Static mixing device for polyvinyl acetate

Abstract

The utility model provides a static polyvinyl acetate mixing device, which relates to the technical field of static mixing devices and comprises a mixing pipe, mixing blades are arranged in the mixing pipe, one end of the mixing pipe is communicated with a feeding flange plate through a front pipe, and the other end of the mixing pipe is provided with a discharging flange plate. The mixing blades are arranged at the end, close to the discharging flange plate, in the mixing pipe, mixing cones and mixing fans are arranged at the front end and the rear end of the interior of the front pipe correspondingly, the mixing cones are of a conical structure, the two mixing cones are symmetrically arranged, the end faces of the two mixing cones are assembled and connected, drainage grooves are formed in the outer walls of the mixing cones, and the drainage grooves are communicated with the front pipe. The multiple drainage grooves are spirally formed, and the mixing fan is rotationally arranged on the inner wall, close to one end of the mixing pipe, of the front pipe. According to the utility model, the mixing blade, the mixing cone and the mixing fan are matched, and the mixing quality of materials is improved through different mixing modes.

Description

Technical Field

[0001] The utility model relates to the technical field of static mixing devices, in particular to a polyvinyl acetate static mixing device. Background Art

[0002] Static mixer is a kind of high-efficiency mixing equipment without moving parts. Its basic working mechanism is to use the 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. There are many kinds of static mixers currently used in industry, but the most widely used and representative ones are Venice type in the United States, Sulz SMV type, SMX type, SMXL type in Switzerland, Toray Hi and Ross-ISG type in Japan. Domestic static mixers mainly include SV, SX, SL, SK and SH. Due to differences in internal technical structures, the principles of various types of static mixers are different, and the mixing characteristics vary greatly.

[0003] However, in the prior art, the mixing of polyvinyl acetate and alkali methanol solution has developed from the original stirring mixing technology to the static mixing technology with more obvious energy-saving advantages. However, since polyvinyl acetate itself is a high molecular polymer with a relatively high viscosity, while the viscosity of the alkali methanol solution is relatively low, the viscosity difference between the two is relatively large, which easily causes the two to be uneven when mixed. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that a simple mixing device easily causes uneven mixing due to different viscosities of the mixtures.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a polyvinyl acetate static mixing device, comprising a mixing tube, a mixing blade is arranged in the mixing tube, one end of the mixing tube is connected to a feed flange through a front tube, and a discharge flange is arranged at the other end of the mixing tube. The mixing blade is arranged at one end of the mixing tube close to the discharge flange, and a mixing cone and a mixing fan are respectively arranged at the front and rear ends inside the front tube. The mixing cone is arranged in a conical structure, and there are two mixing cones and they are symmetrically arranged. The two mixing cone end faces are assembled and connected, and the outer wall of the mixing cone is provided with a drainage groove, and the drainage groove is spirally arranged and provided with a plurality of them. The mixing fan is rotatably arranged on the inner wall of the front tube close to one end of the mixing tube.

[0006] Preferably, the tips of the two mixing cones are arranged opposite to each other and fixedly connected, the wider ends of the two mixing cones are fixedly assembled and connected to the inner wall of the front tube, the diameter of the drainage groove is one fifth of the diameter of the front tube, and by assembling and connecting the two tips of the mixing cones, a certain space is created between the two mixing cones for the materials to be mixed in the space between the two mixing cones.

[0007] Preferably, the mixing fans are provided with two and are symmetrically arranged on the inner wall of the front tube, the side walls of the mixing fans are provided with fan blades, and the fan blades on the two mixing fans are staggered. By setting the two rotating fan blades, when the material passes through the mixing fan, the flow of the material drives the mixing fan to rotate, thereby achieving better mixing of the material.

[0008] Preferably, one end of the mixing tube and one end of the front tube are respectively provided with a positioning flange, and the two positioning flanges are assembled and connected by bolts, and the two positioning flanges are assembled and connected by a sealing gasket. By installing the end faces of the mixing tube and the front tube through the positioning flanges, the front tube and the mixing tube can be disassembled during cleaning, which facilitates the separate cleaning of the front tube and the mixing tube, making cleaning more convenient and avoiding the occurrence of material residue.

[0009] Preferably, a fixed tube is provided on the side wall of the front tube, and a rotating shaft is slidably provided at the center position of the mixing fan, and both ends of the rotating shaft extend into the two fixed tubes respectively. A sealing cover is threadedly connected to the outer wall of the fixed tube, and a bearing rotatably connected to the end face of the rotating shaft is provided in the sealing cover. When the mixing fan is disassembled, the sealing covers at both ends can be disassembled by threading. At this time, the bearings on the sealing covers are separated from the end face of the rotating shaft, and then the rotating shaft is separated from the mixing fan, and the rotating shaft is taken out of the fixed tube. At this time, the mixing fan loses its limit and can be directly separated from the front tube, which is convenient for disassembly, and the opposite is true during installation.

[0010] Preferably, the outer wall of the rotating shaft is provided with a limit groove, and the inner wall of the mixing fan is provided with a limit bar which is slidably engaged with the limit groove. The mutual engagement of the limit groove and the limit bar facilitates the limit linkage between the rotating shaft and the mixing fan.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] The utility model introduces the material from the feed flange, the material first enters the front pipe, the material flows in from the drainage groove on the outer wall of the mixing cone, and passes through the two mixing cones in sequence. When the material passes between the two mixing cones, the material is mixed for the first time, and the drainage groove is spirally arranged, which can guide the material to different positions to achieve a rapid mixing effect. The mixed material after passing through the mixing cone passes through a mixing fan, wherein the mixing fan is rotatably connected to the front pipe. When the material passes through the mixing fan, the flow of the material drives the mixing fan to rotate, which can achieve secondary large-scale mixing of the material. The material after the secondary mixing is almost mixed, and the material flows out from the front pipe and enters the mixing tube, and the final mixing is achieved through the mixing blades in the mixing tube, thereby achieving the purpose of better mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1A three-dimensional diagram of a polyvinyl acetate static mixing device provided by the utility model;

[0014] Figure 2 A schematic diagram of the internal structure of a front tube of a polyvinyl acetate static mixing device provided by the utility model;

[0015] Figure 3 A schematic diagram of a mixing fan of a polyvinyl acetate static mixing device provided by the utility model;

[0016] Figure 4 A schematic diagram of the disassembly of a fixed tube and a sealing cover of a polyvinyl acetate static mixing device provided by the utility model;

[0017] Figure 5 The utility model provides a mixing tube schematic diagram of a polyvinyl acetate static mixing device.

[0018] Legend:

[0019] 1. Mixing tube; 2. Mixing blades; 3. Front tube; 4. Discharge flange; 5. Inlet flange; 6. Mixing cone; 7. Mixing fan; 8. Drainage trough; 9. Fan blades; 10. Positioning flange; 11. Bolts; 12. Sealing gasket; 13. Fixed tube; 14. Rotating shaft; 15. Sealing cover; 16. Limiting groove; 17. Limiting strip. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides a technical solution: a polyvinyl acetate static mixing device, comprising a mixing tube 1, a mixing blade 2 is arranged in the mixing tube 1, one end of the mixing tube 1 is connected through a front tube 3 and is provided with a feed flange 5, the other end of the mixing tube 1 is provided with a discharge flange 4, the mixing blade 2 is arranged in the mixing tube 1 at one end close to the discharge flange 4, a mixing cone 6 and a mixing fan 7 are respectively arranged at the front and rear ends inside the front tube 3, the mixing cone 6 is arranged in a conical structure, two mixing cones 6 are provided and are symmetrically arranged, the two mixing cones 6 end faces are assembled and connected, the outer wall of the mixing cone 6 is provided with a drainage groove 8, the drainage groove 8 is spirally arranged and is provided with a plurality of them, and the mixing fan 7 is rotatably arranged on the inner wall of the front tube 3 close to one end of the mixing tube 1.

[0022] like Figure 1-5As shown, the tips of the two mixing cones 6 are arranged opposite to each other and fixedly connected, the wide ends of the two mixing cones 6 are fixedly assembled and connected to the inner wall of the front tube 3, and the diameter of the drainage groove 8 is one fifth of the diameter of the front tube 3. By assembling and connecting the two tips of the mixing cones 6, a certain space is created between the two mixing cones 6 for the materials to be mixed in the space between the two mixing cones 6.

[0023] like Figure 1-5 As shown, two mixing fans 7 are provided and symmetrically arranged on the inner wall of the front tube 3, and blades 9 are provided on the side walls of the mixing fans 7. The blades 9 on the two mixing fans 7 are staggered. By setting two rotating blades 9, when the material passes through the mixing fans 7, the flow of the material drives the mixing fans 7 to rotate, thereby achieving better mixing of the material.

[0024] like Figure 1-5 As shown, one end of the mixing tube 1 and one end of the front tube 3 are respectively provided with a positioning flange 10, the two positioning flanges 10 are assembled and connected by bolts 11, and the two positioning flanges 10 are assembled and connected by a sealing gasket 12. By installing the end faces of the mixing tube 1 and the front tube 3 through the positioning flange 10, the front tube 3 can be disassembled from the mixing tube 1 during cleaning, which facilitates the separate cleaning of the front tube 3 and the mixing tube 1, making cleaning more convenient and avoiding material residue.

[0025] like Figure 1-5 As shown, a fixed tube 13 is provided on the side wall of the front tube 3, and a rotating shaft 14 is slidably provided at the center of the mixing fan 7. Both ends of the rotating shaft 14 extend into the two fixed tubes 13 respectively. A sealing cover 15 is threadedly connected to the outer wall of the fixed tube 13. A bearing rotatably connected to the end face of the rotating shaft 14 is provided in the sealing cover 15. When the mixing fan 7 is disassembled, the sealing covers 15 at both ends can be threadedly disassembled. At this time, the bearings on the sealing covers 15 are separated from the end faces of the rotating shaft 14, which makes it easy to separate the rotating shaft 14 from the mixing fan 7 and take the rotating shaft 14 out of the fixed tube 13. At this time, the mixing fan 7 loses its limit and can be directly separated from the front tube 3, which is convenient for disassembly, and vice versa during installation.

[0026] like Figure 1-5 As shown, a limit groove 16 is provided on the outer wall of the rotating shaft 14, and a limit bar 17 is provided on the inner wall of the mixing fan 7 for sliding engagement with the limit groove 16. The mutual engagement of the limit groove 16 and the limit bar 17 facilitates the limit linkage between the rotating shaft 14 and the mixing fan 7.

[0027] Working principle: When mixing materials, the materials are introduced from the feed flange 5, the materials first enter the front pipe 3, and the materials flow in from the drainage groove 8 on the outer wall of the mixing cone 6, and pass through the two mixing cones 6 in sequence. When the materials pass between the two mixing cones 6, the materials are mixed for the first time, and the drainage groove 8 is spirally arranged, which can guide the materials to different positions to achieve a rapid mixing effect. After passing through the mixing cone 6, the mixed materials pass through the mixing fan 7, wherein the mixing fan 7 is rotatably connected to the front pipe 3. When the materials pass through the mixing fan 7, the flow of the materials drives the mixing fan 7 to rotate, which can achieve secondary large-scale mixing of the materials. After the secondary mixing, the materials are almost mixed, and the materials flow out from the front pipe 3 and enter the mixing tube 1, and the final mixing is achieved through the mixing blades 2 in the mixing tube 1, thereby achieving a better mixing effect.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A polyvinyl acetate static mixing device, comprising a mixing tube (1), wherein a mixing blade (2) is provided in the mixing tube (1), characterized in that: One end of the mixing tube (1) is connected to a feed flange (5) through a front tube (3), and the other end of the mixing tube (1) is provided with a discharge flange (4). The mixing blade (2) is arranged at one end of the mixing tube (1) close to the discharge flange (4). The front and rear ends of the front tube (3) are respectively provided with a mixing cone (6) and a mixing fan (7). The mixing cone (6) is arranged in a conical structure. There are two mixing cones (6) and they are symmetrically arranged. The end faces of the two mixing cones (6) are assembled and connected. The outer wall of the mixing cone (6) is provided with a drainage groove (8). The drainage groove (8) is arranged in a spiral shape and is provided with a plurality of them. The mixing fan (7) is rotatably arranged on the inner wall of the front tube (3) close to one end of the mixing tube (1).

2. A polyvinyl acetate static mixing device according to claim 1, characterized in that: The tips of the two mixing cones (6) are arranged opposite to each other and fixedly connected, the wide ends of the two mixing cones (6) are fixedly assembled and connected to the inner wall of the front tube (3), and the diameter of the drainage groove (8) is one fifth of the diameter of the front tube (3).

3. A polyvinyl acetate static mixing device according to claim 2, characterized in that: The mixing fans (7) are provided with two and are symmetrically arranged on the inner wall of the front tube (3); the side walls of the mixing fans (7) are provided with blades (9); and the blades (9) on the two mixing fans (7) are staggered.

4. A polyvinyl acetate static mixing device according to claim 3, characterized in that: One end of the mixing pipe (1) and one end of the front pipe (3) are respectively provided with a positioning flange (10), the two positioning flanges (10) are assembled and connected by bolts (11), and the two positioning flanges (10) are assembled and connected by a sealing gasket (12).

5. A polyvinyl acetate static mixing device according to claim 4, characterized in that: A fixed tube (13) is provided on the side wall of the front tube (3), a rotating shaft (14) is slidably provided at the center of the mixing fan (7), two ends of the rotating shaft (14) respectively extend into the two fixed tubes (13), a sealing cover (15) is threadedly connected to the outer wall of the fixed tube (13), and a bearing is provided in the sealing cover (15) and is rotatably connected to the end face of the rotating shaft (14).

6. A polyvinyl acetate static mixing device according to claim 5, characterized in that: The outer wall of the rotating shaft (14) is provided with a limiting groove (16), and the inner wall of the mixing fan (7) is provided with a limiting strip (17) which is slidably engaged with the limiting groove (16) for limiting position.

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