Static mixer

Abstract

The utility model belongs to the technical field of mixing equipment, and provides a static mixer which comprises a feeding pipe, a mixing pipe and a discharging pipe which are sequentially communicated, a spiral mixing device is arranged in the feeding pipe, a power paddle is rotatably arranged at the starting end of the mixing pipe, the mixing device is of a sectional structure, and the discharging pipe is arranged in the mixing pipe. A shearing stirrer is arranged in a spacing area between the adjacent sections of mixing devices, and a transmission mechanism is also arranged between the power paddle and the shearing stirrer. According to the utility model, the transmission mechanism is used for driving the shearing stirrer arranged between the mixing devices to rotate, so that the shearing blades can shear and stir materials in the vertical direction of normal rotary mixing of the materials, the dispersity of the low-fluidity materials is improved, the low-fluidity materials are more easily and uniformly mixed, and finally, the mixing effect of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing equipment, in particular to a static mixer. Background Art

[0002] A static mixer is a highly efficient mixing device without moving parts. Its basic working mechanism is to use a mixing unit fixed in the tube to change the flow state of the fluid in the tube, so as to achieve good dispersion and sufficient mixing between different fluids. The working principle of a static mixer is to allow the fluid to flow in the pipeline and impact various types of plate elements, increase the velocity gradient of the fluid laminar motion or form turbulence. In laminar flow, it is "division-position movement-re-convergence". In turbulent flow, in addition to the above three situations, the fluid will also produce violent eddies in the cross-sectional direction, and there is a strong shear force acting on the fluid, causing the fluid to further divide and mix, and finally mix to form the required emulsion. The reason why it is called a "static" mixer is that there are no moving parts in the pipeline, only static elements.

[0003] Current static mixers are very effective in mixing materials with high fluidity, but are not very effective in mixing materials with low fluidity and high viscosity. For example, the raw materials of various sealants usually need to be mixed before processing, but the silicone polymers, epoxy resins, polysiloxanes and other materials in these raw materials are all products with high viscosity and low fluidity. When using a conventional static mixer for mixing, only rotation mixing can be performed, and the lack of shear dispersion processing results in uneven and incomplete mixing between different materials. Therefore, a more suitable static mixer is needed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a static mixer, which solves the problem that the prior art products have poor effects when mixing substances with poor fluidity and strong viscosity.

[0005] According to an embodiment of the utility model, a static mixer comprises a feed pipe, a mixing pipe and a discharge pipe which are connected in sequence, a spiral mixing device is arranged inside the feed pipe, the mixing device is coaxially arranged with the mixing pipe, and the maximum diameter of the mixing device matches the inner diameter of the feed pipe, a power paddle is rotatably arranged at the starting end of the mixing pipe, the power paddle is a spiral blade structure coaxial with the mixing pipe, the mixing device is a segmented structure, and a spacing area is provided between the mixing devices of adjacent segments, a shearing agitator is provided in the spacing area, the shearing agitator comprises a rotating shaft and a plurality of shearing blades arranged on the rotating shaft, the rotating shaft is arranged perpendicularly and passes through the central axis of the mixing pipe, the shearing blades are perpendicularly connected to the rotating shaft, a transmission mechanism is also provided between the power paddle and the shearing agitator, the transmission mechanism transmits the rotational power of the power paddle to the shearing agitator, and drives the shearing agitator to rotate along the rotating shaft.

[0006] Furthermore, one end of the power propeller is connected to a transmission shaft, and a mounting bracket is also provided in the mixing tube, and the rotating shaft is rotatably connected to the mounting bracket.

[0007] Furthermore, the transmission mechanism includes a connecting shaft arranged parallel to the outside of the mixing tube, the connecting shaft is vertically connected to a support rod through a bevel gear, and the support rod is driven and connected to the transmission shaft through the bevel gear; the rotating shaft of the shear mixer passes through the mixing tube and extends to the outside, and is driven and connected to the connecting shaft through the bevel gears respectively.

[0008] Furthermore, a cover is provided outside the connecting shaft, so that the connecting shaft, the supporting rod and the rotating shaft are all enclosed inside.

[0009] Furthermore, a plurality of auxiliary blades are vertically arranged on the surface of the shearing blade, the auxiliary blades are parallel to the rotating shaft, and the auxiliary blades on adjacent shearing blades are staggered.

[0010] Furthermore, it also includes a return material mixing tube arranged in parallel with the mixing tube, wherein a continuous mixing device is arranged inside the return material mixing tube, one end of the return material mixing tube is connected to the end of the discharge pipe, and the other end is connected to the feed pipe, and a three-way valve is arranged at the connection between the return material mixing tube and the discharge pipe.

[0011] Furthermore, a plurality of annular pressure sensors are axially arranged on the inner wall of the discharge pipe, and the pressure sensors are electrically connected to the three-way valve.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a power paddle inside the mixing tube, and the power paddle is a spiral blade structure coaxial with the mixing tube. The material just entering the mixing tube from the feed tube drives the power paddle to rotate when flowing, so as to utilize the transmission mechanism to drive the shearing agitator arranged between the mixing devices to rotate. Since the shearing agitator includes a rotating shaft and shearing blades arranged on the rotating shaft, the shearing blades are parallel to the axial direction of the mixing tube, and the material inside the mixing tube rotates around the axial direction of the mixing tube along the mixing device, the shearing blades can perform shearing and stirring work in the vertical direction of the normal rotation and mixing of the material, thereby improving the dispersion of the low-fluidity material, making it easier to mix evenly, and finally improving the mixing effect of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0015] Figure 2 Schematic diagram of a shear mixer in an embodiment of the utility model.

[0016] In the above drawings: 1. feed pipe; 2. mixing pipe; 3. discharge pipe; 4. power paddle; 5. connecting shaft; 6. shearing agitator; 7. three-way valve; 8. return mixing pipe; 21. mixing device; 31. pressure sensor; 41. transmission shaft; 42. support rod; 61. rotating shaft; 62. shearing blade; 63. auxiliary blade. DETAILED DESCRIPTION

[0017] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, an embodiment of the utility model proposes a static mixer, comprising a feed pipe 1, a mixing pipe 2 and a discharge pipe 3 which are connected in sequence, and the three are coaxially connected pipeline structures, wherein the feed pipe 1 is connected to a raw material storage bin to inject a variety of materials to be mixed at the same time, and the discharge pipe 3 is connected to subsequent processing equipment.

[0019] In this embodiment, a spiral mixer 21 is provided inside the feed tube 1. The mixer 21 is coaxially arranged with the mixing tube 2, and the maximum diameter of the mixer 21 matches the inner diameter of the feed tube 1. Since the mixer 21 belongs to common technology, it will not be described here. A power paddle 4 is rotatably provided at the beginning of the mixing tube 2. The power paddle 4 is a spiral blade structure coaxial with the mixing tube 2. The mixer 21 is a segmented structure. There is a spacing area between the mixers 21 of adjacent sections. A shear mixer 6 is provided in the spacing area. The shear mixer 6 includes a rotating shaft 61 and a plurality of shear blades 62 arranged on the rotating shaft 61. The rotating shaft 61 is arranged vertically and passes through the central axis of the mixing tube 2. The shear blades 62 are vertically connected to the rotating shaft 61. A transmission mechanism is also provided between the power paddle 4 and the shear mixer 6. The transmission mechanism transmits the rotational power of the power paddle 4 to the shear mixer 6, driving the shear mixer 6 to rotate along the rotating shaft 61.

[0020] In a further solution, one end of the power paddle 4 is connected to a transmission shaft 41, and a mounting bracket is also provided in the mixing tube 2, and the rotating shaft is rotatably connected to the mounting bracket. Correspondingly, the transmission mechanism includes a connecting shaft 5 arranged in parallel on the outside of the mixing tube 2, and a support rod 42 is vertically connected to the connecting shaft 5 through a bevel gear, and the support rod 42 is connected to the transmission shaft 41 through a bevel gear drive connection; the rotating shaft 61 of the shearing agitator 6 passes through the mixing tube 2 and extends to the outside, and is connected to the connecting shaft 5 through a bevel gear drive connection. When the power paddle 4 rotates, it drives the transmission shaft 41 to rotate, and then transmits the rotational power to the support rod 42, the connecting shaft 5 and the rotating shaft 61 in sequence through the bevel gear connection, and finally drives the shearing agitator 6 to rotate to achieve the shearing function.

[0021] Preferably, a cover is provided outside the connecting shaft 5, so that the connecting shaft 5, the support rod 42 and the rotating shaft 61 are all enclosed inside, preventing external dust and impurities from adhering to the connecting shaft 5, the support rod 42 and other rotating parts to affect the rotation performance and reduce maintenance time.

[0022] like Figure 2 As shown, further preferably, a plurality of auxiliary blades 63 are vertically arranged on the surface of the shearing blade 62, the auxiliary blades 63 are parallel to the rotating shaft 61, and the auxiliary blades 63 on adjacent shearing blades 62 are staggered. By providing the auxiliary blades 63, the shearing range and the covering direction are expanded, so that shearing and stirring can be performed simultaneously on two mutually perpendicular surfaces, so that the mixing of the materials is more sufficient and thorough.

[0023] In this embodiment, a return material mixing tube 82 is also included, which is arranged in parallel with the mixing tube 2. A continuous mixing device 21 is arranged inside the return material mixing tube 82. One end of the return material mixing tube 82 is connected to the end of the discharge pipe 3, and the other end is connected to the feed pipe 1. A three-way valve 7 is arranged at the connection between the return material mixing tube 82 and the discharge pipe 3. Furthermore, four annular pressure sensors 31 are arranged axially on the inner wall of the discharge pipe 3, and the pressure sensors 31 are electrically connected to the three-way valve 7. When the material enters the discharge pipe 3 after being mixed in the mixing tube 2, it passes through multiple pressure sensors 31 in sequence. Because the material is in a rotating state, if it is not mixed evenly, the density at different positions will be different. Then, when rotating through different pressure sensors 31, the pressure applied to the inner wall of the pipe will be different. The mixing effect can be judged according to the difference in the values ​​detected by the pressure sensors 31. If the difference in the detected values ​​is large, the three-way valve 7 adjusts the material to enter the return mixing pipe 82 so that it repeats the mixing process until the desired effect is achieved; if the difference in the detected values ​​is small, it means that the mixing has reached the standard and the material is discharged from the discharge pipe 3.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A static mixer, characterized in that: It comprises a feed pipe, a mixing pipe and a discharge pipe which are connected in sequence, wherein a spiral mixing device is arranged inside the feed pipe, wherein the mixing device is coaxially arranged with the mixing pipe, and the maximum diameter of the mixing device matches the inner diameter of the feed pipe, and a power paddle is rotatably arranged at the starting end of the mixing pipe, wherein the power paddle is a spiral blade structure coaxial with the mixing pipe, and the mixing device is a segmented structure, wherein a spacing area is arranged between the mixing devices of adjacent segments, and a shearing agitator is arranged in the spacing area, wherein the shearing agitator comprises a rotating shaft and a plurality of shearing blades arranged on the rotating shaft, wherein the rotating shaft is arranged perpendicularly and passes through the central axis of the mixing pipe, and the shearing blades are perpendicularly connected to the rotating shaft, and a transmission mechanism is also arranged between the power paddle and the shearing agitator, wherein the transmission mechanism transmits the rotational power of the power paddle to the shearing agitator, and drives the shearing agitator to rotate along the rotating shaft.

2. A static mixer as claimed in claim 1, characterized in that: One end of the power propeller is connected to a transmission shaft, and a mounting bracket is also provided in the mixing tube, and the transmission shaft is rotatably connected to the mounting bracket.

3. A static mixer as claimed in claim 2, characterized in that: The transmission mechanism includes a connecting shaft arranged in parallel outside the mixing tube, the connecting shaft is vertically connected to a support rod through a bevel gear, and the support rod is driven and connected to the transmission shaft through the bevel gear; the rotating shaft of the shear mixer passes through the mixing tube and extends to the outside, and is driven and connected to the connecting shaft through the bevel gears respectively.

4. A static mixer as claimed in claim 3, characterized in that: A cover shell is arranged outside the connecting shaft, so that the connecting shaft, the supporting rod and the rotating shaft are all enclosed inside.

5. A static mixer as claimed in claim 1, characterized in that: A plurality of auxiliary blades are vertically arranged on the surface of the shearing blade. The auxiliary blades are parallel to the rotating shaft, and the auxiliary blades on adjacent shearing blades are staggered.

6. A static mixer as claimed in claim 1, characterized in that: It also includes a return material mixing tube arranged in parallel with the mixing tube, wherein a continuous mixing device is arranged inside the return material mixing tube, one end of the return material mixing tube is connected to the end of the discharge pipe, and the other end is connected to the feed pipe, and a three-way valve is arranged at the connection between the return material mixing tube and the discharge pipe.

7. A static mixer as claimed in claim 6, characterized in that: A plurality of annular pressure sensors are axially arranged on the inner wall of the discharge pipe, and the pressure sensors are electrically connected to the three-way valve.

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