Ultrafine powder blanking device

Abstract

The utility model relates to the technical field of ultrafine powder, and discloses an ultrafine powder blanking device which comprises a stock bin and a top cover, a support is fixedly connected to the inner side of the stock bin, a movable sieve plate is rotatably connected to the outer wall of the support, springs are fixedly connected to the front side and the rear side of the movable sieve plate, and the top cover is fixedly connected to the top cover. And the ends, away from each other, of the two springs are fixedly connected to the inner side of the stock bin, a hammer head is installed at the top of the movable screening plate, electromagnets are fixedly connected to the left side and the right side of the outer wall of the stock bin, a star-shaped discharging valve is installed at the bottom of the stock bin, and an air pressure control mechanism is arranged on the left side of the stock bin. According to the utility model, the hammer head above the movable sieve plate is driven by the electromagnet to impact the stock bin, vibration is generated, the repose angle of materials is instantly damaged, the circulating period is formed by the repeated power-on and power-off, and the stirring effect can be achieved in the moving process of the movable sieve plate, so that the superfine powder is not easy to form a bridging phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of ultrafine powder technology, and in particular to an ultrafine powder feeding device. Background Technology

[0002] In modern industrial production, ultrafine powder materials are widely used in the electronics, chemical, pharmaceutical and food industries due to their unique physicochemical properties. As various industries continue to pursue more refined and high-performance products, the demand for ultrafine powders is also increasing. This has prompted continuous innovation in related production processes. In the powder processing and application process, the feeding device is a key link, and its performance directly affects production efficiency, product quality and cost control.

[0003] Powder processing equipment generates ultrafine powder during production. This ultrafine powder is collected by a dust collector and then packaged using a star-shaped feeder. Due to the extremely low bulk density of ultrafine powder, it forms an angle of repose, causing the material to bridge and preventing it from being discharged. This necessitates equipment shutdown for maintenance. Currently, air hammers are used to address the angle of repose caused by ultrafine powder, but this method only provides supplementary relief. When there is a large amount of material, an angle of repose will still form. Therefore, an ultrafine powder feeding device is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an ultrafine powder feeding device, which aims to improve the existing technology of using air hammer to solve the angle of repose formed by ultrafine powder. However, the air hammer method only has an auxiliary role, and the problem of angle of repose will still be formed when there is a large amount of material.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an ultrafine powder feeding device, comprising a hopper and a top cover, wherein a support is fixedly connected to the inner side of the hopper, a movable sieve plate is rotatably connected to the outer wall of the support, springs are fixedly connected to the front and rear sides of the movable sieve plate, and the ends of two springs that are far apart are fixedly connected to the inner side of the hopper, a hammer is installed on the top of the movable sieve plate, electromagnets are fixedly connected to the left and right sides of the outer wall of the hopper, a star-shaped discharge valve is installed at the bottom of the hopper, and a pneumatic control mechanism is provided on the left side of the hopper. The pneumatic control mechanism is used to balance the pneumatic pressure inside the hopper with the external pressure, effectively protecting the safety of the hopper.

[0006] As a further description of the above technical solution:

[0007] The air pressure control mechanism includes a feed pipe connected to the left side of the top cover. The left end of the feed pipe is connected to a second installation pipe, the left end of the second installation pipe is connected to a first installation pipe, the left end of the first installation pipe is connected to a ventilation pipe, the left side of the ventilation pipe is connected to a fan, and a pressure relief valve is installed on the rear side of the top cover.

[0008] As a further description of the above technical solution:

[0009] The air pressure control mechanism also includes a fixing frame, which is fixedly connected to the bottom of the fan.

[0010] As a further description of the above technical solution:

[0011] The movable sieve plate adopts a trapezoidal design with sieve bars in the middle.

[0012] As a further description of the above technical solution:

[0013] The spacing between the intermediate screen bars of the movable screen plate is 1 to 500 mm, the thickness of the movable screen plate is 10 mm to 30 mm, and the material of the movable screen plate is a wear-resistant metal material.

[0014] As a further description of the above technical solution:

[0015] The spring is located in the upper part of the movable sieve plate, and is evenly and symmetrically distributed on both sides of the movable sieve plate. The spring force is less than the electromagnet force.

[0016] As a further description of the above technical solution:

[0017] The electromagnet is electrically connected via a time relay.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the silo is fixedly connected to fasteners on all four sides, and the bottom of each of the fasteners is fixedly connected to a support frame.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, after the ultrafine powder enters the hopper, the electromagnet is energized, causing the movable screen plate to rotate and drive the hammer above to strike the hopper, generating vibration and instantly disrupting the angle of repose of the material. When the movable screen plate contacts the hopper, the electromagnet is de-energized and loses its magnetic force. Under the action of the spring force, the movable screen plate returns to the center position. Then, the electromagnet on the other side of the hopper is energized to achieve the same effect. After that, the power is de-energized. The energizing and de-energizing cycle is repeated to form a cycle. During the movement of the movable screen plate, it can play a stirring role, making it less likely for the ultrafine powder to form a bridging phenomenon.

[0022] 2. In this utility model, the feed pipe, installation pipe II, ventilation pipe and installation pipe I form a conveying channel, which allows the material to enter the silo accurately. The pressure relief valve monitors the pressure in the pipeline and inside the silo in real time. When the silo's air intake and exhaust pressure exceeds the normal pressure or there are abnormal temperature changes, it protects the silo from the influence of excessive positive and negative pressure, regulates the positive and negative pressure inside the silo, and balances the air pressure inside the silo with the outside, effectively protecting the safety of the silo. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an ultrafine powder feeding device proposed in this utility model;

[0024] Figure 2 This is a cross-sectional view of the refractory wall of the waste heat utilization device of the ultrafine powder feeding device proposed in this utility model.

[0025] Figure 3 This is a schematic diagram of the pneumatic control mechanism of an ultrafine powder feeding device proposed in this utility model;

[0026] Figure 4 This is a circuit diagram of an ultrafine powder feeding device proposed in this utility model.

[0027] Legend:

[0028] 1. Movable screen plate; 2. Spring; 3. Support; 4. Electromagnet; 5. Hammer; 6. Hopper; 7. Rotary rotary valve; 8. Pneumatic control mechanism; 801. Fan; 802. Ventilation pipe; 803. Installation pipe one; 804. Installation pipe two; 805. Feed pipe; 806. Pressure relief valve; 807. Fixing frame; 9. Top cover; 10. Pipeline; 11. Fixture; 12. Support frame. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of an ultrafine powder feeding device, comprising a hopper 6 and a top cover 9. A support 3 is fixedly connected to the inner side of the hopper 6, and a movable screen plate 1 is rotatably connected to the outer wall of the support 3. The support 3 is located inside the hopper 6 and acts on the lower edge of the movable screen plate 1 to support it. Springs 2 are fixedly connected to both the front and rear sides of the movable screen plate 1, with the ends of the two springs 2 being fixedly connected to the inner side of the hopper 6. The movable screen plate 1 is located inside the hopper 6, and the springs 2 are located on both sides of the movable screen plate 1 to ensure that the movable screen plate 1 remains perpendicular to the top surface of the hopper 6. A hammer 5 is installed on the top of the movable screen plate 1. Electromagnets 4 are fixedly connected to both the left and right sides of the outer wall of the hopper 6. The electromagnets 4 are located on the outer shell of the hopper 6 and are flush with the movable screen plate 1. In the direction of movement, a pair of electromagnets 4 are installed on each side of the hopper 6. When the electromagnets 4 are energized, the movable screen plate 1 can move left and right. The hammer head 5 can strike the shell of the hopper 6. A star-shaped discharge valve 7 is installed at the bottom of the hopper 6. A pneumatic control mechanism 8 is set on the left side of the hopper 6. The pneumatic control mechanism 8 is used to balance the air pressure inside the hopper 6 with the outside air, effectively protecting the safety of the hopper 6. The movable screen plate 1 adopts a trapezoidal design with screen bars in the middle. The spacing between the screen bars in the middle of the movable screen plate 1 is 1 to 500 mm. The thickness of the movable screen plate 1 is 10 mm to 30 mm. The material of the movable screen plate 1 is made of wear-resistant metal material. The spring 2 is located in the upper middle part of the movable screen plate 1. The movable screen plate 1 is evenly and symmetrically distributed on both sides. The elastic force of the spring 2 is less than the magnetic force of the electromagnet 4. The electromagnet 4 is electrically connected through a time relay.

[0031] Specifically, the hopper 6 and top cover 9 are composed of a support 3 fixedly installed on the inner side of the hopper 6. A movable screen plate 1 rotates on the outer wall of the support 3, ensuring that the movable screen plate 1 can rotate freely inside the hopper 6 and also supporting the movable screen plate 1. The far ends of the two springs 2 are fixed to the inner side of the hopper 6, ensuring that the movable screen plate 1 remains perpendicular to the top surface of the hopper 6. A hammer head 5 is installed on the top of the movable screen plate 1 to strike the shell of the hopper 6 for better material discharge. A pair of electromagnets 4 are installed on each side of the hopper 6, arranged parallel to the movable screen plate 1. When the electromagnets 4 are energized, the movable screen plate 1 can move left and right inside the hopper 6, thereby achieving precise control of the ultrafine powder. A star-shaped discharge valve 7 is installed at the bottom of the hopper 6 for control. The flow of ultrafine powder; the movable sieve plate 1 adopts a trapezoidal design with sieve bars in the middle, and the sieve bars are spaced 1 to 500 mm apart, which can meet the screening requirements of ultrafine powders of different particle sizes. The thickness of the movable sieve plate 1 is designed to be 10 mm to 30 mm to ensure its structural stability and durability. In terms of material selection, the movable sieve plate 1 is made of wear-resistant metal material to resist the wear of ultrafine powder. The spring 2 is located in the upper middle part of the movable sieve plate 1, and the two sides of the movable sieve plate 1 are evenly and symmetrically distributed to ensure the balance and reliability of the device. The elastic force of the spring 2 is less than the magnetic force of the electromagnet 4, so as to ensure that the movable sieve plate 1 can move flexibly under the action of the electromagnet 4. The electromagnet 4 is electrically connected through a time relay, thereby realizing precise control of the energizing time of the electromagnet 4, further improving the automation level and operation convenience of the device.

[0032] Reference Figure 1 and Figure 3 The air pressure control mechanism 8 includes a feed pipe 805, which is connected to the left side of the top cover 9. The left end of the feed pipe 805 is connected to the second installation pipe 804, and the left end of the second installation pipe 804 is connected to the first installation pipe 803. The feed pipe 805, the second installation pipe 804, and the first installation pipe 803 form a conveying channel to allow materials to enter the silo 6 accurately. The left end of the first installation pipe 803 is connected to the ventilation pipe 802, and the left side of the ventilation pipe 802 is connected to the fan 801. A pressure relief valve 806 is installed on the rear side of the top cover 9. The air pressure control mechanism 8 also includes a fixing frame 807. The pressure relief valve 806 can monitor the pressure inside the pipeline 10 and the silo 6 in real time to avoid excessive internal pressure and to prevent abnormal material flow or dust caused by air pressure fluctuations. The fixing frame 807 is fixedly connected to the bottom of the fan 801.

[0033] Specifically, the feed pipe 805, the second installation pipe 804, and the first installation pipe 803 together form a conveying channel to ensure that the material can be accurately conveyed into the silo 6. In order to further ensure the smooth flow of the material, the left end of the first installation pipe 803 is also connected to a ventilation pipe 802 to maintain stable air pressure. A pressure relief valve 806 is installed on the rear side of the top cover 9. This pressure relief valve 806 can monitor and adjust the pressure inside the entire pipeline 10 and the silo 6 in real time. Its existence is to avoid excessive internal pressure, thereby preventing abnormal material flow or dust caused by air pressure fluctuations, and ensuring the safety and stability of the entire system.

[0034] Reference Figure 1 and Figure 2 The outer walls of the hopper 6 are all fixedly connected with fasteners 11, and the bottom of each fastener 11 is fixedly connected with a support frame 12.

[0035] Specifically, the outer walls of the silo 6 are fixed by fasteners 11. These fasteners 11 not only ensure the stability of the silo structure, but also connect the bottom to the support frame 12. The presence of the support frame 12 further enhances the load-bearing capacity and stability of the entire structure, ensuring the safety and reliability of the silo 6 under various working conditions.

[0036] Working principle: During powder production, the blower 801 is turned on to collect ultrafine powder. Then, the star-shaped discharge valve 7 is opened to allow the material to enter the packaging bag. After the ultrafine powder enters the hopper 6, due to the slope of the hopper 6, an angle of repose is generated. After discharge, the electromagnet 4 on one side of the hopper 6 is energized to generate magnetic force. Due to the magnetic force of the electromagnet 4, the movable screen plate 1 is quickly attracted to the shell on one side of the hopper 6. At the instant the movable screen plate 1 contacts the side of the hopper 6, the hammer 5 above the movable screen plate 1 will... The impact on the housing of hopper 6 generates vibration, which instantly disrupts the angle of repose of the material. When the movable screen plate 1 comes into contact with the housing of hopper 6, the electromagnet 4 is de-energized and loses its magnetic force. Under the action of the spring force of spring 2, the movable screen plate 1 returns to the center position. Then, the electromagnet 4 on the other side of hopper 6 is energized to achieve the same effect. After that, the power is de-energized. The cycle of energizing and de-energizing is repeated to form a cycle. During the movement of the movable screen plate 1, it can play a stirring role, making it less likely for the ultrafine powder to form a bridging phenomenon.

[0037] Furthermore, the feed pipe 805, the second installation pipe 804, and the first installation pipe 803 form a conveying channel, allowing materials to accurately enter the silo 6. A pressure relief valve 806 is installed on the rear side of the top cover 9. The pressure relief valve 806 can monitor the pressure inside the pipe 10 and the silo 6 in real time. When the silo 6 experiences excessive pressure during air intake or exhaust and abnormal temperature changes, it protects the silo 6 from excessive positive and negative pressure, regulates the positive and negative pressure inside the silo 6, and balances the air pressure inside the silo 6 with the external pressure, effectively protecting the safety of the silo 6.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrafine powder feeding device, comprising a hopper (6) and a top cover (9), characterized in that: A bracket (3) is fixedly connected to the inner side of the silo (6). A movable screen plate (1) is rotatably connected to the outer wall of the bracket (3). Springs (2) are fixedly connected to the front and rear sides of the movable screen plate (1). The two springs (2) are fixedly connected to the inner side of the silo (6) at opposite ends. A hammer (5) is installed on the top of the movable screen plate (1). Electromagnets (4) are fixedly connected to the left and right sides of the outer wall of the silo (6). A star-shaped discharge valve (7) is installed at the bottom of the silo (6). A pneumatic control mechanism (8) is provided on the left side of the silo (6). The pneumatic control mechanism (8) is used to balance the pneumatic pressure inside the silo (6) with the outside, effectively protecting the safety of the silo (6).

2. The ultrafine powder feeding device according to claim 1, characterized in that: The air pressure control mechanism (8) includes a feed pipe (805), which is connected to the left side of the top cover (9). The left end of the feed pipe (805) is connected to an installation pipe two (804), the left end of the installation pipe two (804) is connected to an installation pipe one (803), the left end of the installation pipe one (803) is connected to a ventilation pipe (802), the left side of the ventilation pipe (802) is connected to a fan (801), and a pressure relief valve (806) is installed on the rear side of the top cover (9).

3. The ultrafine powder feeding device according to claim 2, characterized in that: The air pressure control mechanism (8) also includes a fixing frame (807), which is fixedly connected to the bottom of the fan (801).

4. The ultrafine powder feeding device according to claim 1, characterized in that: The movable sieve plate (1) adopts a trapezoidal design with sieve bars in the middle.

5. The ultrafine powder feeding device according to claim 1, characterized in that: The spacing between the intermediate screen bars of the movable screen plate (1) is 1 to 500 mm, the thickness of the movable screen plate (1) is 10 mm to 30 mm, and the material of the movable screen plate (1) is a wear-resistant metal material.

6. The ultrafine powder feeding device according to claim 1, characterized in that: The spring (2) is located in the upper part of the movable sieve plate (1), and is evenly and symmetrically distributed on both sides of the movable sieve plate (1). The elastic force of the spring (2) is less than the magnetic force of the electromagnet (4).

7. The ultrafine powder feeding device according to claim 1, characterized in that: The electromagnet (4) is electrically connected via a time relay.

8. The ultrafine powder feeding device according to claim 1, characterized in that: The outer wall of the hopper (6) is fixedly connected with fasteners (11) around its perimeter, and the bottom of each of the fasteners (11) is fixedly connected with a support frame (12).

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