Pneumatic and mechanical multifunctional composite mixer for powdery materials

Abstract

The utility model belongs to the technical field of material mixing equipment, and particularly relates to a pneumatic and mechanical multifunctional composite mixer for powdery materials. Comprising a mixer box, and a feeding port is formed in the upper portion or the side face of the mixer box. The lifting device is mounted in the mixer box body and is used for circularly conveying powder up and down; the stirring device is arranged at the upper part in the mixer box body and is used for stirring the materials; the aeration box is located at the bottom of the mixer box body, breathable cloth is arranged on the upper side of the aeration box, and a fan supplies air to the aeration box; the main pipeline and the branch pipeline are used for connecting the aeration tank and the fan; the lower discharging opening is formed in the bottom of the mixer box body, and the side discharging opening is formed in the upper portion of one side of the mixer box body and is controlled by a spiral gate and a pneumatic arc-shaped valve. The utility model solves the problems of large dynamic metering fluctuation and unstable material quality of a pneumatic and mechanical composite mixer for powdery materials, and the problems of high energy consumption, large abrasion and unsuitability for mixing of a large amount of materials of a mechanical mixer.

Description

Technical Field

[0001] This utility model belongs to the technical field of material mixing equipment, specifically a multi-functional composite mixer for powdered materials that combines pneumatic and mechanical mixing. Background Technology

[0002] In the field of powder material mixing, existing mixing equipment has its own characteristics, but also has some shortcomings.

[0003] Utility model application ZL201220615943.1 discloses a pneumatic and mechanical composite mixer for powdered materials. This mixer cleverly utilizes the combined action of pneumatic and mechanical stirring to achieve uniform composition of different powdered materials entering the mixing chamber. It also boasts significant energy-saving advantages, saving over 60% on electricity, with relatively low power and equipment consumption. However, this utility model is an online mixing device suitable for dynamic metering, with a relatively small chamber volume, limiting the amount of powder that can be mixed online. When fluctuations occur in the feed rate, the material quality will fluctuate accordingly, making it difficult to guarantee stable mixing quality.

[0004] Existing quantitative mechanical mixers, due to their static metering method, offer relatively higher metering accuracy and can adapt to mixing various materials. However, these mixers suffer from high energy consumption and significant wear on mechanical parts, leading to a substantial increase in operating costs. Furthermore, due to limitations in power consumption and wear, the mixing tank volume cannot be designed to be too large, making them unsuitable for applications requiring large mixing volumes.

[0005] Patent CN201420367848.3 discloses a mixing device for powdery materials. This device primarily relies on a specific stirring structure to achieve material mixing. While it can mix powdery materials to a certain extent, it has limitations in mixing efficiency and homogenization. The design of its stirring structure may not ensure uniform mixing at all levels and in all corners, and the mixing effect may be less than ideal for powdery materials with poor flowability or significant density differences. Furthermore, this device lacks sufficient flexibility and adaptability when dealing with different feed rates and mixing modes, making it difficult to meet diverse production needs.

[0006] In summary, there is an urgent need for a mixing device that can effectively solve the aforementioned problems, ensuring the stability and uniformity of material mixing, adapting to different mixing volumes and production modes, and reducing energy consumption and wear. The pneumatic and mechanical multi-functional composite mixer for powdered materials provided in this invention was developed precisely to address these issues. Summary of the Invention

[0007] To address the problems of large dynamic metering fluctuations and unstable material quality in existing pneumatic and mechanical composite mixers for powdered materials, and the high energy consumption and wear of mechanical mixers making them unsuitable for mixing large quantities of materials, this invention provides a multi-functional pneumatic and mechanical composite mixer for powdered materials.

[0008] This utility model adopts the following technical solution: a multi-functional composite mixer for powdered materials, combining pneumatic and mechanical processes, comprising:

[0009] The mixing machine housing has a feed inlet located on the top or side of the mixing machine housing;

[0010] The lifting device is installed inside the mixer housing and is used for vertically circulating powder conveying.

[0011] A stirring device is located in the upper part of the mixing machine box and is used to stir the materials.

[0012] The air inflator is located at the bottom of the mixer housing. A breathable cloth is installed on the upper side of the air inflator, and air is supplied by a blower.

[0013] Main and branch pipes are used to connect the inflation box and the blower;

[0014] The bottom discharge port and the side discharge port are located at the bottom of the mixer housing and at the upper part of one side of the mixer housing, respectively controlled by a spiral gate and a pneumatic arc valve.

[0015] The air box includes:

[0016] The air distribution chambers are evenly distributed inside the inflation box. The lower part of the air distribution chamber is the air inlet, and the air inlet is equipped with an air distribution chamber baffle above the air inlet. The air distribution chambers evenly distribute airflow through the air inlet. The upper part of the inflation box is equipped with reinforcing ribs.

[0017] The lifting device includes a chain, sprockets, scrapers, guide rails, and a lifting equipment transmission device. The guide rails are arranged vertically, the sprockets are located at the upper and lower ends of the guide rails, the chain is installed between the sprockets at both ends, and multiple scrapers are installed on the chain at intervals. The sprockets are driven by the lifting equipment transmission device.

[0018] The lower sprocket is mounted on the tail shaft, and the end of the tail shaft is mounted on the tailstock; the upper sprocket is mounted on the head shaft.

[0019] The head shaft is mounted on tension bearing seats at both ends and is driven by the lifting equipment transmission device.

[0020] The scraper surface is evenly perforated and reinforced with ribs to break up powder and reduce lifting resistance.

[0021] The stirring device includes a stirring shaft, stirring blades, stirring transmission device, and sealing box;

[0022] The stirring blades are mounted on the stirring shaft, and the surface of the stirring blades is evenly distributed with holes to enhance the mixing effect.

[0023] One end of the stirring shaft passes through the outer wall of the mixer housing and is connected to the stirring transmission device, while the other end passes through the outer wall of the mixer housing and is fixed to the stirring bearing seat. A sealing box is provided at the connection position between the stirring shaft and the outer wall of the mixer housing for sealing.

[0024] The inner layer of rolled felt is symmetrically arranged on both sides of the sealing box and is fitted onto the stirring shaft. The inner layer of rolled felt is fitted with retaining rings on both sides. The retaining rings are pressed by a top screw on one side of the sealing box inside the mixer housing. The outer layer of packing and a pressure flange are fitted onto the stirring shaft on the other side of the sealing box.

[0025] Small air boxes or air rods are installed at the four corners of the bottom of the mixing machine to eliminate dead corners during unloading.

[0026] Supports two mixing modes:

[0027] Quantitative mixing mode: Close the pneumatic arc valve, feed after static metering, and empty the box after mixing;

[0028] Continuous mixing mode: Dynamic metering feeding, continuous feeding and discharging.

[0029] The top of the mixing machine box is equipped with a dust removal port and an observation port.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Significantly improved mixing uniformity: The bottom air-filled box air-distribution chamber structure combined with the breathable cloth allows the powder to be fully fluidized; the scraper lifting device circulates the material through the multi-hole scraper, breaking the laminar flow state; the opening on the surface of the stirring blade forms a shearing airflow. Under the synergy of the three effects, the powder is mixed in three dimensions, and the homogenization efficiency is improved compared with the single mechanical or pneumatic mode.

[0032] Dual-mode flexible adaptation to production needs: Supports quantitative mixing mode (static precise metering, stable batch quality) and continuous mixing mode (dynamic continuous feeding, 200% increase in capacity), meeting diverse production scenarios and filling market gaps.

[0033] Energy consumption and wear are optimized: the pneumatic system reduces the mechanical mixing load, saving more than 50% energy compared to a purely mechanical mixer; the multi-hole design of the scraper reduces running resistance, and the sealing box adopts a double seal of rolled felt and packing, extending the bearing life by 3 times.

[0034] Large capacity and no dead angle mixing: The four corners of the bottom of the box are inclined with air rods, which, together with the air distribution chamber baffle, optimize the airflow distribution, eliminate dead angles of material accumulation, and the single unit volume can reach 5 times that of traditional equipment, and the unloading residue rate is <0.2%.

[0035] Enhanced structural reliability: The design of reinforcing ribs in the air box and baffle plates in the air distribution chamber improves the resistance to deformation, while the scraper guide rail-sprocket system ensures stable operation under heavy loads, reducing the failure rate of the equipment during continuous operation to below 0.5%.

[0036] This invention breaks through the technical bottleneck of traditional mixing equipment, and has the characteristics of high precision, low energy consumption and large capacity. It can be widely used in powder mixing processes in building materials, chemical industry, food and other fields, and has significant economic benefits and industry promotion value. Attached Figure Description

[0037] Figure 1 This is a front view schematic diagram of the present invention;

[0038] Figure 2 This is a side view of the present invention;

[0039] Figure 3 This is a top view of the present invention;

[0040] Figure 4 This is a schematic diagram of a reinforced air tank;

[0041] Figure 5 This is a schematic diagram of the scraper of the lifting equipment;

[0042] Figure 6 This is a schematic diagram of the sealing of the stirring device;

[0043] In the diagram: 1-Mixer housing, 2-Feed inlet, 3-Chain, 4-Sprocket, 5-Scraper, 6-Dust removal port, 7-Head shaft, 8-Observation port, 9-Air filling box, 10-Roots blower, 11-Main air duct, 12-Lower discharge port, 13-Screw gate, 14-Branch air duct, 15-Pneumatic arc switch valve, 16-Agitator bearing seat, 17-Sealing box, 18-Agitator shaft, 19-Agitator blades, 20-Lifting equipment transmission device, 21-Tension bearing seat, 22-Agitator transmission device, 23-Guide rail, 24-Tail wheel, 25-Tail shaft, 26-Tail seat, 27-Side discharge port, 28-Air filling box breathable cloth, 29-Air filling box reinforcing rib plate, 30-Air distribution chamber baffle plate, 31-Air distribution chamber, 32-Air inlet. 33-Scraper hole, 34-Scraper reinforcing rib, 35-Pressure flange, 36-Packing, 37-Rolled felt, 38-Stabilizing ring, 39-Top screw, 40-Inflation box or inflation rod. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] like Figure 1 , 2 As shown, a multi-functional pneumatic and mechanical compound mixer for powdered materials includes:

[0046] Mixer housing 1, with a feed inlet 2 provided on the upper part or side of mixer housing 1;

[0047] The lifting device is installed inside the mixer housing 1 and is used for vertically circulating conveying of powder.

[0048] A stirring device is installed in the upper part of the mixing machine box 1 and is used to stir the materials;

[0049] An air-filled box 9 is located at the bottom of the mixing machine housing 1. A breathable cloth 28 is installed on the upper side of the air-filled box 9, and air is supplied by a blower 10.

[0050] The main pipe 11 and the branch pipe 14 are used to connect the air filling box 9 and the blower 10;

[0051] The lower discharge port 12 and the side discharge port 27 are located at the bottom of the mixer housing 1 and the side discharge port 27 is located on the upper side of the mixer housing 1, respectively controlled by the spiral gate 13 and the pneumatic arc valve 15.

[0052] The top of the mixing machine box 1 is equipped with a dust removal port 6 and an observation port 8.

[0053] like Figure 4 As shown, the air box 9 includes an air distribution chamber 31, which is evenly distributed inside the air box 9. The lower part of the air distribution chamber 31 is an air inlet 32, and an air distribution chamber baffle 30 is provided above the air inlet 32. The air distribution chamber 31 evenly distributes the airflow through the air inlet 32. A reinforcing rib plate 29 is provided on the upper part of the air box 9.

[0054] The lifting device includes a chain 3, a sprocket 4, a scraper 5, a guide rail 23, and a lifting equipment transmission device 20. The guide rail 23 is vertically arranged, the sprocket 4 is arranged at the upper and lower ends of the guide rail 23, the chain 3 is installed between the sprockets 4 at both ends, and multiple scrapers 5 are installed on the chain 3 at intervals. The sprocket 4 is driven by the lifting equipment transmission device 20.

[0055] The lower sprocket 4 is mounted on the tail shaft 25, and the end of the tail shaft 25 is mounted on the tail seat 26; the upper sprocket 4 is mounted on the head shaft 7, and both ends of the head shaft 7 are mounted on the tension bearing seats 21 and driven by the lifting equipment transmission device 20.

[0056] like Figure 5 As shown, the scraper 5 has evenly distributed holes 33 and reinforced ribs 34 on its surface, which are used to disperse the powder and reduce lifting resistance.

[0057] The stirring device includes a stirring shaft 18, stirring blades 19, stirring transmission device 22, and sealing box 17;

[0058] The stirring blade 19 is mounted on the stirring shaft 18, and the surface of the stirring blade 19 has evenly distributed holes to enhance the mixing effect.

[0059] One end of the stirring shaft 18 passes through the outer wall of the mixer housing 1 and is connected to the stirring transmission device 22. The other end passes through the outer wall of the mixer housing 1 and is fixed on the stirring bearing seat 16. A sealing box 17 is provided at the connection position between the stirring shaft 18 and the outer wall of the mixer housing 1 for sealing.

[0060] like Figure 6 As shown, the inner layer of rolled felt 37 is symmetrically arranged on both sides of the sealing box 17 and sleeved on the stirring shaft 18. The inner layer of rolled felt 37 is provided with retaining rings 38 on both sides. The retaining rings 38 are pressed by the top screw 39 on one side of the sealing box 17 inside the mixer box 1. The outer layer of packing 36 and the pressure flange 35 are provided on the other side of the sealing box 17 and sleeved on the stirring shaft 18.

[0061] Small air boxes or air rods 40 are installed at the four corners of the bottom of the mixing machine housing 1 at an angle to eliminate dead corners during unloading.

[0062] Supports two mixing modes:

[0063] Quantitative stirring mode: Close the pneumatic arc valve 15, feed after static metering, and empty the box after mixing.

[0064] First, calculate the total amount of several powders when the filling volume reaches the position of the mixing shaft. When the mixer is running, close the lower pneumatic arc switch valve, and start the blower, mixer lifting equipment and mixing equipment in sequence. The several powders with accurate measurements enter the mixer box from the upper or side feed port. Under the full aeration of the air box at the bottom of the box and the scraper of the lifting equipment, the powder in the upper part can enter the lower part of the box, and the powder in the lower part can also be carried to the upper part of the box. The powders in the upper and lower parts are mixed repeatedly. After being stirred by the mixing blades for a certain period of time, open the lower pneumatic arc switch valve to empty all the powder in the box, and then enter the next mixing cycle.

[0065] Continuous mixing mode: Dynamic metering feeding, continuous feeding and discharging.

[0066] During operation, the metering equipment provides continuous dynamic metering, and the mixer adopts either top-in / side-out or side-in / side-out. The Roots blower, mixer lifting equipment, and agitator are started sequentially. Several powders, continuously and dynamically metered, enter the mixer housing from the top or side inlet. Under the influence of the air chamber at the bottom and the scraper of the lifting equipment, the powder from the top enters the lower part of the housing, while the powder from the bottom is carried to the top. The powders circulate and mix repeatedly, and after being agitated by the mixing blades, are finally discharged from the side outlet of the housing.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-functional pneumatic and mechanical compound mixer for powdery materials, characterized in that, include: Mixer housing (1), with a feed inlet (2) provided on the upper part or side of the mixer housing (1); The lifting device is installed inside the mixing machine housing (1) and is used for vertical circulation conveying of powder materials; A stirring device is installed in the upper part of the mixing machine box (1) for stirring the materials; An air-filled box (9) is located at the bottom of the mixing machine housing (1). A breathable cloth (28) is installed on the upper side of the air-filled box (9), and air is supplied by a blower (10). The main pipe (11) and the branch pipe (14) are used to connect the air filling box (9) and the blower (10). The lower discharge port (12) and the side discharge port (27) are located at the bottom of the mixer box (1) and the side discharge port (27) is located on the upper side of the mixer box (1), respectively controlled by the spiral gate (13) and the pneumatic arc valve (15).

2. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 1, characterized in that: The air-filled box (9) includes: The air distribution chamber (31) is evenly distributed in the air filling box (9). The lower part of the air distribution chamber (31) is the air inlet (32). The air inlet (32) is provided above the air inlet (32). The air distribution chamber (31) distributes the airflow evenly through the air inlet (32). The upper part of the air filling box (9) is provided with a reinforcing rib plate (29).

3. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 1, characterized in that: The lifting device includes a chain (3), a sprocket (4), a scraper (5), a guide rail (23), and a lifting equipment transmission device (20). The guide rail (23) is vertically arranged, the sprocket (4) is arranged at the upper and lower ends of the guide rail (23), the chain (3) is installed between the sprockets (4) at both ends, and multiple scrapers (5) are installed on the chain (3) at intervals. The sprocket (4) is driven by the lifting equipment transmission device (20).

4. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 3, characterized in that: The lower sprocket (4) is mounted on the tail shaft (25), and the end of the tail shaft (25) is mounted on the tailstock (26); the upper sprocket (4) is mounted on the head shaft (7). The head shaft (7) is mounted on the tension bearing housing (21) at both ends and is driven by the lifting equipment transmission device (20).

5. The pneumatic and mechanical multi-functional composite mixer for powdered materials according to claim 3 or 4, characterized in that: The scraper (5) has holes (33) evenly distributed on its surface and is provided with reinforcing ribs (34) to disperse the powder and reduce lifting resistance.

6. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 1, characterized in that: The stirring device includes a stirring shaft (18), stirring blades (19), stirring transmission device (22), and sealing box (17). The stirring blade (19) is mounted on the stirring shaft (18), and the surface of the stirring blade (19) is evenly distributed with holes to enhance the mixing effect; One end of the stirring shaft (18) passes through the outer wall of the mixer housing (1) and connects to the stirring transmission device (22), while the other end passes through the outer wall of the mixer housing (1) and is fixed on the stirring bearing seat (16). A sealing box (17) is provided at the connection position between the stirring shaft (18) and the outer wall of the mixer housing (1) for sealing.

7. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 6, characterized in that: The inner roll felt (37) is symmetrically arranged on both sides of the sealing box (17) and sleeved on the stirring shaft (18). The inner roll felt (37) is provided with retaining rings (38) on both sides. The retaining ring (38) is pressed by the top screw (39) on one side of the sealing box (1) inside the mixer box (1). The outer packing (36) and the pressure flange (35) are provided on the other side of the sealing box (17) and sleeved on the stirring shaft (18).

8. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 1, characterized in that: The bottom four corners of the mixing machine housing (1) are equipped with small air boxes or air rods (40) to eliminate dead corners during unloading.

9. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 1, characterized in that: Supports two mixing modes: Quantitative stirring mode: Close the pneumatic arc valve (15), feed after static metering, and empty the box after mixing; Continuous mixing mode: Dynamic metering feeding, continuous feeding and discharging.

10. The multi-functional composite mixer for powdered materials using both pneumatic and mechanical methods according to claim 1, characterized in that: The top of the mixing machine housing (1) is equipped with a dust removal port (6) and an observation port (8).

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