Powder material mixing device

Abstract

The utility model discloses a powder material mixing device. Comprising a mixing barrel, a mounting bracket arranged at the top of the mixing barrel, a feeding bin arranged on the mounting bracket and communicated with the mixing barrel, a stirring device mounted on the mounting bracket and used for stirring materials in the mixing barrel, and a driving device used for driving the stirring device to rotate, the stirring device is arranged at the bottom of the mixing barrel, the scraping device is arranged at the bottom of the stirring device, the receiving bin is arranged at the bottom of the mixing barrel, the mixing screen is mounted between the mixing barrel and the receiving bin, and powder materials enter the receiving bin through screen holes of the mixing screen; a detachable height fixing block is arranged at the joint of the mounting bracket and the mixing barrel body to adjust the mounting height of the mounting bracket, so that the relative position of the scraping device and the mixing sieve is changed. According to the powder material mixing device provided by the utility model, a mixing mode of combining stirring with grinding, sieving and dispersing is adopted, so that powder agglomeration can be reduced, and the mixing uniformity of superfine and ultralight powder materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder material mixing, in particular to an ultra-fine and ultra-light powder material mixing device. Background Art

[0002] Mixing two or more powders into a uniform mixed powder is essential in industries such as pharmaceuticals, coatings, cosmetics, food, and building materials. As the fineness and density of the powder increase, the viscosity increases, increasing the chance of secondary powder formation. Consequently, evenly mixing two or more powders is difficult, and localized agglomeration can occur during mixing, making dispersion difficult.

[0003] In view of this, it is necessary to provide a mixing device suitable for ultrafine and ultralight powder materials to solve the above technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a powder material mixing device, which adopts a mixing method combining stirring with rolling and sieving dispersion, thereby reducing powder agglomeration and improving the mixing uniformity of ultrafine and ultralight powder materials.

[0005] The technical solution of the utility model is as follows:

[0006] A powder material mixing device comprises a mixing cylinder, a mounting bracket provided on the top of the mixing cylinder, a feeding bin provided on the mounting bracket and communicating with the mixing cylinder, a stirring device installed on the mounting bracket and used to stir the material in the mixing cylinder, a driving device for driving the stirring device to rotate, a scraping device provided at the bottom of the stirring device, a material receiving bin provided at the bottom of the mixing cylinder, and a mixing screen provided between the mixing cylinder and the material receiving bin, wherein the powder material enters the material receiving bin through the sieve holes of the mixing screen;

[0007] The installation height of the mounting bracket is adjusted by providing a detachable height-fixing block at the connection between the mounting bracket and the mixing cylinder. When the height-fixing block is installed between the mounting bracket and the mixing cylinder, the scraping device and the mixing screen are spaced apart. When the height-fixing block is removed, the mounting bracket falls and the scraping device contacts the mixing screen.

[0008] Furthermore, the scraper device includes a scraper frame connected to the main shaft of the stirring device and a scraper connected to the scraper frame. When the height-fixing block is installed between the mounting bracket and the mixing cylinder, the scraper and the mixing screen are spaced apart; when the height-fixing block is removed, the scraper contacts the mixing screen.

[0009] Furthermore, there are three scraping devices, which form an angle of 120° with each other.

[0010] Furthermore, the thickness of the height-setting block is 8-12 mm, the scraper is a rubber scraper, and when the height-setting block is installed between the mounting bracket and the mixing cylinder, the scraper is spaced 3-7 mm from the mixing screen.

[0011] Furthermore, the mixing screen includes a first mixing screen and a second mixing screen, the sieve hole diameter of the first mixing screen is smaller than the sieve hole diameter of the second mixing screen, and the material enters the material receiving bin after passing through the first mixing screen and the second mixing screen in sequence.

[0012] Furthermore, the first mixing screen is a 200-250 mesh screen, and the second mixing screen is a 10-35 mesh screen.

[0013] Furthermore, the stirring device includes a main shaft, a bearing and a bearing seat for fixing the main shaft to the mounting bracket, and a double-helix stirring blade provided on the main shaft, and the lowest end of the main shaft is 15-20 mm away from the mixing screen.

[0014] Furthermore, the mixing cylinder and the mounting bracket are fixed by bolt connection, and there are 4-8 connection positions between the two, and each connection position corresponds to a height-fixing block.

[0015] Furthermore, the feeding bin is provided with a bin cover, and the mounting bracket seals the mixing cylinder.

[0016] Furthermore, the material receiving bin is in an inverted cone shape, and a discharge valve is provided at the bottom thereof.

[0017] Compared with the prior art, the powder material mixing device provided by the utility model has the following beneficial effects:

[0018] The powder material mixing device provided by the present invention adopts a mixing method that combines stirring with rolling and sieving dispersion. The stirring device rotates to cause the material in the mixing cylinder to flip up and down to achieve mixing. Then, the scraping device scrapes on the mixing screen to generate a certain pressure, causing the agglomerated powder material to disperse. After the powder material is dispersed by the mixing screen, it falls into the receiving bin. Specifically, the installation height of the mounting bracket is adjusted by setting a fixed height block at the connection between the mounting bracket and the mixing cylinder. When the fixed height block is set between the two, the height of the mounting bracket is raised. At this time, the scraping device and the mixing screen are separated, and the material is flipped up and down. When the fixed height block is removed, the mounting bracket is lowered by tightening the connection between the mounting bracket and the mixing cylinder, thereby driving the scraping device to fall. At this time, the scraping device contacts the mixing screen, and the stirring device is rotated. The scraping device generates a certain pressure on the mixing screen, causing the agglomerated powder material to disperse. Therefore, the powder material mixing device of the present invention can reduce powder agglomeration and improve the mixing uniformity of ultrafine and ultralight powder materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of the powder material mixing device of the present utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are further described below with reference to the accompanying drawings.

[0022] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] See also Figure 1 , is a schematic structural diagram of a powder material mixing device of the present invention. The powder material mixing device of the present invention comprises a mixing cylinder 1, a mounting bracket 2 provided on the top of the mixing cylinder 1, a feeding bin 3 provided on the mounting bracket 2 and extending through the mixing cylinder 1, a stirring device 4 installed on the mounting bracket 2, a driving device 5 for driving the stirring device to rotate, a scraping device 6 provided at the bottom of the stirring device, a material receiving bin 7 provided at the bottom of the mixing cylinder, and a mixing screen 8 installed between the mixing cylinder 1 and the material receiving bin 7.

[0024] The mixing cylinder 1 is a metal cylinder with open ends. The upper end is connected to the mounting bracket 2, and the lower end is connected to the receiving bin 7. The upper and lower end surfaces of the mixing cylinder 1 are respectively provided with an outer edge, and the connection point between the mixing cylinder 1 and the mounting bracket 2 / receiving bin 7 is located at the outer edge.

[0025] The mounting bracket 2 is fixed to the mixing cylinder 1 by bolts. A detachable height-fixing block 9 is provided at the connection between the mounting bracket 2 and the mixing cylinder 1 to adjust the installation height of the mounting bracket. Specifically, the height-fixing block 9 is located between the mixing cylinder 1 and the mounting bracket 2. When the height-fixing block 9 is installed, the installation position of the mounting bracket 2 is raised. When the height-fixing block 9 is removed, the mounting bracket 2 falls and comes into direct contact with the mixing cylinder 1. The installation and removal of the height-fixing block are achieved by adjusting the tightness of the bolts. In order to ensure the installation stability of the mounting bracket 2 and the mixing cylinder 1, the number of connection positions between the mounting bracket 2 and the mixing cylinder 1 is 4-8, and each connection position corresponds to a height-fixing block.

[0026] In the present invention, the thickness of the height-fixing block 9 is 8-12 mm, that is, the mounting bracket 2 can be raised by 8-12 mm or lowered by 8-12 mm.

[0027] In order to prevent the material in the mixing cylinder from overflowing during the mixing process or external dust from entering the mixing cylinder and contaminating the material, in the present invention, the mounting bracket 2 is covered on the mixing cylinder to seal the opening on the upper end surface of the mixing cylinder 1.

[0028] Mounting bracket 2 is provided with a feed inlet 21, and the discharge port of feeding hopper 3 is docked with the feed inlet of the mounting bracket, thereby connecting the feeding hopper and the mixing cylinder. The feeding hopper 3 and the mounting bracket can be secured by bolts, welding, or clamping. To prevent the material in the feeding hopper from spilling out, a hopper cover 31 is preferably provided on the feeding hopper to seal the hopper.

[0029] The stirring device 4 includes a main shaft 41, a bearing 42 and a bearing seat 44 for fixing the main shaft 41 to the mounting bracket 2, and a double-helical stirring blade 43 provided on the main shaft 41. The driving device 5 is used to drive the main shaft to rotate. When the main shaft rotates, the upper spiral stirring blade is driven to rotate, thereby causing the mixed material in the mixing cylinder to flip up and down, achieving mixing.

[0030] The scraper device 6 includes a scraper frame 61 connected to the main shaft 41 and a scraper 62 connected to the scraper frame 61. The scraper frame 61 is located at the bottom end of the main shaft. When the height setting block 9 is installed between the mounting bracket 2 and the mixing barrel 1, the scraper 62 is spaced apart from the mixing screen 8. At this time, the bottom end of the main shaft 41 is 15-20 mm away from the mixing screen. This distance is greater than the thickness of the height setting block, which ensures that the main shaft and the mixing screen do not collide when the mounting bracket falls. The scraper 62 is a rubber scraper. When the height setting block 9 is installed between the mounting bracket 2 and the mixing barrel 1, the scraper and the mixing screen 8 are separated by 3-7 mm. When the height setting block 9 is removed, the scraper 62 contacts the mixing screen 8. Due to its elasticity, the scraper bends at this time, and it is in surface contact with the mixing screen 8. At this time, the drive device drives the active rotation, and the scraper 62 rotates accordingly. The contact surface between the scraper and the mixing screen crushes the powder material, further dispersing the agglomerated powder material.

[0031] In this embodiment, there are three scraping devices 6, which form an angle of 120° between each other, which can prevent the accumulation of powder materials and improve the working efficiency of the mixing device; and can also strengthen the scraper's crushing action on the powder materials and improve the dispersion effect of the powder materials.

[0032] The receiving bin 7 is also fixed to the mixing cylinder 1 by bolts. It is in an inverted cone shape and is provided with a discharge valve 71 at its bottom. The powder material in the mixing cylinder 1 enters the receiving bin 7 through the sieve holes of the mixing screen 8.

[0033] The mixing screen 8 is arranged between the mixing cylinder 1 and the receiving bin 7, and is arranged parallel to the mounting bracket 2. During installation, the bolts connecting the receiving bin 7 and the mixing cylinder 1 pass through the mixing screen at the same time to connect and fix the three. In the present utility model, the mixing screen 8 includes a first mixing screen 81 and a second mixing screen 82. The material passes through the first mixing screen 81 and the second mixing screen 82 in sequence and then enters the receiving bin 7. The sieve aperture of the first mixing screen 81 is smaller than the sieve aperture of the second mixing screen 82. The powder material enters the receiving bin after two-stage screening, and the dispersion effect is better.

[0034] In this embodiment, the first mixing screen 81 is a 200-250 mesh screen, and the second mixing screen 82 is a 10-35 mesh screen.

[0035] The working principle of the powder material mixing device of this utility model is as follows:

[0036] Install the powder material mixing device and set a height-fixing block between the mounting bracket and the mixing cylinder. At this time, the main shaft of the stirring device is 15-20mm away from the mixing screen, and the scraper does not touch the mixing screen.

[0037] The driving device 5 is started to rotate the main shaft 41 of the stirring device, and the double-helix stirring blades 43 rotate accordingly. The mixed material in the feeding bin 3 enters the mixing cylinder 1. Under the stirring action of the double-helix stirring blades 43, the material is turned up and down to achieve mixing; the mixed and dispersed powder material enters the receiving bin 7 through the sieve holes of the mixing screen;

[0038] After the stirring device has been running for a period of time, the driving device is turned off, and the stirring device 4 stops working;

[0039] Remove the height-setting block 9 between the mounting bracket 2 and the mixing cylinder 1 and tighten the bolts to secure the mounting bracket 2 to the mixing cylinder 1. The mounting bracket 2 then drops, directly contacting the mixing cylinder. Correspondingly, the main shaft 41 of the stirring device 4 drops by the height of the height-setting block, and the scraper attached to the main shaft 41 also drops, now contacting the mixing screen. Because the distance between the scraper and the mixing screen is 3-7mm when the height-setting block is installed, the scraper drops to a height equal to the thickness of the height-setting block when the height-setting block is removed. Consequently, the elastic rubber scraper bends and deforms, resulting in surface contact with the mixing screen.

[0040] Restart the drive unit, and the main shaft 41 of the stirring device 4 rotates, driving the double-helix stirring blades 43 and scraper 62 to rotate. The double-helix stirring blades 43 continue to stir the material, while the scraper 62 applies a certain amount of pressure to the material through the contact surface with the mixing screen, crushing the material and dispersing the agglomerated powder material. At this time, the double-helix stirring blades and scraper work together to mix and disperse the powder material.

[0041] The agglomerated materials are dispersed and further dispersed through a two-stage mixing screen before entering the receiving bin.

[0042] The powder material mixing device of this utility model adopts a mixing method that combines stirring with rolling and sieving dispersion, which can reduce powder agglomeration and improve the mixing uniformity of powder materials. The powder material mixing device of this utility model can be used to mix two or more ultrafine and ultralight powder materials.

[0043] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A powder material mixing device, characterized in that: The mixing cylinder comprises a mixing cylinder, a mounting bracket provided on the top of the mixing cylinder, a feeding bin provided on the mounting bracket and communicating with the mixing cylinder, a stirring device installed on the mounting bracket and used to stir the material in the mixing cylinder, a driving device for driving the stirring device to rotate, a scraping device provided at the bottom of the stirring device, a material receiving bin provided at the bottom of the mixing cylinder, and a mixing screen provided between the mixing cylinder and the material receiving bin, wherein the powder material enters the material receiving bin through the sieve holes of the mixing screen; The installation height of the mounting bracket is adjusted by providing a detachable height-fixing block at the connection between the mounting bracket and the mixing cylinder. When the height-fixing block is installed between the mounting bracket and the mixing cylinder, the scraping device and the mixing screen are spaced apart. When the height-fixing block is removed, the mounting bracket falls and the scraping device contacts the mixing screen.

2. The powder material mixing device according to claim 1, characterized in that: The scraper device includes a scraper frame connected to the main shaft of the stirring device and a scraper connected to the scraper frame. When the height-fixing block is installed between the mounting bracket and the mixing cylinder, the scraper and the mixing screen are spaced apart; when the height-fixing block is removed, the scraper contacts the mixing screen.

3. The powder material mixing device according to claim 2, characterized in that: There are three scraping devices, which form an angle of 120 degrees between each other.

4. The powder material mixing device according to claim 2, characterized in that: The thickness of the height-setting block is 8-12 mm, and the scraper is a rubber scraper. When the height-setting block is installed between the mounting bracket and the mixing cylinder, the scraper is spaced 3-7 mm from the mixing screen.

5. The powder material mixing device according to claim 1, characterized in that: The mixing screen includes a first mixing screen and a second mixing screen. The aperture of the first mixing screen is smaller than the aperture of the second mixing screen. The material enters the material receiving bin after passing through the first mixing screen and the second mixing screen in sequence.

6. The powder material mixing device according to claim 5, characterized in that: The first mixing screen is a screen with a mesh size of 200-250, and the second mixing screen is a screen with a mesh size of 10-35.

7. The powder material mixing device according to claim 1, characterized in that: The stirring device includes a main shaft, a bearing and a bearing seat for fixing the main shaft to the mounting bracket, and a double-helix stirring blade provided on the main shaft. The lowest end of the main shaft is 15-20 mm away from the mixing screen.

8. The powder material mixing device according to claim 1, characterized in that: The mixing cylinder and the mounting bracket are fixed by bolt connection, and the number of connection positions between the two is 4-8, and each connection position corresponds to a height-fixing block.

9. The powder material mixing device according to claim 1, characterized in that: The feeding bin is provided with a bin cover, and the mounting bracket seals the mixing cylinder.

10. The powder material mixing device according to claim 1, characterized in that: The material receiving bin is in an inverted cone shape, and a discharge valve is provided at the bottom thereof.

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