Powder mixing and gas conveying complete equipment

Abstract

The present application relates to powder mixing gas conveying complete equipment, related to powder mixing conveying technical field, including mixing bin, air inlet arc plate, discharge port, support frame, air blowing mechanism, material adjusting assembly, tee unloader, circulating tank, circulating pipe, screw conveyor, rotary lifting assembly, stirring assembly, stirring assembly, extrusion assembly, air blowing cover, the present application can solve the existing technology mechanical stirring is easy to produce shear segregation, and the traditional mixing bin in its cone or four corners is easy to form material retention dead zone, here the material does not participate in circulation for a long time, it is easy to cause the composition fluctuation between different batches, only the mixing effect of the area near the stirring shaft is good, the mixing effect of the remaining position is general, and the density of different materials is different, during stirring, gravity stratification is very easy to appear, once encountering material damp block or density difference greater mixing condition, material is prone to accumulate and compact at the bottom of the bin body and other problems.

Description

Technical Field

[0001] This invention relates to the technical field of powder mixing and conveying, and particularly to a complete set of equipment for gas conveying powder mixing. Background Technology

[0002] In the fields of building materials and chemical production, powder mixing and conveying processes are closely linked. Taking cement production as an example, powder materials of different components need to be fully and uniformly mixed in the mixing silo. The mixed materials need to be quickly and stably conveyed to the next process or designated area by the conveying equipment. At the same time, the efficient mixing process can effectively deal with the problem of gravity stratification caused by density differences between different materials, ensuring the stability of material composition. The gas conveying system can push the mixed powder materials over long distances or across regions according to production needs, improving the continuity and efficiency of overall material supply. Regarding the problem of mixing uniformity in powder mixing equipment, dead zones of material stagnation are easily formed inside the mixing silo, especially in the bottom cone and four corner areas. The material in these areas does not participate in circulation for a long time, and the mixing effect is good near the mixing shaft but the mixing effect in the edge area is average, which can easily lead to fluctuations in material composition.

[0003] Existing powder mixing equipment, such as Chinese Patent Publication No. CN218890508U, provides a powder mixing system comprising a powder feeding device, a pneumatic conveying device, a powder storage device, a high-temperature stirring device, and a powder cooling and stirring device connected in sequence. The powder feeding device includes a hopper, a filter cartridge, and a centrifugal fan. The hopper has a first material chamber and a blowing / suction chamber, with a partition separating the first material chamber and the blowing / suction chamber. The blowing / suction chamber is located above the first material chamber. The hopper has a first inlet and a first outlet connecting to the first material chamber. The partition has mounting holes, and the filter cartridge passes through the mounting holes and is fixedly connected to the partition. The centrifugal fan is installed in the hopper and has an inlet and an outlet that are interconnected. The inlet is sealed and inserted into the blowing / suction chamber, while the outlet is located outside the hopper. By installing a centrifugal fan and a filter cartridge on the hopper, the amount of dust diffused outside the hopper is greatly reduced, thereby reducing the amount of dust dispersed in the working environment.

[0004] The aforementioned technologies primarily rely on mechanical stirring rods for material mixing and a screw shaft for conveying. However, when dealing with powder mixing operations, these devices exhibit poor performance in terms of mixing uniformity. Mechanical stirring is prone to shear segregation, and traditional mixing silos often form dead zones at their cones or corners where materials do not participate in circulation for extended periods, leading to significant fluctuations in material composition between different batches. Furthermore, during mixing, only the area near the stirring shaft exhibits good mixing results, while other areas show only moderate mixing. Additionally, the different densities of various materials make gravity stratification highly likely during mixing, resulting in uneven mixing. If materials become damp and clump together or exhibit significant density differences, they easily accumulate and compact at the bottom of the silo, severely hindering the normal operation of the screw shaft and potentially causing motor overload and seizure. This significantly disrupts subsequent material conveying and mixing, making normal production difficult to carry out. Therefore, there is room for improvement beyond the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a complete set of equipment for gas conveying powder mixing, which aims to improve mixing efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A complete set of gas conveying equipment for powder mixing includes: a mixing silo with several sets of air inlet arc plates at its bottom and a discharge port at the lower center; the mixing silo is supported by a support frame; an air blowing mechanism located at the lower end of the mixing silo to agitate the material on the air inlet arc plates; a material regulating component rotatably located inside the mixing silo to physically agitate the material within; and a three-way unloader connected at its upper end to the discharge port, with its lower left end connected to a circulation tank and circulation pipe. The right side connects to the screw conveyor, and the upper end of the circulation pipe is connected to the interior of the mixing silo. The upper end of the rotary lifting assembly is connected to the upper end of the mixing silo, and the lower end of the rotary lifting assembly is equipped with a horizontally rotatable stirring assembly. The lower end of the stirring assembly is threadedly connected to the mixing assembly. The mixing assembly slides up and down in the mixing silo, and the lower end of the mixing assembly passes through the extrusion assembly and connects to the air-blowing cover. The extrusion assembly is installed inside the mixing silo, and the position of the air-blowing cover corresponds to the position of the discharge port. The rotary lifting assembly and the stirring assembly are used to perform multi-directional mixing of the accumulated mixture in the middle area of ​​the mixing silo.

[0008] As a preferred embodiment of the present invention, the bottom surface of the mixing hopper is gradually inclined downward from the outside to the inside, and air holes are evenly opened on the air inlet arc plate, and the surface of the air inlet arc plate is covered with a breathable inclined groove canvas.

[0009] As a preferred embodiment of the present invention, the air blowing mechanism includes a pipe, which is connected to the lower end face of the mixing hopper via a connector. An air blowing head is connected to the pipe. The bottom face of the mixing hopper and the lower end of the air inlet arc plate form an air blowing chamber, and the air blowing head extends into the air blowing chamber.

[0010] As a preferred embodiment of the present invention, the material adjustment assembly includes a rotating shaft, which is connected to the mixing bin via a bearing. The rear end of the rotating shaft is connected to a working motor, which is connected to the outer wall of the mixing bin via a motor mount. Stirring rods are uniformly arranged along the circumference of the rotating shaft.

[0011] As a preferred embodiment of the present invention, an air inlet is provided on the left side of the circulation tank, and a circulation pipe is provided between the rear end of the circulation tank and the mixing silo. A feed inlet is provided on the front side of the lower end of the circulation pipe with a three-way structure, and the feed inlet has a flared structure. A valve-structured interface is provided on the rear side of the lower end of the circulation pipe.

[0012] As a preferred embodiment of the present invention, the rotary lifting assembly includes a telescopic cylinder, which is connected to the upper part of the mixing hopper through a sealing cover. The lower end of the telescopic cylinder is connected to the inner cover, and the upper end of the inner cover is connected to the sealing cover by a telescopic cover. An actuator motor is installed inside the inner cover, and the output shaft of the actuator motor is connected to a rotating plate. The rotating plate and the lower end of the inner cover are rotatably connected.

[0013] As a preferred embodiment of the present invention, the agitation assembly includes an agitation cone, the upper end of which is connected to a rotating plate. The upper half of the outer wall of the agitation cone is uniformly provided with a comb-shaped agitation plate along its circumference. The lower half of the outer wall of the agitation cone is uniformly provided with an agitator that can swing up and down along its circumference. The lower end of the agitation cone is connected to a threaded post through a connecting post. An extrusion member is slidably sleeved on the outside of the connecting post.

[0014] As a preferred embodiment of the present invention, the agitator includes an angle rod, the inner side of which is connected to an internal groove on the side wall of the agitator cone via a pin, a sealing ring is fitted at one end of the angle rod near the internal groove, a connecting cover is connected between the sealing ring and the internal groove, a longitudinally arranged stirring plate is installed in the middle of the angle rod, and a horizontally arranged stirring component is installed at the outer end of the angle rod.

[0015] As a preferred embodiment of the present invention, the extrusion member includes a sliding sleeve, which is slidably disposed on the connecting column. Extrusion columns are uniformly disposed on the sliding sleeve along its circumference, and the upper end face of the extrusion column abuts against the area below the angle rod.

[0016] As a preferred embodiment of the present invention, the stirring assembly includes a movable block, which is slidably disposed inside the mixing bin. The movable block has a threaded groove inside, and the threaded groove and the threaded post are connected by a threaded engagement. Agitating components are symmetrically disposed at the left and right ends of the movable block, and stirring units are symmetrically disposed at the lower end of the movable block. An extrusion rod is installed in the middle of the lower end of the movable block.

[0017] As a preferred embodiment of the present invention, the agitating component includes a connecting plate, the inner side of which is connected to the movable block, and an opening groove is provided at the outer end of the connecting plate, the interior of which is connected to a rotating component via a pin.

[0018] As a preferred embodiment of the present invention, the stirring unit includes a stirring rake, the upper end of which is connected to the lower end of the movable block via a pin, and an elastic telescopic structure is provided in the middle of the stirring rake. A limiting member for limiting the outside of the stirring rake is fixedly installed on the outside of the movable block, and a return spring is connected between the stirring rake and the limiting member, and a dust cover is provided on the outside of the return spring.

[0019] As a preferred embodiment of the present invention, the extrusion assembly includes a connecting frame, which is fixedly installed in the mixing hopper. A top support is symmetrically and slidably arranged inside the connecting frame. The upper inner side of the top support has a chamfered structure, and the outer arc-shaped surface of the top support abuts against the inner side of the stirring rake. A tapered head is provided at the lower end of the extrusion rod.

[0020] As a preferred embodiment of the present invention, the air-blowing cover includes a connecting rod, which is connected between the extrusion rod and the T-shaped block. The T-shaped block is slidably disposed in the sliding frame, and the sliding frame is installed on the inner cover. The inner cover has uniformly opened spray holes inside, and the upper part of the spray holes has a structure that gradually slopes outward.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] 1. This application overcomes the homogenization limitations of traditional mixing by coordinating the air blowing mechanism and the material conditioning component. It achieves differentiated flow field adjustment through zoned ratio control, solves the problems of material stratification and short-circuit flow, and improves the mixing uniformity. The air blowing mechanism uniformly sprays air through the air inlet arc plate to fluidize and tumble the material. The material conditioning component moves the material at low speed to prevent accumulation. The rotating lifting component and the extrusion component work together to drive the horizontal rotation of the stirring component and the up-and-down stirring of the mixing component to disperse the material in the middle in multiple directions, so as to achieve all-round uniform mixing of powder materials. The cooperation of each component effectively solves the problems of material stratification and short-circuit flow, and greatly improves the mixing uniformity.

[0023] 2. This application constructs a material return channel by setting up a circulation tank and circulation pipe. By using the bottom air intake of the circulation tank in conjunction with the funnel structure, the accumulated material falling into the bottom of the discharge port is continuously pneumatically sent back to the upper part of the mixing silo for secondary mixing. This design solves the problem of the dead zone of mixing at the bottom of the traditional mixing silo and further ensures the stability of the composition of each batch of materials.

[0024] 3. This application adopts gas conveying and traditional mechanized rotation, and has a highly integrated design, which not only reduces the requirements for installation space and equipment wear and maintenance costs, but also significantly reduces the equipment footprint and construction period, and improves mobility and applicability. Attached Figure Description

[0025] Figure 1 This is a first structural schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the second structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the mixing silo, air inlet arc plate, discharge port, support frame, air blowing mechanism, material adjustment assembly, three-way unloader, circulation tank, circulation pipe and screw conveyor of the present invention;

[0028] Figure 4 This is a schematic diagram of the back structure between the mixing bin, air inlet arc plate, discharge port, support frame, and air blowing mechanism of the present invention;

[0029] Figure 5 This is an overall sectional view of the present invention;

[0030] Figure 6 This is the present invention. Figure 5 A partial schematic diagram;

[0031] Figure 7 This is a schematic diagram of the structure between the rotary lifting assembly, stirring assembly, mixing assembly, extrusion assembly, and air-blown cover of the present invention;

[0032] Figure 8 This is the present invention. Figure 5 A magnified view of the area at point X;

[0033] Figure 9 This is the present invention. Figure 6 A magnified view of the area at point Y;

[0034] Figure 10 This is the present invention. Figure 6 A magnified view of the Z-axis.

[0035] Explanation of reference numerals in the attached drawings: 1. Mixing silo; 11. Air inlet arc plate; 12. Discharge port; 13. Support frame; 2. Air blowing mechanism; 21. Pipeline; 22. Air blowing head; 3. Material adjustment assembly; 31. Rotating shaft; 32. Working motor; 33. Stirring rod; 4. Three-way unloader; 41. Circulation tank; 42. Circulation pipe; 43. Screw conveyor; 44. Air inlet; 45. Feed inlet; 46. Connecting port; 5. Rotary lifting assembly; 51. Telescopic cylinder; 52. Internal cover; 53. Actuating motor; 54. Rotating plate; 6. Agitating assembly; 61. Agitating cone; 62. Agitating plate; 63. Agitating component 631. Angle rod; 632. Connecting cover; 633. Stirring plate; 634. Stirring component; 64. Connecting column; 65. Threaded column; 66. Extrusion component; 661. Sliding sleeve; 662. Extrusion column; 7. Stirring assembly; 71. Movable block; 72. Agitating component; 721. Connecting plate; 722. Rotating component; 73. Stirring unit; 731. Stirring rake; 732. Limiting component; 733. Return spring; 74. Extrusion rod; 8. Extrusion assembly; 81. Connecting frame; 82. Top support component; 9. Air blow cover; 91. Connecting rod; 92. T-block; 93. Sliding frame; 94. Embedded cover. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1 to 10 This application will be described in further detail.

[0037] This application discloses a complete set of gas conveying equipment for powder mixing. This application solves the problems of material stratification and short-circuit flow by mechanical stirring and regional pneumatic methods, thereby improving the mixing uniformity. Then, the bottom material is recovered and remixed through the circulation tank 41, which solves the problem that the bottom material of traditional mixing silos cannot be fully stirred.

[0038] Reference Figures 1 to 5As shown, the powder mixing gas conveying complete set of equipment disclosed in this embodiment includes a mixing silo 1, an air inlet arc plate 11, a discharge port 12, a support frame 13, an air blowing mechanism 2, a material adjusting component 3, a three-way unloader 4, a circulation tank 41, a circulation pipe 42, a screw conveyor 43, a rotary lifting component 5, a stirring component 6, a mixing component 7, an extrusion component 8, and an air blowing cover 9. Several sets of air inlet arc plates 11 are laid at the bottom of the mixing silo 1. A discharge port 12 is opened at the lower middle of the mixing silo 1. The mixing silo 1 is supported by the support frame 13. The air blowing mechanism 2 is located at the lower end of the mixing silo 1. The air blowing mechanism 2 agitates the material on the air inlet arc plate 11. The material adjusting component 3 is rotatably installed inside the mixing silo 1. The material adjusting component 3 physically agitates the material in the mixing silo 1. The upper end of the three-way unloader 4 is connected to the discharge port 12, and the lower left side of the three-way unloader 4 is connected to the circulation tank 41. The ring pipe 42 is connected, and the lower right side of the three-way unloader 4 is connected to the screw conveyor 43. The screw conveyor 43 is set as an alternative output port. If the material in the mixing silo 1 needs to be transported to the outside, the material in the mixing silo 1 can be transported to the designated location outside through the screw conveyor 43. The upper end of the circulation pipe 42 is connected to the inside of the mixing silo 1. The upper end of the rotary lifting component 5 is connected to the upper end of the mixing silo 1. The lower end of the rotary lifting component 5 is equipped with a horizontally rotatable stirring component 6. The lower end of the stirring component 6 is threadedly connected to the mixing component 7. The mixing component 7 is slidably arranged in the mixing silo 1. The lower end of the mixing component 7 passes through the extrusion component 8 and is connected to the air blow cover 9. The extrusion component 8 is installed inside the mixing silo 1, and the position of the air blow cover 9 corresponds to the position of the discharge port 12. The rotary lifting component 5 and the mixing component 7 are used to perform multi-directional mixing of the accumulated mixture in the middle area of ​​the mixing silo 1.

[0039] In the actual conveying process, this application conveys the powder mixture (material) to the mixing silo 1. The material is stirred by the stirring component 6, and the material at the bottom of the mixing silo 1 is also turned upward to prevent the material from accumulating at the inlet of the air blowing mechanism 2. The air blowing mechanism 2 performs regional air blowing and turning of the material in the mixing silo 1. At the same time, the rotating lifting component 5 and the extrusion component 8 work together to drive the stirring component 6 to rotate horizontally and the stirring component 7 to stir up and down, thereby dispersing the accumulation area in the middle of the mixing silo 1 (the area above the discharge port 12). During the entire mixing process, the material accumulated in the area above the discharge port 12 will intermittently enter the three-way unloader 4, and then enter the circulation tank 41 and circulation pipe 42 before being returned to the mixing silo 1. After the material mixing is completed, the material is conveyed to the designated area through the docking port 46 in the circulation pipe 42.

[0040] Reference Figure 5 , Figure 8As shown, the bottom surface of the mixing chamber 1 is gradually inclined downward from the outside to the inside, so that the air inlet arc plate 11 laid at the bottom of the mixing chamber 1 is also gradually inclined downward from the outside to the inside, so that the material moves towards the middle area of ​​the mixing chamber 1 during mixing. Air holes are evenly opened on the air inlet arc plate 11, and the surface of the air inlet arc plate 11 is covered with a breathable inclined groove canvas. The inclined groove canvas prevents the material from entering the air holes, but the gas can pass through the inclined groove canvas and be blown upward.

[0041] Reference Figure 4 , Figure 8 As shown, the air blowing mechanism 2 includes a pipe 21, which is connected to the lower end of the mixing bin 1 via a connector. An air blowing head 22 is connected to the pipe 21. The bottom surface of the mixing bin 1 and the lower end of the air inlet arc plate 11 form an air blowing chamber. The air blowing head 22 extends into the air blowing chamber and connects the pipe 21 to an external air pump. The external air pump delivers gas to the pipe 21 and finally blows it upward from the air blowing head 22, thereby blowing the material at the bottom of the mixing bin 1 upward and achieving a thorough turning effect.

[0042] Reference Figure 2 , Figure 3 , Figure 6 As shown, the material adjustment component 3 includes a rotating shaft 31, which is connected to the mixing chamber 1 via a bearing. The rear end of the rotating shaft 31 is connected to a working motor 32, which is connected to the outer wall of the mixing chamber 1 via a motor base. Stirring rods 33 are evenly arranged on the rotating shaft 31 along its circumference.

[0043] In actual operation, the working motor 32 drives the rotating shaft 31 and the stirring rod 33 to mechanically agitate the material in the mixing bin 1. It should be noted that the stirring rod 33 on the left side rotates counterclockwise and the stirring rod 33 on the right side rotates clockwise, with a speed of 1 r / min.

[0044] Reference Figure 2 As shown, an air inlet 44 is provided on the left side of the circulation tank 41. A circulation pipe 42 is provided between the rear end of the circulation tank 41 and the mixing bin 1. A feed inlet 45 is provided on the front side of the lower end of the three-way circulation pipe 42, and the feed inlet 45 is a flared structure. A valve-structured interface 46 is provided on the rear side of the lower end of the circulation pipe 42. A pneumatic butterfly valve three is provided in the middle of the circulation pipe 42. A pneumatic butterfly valve four is provided in the interface 46. A pneumatic butterfly valve one is provided inside the lower left side of the three-way unloader 4. A pneumatic butterfly valve two is provided inside the lower right side of the three-way unloader 4.

[0045] In actual gas transportation processes, the actual transportation trajectory consists of multiple states, as detailed below.

[0046] When the gas blows upward from the outlet 12 to agitate the accumulated material (the air blowing cover 9 is embedded in the outlet 12, and the material cannot fall from the outlet 12 at this time), the pneumatic butterfly valve 1 opens the left side of the three-way unloader 4 to make it in a passable state, the pneumatic butterfly valve 2 closes the right side of the three-way unloader 4 to make it in a closed state, the pneumatic butterfly valve 3 closes the circulation pipe 42 to make it in a closed state, and the pneumatic butterfly valve 4 closes the connection port 46 to make it in a closed state. At this time, the gas can only pass through the three-way unloader 4 and then be blown out from the outlet 12.

[0047] When the material in the gas-assisted circulation tank 41 is circulated to the mixing bin 1 through the circulation pipe 42, the air-blown cover 9 is disengaged from the discharge port 12, and the material can fall from the discharge port 12 into the circulation tank 41. Subsequently, the pneumatic butterfly valve one closes the left side of the three-way unloader 4 to make it closed, the pneumatic butterfly valve two closes the right side of the three-way unloader 4 to make it closed, so that the upper end of the circulation tank 41 is closed, the pneumatic butterfly valve three opens the circulation pipe 42 to make it open, and the pneumatic butterfly valve four closes the docking port 46 to make it closed. At this time, the gas can blow the material in the circulation tank 41 into the circulation pipe 42 for circulation. Repeating the above steps can make the material circulated intermittently.

[0048] When the mixed materials need to be transported to the designated area, pneumatic butterfly valve 1 opens the left side of the three-way unloader 4 to make it in the pass state, pneumatic butterfly valve 2 closes the right side of the three-way unloader 4 to make it in the closed state, pneumatic butterfly valve 3 closes the middle of the circulation pipe 42 to make it in the closed state, and pneumatic butterfly valve 4 opens the docking port 46 to make it in the pass state. At this time, the three-way unloader 4 is filled with the falling material, and the gas can only transport the material in the circulation tank 41 to the inlet 45 so that it enters the first half of the circulation pipe 42 and is then output from the docking port 46. The interface of the docking port 46 is connected to the designated area by an existing conveying pipe, and the material is transported to the designated area after passing through the conveying pipe.

[0049] When materials need to be transported to the outside area, pneumatic butterfly valve one closes the left side of the three-way unloader 4 to make it closed, and pneumatic butterfly valve two opens the right side of the three-way unloader 4 to make it open (pneumatic butterfly valve three and pneumatic butterfly valve four are both closed). At this time, the materials in the mixing bin 1 are transported to the outside area by the screw conveyor 43.

[0050] Reference Figure 6 , Figure 7As shown, the rotary lifting assembly 5 includes a telescopic cylinder 51, which is connected to the upper part of the mixing chamber 1 through a sealing cover. The lower end of the telescopic cylinder 51 is connected to the inner cover 52, and the upper end of the inner cover 52 is connected to the sealing cover by a telescopic cover. Both the sealing cover and the telescopic cover serve to prevent dust. An actuator motor 53 is installed inside the inner cover 52. The output shaft of the actuator motor 53 is connected to the rotating plate 54, and the rotating plate 54 is rotatably connected to the lower end of the inner cover 52.

[0051] Reference Figure 6 , Figure 7 , Figure 9 As shown, the agitation assembly 6 includes an agitation cone 61, the upper end of which is connected to a rotating plate 54. The upper half of the outer wall of the agitation cone 61 is uniformly provided with a comb-shaped agitation plate 62 along its circumference. The lower half of the outer wall of the agitation cone 61 is uniformly provided with an agitator 63 that can swing up and down along its circumference. The lower end of the agitation cone 61 is connected to a threaded post 65 through a connecting post 64. An extrusion member 66 is slidably sleeved on the outside of the connecting post 64.

[0052] Reference Figure 9 As shown, the stirring component 63 includes an angle rod 631. The inner side of the angle rod 631 is connected to the built-in groove opened in the side wall of the stirring cone 61 through a pin. A sealing ring is sleeved on one end of the angle rod 631 near the built-in groove. A connecting cover 632 is connected between the sealing ring and the built-in groove. A longitudinally arranged stirring plate 633 is installed in the middle of the angle rod 631. A horizontally arranged stirring component 634 is installed at the outer end of the angle rod 631.

[0053] Reference Figure 9 As shown, the extrusion component 66 includes a sliding sleeve 661, which is slidably mounted on the connecting column 64. Extrusion columns 662 are evenly arranged along the circumference of the sliding sleeve 661. The upper end face of the extrusion column 662 abuts against the area below the angle rod 631. During the upward movement of the movable block 71, it will contact the sliding sleeve 661, and then the two will rise synchronously. The rising extrusion column 662 extrudes the angle rod 631 to adjust the upward angle, so that the stirring component 634 is raised to the upward angle. At this time, the stirring plate 633 in the longitudinal state stirs the material horizontally, while the stirring component 634 raised to the upward angle flips the material upward. The double stirring improves the mixing effect.

[0054] Reference Figure 10As shown, the stirring assembly 7 includes a movable block 71, which is slidably disposed inside the mixing chamber 1. The movable block 71 has a threaded groove inside, and the threaded groove and the threaded post 64 are connected by a threaded engagement. Agitating components 72 are symmetrically arranged at the left and right ends of the movable block 71, and stirring units 73 are symmetrically arranged at the lower end of the movable block 71. An extrusion rod 74 is installed in the middle of the lower end of the movable block 71.

[0055] Reference Figure 10 As shown, the stirring component 72 includes a connecting plate 721. The inner side of the connecting plate 721 is connected to the movable block 71. An opening groove is provided at the outer end of the connecting plate 721. The interior of the opening groove is connected to the rotating component 722 through a pin.

[0056] Reference Figure 10 As shown, the stirring unit 73 includes a stirring rake 731. The upper end of the stirring rake 731 is connected to the lower end of the movable block 71 via a pin. An elastic telescopic structure is provided in the middle of the stirring rake 731. A limiting member 732 for limiting the outer side of the stirring rake 731 is fixedly installed on the outer side of the movable block 71. A return spring 733 is connected between the stirring rake 731 and the limiting member 732. A dust cover is provided on the outside of the return spring 733.

[0057] Reference Figure 10 As shown, the extrusion assembly 8 includes a connecting frame 81, which is fixedly installed in the mixing bin 1. A top support 82 is symmetrically slidably arranged inside the connecting frame 81. The upper inner side of the top support 82 has a chamfered structure, and the outer arc-shaped surface of the top support 82 abuts against the inner side of the stirring rake 731. The lower end of the extrusion rod 74 has a conical head. The specific extrusion steps between the extrusion rod 74 and the extrusion assembly 8 are as follows: During the process of the movable block 71 driving the extrusion rod 74 to descend, the extrusion rod 74 extrudes the top support 82 to move in the opposite direction, thereby opening the stirring rake 731, causing the stirring rakes 731 on both sides to open outwards. When the movable block 71 drives the extrusion rod 74 to rise, the extrusion rod 74 no longer extrudes the top support 82. At this time, under the action of the return spring 733, the stirring rakes 731 on both sides are driven to adjust their angle inwards, and the top support 82 is extruded into the connecting frame 81.

[0058] Reference Figure 10 As shown, the air-blowing cover 9 includes a connecting rod 91, which is connected between the extrusion rod 74 and the T-shaped block 92. The T-shaped block 92 is slidably disposed in the sliding frame 93. The sliding frame 93 is installed on the inner cover 94. The inner cover 94 has uniformly opened spray holes inside, and the upper part of the spray holes has a structure that gradually tilts outward, so that the gas blown out of the spray holes is blown obliquely upward.

[0059] When the material is agitated and blown over by the material adjustment component 3, the material will move towards the central area of ​​the mixing bin 1 and accumulate. This application uses the rotation lifting component 5 and the extrusion component 8 to drive the stirring component 6 to rotate horizontally and the mixing component 7 to stir up and down, thereby dispersing the accumulation area in the central area of ​​the mixing bin 1. The specific steps are as follows:

[0060] As gas blows upward from the outlet 12, agitating the accumulated material, the telescopic cylinder 51 drives the stirring assembly 6, mixing assembly 7, extrusion assembly 8, and air-blowing cover 9 to their lowest positions. At this point, the inner cover 94 is embedded in the outlet 12, preventing material from passing downwards but allowing gas to blow upwards. Then, the actuator motor 53 drives the stirring cone 61 and stirring plate 62 to rotate horizontally, and the stirring component 63 to perform multi-directional agitation with small horizontal and vertical amplitudes (note that the actuator motor 53 rotates intermittently, i.e., counterclockwise for a period followed by clockwise rotation). This multi-directional agitation of the upper part of the accumulation area, combined with the engagement of the threaded column 65 and threaded groove, causes the movable block 71 to reciprocate up and down. Simultaneously, the stirring component 72 moves up and down synchronously. With the cooperation of the extrusion rod 74 and extrusion assembly 8, the stirring rake 731 in the mixing unit 73, while following the reciprocating motion of the movable block 71, undergoes small-range angle changes, thereby agitating the material in the outlet area. The material above the discharge port 12 is pried open at an angle to prevent material from accumulating in the middle of the mixing hopper, ensuring smooth air blowing and turning. Through multi-directional stirring, the accumulated material is evenly dispersed, allowing the powder materials of different components to be fully mixed. At the same time, it avoids local material accumulation and compaction that could obstruct the air blowing passage, ensuring mixing efficiency and uniformity. It should be noted that even with mechanical stirring, the material in the middle area may not be dispersed. Therefore, this application periodically opens the discharge port 12 to allow the material above the discharge port 12 to fall into the circulation tank 41, and then circulate it to the upper layer of the material in the mixing hopper 1 for further mixing. Specifically, the telescopic cylinder drives the stirring component 6, mixing component 7, extrusion component 8, and air blowing cover 9 to rise to the highest position. At this time, the inner cover 94 moves upward and separates from the discharge port 12 at a distance. The qualified material accumulated in the middle of the mixing hopper naturally falls into the three-way unloader and then enters the circulation tank to complete the circulation push.

[0061] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A complete set of gas conveying equipment for powder mixing, characterized in that, include: The mixing silo has several sets of air inlet arc plates at its bottom, and a discharge port is opened at the lower center of the mixing silo. The mixing silo is supported by a support frame. The air blowing mechanism is located at the lower end of the mixing bin. It blows air to agitate the material on the air inlet arc plate. The material regulating component is rotated inside the mixing bin, and the material in the mixing bin is physically agitated by the material regulating component; The three-way unloader is connected to the discharge port at its upper end, and to the circulation tank and circulation pipe at its lower left end through the circulation tank. It is also connected to the screw conveyor at its lower right end, and to the interior of the mixing silo at its upper end. The rotary lifting assembly is connected to the upper end of the mixing hopper. The lower end of the rotary lifting assembly is equipped with a horizontally rotatable agitator. The lower end of the agitator is threadedly connected to the mixing assembly. The mixing assembly slides up and down in the mixing hopper. The lower end of the mixing assembly passes through the extrusion assembly and is connected to the air-blowing cover. The extrusion assembly is installed inside the mixing hopper, and the air-blowing cover is positioned corresponding to the discharge port. The rotary lifting assembly and the mixing assembly are used to perform multi-directional mixing of the accumulated mixture in the middle area of ​​the mixing hopper.

2. The complete set of equipment for powder mixing and gas conveying according to claim 1, characterized in that: The bottom surface of the mixing hopper is gradually inclined downward from the outside to the inside. Air holes are evenly opened on the air intake arc plate, and the surface of the air intake arc plate is covered with breathable inclined groove canvas. The air blowing mechanism includes a pipe, which is connected to the lower end face of the mixing hopper via a connector. An air blowing head is connected to the pipe. The bottom face of the mixing hopper and the lower end of the air inlet arc plate form an air blowing chamber, and the air blowing head extends into the air blowing chamber. The material adjustment assembly includes a rotating shaft, which is connected to the mixing bin via a bearing. The rear end of the rotating shaft is connected to a working motor, which is connected to the outer wall of the mixing bin via a motor mount. Stirring rods are evenly arranged along the circumference of the rotating shaft.

3. The complete set of equipment for powder mixing and gas conveying according to claim 1, characterized in that: An air inlet is provided on the left side of the circulation tank. A circulation pipe is provided between the rear end of the circulation tank and the mixing silo. A feed inlet is provided on the front side of the lower end of the circulation pipe, which has a flared shape. A valve-shaped connection port is provided on the rear side of the lower end of the circulation pipe.

4. The complete set of powder mixing and gas conveying equipment according to claim 1, characterized in that: The rotary lifting assembly includes a telescopic cylinder, which is connected to the upper part of the mixing hopper through a sealing cover. The lower end of the telescopic cylinder is connected to the inner cover, and the upper end of the inner cover is connected to the sealing cover by a telescopic cover. An actuator motor is installed inside the inner cover, and the output shaft of the actuator motor is connected to a rotating plate. The rotating plate and the lower end of the inner cover are rotatably connected.

5. The complete set of powder mixing and gas conveying equipment according to claim 4, characterized in that: The agitation assembly includes an agitation cone, the upper end of which is connected to a rotating plate. The upper half of the outer wall of the agitation cone is uniformly provided with a comb-shaped agitation plate along its circumference. The lower half of the outer wall of the agitation cone is uniformly provided with an agitator that can swing up and down along its circumference. The lower end of the agitation cone is connected to a threaded post through a connecting post. An extrusion member is slidably sleeved on the outside of the connecting post.

6. The complete set of equipment for powder mixing and gas conveying according to claim 5, characterized in that: The agitator includes an angle rod, the inner side of which is connected to an internal groove on the side wall of the agitator cone via a pin. A sealing ring is fitted on the end of the angle rod near the internal groove, and a connecting cover is connected between the sealing ring and the internal groove. A longitudinally arranged stirring plate is installed in the middle of the angle rod, and a horizontally arranged stirring component is installed at the outer end of the angle rod. The extrusion component includes a sliding sleeve, which is slidably mounted on the connecting column. Extrusion columns are evenly arranged on the sliding sleeve along its circumference, and the upper end face of the extrusion column abuts against the area below the angle rod.

7. The complete set of equipment for powder mixing and gas conveying according to claim 5, characterized in that: The mixing assembly includes a movable block that slides up and down inside the mixing hopper. The movable block has a threaded groove inside, and the threaded groove and the threaded post are connected by a threaded engagement. Agitators are symmetrically arranged at the left and right ends of the movable block, and a mixing unit is symmetrically arranged at the lower end of the movable block. An extrusion rod is installed in the middle of the lower end of the movable block.

8. The complete set of equipment for powder mixing and gas conveying according to claim 7, characterized in that: The stirring component includes a connecting plate, the inner side of which is connected to the movable block, and an opening groove is provided at the outer end of the connecting plate. The interior of the opening groove is connected to a rotating component via a pin. The stirring unit includes a stirring rake, the upper end of which is connected to the lower end of the movable block via a pin. The middle part of the stirring rake is provided with an elastic telescopic structure for limiting the outer side of the stirring rake. The limiting component is fixedly installed on the outer side of the movable block. A return spring is connected between the stirring rake and the limiting component, and a dust cover is provided on the outside of the return spring.

9. The complete set of equipment for powder mixing and gas conveying according to claim 8, characterized in that: The extrusion assembly includes a connecting frame, which is fixedly installed in the mixing hopper. A top support is symmetrically slidably arranged inside the connecting frame. The upper inner side of the top support has a chamfered structure, and the outer arc-shaped surface of the top support abuts against the inner side of the stirring rake. A tapered head is provided at the lower end of the extrusion rod.

10. The complete set of equipment for powder mixing and gas conveying according to claim 7, characterized in that: The air-blowing cover includes a connecting rod that connects the extrusion rod and the T-block. The T-block is slidably mounted in a sliding frame. The sliding frame is mounted on the inner cover. The inner cover has uniformly spaced spray holes inside, and the upper part of the spray holes has a structure that gradually slopes outward.

Images