A rapid pulping and mixing device and its material conveying device

Abstract

This invention provides a rapid pulping and foaming equipment and its material conveying device. The mixing tank of the rapid pulping and foaming equipment has a top opening and a bottom outlet. The stirring mechanism of the mixing tank includes a rotating outer shaft and a rotating inner shaft, as well as a first driving component and a second driving component. The rotating inner shaft is relatively independently sleeved inside the rotating outer shaft, and the rotating inner shaft is correspondingly provided with a stirring disc, while the rotating outer shaft is correspondingly provided with multiple sets of stirring blades. The stirring disc is located below the stirring blades, and the pulping raw materials are rapidly pulped to form a slurry through the stirring disc. The foam conveying mechanism's foam conveying pipe is used to input foam into the mixing tank to fully contact the slurry. The foam and slurry are fully mixed in the stirring blades, thereby cooperating with the stirring disc to uniformly stir the slurry and foam in the mixing tank. This can eliminate blind spots as much as possible, accelerate material circulation and homogenization speed, reduce the time to reach the target uniformity, and improve production capacity and energy efficiency ratio.

Description

Technical Field

[0001] This invention relates to the field of slurry foam mixing technology, and more specifically, to a rapid slurry mixing and foaming equipment and its material conveying device. Background Technology

[0002] Currently, the composite process of mixing and foaming is widely used in industries such as building materials, chemicals, and coatings. However, most existing pulping equipment consists of single-shaft agitators or simple top-mounted gas-liquid injection structures. Single-shaft agitation often creates blind zones in the radial and axial directions, especially at the bottom of the container or near the sidewalls, resulting in insufficient contact between the pulping material and the foam, leading to uneven distribution of product density, pore structure, or properties. Furthermore, if the foam is injected directly from the top, strong shear or localized high-speed flow can damage the foam structure, reducing the gas phase content and foaming effect. Traditional injection methods also make it difficult for the foam to fully contact and diffuse with the slurry, resulting in localized enrichment or thinning.

[0003] Furthermore, while high rotation speed and high shear are required to improve uniformity, high shear is detrimental to foam protection and increases energy consumption and equipment wear. Moreover, a single drive or an inability to independently adjust shear and propulsion flow makes it difficult to optimize for different materials or formulations. This can even lead to foam buildup in bottom corners, on sidewalls, or at the outlet, significantly impacting the stability of cleaning and continuous production.

[0004] In response, multi-stage mixing or zoned stirring were adopted to reduce the instantaneous damage to the foam. However, this approach is not only structurally complex and costly, but also prone to foam destruction when slowly mixing after the preparation of stable foam. Furthermore, it is difficult to implement stably in large-scale continuous processes and cannot completely solve the problem of propulsion and shear separation control. In particular, uneven stirring is still prone to occur in high-viscosity systems or tanks with strong convection blind zones. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a rapid pulping and foaming equipment and its material conveying device to solve the above problems.

[0006] The present invention adopts the following solution: This application provides a rapid pulping and foaming device, including a mixing tank; the mixing tank has a top opening and a bottom outlet; the mixing tank is equipped with a stirring mechanism and a foaming mechanism; the top opening is used to feed pulping raw materials into the mixing tank, and the bottom outlet is used to output the mixed material after stirring when opened; the stirring mechanism includes a coaxially arranged outer rotating shaft and an inner rotating shaft, a first driving member for freely rotating the outer rotating shaft, and a second driving member for freely rotating the inner rotating shaft; the inner rotating shaft is relatively independently sleeved inside the outer rotating shaft, and the inner rotating shaft is correspondingly provided with... The mixing tank has a stirring disc extending into it. The rotating outer shaft is equipped with a horizontally positioned connecting shaft and multiple sets of stirring blades wound around the connecting shaft. The stirring disc is located below the stirring blades and performs a rapid pulping operation on the pulping raw materials to form a slurry. The foam conveying mechanism includes a foam conveying pipe that connects to the inside of the mixing tank along its side. The foam conveying pipe is used to input foam into the mixing tank to fully contact the slurry. The stirring blades perform a thorough mixing operation on the foam and slurry, thereby cooperating with the stirring disc to uniformly stir the slurry and foam in the mixing tank.

[0007] As a further improvement, the stirring blades are arranged in a regular spiral around the rotating outer shaft, which is suitable for tumbling and stirring the slurry and foam up and down and inside and outside.

[0008] As a further improvement, multiple sets of stirring blades are arranged symmetrically around the outer rotating shaft, and each set of stirring blades consists of multiple segmented arc-shaped pieces with different torsional angles and are fixed to the connecting shaft.

[0009] As a further improvement, the connecting shaft includes at least two horizontally spaced and parallelly arranged horizontal shafts on the rotating outer shaft, and multiple horizontally spaced cross shafts staggered between the horizontal shafts; the segmented arc-shaped pieces are overlapped on their respective horizontally spaced cross shafts at a preset torsion angle.

[0010] As a further improvement, on both sides of the rotating outer shaft, at least multiple sets of stirring blades are curved along the front and spirally wound from the left side of the upper straight shaft to each cross shaft until they are connected to the right side of the lower straight shaft.

[0011] As a further improvement, the mixing disc is serrated and positioned directly above the bottom outlet.

[0012] As a further improvement, it also includes a mounting bracket horizontally mounted on the mixing tank; the mounting bracket is provided with an upper bearing for mounting the inner rotating shaft and a lower bearing for mounting the outer rotating shaft; the first driving member is disposed on one side of the mounting bracket and is connected to the outer rotating shaft in a driving manner, and the second driving member is disposed on the other side of the mounting bracket and is connected to the inner rotating shaft in a driving manner.

[0013] As a further improvement, the first drive member is connected to the outer rotating shaft via a conveyor belt, and the second drive member is connected to the inner rotating shaft via another conveyor belt. The inner rotating shaft, which is fitted inside the outer rotating shaft, has one end exposed above the outer rotating shaft and connected to the corresponding conveyor belt, while its other end is exposed below the outer rotating shaft for assembling the stirring plate.

[0014] As a further improvement, the inlet height of the foam transfer pipe is located between the height of the mixing plate and the bottom outlet.

[0015] This application also provides a material conveying device, including the above-mentioned rapid pulping and foaming equipment.

[0016] By adopting the above technical solution, the present invention can achieve the following technical effects: 1. The rapid pulping and foaming equipment of this application uses coaxially arranged inner and outer shafts, each driven independently, allowing for separate adjustment of speed and direction of rotation. This enables effective propulsion, circulation, and fine dispersion of the foam while protecting it, improving the flexibility of the pulping raw material mixing process. Furthermore, multiple sets of outer shaft blades and the lowered mixing disc form a composite flow field of up-and-down tumbling and radial propulsion, eliminating blind spots, accelerating material circulation and homogenization, reducing the time to reach the target uniformity, and improving production capacity and energy efficiency. In particular, the mixing disc is located below the blades, and in conjunction with the bottom outlet of the mixing tank, it can tumble and guide the bottom residue to the outlet, reducing bottom blind spots and foam sedimentation and accumulation, facilitating thorough material discharge and continuous switching, and reducing the risk of blockage.

[0017] 2. The foam transfer pipe located on the side introduces the foamed foam into the mixing tank from the middle and lower positions or circumferentially, avoiding single-point impact from the top. This promotes the diffusion of the foam along the side wall or middle layer, allowing it to fully contact the slurry formed on the mixing plate, reducing local enrichment or thinning, thereby improving the mixing uniformity. Furthermore, the side entry, combined with the graded flow field controllable by the inner and outer shafts, allows the foam to be gently introduced with low shear, and then gently dispersed by the mixing plate and blades. This effectively reduces the damage to the bubbles caused by instantaneous high shear, retains a high gas content and stable foam mixing, achieving a more thorough and uniform material mixing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the rapid pulping and foaming equipment according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the rapid pulping and foaming device according to an embodiment of the present invention from another perspective; Figure 3 This is a schematic diagram of the rapid pulping and foaming equipment according to an embodiment of the present invention from other perspectives; Figure 4This is a cross-sectional view of the rapid pulping and foaming equipment according to an embodiment of the present invention; Figure 5 This is a partial disassembly diagram of the rapid pulping and foaming equipment according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the stirring mechanism of the rapid pulping and foaming equipment according to an embodiment of the present invention.

[0019] Icons: 1-Mixing tank; 2-Top opening; 3-Bottom outlet; 4-Stirring mechanism; 5-Foaming mechanism; 6-Foam transfer pipe; 7-Outer rotating shaft; 8-Inner rotating shaft; 9-First driving component; 10-Second driving component; 11-Stirring disc; 12-Connecting shaft; 13-Stirring blade; 14-Straight shaft; 15-Cross shaft; 16-Mounting bracket; 17-Upper bearing component; 18-Lower bearing component; 19-Conveyor belt. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. Example

[0021] Combination Figures 1 to 6This embodiment provides a rapid pulping and foaming device, including a mixing tank 1. The mixing tank 1 has a top opening 2 and a bottom outlet 3. A stirring mechanism 4 and a foaming mechanism 5 are provided in the mixing tank 1. The top opening 2 is used to feed pulping raw materials into the mixing tank 1, and the bottom outlet 3 is used to output the mixed material after stirring when opened. The stirring mechanism 4 includes a coaxially arranged outer rotating shaft 7 and an inner rotating shaft 8, a first driving member 9 that drives the outer rotating shaft 7 to rotate freely, and a second driving member 10 that drives the inner rotating shaft 8 to rotate freely. The inner rotating shaft 8 is relatively independently fitted inside the outer rotating shaft 7. The inner rotating shaft 8 is correspondingly provided with a stirring disc 11 extending into the mixing tank 1. The outer rotating shaft 7 is correspondingly provided with a horizontally arranged connecting shaft 12 and multiple sets of stirring blades 13 wound around the connecting shaft 12. The stirring disc 11 is located below the stirring blades 13, and the stirring disc 11 performs a rapid pulping operation on the pulping raw materials to form a pulp. The foam conveying mechanism 5 includes a foam transfer pipe 6 that connects to the interior of the mixing tank 1 along its side. The foam transfer pipe 6 is used to input foam into the mixing tank 1 to ensure full contact with the slurry. The foam and slurry are thoroughly mixed in the stirring blades 13, thereby cooperating with the stirring plate 11 to uniformly stir the slurry and foam in the mixing tank 1.

[0022] The aforementioned rapid pulping and foaming equipment, through its coaxially arranged inner and outer shafts, each driven independently, allows for separate adjustment of speed and direction of rotation. This enables effective propulsion, circulation, and fine dispersion of the foam while protecting it, improving the flexibility of the pulping raw material mixing process. Furthermore, multiple sets of outer shaft blades and the lowered mixing disc 11 form a composite flow field of up-and-down tumbling and radial propulsion, eliminating blind spots, accelerating material circulation and homogenization, reducing the time to reach the target uniformity, and improving production capacity and energy efficiency. In particular, the mixing disc 11 is located below the blades, and in conjunction with the bottom outlet 3 of the mixing tank 1, it can tumble and guide the bottom residue to the outlet, reducing bottom blind spots and foam sedimentation and accumulation, facilitating thorough material discharge and continuous switching, and reducing the risk of blockage.

[0023] The foam transfer pipe 6 located on the side introduces the foamed foam from the middle and lower position or circumferentially into the mixing tank 1, avoiding single-point impact at the top and promoting the diffusion of foam along the side wall or middle layer, so as to fully contact the slurry formed on the mixing plate, reducing local enrichment or thinning, thereby improving the mixing uniformity. Moreover, the side entry and the flow field that can be controlled in stages by the inner and outer shafts allow the foam to be introduced gently with low shear first, and then gently dispersed by the mixing plate 11 and blades. This can effectively reduce the damage of instantaneous high shear to the bubbles, retain a high gas content and stable foam mixing, and achieve more thorough and uniform material mixing.

[0024] It should be noted that the pulping raw material is specifically a water-liquid mixed powder, which can be fed into the mixing tank 1 after water mixing, or it can be fed in separately. Additionally, the foaming mechanism 5 uses high-pressure gas and foaming agent dilution from the gas-liquid mixture to enter the foam generator to generate foam, which is then fed into the mixing tank 1 and fed laterally to the lower middle part of the tank. The foaming process is existing technology and will not be described in detail here. Furthermore, the bottom outlet 3 of the mixing tank 1 can be opened or closed using an existing valve.

[0025] like Figures 4 to 6 As shown, in this embodiment, the stirring blades 13 are regularly spirally arranged around the rotating outer shaft 7, suitable for tumbling and stirring the slurry and foam vertically and horizontally. The multiple sets of spiral stirring blades 13 simultaneously have axial propulsion and radial pushing functions, continuously pushing the material in the tank from near the inner shaft area outwards and lifting it vertically, forming controlled tumbling and stirring along vertically and horizontally, significantly improving radial and axial circulation and reducing blind spots and short-circuit flow. Furthermore, the foam and slurry mixture near the bottom or inner shaft is lifted and spread to a higher position in the tank, allowing the laterally introduced foam to be gradually torn apart, coated, and evenly distributed, thereby increasing the gas-liquid contact area and diffusion efficiency, facilitating the formation of a uniform and efficient foam cell distribution.

[0026] Furthermore, multiple sets of stirring blades 13 are centrally symmetrically arranged around the outer rotating shaft 7, and each stirring blade 13 consists of multiple segmented arc-shaped pieces fixed to the connecting shaft, with each segmented arc-shaped piece having a different torsional angle. On one hand, the centrally symmetrical arrangement allows the centrifugal force and torque generated by the stirring blades 13 during rotation to cancel each other out or distribute them evenly, reducing unbalanced torque and thus lowering vibration and impact loads on bearings and transmission components, improving mechanical stability and service life. On the other hand, the segmented arc-shaped pieces have a larger working surface, enabling sufficient propulsion and tumbling effects at lower speeds. The arc-shaped profile also makes the streamlines smoother, reducing local impacts and abrupt shearing, minimizing stress concentration, which helps protect shear-sensitive foam structures and achieve gentle, fine dispersion. Moreover, the segmented arc-shaped pieces facilitate welding and fixing of the blades to the connecting shaft and allow for more flexible torsional connections to the shaft at their respective angles.

[0027] Clearly, the stirring blade 13 is multi-segmented and fixed to the connecting shaft 12, eliminating the stress concentration and loosening risks associated with integral welding, improving overall rigidity and fatigue resistance, and making it suitable for long-term continuous operation with longer maintenance intervals. At the same time, the blades directly fixed to the connecting shaft 12 result in a short torque transmission path and good rigidity, reducing energy loss between connecting parts, improving stirring efficiency, and reducing local driving force.

[0028] like Figure 5 and Figure 6As shown, in a preferred embodiment, the connecting shaft 12 includes at least two horizontally spaced and relatively parallel single-section shafts 14 arranged on the rotating outer shaft 7, and a plurality of staggered cross-section shafts 15 arranged at intervals between the horizontally spaced shafts 14. The segmented arc-shaped pieces overlap each other on their respective cross-section shafts 15 at a preset torsion angle. This torsion angle is the oblique overlap angle of the arc-shaped pieces relative to the shaft when they overlap.

[0029] Specifically, on both sides of the rotating outer shaft 7, at least some of the stirring blades 13 are curved along the front side, spirally wound from the left side of the upper straight shaft 14 to each cross shaft 15 until they are joined to the right side of the lower straight shaft 14. Correspondingly, at least some of the stirring blades 13 are curved along the reverse side, spirally wound from the left side of the upper straight shaft 14 to each cross shaft 15 until they are joined to the right side of the lower straight shaft 14.

[0030] In the above-described process, each stirring blade 13, following multiple spiral paths at the top, middle, and bottom, elevates and propels the material in segments, generating both axial upward flow and alternating radial transport. This promotes repeated exchange between the pulping raw materials and foam at different heights and radially, significantly reducing blind zones and short-circuit flows, and improving mixing consistency within the container. Furthermore, the staggered arrangement of the front and back curved blades creates localized opposite or misaligned flow directions, ensuring a uniform spatial distribution of shear energy. This provides necessary shear dispersion locally while avoiding concentrated destruction of bubbles by a single high-shear zone, thus balancing foam integrity and fine dispersion efficiency.

[0031] It should be noted that the staggered cross shafts 15 create thrust points on the stirring blades 13 at different radii and heights. The material is driven by a spiral ascent, lateral dispersion, and descent recirculation path, effectively breaking laminar flow and density stratification, especially effective for systems with uneven gas content, solid phase, or viscosity. Furthermore, the symmetrical and staggered arrangement of the stirring blades 13 results in a more uniform distribution of radial force and torque during rotation, reducing instantaneous unbalanced torque, lowering vibration and wear on bearings and transmission systems, and improving equipment stability and lifespan.

[0032] Meanwhile, the stirring blades 13 extend in multiple segments from top to bottom and cross the central cross shaft 15, which helps to lift the bottom residue in segments and bring it into the main circulation, reducing residue and sedimentation. Combined with the bottom outlet 3, this allows for more thorough discharge and more stable intermittent and continuous switching. The combination of multi-segment spirals and the staggered front and back sides disperses the flow energy into many small, controllable flow units, avoiding the formation of strong central suction vortices or excessive upward floating at the top, thus reducing surface foaming and operational instability.

[0033] In this embodiment, the stirring disc 11 is serrated and positioned directly above the bottom outlet 3. Thus, the serrated disc generates irregular edge impacts and disturbances during rotation, which more easily disperses and upturns stagnant materials and settled particles near the bottom compared to existing smooth discs. Furthermore, this direct action on the material layer above the bottom outlet 3 helps to carry settled or agglomerated materials into the main circulation, significantly reducing the risk of bottom blockage and outlet adhesion.

[0034] like Figure 3 and Figure 5 As shown, in this embodiment, a mounting frame 16 is also included, horizontally mounted on the mixing tank 1. The mounting frame 16 is provided with an upper bearing 17 for housing the rotating inner shaft 8 and a lower bearing 18 for housing the rotating outer shaft 7. The first drive member 9 is disposed on one side of the mounting frame 16 and is drively connected to the rotating outer shaft 7, while the second drive member 10 is disposed on the other side of the mounting frame 16 and is drively connected to the rotating inner shaft 8. Specifically, the mounting frame 16 and its corresponding stirring mechanism 4 are detachably placed directly at the top opening 2 of the mixing tank 1. Clearly, the mounting frame 16, horizontally mounted on the mixing tank 1 and correspondingly provided with upper and lower bearings, provides rigid support for the inner and outer shafts at multiple stress points, reducing the deflection and sway of the long shaft, and minimizing the impact of axial / radial deformation on blade clearance and sealing, thereby improving the predictability of the mixing flow field and the equipment lifespan. In addition, the first drive component 9 and the second drive component 10 are respectively arranged on the left and right sides of the mounting frame 16 and connected to the outer shaft and the inner shaft respectively, so as to facilitate the adjustment of the speed, direction and torque of the two shafts respectively, realize the propulsion and shear separation control, thereby optimizing the mixing curve and foam protection in different pulping raw materials and foam systems.

[0035] The first drive unit 9 is connected to the outer rotating shaft 7 via a conveyor belt 19, and the second drive unit 10 is connected to the inner rotating shaft 8 via another conveyor belt 19. One end of the inner rotating shaft 8, which is fitted inside the outer rotating shaft 7, is exposed above the outer rotating shaft 7 and connected to its corresponding conveyor belt 19, while the other end is exposed below the outer rotating shaft 7 for assembling the stirring plate 11. Specifically, the conveyor belts 19 drive the axial rotation of each shaft by providing a meshing element for the conveyor belts 19 on both drive units and another meshing tooth for the conveyor belts 19 on both the inner and outer shafts. Using two independent conveyor belts 19 to drive the inner and outer shafts respectively facilitates on-site wiring, maintenance, and space optimization, while maintaining the ability for independent speed regulation and independent torque control of the two shafts.

[0036] In one embodiment, the rotational speed of the inner shaft 8 is greater than that of the outer shaft 7, and the rotational directions of the inner and outer shafts are configured such that one rotates forward and the other in reverse. The high speed of the inner shaft is used for rapid pulping, while the low speed of the outer shaft is used for thorough mixing, and the two rotate in opposite directions, creating a significant relative linear velocity difference between the two sets of mixing components, which significantly enhances the shear force and turbulence intensity of the material in the radial and tangential directions.

[0037] Preferably, the inlet height of the foam transfer pipe 6 is located between the heights of the mixing plate 11 and the bottom outlet 3. The inlet height is below the upper limit of the working area of ​​the mixing plate 11, ensuring that the foam does not directly enter the highest shear zone, while being above the bottom outlet 3 prevents the foam from being rapidly drawn away immediately upon entry. This facilitates uniform mixing under moderate disturbance conditions and reduces foam cell rupture. Furthermore, it creates a transition and buffer between the mixing plate 11 and the bottom outlet 3, allowing the foam to gradually integrate with the pulping raw materials in this area, achieving dispersion while avoiding instantaneous high shear damage.

[0038] It should be mentioned that, obviously, there are corresponding flow-guiding ribs (not shown in the figure) on the inner wall of the mixing tank 1. The flow-guiding ribs can block and guide the slurry and foam flowing along the tank wall, break the sliding state against the wall, and promote the material to leave the inner wall and enter the main circulation area, thereby reducing wall adhesion, local deposition and cleaning dead corners.

[0039] In addition, this embodiment also provides a material conveying device, including the aforementioned rapid pulping and foaming equipment. By integrating the rapid pulping and foaming equipment into the material conveying device, the foaming, mixing, and conveying processes form a continuous production line, greatly reducing intermediate transfer, temporary storage, or secondary stirring steps, and improving production efficiency and automation.

[0040] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A rapid pulping and mixing device, characterized in that, Includes a mixing tank; the mixing tank has a top opening and a bottom outlet; the mixing tank is equipped with a stirring mechanism and a foaming mechanism; the top opening is used to feed pulping raw materials into the mixing tank, and the bottom outlet is used to output the mixed material after stirring when opened; The stirring mechanism includes a coaxially arranged outer rotating shaft and an inner rotating shaft, a first driving member that drives the outer rotating shaft to rotate freely, and a second driving member that drives the inner rotating shaft to rotate freely; the inner rotating shaft is relatively independently sleeved inside the outer rotating shaft, the inner rotating shaft is provided with a stirring plate that extends into the mixing tank, and the outer rotating shaft is provided with a horizontally arranged connecting shaft and multiple sets of stirring blades wound around the connecting shaft; The mixing plate is located below the mixing blades, and the mixing plate performs a rapid pulping operation on the pulping raw materials to form a slurry; the foam conveying mechanism includes a foam conveying pipe that is connected to the inside of the mixing tank along the side of the mixing tank. The foam conveying pipe is used to input foam into the mixing tank to fully contact the slurry; the foam and slurry are fully mixed in the mixing blades, so as to cooperate with the mixing plate to uniformly stir the slurry and foam in the mixing tank.

2. The rapid pulping and mixing equipment according to claim 1, characterized in that, The stirring blades are arranged in a regular spiral around the rotating outer shaft, which is suitable for stirring the slurry and foam up and down and inside and outside.

3. The rapid pulping and mixing equipment according to claim 2, characterized in that, Multiple sets of stirring blades are arranged symmetrically around the outer rotating shaft, and each set of stirring blades consists of multiple segmented arc-shaped pieces with different torsional angles and are fixed to the connecting shaft.

4. The rapid pulping and mixing equipment according to claim 3, characterized in that, The connecting shaft includes at least two horizontally spaced and parallelly arranged horizontal shafts on the rotating outer shaft, and multiple horizontally spaced cross shafts staggered between the horizontal shafts; the segmented arc-shaped pieces are overlapped on their respective horizontally spaced cross shafts at a preset torsion angle.

5. The rapid pulping and mixing equipment according to claim 4, characterized in that, On both sides of the rotating outer shaft, at least multiple sets of stirring blades are curved along the front and spirally wound from the left side of the upper straight shaft to each cross shaft until they are connected to the right side of the lower straight shaft.

6. The rapid pulping and mixing equipment according to claim 2, characterized in that, The mixing disc is serrated and positioned directly above the bottom outlet.

7. The rapid pulping and mixing equipment according to claim 1, characterized in that, It also includes a mounting bracket horizontally mounted on the mixing tank; the mounting bracket is provided with an upper bearing for mounting the inner rotating shaft and a lower bearing for mounting the outer rotating shaft; the first driving member is disposed on one side of the mounting bracket and is connected to the outer rotating shaft in a driving manner, and the second driving member is disposed on the other side of the mounting bracket and is connected to the inner rotating shaft in a driving manner.

8. The rapid pulping and mixing equipment according to claim 7, characterized in that, The first driving member is connected to the outer rotating shaft via a conveyor belt, and the second driving member is connected to the inner rotating shaft via another conveyor belt. The inner rotating shaft, which is fitted inside the outer rotating shaft, has one end exposed above the outer rotating shaft and connected to the corresponding conveyor belt, while the other end is exposed below the outer rotating shaft for assembling the stirring plate.

9. The rapid pulping and mixing equipment according to claim 1, characterized in that, The inlet height of the foam transfer pipe is located between the height of the mixing plate and the bottom outlet.

10. A material conveying device, characterized in that, Includes the rapid pulping and mixing equipment as described in any one of claims 1-9.

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