A floating agitator

Abstract

The present invention provides a floating agitator, which relates to the technical field of agitators. The floating agitator comprises an agitator shaft, a shaft sleeve, a stirring blade, and a drive motor. The drive motor is connected to the agitator shaft, which is adapted to extend into a liquid to be stirred in a mixing tank. One end of the agitator shaft located in the liquid to be stirred is adapted to be connected to the stirring blade via the shaft sleeve to drive the stirring blade to stir. The shaft sleeve is a hollow structure. When the floating agitator is shut down, the shaft sleeve is adapted to drive the stirring blade to slide upward relative to the agitator shaft to above the liquid surface. In the floating agitator of the present invention, when in operation, the drive motor drives the shaft sleeve and the stirring blade to rotate via the agitator shaft to achieve stirring of a starch emulsion. When shut down, due to the hollow structure of the shaft sleeve, the shaft sleeve drives the stirring blade to float upward to above the liquid surface, preventing the blade from being buried in the starch and becoming unable to restart.

Description

Technical Field

[0001] The present invention relates to the technical field of agitators, in particular to a floating agitator. Background Art

[0002] During the starch production process, in order to prevent starch precipitation from clogging the storage tank or pipeline, the starch milk needs to be stirred. The stirring impeller of the existing stirring device is generally fixed on the stirring shaft. The stirring impeller is located below the liquid surface. The stirring shaft is driven to drive the stirring impeller to rotate to achieve uniform stirring. When the stirring device is stopped, the stirring impeller will be buried by the precipitated starch because it is below the liquid surface. If it is started again, a production accident will occur. Summary of the Invention

[0003] The present invention aims to provide a floating agitator to solve the technical problem that the existing starch stirring device cannot be restarted normally after being shut down.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A floating agitator comprises an agitator shaft, a shaft sleeve, a stirring blade and a drive motor. The drive motor is connected to the agitator shaft. The agitator shaft is suitable for extending into the liquid to be stirred in the stirring tank. The end of the agitator shaft located in the liquid to be stirred is suitable for being connected to the stirring blade through the shaft sleeve to drive the stirring blade to stir. The shaft sleeve is a hollow structure. When the floating agitator is stopped, the shaft sleeve is suitable for driving the stirring blade to slide upward relative to the agitator shaft to above the liquid surface.

[0006] The floating agitator of the present invention, when in operation, drives the shaft sleeve and the stirring blades to rotate in the liquid to be stirred via the stirring shaft by a driving motor, thereby stirring the starch emulsion. When the agitator is stopped, the shaft sleeve adopts a hollow structure. Under the action of buoyancy, the shaft sleeve drives the stirring blades to float upward along the stirring shaft to above the liquid surface, and the stirring blades will not be buried in the starch and unable to be restarted, thereby making it safer to use.

[0007] Optionally, the sleeve is provided with a first through hole along the axial direction, the stirring shaft is inserted into the first through hole and the stirring shaft is adapted to the first through hole, and when the stirring shaft rotates, the stirring shaft abuts against the inner wall of the first through hole to limit the rotation of the sleeve relative to the stirring shaft.

[0008] Optionally, the inner wall of the first through hole is provided with protrusions at intervals along the circumferential direction, and the stirring shaft is inserted into the first through hole and is suitable for abutting against the protrusions.

[0009] Optionally, the stirring shaft is a square shaft, and at least one side edge of the stirring shaft is located between two adjacent protrusions. When the stirring shaft rotates, the stirring shaft abuts against the protrusions to drive the shaft sleeve to rotate.

[0010] Optionally, there are four protrusions, four gaps are formed between the four protrusions, and the four side edges of the stirring shaft are respectively located in the four gaps.

[0011] Optionally, a second through hole arranged along the axial direction is formed between the protrusion and the shaft sleeve, and the protrusion and the shaft sleeve are integrally formed or detachably connected.

[0012] Optionally, the top wall of the sleeve extends circumferentially so that a portion of the top wall is projected onto the stirring blade.

[0013] Optionally, the bottom of the shaft sleeve extends downward so that the vertical dimension of the shaft sleeve is larger than the vertical dimension of the stirring blade.

[0014] Optionally, a side wall of the shaft sleeve is provided with an air leakage detection port, the air leakage detection port is communicated with the hollow chamber of the shaft sleeve, and the air leakage detection port is suitable for connecting to a pressure measuring device.

[0015] Optionally, the stirring shaft is adapted to be connected to the stirring tank via a base at an end away from the driving motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of a floating agitator according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the installation structure between the stirring shaft and the shaft sleeve according to an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the structure of a shaft sleeve according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1. Stirring shaft; 2. Drive motor; 3. Bushing; 31. Leakage detection port; 32. First through hole; 33. Protrusion; 34. Gap; 35. Second through hole; 4. Stirring blade; 5. Base; 6. Stirring tank. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be noted that the terminology in each embodiment, such as "upper", "lower", "front", "back" and other words indicating direction, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the referred elements and devices must be operated in accordance with the specific directions and defined operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0023] In addition, the terms "first" and "second" mentioned in the embodiments of the present invention are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, the terms "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] A coordinate system XYZ is set in this article, where the positive direction of the X axis represents the left direction, the negative direction of the X axis represents the right direction, the positive direction of the Y axis represents the front direction, the negative direction of the Y axis represents the back direction, the positive direction of the Z axis represents the top direction, and the negative direction of the Z axis represents the bottom direction.

[0025] like Figure 1 As shown, a floating agitator according to an embodiment of the present invention includes a stirring shaft 1, a sleeve 3, a stirring blade 4 and a drive motor 2. The drive motor 2 is connected to the stirring shaft 1. The stirring shaft 1 is suitable for extending into the stirring tank 6. The stirring shaft 1 is connected to the stirring blade 4 through the sleeve 3 at one end located in the stirring tank 6. The sleeve 3 is a hollow structure so that it can be floated by the liquid.

[0026] In this embodiment, the driving motor 2 is located outside the stirring tank 6, and the output end of the driving motor 2 is connected to the stirring shaft 1. The stirring shaft 1 is vertically inserted (inserted along the Z-axis direction) into the stirring tank 6. The stirring tank 6 is filled with starch milk. The stirring shaft 1 is equipped with a sleeve 3 on the end extending into the starch milk. The interior of the sleeve 3 is hollow. The sleeve 3 is generally made of iron material. In order to enable the sleeve 3 to be floated by water, the volume of the hollow chamber of the sleeve 3 can be designed to be large enough. The sleeve 3 is equipped with stirring blades 4 for stirring. The number of the stirring blades 4 can be set arbitrarily, and the size of the stirring blades 4 can be reasonably designed according to the size of the stirring tank 6.

[0027] For example, the shaft sleeve 3 is provided with four stirring blades 4 at even intervals around the circumference; the stirring blades 4 are tilted downward, and when working, the stirring shaft 1 drives the stirring blades 4 to rotate, and the downward tilted stirring blades 4 stir up the precipitated starch, resulting in a good stirring effect.

[0028] During operation, the drive motor 2 drives the stirring shaft 1 to rotate, which in turn drives the shaft sleeve 3 and stirring blades 4 to rotate in the starch milk. The stirring blades 4 are tilted downward and, during rotation, screw downward into the starch milk to gradually stir up the starch settled at the bottom of the stirring tank 6, thereby achieving uniform stirring of the starch milk. When the floating agitator is stopped, the shaft sleeve 3, due to its hollow structure, causes the stirring blades 4 to float upward along the stirring shaft 1 to above the liquid surface under the buoyancy of the water, preventing them from being buried in the starch. Because starch is sticky, if the stirring blades 4 sink to the bottom of the stirring tank 6, they will become stuck and unable to restart, shortening the service life of the floating agitator. When the floating agitator of this embodiment is stopped, the shaft sleeve 3 and the stirring blades 4 are suspended above the liquid surface under the buoyancy, avoiding the situation of being buried in starch as in the prior art. When restarted, they can operate normally, effectively avoiding production accidents caused by shutdown, making it safer to use and extending the service life.

[0029] Alternatively, as Figure 2-3 As shown, the sleeve 3 is provided with a first through hole 32 along the axial direction, the stirring shaft 1 is inserted into the first through hole 32 and the stirring shaft 1 is adapted to the first through hole 32. When the stirring shaft 1 rotates, the stirring shaft 1 abuts against the inner wall of the first through hole 32 to limit the rotation of the sleeve 3 relative to the stirring shaft 1.

[0030] In this embodiment, the sleeve 3 is provided with a first through hole 32 extending axially therethrough. The cross-section of the first through hole 32 can be circular, annular, or triangular. For example, the cross-section of the first through hole 32 is square, and the cross-section of the stirring shaft 1 is square. During operation, the stirring shaft 1 rotates, and at least a portion of the surface of the stirring shaft 1 abuts against the inner wall of the first through hole 32 to limit the circumferential rotation of the sleeve 3 relative to the stirring shaft 1, so that the sleeve 3 rotates with the rotation of the stirring shaft 1, thereby driving the stirring blades 4 to rotate and stir. When the floating agitator is shut down, that is, when the stirring shaft 1 stops rotating, the circumferential restriction between the sleeve 3 and the stirring shaft 1 is released, and the sleeve 3 can slide up and down relative to the stirring shaft 1 under the action of buoyancy.

[0031] Optionally, protrusions 33 are provided on the inner wall of the first through hole 32 at intervals along the circumferential direction, and the stirring shaft 1 is inserted into the first through hole 32 and is adapted to abut against the protrusions 33 .

[0032] In this embodiment, a protrusion 33 is formed on the inner wall of the first through hole 32 extending radially. There are multiple protrusions 33 and they are circumferentially spaced apart along the inner wall of the first through hole 32. The stirring shaft 1 is inserted into the first through hole 32. The stirring shaft 1 is in contact connection with the protrusions 33. When the floating agitator is working, the stirring shaft 1 rotates to abut against the protrusions 33 to drive the stirring blades 4 to rotate; when the agitator is stopped, the stirring shaft 1 is separated from the protrusions 33, and the sleeve 3 floats upward to the liquid surface under the buoyancy of the water.

[0033] Alternatively, as Figure 2 As shown, the stirring shaft 1 is a square shaft, and at least one side edge of the stirring shaft 1 is located between two adjacent protrusions 33. When the stirring shaft 1 rotates, the stirring shaft 1 abuts against the protrusions 33 to drive the shaft sleeve 3 to rotate.

[0034] In this embodiment, there are four protrusions 33, and four gaps 34 are formed between the four protrusions 33. The four side edges of the stirring shaft 1 are respectively located in the four gaps 34. When the floating agitator stops working, each side edge of the stirring shaft 1 is located between two adjacent gaps 34 and does not abut against the protrusions 33, so that the sleeve 3 can be floated; when the floating agitator is working, the stirring shaft 1 rotates so that each side edge thereof abuts against the corresponding protrusion 33, so as to push the sleeve 3 to rotate, and then drive the stirring blade 4 to rotate, so as to achieve stirring of the starch milk.

[0035] The stirring shaft 1 is not limited to a square shaft, and a stirring shaft 1 in a polygonal shape can also be used. The principle and function are similar to those of the square shaft, and will not be repeated here.

[0036] Optionally, a second through hole 35 arranged along the axial direction is formed between the protrusion 33 and the shaft sleeve 3, and the protrusion 33 and the shaft sleeve 3 are integrally formed or detachably connected.

[0037] In this embodiment, the provision of the second through hole 35 can, on the one hand, reduce the use of materials for forming the protrusion 33, and on the other hand, reduce the overall weight of the sleeve 3 and the protrusion 33, so that the overall structure composed of the sleeve 3, the protrusion 33 and the stirring blade 4 can float above the liquid surface together.

[0038] Optionally, the top wall of the shaft sleeve 3 extends in the circumferential direction so that a portion of the top wall is projected onto the stirring blade 4 .

[0039] In this embodiment, if Figure 1As shown, the top wall of the sleeve 3 extends circumferentially to form a T-shaped structure. The cross-section of the top wall of the sleeve 3 (the cross-section along the X-axis) is larger than the cross-section of other parts. This can increase the buoyancy of the sleeve 3 and ensure the welding strength of the root of the stirring blade 4. The stirring blade 4 is welded to the upper part of the sleeve 3 and slightly lower than the height of the top wall of the sleeve 3.

[0040] Optionally, the bottom of the shaft sleeve 3 extends downward, so that the vertical dimension of the shaft sleeve 3 is larger than the vertical dimension of the stirring blade 4 .

[0041] In this embodiment, the sleeve 3 is generally made of iron material, which has a high density and heavy weight and will sink to the bottom of the mixing tank 6. In order to increase the buoyancy of the sleeve 3 as much as possible so that the sleeve 3 can float smoothly when the floating agitator is not working, the sleeve 3 can be appropriately extended axially to a certain length. The extended length can be reasonably designed to increase the volume of the hollow chamber of the sleeve 3 to achieve the purpose of improving the buoyancy effect.

[0042] Optionally, a side wall of the shaft sleeve 3 is provided with an air leakage detection port 31 , the air leakage detection port 31 is communicated with the hollow chamber of the shaft sleeve 3 , and the air leakage detection port 31 is suitable for connecting to a pressure measuring device.

[0043] In this embodiment, in order to detect the sealing performance of the hollow chamber of the sleeve 3 and ensure that there is no air leakage, the air leakage detection port 31 is set at the lower part of the sleeve 3, and the hollow chamber of the sleeve 3 is pressurized through the air leakage detection port 31 to check for air leakage. If there is air leakage, water will enter the hollow chamber during use, affecting the buoyancy effect of the sleeve 3. When the vehicle is parked, the sleeve 3 may be buried. At this time, the sleeve 3 needs to be repaired by welding until the pressure of the hollow chamber is detected to meet the design requirements. This can ensure that when the vehicle is parked, the sleeve 3 together with the stirring blade 4 can be smoothly floated.

[0044] Optionally, the stirring shaft 1 is adapted to be connected to the stirring tank 6 via a base 5 at an end away from the driving motor 2 .

[0045] In this embodiment, a base 5 can be installed at the bottom of the stirring tank 6, and the lower end of the stirring shaft 1 is rotatably connected to the base 5. The floating agitator is installed and fixed through the base 5. The shape and structure of the base 5 are not limited, as long as it can play a fixing role here.

[0046] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A floating agitator, characterized in that: The invention comprises a stirring shaft (1), a shaft sleeve (3), a stirring blade (4) and a driving motor (2), wherein the driving motor (2) is connected to the stirring shaft (1), and the stirring shaft (1) is suitable for extending into the liquid to be stirred in the stirring tank (6); the end of the stirring shaft (1) located in the liquid to be stirred is suitable for being connected to the stirring blade (4) through the shaft sleeve (3) to drive the stirring blade (4) to stir; the shaft sleeve (3) is a hollow structure; when the floating agitator is stopped, the shaft sleeve (3) is suitable for driving the stirring blade (4) to slide upward relative to the stirring shaft (1) to above the liquid surface; The shaft sleeve (3) is provided with a first through hole (32) along the axial direction, the stirring shaft (1) is inserted into the first through hole (32) and the stirring shaft (1) is adapted to the first through hole (32). When the stirring shaft (1) rotates, the stirring shaft (1) abuts against the inner wall of the first through hole (32) to limit the rotation of the shaft sleeve (3) relative to the stirring shaft (1). The inner wall of the first through hole (32) is provided with protrusions (33) at intervals along the circumferential direction. The stirring shaft (1) is inserted into the first through hole (32) and is adapted to abut against the protrusions (33). The stirring shaft (1) adopts a polygonal column shape. At least one side edge of the stirring shaft (1) is located between two adjacent protrusions (33). When the stirring shaft (1) rotates, the stirring shaft (1) abuts against the protrusions (33) to drive the shaft sleeve (3) to rotate. The top wall of the shaft sleeve (3) extends in the circumferential direction so that a portion of the top wall is projected onto the stirring blade (4).

2. The floating agitator according to claim 1, characterized in that: The stirring shaft (1) is a square shaft.

3. The floating agitator according to claim 2, characterized in that: There are four protrusions (33), four gaps (34) are formed between the four protrusions (33), and the four side edges of the stirring shaft (1) are respectively located in the four gaps (34).

4. The floating agitator according to claim 1, characterized in that A second through hole (35) arranged along the axial direction is formed between the protrusion (33) and the shaft sleeve (3); the protrusion (33) and the shaft sleeve (3) are integrally formed or detachably connected.

5. The floating agitator according to claim 1, characterized in that: The bottom of the shaft sleeve (3) extends downward, so that the vertical dimension of the shaft sleeve (3) is larger than the vertical dimension of the stirring blade (4).

6. The floating agitator according to claim 1, characterized in that: The side wall of the shaft sleeve (3) is provided with an air leakage detection port (31), the air leakage detection port (31) is communicated with the hollow chamber of the shaft sleeve (3), and the air leakage detection port (31) is suitable for connecting to a pressure measuring device.

7. The floating agitator according to claim 1, characterized in that: The stirring shaft (1) is adapted to be connected to the stirring tank (6) via a base (5) at an end away from the driving motor (2).

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