Vibrating screening device for aluminum oxide ceramic powder

Abstract

The utility model relates to an aluminum oxide ceramic powder vibration screening device in the field of aluminum oxide processing, which is characterized in that a buffer screen plate is suspended right below a feed port of a vibration screen body through a plurality of connecting ribs, a hollow screen support is arranged on the inner side of the joint between every two layers of food steamers, a filter screen is laid above the screen support, and a plurality of filter screens are arranged on the filter screen support. An ultrasonic transducer is mounted below the fixed base, and an ultrasonic generator is arranged on the outer side of the fixed base; a control valve is arranged on the discharging port and comprises a door plate and a valve rod, one side of the door plate is hinged to the inner wall of the food steamer through a hinge shaft, the outer side of the door plate is hinged to the valve rod through a hinge seat, the other end of the valve rod telescopically penetrates and extends out of the side wall of the discharging port through a sleeve, and a valve rod jackscrew is arranged on the outer side wall of the sleeve. The buffer screen plate is additionally arranged at the feeding hole to play a role in buffering, so that the damage risk of the screen is reduced; an ultrasonic system is additionally arranged, so that materials can be prevented from adhering to the screen, and the screening efficiency is guaranteed; a control valve is additionally arranged at the discharging port, and the screening duration and the screening precision can be controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of alumina processing, and in particular relates to a vibration screening device for alumina ceramic powder. Background Art

[0002] Alumina has a variety of crystal structures. The stability of alumina is closely related to its crystal structure. Among them, α-alumina (commonly known as corundum) has the best stability and is often used in the production of refractory materials, advanced ceramics, etc. As an excellent ceramic material, high-purity alumina ceramics have excellent electrical insulation, high thermal conductivity, high chemical resistance, high wear resistance and low thermal expansion. Its production raw materials are mainly alumina ceramic powders. During the powder processing, the alumina raw materials need to be mixed, calcined, screened, packaged and other processes. Among them, powder screening generally uses a rotary vibrating screen (also called a circular vibrating screen) to filter out impurities and lumps in the powder. Since the alumina ceramic powder itself is relatively fine and the particle size requirement for screening is relatively high, the mesh size of the screen used is required to be high. The current existing rotary vibrating screen has some problems when using a screen with a higher mesh number, such as: the existing rotary vibrating screen discharge port is open, which is not conducive to the control of screening time and screening accuracy; ceramic powder easily adheres to the screen, causing the screen holes to be blocked and thus affecting the screening efficiency; the feed port of the rotary vibrating screen is vertically connected to the upstream material hose, and the feed directly hits the screen, which will cause a short-term center accumulation phenomenon and cause a certain impact on the screen, thereby accelerating the wear and damage of the screen, shortening the service life of the screen, and increasing the replacement cost of the screen. Therefore, it is urgent to design a vibration screening device that can better suit alumina ceramic powder. Utility Model Content

[0003] In view of the above situation, the utility model provides an alumina ceramic powder vibration screening device, which can well solve the technical problems existing in the existing rotary vibrating screening device.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A vibrating screening device for alumina ceramic powder comprises a vibrating screen body formed by coaxially stacking multiple layers of circular cages, and a fixed base connected and supported below the vibrating screen body, wherein a plurality of vibration isolation springs are mounted above the fixed base below the bottom edge of the vibrating screen body, a vibrating motor is installed below the middle of the bottom of the vibrating screen body, a feed port is provided in the middle of the top cover of the top layer of cages, a discharge port is provided on one side of the bottom of each layer of cages, a buffer mesh plate with a porous mesh structure is suspended directly below the feed port; a screen support with a hollow frame structure is provided on the inner side of the connection between the middle layers of cages, and filter screens of different mesh sizes are laid above each layer of screen support, the mesh size of the filter screens increases successively from top to bottom, and the screen holes become finer step by step, and an ultrasonic transducer is installed below each layer of screen support; each of the discharge ports is matched with an openable and closable control valve at one end close to the inner wall of the cage.

[0006] Furthermore, the buffer mesh is a circular, porous stainless steel plate, securely connected to the inner wall of the top cover of the top cage via multiple, spaced-apart connecting ribs along its circumference. This porous buffer mesh cushions and disperses material falling from the feed inlet, preventing it from directly impacting the mesh within the top cage, thereby protecting the mesh and reducing the risk of damage, thereby increasing its service life.

[0007] Furthermore, an ultrasonic generator is disposed on the outside of the fixed base, and each of the ultrasonic transducers is connected to the ultrasonic generator via a wire. The addition of an ultrasonic high-frequency oscillation system to the screen effectively prevents the fine alumina ceramic powder from adsorbing the filter screen, while also helping to disperse the material on the filter screen, thereby improving screening and filtration efficiency.

[0008] Furthermore, the control valve is a side-opening door structure, including a door panel and a valve stem. The door panel is a stainless steel curved plate that matches the inner wall of the cage. One side edge of the door panel is rotatably hinged to the inner wall of the cage through a hinge shaft. The outer surface of the door panel is rotatably hinged to one end of the valve stem through a hinge seat. The other end of the valve stem is telescopically extended from the side wall of the discharge port through a sleeve.

[0009] Furthermore, the end of the sleeve near the discharge port is fixedly connected to the side wall of the discharge port, and an adjustment screw for locking the valve stem position is threaded through the outer wall of the sleeve. By pushing and pulling to adjust the extension of the valve stem, the opening and closing degree between the door panel and the discharge port can be controlled, thereby achieving control over the screening discharge speed, screening duration, and screening accuracy, ensuring the screening effect and quality of the alumina ceramic powder material.

[0010] Preferably, a handle ball is coaxially screwed to the end of the valve stem away from the door panel to facilitate the gripping operation when manually pushing and pulling the valve stem for adjustment.

[0011] Preferably, each cage is made of stainless steel, and the inner wall of each cage, the inner surface of the door panel, and the upper surface of the buffer mesh are sprayed with a layer of polyurethane lining. Existing vibrating screen cages are mostly made of stainless steel. However, due to the relatively high purity requirements of alumina ceramic powder, the screening process should minimize friction between the material and the inner wall of the stainless steel equipment to prevent small amounts of stainless steel chips generated by friction from mixing into the powder material and affecting the purity quality of the alumina ceramic powder. The polyurethane lining primarily serves as an isolation layer, and polyurethane has higher wear resistance and will not adversely affect the quality of the alumina ceramic powder.

[0012] The present invention also includes other components that enable it to be used normally, which are all conventional means in the field. In addition, devices or components not limited in the present invention, such as: vibration motor, vibration isolation spring, fixed base, filter screen, ultrasonic transducer and ultrasonic generator, etc., all adopt the existing technology in the field.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model provides a vibration screening device for alumina ceramic powder, which adds a buffer mesh plate at the feed port of the rotary vibrating screen, which has a good buffering and breaking up effect on the feed, and avoids the feed directly hitting the screen to cause the material to temporarily accumulate and disperse slowly, and at the same time helps to protect the screen, reduce the risk of damage, and increase the service life of the screen; and by adding an ultrasonic high-frequency oscillation device under the screen, on the one hand, it is more conducive to the rapid and uniform dispersion of the material above the screen, and on the other hand, the screen is equipped with a self-cleaning function to avoid the material from adhering to the screen and clogging the screen holes, thereby ensuring the screening efficiency; in addition, a control valve is also installed on the discharge port of the rotary vibrating screen, which can control the discharge speed of the material and thereby achieve effective control of the screening time and screening accuracy. A polyurethane inner layer is also sprayed on the inner wall of the vibration screen body to play an isolation and protection role, which avoids a small amount of stainless steel chips generated by friction from mixing into the material and affecting the purity of the alumina ceramic powder, and is conducive to ensuring the screening effect and product quality of the alumina ceramic powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the alumina ceramic powder vibration screening device in the embodiment.

[0016] Figure 2 for Figure 1 Structural view of the buffer screen along direction A.

[0017] Figure 3 for Figure 1 Structural view of the filter screen and ultrasonic transducer along the B direction.

[0018] Figure 4for Figure 1 Structural view of the control valve along the C direction. DETAILED DESCRIPTION

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0020] Example

[0021] like Figure 1 As shown, a vibrating screening device for alumina ceramic powder includes a vibrating screen body 1 formed by coaxially stacking two layers of circular cages, and a fixed base 2 connected and supported below the vibrating screen body.

[0022] The bottom edge of the vibrating screen body is mounted above the fixed base through multiple vibration isolation springs 3. A vibration motor 4 is installed in the lower middle of the bottom of the vibrating screen body. A feed port 5 is provided in the middle of the top cover of the top cage, and a discharge port 6 is provided on one side of the bottom of each cage.

[0023] like Figure 2 As shown, a buffer mesh plate 7 with a porous mesh structure is suspended just below the feed port. The buffer mesh plate is a circular porous mesh plate made of stainless steel porous plate, and its peripheral edge is fixedly connected to the inner wall of the top cover of the top cage through a plurality of connecting ribs 8 distributed at intervals.

[0024] The porous buffer mesh can buffer and break up the material falling from the feed port, preventing the material from directly hitting the screen in the top cage.

[0025] like Figure 3 As shown, a screen bracket 9 with a hollow frame structure is provided on the inner side of the connection between the two layers of cages, a filter screen 10 is laid on the top of the screen bracket, and an ultrasonic transducer 11 is installed below the screen bracket.

[0026] An ultrasonic generator 12 is provided on the outer side of the fixed base, and the ultrasonic transducer is connected to the ultrasonic generator via a wire.

[0027] Adding an ultrasonic high-frequency oscillation system to the screen can effectively prevent the adsorption of fine alumina ceramic powder materials on the filter screen, and also help the materials to begin to disperse on the filter screen.

[0028] like Figure 4As shown, the discharge ports of both layers of cages are equipped with side-opening control valves that can be opened and closed. The control valves include a door panel 13 and a valve stem 14. The door panel is a curved stainless steel plate that matches the inner wall of the cage. One side edge of the door panel is rotatably hinged to the inner wall of the cage via a hinge shaft, and the outer surface of the door panel is rotatably hinged to one end of the valve stem via a hinge seat.

[0029] The other end of the valve stem is telescopically extended from the side wall of the discharge port through a sleeve 15, and the sleeve is fixedly connected to the side wall of the discharge port. The outer wall thread of the sleeve is also threaded with an adjusting screw 16 for locking the valve stem position. The outer end of the adjusting screw is fixedly connected to a knurled handwheel 17, which is convenient for hand-tightening the adjusting screw. The other end of the valve stem is also coaxially threaded with a handle ball 18, which is convenient for pushing and pulling the telescopic valve stem.

[0030] By pushing and pulling to adjust the extension length of the valve stem, the opening and closing degree between the door panel and the discharge port can be controlled, thereby achieving control over the screening discharge speed, screening time and screening accuracy.

[0031] Each of the cages is made of stainless steel, and the inner wall of each cage, the inner surface of the door panel, and the upper surface of the buffer mesh are sprayed with a layer of polyurethane lining 19.

[0032] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the scope of protection of the present invention.

Claims

1. A vibrating screening device for alumina ceramic powder, comprising a vibrating screen body formed by coaxially stacking multiple layers of circular cages, and a fixed base connected and supported below the vibrating screen body. Multiple vibration isolation springs are mounted above the fixed base below the bottom edge of the vibrating screen body. A vibrating motor is mounted below the center of the bottom of the vibrating screen body. A feed port is provided in the center of the top cover of the cage on the top layer, and a discharge port is provided on one side of the bottom of each cage layer. The device is characterized in that: A buffer mesh plate with a porous mesh structure is suspended directly below the feed port; screen supports with a hollow frame structure are provided on the inner side of the connection between the middle layers of cages, and filter screens of different mesh sizes are laid on the top of each layer of screen supports, and an ultrasonic transducer is installed under each layer of screen supports; each discharge port is matched with an openable and closable control valve at one end close to the inner wall of the cage.

2. The alumina ceramic powder vibration screening device according to claim 1, characterized in that: The buffer mesh plate is a circular porous mesh plate made of stainless steel porous plate, and its peripheral edge is fixedly connected to the inner wall of the top cover of the cage on the top layer through a plurality of spaced connecting ribs.

3. The alumina ceramic powder vibration screening device according to claim 2, characterized in that: An ultrasonic generator is arranged on the outer side of the fixed base, and each of the ultrasonic transducers is connected to the ultrasonic generator via a wire.

4. The alumina ceramic powder vibration screening device according to claim 3, characterized in that: The control valve is a side-opening door structure, including a door plate and a valve stem. The door plate is a stainless steel curved plate that matches the inner wall of the cage. One side edge of the door plate is rotatably hinged to the inner wall of the cage through a hinge shaft. The outer surface of the door plate is rotatably hinged to one end of the valve stem through a hinge seat. The other end of the valve stem is telescopically extended from the side wall of the discharge port through a sleeve.

5. The alumina ceramic powder vibration screening device according to claim 4, characterized in that: One end of the sleeve close to the discharge port is fixedly connected to the side wall of the discharge port, and an adjusting top screw for locking the valve stem position is threaded through the outer wall of the sleeve.

6. The alumina ceramic powder vibration screening device according to claim 5, characterized in that: One end of the valve stem away from the door plate is coaxially screwed with a handle ball.

7. The alumina ceramic powder vibration screening device according to claim 6, characterized in that: Each of the cages is made of stainless steel, and the inner wall of each cage, the inner surface of the door panel and the upper surface of the buffer mesh are sprayed with a layer of polyurethane lining.

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