Stirring and mixing device for composite material production

Abstract

A disclosed stirring and mixing device for composite material production comprises a stirring tank body, the outer wall of the top of the stirring tank body is provided with a sealing cover plate, the inner wall of the bottom of the stirring tank body is communicated with a discharging pipe, the bottom of the discharging pipe is fixedly provided with an electric control ball valve through a bolt, and the outer wall of the stirring tank body is sleeved with a cylindrical cooling shell; supporting legs distributed at equal intervals are welded to the outer wall of the bottom of the cylindrical cooling shell, the inner wall of one side of the cylindrical cooling shell communicates with a water inlet pipe, and the bottom of the inner wall of the other side of the cylindrical cooling shell communicates with a water drainage pipe. In the process of mixing and stirring silicon carbide, in order to reduce an interface reaction, a continuously flowing cooling medium is matched with mutual contact of a cylindrical cooling shell, a rotating sleeve and a stirring shaft, so that efficient cooling of the stirring shaft and the rotating sleeve can be realized, and temperature rise caused by heat generated by friction in the stirring process is inhibited; therefore, the interface reaction is inhibited.

Description

Technical Field

[0001] The invention relates to the technical field of stirring equipment, in particular to a stirring and mixing device for producing composite materials. Background Art

[0002] Silicon carbide aluminum ceramic composite material is a typical particle-reinforced metal matrix composite material, which utilizes the characteristics of aluminum alloy matrix such as lightweight, high specific strength, good plastic processing, low density, and the advantages of silicon carbide particles such as high hardness, low thermal expansion coefficient, high wear resistance, and fast thermal conductivity. It is a new generation of structural materials developed after Al alloy and Ti alloy. Aluminum ceramic silicon carbide Al\Sic composite material has the advantages of lightweight, high strength and stiffness, super wear resistance, high temperature stability and corrosion resistance, small thermal expansion coefficient, high thermal conductivity and adjustable thermal expansion coefficient. It is widely used in aerospace, transportation, electronics, military industry, precision instruments and optical instruments, and shipbuilding. In addition, it can be used as heat dissipation and packaging materials in the electronics industry. In the preparation process of silicon carbide aluminum ceramic composite materials, it is necessary to use an external stirring and mixing device to mix them, but there are still some problems in the use of existing stirring and mixing devices:

[0003] 1. Small shear force and poor mixing effect. In the process of mixing and stirring the raw materials, the existing mixing device for mixing silicon carbide aluminum ceramic composite materials cannot effectively break up the silicon carbide aluminum ceramic composite materials due to the large shear force set between the stirring part inside and the silicon carbide aluminum ceramic composite materials, resulting in an unsatisfactory overall mixing effect.

[0004] 2. Intensified interface reaction. In the process of mixing the raw materials of silicon carbide aluminum-ceramic composite materials with existing mixing and stirring devices, solid silicon carbide particles are mixed with liquid aluminum or aluminum alloy, and the silicon carbide particles are evenly dispersed in the aluminum matrix through stirring and other processes. After long-term stirring and friction, the internal temperature of the already high-temperature liquid aluminum will gradually increase, and the high temperature may cause the interface reaction between silicon carbide and aluminum-based materials to intensify, forming brittle intermetallic compounds such as Al4C3. The formation of these compounds will reduce the toughness and strength of the material and affect the overall performance of the composite material. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a stirring and mixing device for composite material production.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A stirring and mixing device for composite material production, comprising a stirring tank body, wherein the top outer wall of the stirring tank body is provided with a sealing cover plate, and the bottom inner wall of the stirring tank body is connected with a discharge pipe, an electric-controlled ball valve is fixed to the bottom of the discharge pipe by bolts, and a cylindrical cooling shell is sleeved on the outer wall of the stirring tank body, and supporting legs distributed at equal distances are welded to the outer wall of the bottom of the cylindrical cooling shell, an inner wall on one side of the cylindrical cooling shell is connected with a water inlet pipe, and the bottom of the inner wall on the other side of the cylindrical cooling shell is connected with a drain pipe;

[0008] A cylindrical cooling shell is installed at the top axis of the sealing cover plate, and a rotating sleeve is rotatably connected at the axis of the cylindrical cooling shell, a stirring shaft is rotatably arranged on the inner wall of the rotating sleeve, and a first stirring blade is welded on the bottom outer wall of the rotating sleeve, a second stirring blade is welded on the bottom outer wall of the stirring shaft, and a first bevel gear is welded on the top outer wall of the rotating sleeve, a second bevel gear is welded on the top of the stirring shaft, a third bevel gear is meshed between the second bevel gear and the first bevel gear, and a servo motor is connected at the axis of the third bevel gear.

[0009] As a further solution of the present invention: the outer wall of the mixing tank body located in the cylindrical cooling shell is fixed with a fastening ring by bolts, and the outer wall at the bottom of the fastening ring is welded with arc-shaped heat-conducting fins distributed at equal distances, and the arc-shaped heat-conducting fins are close to the outer wall around the mixing tank body.

[0010] As a further solution of the present invention: a liquid inlet pipe is connected to the bottom of the inner wall of one side of the cylindrical cooling shell, and the end of the liquid inlet pipe is connected to a micro lift pump, the water inlet of the micro lift pump is connected to a liquid storage shell through a conduit, and a liquid discharge pipe is arranged between the liquid storage shell and the cylindrical cooling shell.

[0011] As a further solution of the present invention: the inner wall of the liquid storage shell is embedded with semiconductor cooling plates distributed at equal distances, and the heat absorbing surface of the semiconductor cooling plates faces the inner wall of the liquid storage shell, and the heat dissipating surface of the semiconductor cooling plates faces the outer wall.

[0012] As a further solution of the present invention: a second annular positioning groove is formed on the inner wall of the rotating sleeve, and a first annular positioning groove is formed on the outer wall of the stirring shaft, and a ball is rolledly arranged between the first annular positioning groove and the second annular positioning groove.

[0013] As a further solution of the present invention: the first stirring blade is located directly above the second stirring blade, and the rotation direction of the first stirring blade is opposite to the rotation direction of the second stirring blade.

[0014] As a further solution of the present invention: each layer of the first stirring blades and the second stirring blades are odd-numbered 5-tooth blades, and the angle between adjacent first stirring blades and second stirring blades is 36°.

[0015] As a further solution of the present invention: the top outer wall of the sealing cover plate is connected with a feed pipe, and a feed hopper is welded to the top outer wall of the feed pipe, and a sealing card cover is hinged at one end of the top of the feed hopper.

[0016] As a further solution of the present invention: the inner wall of the feed pipe is hingedly installed with symmetrically distributed rectangular partition plates, and a torsion spring is installed between the bottom of the feed pipe and the rectangular partition plates.

[0017] Compared with the prior art, the present invention provides a stirring and mixing device for composite material production, which has the following beneficial effects:

[0018] 1. The stirring and mixing device of this design drives the first bevel gear and the second bevel gear to rotate in opposite directions at the same time through a servo motor, thereby driving the first stirring blade and the second stirring blade at the bottom to rotate in opposite directions. Combined with the 5-tooth blade design, a large shear force can be generated during the stirring process, making the silicon carbide more evenly dispersed.

[0019] 2. The stirring and mixing device of this design, in the process of mixing and stirring silicon carbide, utilizes a continuously flowing cooling medium in combination with the mutual contact between the cylindrical cooling shell and the rotating sleeve and the stirring shaft to reduce the interface reaction, thereby being able to achieve efficient cooling of the stirring shaft and the rotating sleeve, suppressing the temperature increase caused by frictional heat during the stirring process, thereby suppressing the occurrence of interface reaction.

[0020] 3. In the stirring and mixing device of this design, during the stirring and mixing process of the silicon carbide composite material, a continuously flowing cold water is arranged on the outside of the stirring tank, and the device is combined with a quickly detachable arc-shaped heat-conducting fin, so that the high temperature generated by long-term stirring can be suppressed, and the stirring and mixing process can be kept within a suitable range for a long time, thereby accelerating the mixing and stirring effect.

[0021] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a stirring and mixing device for composite material production proposed by the present invention;

[0023] Figure 2 This is a side view of the overall structure of a stirring and mixing device for composite material production proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the external structure of a stirring tank of a stirring and mixing device for composite material production proposed by the present invention;

[0025] Figure 4 A top view of the overall structure of a stirring and mixing device for composite material production proposed by the present invention;

[0026] Figure 5 This is a schematic structural diagram from a first perspective of a stirring and mixing device for composite material production proposed by the present invention;

[0027] Figure 6 This is a partial structural schematic diagram of a stirring and mixing device for composite material production proposed by the present invention.

[0028] In the figure: 1, stirring tank body; 2, sealing cover plate; 3, discharge pipe; 4, electric control ball valve; 5, cylindrical cooling shell; 6, supporting leg; 7, water inlet pipe; 8, drain pipe; 9, fastening ring; 10, arc-shaped heat-conducting fins; 11, cylindrical cooling shell; 12, liquid inlet pipe; 13, micro lift pump; 14, liquid storage shell; 15, discharge pipe; 16, semiconductor refrigeration plate; 17, feed pipe; 18, feed hopper; 19, sealing card cover; 20, rectangular partition plate; 21, torsion spring; 22, rotating sleeve; 23, stirring shaft; 24, first annular positioning groove; 25, second annular positioning groove; 26, ball; 27, first stirring blade; 28, second stirring blade; 29, first bevel gear; 30, second bevel gear; 31, third bevel gear; 32, servo motor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1:

[0031] A stirring and mixing device for composite material production, in this embodiment, as Figure 1-6 As shown, it comprises a stirring tank body 1, the top outer wall of the stirring tank body 1 is provided with a sealing cover plate 2, and the bottom inner wall of the stirring tank body 1 is connected with a discharge pipe 3, the bottom of the discharge pipe 3 is fixed with an electric control ball valve 4 by bolts, and the outer wall of the stirring tank body 1 is sleeved with a cylindrical cooling shell 5, the bottom outer wall of the cylindrical cooling shell 5 is welded with supporting legs 6 distributed at equal distances, the inner wall of one side of the cylindrical cooling shell 5 is connected with a water inlet pipe 7, and the bottom of the inner wall of the other side of the cylindrical cooling shell 5 is connected with a drain pipe 8;

[0032] The servo motor 32 drives the first bevel gear 29 and the second bevel gear 30 to rotate in opposite directions at the same time, thereby driving the first stirring blade 27 and the second stirring blade 28 at the bottom to rotate in opposite directions. The 5-tooth blade design can generate a large shear force during the stirring process, making the silicon carbide more evenly dispersed.

[0033] The outer wall of the mixing tank body 1 located at the cylindrical cooling shell 5 is fixed with a fastening collar 9 by bolts, and the outer wall at the bottom of the fastening collar 9 is welded with arc-shaped heat-conducting fins 10 distributed at equal distances, and the arc-shaped heat-conducting fins 10 are closely attached to the outer wall of the mixing tank body 1;

[0034] A cylindrical cooling shell 11 is installed at the top axis of the sealing cover plate 2, and a liquid inlet pipe 12 is connected to the bottom of the inner wall of one side of the cylindrical cooling shell 11, and the end of the liquid inlet pipe 12 is connected to a micro lift pump 13, and the water inlet of the micro lift pump 13 is connected to a liquid storage shell 14 through a conduit, and a liquid discharge pipe 15 is provided between the liquid storage shell 14 and the cylindrical cooling shell 11, and the inner wall of the liquid storage shell 14 is embedded with semiconductor cooling sheets 16 distributed at equal distances, and the heat absorption surface of the semiconductor cooling sheet 16 faces the inner wall of the liquid storage shell 14, and the heat dissipation surface of the semiconductor cooling sheet 16 faces the outer wall;

[0035] In the process of mixing and stirring silicon carbide, in order to reduce the interface reaction, the cooling medium that continuously flows is used in conjunction with the mutual contact between the columnar cooling shell 11, the rotating sleeve 22 and the stirring shaft 23, so that the stirring shaft 23 and the rotating sleeve 22 can be efficiently cooled, and the temperature rise caused by frictional heat generation during the stirring process can be suppressed, thereby suppressing the occurrence of interface reaction;

[0036] A rotating sleeve 22 is rotatably connected to the axis of the cylindrical cooling shell 11, a stirring shaft 23 is rotatably provided on the inner wall of the rotating sleeve 22, a first stirring blade 27 is welded to the outer wall of the bottom of the rotating sleeve 22, a second stirring blade 28 is welded to the outer wall of the bottom of the stirring shaft 23, a first bevel gear 29 is welded to the outer wall of the top of the rotating sleeve 22, a second bevel gear 30 is welded to the top of the stirring shaft 23, a third bevel gear 31 is meshed between the second bevel gear 30 and the first bevel gear 29, and a servo motor 32 is connected to the axis of the third bevel gear 31;

[0037] Each layer of the first stirring blades 27 and the second stirring blades 28 are odd-tooth 5-tooth blades, and the angle between adjacent first stirring blades 27 and second stirring blades 28 is 36°. The top outer wall of the sealing cover plate 2 is connected to a feed pipe 17, and a feed hopper 18 is welded to the top outer wall of the feed pipe 17. A sealing card cover 19 is hinged at one end of the top of the feed hopper 18. The inner wall of the feed pipe 17 is hingedly installed with symmetrically distributed rectangular partition plates 20, and a torsion spring 21 is installed between the bottom of the feed pipe 17 and the rectangular partition plates 20.

[0038] When the present embodiment is used, firstly, the arc-shaped heat-conducting fins 10 are fixed to the outer wall of the stirring tank body 1 by means of the fastening collar 9, and then the stirring tank body 1 is placed inside the cylindrical cooling shell 5, and then the silicon carbide composite material to be stirred is poured into the stirring tank body 1, and then the servo motor 32 is started, and the servo motor 32 is used to drive the third bevel gear 31 to rotate, and then the third bevel gear 31 meshes with the first bevel gear 29 and the second bevel gear 30 to mesh and rotate, and the first bevel gear 29 drives the rotating sleeve 22 to rotate, and the second bevel gear drives the stirring shaft 23 to rotate, so as to realize the first stirring blade 27 and the second stirring blade at the bottom. The sheets 28 rotate in the opposite direction at the same time to achieve shear stirring of the silicon carbide composite material. The continuous friction during the stirring process generates heat, which will trigger an interface reaction, thereby starting the micro-lift pump 13 to pump the cooling medium inside the liquid storage shell 14 into the cylindrical cooling shell 11, and use heat conduction to cool the rotating sleeve 22 and the stirring shaft 23. The heated medium is cooled by the semiconductor refrigeration sheet 16 to maintain efficient cooling. If the temperature is still too high, cold water is continuously input into the water inlet pipe 7, and the flowing cold water is used to take away the excess heat generated inside the stirring tank 1, thereby cooling the temperature and maintaining the stirring reaction temperature at a suitable temperature.

[0039] Embodiment 2:

[0040] A stirring and mixing device for composite material production, such as Figure 1-6 As shown, the present embodiment makes the following supplements on the basis of the embodiment 1: the inner wall of the rotating sleeve 22 is provided with a second annular positioning groove 25, and the outer wall of the stirring shaft 23 is provided with a first annular positioning groove 24, a ball 26 is arranged rollingly between the first annular positioning groove 24 and the second annular positioning groove 25, the first stirring blade 27 is located directly above the second stirring blade 28, and the rotation direction of the first stirring blade 27 is opposite to the rotation direction of the second stirring blade 28;

[0041] When this embodiment is used, during the process of stirring and mixing the silicon carbide composite material, a continuously flowing cold water is set on the outside of the stirring tank body 1, and the arc-shaped heat-conducting fins 10 that can be quickly disassembled are used to suppress the high temperature generated by long-term stirring, so that the stirring and mixing process can be kept within a suitable range for a long time, thereby accelerating the mixing and stirring effect.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stirring and mixing device for composite material production, comprising a stirring tank (1), characterized in that: The top outer wall of the stirring tank body (1) is provided with a sealing cover plate (2), and the bottom inner wall of the stirring tank body (1) is connected to a discharge pipe (3), the bottom of the discharge pipe (3) is fixed with an electric control ball valve (4) by bolts, and the outer wall of the stirring tank body (1) is sleeved with a columnar cooling shell (5), and the bottom outer wall of the columnar cooling shell (5) is welded with support legs (6) distributed at equal distances, the inner wall of one side of the columnar cooling shell (5) is connected to a water inlet pipe (7), and the bottom of the inner wall of the other side of the columnar cooling shell (5) is connected to a drain pipe (8), and the; A cylindrical cooling shell (11) is installed at the top axis of the sealing cover plate (2), and a rotating sleeve (22) is rotatably connected to the axis of the cylindrical cooling shell (11), a stirring shaft (23) is rotatably arranged on the inner wall of the rotating sleeve (22), and a first stirring blade (27) is welded to the bottom outer wall of the rotating sleeve (22), a second stirring blade (28) is welded to the bottom outer wall of the stirring shaft (23), and a first bevel gear (29) is welded to the top outer wall of the rotating sleeve (22), a second bevel gear (30) is welded to the top of the stirring shaft (23), a third bevel gear (31) is meshed between the second bevel gear (30) and the first bevel gear (29), and a servo motor (32) is connected to the axis of the third bevel gear (31).

2. A stirring and mixing device for composite material production according to claim 1, characterized in that: The outer wall of the stirring tank body (1) located on the cylindrical cooling shell (5) is fixed with a fastening ring (9) by bolts, and the outer wall at the bottom of the fastening ring (9) is welded with arc-shaped heat-conducting fins (10) distributed at equal distances, and the arc-shaped heat-conducting fins (10) are closely attached to the outer wall of the stirring tank body (1) on all sides.

3. A stirring and mixing device for composite material production according to claim 1, characterized in that: A liquid inlet pipe (12) is connected to the bottom of the inner wall of one side of the columnar cooling shell (11), and the end of the liquid inlet pipe (12) is connected to a micro lift pump (13). The water inlet of the micro lift pump (13) is connected to a liquid storage shell (14) via a conduit, and a liquid discharge pipe (15) is provided between the liquid storage shell (14) and the columnar cooling shell (11).

4. A stirring and mixing device for composite material production according to claim 3, characterized in that: The inner wall of the liquid storage shell (14) is embedded with semiconductor cooling sheets (16) distributed at equal distances, and the heat absorption surface of the semiconductor cooling sheet (16) faces the inner wall of the liquid storage shell (14), and the heat dissipation surface of the semiconductor cooling sheet (16) faces the outer wall.

5. A stirring and mixing device for composite material production according to claim 1, characterized in that: The inner wall of the rotating sleeve (22) is provided with a second annular positioning groove (25), and the outer wall of the stirring shaft (23) is provided with a first annular positioning groove (24), and a ball (26) is arranged to roll between the first annular positioning groove (24) and the second annular positioning groove (25).

6. A stirring and mixing device for composite material production according to claim 1, characterized in that: The first stirring blade (27) is located directly above the second stirring blade (28), and the rotation direction of the first stirring blade (27) is opposite to the rotation direction of the second stirring blade (28).

7. A stirring and mixing device for composite material production according to claim 6, characterized in that: Each layer of the first stirring blades (27) and the second stirring blades (28) are odd-numbered 5-tooth blades, and the angle between adjacent first stirring blades (27) and second stirring blades (28) is 36°.

8. A stirring and mixing device for composite material production according to claim 1, characterized in that: The top outer wall of the sealing cover plate (2) is connected to a feed pipe (17), and a feed hopper (18) is welded to the top outer wall of the feed pipe (17), and a sealing card cover (19) is hinged at one end of the top of the feed hopper (18).

9. A stirring and mixing device for composite material production according to claim 8, characterized in that: The inner wall of the feed pipe (17) is hingedly mounted with symmetrically distributed rectangular partition plates (20), and a torsion spring (21) is mounted between the bottom of the feed pipe (17) and the rectangular partition plates (20).

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