Adjustable mixing device

Abstract

The utility model belongs to the technical field of mechanical equipment, and particularly relates to an adjustable mixing device. The device comprises a large-particle grinding mixer, a small-particle mixing grinder and a material collecting box, an outlet of the large-particle grinding mixer is connected with an inlet of the small-particle mixing grinder through a first material conveying bag, and an outlet of the small-particle mixing grinder is connected with an inlet of the material collecting box through a second material conveying bag. And a vacuum suction pipe is arranged at the bottom of the collection box. A full-automatic multi-stage screening structure is adopted, various materials with different particle sizes can be classified and guided out in a multi-stage mode, the labor intensity of workers is greatly reduced, different screening hole diameters can be manufactured according to requirements, fine screening of multiple materials is achieved, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment and relates to an adjustable mixing device. Background Art

[0002] The mixer is used to stir the materials, so that the materials are constantly separated and turned over during the mixing process to achieve the purpose of mixing. The vibrating screen is used to screen the material particles. At present, in the geology, metallurgy, chemical industry, construction, coal, cement and other industries, such machines are needed to stir and screen the materials. During the use of the existing mixing and screening equipment, it is difficult to classify and export materials of various particle sizes in multiple levels. During the vibration process, materials of different particles are easily exported to mismatched classification areas. The screening accuracy is relatively general and the manual labor intensity is high. Therefore, it is urgent to design an adjustable mixing device that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a mixer [application number: 201810456771.X], which includes: a base, which includes a horizontally arranged bottom plate and a first hydraulic telescopic rod, a second hydraulic telescopic rod, and a third hydraulic telescopic rod arranged vertically on the bottom plate at equal intervals; a mixing barrel, which is axially horizontally arranged above the base; a synchronous coupling, which is horizontally arranged on the first hydraulic telescopic rod; a pair of stirring rods, which are horizontally arranged side by side parallel to the axial direction of the mixing barrel; a first feed hopper, which is arranged above the mixing barrel near the synchronous coupling; a second feed hopper, which is arranged above the mixing barrel near the first feed hopper; a discharge port, which is opened on the side wall of the mixing barrel; wherein the synchronous coupling is driven by a driving device. Summary of the invention

[0004] The purpose of the utility model is to provide an adjustable mixing device in view of the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An adjustable mixing device comprises a large particle grinding mixer, a small particle mixing grinder and an aggregate box, wherein the outlet of the large particle grinding mixer is connected to the inlet of the small particle mixing grinder via a first feed bag, and the outlet of the small particle mixing grinder is connected to the inlet of the aggregate box via a second feed bag. A vacuum suction pipe is provided at the bottom of the aggregate box, and a particle screening frame is connected to the outlet of the vacuum suction pipe. A vibrator is provided at the bottom of the particle screening frame, and the vibrator and the particle screening frame are connected via an elastic connecting piece. A primary classification screening mechanism and a secondary classification screening mechanism for rotatable material discharge are provided in the particle screening frame, and the primary classification screening mechanism is located above the secondary classification screening mechanism. A detachable bottom supporting member is provided at the bottom of the particle screening frame.

[0007] In the above-mentioned adjustable mixing device, the first-level classification screening mechanism includes a first-level screening frame plate arranged in the particle screening frame, the first-level screening frame plate is provided with a plurality of first-level sieve holes, a first discharge piece is provided on the right side of the first-level screening frame plate, the right end of the first-level screening frame plate is connected to the particle screening frame through a rotating shaft, the left end of the first-level screening frame plate extends into the cavity in the particle screening frame and the left end of the first-level screening frame plate is lifted up and down by a first linear drive.

[0008] In the above-mentioned adjustable mixing device, the power shaft of the first linear drive is hinged to the left end of the first-stage screening frame plate, and a first downward pressing fixing member that can reciprocate linearly in the horizontal direction is provided in the particle screening frame, and the first downward pressing fixing member is against the first-stage screening frame plate.

[0009] In the above-mentioned adjustable mixing device, the first downward pressing fixing member includes a first downward pressing fixing plate arranged in the particle screening frame, the bottom of the first downward pressing fixing plate is abutted against the top side of the left end of the first-level screening frame plate, and the first downward pressing fixing plate is driven by a linear motor.

[0010] In the above-mentioned adjustable mixing device, the first discharging member includes a first discharging bracket arranged on the right side of the first-level screening frame plate, the first discharging bracket has a first discharging channel arranged obliquely, and the first discharging bracket is provided with a first baffle which can reciprocate in a straight line in a vertical direction, and the first baffle is driven by a linear motor.

[0011] In the above-mentioned adjustable mixing device, the secondary classification screening mechanism includes a secondary screening frame plate arranged in the particle screening frame, the secondary screening frame plate is provided with a plurality of secondary sieve holes, the aperture of the secondary sieve holes is smaller than the aperture of the primary sieve holes, the secondary screening frame plate is located below the primary screening frame plate, a second discharge piece is provided on the left side of the secondary screening frame plate, the left end of the secondary screening frame plate is connected to the particle screening frame by a rotating shaft, the right end of the secondary screening frame plate extends into the cavity in the particle screening frame and the right end of the secondary screening frame plate is lifted up and down by a second linear drive.

[0012] In the above-mentioned adjustable mixing device, the power shaft of the second linear drive is hinged to the right end of the secondary screening frame plate, and a second downward pressing fixing member that can reciprocate linearly in the horizontal direction is provided in the particle screening frame, and the second downward pressing fixing member is against the secondary screening frame plate.

[0013] In the above-mentioned adjustable mixing device, the second downward pressing fixing member includes a second downward pressing fixing plate arranged in the particle screening frame, the bottom of the second downward pressing fixing plate is abutted against the top side of the right end of the secondary screening frame plate, and the second downward pressing fixing plate is driven by a linear motor.

[0014] In the above-mentioned adjustable mixing device, the second discharging member includes a second discharging bracket arranged on the left side of the secondary screening frame plate, the second discharging bracket has a second discharging channel arranged obliquely, and the second discharging bracket is provided with a second baffle which can reciprocate in a vertical direction, and the second baffle is driven by a linear motor.

[0015] In the above-mentioned adjustable mixing device, the detachable bottom supporting member includes a screw-connected supporting plate arranged at the bottom of the particle screening frame, and the screw-connected supporting plate is fixed to the particle screening frame by screws.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The utility model adopts a fully automated multi-stage screening structure, which can classify and export materials of various particle sizes in multiple stages, greatly reducing the labor intensity. Different screening apertures can also be made according to needs to achieve subdivided screening of multiple materials, and is highly practical.

[0018] 2. In the process of up and down vibration, the utility model presses the left end top side of the first-level screening frame plate against each other through the first pressing and fixing plate to prevent the first-level screening frame plate from shaking up and down during the screening process, and presses the right end top side of the second-level screening frame plate against each other through the second pressing and fixing plate to prevent the second-level screening frame plate from shaking up and down during the screening process, which has strong stability and improved service life.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a cross-sectional schematic diagram of a particle screen rack.

[0022] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0023] Figure 4 yes Figure 2 A magnified schematic diagram of point B in the middle.

[0024] In the figure: a large particle grinding and mixing machine 1, a small particle mixing and grinding machine 2, a collecting box 3, a first feed bag 4, a second feed bag 5, a vacuum suction pipe 6, a particle screening frame 7, a vibrating machine 8, an elastic connecting member 9, a primary classification screening mechanism 10, a secondary classification screening mechanism 11, a detachable bottom supporting member 12, a primary screening frame plate 13, a primary sieve hole 14, a first discharging member 15, a first linear drive 151, a first downward pressing fixing member 152, a first downward pressing fixing plate 16, a first discharging bracket 17, a first discharging channel 18, a first baffle 19, a secondary screening frame plate 20, a secondary sieve hole 21, a second discharging member 22, a second linear drive 23, a second downward pressing fixing member 24, a second downward pressing fixing plate 25, a second discharging bracket 26, a second discharging channel 27, a second baffle 28, and a screw-connected supporting plate 29. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-4 As shown, an adjustable mixing device includes a large particle grinding mixer 1, a small particle mixing grinder 2 and an aggregate box 3, wherein the outlet of the large particle grinding mixer 1 is connected to the inlet of the small particle mixing grinder 2 via a first feed bag 4, and the outlet of the small particle mixing grinder 2 is connected to the inlet of the aggregate box 3 via a second feed bag 5. A vacuum suction pipe 6 is provided at the bottom of the aggregate box 3, and a particle screening frame 7 is connected to the outlet of the vacuum suction pipe 6. A vibrator 8 is provided at the bottom of the particle screening frame 7, and the vibrator 8 is connected to the particle screening frame 7 via an elastic connector 9. A primary classification screening mechanism 10 and a secondary classification screening mechanism 11 for rotatable material discharge are provided in the particle screening frame 7, and the primary classification screening mechanism 10 is located above the secondary classification screening mechanism 11, and a detachable bottom support member 12 is provided at the bottom of the particle screening frame 7.

[0027] In this embodiment, a variety of materials to be mixed and ground are put into a large particle grinding and mixing machine 1, and the large particle grinding and mixing machine 1 first performs preliminary mixing and grinding on the materials. After the grinding is completed, the materials are sent to a small particle mixing and grinding machine 2 for secondary mixing and grinding. The materials are fully ground and sent to a collecting box 3. The ground and mixed materials are sucked into a particle screening frame 7 through a vacuum suction pipe 6. At this time, a vibrator 8 is started, and the particle screening frame 7 is vibrated up and down by the vibrator 8 in conjunction with an elastic connecting piece 9. The materials will first be screened at a primary classification screening mechanism 10, and large particles of materials will be left at the primary classification screening mechanism 10. Smaller particles of materials will pass through the primary classification screening mechanism 10 and enter the secondary classification screening below. Mechanism 11, the material is screened twice by the secondary classification screening mechanism 11, the finest and smallest particles are kept at the detachable bottom support 12 through the secondary classification screening mechanism 11, the large particle material is screened by the primary classification screening mechanism 10 and then discharged from the outlet of the primary classification screening mechanism 10, the smaller particle material is screened by the secondary classification screening mechanism 11 and then discharged from the outlet of the secondary classification screening mechanism 11, the finest and smallest particles can be cleaned and processed by opening the detachable bottom support 12, and a fully automated multi-stage screening structure is adopted, so that materials of various particle sizes can be classified and discharged in multiple stages, which greatly reduces the labor intensity, and different screening apertures can be made according to needs to realize subdivided screening of multiple materials, which is highly practical;

[0028] The elastic connecting member 9 is composed of a spring. The large particle grinding and mixing machine 1 and the small particle mixing and grinding machine 2 are commercially available products and are not the focus of this patent, so their internal structures and working principles will not be described in detail.

[0029] Combination Figure 1-4 As shown, the first-level classification screening mechanism 10 includes a first-level screening frame plate 13 arranged in the particle screening frame 7, and a plurality of first-level sieve holes 14 are provided in the first-level screening frame plate 13. A first discharge piece 15 is provided on the right side of the first-level screening frame plate 13. The right end of the first-level screening frame plate 13 is connected to the particle screening frame 7 through a rotating shaft, and the left end of the first-level screening frame plate 13 extends into the cavity in the particle screening frame 7 and the left end of the first-level screening frame plate 13 is lifted up and down by a first linear drive 151.

[0030] Specifically, the ground and mixed materials are drawn into the particle screening frame 7 through the vacuum suction pipe 6, and the vibrator 8 is started at this time. The particle screening frame 7 is vibrated up and down by the vibrator 8 and the elastic connecting piece 9. The material will be screened at the first-level screening frame plate 13 first, and the large particles of material will be left at the first-level screening frame plate 13. The smaller particles of material will pass through the first-level sieve hole 14 and enter the second-level classification screening mechanism 11 below. After the screening is completed, the first linear drive 151 is started, and the left end of the first-level screening frame plate 13 is driven to rise by the first linear drive 151, so that the first-level screening frame plate 13 is tilted, and the large particles of material are poured into the first discharging piece 15 for discharging.

[0031] Combination Figure 3 , Figure 4 As shown, the power shaft of the first linear drive 151 is hinged to the left end of the primary screening frame plate 13, and a first downward pressing fixing member 152 which can reciprocate linearly in the horizontal direction is provided in the particle screening frame 7, and the first downward pressing fixing member 152 is against the primary screening frame plate 13.

[0032] In this embodiment, during the up and down vibration process, the left end of the first-stage screening frame plate 13 is pressed against and tightened by the first pressing fixing member 152 to prevent the first-stage screening frame plate 13 from shaking up and down during the screening process, thereby improving stability and increasing service life.

[0033] The first downward pressing fixing member 152 includes a first downward pressing fixing plate 16 arranged in the particle screening frame 7, the bottom of the first downward pressing fixing plate 16 abuts against the top side of the left end of the primary screening frame plate 13, and the first downward pressing fixing plate 16 is driven by a linear motor.

[0034] In this embodiment, during the up and down vibration process, the first downward pressing fixed plate 16 is used to press the top side of the left end of the first-level screening frame plate 13 against each other, so as to prevent the first-level screening frame plate 13 from shaking up and down during the screening process. The stability is strong and the service life is improved. The first downward pressing fixed plate 16 is driven by a linear motor and has a high degree of automation.

[0035] Combination Figure 2 As shown, the first discharging member 15 includes a first discharging bracket 17 arranged on the right side of the first-level screening frame plate 13, and the first discharging bracket 17 has a first discharging channel 18 arranged obliquely therein, and the first discharging bracket 17 is provided with a first baffle 19 which can reciprocate linearly in the vertical direction, and the first baffle 19 is driven by a linear motor.

[0036] In this embodiment, after the screening is completed, the first-level screening frame 13 is tilted, and the first baffle 19 is moved up to open the first discharge channel 18, and the large particle material is discharged through the first discharge channel 18 of the first discharge bracket 17. When screening, the first baffle 19 blocks the first discharge channel 18 to prevent the material from being discharged from the first discharge channel 18 before the screening is completed.

[0037] The secondary classification screening mechanism 11 includes a secondary screening frame plate 20 arranged in the particle screening frame 7, and a plurality of secondary sieve holes 21 are provided in the secondary screening frame plate 20, and the aperture of the secondary sieve hole 21 is smaller than the aperture of the primary sieve hole 14. The secondary screening frame plate 20 is located below the primary screening frame plate 13, and a second discharge piece 22 is provided on the left side of the secondary screening frame plate 20. The left end of the secondary screening frame plate 20 is connected to the particle screening frame 7 through a rotating shaft, and the right end of the secondary screening frame plate 20 extends into the cavity in the particle screening frame 7 and the right end of the secondary screening frame plate 20 is lifted up and down by a second linear drive 23.

[0038] In this embodiment, smaller particles of material will pass through the primary sieve hole 14 into the secondary sieve frame plate 20 below, and the material will be screened for the second time by the secondary sieve frame plate 20, and the finest and smallest particles will pass through the secondary sieve hole 21 and stay on the detachable bottom support member 12. After the secondary screening is completed, the second linear drive 23 is started, and the right end of the secondary sieve frame plate 20 is driven by the power shaft of the second linear drive 23 to lift up, and the right end of the secondary sieve frame plate 20 is tilted, and the smaller particles of material will be poured into the second discharge member 22 for discharge.

[0039] The power shaft of the second linear drive 23 is hinged to the right end of the secondary screening frame plate 20 , and a second pressing fixing member 24 capable of reciprocating linear motion in the horizontal direction is provided in the particle screening frame 7 , and the second pressing fixing member 24 abuts against the secondary screening frame plate 20 .

[0040] In this embodiment, during the up and down vibration process, the right end of the secondary screening frame plate 20 is pressed against and tightened by the second pressing fixing member 24 to prevent the secondary screening frame plate 20 from shaking up and down during the screening process, thereby improving stability and increasing service life.

[0041] Combination Figure 2 As shown, the second downward pressing fixing member 24 includes a second downward pressing fixing plate 25 arranged in the particle screening frame 7, the bottom of the second downward pressing fixing plate 25 is abutted against the top side of the right end of the secondary screening frame plate 20, and the second downward pressing fixing plate 25 is driven by a linear motor.

[0042] In this embodiment, during the up and down vibration process, the second downward pressing fixing plate 25 is used to press the top side of the right end of the secondary screening frame plate 20 to prevent the secondary screening frame plate 20 from shaking up and down during the screening process. The stability is strong and the service life is improved. The second downward pressing fixing plate 25 is driven by a linear motor and has a high degree of automation.

[0043] Combination Figure 1 , Figure 2 As shown, the second discharging member 22 includes a second discharging bracket 26 arranged on the left side of the secondary screening frame plate 20, and the second discharging bracket 26 has an inclined second discharging channel 27, and the second discharging bracket 26 is provided with a second baffle 28 which can reciprocate in a vertical direction, and the second baffle 28 is driven by a linear motor.

[0044] In this embodiment, after the screening is completed, the secondary screening frame 20 is tilted, and the second baffle 28 is moved up to open the second discharge channel 27, and the smaller particle material is discharged through the second discharge channel 27 of the second discharge bracket 26. When screening, the second baffle 28 blocks the second discharge channel 27 to prevent the material from being discharged from the second discharge channel 27 before the screening is completed.

[0045] Combination Figure 2 As shown, the detachable bottom supporting member 12 includes a screw-connected supporting plate 29 disposed at the bottom of the particle screening frame 7, and the screw-connected supporting plate 29 is fixed to the particle screening frame 7 by screws.

[0046] In this embodiment, the finest and smallest particles can be cleaned by opening the screw-connected support plate 29. The screw-connected support plate 29 is fixed to the particle screening frame 7 by screws, and the disassembly and assembly are simple and convenient.

[0047] The working principle of the utility model is:

[0048] A variety of materials to be mixed and ground are put into the large particle grinding and mixing machine 1, and the materials are first mixed and ground by the large particle grinding and mixing machine 1. After the grinding is completed, the materials are sent to the small particle mixing and grinding machine 2 for secondary mixing and grinding. The materials are fully ground and sent to the collection box 3.

[0049] The ground and mixed materials are drawn into the particle screening frame 7 through the vacuum suction pipe 6. At this time, the vibrator 8 is started, and the particle screening frame 7 is vibrated up and down by the vibrator 8 and the elastic connecting piece 9. The materials will be screened at the first-level screening frame plate 13 first, and the large particles of materials will be left at the first-level screening frame plate 13. The smaller particles of materials will pass through the first-level sieve holes 14 and enter the second-level classification screening mechanism 11 below. After the screening is completed, the first linear drive 151 is started, and the left end of the first-level screening frame plate 13 is driven to lift through the first linear drive 151, so that the first-level screening frame plate 13 is tilted, and the large particles of materials are dumped into the first discharging piece 15 for discharging.

[0050] During the up and down vibration process, the left end top side of the first-level screening frame plate 13 is pressed against each other by the first pressing and fixing plate 16, so as to prevent the first-level screening frame plate 13 from shaking up and down during the screening process, and the stability is strong, and the service life is improved. The first pressing and fixing plate 16 is driven by a linear motor, and the degree of automation is high.

[0051] After the screening is completed, the primary screening frame 13 is tilted, and the first baffle 19 is moved up to open the first discharge channel 18, and the large particles are discharged through the first discharge channel 18 of the first discharge bracket 17. When screening, the first baffle 19 blocks the first discharge channel 18 to prevent the material from being discharged from the first discharge channel 18 before the screening is completed.

[0052] The material with smaller particles will pass through the primary sieve hole 14 and enter the secondary sieve frame plate 20 below. The material will be screened for the second time through the secondary sieve frame plate 20, and the finest and smallest particles will pass through the secondary sieve hole 21 and stay at the detachable bottom support member 12. After the secondary screening is completed, the second linear drive 23 is started, and the power shaft of the second linear drive 23 drives the right end of the secondary sieve frame plate 20 to lift upward, and the right end of the secondary sieve frame plate 20 is tilted, and the material with smaller particles will be dumped to the second discharging member 22 for discharging.

[0053] During the up and down vibration process, the second pressing and fixing plate 25 is used to press the top side of the right end of the secondary screening frame plate 20 to prevent the secondary screening frame plate 20 from shaking up and down during the screening process. The stability is strong and the service life is improved. The second pressing and fixing plate 25 is driven by a linear motor and has a high degree of automation.

[0054] After the screening is completed, the secondary screening frame 20 is tilted, and the second baffle 28 is moved up to open the second discharge channel 27, and the smaller particles are discharged through the second discharge channel 27 of the second discharge bracket 26. When screening, the second baffle 28 blocks the second discharge channel 27 to prevent the material from being discharged from the second discharge channel 27 before the screening is completed.

[0055] The finest and smallest particles can be cleaned by opening the screwed support plate 29. The screwed support plate 29 and the particle screening frame 7 are fixed by screws, and the disassembly and assembly are simple and convenient. The fully automated multi-stage screening structure can be used to classify and export materials of various particle sizes in multiple stages, which greatly reduces the labor intensity. Different screening apertures can also be made according to needs to achieve subdivided screening of multiple materials, and it is very practical.

[0056] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0057] Although this article uses more terms such as large particle grinding and mixing machine 1, small particle mixing and grinding machine 2, collecting box 3, first feed bag 4, second feed bag 5, vacuum suction pipe 6, particle screening frame 7, vibrating machine 8, elastic connecting part 9, primary classification screening mechanism 10, secondary classification screening mechanism 11, detachable bottom supporting part 12, primary screening frame plate 13, primary sieve hole 14, first discharging part 15, first linear drive 151, first downward pressing fixing part 152, first downward pressing fixing plate 16, first discharging bracket 17, first discharging channel 18, first baffle 19, secondary screening frame plate 20, secondary sieve hole 21, second discharging part 22, second linear drive 23, second downward pressing fixing part 24, second downward pressing fixing plate 25, second discharging bracket 26, second discharging channel 27, second baffle 28, screwed supporting plate 29, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention. Any additional limitations construed by them are contrary to the spirit of the present invention.

Claims

1. An adjustable mixing device, comprising a large particle grinding mixer (1), a small particle mixing grinder (2) and a collection box (3), wherein the outlet of the large particle grinding mixer (1) is connected to the inlet of the small particle mixing grinder (2) via a first feed bag (4), and the outlet of the small particle mixing grinder (2) is connected to the inlet of the collection box (3) via a second feed bag (5), characterized in that: A vacuum suction pipe (6) is provided at the bottom of the collecting box (3), and a particle screening frame (7) is connected to the outlet of the vacuum suction pipe (6). A vibrator (8) is provided at the bottom of the particle screening frame (7). The vibrator (8) and the particle screening frame (7) are connected via an elastic connecting piece (9). A primary classification screening mechanism (10) and a secondary classification screening mechanism (11) for rotatable material discharge are provided in the particle screening frame (7). The primary classification screening mechanism (10) is located above the secondary classification screening mechanism (11), and a detachable bottom supporting member (12) is provided at the bottom of the particle screening frame (7).

2. The adjustable mixing device according to claim 1, characterized in that: The primary classification screening mechanism (10) comprises a primary screening frame plate (13) arranged in a particle screening frame (7), a plurality of primary screening holes (14) being arranged in the primary screening frame plate (13), a first material discharging member (15) being arranged on the right side of the primary screening frame plate (13), the right end of the primary screening frame plate (13) being connected to the particle screening frame (7) via a rotating shaft, the left end of the primary screening frame plate (13) extending into a cavity in the particle screening frame (7), and the left end of the primary screening frame plate (13) being lifted up and down by a first linear drive (151).

3. The adjustable mixing device according to claim 2, characterized in that: The power shaft of the first linear drive (151) is hinged to the left end of the primary screening frame plate (13), and a first downward pressing fixing member (152) capable of reciprocating linear motion in the horizontal direction is provided in the particle screening frame (7), and the first downward pressing fixing member (152) is in contact with the primary screening frame plate (13).

4. The adjustable mixing device according to claim 3, characterized in that: The first downward pressing fixing member (152) comprises a first downward pressing fixing plate (16) arranged in the particle screening frame (7), the bottom of the first downward pressing fixing plate (16) abuts against the top side of the left end of the primary screening frame plate (13), and the first downward pressing fixing plate (16) is driven by a linear motor.

5. The adjustable mixing device according to claim 4, characterized in that: The first discharging member (15) comprises a first discharging bracket (17) arranged on the right side of the primary screening frame plate (13), the first discharging bracket (17) having a first discharging channel (18) arranged obliquely therein, the first discharging bracket (17) having a first baffle plate (19) capable of reciprocating linear motion in a vertical direction, the first baffle plate (19) being driven by a linear motor.

6. The adjustable mixing device according to claim 5, characterized in that: The secondary classification screening mechanism (11) comprises a secondary screening frame plate (20) arranged in the particle screening frame (7), a plurality of secondary screening holes (21) are arranged in the secondary screening frame plate (20), the aperture of the secondary screening holes (21) is smaller than the aperture of the primary screening holes (14), the secondary screening frame plate (20) is located below the primary screening frame plate (13), a second material discharging member (22) is arranged on the left side of the secondary screening frame plate (20), the left end of the secondary screening frame plate (20) is connected to the particle screening frame (7) via a rotating shaft, the right end of the secondary screening frame plate (20) extends into the cavity in the particle screening frame (7), and the right end of the secondary screening frame plate (20) is lifted up and down by a second linear drive (23).

7. The adjustable mixing device according to claim 6, characterized in that: The power shaft of the second linear drive (23) is hinged to the right end of the secondary screening frame plate (20), and a second downward pressing fixing member (24) capable of reciprocating linear motion in the horizontal direction is provided in the particle screening frame (7), and the second downward pressing fixing member (24) is in contact with the secondary screening frame plate (20).

8. The adjustable mixing device according to claim 7, characterized in that: The second downward pressing fixing member (24) comprises a second downward pressing fixing plate (25) arranged in the particle screening frame (7), the bottom of the second downward pressing fixing plate (25) abuts against the top side of the right end of the secondary screening frame plate (20), and the second downward pressing fixing plate (25) is driven by a linear motor.

9. The adjustable mixing device according to claim 8, characterized in that: The second discharge member (22) comprises a second discharge bracket (26) arranged on the left side of the secondary screening frame plate (20), the second discharge bracket (26) having an inclined second discharge channel (27), the second discharge bracket (26) having a second baffle (28) capable of reciprocating linear motion in a vertical direction, the second baffle (28) being driven by a linear motor.

10. The adjustable mixing device according to claim 9, characterized in that: The detachable bottom supporting member (12) comprises a screw-connected supporting plate (29) arranged at the bottom of the particle screening frame (7), and the screw-connected supporting plate (29) and the particle screening frame (7) are fixed by screws.

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