CN209917662U

CN209917662U - Stirrer of large milk storage tank

Info

Publication number: CN209917662U
Application number: CN201920318096.4U
Authority: CN
Inventors: 廖长保; 乌江雨; 尹婧; 曲珊珊; 皮冰冰
Original assignee: Heilongjiang Red Stars Group Food Co Ltd
Current assignee: Heilongjiang Red Stars Group Food Co Ltd
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-01-10
Anticipated expiration: 2029-03-14

Abstract

The utility model provides a large-scale milk storage tank agitator, include: the rotating wheel is of a turbine blade structure and is arranged in the central area of the bottom inside the milk storage tank, the motor is arranged outside the milk storage tank, the rotating shaft is connected with the rotating wheel and extends from the bottom of the large milk storage tank to the outside, and the motor drives the rotating wheel to rotate to work by transmitting power to the rotating shaft; the stirrer for the large milk storage tank adopts the larger stirrer rotating wheel, so that the rotating speed of the rotating wheel is obviously reduced compared with the prior art, the structure of the rotating wheel is optimized, the convection circulation of the emulsion in the large milk storage tank and the rotation of the rotating wheel are synchronously carried out at the same speed, and the problems that the emulsion is locally stirred too violently and forms stronger turbulent flow to influence the quality of the emulsion due to the relatively higher rotating speed of the rotating wheel in the prior art are solved.

Description

Stirrer of large milk storage tank

Technical Field

The utility model relates to a stirrer, in particular to a stirrer of a large milk storage tank.

Background

In the field of dairy processing, both raw and whole untreated milk are temporarily stored in large vertical milk storage tanks, which must be provided with a stirring device to prevent the cream from separating from the milk due to gravity and affecting the processing quality of subsequent products, and the stirring device must operate very stably during operation, so that excessively violent stirring will cause air and fat globules in the milk to break, thus leading free fat to be decomposed under the action of lipolytic enzyme of the milk, and reducing the quality of the raw milk. At present, a large milk storage tank and a stirrer widely used by dairy processing enterprises are shown in fig. 1, wherein the stirrer is a small-volume propeller-type rotating wheel 10 and is installed at a certain side position of the bottom of the large milk storage tank, and the working principle of the stirrer is that the rotation of the small rotating wheel drives the emulsion in the large milk storage tank to generate convection circulation, so that the overall operation is stable. However, since the volume of the large vertical milk storage tank is usually very large, the volume of the large tank body can reach 50,000-100,000 liters, and since the small-volume propeller rotors 10 used are relatively small, the propeller rotors 10 have a relatively large rotating speed if the small rotors drive the emulsion in the large tank body to generate a convection state with a certain flow velocity, and the rotating speed of the stirrer propeller rotors 10 will cause the emulsion in a certain area range W around the propeller rotors 10 to stir too violently and form a large local turbulent flow, so that the free fat in the local area is decomposed, and the quality of the raw milk is reduced to a certain extent. Therefore, improving the stirring structure of large vertical milk storage tanks to further reduce the adverse effect on quality during the storage of raw milk and whole milk has become a necessary practical topic in the field of dairy processing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a large-scale milk storage tank agitator solves the local turbulent problem in the large-scale milk storage tank further improves the storage quality of emulsion.

A large milk storage tank agitator comprising: the rotating wheel 1, the rotating shaft 2 and the motor 3; the rotating wheel 1 is of a turbine blade structure and is arranged in the central area of the bottom inside the milk storage tank 10, the motor 3 is arranged outside the milk storage tank 10, the rotating shaft 2 is connected with the rotating wheel 1 and extends to the outside from the bottom of the large milk storage tank 10, and the motor 3 drives the rotating wheel 1 to rotate by transmitting power to the rotating shaft 2.

The overall outline L of the turbine blade of the runner 1 is a curved shape capable of flexibly stirring the milk, the curved shape may be a circular shape, an oval shape or other curved shapes with flexible stirring characteristics, preferably a spiral shape as shown in fig. 3, and the spiral shape outline can ensure that the continuous and gradual disturbance can be performed on the milk with different radial distances in the milk storage tank 10 when the runner 2 rotates, so that the uniform radial disturbance of the milk can be ensured, and the local turbulence can be avoided from being generated to affect the quality of the milk; the number of the turbine blades on each runner 1 is preferably 6-20, and the turbine blades maintain a certain twisting elevation angle D, and the twisting elevation angle D is preferably 30-42 degrees.

Further, in order to enable the emulsion in the milk storage tank 10 to form a certain effective convection in the radial direction of the bottom of the runner 1, the runner 1 is preferably installed in the central area of the bottom of the milk storage tank 10 at an angle C of 6-15 ° with respect to the horizontal plane, and at the same time, a distance flow channel a is maintained between the section of the long diameter of the profile of the runner 1 and the inner wall of the milk storage tank 10, so that the emulsion can form a vertical return channel along the wall of the milk storage tank 10 in the milk storage tank 10, and a liquid flow circulation state is formed as shown in fig. 2.

The utility model has the advantages that: the stirrer for the large milk storage tank is provided, the rotating speed of the rotating wheel is obviously reduced compared with the prior art by adopting a larger stirrer rotating wheel, the structure of the rotating wheel is optimized, the convection circulation of the milk in the large milk storage tank and the rotation of the rotating wheel can be synchronously carried out at the same speed, and the problems that the milk storage quality is influenced because the local stirring of the milk is too violent and stronger turbulent flow is formed due to the relatively higher rotating speed of the rotating wheel in the prior art are solved.

Drawings

FIG. 1 is a schematic view of a large milk container and a blender in the prior art.

FIG. 2 is a schematic view of a large milk storage tank stirrer and an application state thereof.

FIG. 3 is a top view of a turbine blade structure rotor.

Fig. 4 and fig. 3 are sectional views in the direction B-B.

Detailed Description

The technical solution of the ball protection of the present invention will be further described with reference to the accompanying drawings and specific embodiments.

A large milk storage tank agitator comprising: the device comprises a turbine type rotating wheel 1 with a spiral outline shape, a rotating shaft 2 and a motor 3; the rotating wheel 1 is arranged in the central area of the bottom inside the milk storage tank 10, the motor 3 is arranged outside the milk storage tank 10, the rotating shaft 2 is connected with the rotating wheel 1 and extends from the bottom of the large milk storage tank 10 to the outside, and the motor 3 drives the rotating wheel 1 to rotate by transmitting power to the rotating shaft 2; the turbine type runner 1 with the spiral outline shape is composed of 20 turbine blades, the torsion elevation angle D of each turbine blade is 36 degrees, and a certain angle C formed by the installation of the runner 1 and the horizontal plane is 8 degrees.

In the working state of the large milk storage tank stirrer, the rotating wheel 1 rotates along the direction shown in fig. 3, as the rotating wheel 1 rotates along the direction, the turbine blades on the rotating wheel 1 enable the milk in the milk storage tank 10 to be sequentially stirred from the short-diameter turbine blades to the long-diameter turbine blades in the radial direction, and due to the curve characteristic of gradual expansion of the circumference of the spiral line, uniform, continuous and gradual transition of the radial disturbance of the milk can be ensured, and the generation of local turbulence is avoided; meanwhile, the rotating speed of the rotating wheel 1 is greatly reduced due to the adoption of the turbine type large rotating wheel, and under a normal working state, the rotating speed of the rotating wheel 1 is usually only 1/10-1/6 of the rotating speed of the small-sized propeller rotating wheel, so that the problem that the local turbulence of the small-sized propeller rotating wheel in the prior art is generated can be fundamentally solved, and the storage quality of the emulsion is ensured.

Further, in the operation state of the large milk storage tank stirrer, as the runner 1 continues to rotate, the turbine blades on the runner 1 push the milk in the vertical cylindrical region at the upper part of the runner 1 to rise at a constant speed, and the upper liquid flow flows to the side wall of the milk storage tank 10 and flows along the side wall liquid flow channel a of the milk storage tank 10 to the bottom of the milk storage tank 10, so that a stable double-ring convection circulation as shown in fig. 2 is formed in the milk storage tank 10, and the technical requirement of milk storage is well met; on this basis, the rotating wheel 1 is installed at the bottom of the milk storage tank 10 at a certain angle C with the horizontal plane, so that a small lifting speed difference is generated in the emulsion in the vertical columnar area at the upper part of the rotating wheel 1, and the lifting speed difference can generate a radial pressure difference in the emulsion at the bottom of the rotating wheel 1, so that the emulsion at the bottom of the rotating wheel 1 is more sufficiently convected, and the double-ring convection circulation of the emulsion in the milk storage tank 10 is more stable, smooth and sufficient; the angle C is selected according to the capacity, height and inner diameter of the milk container 10, and the structure and dimensions of the runner 1, and is preferably 8 ° in this embodiment.

Claims

1. A large milk storage tank agitator comprising: the rotating wheel (1), the rotating shaft (2) and the motor (3); the method is characterized in that: the rotating wheel (1) is of a turbine blade structure and is arranged in the central area of the bottom inside the milk storage tank (10), the motor (3) is arranged outside the milk storage tank (10), the rotating shaft (2) is connected with the rotating wheel (1) and extends from the bottom of the large milk storage tank (10) to the outside, and the motor (3) drives the rotating wheel (1) to rotate to work by transmitting power to the rotating shaft (2);

the overall outline L of the turbine blades of the runner (1) is a curved shape capable of flexibly stirring the emulsion, the curved shape is a circular shape, an oval shape or a curved shape with flexible stirring characteristics, a certain number of turbine blades are arranged on the runner (1), and the turbine blades keep a torsion elevation angle D.

2. The large milk storage tank agitator of claim 1, wherein: the overall outline L of the turbine blade of the runner (1) is in a spiral shape.

3. A large milk storage tank stirrer according to claim 2, characterized in that: the number of the turbine blades on the rotating wheel (1) is 6-20, and the twisting elevation angle D of the turbine blades is 30-42 degrees.

4. A large milk storage tank stirrer according to claim 3, characterized in that: the number of the turbine blades on the runner (1) is 20, and the twisting elevation angle D of the turbine blades is 36 degrees.

5. A large milk storage tank stirrer according to any one of claims 1 to 4, characterized in that: the rotating wheel (1) and the horizontal plane form a certain angle C which is 6-15 degrees and is arranged in the center area of the bottom of the milk storage tank (10).

6. The large milk storage tank agitator of claim 5, wherein: the rotating wheel (1) and the horizontal plane form a certain angle C of 8 degrees.