Integrated powder selecting equipment

Abstract

The invention relates to integrated powder selecting equipment which comprises a box body, an upper air blowing plate, a vibrating screen and a lower air blowing plate, the box body is hollow, the upper air blowing plate and the lower air blowing plate are installed in the box body at intervals from top to bottom, the vibrating screen is installed between the upper air blowing plate and the lower air blowing plate, a feeding port of the vibrating screen is communicated with a discharging port of the upper air blowing plate, and a discharging port of the lower air blowing plate is communicated with a discharging port of the lower air blowing plate. A discharging port of the vibrating screen is located above the lower air blowing plate, a feeding hole and a powder discharging hole are further formed in the box body, and the pressure of air blown out by the upper air blowing plate is smaller than that of air blown out by the lower air blowing plate. By means of the design of the multiple air blowing plates in the box body, layered powder selection is achieved, the vibrating screen is integrated between the upper air blowing plate and the lower air blowing plate and used for removing peculiar smells in powder and assisting powder selection, and the powder selection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder selection equipment, in particular to integrated powder selection equipment. Background Art

[0002] Powder selection equipment is a mechanical device used for powder selection. It is usually used to screen, separate and grade powder materials during powder processing to obtain powder products with different particle size distributions. According to different classification standards, powder selection equipment can be divided into different types. Common powder selection equipment includes: According to the principle of powder selection, it can be divided into centrifugal, gravity, wind, vibration and other types. According to the purpose, it can be divided into coal powder selection machine, calcium powder selection machine, cement powder selection machine, glass powder selection machine, etc. According to the structural form, it can be divided into vertical, horizontal, inclined, combined and other types. In order to improve the powder selection accuracy, the applicant has previously applied for and authorized a patent number of 202420128054.5, a new type of powder selection equipment, which innovatively designs a blast plate, and can adjust the wind pressure and wind speed of the blast plate to make the quicksand-like material flow on the blast plate. During the material flow, the dust with small particle size (0.035-0.075mm) is blown up to complete the powder selection, and the dust is selected over a large area in a sealed space, ensuring the accuracy and quality of the powder selection. However, we found in the actual production process that although the powder selection accuracy of the single blast plate is very high, the powder selection efficiency is still low. Therefore, we made improvements on this basis in order to achieve more efficient powder selection. Summary of the invention

[0003] Based on this, it is necessary to provide an integrated powder selection equipment to address the above problems.

[0004] The integrated powder selection equipment comprises a box body, an upper blast plate, a vibrating screen and a lower blast plate, wherein the box body is hollow, and the upper blast plate and the lower blast plate are installed in the box body at intervals from top to bottom, and the vibrating screen is installed between the upper blast plate and the lower blast plate, and the feed inlet of the vibrating screen is connected with the discharge port of the upper blast plate, and the discharge port of the vibrating screen is located above the lower blast plate. A feed hole and a powder discharge hole are also provided on the box body, and the wind pressure blown out by the upper blast plate is less than the wind pressure blown out by the lower blast plate.

[0005] Preferably, heating wires are provided in the upper blast plate and the lower blast plate.

[0006] Preferably, the heating wire is heated by electromagnetic induction.

[0007] Preferably, a discharge hole is provided at the bottom of the box body.

[0008] Preferably, the upper blast plate and the lower blast plate divide the box body to form a first powder outlet area and a second powder outlet area, and the two powder outlet holes are respectively connected to the first powder outlet area and the second powder outlet area.

[0009] Preferably, a volute fan is installed at the outlet end of the powder outlet.

[0010] Preferably, guide plates are provided on the plate surfaces of the upper air blast plate and the lower air blast plate.

[0011] Preferably, the blowing directions of the upper blowing plate and the lower blowing plate are adjustable.

[0012] Preferably, the number of the upper blowing plates is one or more.

[0013] Preferably, the vibrating screen is arranged at an angle, and a deposition box is arranged at the lower end of the vibrating screen. The deposition box has a spiral stirring roller, and both ends of the spiral stirring roller are movable through the deposition box, and both ends of the spiral stirring roller are connected to the side wall of the box through a bearing seat.

[0014] The invention is beneficial in that: a double blast plate design is provided in the box body, and a vibrating screen is integrated between the upper blast plate and the lower blast plate to remove odor in the powder and assist in powder selection, thereby greatly improving the powder selection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an integrated powder selection device according to one embodiment;

[0016] Figure 2 Schematic diagram of the top view of the upper blast plate;

[0017] Figure 3 is a top view schematic diagram of another embodiment of an upper blast plate;

[0018] Figure 4 It is a top view schematic diagram of another embodiment of the upper blast plate. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figure 1As shown, the integrated powder selection equipment includes a box body 1, an upper blast plate 2, a vibrating screen 3 and a lower blast plate 4. The box body 1 is hollow. The upper blast plate 2 and the lower blast plate 3 are installed in the box body 1 from top to bottom. The vibrating screen 3 is installed between the upper blast plate 2 and the lower blast plate 4. The feed port of the vibrating screen 3 is connected with the discharge port of the upper blast plate 2. The discharge port of the vibrating screen 3 is located above the lower blast plate 4. The box body 1 is also provided with a feed hole 11 and a powder discharge hole 12. The wind pressure blown out by the upper blast plate 2 is less than the wind pressure blown out by the lower blast plate 4. Specifically, the box body 1 is made of metal or plastic, and is mainly used to form a closed powder selection environment to avoid dust spillage and pollution of the surrounding environment. The box body 1 made of metal has a strong structure and a long service life. Specifically, stainless steel can be used for outdoor use and has strong anti-corrosion ability. The shape of the box body 1 can be square, cylindrical or other shapes, which are not specifically limited here. The upper blast plate 2 and the lower blast plate 4 can be designed to be square plates, circular plates or other shapes according to the cross-section of the box body 1. The structure of the upper blast plate 2 and the lower blast plate 4 is consistent with the structure in the application number 202420128054.5. They are both hollow plates. Several hoods can be detachably installed on the plate surface for air outlet. The upper blast plate 2 and the lower blast plate 4 are both connected to the external blast equipment. The gas blows out from the hood. Because the hood blows out high-pressure airflow, the quicksand-like powder is spread on the plate surface of the upper blast plate 2, rolling and surging. Dust with smaller particle size can be blown up and float in the box body 1, waiting to be extracted to complete the powder selection. By adjusting the power of the blast equipment, the wind pressure and wind speed of the hood outlet can be adjusted, and then the dust that meets the particle size range required by the user can be screened out. Specifically in this design, we mainly select powders with a particle size of 0.035 to 0.075 mm. Particles with larger particle sizes will be deposited on the upper blast plate 2 because of their heavy weight, while smaller dust particles in the powder will be blown up, float in the air, and be extracted to complete a powder selection. When a large amount of powder that has been screened once is deposited on the upper blast plate 2, under the action of gravity, it can flow downstream from the outlet of the upper blast plate 2 like quicksand and enter the vibrating screen 3. In this embodiment, we use a high-frequency vibrating screen with a specific vibration frequency of more than 3000 Hz. Use the vibrating screen 3 to break up the compacted powder and loosen it, improve the powder selection efficiency, and ensure the stability of the output dust particle size and the consistency of product quality. Finally, the output powder falls on the lower blast plate 4 at the bottom, and is again selected by air separation. The principle is the same as that of the upper blast plate 2, so it will not be repeated here. It should be noted that when dust (0.035-0.075 mm) floats in the box 1, the user can use a pipe to connect the box to extract the dust (0.035-0.075 mm), while powder with larger particle size will be deposited at the bottom of the box 1 and discharged through the pipe.The design of upper and lower double plates plus a vibrating screen 3 greatly improves the powder selection efficiency, and can also prevent the powder from being compacted through the vibrating screen, which makes it impossible to select the powder by blowing. Furthermore, we use an upper blast plate 2 and a lower blast plate 4, with an upper and lower spacing design, and the vibrating screen 3 installed in the middle will not block the air flow. When we set the wind pressure of the lower blast plate 4 to be greater than the wind pressure of the upper blast plate 2, the air pressure in the box 1 decreases from the lower blast plate 4 upward, that is, the gas flow direction in the box 1 is from bottom to top. When selecting powder by blowing, because the wind pressure of the upper blast plate 2 is small, the dust particle size that can be selected will be smaller, ranging from 0.035 to 0.055 mm, and the wind pressure between the upper blast plate 2 and the lower blast plate 4 is greater than the wind pressure above the upper blast plate 2, so the dust particle size that can be selected will be between 0.04 and 0.075 mm. This design can realize powder selection in layers and areas, and can more fully air-select the dust carried in the powder. Only one powder selection is required to select more than 80% of the dust carried in the powder with the particle size required by customers, which greatly improves the powder selection efficiency and reduces energy consumption costs.

[0023] Specifically, heating wires are provided inside the upper blast plate 2 and the lower blast plate 3. Because some incoming powder materials may not be dry enough, the inside is relatively moist, the powder particles are small, and moisture causes compaction, we perform air separation by blowing out hot air, which can dry the moist powder.

[0024] Specifically, the heating wire is heated by electromagnetic induction, and the electromagnetic induction heating is arranged in the air duct inside the upper blast plate 2 and the lower blast plate 3. The specific principle is that when the current passes through the electromagnetic coil, an alternating magnetic field will be generated around it. This magnetic field will penetrate the metal air duct, causing eddy currents in the air duct. When the eddy current flows in the metal, it will generate heat due to resistance, thereby heating the fluid in the air duct. When the electromagnetic induction heats the air duct, a temperature sensor can be equipped to monitor the fluid temperature in real time. By controlling the size and frequency of the current, the heating power can be adjusted to ensure the heating effect and energy efficiency. When the fluid temperature reaches the set value, the heating power will automatically reduce or stop heating to prevent overheating and energy waste. Compared with the traditional resistance wire heating method, the electromagnetic induction heating has a high thermal energy conversion efficiency, a heat utilization rate of more than 95%, and a significant energy-saving effect. In other embodiments, resistance wires and other methods can also be used to heat the airflow, as long as the airflow can be heated.

[0025] like Figure 1 As shown, a discharge hole 13 is provided at the bottom of the box 1 to prevent the remaining powder from accumulating in the box 1 after powder selection. The remaining powder can be sent to the crusher, crushed into smaller particles, and then sent to the box 1 again for powder selection, and so on, thereby reducing the powder cost of powder selection.

[0026] like Figure 1 As shown, the upper blast plate 2 and the lower blast plate 3 divide the box body 1 to form a first powder outlet area 100 and a second powder outlet area 200, and the two powder outlet holes 12 are respectively connected to the first powder outlet area 100 and the second powder outlet area 200. Specifically, the first powder outlet area 100 and the second powder outlet area 200 formed by the upper blast plate 2 and the lower blast plate 3 allow dust to float in the first powder outlet area 100 and the second powder outlet area 200, making it convenient to extract the dust through the powder outlet holes 12, thereby improving the powder selection efficiency.

[0027] Specifically, a volute fan 300 is installed at the outlet end of the powder outlet hole 12, and the volute fan 300 is used to extract the dust floating in the box body 1 to improve the powder selection efficiency.

[0028] like Figures 2 to 4 As shown, guide plates 21 are provided on the plate surfaces of the upper blast plate 2 and the lower blast plate 3. The guide plates 21 may be in a runway shape, an S shape, or other shapes, as long as the quicksand-like powder can flow along the guide plates 21, guiding the powder to flow down from the plate surfaces of the upper blast plate 2 and the lower blast plate 3, thereby playing a guiding role and preventing the powder from accumulating on the plate surfaces of the upper blast plate 2 and the lower blast plate 3.

[0029] Specifically, the blowing direction of the upper blow plate 2 and the lower blow plate 3 is adjustable because the hood is detachably installed on the upper blow plate 2 and the lower blow plate 3. The air outlet direction can be adjusted by replacing the hood with air outlets at different angles. For example, the hood can be a vertical upper blow plate 2 and a lower blow plate 3 connected to each other for blowing, or the hood can have horizontal openings on the side for air outlet, or the hood can have an upwardly inclined air outlet on the side. The specific angle is not limited. By replacing the hood with different air outlets, the design purpose of adjustable blowing is achieved, and multi-angle blowing and powder selection can be achieved without leaving dead ends.

[0030] like Figure 1As shown, the vibrating screen 3 is tilted, and a sedimentation box 31 is provided at the lower end of the vibrating screen 3. A spiral stirring roller 32 is provided in the sedimentation box 31. Both ends of the spiral stirring roller 32 are movable through the sedimentation box 31, and both ends of the spiral stirring roller 32 are connected to the side wall of the box body 1 through the bearing seat. Specifically, in this embodiment, the vibrating screen 3 is tilted so that the powder falling from the upper blast plate 2 can slide down the vibrating screen 3, thereby improving the vibration screening efficiency. It is understandable that some powders with larger particle sizes and agglomerated powders will enter the sedimentation box 31 at the lower end of the vibrating screen 3 along the vibrating screen 3. The sedimentation box 31 is made of metal and has an opening at the upper end, which is convenient for the powder to enter without obstruction. A spiral stirring roller 32 is installed in the sedimentation box 31. Both ends of the spiral stirring roller 32 extend from the sedimentation box 31 and are movably connected to the bearing seat installed on the box body 1. An external driving motor can drive the spiral stirring roller 32 to rotate in the sedimentation box 31, stir the powder deposited in the sedimentation box 31, avoid powder deposition, and prevent the dust inside from being blown out, ensuring that the powder that meets the particle size range is screened out.

[0031] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. Integrated powder selection equipment, characterized by: It includes a box body, an upper blast plate, a vibrating screen and a lower blast plate, the box body is hollow, the upper blast plate and the lower blast plate are installed in the box body at intervals from top to bottom, the vibrating screen is installed between the upper blast plate and the lower blast plate, the feed inlet of the vibrating screen is connected with the discharge port of the upper blast plate, the discharge port of the vibrating screen is located above the lower blast plate, the box body is also provided with a feed hole and a powder discharge hole, and the wind pressure blown out by the upper blast plate is less than the wind pressure blown out by the lower blast plate.

2. The integrated powder selection device according to claim 1, characterized in that: Heating wires are arranged inside the upper blast plate and the lower blast plate.

3. The integrated powder selection device according to claim 2, characterized in that: The heating wire is heated by electromagnetic induction.

4. The integrated powder selection device according to claim 1, characterized in that: The bottom of the box body is provided with a discharge hole.

5. The integrated powder selection device according to claim 1, characterized in that: The upper blast plate and the lower blast plate divide the box body to form a first powder outlet area and a second powder outlet area, and the two powder outlet holes are respectively connected to the first powder outlet area and the second powder outlet area.

6. The integrated powder selection device according to claim 5, characterized in that: A volute fan is installed at the outlet end of the powder outlet.

7. The integrated powder selection device according to claim 1, characterized in that: Guide plates are arranged on the plate surfaces of the upper air blast plate and the lower air blast plate.

8. The integrated powder selection device according to claim 1, characterized in that: The blowing directions of the upper blowing plate and the lower blowing plate are adjustable.

9. The integrated powder selection device according to claim 1, characterized in that: The number of the upper blowing plates is one or more.

10. The integrated powder selection device according to claim 1, characterized in that: The vibrating screen is arranged obliquely, and a deposition box is arranged at the lower end of the vibrating screen. A spiral stirring roller is arranged in the deposition box. Both ends of the spiral stirring roller movably penetrate the deposition box, and both ends of the spiral stirring roller are connected to the side wall of the box body through a bearing seat.

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