CN108479592B - A self-rotating ventilation stirring device - Google Patents

Abstract

The invention discloses an autorotation type ventilation stirring device in the field of fluid medium mixing stirring.A primary stirring mechanism consists of a five-way body and four rotating blades, a secondary stirring mechanism consists of a six-way body and four rotating blades, four side surfaces of the five-way body are respectively connected and communicated with the inner end of one rotating blade, and the bottom surface of the five-way body is communicated with the top surface of the six-way body; the four side surfaces of the six-way body are respectively connected and communicated with the inner end of one rotating blade, the bottom surface of the six-way body is communicated with a secondary connecting pipe, and pressure gas enters from a central through hole below the secondary connecting pipe; each rotating blade is a hollow pipe fitting which is horizontally and radially arranged, the middle section is a straight pipe section, and the outer end of each rotating blade is a straight elbow which is straightly bent towards a rotating direction; a plurality of first exhaust hole groups are arranged on the end surface of the straight elbow of each four rotating blades, and a plurality of second exhaust hole groups are arranged on the semi-circular arc surface of the middle section of the straight pipe section, which is at the same side as the end surface of the straight elbow; the pressure gas in the pipe is directly utilized to drive the stirring device to mix and stir, and the stirring device has the dual advantages of ventilation stirring and mechanical stirring.

Description

A self-rotating ventilation stirring device

technical field

The invention belongs to various material stirring technologies, and is especially suitable for the field of fluid medium mixing and stirring, and relates to a ventilation stirring device, which is especially suitable for gas-liquid two-phase mixing, gas-liquid-solid three-phase mixing and gas process of absorption reaction.

Background technique

Stirring can make two or more different substances disperse in each other, accelerate the process of heat transfer and mass transfer, so as to achieve the purpose of uniform mixing. Therefore, as a technological process, stirring is not only widely used in the chemical industry, but also widely used in biology, medicine, food, fiber, paper, petroleum, water treatment and other industries. Among them, the stirring device is the core component in the stirring process, and its performance directly affects the stirring effect and the quality of the next step.

In industry, stirring can be divided into mechanical stirring and airflow stirring. Compared with mechanical stirring, airflow stirring mainly uses gas bubbling to stir the substances that need to be uniformly mixed, or uses the airflow rising process to stir the mixed substances. However, airflow agitation not only has weak effect and long stirring time, but also is difficult to adapt to the mixing operation of high-concentration fluids and solid substances. In addition, when corrosive and toxic substances are mixed, airflow agitation is easy to pollute the environment. Therefore, in industrial production, substances are mixed and stirred. Mechanical stirring is often used. However, mechanical stirring has problems such as high investment cost, difficult maintenance, easy vibration, and blind mixing. With the in-depth research on gas dispersion, solid suspension and other processes and the vigorous development of polymerization reaction engineering and biochemical engineering, the requirements for uniform stirring of gas-liquid two-phase and gas-liquid-solid three-phase mixing in bioengineering aerobic cell culture and other processes It is also getting higher and higher, especially in the fields of biology, food, medical engineering and other fields that require full mixing of air and culture medium to promote oxygen dissolution, stirring technology that meets the requirements is more needed. However, no matter whether it is airflow stirring or mechanical stirring, it is difficult for a single stirring method to meet the specific process. The combination of the two stirring methods can not only achieve uniform stirring of the material, but also achieve a higher dissolved oxygen rate.

The stirring shaft disclosed in the Chinese patent publication number CN206368153U, titled "A stirring shaft for a fermenter" adopts three stirring components, which are beneficial to the uniform stirring of the fermentation liquid, but its structure and function are single, in order to realize the oxygen For the complete dissolution, not only a separate gas delivery part is required, but also a drive motor for the stirring shaft is required. The Chinese Patent Publication No. CN106396754A, titled "Fermentation equipment with an improved stirring and aeration device and its use method" discloses a stirring shaft, a stirring part for a decomposed layer, a stirring part for a fermentation layer, and a stirring part for the preheating layer, etc., By improving the stirring and ventilation structure of the fermentation equipment, the stirring and ventilation are more sufficient, so that a better fermentation effect can be achieved. However, its structure is relatively fixed, and it is difficult to be assembled according to the height of the tank, which is not flexible. Moreover, the rotation of the stirring shaft still needs to be driven by an external motor, which not only increases equipment investment, but also makes equipment maintenance difficult.

SUMMARY OF THE INVENTION

In order to overcome the defects of the existing stirring device, such as fixed structure, single function, and the need to set a power source separately, the present invention provides a multi-adaptive self-rotating aeration agitator that does not require motor drive and combines aeration agitation and mechanical agitation into one device.

In order to achieve the above purpose, the technical scheme adopted by a self-rotating ventilation stirring device of the present invention is: it has a primary stirring mechanism and a secondary stirring mechanism, the primary stirring mechanism is composed of a five-way body and four rotating blades, and the secondary stirring mechanism is composed of four rotating blades. The six-way body is composed of four rotating blades. The inside of the five-way body and the six-way body are cavities. The four sides of the five-way body are connected and communicated with the inner end of a rotating blade. The two rotating components are connected and communicated with the top surface of the six-way body; the four sides of the six-way body are each connected and communicated with the inner end of a rotating blade, and the bottom surface is connected through the third rotating component and the secondary connecting pipe and is connected to the secondary connecting pipe, and the pressure gas flows from The central through hole at the bottom of the secondary connecting pipe enters; each rotating blade is a hollow pipe piece arranged horizontally and radially, the middle section is a straight pipe section, and the outer end is a straight elbow bent in a direction of rotation; each four A plurality of first exhaust hole groups are opened on the end face of the straight elbow of the rotating blade, and a plurality of second exhaust hole groups are opened on the semicircular arc surface on the same side of the straight pipe section of the middle section and the end face of the straight elbow.

Further, the second exhaust hole group is composed of 2-4 exhaust holes up and down, and the first exhaust hole group is composed of 7-9 exhaust holes uniformly distributed in the circumferential direction.

Furthermore, the diameter of each row of the exhaust holes in the second exhaust hole group 18 increases sequentially from the inside to the outside, and the upper and lower spacings of the two adjacent rows of the exhaust holes increase from the inside to the outside.

After the present invention adopts the above-mentioned technical scheme, the beneficial effects it has are:

(1) The present invention can directly use the pressure gas in the pipe to drive the stirring device for mixing and stirring, which combines the characteristics of airflow type stirring and mechanical stirring, and has the dual advantages of ventilation stirring and mechanical stirring, which not only reduces equipment investment, but also improves. The compact structure also has the advantages of energy saving and environmental protection.

(2) The stirring mechanism, the rotating assembly and the stirring blade of the present invention are all assembled structures, which can adopt a large number of standard components and can be disassembled, which makes disassembly, cleaning and maintenance simple and convenient. It is worth noting that the present invention also has the characteristics of arbitrary assembly, and can change the size of the stirring device and increase the number of stirring mechanisms according to the needs of the working conditions to increase the number of stages of the stirring layer, and perform prefabricated connection and multi-stage stirring. Thus, the device has greater flexibility and versatility.

(3) The present invention can adapt to different types and uses of mixing and stirring processes, not only for gas-liquid two-phase reactions, but also for gas-liquid-solid three-phase reactions and other forms of stirring processes.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

Fig. 1 is the three-dimensional structure diagram of a kind of self-rotating ventilation stirring device of the present invention;

2 is a cross-sectional view of the front structure of a self-rotating ventilation stirring device of the present invention;

FIG. 3 is an enlarged cross-sectional view of the structure of the rotating assembly in FIG. 1;

FIG. 4 is an enlarged view of the front structure of a single rotating blade in FIG. 1;

FIG. 5 is an enlarged view of the partial structure of the second exhaust hole group in FIG. 4;

In the figure: 1. Five-way body; 2. The first rotating blade; 3. The second rotating blade; 4. The third rotating blade; 5. The fourth rotating blade; 6. The first exhaust hole group; 7. Bearing end cover ; 8. Bearing; 9. Transition joint; 10. Single wire male thread joint; 11. Double-ended straight joint; 12. First-level connecting pipe; 13. Six-way body; 14. Fifth rotating blade; ; 16. The seventh rotary blade; 17. The eighth rotary blade; 18. The second exhaust hole group; 19. The secondary connecting pipe; 101. The primary stirring mechanism; assembly; 104. secondary stirring mechanism; 105. third rotating assembly.

Detailed ways

Referring to FIG. 1 to FIG. 2 , the present invention includes a first-level stirring mechanism 101 , a first rotating assembly 102 , a first-level connecting pipe 12 , a second rotating assembly 103 , a second-level stirring mechanism 104 , and a third rotating assembly 105 from top to bottom. , Secondary connecting pipe 19 . All connecting pipes, rotating components, and stirring mechanisms have the same central axis and pass through them internally.

The first-stage stirring mechanism 101 is composed of four rotating blades of the five-way body 1 . The four rotating vanes are all hollow short pipe fittings, namely the first rotating vane 2 , the second rotating vane 3 , the third rotating vane 4 and the fourth rotating vane 5 . The five-way body 1 is a square structure with a cavity inside, four sides and a bottom surface are respectively machined with through holes, the diameters of the through holes on the four sides are the same, and each side is fixed and sealed through the through holes and communicates with a rotating The four rotating blades 2, 3, 4, and 5 all communicate with the inner cavity of the five-way body 1. Each connection part is sealed to form the primary stirring mechanism 101 . The four rotating blades 2, 3, 4, and 5 have the same structure and are evenly arranged along the circumferential direction. The corresponding connection between the four rotating blades 2, 3, 4, 5 and the through holes of the five-way body 1 is an inner end with an inner thread. The middle sections of the four rotating blades 2, 3, 4, and 5 are straight pipe sections, and the outer ends are straight elbows. Rotary vane assembly.

A plurality of first exhaust hole groups 6 are opened on the end face of the straight elbow at the outer end of each of the four rotating vanes 2, 3, 4, 5, and the middle section of each rotating vane 2, 3, 4, 5 is straight There are a plurality of second exhaust hole groups 18 on the semi-circular arc surface on the same side as the end face of the straight elbow on the pipe section. The first exhaust hole group 6 on the end face of the straight elbow of the rotating blade is composed of 7-9 exhaust holes, and the 7-9 exhaust holes are uniformly distributed in the circumferential direction.

The bottom surface of the five-way body 1 is fixedly and sealedly connected through its through hole and communicates with the upper end of the first rotating assembly 102. The lower end of the first rotating assembly 102 is connected to the upper end of the second rotating assembly 103 through the primary connecting pipe 12. The second rotating assembly 103 The lower end is connected to and communicated with the secondary stirring mechanism 104 .

The structure of the secondary stirring mechanism 104 is composed of a six-way body 13 and four rotating blades. The structure of the six-way body 13 is similar to that of the five-way body 1, and the difference from the five-way body 1 is that each side of the six-way body 13 is machined with a through hole, and the top surface of the six-way body 13 is connected to the lower end of the second rotating assembly 103 through the through hole. and connected. The four rotating blades of the secondary stirring mechanism 104 are the fifth rotating blade 14 , the sixth rotating blade 15 , the seventh rotating blade 16 and the eighth rotating blade 17 , and the structure of the four rotating blades in the primary stirring mechanism 101 It is exactly the same as the arrangement. The first exhaust hole group 6 and the second exhaust hole group 18 provided on the four rotating blades in the secondary stirring mechanism 104 are the same as the exhaust holes on the four rotating blades in the primary stirring mechanism 101. The hole groups are also exactly the same. The bottom surface of the six-way body 13 is sealed and connected to the upper end of the third rotating assembly 105 through its through hole, and the lower end of the third rotating assembly 105 is sealed and connected to the upper end of the secondary connecting pipe 19 , and the gas enters from the lower end of the secondary connecting pipe 19 .

Referring to FIG. 2 and FIG. 3 , the structures of the first rotating assembly 102 , the second rotating assembly 103 , and the third rotating assembly 105 are completely the same. Taking the first rotating assembly 102 as an example, it consists of a bearing end cover 7 , a bearing 8 , a transition joint 9 , a single-wire male screw joint 10 and a double-ended straight joint 11 . In the middle of the single-wire male screw joint 10 is a central through hole that penetrates up and down, the upper end of which is fixedly connected to the through hole on the bottom surface of the five-way body 1 through external threads. The outer fixed sleeve of the middle section of the single wire male thread joint 10 is fixed with the bearing 8, which is fixed with the inner ring of the bearing 8. The outer ring of the bearing 8 is fixed with the upper end of the transition joint 9, and the transition joint 9 serves as the bearing seat of the bearing 8. At the same time, the upper section of the transition joint 9 is fixedly connected to the bearing end cover 7 through internal and external screws. The opening of the bearing end cover 7 faces downward, and the inner side has an inner thread, which is connected with the outer thread of the transition joint 9. The end cover of the bearing end cover 7 is provided with a through hole, and the single-wire male thread joint 10 passes upward through the end of the bearing end cover 7. through holes in the cover. The lower end of the transition joint 9 is fixedly connected to the lower end of the double-ended straight-through joint 11 through internal and external threads, and the lower end of the double-ended straight-through joint 11 is fixedly connected to the upper end of the primary connecting pipe 12 . Both the transition joint 9 and the double-ended straight-through joint 1 are provided with a central hole that penetrates up and down, and the central holes of the transitional joint 9 and the double-ended straight-through joint 1 communicate with each other. When the single wire male threaded joint 10 is rotated, the bearing end cap 7, the transition joint 9 and the double-ended straight joint 11 all remain stationary. The joints of the bearing end cover 7 , the bearing 8 , the transition joint 9 , the single-wire male screw joint 10 and the double-ended straight-through joint 11 are sealed to form the first rotating assembly 102 .

Referring to Figure 4 and Figure 5, the present invention has a total of eight identical rotating blades, the second exhaust hole group 18 on the straight pipe section of the middle section of each rotating blade, along the horizontal radial direction, the hole diameter of each row of exhaust holes Increasing sequentially from the inside to the outside, D _k+1 =(1+0.04)D _k , D _k and D _k+1 respectively represent the k-th inside and the k+1-th vent on the adjacent outside. diameter. The horizontal distance between the two adjacent exhaust holes inside and outside is the same, and both are d. The ratio of the horizontal distance d to the inner cavity diameter B of the rotating blade is in the range of 0.2-0.3, that is, d/B=0.2-0.3. The ratio of the diameter D ₁ of the innermost exhaust hole to the diameter B of the inner cavity of the rotating blade is in the range of 0.15-0.2, that is, D ₁ /B=0.15-0.2. There is a pressure differential when the gas is vented from the second vent set 18 .

The second exhaust hole group 18 has 2-4 rows of exhaust holes at the top and bottom, and the upper and lower spacings of the two adjacent rows of exhaust holes increase sequentially from the inside to the outside, that is, H _k+1 =(1+0.04) H _k , H _k is the upper and lower spacing of the k-th adjacent two rows of exhaust holes, and H _k+1 is the upper and lower spacing of the k+1-th adjacent two rows of exhaust holes. The ratio of the upper and lower spacing H ₁ of the two innermost adjacent rows of exhaust holes to the inner cavity diameter B of the rotating blade is in the range of 0.2-0.25, that is, H ₁ /B=0.2-0.25.

The first exhaust hole group 6 on the end face of the straight elbow of the rotating blade has 7-9, and the diameter of each exhaust hole is the same, which is C, and the ratio of the hole diameter to the inner cavity diameter B of the rotating blade is in the range of 0.25-0.3 , namely C/B=0.25-0.3.

The straight bends at the outer ends of the eight rotating blades of the present invention are all straightly bent clockwise or counterclockwise, that is, in the form of fan blades. The ratio of the rotating diameter E of the eight rotating blades to the total height F of the device of the present invention is in the range of 0.4-0.5, that is, E/F=0.4-0.5. The total height F of the device of the present invention is the distance between the upper end face of the five-way body 1 and the lower end face of the secondary connecting pipe 19 . The ratio of the inner cavity diameter B of the rotating blade to the rotating diameter E of the rotating blade is in the range of 0.1-0.15, that is, B/E=0.1-0.15. The rotation diameter E of the rotating blade is the radial distance from the central axis of the device of the present invention to the outermost end of the rotating blade.

As shown in FIGS. 1-5 , when the present invention works, the pressurized gas enters from the lower central through hole of the secondary connecting pipe 19 , and then the pressurized gas passes upward through the double-ended straight-through joint 11 and the transition joint 9 in the third rotating assembly 105 in sequence. and the monofilament male threaded joint 10, thereby entering the secondary stirring mechanism 104. A part of the gas enters the fifth rotating blade 14 , the sixth rotating blade 15 , the seventh rotating blade 16 and the eighth rotating blade 17 through the four side through holes of the six-way body 13 of the secondary stirring mechanism 104 It is ejected from the second exhaust hole group 18 of the two rotating blades. Another part of the gas flows upward from the upper through hole of the six-way body 13, and then passes through the single-wire male thread joint 10, the transition joint 9 and the double-ended straight-through joint 11 in the second rotating assembly 103, and then passes through the primary connecting pipe 12, and then It also passes through the double-ended straight-through joint 11 , the transition joint 9 and the monofilament male screw joint 10 in the first rotating assembly 102 , thereby entering the primary stirring mechanism 101 . The residual pressure gas enters the first rotary vane 2, the second rotary vane 3, the third rotary vane 4 and the fourth rotary vane 5 respectively through the four side through holes of the five-way body 1, and then flows from the first row of the four rotary vanes. It is ejected from the air hole group 6 .

When the pressurized gas enters from the lower through hole of the secondary connection pipe 19, the secondary connection pipe 19 remains fixed. When the pressurized gas is ejected from the second exhaust hole group 18 on the secondary stirring mechanism 104 and the first exhaust hole group 6 on the primary stirring mechanism 101, due to the thrust of the gas, a The opposite force pushes the secondary stirring mechanism 104 and the primary stirring mechanism 101 to rotate clockwise or counterclockwise. Since the single-wire male threaded joint 10 in the third rotating assembly 105 is connected with the six-way body 13 through threads, and the single-wire male threaded joint 10 is in an interference fit with the inner ring of the bearing 8, the single-wire male threaded joint 10 in the third rotating assembly 105 has an interference fit. The wire male screw joint 10 and the inner ring of the bearing 8 move together with the secondary stirring mechanism 104 . In addition, in the third rotating assembly 105, the outer ring of the bearing 8 is in an interference fit with the transition joint 9, the bearing end cover 7 is threadedly connected with the transition joint 9, and the transition joint 9 is threadedly connected with the double-ended straight joint 11, and the double-ended straight The joint 11 is in turn screwed to the secondary connecting pipe 19 . Therefore, in the third rotating assembly 105, except for the monofilament male threaded joint 10, which moves together with the inner ring of the bearing 8 and the secondary stirring mechanism 104, other components are kept fixed. Since the structures of the first rotating assembly 102 , the second rotating assembly 103 and the third rotating assembly 105 are completely the same, the monofilament male screw joint 10 and the inner ring of the bearing 8 in the second rotating assembly 103 move together with the secondary stirring mechanism 104 . The monofilament male screw joint 10 and the inner ring of the bearing 8 in the first rotating assembly 102 move together with the primary stirring mechanism 101 . However, other components among the second rotating assembly 103 and the first rotating assembly 102 remain fixed. The primary connecting pipe 12 is threadedly connected with the double-ended straight joint 11 among the first rotating assembly 102 and the second rotating assembly 103 , so that the primary connecting pipe 12 is also kept fixed.

When the pressurized gas is ejected from the exhaust hole, the liquid can be stirred by the upward airflow, so as to realize the airflow stirring. In addition, the pressure gas will also drive the stirring device of the present invention to rotate, so as to realize mechanical stirring by the rotation of the stirring device, and finally achieve the purpose of combining airflow stirring and mechanical stirring, which not only reduces equipment investment, but also The compactness of the structure is improved.

Claims (8)

1. An auto-rotating formula agitating unit that ventilates, characterized by: the stirring device is provided with a first-stage stirring mechanism (101) and a second-stage stirring mechanism (104), wherein the first-stage stirring mechanism (101) consists of a five-way body (1) and four rotating blades, the second-stage stirring mechanism (104) consists of a six-way body (13) and four rotating blades, cavities are formed in the five-way body (1) and the six-way body (13), four side surfaces of the five-way body (1) are respectively connected and communicated with the inner end of one rotating blade, and the bottom surface of the five-way body (1) is connected and communicated with the top surface of the six-way body (13) through a first rotating assembly (102), a first-stage connecting pipe (12) and a second rotating assembly (; the four side surfaces of the six-way body (13) are respectively connected and communicated with the inner end of one rotating blade, the bottom surface of the six-way body is connected and communicated with the second-stage connecting pipe (19) through a third rotating assembly (105) and the second-stage connecting pipe (19), and pressure gas enters from a central through hole below the second-stage connecting pipe (19); each rotating blade is a hollow pipe fitting which is horizontally and radially arranged, the middle section is a straight pipe section, and the outer end of each rotating blade is a straight elbow which is straightly bent towards a rotating direction; a plurality of first exhaust hole groups (6) are arranged on the end surface of the straight elbow of each four rotating blades, and a plurality of second exhaust hole groups (18) are arranged on the semi-circular arc surface of the middle section of the straight pipe section on the same side with the end surface of the straight elbow;

the structure of the first rotating component (102), the structure of the second rotating component (103) and the structure of the third rotating component (105) are completely the same, taking the first rotating component (102) as an example, the first rotating component (102) consists of a bearing end cover (7), a bearing (8), a transition joint (9), a monofilament external thread joint (10) and a double-head straight-through joint (11), a central through hole which is through up and down is arranged in the middle of the monofilament external thread joint (10), the upper end of the monofilament external thread joint is fixedly connected with a through hole on the bottom surface of the five-way body (1) through an external thread, a bearing (8) is fixedly sleeved outside the middle section of the monofilament external thread joint (10) and is fixed with the inner ring of the bearing (8), the outer ring of the bearing (8) is fixed with the upper end of the transition joint (9), the upper section of the transition joint (9) is fixedly connected with the bearing end cover (7) through the internal thread and, the end cover of the bearing end cover (7) is provided with a through hole, the monofilament external thread joint (10) upwards penetrates through the through hole in the end cover of the bearing end cover (7), the lower end of the transition joint (9) is fixedly connected with the lower end of the double-head straight joint (11) through internal and external threads, and the lower end of the double-head straight joint (11) is fixedly connected with the upper end of the first-stage connecting pipe (12).

2. An autorotative aeration blending device according to claim 1 further comprising: the second exhaust hole group (18) is composed of an upper 2-4 rows of exhaust holes, and the first exhaust hole group (6) is composed of 7-9 exhaust holes which are uniformly distributed along the circumferential direction.

3. An autorotative aeration blending device according to claim 2 further comprising: the aperture of each row of exhaust holes in the second exhaust hole group (18) is sequentially increased from inside to outside, and the upper and lower distances between two adjacent rows of exhaust holes are sequentially increased from inside to outside.

4. An autorotative aeration blending device according to claim 3 wherein: diameter D of the (k + 1) th exhaust hole in the second exhaust hole group (18)_k+1=(1+0.04)D_k，D_kIs the diameter of the adjacent k-th vent hole inside the k + 1-th vent hole.

5. An autorotative aeration blending device according to claim 4 further comprising: the up-down distance H of the k +1 th two adjacent rows of exhaust holes of the second exhaust hole group (18)_k+1=(1+0.04) H_k，H_kIs the up-down distance of the k-th adjacent two rows of exhaust holes.

6. An autorotative aeration blending device according to claim 3 wherein: the ratio of the up-down distance of two adjacent rows of exhaust holes at the innermost side of the second exhaust hole group (18) to the diameter of the inner cavity of the rotating blade is in the range of 0.2-0.25.

7. An autorotative aeration blending device according to claim 1 further comprising: the ratio of the aperture of each exhaust hole of the first exhaust hole group (6) to the diameter of the inner cavity of the rotating blade is in the range of 0.25-0.3.

8. An autorotative aeration blending device according to claim 1 further comprising: the ratio of the rotating diameter of each rotating blade to the distance from the upper end surface of the five-way body (1) to the lower end surface of the secondary connecting pipe (19) is within the range of 0.4-0.5.

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