Stirring structure with rotary guide cylinder and stirring equipment

Abstract

The utility model provides a stirring structure with a rotary guide cylinder and stirring equipment. The stirring structure comprises a stirring shaft, a supporting piece, the guide cylinder and a stirring paddle, the guide cylinder is connected to the stirring shaft through the supporting piece, so that the guide cylinder can rotate along with the stirring shaft, and the axial direction of the guide cylinder coincides with the axial direction of the stirring shaft. And the stirring paddle is connected to the stirring shaft and / or the guide cylinder.

Description

Technical Field

[0001] The present application relates to the technical field of stirring equipment, and particularly to a stirring structure with a rotating guide cylinder and a stirring equipment. Background Art

[0002] In the fields of industries such as chemical engineering and pharmaceuticals, some production processes have strict control requirements for the fluid flow pattern in the stirring reaction equipment. For example, it is necessary to limit the fluid flow route to make the fluid circulate up and down; it is necessary to obtain high-speed eddies and high-fold circulation; it is necessary to make the fluid flow through the heating surface at a high speed to facilitate heat transfer, etc. In the production processes including the above requirements, generally, the method of adding a guide cylinder is adopted to strengthen the fluid flow.

[0003] Such as Figure 1 、 Figure 2 and Figure 3 As shown, in the technology known to the applicant, the stirring equipment is provided with an independent stirrer and a guide cylinder. The stirring equipment may include a kettle body 11, a cylinder body 12, a rotating shaft 13 and a paddle 14. The cylinder body 12 can be fixedly connected to the kettle body 11 through a connecting member 121 to serve as a guide cylinder to strengthen the fluid flow in the kettle. Figure 1 In [reference], the connecting member 121 is arranged on the upper head (the top of the kettle body), and the cylinder body 12 is provided with a guide window. The fluid formed by stirring can perform forced circulation flow along the direction shown by the arrow in the figure, thereby strengthening the mixing and heat transfer effects of the fluid in the kettle. This structure loads all the forces on the cylinder body 12 onto the connecting member 121 at the top. Due to the turbulent impact of the fluid on the cylinder body 12, and the force arm of the connecting member 121 is relatively long, the formed moment is relatively large, and the connecting member 121 is prone to deformation or damage due to local stress. Figure 2 and Figure 3 Arrange the connecting member 121 in the middle and bottom of the kettle body 11. In these two structures, in addition to the large force on the connecting member 121, since the connecting member 121 is below the liquid level, it may affect the fluid flow field. At the same time, arranging the connecting member 121 below the liquid level will also cause a local low-speed area in the fluid flow field in the kettle and some materials are likely to scale at the connecting member.

[0004] CN208773844U discloses a guide cylinder mixer, which includes a tank body, a stirring shaft extending into the tank body, and a motor connected to the top of the tank body. The top of the tank body is provided with a feed inlet, the side of the tank body is provided with a personnel access port, and the bottom of the tank body is provided with a discharge outlet. The upper part of the stirring shaft is rotatably connected to the top of the tank body, and the upper end of the stirring shaft is connected with a pulley. The output end of the motor is connected to the pulley at the upper end of the stirring shaft by a transmission belt. The bottom in the tank body is connected with a guide cylinder, and the height of the guide cylinder and the distance between the lower edge of the guide cylinder and the bottom of the tank body are adjustable. The lower part of the stirring shaft is connected with stirring blades, and the stirring blades extend into the guide cylinder.

[0005] The draft tube mixer disclosed in the above-mentioned utility model patent still adopts a draft tube installation structure similar to that Figure 3 shown. It connects the draft tube to the bottom of the tank body, and there will still be a problem that the connecting piece bears a large force. At the same time, since the draft tube is relatively fixed, scaling will occur in the low-speed fluid area. Summary of the Utility Model

[0006] This application is made in view of the state of the above-mentioned prior art. The purpose of this application is to provide a stirring structure with a rotating draft tube, which connects the draft tube to the stirring shaft, and can effectively improve the scaling phenomenon of the draft tube.

[0007] This application also provides a stirring device including the above-mentioned stirring structure.

[0008] This application provides a stirring structure with a rotating draft tube, which includes a stirring shaft, a support member, a draft tube and a stirring paddle.

[0009] The draft tube is connected to the stirring shaft through the support member, so that the draft tube can rotate with the stirring shaft, and the axis of the draft tube coincides with the axis of the stirring shaft.

[0010] The stirring paddle is connected to the stirring shaft and / or the draft tube.

[0011] In at least one possible implementation manner, the stirring paddle includes outer barrel blades.

[0012] The outer barrel blades are connected to the outer side of the barrel wall of the draft tube; and / or

[0013] The stirring paddle includes inner barrel blades.

[0014] The inner barrel blades are connected to the inner side of the barrel wall of the draft tube.

[0015] In at least one possible implementation manner, the stirring structure with a rotating draft tube further includes a hub, the hub is connected to the stirring shaft, and the support member is connected to the outer peripheral part of the hub.

[0016] In at least one possible implementation manner, the support member includes a plurality of support rods, the axis of the support rods is perpendicular to the axis of the stirring shaft, the plurality of support rods are evenly distributed radially along the circumferential direction of the stirring shaft, and the outer ends of the support rods are connected to the draft tube.

[0017] In at least one possible implementation manner, the draft tube is provided with openings and windows, and on the circumferential surface of the draft tube, the area of the openings and windows is 10% to 60% of the circumferential surface area of the draft tube.

[0018] In at least one possible embodiment, the stirring paddle includes the outer-barrel paddle and the inner-barrel paddle,

[0019] the number of the outer-barrel paddles and the number of the inner-barrel paddles are the same; and / or

[0020] at least one of the outer-barrel paddles and at least one of the inner-barrel paddles are disposed at the same height of the draft tube.

[0021] In at least one possible embodiment, the stirring shaft extends into the interior of the draft tube, and stirring paddles are arranged on the stirring shaft.

[0022] The present application also provides a stirring device, which includes a stirring kettle and the aforementioned stirring structure with a rotating draft tube,

[0023] the stirring shaft is connected to the top of the stirring kettle,

[0024] the stirring shaft extends outside the stirring kettle to connect to a motor,

[0025] the support, the draft tube and the stirring paddle are arranged inside the stirring kettle.

[0026] In at least one possible embodiment, the diameter of the stirring kettle is D, and the diameter of the draft tube is d,

[0027] satisfying: 0.3D ≤ d ≤ 0.8D;

[0028] the distance from the upper end of the draft tube to the material surface in the stirring kettle is S1,

[0029] satisfying: 0.1D ≤ S1 ≤ 1D;

[0030] the distance from the lower end of the draft tube to the bottom of the stirring kettle is S2,

[0031] satisfying: 0.1D ≤ S2 ≤ 0.5D.

[0032] In at least one possible embodiment, the stirring shaft and / or the support are arranged above the material surface in the stirring kettle.

[0033] The stirring structure with a rotating draft tube and the stirring device provided by the present application connect the draft tube to the stirring shaft, so that the draft tube rotates together with the stirring shaft, replacing the connection mode in the prior art of fixedly connecting the draft tube to the kettle body. This technical solution can reduce or improve the deformation and damage of the draft tube connection structure caused by long-term local stress compared with the prior art, and the rotation of the draft tube can also effectively reduce the fouling phenomenon of the draft tube. Description of the Drawings

[0034] Figure 1A schematic structural diagram of a draft tube structure known to the applicant.

[0035] Figure 2 A schematic structural diagram of another draft tube structure known to the applicant.

[0036] Figure 3 A schematic structural diagram of yet another draft tube structure known to the applicant.

[0037] Figure 4 A schematic structural diagram of a stirring structure and a stirring device with a rotating draft tube according to an embodiment of the present application.

[0038] Explanation of reference numerals

[0039] 11 Kettle body

[0040] 12 Cylinder

[0041] 121 Connecting piece

[0042] 13 Rotating shaft

[0043] 14 Blade

[0044] 21 Stirring kettle

[0045] 22 Stirring shaft

[0046] 23 Support

[0047] 24 Draft tube

[0048] 25 Stirring paddle

[0049] 251 Blade outside the cylinder

[0050] 252 Blade inside the cylinder

[0051] 26 Hub Detailed implementation manners

[0052] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not used to exhaust all feasible ways of the present application, nor to limit the scope of the present application.

[0053] The embodiments of the present application provide a stirring structure with a rotating draft tube (hereinafter, sometimes simply referred to as "stirring structure"), as Figure 4 shown, the stirring structure may include a stirring shaft 22, a support 23, a draft tube 24, and a stirring paddle 25. The stirring structure may be disposed in a stirring kettle 21 for stirring and mixing liquid materials or powdered materials in the stirring kettle.

[0054] Specifically, the stirring shaft 22 can be connected to the support member 23, and the support member 23 can be disposed at a position between the middle and the lower end of the stirring shaft 22. The support member 23 can include a plurality of support rods, and the plurality of support rods can be evenly distributed radially along the circumferential direction of the stirring shaft 22, that is, the axial directions of the plurality of support rods can be perpendicular to the axial direction of the stirring shaft 22 respectively. The support member 23 can also be a circular support member with openings or windows, and the radial direction of the circular support member can be perpendicular to the axial direction of the stirring shaft 22.

[0055] Further, the stirring structure can further include a hub 26, and the hub 26 can be connected to the stirring shaft 22. The support member 23 can be connected to the outer peripheral part of the hub 26, that is, the support member 23 can be indirectly connected to the stirring shaft 22 through the hub 26. The hub 26 can be a hollow hub, the hollow hub can be sleeved on the stirring shaft 22, and the hub 26 can rotate together with the stirring shaft 22.

[0056] The draft tube 24 can be connected to the support member 23. In particular, the draft tube 24 can be connected to the outer end or the outer peripheral part of the support member 23, so that the draft tube 24 can rotate with the stirring shaft 22. The axial direction of the draft tube 24 can coincide with the axial direction of the stirring shaft 22. It can be understood that the rotation of the draft tube 24 with the stirring shaft 22 can reduce or avoid the scaling phenomenon caused by the draft tube 24 being partially located in the low flow rate area.

[0057] Optionally, the support member 23 can be made of materials such as round bars, hollow tubes, and section steels.

[0058] The stirring paddle 25 can be disposed on the barrel wall of the draft tube 24. Further, the stirring paddle 25 can include an outer barrel blade 251 and / or an inner barrel blade 252. The outer barrel blade 251 can be connected to the outer side of the barrel wall of the draft tube 24 and extend radially outward along the draft tube 24.

[0059] In a non-limiting example, the draft tube 24 can include one or more vertically arranged strengthening columns, and the stirring paddle 25 can be connected to the strengthening column.

[0060] The inner barrel blade 252 can be connected to the inner side of the barrel wall of the draft tube 24 and extend radially inward along the draft tube 24. It can be understood that the outer barrel blade 251 can enhance the fluid flow between the draft tube 251 and the stirring kettle 21, especially enhance the axial circulation of the fluid inside the stirring kettle, and improve the stirring and mixing efficiency of the stirring structure for the materials.

[0061] Preferably, the number of the outer barrel blades 251 and the number of the inner barrel blades 252 can be the same.

[0062] Preferably, the installation positions (heights) of the outer barrel blade 251 and the inner barrel blade 252 can correspond to each other, that is, at least one outer barrel blade 251 and at least one inner barrel blade 252 can be arranged at the same height of the draft tube 24.

[0063] Optionally, the stirring paddle 25 can be connected to the draft tube 24 by welding or detachable connection. The detachable connection method can include bolt and nut connection, etc.

[0064] Optionally, the draft tube 24 can also be provided with openings, windows, etc. according to actual process requirements. When the draft tube 24 is provided with openings and windows, the area of the openings and windows on the circumferential surface of the draft tube 24 can be 10% to 60% of the area of the draft tube 24 (that is, the circumferential surface area of the draft tube when no openings and windows are provided).

[0065] Of course, the draft tube 24 can also not be provided with openings and windows.

[0066] Optionally, the type of the stirring paddle 25 (including the outer paddle blades 251 and the inner paddle blades 252) can be straight blade type, bent type, curved surface type, combined type, etc. The blade shape of the stirring paddle 25 (including the outer paddle blades 251 and the inner paddle blades 252) can be rectangular, trapezoidal, quasi-circular, etc.

[0067] Optionally, the number of the stirring paddles 25 can be two or more. The number of layers of the stirring paddles 25 (taking the stirring paddles at the same height in the draft tube as one layer) can be one layer or multiple layers.

[0068] Optionally, the stirring shaft 22 can extend into the interior of the draft tube 24, that is, the support member 23 can be connected to the middle of the stirring shaft 22. The stirring shaft 22 can also be connected with a stirring paddle to cooperate with the stirring paddle 25 connected to the draft tube 24 to mix and stir the material.

[0069] The embodiment of the present application also provides a stirring device, which can include the aforementioned stirring structure with a rotating draft tube and a stirring kettle 21. The stirring structure can be at least partially arranged in the stirring kettle 21. The stirring shaft 22 can be connected to the top of the stirring kettle 21. The stirring shaft 22 can extend outside the stirring kettle 21 to connect to a motor, while the support member 23, the draft tube 24, the stirring paddle 25 and the hub 26 can be arranged inside the stirring kettle 21.

[0070] In another example, the stirring shaft can also be supported by the stirring kettle 21 at its lower part to improve the structural stability of the stirring shaft. For example, a bottom bearing can be arranged at the bottom of the stirring kettle 21 to support the lower part of the stirring shaft.

[0071] Preferably, as Figure 4As shown, the diameter of the stirring kettle 21 is D, the diameter of the draft tube 24 is d, and d satisfies 0.3D ≤ d ≤ 0.8D. The distance from the upper end of the draft tube 24 to the liquid level (material surface) is S1, and S1 satisfies 0.1D ≤ S1 ≤ 1D. The distance from the lower end of the draft tube 24 to the bottom of the stirring kettle 21 is S2, and S2 satisfies 0.1D ≤ S2 ≤ 0.5D. The upper and lower ends of the draft tube 24 are separated from the stirring kettle 21 to facilitate the movement of the material from inside the draft tube 24 to outside the draft tube 24, or from outside the draft tube 24 to inside the draft tube 24, so as to promote the achievement of the stirring effect.

[0072] Preferably, the stirring shaft 22 and / or the support member 23 can be arranged above the material surface in the stirring kettle 21 to reduce or avoid the scaling phenomenon of the stirring shaft 22 and / or the support member 23.

[0073] The following briefly describes some beneficial effects of the above embodiments of the present application.

[0074] The stirring structure and stirring equipment with a rotating draft tube provided by the embodiments of the present application connect the draft tube to the stirring shaft, so that the draft tube can rotate together with the stirring shaft. Compared with the prior art in which the draft tube is fixedly installed, the scaling phenomenon of the draft tube can be effectively reduced by the rotation of the draft tube. At the same time, stirring paddles can be arranged on the inner side and / or the outer side of the tube wall of the draft tube to meet various process requirements for different types of fluids, and improve the mixing and stirring efficiency of the stirring equipment for the material.

[0075] It can be understood that in the present application, when the number of components or members is not specifically limited, the number can be one or more, and here the plurality means two or more. For the case where the number of components or members shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., this specific number is usually exemplary rather than restrictive, and it can be understood as a plurality, that is, two or more. However, this does not mean that the present application excludes the case of one.

[0076] It should be understood that the above embodiments are only exemplary and do not limit the present application. Those skilled in the art can make various modifications and changes to the above embodiments under the teaching of the present application without departing from the scope of the present application.

Claims

1. A stirring structure with a rotating draft tube, characterized in that, It includes a stirring shaft, a support member, a draft tube and stirring paddles. The draft tube is connected to the stirring shaft through the support member so that the draft tube can rotate with the stirring shaft, and the axis of the draft tube coincides with the axis of the stirring shaft. The stirring paddles are connected to the stirring shaft and / or the draft tube. The stirring paddles are connected to the draft tube by welding or detachable connection. The stirring paddles include outer-tube blades. The outer-tube blades are connected to the outer side of the wall of the draft tube and extend radially outward along the draft tube; and The stirring paddles include inner-tube blades. The inner-tube blades are connected to the inner side of the wall of the draft tube and extend radially inward along the draft tube. The number of the outer-tube blades is the same as that of the inner-tube blades. At least one of the outer-tube blades and at least one of the inner-tube blades are arranged at the same height of the draft tube.

2. The stirring structure with a rotating draft tube according to claim 1, wherein, It further includes a hub which is connected to the stirring shaft, and the support member is connected to the outer peripheral part of the hub.

3. The stirring structure with a rotating draft tube according to claim 1, characterized in that The support member includes a plurality of support rods, the axes of the support rods are perpendicular to the axis of the stirring shaft, the plurality of support rods are evenly distributed radially along the circumferential direction of the stirring shaft, and the outer ends of the support rods are connected to the draft tube.

4. The stirring structure with a rotating draft tube according to claim 1, wherein The draft tube is provided with openings and windows, and on the circumferential surface of the draft tube, the area of the openings and windows is 10% to 60% of the circumferential surface area of the draft tube.

5. The stirring structure with a rotating draft tube according to claim 1, characterized in that, The stirring shaft extends into the interior of the draft tube, and stirring paddles are arranged on the stirring shaft.

6. A stirring device, characterized in that, It includes a stirring kettle and the stirring structure with a rotating draft tube according to any one of claims 1 to 5. The stirring shaft is connected to the top of the stirring kettle. The stirring shaft extends outside the stirring kettle to connect to a motor. The support member, the draft tube and the stirring paddles are arranged inside the stirring kettle.

7. The stirring device according to claim 6, wherein The diameter of the stirring kettle is D, and the diameter of the draft tube is d. Satisfy: 0.3D ≤ d ≤ 0.8D; The distance from the upper end of the draft tube to the material surface inside the stirring kettle is S1. Satisfy: 0.1D ≤ S1 ≤ 1D; The distance from the lower end of the draft tube to the bottom of the stirring kettle is S2. Satisfy: 0.1D ≤ S2 ≤ 0.5D.

8. The stirring device according to claim 6, characterized in that The stirring shaft and / or the support member are arranged above the material surface inside the stirring kettle.

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