A separation device for producing foam ceramics

Abstract

The present invention relates to the technical field of powder screening, and specifically discloses a separation device for foam ceramic production, including a separation tank with openings at both ends, and a separation assembly horizontally arranged in the separation tank; the separation assembly includes a sieve drum, an air intake pipe connected to one end of the sieve drum, an exhaust pipe connected to the other end of the sieve drum, an air compressor connected to the air intake pipe, a plurality of sieve holes opened on the side wall of the sieve drum, a spiral scraper rotatably arranged on the inner wall of the sieve drum, and a convex block arranged on the inner wall of the sieve drum; the air intake pipe and the exhaust pipe are both fixedly arranged on the side wall of the separation tank, and a gap is arranged between the scraper and the inner wall of the sieve drum. The separation device for foam ceramic production of the present invention can efficiently separate ceramic powder according to particle size.

Description

Technical Field

[0001] The invention relates to the technical field of powder screening, in particular to a separation device for producing foam ceramics. Background Art

[0002] The development of foam ceramic material began in the 1970s. It is a porous material with high temperature characteristics. Its pore size ranges from nanometer to micrometer, the porosity is between 20% and 95%, and the operating temperature is room temperature to 1600℃.

[0003] There are many methods for preparing foam ceramics, such as foaming method, sol-gel method, adding pore-forming agent method, organic precursor impregnation method, etc., but most of the production methods need to use ceramic powder as raw material. Ceramic powder can be obtained by crushing and grinding the ceramic raw material. The particle size and particle size distribution of ceramic powder are very important for foam ceramic products. It will affect the pore size, porosity, structural strength and other parameters of foam ceramics. Ceramic powders with different particle sizes and different particle size distributions can be used to prepare foam ceramics with different properties. Therefore, before producing foam ceramic products, it is necessary to screen the ceramic powder according to the particle size, and then add ceramic powders of different particle sizes according to the proportion as needed (or ceramic powders of a certain particle size can be used alone). Due to the small particle size of ceramic powder, the separation effect of using traditional sieve plates, screens, etc. is not good. The ceramic powder itself is not a regular sphere, and most of them are irregular, so it is easy to get stuck in the sieve plate and screen, and the sieve plate needs to be cleaned frequently. Therefore, a separation device with better separation effect for ceramic powder can be designed. Summary of the invention

[0004] The object of the present invention is to provide a separation device for producing foam ceramics, which can efficiently separate ceramic powder according to particle size.

[0005] The present invention is achieved through the following technical scheme: the separation device for foam ceramic production of the present invention comprises a separation tank with openings at both ends, and a separation component horizontally arranged in the separation tank; the separation component comprises a sieve cylinder, an air inlet pipe connected to one end of the sieve cylinder, an exhaust pipe connected to the other end of the sieve cylinder, an air compressor connected to the air inlet pipe, a plurality of sieve holes opened on the side wall of the sieve cylinder, a spiral scraper rotatably arranged on the inner wall of the sieve cylinder, and a protrusion arranged on the inner wall of the sieve cylinder; the air inlet pipe and the exhaust pipe are both fixedly arranged on the side wall of the separation tank, and a gap is arranged between the scraper and the inner wall of the sieve cylinder.

[0006] Furthermore, a horizontally arranged guide rod is provided inside the screen drum, and the guide rod is connected to the scraper through a plurality of first connecting rods; the guide rod is arranged inside the scraper, and a gap is provided between the guide rod and the scraper; the two ends of the guide rod are rotatably connected to the intake pipe and the exhaust pipe respectively.

[0007] Furthermore, both ends of the guide rod are connected to fixed rods, and the outer wall of the fixed rod is sleeved with a bearing, and the bearing is respectively connected to the intake pipe and the exhaust pipe through a second connecting rod.

[0008] Furthermore, the guide rod is a hollow and closed structure, and a horizontally arranged heating wire is provided inside the guide rod. Both ends of the heating wire pass through the fixing rod and are connected to the power supply device.

[0009] Furthermore, connecting pipes are fixedly provided at both ends of the sieve drum, and the air inlet pipe and the exhaust pipe are fixedly connected to a pair of the connecting pipes respectively; the connecting pipes are made of elastic rubber material.

[0010] Furthermore, a pair of the protrusions is provided, and the pair of the protrusions are respectively arranged on two opposite sides of the screen drum along the horizontal direction.

[0011] Furthermore, the convex block is arranged at the middle part of the screen drum along the axial direction, and the convex block is hemispherical.

[0012] Furthermore, there are multiple separation components, and the multiple separation components are all arranged horizontally, and the multiple separation components are arranged in an inverted triangle shape in the separation tank.

[0013] Furthermore, the separation tank is in an inverted triangle structure, and a feed frame is provided at the upper end of the separation tank.

[0014] The technical solution of the present invention has at least the following advantages and beneficial effects: when using the separation device for foam ceramic production of the present invention, ceramic powder is added into the separation tank, and the air compressor pumps the high-speed airflow into the sieve cylinder through the air inlet pipe, and then discharges it from the exhaust pipe. According to Bernoulli's principle, the gas flow rate in the sieve cylinder is significantly higher than that outside the sieve cylinder, so the pressure inside the sieve cylinder is small, and the ceramic powder in the separation tank passes through the sieve holes and enters the sieve cylinder, and is discharged from the exhaust pipe with the high-speed airflow. By setting the corresponding sieve hole size, the ceramic powder below the size can be separated from the separation tank. During the separation process, the high-speed airflow will also drive the spiral scraper to rotate with the axis of the screen drum as the center. During the rotation, the ceramic powder stuck in the screen holes can be scraped off to prevent it from clogging the screen holes. During the circular motion of the scraper, it will periodically hit the bumps, thereby causing periodic vibration of the screen drum by hitting the bumps. The vibration of the screen drum can better vibrate the ceramic powder in the separation tank and promote its rapid flow, so that the screen drum can more fully contact the low-particle size powder in the ceramic powder and suck it into the inside of the screen drum. The vibration of the screen drum can also better prevent the screen holes from being blocked.

[0015] In addition, the ceramic powder discharged through the exhaust pipe can be directly sent into the mixing tank to be mixed with the adhesive (or adhesives, additives and other components). Since the ceramic powder enters the mixing tank through a high-speed airflow, it can be better dispersed in the mixing tank and better mixed with other components. Therefore, the separation device of the present invention can also better promote the efficient completion of subsequent steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a separation device for producing foam ceramics provided by an embodiment of the present invention from one perspective;

[0017] Figure 2 A schematic structural diagram of a separation device for producing foam ceramics from two perspectives provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of a separation tank portion provided by an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the structure of a separation component part provided by an embodiment of the present invention;

[0020] Figure 5 A schematic structural diagram of a perspective inside a separation component provided by an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the structure of the separation component provided by an embodiment of the present invention from two perspectives;

[0022] Figure 7A schematic diagram of the structure of an air intake pipe portion provided by an embodiment of the present invention;

[0023] Figure 8 A schematic structural diagram of the guide rod portion provided in an embodiment of the present invention.

[0024] Icons: 11-separation tank, 12-feed frame, 13-through hole, 20-separation assembly, 21-screen cylinder, 22-screen hole, 23-inlet pipe, 24-exhaust pipe, 25-scraper, 26-bump, 27-guide rod, 28-first connecting rod, 29-heating wire, 210-fixing rod, 211-bearing, 212-second connecting rod, 213-connecting pipe. DETAILED DESCRIPTION

[0025] Example

[0026] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 8As shown, the separation device for foam ceramic production of this embodiment includes a separation tank 11 with openings at both ends, and a separation assembly 20 horizontally arranged in the separation tank 11; the separation assembly 20 includes a sieve drum 21, an air inlet pipe 23 connected to one end of the sieve drum 21, an exhaust pipe 24 connected to the other end of the sieve drum 21, an air compressor connected to the air inlet pipe 23, a plurality of sieve holes 22 opened on the side wall of the sieve drum 21, a spiral scraper 25 rotatably arranged on the inner wall of the sieve drum 21, and a protrusion 26 arranged on the inner wall of the sieve drum 21; the air inlet pipe 23 and the exhaust pipe 24 are both fixedly arranged on the side wall of the separation tank 11, and a gap is provided between the scraper 25 and the inner wall of the sieve drum 21. Specifically, when in use, ceramic powder is added to the separation tank 11, and the air compressor pumps a high-speed airflow (the airflow needs to be fully filtered) into the sieve drum 21 through the air inlet pipe 23, and then discharges it from the exhaust pipe 24. According to Bernoulli's principle, the gas flow rate in the sieve drum 21 is significantly higher than that outside the sieve drum 21. Therefore, the pressure inside the sieve drum 21 is small, and the ceramic powder in the separation tank 11 passes through the sieve holes 22 and enters the sieve drum 21, and is discharged from the exhaust pipe 24 with the high-speed airflow. By setting the corresponding size of the sieve holes 22, the ceramic powder below this size can be separated from the separation tank 11. During the separation process, the high-speed airflow will also drive the spiral scraper 25 to rotate with the axis of the screen drum 21 as the center of the circle. During the rotation process, the ceramic powder stuck in the screen hole 22 can be scraped off to prevent it from clogging the screen hole 22. During the circular motion of the scraper 25, it will periodically hit the bump 26, and then cause the periodic vibration of the screen drum 21 by hitting the bump 26. The vibration of the screen drum 21 can better vibrate the ceramic powder in the separation tank 11, which can promote its rapid flow, so that the screen drum 21 can more fully contact the low-particle powder in the ceramic powder and suck it into the inside of the screen drum 21, and the vibration of the screen drum 21 can also better prevent the blockage of the screen hole 22. In addition, the ceramic powder discharged through the exhaust pipe 24 can be directly sent to the mixing tank to mix with the adhesive (or adhesive, additive and other components). Since the ceramic powder enters the mixing tank through the high-speed airflow, it can be better dispersed in the mixing tank and better mixed with other components. Therefore, the separation device of the present invention can also better promote the efficient completion of subsequent steps.

[0027] The screen drum 21 in this embodiment is provided with a horizontally arranged flow guide rod 27 inside, and the flow guide rod 27 is connected to the scraper 25 by a plurality of first connecting rods 28; the flow guide rod 27 is arranged inside the scraper 25, and a gap is arranged between the flow guide rod 27 and the scraper 25; the two ends of the flow guide rod 27 are rotatably connected to the air inlet pipe 23 and the exhaust pipe 24 respectively. Specifically, the flow guide rod 27 is arranged inside the screen drum 21, so that the space inside the screen drum 21 can be well occupied by the flow guide rod 27, so that the airflow can only pass through the space between the flow guide rod 27 and the inner wall of the screen drum 21, so that the space inside the screen drum 21 through which the airflow can flow is smaller, so that the separation requirements for ceramic powder can be met with a smaller air pressure and airflow, and a larger diameter screen drum 21 can be used, so that the contact area between the screen drum 21 and the ceramic powder is larger, and the separation efficiency of the ceramic powder is higher.

[0028] In this embodiment, both ends of the guide rod 27 are connected to a fixing rod 210, and a bearing 211 is sleeved on the outer wall of the fixing rod 210. The bearing 211 is respectively connected to the intake pipe 23 and the exhaust pipe 24 through the second connecting rod 212. Specifically, the fixing rod 210, the bearing 211 and the second connecting rod 212 can effectively support both ends of the guide rod 27, so that it can rotate more stably in the screen drum 21.

[0029] The guide rod 27 in this embodiment is a hollow and closed structure, and a horizontally arranged electric heating wire 29 is arranged inside the guide rod 27. Both ends of the electric heating wire 29 are connected to the power supply device after passing through the fixing rod 210. Specifically, the electric heating wire 29 is powered by the power supply device (needs to be connected through a brush), and after the electric heating wire 29 is heated, the heat can be transferred to the inside of the entire sieve cylinder 21 through the guide rod 27, thereby ensuring that the inside of the sieve cylinder 21 is always at a certain high temperature, which can prevent the ceramic powder from getting damp and agglomerating.

[0030] In this embodiment, both ends of the screen drum 21 are fixed with connecting pipes 213, and the air inlet pipe 23 and the exhaust pipe 24 are respectively fixedly connected to a pair of connecting pipes 213; the connecting pipes 213 are made of elastic rubber material. Specifically, since both ends of the screen tube are connected to the air inlet pipe 23 and the exhaust pipe 24 through the connecting pipes 213, the screen tube itself has a large degree of freedom, and the guide rod 27 is connected to the scraper 25 through the first connecting rod 28, and the guide rod 27 is connected to the air inlet pipe 23 and the exhaust pipe 24 through the fixing rod 210, the bearing 211, and the second connecting rod 212, and the air inlet pipe 23 and the exhaust pipe 24 are fixed on the separation tank 11, so when the scraper 25 hits the bump 26, the scraper 25 and the guide rod 27 will not generate radial vibration, so that the screen drum 21 will have the maximum radial jitter, which can better vibrate the ceramic powder in the separation tank 11.

[0031] In this embodiment, a pair of protrusions 26 are provided, and the pair of protrusions 26 are respectively provided on two opposite sides of the sieve drum 21 in the horizontal direction. The protrusions 26 are provided in the middle of the sieve drum 21 in the axial direction, and the protrusions 26 are hemispherical. Specifically, the protrusions 26 are provided on both sides of the sieve drum 21, so that the sieve drum 21 can produce reciprocating vibrations closer to the horizontal direction, and the ceramic powder in the separation tank 11 can be better vibrated, thereby improving the circulation rate of the ceramic powder in the separation tank 11 (the ceramic powder will circulate into the separation tank 11 for many times).

[0032] In the present embodiment, there are multiple separation assemblies 20, and the multiple separation assemblies 20 are all arranged horizontally, and the multiple separation assemblies 20 are arranged in an inverted triangle in the separation tank 11. The separation tank 11 has an inverted triangle structure, and a feed frame 12 is provided at the upper end of the separation tank 11. Specifically, the ceramic powder in the separation tank 11 gradually decreases in the separation assembly 20 passing through the upper layer, so the number of separation assemblies 20 in the lower layer is also correspondingly smaller, and the separation assemblies 20 distributed in an inverted triangle can have the highest contact area and separation efficiency with the ceramic powder. In addition, a through hole 13 is provided on the side wall of the separation tank 11 to accommodate the air inlet pipe and the exhaust pipe, and it is also convenient to take out the separation assembly 20 through the through hole 13, so as to facilitate the cleaning, maintenance, and replacement of the separation assembly 20 with different sieve hole 22 diameters.

[0033] In summary, the separation device for foam ceramic production of this embodiment adds ceramic powder into the separation tank 11 when in use, and the air compressor pumps the high-speed airflow into the sieve drum 21 through the air inlet pipe 23, and then discharges it from the exhaust pipe 24. According to Bernoulli's principle, the gas flow rate in the sieve drum 21 is significantly higher than that outside the sieve drum 21, so the pressure inside the sieve drum 21 is small, and the ceramic powder in the separation tank 11 passes through the sieve hole 22 and enters the sieve drum 21, and is discharged from the exhaust pipe 24 with the high-speed airflow. By setting the corresponding size of the sieve hole 22, the ceramic powder below this size can be separated from the separation tank 11. During the separation process, the high-speed airflow will also drive the spiral scraper 25 to rotate with the axis of the screen drum 21 as the center of the circle. During the rotation process, the ceramic powder stuck in the screen hole 22 can be scraped off to prevent it from clogging the screen hole 22. During the circular motion of the scraper 25, it will periodically hit the bump 26, and then cause the periodic vibration of the screen drum 21 by hitting the bump 26. The vibration of the screen drum 21 can better vibrate the ceramic powder in the separation tank 11, which can promote its rapid flow, so that the screen drum 21 can more fully contact the low-particle powder in the ceramic powder and suck it into the inside of the screen drum 21, and the vibration of the screen drum 21 can also better prevent the blockage of the screen hole 22. In addition, the ceramic powder discharged through the exhaust pipe 24 can be directly sent to the mixing tank to mix with the adhesive (or adhesive, additive and other components). Since the ceramic powder enters the mixing tank through the high-speed airflow, it can be better dispersed in the mixing tank and better mixed with other components. Therefore, the separation device of the present invention can also better promote the efficient completion of subsequent steps.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A separation device for producing foam ceramics, characterized in that: The invention comprises a separation tank (11) with openings at both ends, and a separation assembly (20) arranged horizontally in the separation tank (11); the separation assembly (20) comprises a sieve drum (21), an air inlet pipe (23) connected to one end of the sieve drum (21), an air outlet pipe (24) connected to the other end of the sieve drum (21), an air compressor connected to the air inlet pipe (23), a plurality of sieve holes (22) opened on the side wall of the sieve drum (21), a spiral scraper (25) rotatably arranged on the inner wall of the sieve drum (21), and a protrusion (26) arranged on the inner wall of the sieve drum (21); The air inlet pipe (23) and the air outlet pipe (24) are both fixedly mounted on the side wall of the separation tank (11), and a gap is provided between the scraper (25) and the inner wall of the sieve drum (21).

2. The separation device for producing foam ceramics according to claim 1, characterized in that: A horizontally arranged flow guide rod (27) is provided inside the sieve drum (21); the flow guide rod (27) and the scraper (25) are connected via a plurality of first connecting rods (28); the flow guide rod (27) is arranged inside the scraper (25); a gap is provided between the flow guide rod (27) and the scraper (25); and two ends of the flow guide rod (27) are rotatably connected to the air inlet pipe (23) and the exhaust pipe (24), respectively.

3. The separation device for producing foam ceramics according to claim 2, characterized in that: Both ends of the guide rod (27) are connected to a fixing rod (210), the outer wall of the fixing rod (210) is sleeved with a bearing (211), and the bearing (211) is respectively connected to the intake pipe (23) and the exhaust pipe (24) through a second connecting rod (212).

4. The separation device for producing foam ceramics according to claim 3, characterized in that: The guide rod (27) is a hollow and closed structure. A horizontally arranged heating wire (29) is provided inside the guide rod (27). Both ends of the heating wire (29) pass through the fixing rod (210) and are connected to the power supply device.

5. The separation device for producing foam ceramics according to claim 1, characterized in that: Connecting pipes (213) are fixedly provided at both ends of the sieve cylinder (21); the air intake pipe (23) and the exhaust pipe (24) are respectively fixedly connected to a pair of the connecting pipes (213); and the connecting pipes (213) are made of elastic rubber material.

6. The separation device for producing foam ceramics according to claim 5, characterized in that: A pair of the protrusions (26) are provided, and the pair of the protrusions (26) are respectively arranged on two opposite sides of the screen drum (21) in the horizontal direction.

7. The separation device for producing foam ceramics according to claim 6, characterized in that: The convex block (26) is arranged at the middle part of the screen drum (21) along the axial direction, and the convex block (26) is hemispherical.

8. The separation device for producing foam ceramics according to claim 1, characterized in that: A plurality of the separation components (20) are provided, and the plurality of the separation components (20) are all arranged horizontally. The plurality of the separation components (20) are arranged in an inverted triangle shape in the separation tank (11).

9. The separation device for producing foam ceramics according to claim 8, characterized in that: The separation tank (11) has an inverted triangle structure, and a feed frame (12) is provided at the upper end of the separation tank (11).

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