A foaming device and method for preparing geopolymers based on fly ash

Abstract

The present invention discloses a foaming device and method for preparing geopolymers based on fly ash, which relates to the technical field of stirring and foaming. It includes a bracket fixed on the ground; a foaming chamber fixed on the bracket, and a slurry inlet and a foaming agent inlet are provided at the upper end of the foaming chamber, and a discharge port is provided at the lower end surface of the foaming chamber; a fixed disk fixed inside the foaming chamber; a stirring motor fixed on the upper end surface of the foaming chamber; a driving component rotatably arranged in the fixed disk and connected to the output shaft of the stirring motor; a main stirring component fixed at the axial center position of the driving component; an auxiliary stirring component configured to be two and symmetrically fixed on the driving component; in the present invention, the main stirring component can stir and mix the slurry and the foaming agent, and the auxiliary stirring component can improve the pore uniformity of the slurry.

Description

Technical Field

[0001] The present invention relates to the technical field of stirring and foaming, and specifically to a foaming device and method for preparing geopolymers based on fly ash. Background Art

[0002] Preparing geopolymers from fly ash is a method that uses fly ash as the main raw material and generates geopolymers through alkali activation reactions. Geopolymers have the characteristics of low carbon and high performance and are ideal materials to replace traditional cement. When making them, it is necessary to first make a slurry, and then put the slurry into a stirring and foaming device for stirring and foaming to obtain the required pore structure.

[0003] When existing stirring and foaming devices are stirring, most of them use anchor-shaped stirring blades. Their structure is single and they cannot allow a small amount of air to enter the bottom of the stirring for mixing, resulting in uneven pores in the slurry. And they carry out stirring and mixing through the eddy current formed by the anchor-shaped stirring blades, and their shearing effect on the slurry is poor, resulting in poor stirring and mixing effect of the slurry and the foaming agent.

[0004] In view of the above problems, the present invention provides a foaming device and method for preparing geopolymers based on fly ash to solve the above problems. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: A foaming device for preparing geopolymers based on fly ash, comprising:

[0006] A bracket, fixed on the ground;

[0007] A foaming chamber, fixed on the bracket, and a slurry inlet and a foaming agent inlet are provided at the upper end of the foaming chamber, and a discharge port is provided at the lower end face of the foaming chamber;

[0008] A fixed disk, fixed inside the foaming chamber;

[0009] A stirring motor, fixed on the upper end face of the foaming chamber;

[0010] A driving assembly, rotatably arranged inside the fixed disk and connected to the output shaft of the stirring motor;

[0011] A main stirring assembly, fixed at the axial center position of the driving assembly;

[0012] Auxiliary stirring assemblies, configured to be two and symmetrically fixed on the driving assembly.

[0013] Further, the driving assembly includes:

[0014] A rotating ring, rotatably arranged inside the fixed disk;

[0015] An internal gear, fixed inside the rotating ring;

[0016] The driven gears are configured in three numbers and are circumferentially arranged on the fixed disk and are all meshed with the internal gear;

[0017] The driving gear is rotatably arranged on the fixed disk, meshed with the three driven gears, and connected to the output shaft of the stirring motor.

[0018] Furthermore, the main stirring assembly includes:

[0019] The main stirring shaft is fixed on the driving gear;

[0020] The stirring blades are slidably arranged on the main stirring shaft and are limited to the main stirring shaft by bolts;

[0021] The anchor-shaped stirring blades are fixed to the lower end of the main stirring shaft.

[0022] Furthermore, the auxiliary stirring assembly includes:

[0023] The auxiliary stirring shaft is fixed on the rotating ring;

[0024] The reset assembly is fixed to the lower end face of the auxiliary stirring shaft;

[0025] The adjusting assembly is fixed to the lower end face of the reset assembly.

[0026] Furthermore, the reset assembly includes:

[0027] The damping columns are fixed to the lower end face of the auxiliary stirring shaft;

[0028] The connecting columns are slidably arranged on the damping columns, and at least two air outlets are provided on the side walls thereof;

[0029] The hydraulic rods are slidably arranged in the damping columns, and one end thereof is fixedly connected to the connecting columns;

[0030] The reset springs are sleeved on the outer walls of the damping columns.

[0031] Furthermore, the adjusting assembly includes:

[0032] The adjusting column is fixed to the lower end face of the reset assembly, and an adjusting chamber is provided inside thereof;

[0033] The lifting column is fixed in the adjusting chamber;

[0034] The adjusting plate is fixed to the output end of the lifting column;

[0035] The reinforcing ring is fixed to the outer wall of the adjusting column;

[0036] The rotating shaft is rotatably arranged on the side walls of the reinforcing ring and the adjusting column, extends into the adjusting bin, and is fixed with a rotating plate;

[0037] The adjusting blade is fixed at one end of the rotating shaft away from the rotating plate;

[0038] The limiting block is fixed at the bottom of the adjusting bin.

[0039] Furthermore, one end of the adjusting plate is hinged to the rotating plate, and the limiting block is located below the hinged position of the adjusting plate and the rotating plate. When the rotating plate is limited by the limiting block, the adjusting blade is in a horizontal state.

[0040] A foaming method for a foaming device for preparing geopolymers based on fly ash includes the following steps:

[0041] S1. Slurry preparation: Mix fly ash, an alkali activator, and an additive to form a slurry;

[0042] S2. Stirring and foaming: Add the mixed slurry into the foaming bin, add a foaming agent into the foaming bin, and then stir and foam through the main stirring assembly;

[0043] S3. Auxiliary stirring: Press a small amount of air to the bottom of the slurry through the downward pressure of the auxiliary stirring assembly, and perform auxiliary stirring through the upward movement of the auxiliary stirring assembly;

[0044] S4. Molding in a mold: Inject the foamed slurry into a mold to form the required shape and size.

[0045] Compared with the prior art, the present invention provides a foaming device and method for preparing geopolymers based on fly ash, having the following beneficial effects:

[0046] Through the main stirring assembly, the present invention can stir and mix the slurry and the foaming agent. Through the auxiliary stirring assembly, the pore uniformity of the slurry can be improved. When the auxiliary stirring assembly stirs, first, the adjusting blade moves towards the slurry through the lifting column. At this time, the adjusting blade is in a horizontal state, carries a small amount of air during movement, and sends a small amount of air into the slurry, increasing the foaming effect at the position where the slurry is not in contact with air inside. Then, the adjusting blade rises through the lifting column. At this time, the adjusting blade forms an angle with the horizontal plane, and the driving assembly makes the adjusting blade and the main stirring assembly rotate in opposite directions, improving the shearing effect on the slurry, making it easier for the slurry to mix with the foaming agent and air. Moreover, the working state of the adjusting blade is a reciprocating motion, thereby providing air for the inside of the slurry in small amounts multiple times, avoiding excessive air resulting in too large pores. Description of the Drawings

[0047] Figure 1 It is a schematic diagram of the overall structure of a foaming device for preparing geopolymers based on fly ash;

[0048] Figure 2 Schematic diagram of the internal structure of the foaming chamber in a foaming device for preparing geopolymers based on fly ash;

[0049] Figure 3 Schematic diagram of the structure of the main stirring assembly in a foaming device for preparing geopolymers based on fly ash;

[0050] Figure 4 Schematic diagram of the structure of the auxiliary stirring assembly in a foaming device for preparing geopolymers based on fly ash;

[0051] In the figure: 1, support; 2, foaming chamber; 21, fixed disk; 22, discharge port; 3, slurry inlet; 4, foaming agent inlet; 5, stirring motor; 7, main stirring assembly; 8, auxiliary stirring assembly; 61, rotating ring; 62, internal gear; 63, driven gear; 64, driving gear; 71, main stirring shaft; 72, stirring blade; 73, anchor-shaped stirring blade; 81, auxiliary stirring shaft; 82, reset assembly; 83, adjustment assembly; 821, connecting column; 822, air outlet; 823, damping column; 824, hydraulic rod; 825, reset spring; 831, adjustment column; 832, adjustment chamber; 833, lifting column; 834, adjustment plate; 835, reinforcement ring; 836, rotating shaft; 837, adjustment blade; 838, rotating plate; 839, limiting block. Detailed implementation manners

[0052] Referring to Figures 1 - 4 , the present invention provides a technical solution: A foaming device for preparing geopolymers based on fly ash, comprising:

[0053] Support 1, fixed on the ground;

[0054] Foaming chamber 2, fixed on the support 1, and a slurry inlet 3 and a foaming agent inlet 4 are opened at the upper end of the foaming chamber 2, and a discharge port 22 is opened at the lower end surface of the foaming chamber 2;

[0055] Fixed disk 21, fixed inside the foaming chamber 2;

[0056] Stirring motor 5, fixed on the upper end surface of the foaming chamber 2;

[0057] Drive assembly, rotatably arranged inside the fixed disk 21 and connected to the output shaft of the stirring motor 5;

[0058] Main stirring assembly 7, fixed at the axial center position of the drive assembly;

[0059] Auxiliary stirring assembly 8, configured to be two and symmetrically fixed on the drive assembly.

[0060] In this embodiment, the drive assembly includes:

[0061] The rotating ring 61 is rotatably arranged within the fixed disk 21;

[0062] The internal gear 62 is fixed within the rotating ring 61;

[0063] Three driven gears 63 are arranged circumferentially on the fixed disk 21 and are all meshed with the internal gear 62;

[0064] The driving gear 64 is rotatably arranged on the fixed disk 21, meshes with the three driven gears 63, and is connected to the output shaft of the stirring motor 5.

[0065] Among them, when the driving assembly is operating, the stirring motor 5 drives the driving gear 64 to rotate, then the driving gear 64 drives the driven gears 63 to rotate, the driven gears 63 drive the internal gear 62 to rotate, and the rotation directions of the driving gear 64 and the internal gear 62 are opposite.

[0066] It should be noted that the auxiliary stirring assembly 8 rotates in the same direction as the internal gear 62, and the two auxiliary stirring assemblies 8 revolve around the axis of the main stirring assembly 7.

[0067] As a preferred embodiment, the main stirring assembly 7 includes:

[0068] The main stirring shaft 71 is fixed on the driving gear 64;

[0069] The stirring blades 72 are slidably arranged on the main stirring shaft 71 and are limited to the main stirring shaft 71 by bolts;

[0070] The anchor-shaped stirring blades 73 are fixed to the lower end of the main stirring shaft 71.

[0071] That is to say, the stirring blades 72 can provide assistance for the anchor-shaped stirring blades 73, so that the slurry is more likely to form a vortex, improving the mixing effect, and the height of the stirring blades 72 is flush with the upper surface of the slurry.

[0072] As a preferred embodiment, the auxiliary stirring assembly 8 includes:

[0073] The auxiliary stirring shaft 81 is fixed on the rotating ring 61;

[0074] The reset assembly 82 is fixed to the lower end surface of the auxiliary stirring shaft 81;

[0075] The adjusting assembly 83 is fixed to the lower end surface of the reset assembly 82.

[0076] As a preferred embodiment, the reset assembly 82 includes:

[0077] The damping column 823 is fixed to the lower end surface of the auxiliary stirring shaft 81;

[0078] The connecting column 821 is slidably arranged on the damping column 823, and at least two air outlets 822 are formed in its side wall;

[0079] The hydraulic rod 824 is slidably arranged in the damping column 823, and one end of it is fixedly connected to the connecting column 821;

[0080] The return spring 825 is sleeved on the outer wall of the damping column 823.

[0081] That is to say, the return speed of the return spring 825 can be reduced by the hydraulic rod 824 and the damping column 823.

[0082] As a preferred embodiment, the adjusting assembly 83 includes:

[0083] The adjusting column 831 is fixed on the lower end surface of the reset assembly 82, and an adjusting chamber 832 is formed inside it;

[0084] The lifting column 833 is fixed in the adjusting chamber 832;

[0085] The adjusting plate 834 is fixed at the output end of the lifting column 833;

[0086] The reinforcing ring 835 is fixed on the outer wall of the adjusting column 831;

[0087] The rotating shaft 836 is rotatably arranged on the side walls of the reinforcing ring 835 and the adjusting column 831, and it extends into the adjusting chamber 832 and is fixed with a rotating plate 838;

[0088] The adjusting blade 837 is fixed at one end of the rotating shaft 836 far from the rotating plate 838;

[0089] The limiting block 839 is fixed at the bottom of the adjusting chamber 832.

[0090] Among them, when the auxiliary stirring assembly 8 operates, first, the adjusting blade 837 is controlled by the lifting column 833 to move towards the slurry. At this time, the adjusting blade 837 is in a horizontal state, and a small amount of air is carried during the movement and sent into the slurry, increasing the foaming effect at the positions in the slurry that are not in contact with air. Then, the adjusting blade 837 rises through the lifting column 833. At this time, the adjusting blade 837 forms an angle with the horizontal plane, and the driving assembly makes the adjusting blade 837 and the main stirring assembly 7 rotate in opposite directions, improving the shearing effect on the slurry, making it easier for the slurry to mix with the foaming agent and air, and the working state of the adjusting blade 837 is a reciprocating motion.

[0091] As a preferred embodiment, the adjusting plate 834 is hinged to one end of the rotating plate 838, and the limiting block 839 is located below the hinged position of the adjusting plate 834 and the rotating plate 838. When the rotating plate 838 is limited by the limiting block 839, the adjusting blade 837 is in a horizontal state.

[0092] It should be noted that the initial state of the adjusting blade 837 is an inclined state. When the lifting column 833 moves downward, at this time, the rotating plate 838 is pushed to rotate by the adjusting plate 834, so that the rotating plate 838 contacts and is limited by the limiting block 839. At this time, the adjusting blade 837 is in a horizontal state. Then the lifting column 833 continues to move downward, pushing the adjusting column 831 and the connecting column 821 to slide downward, so that the adjusting plate 834 moves toward the slurry. When the lifting column 833 moves upward, its initial moving speed is greater than the reset speed of the return spring 825, so that the adjusting blade 837 is in the initial state. At this time, the end of the rotating plate 838 away from the adjusting blade 837 contacts and is limited by the bottom of the adjusting bin 832. Then the rising speed of the lifting column 833 is made consistent with the reset speed of the return spring 825, so as to keep the adjusting blade 837 in an inclined state, which is convenient for forming a shear force on the slurry.

[0093] A foaming method for a foaming device for preparing geopolymers based on fly ash includes the following steps:

[0094] S1. Slurry preparation; mixing fly ash, an alkali activator, and an additive to form a slurry;

[0095] S2. Stirring and foaming; adding the mixed slurry into the foaming bin 2, adding a foaming agent into the foaming bin 2, and then stirring and foaming through the main stirring component 7; wherein, the slurry is added through the slurry inlet 3, and the foaming agent is added through the foaming agent inlet 4;

[0096] S3. Auxiliary stirring; pressing a small amount of air to the bottom of the slurry by pressing down the auxiliary stirring component 8, and performing auxiliary stirring by the rising of the auxiliary stirring component 8;

[0097] Among them, during auxiliary stirring, first, the adjusting blade 837 is moved toward the slurry through the lifting column 833. At this time, the adjusting blade 837 is in a horizontal state. When moving, it carries a small amount of air and sends the small amount of air into the slurry, increasing the foaming effect at the position where the slurry is not in contact with air inside. Then the adjusting blade 837 rises through the lifting column 833. At this time, the adjusting blade 837 forms an angle with the horizontal plane, and the driving component makes the adjusting blade 837 and the main stirring component 7 rotate in opposite directions, improving the shearing effect on the slurry, making it easier for the slurry to mix with the foaming agent and air, and the working state of the adjusting blade 837 is a reciprocating motion;

[0098] S4. Molding with a mold; injecting the foamed slurry into a mold to form the required shape and size.

[0099] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A foaming device for preparing geopolymers based on fly ash, characterized in that, Including: A bracket (1), fixed to the ground; A foaming bin (2), fixed to the bracket (1), and a slurry inlet (3) and a foaming agent inlet (4) are provided at the upper end of the foaming bin (2), and a discharge port (22) is provided at the lower end surface of the foaming bin (2); A fixed disk (21), fixed inside the foaming bin (2); A stirring motor (5), fixed to the upper end surface of the foaming bin (2); A driving assembly, rotatably arranged inside the fixed disk (21) and connected to the output shaft of the stirring motor (5); A main stirring assembly (7), fixed at the axial center position of the driving assembly; Auxiliary stirring assemblies (8), configured to be two, symmetrically fixed to the driving assembly; The driving assembly includes: A rotating ring (61), rotatably arranged inside the fixed disk (21); An internal gear (62), fixed inside the rotating ring (61); Driven gears (63), configured to be three, circumferentially arranged on the fixed disk (21) and all meshed with the internal gear (62); A driving gear (64), rotatably arranged on the fixed disk (21), meshed with the three driven gears (63) and connected to the output shaft of the stirring motor (5); The auxiliary stirring assembly (8) includes: An auxiliary stirring shaft (81), fixed to the rotating ring (61); A reset assembly (82), fixed to the lower end surface of the auxiliary stirring shaft (81); An adjusting assembly (83), fixed to the lower end surface of the reset assembly (82); The adjusting assembly (83) includes: An adjusting column (831), fixed to the lower end surface of the reset assembly (82), and an adjusting chamber (832) is provided inside it; A lifting column (833), fixed inside the adjusting chamber (832); An adjusting plate (834), fixed to the output end of the lifting column (833); A reinforcing ring (835), fixed to the outer wall of the adjusting column (831); A rotating shaft (836), rotatably arranged on the side walls of the reinforcing ring (835) and the adjusting column (831), and extending into the adjusting chamber (832), and a rotating plate (838) is fixed to it; An adjusting blade (837), fixed to the end of the rotating shaft (836) away from the rotating plate (838); A limiting block (839), fixed to the bottom of the adjusting chamber (832); The method for foaming using the above-mentioned foaming equipment for preparing geopolymers based on fly ash includes the following steps: S1. Slurry preparation; Mix fly ash, an alkali activator, and an additive to form a slurry; S2. Stirring and foaming; Add the mixed slurry into the foaming bin (2), add a foaming agent into the foaming bin (2), and then stir and foam through the main stirring assembly (7); S3. Auxiliary stirring; Press a small amount of air to the bottom of the slurry through the downward pressure of the auxiliary stirring assembly (8), and perform auxiliary stirring through the upward movement of the auxiliary stirring assembly (8); S4. Mold forming; Inject the foamed slurry into a mold to form the required shape and size.

2. The foaming device for preparing geopolymers based on fly ash according to claim 1, characterized in that, The main stirring assembly (7) includes: A main stirring shaft (71), fixed to the driving gear (64); Stirring blades (72), slidably arranged on the main stirring shaft (71) and limited to the main stirring shaft (71) by bolts; Anchor-shaped stirring blades (73), fixed to the lower end of the main stirring shaft (71).

3. The foaming device for preparing geopolymers based on fly ash according to claim 1, characterized in that, The reset component (82) includes: A damping column (823) fixed to the lower end face of the auxiliary stirring shaft (81); A connecting column (821) slidably arranged on the damping column (823), and at least two air outlets (822) are formed in the side wall thereof; A hydraulic rod (824) slidably arranged in the damping column (823), and one end thereof is fixedly connected to the connecting column (821); A reset spring (825) sleeved on the outer wall of the damping column (823).

4. A foaming device for preparing geopolymers based on fly ash according to claim 1, characterized in that, The adjusting plate (834) is hinged to one end of the rotating plate (838), and the limiting block (839) is located below the hinged position of the adjusting plate (834) and the rotating plate (838). When the rotating plate (838) is limited by the limiting block (839), the adjusting blade (837) is in a horizontal state.

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