time, the impeller mounting sleeve 7 fixed on the adjustable blade rod 5 rotates synchronously with the shaft, thereby driving the four sets of 45° inclined blades 8-2 on the impeller 8 to rotate at high speed in the mud tank.

[0036] Mud mixing process: When impeller 8 rotates, blades 8-2 cut into the mud at a 45° angle, forming vortex and axial flow, so that the solid particles in the mud are evenly mixed, preventing sedimentation, and improving the solid separation efficiency of equipment such as sand remover and mud remover.

[0037] Height adjustment process: When it is necessary to adjust the installation height of the impeller 8 to adapt to different liquid depths or mud turnover rates, the operator loosens the adjusting bolt 7-2 on the sliding sleeve 7, slides the sliding sleeve 7 up and down along the guide key 6 on the adjustable blade 5 to the target position, which is usually 3 / 4 of the impeller diameter. Then, the adjusting bolt 7-2 and the anti-loosening nut are tightened to complete the height fixing.

[0038] The straightening and stabilization process: The adjustable blade 5 is welded through the straightening sleeve 9 at the bottom of the tank. The rubber sleeve 9-2 inside it is fitted with the blade with a clearance. The elastic deformation of the rubber absorbs vibration, suppresses radial sway under long shaft conditions, and ensures the stability of the impeller 8 rotation center.

[0039] Maintenance and Replacement Process: When impeller 8 needs to be replaced, simply remove the flange bolts connecting impeller 8 and sliding sleeve 7, and move sliding sleeve 7 upwards along guide key 6 to a certain height, so that impeller 8 is removed from the mud surface, and disassembly can be completed quickly. If the rubber sleeve 9-2 of the straightening sleeve 9 needs to be replaced due to long-term wear, the old rubber sleeve can be directly removed and the new part installed, without the need to replace the entire support structure.

[0040] This invention is applicable to fields such as oil drilling and geological exploration, significantly improving mud mixing efficiency and equipment adaptability while reducing maintenance costs.

[0041] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, based on the technical teachings provided by this utility model and as common knowledge in the mechanical field, other equivalent modifications and improvements can be made, and these should also be considered within the scope of protection of this utility model.

Claims

1. An adjustable mud mixer, characterized in that: include: The base (3), the motor (1) and the reducer (2) are fixedly installed on the base (3). The output shaft of the reducer (2) is connected to the adjustable blade rod (5) through the coupling (4). The adjustable blade rod (5) is fitted with an impeller mounting sleeve (7). The impeller mounting sleeve (7) is connected to the impeller (8) through the key (6). The bottom of the adjustable blade rod (5) is also provided with a straightening sleeve (9) fixed to the bottom of the mud tank. The impeller mounting sleeve (7) is provided with a keyway and is circumferentially fixed to the adjustable blade rod (5) through a guide key (6); the impeller mounting sleeve (7) is also provided with an adjusting bolt (7-2) for adjusting the installation height of the impeller (8); The impeller (8) includes a blade connecting plate (8-1) and a plurality of blades (8-2) evenly welded on the blade connecting plate (8-1). The blades (8-2) and the blade connecting plate (8-1) have an angle of 45°. The blade connecting plate (8-1) is fixed to the lower end of the impeller mounting sleeve (7) by flange bolts. The straightening sleeve (9) includes a fixed plate (9-3), a support sleeve (9-1) welded to the fixed plate (9-3), and a rubber sleeve (9-2) sleeved inside the support sleeve (9-1). The adjustable blade (5) passes through the inside of the straightening sleeve (9) and is radially limited by the rubber sleeve (9-2).

2. The adjustable mud mixer according to claim 1, characterized in that: The impeller mounting sleeve (7) slides up and down via a guide key (6) arranged along the axial direction of the adjustable blade (5). The length of the guide key (6) is adapted to the installation requirements of impellers (8) of various sizes.

3. An adjustable mud mixer according to claim 1 or 2, characterized in that: The fixing plate (9-3) of the straightening sleeve (9) is welded to the bottom of the mud tank. The rubber sleeve (9-2) is fitted with the adjustable blade (5) with clearance, and the rubber sleeve (9-2) can be replaced separately.

4. An adjustable mud mixer according to claim 3, characterized in that: The impeller (8) is installed at a height of 3 / 4 of its diameter, and its height can be finely adjusted by adjusting bolts (7-2) to adapt to different mud turnover rate requirements.

5. An adjustable mud mixer according to claim 4, characterized in that: The blades (8-2) are evenly distributed in four groups along the circumference of the blade connecting plate (8-1), with each group spaced 90° apart.

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