Turbulent flow mixer

Abstract

The utility model provides a turbulent flow mixer which comprises a mixer main body and a connecting cylinder arranged in front of the mixer main body, plastic fluid and auxiliaries enter a mixing cavity from one side of a material inlet of the mixing cylinder through the connecting cylinder, and the viscous fluid dispersedly flows towards the outer side along the outer side wall of a conical first back pressure piece. The viscous fluid is dispersed through screen holes in the screen drum and is further extruded and fully mixed in a cavity formed between the screen drum and the mixing drum, the viscous fluid flows in a cavity formed by the outer side wall of the second backpressure part and the inner wall of the mixing cavity, the inner diameter of the mixing cavity of the section is gradually and linearly reduced, and the viscous fluid is uniformly mixed. The viscous fluid is extruded, dispersed and uniformly mixed for multiple times in the mixing cavity, the extruded product is better in flatness and small in contractility, the structure is stable and reasonable in work, and compared with a traditional mixer of a cross welding structure, no welding dead angle exists, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of mixers, in particular to a turbulent flow mixer. Background Art

[0002] A turbulent mixer is a device that uses the turbulent flow phenomenon of fluids to achieve fast and efficient mixing. This type of mixer is widely used in chemical, biological, pharmaceutical and other fields to promote the mixing, dispersion and reaction between different liquids, gases or particles. In the chemical field, plastics are produced, and the properties of plastics can be improved by adding other additives, such as plasticizers, antioxidants, heat-resistant agents, weather-resistant agents, etc. These additives can reduce the viscosity of plastics, making them easier to process and shape. At this time, a turbulent mixer is needed to mix the plastics and components.

[0003] Before mixing the plastic fluid, the plastic particles to be mixed are preheated to reach a molten state, and then the molten plastic fluid and additives are transported to the mixer through a screw pump. However, the internal structure of an existing turbulent mixer is a cross-welded structure. After the material enters, there are dead corners at the welding points, which can easily lead to poor material flow, resulting in dead material on the surface of the product and unstable extrusion. The static internal structure of the cross-welded structure is prone to structural collapse and damage due to long-term use of the welding points and excessive pressure.

[0004] Therefore, it is necessary to provide a new turbulent mixer to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a turbulent flow mixer.

[0006] The turbulent flow mixer provided by the utility model comprises: a mixer body and a connecting cylinder arranged in front of the mixer body;

[0007] The mixer main body includes a mixing drum, a back-pressure mixing element and a sieve drum, a mixing chamber is provided in the mixing drum, an end of the mixing drum close to the connecting drum is provided with a feed port, the end of the mixing drum with the feed port is connected to the connecting drum, and the other end of the mixing drum is provided with a discharge port, the inner diameter of the mixing chamber of the mixing drum remains unchanged from the feed port to the middle section, the inner diameter of the mixing chamber linearly decreases from the middle section to the discharge port and forms a trumpet shape in this section, a sieve drum is fixedly installed in the mixing chamber of the mixing drum, a plurality of sieve holes for fluid passage are provided on the sieve drum, the outer side wall of one end of the sieve drum is fixedly connected to the inner side wall of the mixing drum close to the feed port, the inner side wall of the end of the sieve drum away from the mixing drum feed port is fixedly connected to the outer side wall of the back-pressure mixing element, the end of the back-pressure mixing element close to the feed port is conical, and the end close to the discharge port is a parabolic cone.

[0008] Preferably, the back-pressure mixing element includes a first back-pressure element and a second back-pressure element, the outer side wall of the first back-pressure element is fixedly connected to the inner side wall of the screen cylinder, one side of the first back-pressure element is fixedly connected to a connecting element, one end of the connecting element away from the first back-pressure element passes through the side wall of the screen cylinder and is fixedly connected to one end of the second back-pressure element, and one end of the second back-pressure element is fixedly connected to one end of the screen cylinder.

[0009] Preferably, the first back-pressure member is in the shape of a cone, and the second back-pressure member is in the shape of a parabolic cone.

[0010] Preferably, the connecting cylinder includes a first mounting cylinder and a second mounting cylinder, one end of the second mounting cylinder is fixedly connected to the end of the mixing cylinder provided with a feed port, one end of the first mounting cylinder is fixedly connected to the end of the second mounting cylinder away from the mixing cylinder, the inner diameter of the cavity of the first mounting cylinder linearly decreases from left to right, and the inner diameter of the active cavity of the second mounting cylinder linearly increases from left to right.

[0011] Preferably, a feed pipe for the auxiliary agent to enter is provided on the second installation cylinder, and the feed pipe is fixedly installed on the side wall of the second installation cylinder.

[0012] Preferably, an inlet flange is provided at one end of the first mounting barrel away from the second mounting barrel, and an outlet flange is provided at one end of the mixing barrel at the discharge port.

[0013] Compared with the related art, the turbulent mixer provided by the present invention has the following beneficial effects:

[0014] The utility model provides a turbulent mixer, in which plastic fluid and additives enter the mixing chamber from one side of the mixing barrel inlet through a connecting barrel, and the viscous fluid disperses and flows outward along the outer side wall of the first back pressure piece in a cone shape, so that the viscous fluid passes through the sieve holes on the screen barrel, disperses the viscous fluid, and is further extruded and fully mixed in the cavity formed between the screen barrel and the mixing barrel, and the viscous fluid flows in the cavity formed by the outer side wall of the second back pressure piece in a parabolic cone shape and the inner wall of the mixing chamber, and the inner diameter of the mixing chamber in this section gradually decreases linearly, and is finally extruded from the discharge port of the mixing barrel, and the viscous fluid is extruded, dispersed, and mixed uniformly for multiple times in the mixing chamber, so that the extruded viscous fluid is pressure-built and dispersed and mixed, so that the material temperature is uniform, the extruded product has better flatness and less shrinkage, and the structure is stable in operation and reasonable in structure, and compared with the traditional mixer with a cross-welded structure, there is no welding dead angle, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic cross-sectional view of the turbulent mixer provided by the present invention;

[0016] Figure 2This is a disassembled diagram of the main structure of the mixer provided by the utility model;

[0017] Figure 3 This is a schematic diagram of the screen drum structure provided by the utility model.

[0018] Numbers in the figure: 1, mixing cylinder; 2, feed inlet; 3, discharge port; 4, screen cylinder; 5, screen hole; 6, first back pressure member; 7, second back pressure member; 8, connecting member; 9, first mounting cylinder; 10, second mounting cylinder; 11, feed pipe; 12, inlet flange; 13, outlet flange. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0020] Please refer to Figure 1-Figure 3 ,in, Figure 1 A schematic cross-sectional view of the turbulent mixer provided by the present invention; Figure 2 This is a disassembled diagram of the main structure of the mixer provided by the utility model; Figure 3 This is a schematic diagram of the screen drum structure provided by the utility model.

[0021] In the specific implementation process, Figure 1-Figure 3As shown, a turbulent mixer comprises: a mixer body and a connecting cylinder arranged in front of the mixer body, the mixer body comprises a mixing cylinder 1, a back pressure mixing element and a screen cylinder 4, a mixing chamber is provided in the mixing cylinder 1, an end of the mixing cylinder 1 close to the connecting cylinder is provided with an inlet 2, the end of the mixing cylinder 1 provided with the inlet 2 is connected to the connecting cylinder, and the other end of the mixing cylinder 1 is provided with a discharge port 3, the inner diameter of the mixing chamber of the mixing cylinder 1 remains unchanged from the inlet 2 to the middle section, the inner diameter of the mixing chamber decreases linearly from the middle section to the discharge port 3 and forms a trumpet shape in this section, a screen cylinder 4 is fixedly installed in the mixing chamber of the mixing cylinder 1, a plurality of screen holes 5 for fluid to pass through are provided on the screen cylinder 4, the outer wall of one end of the screen cylinder 4 is fixedly connected to the inner wall of the mixing cylinder 1 close to the inlet 2, and the screen cylinder 4 is fixedly connected to the outer wall of the back-pressure mixer at one end away from the feeding port 2 of the mixing drum 1. The end of the back-pressure mixer close to the feeding port 2 is cone-shaped, and the end close to the discharging port 3 is a parabolic cone. The back-pressure mixer includes a first back-pressure member 6 and a second back-pressure member 7. The outer wall of the first back-pressure member 6 is fixedly connected to the inner wall of the screen drum 4. One side of the first back-pressure member 6 is fixedly connected with a connecting member 8. The end of the connecting member 8 away from the first back-pressure member 6 passes through the side wall of the screen drum 4 and is fixedly connected to one end of the second back-pressure member 7. One end of the second back-pressure member 7 is fixedly connected to one end of the screen drum 4. The first back-pressure member 6 is cone-shaped, and the second back-pressure member 7 is a parabolic cone. The viscous fluid enters the mixing chamber from the side of the feeding port 2 of the mixing drum 1 and flows along the mixing chamber. The viscous fluid flows outward along the outer wall of the first back pressure member 6 in a cone shape, so that the viscous fluid passes through the sieve hole 5 on the screen drum 4, disperses the viscous fluid, and is further squeezed and fully mixed in the cavity formed between the screen drum 4 and the mixing drum 1. The viscous fluid flows along the outer wall of the second back pressure member 7 in a parabolic cone and the cavity formed by the inner wall of the mixing cavity of the mixing drum 1. Finally, the viscous fluid is squeezed out from the discharge port 3 of the mixing drum 1. The connecting cylinder includes a first mounting cylinder 9 and a second mounting cylinder 10. One end of the second mounting cylinder 10 is fixedly connected to the end of the mixing drum 1 provided with the feed port 2, and one end of the first mounting cylinder 9 is fixedly connected to the end of the second mounting cylinder 10 away from the mixing drum 1. The inner diameter of the cavity of the first mounting cylinder 9 is linear from left to right. The inner diameter of the movable cavity of the second mounting cylinder 10 increases linearly from left to right. A feed pipe 11 for the entry of auxiliary agents is provided on the second mounting cylinder 10. The feed pipe 11 is fixedly installed on the side wall of the second mounting cylinder 10. The plastic fluid enters from one side of the first mounting cylinder 9. When the plastic fluid passes through the first mounting cylinder 9, the inner diameter of the first mounting cylinder 9 is reduced, so that the flow rate of the plastic fluid is increased, and a negative pressure siphon effect is generated on the pipe mouth fixed at the bottom of the feed pipe 11 on the second mounting cylinder 10, which promotes the auxiliary agent components to smoothly pass through the feed pipe 11 into the second mounting cylinder 10. An inlet flange 12 is provided at the end of the first mounting cylinder away from the second mounting cylinder for connecting to a conveying device, and an outlet flange 13 is provided at one end of the discharge port 3 of the mixing cylinder 1 for connecting to a plastic molding device.

[0022] The working principle provided by the present invention is as follows: the plastic fluid enters from one side of the first mounting cylinder 9. When the plastic fluid passes through the first mounting cylinder 9, the inner diameter of the first mounting cylinder 9 is reduced, so that the flow rate of the plastic fluid is increased, and a negative pressure siphon effect is generated on the pipe mouth at the bottom of the feed pipe 11 fixed on the second mounting cylinder 10, thereby promoting the auxiliary component to smoothly pass through the feed pipe 11 into the second mounting cylinder 10. The viscous fluid enters the mixing chamber from one side of the feeding port 2 of the mixing cylinder 1 and disperses and flows outward along the outer wall of the first back pressure piece 6 in a cone shape, so that the viscous fluid passes through the sieve hole 5 on the screen cylinder 4, disperses the viscous fluid, and is further extruded and fully mixed in the cavity formed between the screen cylinder 4 and the mixing cylinder 1. The viscous fluid flows in the cavity formed by the outer wall of the second back pressure piece 7 in a parabolic cone and the inner wall of the mixing chamber of the mixing cylinder 1. The inner diameter of the mixing chamber in this section gradually decreases linearly. Finally, the viscous fluid is squeezed out from the discharge port 3 of the mixing cylinder 1 and enters the plastic molding equipment connected to the mixing cylinder 1 for extrusion, foaming and molding to finally manufacture the product.

[0023] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A turbulent mixer, characterized in that: It includes: a mixer body and a connecting tube arranged in front of the mixer body; The mixer body comprises a mixing cylinder (1), a back pressure mixing element and a screen cylinder (4); a mixing chamber is provided in the mixing cylinder (1); an inlet (2) is provided at one end of the mixing cylinder (1) close to the connecting cylinder; the end of the mixing cylinder (1) provided with the inlet (2) is connected to the connecting cylinder; the other end of the mixing cylinder (1) is provided with a discharge port (3); the inner diameter of the mixing chamber of the mixing cylinder (1) remains unchanged from the inlet (2) to the middle section, and the inner diameter of the mixing chamber decreases linearly from the middle section to the discharge port (3) and forms a trumpet shape in this section A sieve drum (4) is fixedly installed in the mixing chamber of the mixing drum (1), and a plurality of sieve holes (5) for fluid to pass through are provided on the sieve drum (4). The outer wall of one end of the sieve drum (4) is fixedly connected to the inner wall of the mixing drum (1) near the feed port (2), and the inner wall of the end of the sieve drum (4) away from the feed port (2) of the mixing drum (1) is fixedly connected to the outer wall of the back-pressure mixing element. The end of the back-pressure mixing element near the feed port (2) is conical, and the end near the discharge port (3) is a parabolic cone.

2. The turbulent mixer according to claim 1, characterized in that The back-pressure mixing element comprises a first back-pressure element (6) and a second back-pressure element (7), the outer side wall of the first back-pressure element (6) is fixedly connected to the inner side wall of the sieve drum (4), one side of the first back-pressure element (6) is fixedly connected to a connecting element (8), one end of the connecting element (8) away from the first back-pressure element (6) passes through the side wall of the sieve drum (4) and is fixedly connected to one end of the second back-pressure element (7), and one end of the second back-pressure element (7) is fixedly connected to one end of the sieve drum (4).

3. The turbulent mixer according to claim 2, characterized in that The first back pressure member (6) is in the shape of a cone, and the second back pressure member (7) is in the shape of a parabolic cone.

4. The turbulent mixer according to claim 3, characterized in that The connecting cylinder comprises a first mounting cylinder (9) and a second mounting cylinder (10), one end of the second mounting cylinder (10) is fixedly connected to an end of the mixing cylinder (1) provided with a feed port (2), one end of the first mounting cylinder (9) is fixedly connected to an end of the second mounting cylinder (10) away from the mixing cylinder (1), the inner diameter of the cavity of the first mounting cylinder (9) decreases linearly from left to right, and the inner diameter of the active cavity of the second mounting cylinder (10) increases linearly from left to right.

5. The turbulent mixer according to claim 4, characterized in that The second installation cylinder (10) is provided with a feed pipe (11) for the auxiliary agent to enter, and the feed pipe (11) is fixedly installed on the side wall of the second installation cylinder (10).

6. The turbulent mixer according to claim 5, characterized in that An inlet flange (12) is provided at one end of the first mounting cylinder away from the second mounting cylinder, and an outlet flange (13) is provided at one end of the discharge port (3) of the mixing cylinder (1).

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