Double-end spiral mixer

Abstract

The utility model relates to a double-headed spiral mixer, which comprises a shell, two central shafts, a synchronous gear set, a speed reducing motor and two double-headed spiral blade sets, materials to be stirred and mixed enter the shell from a feed port on the upper side of the shell, the speed reducing motor is started to drive the two central shafts to rotate through the synchronous gear set, and the two central shafts are driven to rotate through the double-headed spiral blade sets. The two double-end spiral blade sets are arranged on the two center shafts respectively, the spiral blades on the center shafts stir materials in the shell when rotating and convey the materials to the discharging port, the stirred and mixed materials are discharged from the discharging port, the two spiral blades are arranged on the center shafts, the spiral blades are arranged on the center shafts more densely, and therefore the stirring effect is better. The number of spiral turns on the unit axial length is larger, the number of times that the spiral blades divide the materials on the unit axial length is larger, the two spiral blades divide the materials into smaller units, the mixing effect of the mixer is improved, the materials are stacked in a narrower area, and the filling rate of the mixer is improved.

Description

Technical Field

[0001] This utility model relates to the field of mixing machine technology, and in particular to a double-headed spiral mixing machine. Background Technology

[0002] Existing spiral mixers include a twin-screw conveyor, a housing, a synchronous gear set, and a motor. They employ a twin-screw conveyor structure with an inlet at the head and an outlet at the tail. Material enters through the inlet, and the motor drives the twin-screw to rotate synchronously via the synchronous gear set. After being mixed by the twin-screw structure, the material exits directly from the outlet, thus achieving mixing and discharge. However, existing twin-screw mixers use single-head spiral blades, resulting in poor mixing performance, as the material reaches the outlet before it is fully mixed.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses a double-headed spiral mixer to solve the problem of poor mixing effect and materials reaching the discharge port before being fully mixed.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A double-headed screw mixer includes:

[0007] The housing has a hollow structure, with a feed inlet at the first end on the upper side and a discharge outlet at the second end on the lower side.

[0008] The housing has two central shafts, which are mounted side by side.

[0009] A synchronizing gear set is located at the first end of the housing, and the shaft ends of the two central shafts are respectively connected to two meshing gears in the synchronizing gear set;

[0010] A geared motor is located at the first end of the synchronous gear set, and the geared motor drives the gears in the synchronous gear set to rotate.

[0011] The double-headed helical blade assembly has two blades, which are respectively disposed on the two central shafts. The double-headed helical blade assembly includes two helical blades. The two helical blades are wound in parallel around the surface of the central shaft with the same pitch, and the starting ends of the two helical blades have an angular difference in the circumferential direction.

[0012] A further technical solution is that the central shaft includes a first central shaft and a second central shaft. The first central shaft has a central shaft input end at its shaft end. The synchronous gear set includes a first gear and a second gear. The first central shaft and the second central shaft are respectively connected to the first gear and the second gear. The first gear meshes with the second gear. The central shaft input end passes through the first gear and extends into the output end of the reduction motor. The reduction motor drives the first central shaft to rotate, thereby causing the first gear to rotate. The second gear rotates synchronously, thereby causing the second central shaft to rotate.

[0013] A further technical solution is that the double-headed helical blade groups on the first central axis and the second central axis have opposite directions of rotation. The double-headed helical blade group on the first central axis is a right-handed helical, and the double-headed helical blade group on the second central axis is a left-handed helical. The starting ends of the two helical blades of the double-headed helical blade group have an angle difference of 180° in the circumferential direction.

[0014] A further technical solution is that the double-headed helical blade group on the first central shaft and the double-headed helical blade group on the second central shaft are arranged alternately, and the double-headed helical blade group on the first central shaft and the double-headed helical blade group on the second central shaft partially overlap in the longitudinal section.

[0015] A further technical solution is that the double-headed spiral mixer also includes two dry gas sealing assemblies, which are symmetrically fixed to the outside of the housing; the shaft heads and shaft tails of the two central shafts extend out of the first end and the second end of the housing, respectively. Each dry gas sealing assembly includes two dry gas sealing seats, an air supply pipe, and an air supply device. The air supply device is connected to the air supply pipe, and the first and second ends of the air supply pipe are respectively connected to the two dry gas sealing seats. The two dry gas sealing seats are respectively sleeved on the shaft heads and shaft tails of the central shafts, and dry gas seal the shaft heads and shaft tails of the central shafts.

[0016] A further technical solution is that the feed inlet has several ports, which are laterally spaced on the upper side of the housing.

[0017] A further technical solution is that an exhaust port is also provided at the second end of the upper side of the housing.

[0018] A further technical solution is that the double-headed spiral mixer also includes two housing supports and a motor support. The upper sides of the two housing supports are respectively connected to the lower sides of both ends of the housing, and the lower sides of the housing supports are connected to the ground. The upper side of the motor support is connected to the lower side of the reduction motor, and the lower side of the motor support is connected to the ground.

[0019] The beneficial effects of this utility model embodiment are as follows:

[0020] (I) A double-headed spiral mixer includes a shell, two central shafts, a synchronous gear set, a reduction motor, and two double-headed spiral blade sets. The material to be mixed enters the shell from the feed port on the upper side of the shell. The shaft ends of the two central shafts are respectively connected to two meshing gears in the synchronous gear set. The reduction motor is started to drive the two central shafts to rotate through the synchronous gear set. The two double-headed spiral blade sets are respectively set on the two central shafts. When the spiral blades on the central shafts rotate, they stir and convey the material in the shell. When the material reaches the discharge port, the mixed material is discharged from the discharge port. The central shaft has two spiral blades. The spiral blades are arranged more densely on the central shaft, with more spiral turns per unit shaft length. The spiral blades divide the material more times per unit shaft length. The two spiral blades divide the material into smaller units, improving the mixing effect of the mixer. The material accumulates in a narrower area, improving the filling rate of the mixer.

[0021] (ii) Furthermore, the double-headed helical blades on the first central shaft and the double-headed helical blades on the second central shaft are arranged alternately. Through this alternating arrangement of the double-headed helical blades, and the partial overlap of the double-headed helical blades on the first and second central shafts in the longitudinal section, the interaction between the material and the first and second central shafts increases material collision and separation, avoiding material accumulation and uneven mixing. The alternating arrangement allows the material to form a more complex motion trajectory during mixing, thereby significantly improving the uniformity of mixing. Moreover, the radial rotation caused by the alternating action of the helical blades makes material conveying more efficient.

[0022] (III) Furthermore, the double-headed screw mixer also includes two dry gas sealing assemblies, which are symmetrically fixed to the outside of the housing. The shaft heads and tails of the two central shafts extend from the first and second ends of the housing, respectively. Each dry gas sealing assembly includes two dry gas sealing seats, an air supply pipe, and an air supply device. The air supply device is connected to the air supply pipe, and the first and second ends of the air supply pipe are respectively connected to the two dry gas sealing seats. The two dry gas sealing seats are respectively fitted onto the shaft heads and tails of the central shafts, sealing them with dry gas. The air supply device pressurizes dry inert gas or compressed air and delivers it to the two dry gas sealing seats through the air supply pipe. The gas enters the dry gas sealing seats at an appropriate pressure and forms a stable gas film between the central shaft and the dry gas sealing seats, preventing the material inside the mixer from leaking into the external environment and isolating external air, dust, or other contaminants from entering the mixer. Meanwhile, the use of dry gas sealing components at the head and tail of the central shaft avoids the contact friction between the sealing device and the central shaft in traditional sealing methods, thus extending the service life of the central shaft. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the double-headed spiral mixer of this utility model.

[0024] Figure 2 This is a top view of the double-headed spiral mixer of this utility model.

[0025] Figure 3 This is a top view of the central shaft in the double-headed spiral mixer of this utility model.

[0026] In the picture:

[0027] 100. Housing; 101. Feed inlet; 102. Discharge outlet; 103. Exhaust outlet; 200. Central shaft; 210. First central shaft; 211. Central shaft input end; 220. Second central shaft; 300. Synchronous gear set; 310. First gear; 320. Second gear; 400. Gear motor; 500. Double-headed helical blade set; 600. Dry gas sealing assembly; 610. Dry gas sealing seat; 620. Air supply pipe; 630. Air supply device; 700. Housing support; 800. Motor support. Detailed Implementation

[0028] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, only used to conveniently and clearly assist in illustrating the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0030] Example:

[0031] Figure 1 This is a front view structural diagram of the double-headed screw mixer of this utility model. Figure 1As shown, a double-headed spiral mixer includes a housing 100, two central shafts 200, a synchronous gear set 300, a reduction motor 400, and two double-headed spiral blade sets 500.

[0032] like Figure 1 As shown, the housing 100 has a hollow structure. A feed inlet 101 is located at the first upper end of the housing 100, and a discharge outlet 102 is located at the second lower end of the housing 100. For example, there are several feed inlets 101, which are laterally spaced on the upper side of the housing 100. Different materials are added into the housing 100 through these feed inlets 101, achieving step-by-step mixing in the mixer and improving its mixing efficiency.

[0033] Figure 2 This is a top view of the double-headed spiral mixer of this utility model. Figure 3 This is a top view of the central shaft in the double-headed screw mixer of this utility model. Figures 2-3 As shown, two central shafts 200 are mounted side-by-side inside the housing 100. A synchronous gear set 300 is located at the first end of the housing 100, and the shaft ends of the two central shafts 200 are respectively connected to two meshing gears in the synchronous gear set 300. A geared motor 400 is located at the first end of the synchronous gear set 300, and the geared motor 400 drives the gears in the synchronous gear set 300 to rotate. For example, the central shaft 200 includes a first central shaft 210 and a second central shaft 220. The shaft end of the first central shaft 210 is provided with a central shaft input end 211. The synchronous gear set 300 includes a first gear 310 and a second gear 320. The first central shaft 210 and the second central shaft 220 are respectively connected to the first gear 310 and the second gear 320. The first gear 310 meshes with the second gear 320. The central shaft input end 211 passes through the first gear 310 and extends into the output end of the geared motor 400. The geared motor 400 drives the first central shaft 210 to rotate, thereby causing the first gear 310 to rotate. The second gear 320 rotates synchronously, thereby causing the second central shaft 220 to rotate.

[0034] like Figure 3 As shown, two double-headed helical blade assemblies 500 are respectively disposed on two central shafts 200. Each double-headed helical blade assembly 500 includes two helical blades, preferably, the helical blades are continuous strip-shaped metal structures. The two helical blades are wound in parallel around the surface of the central shaft 200 with the same pitch.

[0035] like Figure 3As shown, the double-headed helical blade sets 500 on the first central shaft 210 and the second central shaft 220 have opposite directions of rotation. The double-headed helical blade set 500 on the first central shaft 210 is a right-handed helical blade, and the double-headed helical blade set 500 on the second central shaft 220 is a left-handed helical blade. The helical blades with opposite directions of rotation can effectively guide the material to flow in different directions along the shell 100. When the left-handed and right-handed helical blades interact, the material is propelled axially and pushed to different areas by the rotating blades, thereby ensuring that the material is evenly distributed throughout the mixing chamber and improving the mixing effect of the mixer. The two helical blades in a double-headed helical blade set 500 have a 180° angle difference at their starting ends in the circumferential direction. The starting ends of the two helical blades are separated by a semicircle. Since the pitch of the two helical blades is the same, the interval between the two helical blades on the central shaft 200 is the same everywhere. When one blade finishes its pushing action, the other blade immediately takes over, forming a continuous and stable material flow, making the material more evenly mixed.

[0036] like Figure 3 As shown, furthermore, the double-headed helical blade assembly 500 on the first central shaft 210 and the double-headed helical blade assembly 500 on the second central shaft 220 are arranged alternately, and the double-headed helical blade assembly 500 on the first central shaft 210 and the double-headed helical blade assembly 500 on the second central shaft 220 partially overlap in the longitudinal section. Through the alternating arrangement of the double-headed helical blade assembly 500, the interaction between the material and the first central shaft 210 and the second central shaft 220 increases the collision and separation of the material, avoiding the phenomena of material accumulation and uneven mixing. The alternating arrangement makes the material form a more complex motion trajectory during the mixing process, thereby greatly improving the uniformity of mixing. Moreover, due to the rotation generated in the radial direction by the alternating action of the helical blades, the material conveying is more efficient.

[0037] like Figures 1-2As shown, the double-headed screw mixer further includes two dry gas sealing assemblies 600, which are symmetrically fixed to the outside of the housing 100. The shaft heads and tails of the two central shafts 200 extend out of the first and second ends of the housing 100, respectively. Each dry gas sealing assembly 600 includes two dry gas sealing seats 610, an air supply pipe 620, and an air supply device 630. The air supply device 630 is connected to the air supply pipe 620. The first and second ends of the air supply pipe 620 are respectively connected to the two dry gas sealing seats 610. The two dry gas sealing seats 610 are respectively fitted onto the shaft heads and tails of the central shafts 200, thus sealing the shaft heads and tails of the central shafts 200 with dry gas. The air supply device 630 pressurizes dry inert gas or compressed air and delivers it to two dry gas sealing seats 610 through the air supply pipe 620. The gas enters the dry gas sealing seats 610 at an appropriate pressure and forms a stable gas film between the central shaft 200 and the dry gas sealing seats 610, preventing material inside the mixer from leaking into the external environment and isolating external air, dust, or other contaminants from entering the mixer. Simultaneously, the dry gas sealing assembly 600 seals the head and tail of the central shaft 200, avoiding the contact friction between the sealing device and the central shaft in traditional seals, thus extending the service life of the central shaft 200.

[0038] like Figure 1 As shown, a vent 103 is further provided at the second end of the upper side of the housing 100. When the double-headed screw mixer is working, especially when mixing some highly viscous, volatile or gaseous materials, gas may be generated during the mixing process. The vent 103 can discharge these gases in a timely manner to prevent them from accumulating in the equipment and to maintain the normal air pressure and operating environment inside the mixer.

[0039] like Figure 1 As shown, the double-headed screw mixer further includes two housing supports 700 and a motor support 800. The upper sides of the two housing supports 700 are respectively connected to the lower sides of both ends of the housing 100, and the lower sides of the housing supports 700 are connected to the ground. The upper side of the motor support 800 is connected to the lower side of the geared motor 400, and the lower side of the motor support 800 is connected to the ground.

[0040] In operation, this embodiment is as follows:

[0041] Different materials are added into the housing 100 through several feed ports 101. The geared motor 400 is started to drive the first central shaft 210 to rotate. The rotation of the first central shaft 210 drives the first gear 310 to rotate. The second gear 320 rotates synchronously, driving the second central shaft 220 to rotate. The spiral blades on the first central shaft 210 and the second central shaft 220 stir and transport the materials in the housing 100 to the discharge port 102 when they rotate. The stirred and mixed materials are discharged from the discharge port 102. Finally, the exhaust port 103 is opened to discharge the high-pressure hot air generated by the mixing in the housing 100, thus completing the mixing process.

[0042] In this embodiment, the spiral blades are more densely arranged on the central shaft 200, with more spiral turns per unit shaft length. The spiral blades divide the material more times per unit shaft length. The two spiral blades divide the material into smaller units, improving the mixing effect of the mixer. The material accumulates in a narrower area, increasing the filling rate inside the mixer.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A double-headed screw mixer, characterized in that, include: The housing (100) is a hollow structure. The first end of the upper side of the housing (100) is provided with a feed inlet (101), and the second end of the lower side of the housing (100) is provided with a discharge outlet (102). Two central shafts (200) are provided, and the two central shafts (200) are mounted side by side inside the housing (100); Synchronous gear set (300), the synchronous gear set (300) is disposed at the first end of the housing (100), and the shaft ends of the two central shafts (200) are respectively connected to two meshing gears in the synchronous gear set (300); A geared motor (400) is provided at the first end of the synchronous gear set (300), and the geared motor (400) drives the gears in the synchronous gear set (300) to rotate. The double-headed helical blade assembly (500) has two blades, which are respectively disposed on the two central shafts (200). The double-headed helical blade assembly (500) includes two helical blades, which are wound in parallel around the surface of the central shaft (200) with the same pitch.

2. The double-headed screw mixer according to claim 1, characterized in that: The central shaft (200) includes a first central shaft (210) and a second central shaft (220), with a central shaft input end (211) at the shaft end of the first central shaft (210); the synchronous gear set (300) includes a first gear (310) and a second gear (320), with the first central shaft (210) and the second central shaft (220) respectively connected to the first gear (310) and the second gear (320), and the first gear (310) meshing with the second gear (320); the central shaft input end (211) passes through the first gear (310) and extends into the output end of the geared motor (400), and the geared motor (400) drives the first central shaft (210) to rotate, thereby causing the first gear (310) to rotate, and the second gear (320) rotates synchronously, thereby causing the second central shaft (220) to rotate.

3. The double-headed screw mixer according to claim 2, characterized in that: The double-headed helical blade assembly (500) on the first central shaft (210) and the second central shaft (220) have opposite directions of rotation. The double-headed helical blade assembly (500) on the first central shaft (210) is a right-handed helix, and the double-headed helical blade assembly (500) on the second central shaft (220) is a left-handed helix. The starting ends of the two helical blades of the double-headed helical blade assembly (500) have an angle difference of 180° in the circumferential direction.

4. The double-headed screw mixer according to claim 2, characterized in that: The double-headed helical blade assembly (500) on the first central shaft (210) and the double-headed helical blade assembly (500) on the second central shaft (220) are arranged alternately, and the double-headed helical blade assembly (500) on the first central shaft (210) and the double-headed helical blade assembly (500) on the second central shaft (220) partially overlap in longitudinal section.

5. The double-headed screw mixer according to claim 1, characterized in that: The double-headed spiral mixer also includes two dry gas sealing assemblies (600), which are symmetrically fixed to the outside of the housing (100). The shaft heads and tails of the two central shafts (200) extend from the first end and the second end of the housing (100), respectively. Each dry gas sealing assembly (600) includes two dry gas sealing seats (610), an air supply pipe (620), and an air supply device (630). The air supply device (630) is connected to the air supply pipe (620). The first end and the second end of the air supply pipe (620) are respectively connected to the two dry gas sealing seats (610). The two dry gas sealing seats (610) are respectively sleeved on the shaft head and the shaft tail of the central shaft (200) and dry gas seal the shaft head and the shaft tail of the central shaft (200).

6. The double-headed screw mixer according to claim 1, characterized in that: The feed inlets (101) are a plurality of such inlets (101) which are laterally spaced on the upper side of the housing (100).

7. The double-headed screw mixer according to claim 1, characterized in that: An exhaust port (103) is also provided at the second end of the upper side of the housing (100).

8. The double-headed screw mixer according to claim 1, characterized in that: The double-headed spiral mixer also includes two housing supports (700) and one motor support (800). The upper sides of the two housing supports (700) are respectively connected to the lower sides of both ends of the housing (100), and the lower sides of the housing supports (700) are connected to the ground. The upper side of the motor support (800) is connected to the lower side of the geared motor (400), and the lower side of the motor support (800) is connected to the ground.

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