Double-butterfly-valve destaticizing discharging device suitable for nanometer rare earth powder granulation

Abstract

The utility model provides a double-butterfly-valve destaticizing blanking device suitable for nano rare earth powder granulation, which comprises a blanking cavity, an upper valve is arranged at the upper part of the blanking cavity, a lower valve is arranged at the lower part of the blanking cavity, and a material receiving bag is arranged at a discharge port at the lower end of the lower valve; a balance air opening is formed in the middle of the discharging cavity and externally connected with an air inlet pipe. The front end of the air inlet pipe is an air inlet, the middle section of the air inlet pipe is an ionization cavity, and the tail end is communicated with a balance air port air path; a fan is arranged in the air inlet; a plurality of electrodes are sequentially arranged on the inner wall of the ionization cavity. The discharging device is reasonable in structural design, the air inlet is additionally formed in the discharging cavity, air is subjected to high-pressure ionization through the electrodes, powder is blown by ionic wind during air inlet, static electricity caused by falling friction is removed, and operation inconvenience caused by wizened material receiving bags during discharging can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of powder conveying, in particular to a double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation. Background Art

[0002] The double butterfly valve feeding system is a commonly used powder feeding device. For example, the feeding device for powder materials disclosed in CN201922453137.3 includes a feeding pipe, which has a material storage and feeding cavity that passes through from top to bottom, and an upper automatic butterfly valve for opening and closing the upper opening of the material storage and feeding cavity is provided at the upper end of the feeding pipe, and a lower automatic butterfly valve for opening and closing the lower opening of the material storage and feeding cavity is provided at the lower end of the feeding pipe.

[0003] During the feeding process of nano rare earth powder, it is necessary to design a receiving bag under the double butterfly valve feeding system. However, the traditional double butterfly valve feeding system has its own design defects. This defect causes the air pressure in the cavity between the upper and lower valves to be the same as the air pressure in the tower body after the upper valve is opened and closed once. When the lower valve is opened, the air in the receiving bag will be extracted. After multiple openings and closings, the volume of the receiving bag decreases due to vacuum shrinkage deformation. At this time, replacing the receiving bag will greatly increase the possibility of leakage and spillage of the receiving bag. Powders exposed to the working environment also make the powders very easy to be contaminated and more likely to be suspended in the air to form dust, which not only reduces the yield, but also pollutes the working environment and threatens the health of operators. Because it is inevitable that static electricity will be generated by friction between the powders during the falling process, it is more likely that static electricity will adhere to each other due to friction, affecting the next step of processing and ultimately affecting product performance. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the shortcomings of the existing technology, the utility model provides a double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation, which can effectively avoid the operational inconvenience caused by the shrinkage of the receiving bag during feeding, ensure the normal air pressure in the cavity, and effectively remove the static electricity of the powder to complete the feeding operation.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation, comprising a feeding cavity, an upper valve is arranged on the upper part of the feeding cavity, a lower valve is arranged on the lower part of the feeding cavity, and a receiving bag is arranged at the discharge port at the lower end of the lower valve; a balancing air outlet is arranged in the middle part of the feeding cavity, and an air inlet pipe is connected to the outside of the balancing air outlet; the front end of the air inlet pipe is the air inlet, the middle section of the air inlet pipe is the ionization chamber, and the rear end is connected to the air path of the balancing air outlet; a fan is arranged in the air inlet; and a plurality of electrodes are arranged in sequence on the inner wall of the ionization chamber.

[0006] In the above scheme, in order to solve the problem that the traditional unloading system easily causes the powder to generate static electricity and the receiving bag is easy to shrink and deform, a balancing air outlet is creatively opened on the unloading cavity. The air introduced from the balancing air outlet is ionized by the electrode. When the balancing air outlet is filled with air, the unloaded powder is swept by the ion wind to remove the static electricity caused by the falling friction, effectively preventing the receiving bag below from shrinking and deforming.

[0007] Furthermore, in order to provide sufficient and effective air intake, a fan for sucking gas into the ionization chamber is provided at the inner side of the air inlet.

[0008] Furthermore, a filter is provided at the air inlet position at the front end of the air inlet pipe. The filter can filter the incoming air to ensure that the air entering the air inlet pipe and the material discharge cavity will not pollute the working environment of the material discharge.

[0009] At the same time, a check valve is provided at the tail end of the air inlet pipe corresponding to the ionization chamber, and the check valve can prevent air from flowing back into the ionization chamber, ensuring that the ionization chamber is dry and clean, which is beneficial to extending the service life and ensuring that the product is not contaminated by impurities.

[0010] Furthermore, the air inlet pipe is connected to an air outlet at the rear end of the check valve, and an air outlet air valve is arranged in the air outlet. Through the action of the air outlet and the air outlet air valve, air is effectively exhausted to the outside, and the air pressure in the material discharge cavity is controlled to become normal atmospheric pressure.

[0011] Preferably, an air pressure sensor is provided at the connection position between the air inlet pipe and the balance air outlet, and the air pressure in the material discharge cavity can be effectively measured by the air pressure sensor, which is convenient for on-demand control.

[0012] Preferably, the ionization chamber comprises, from front to back, a gradually expanding section, a cylindrical section and a gradually contracting section, and the electrode is located in the cylindrical section.

[0013] The beneficial effect of the utility model is that the double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation provided by the utility model has a reasonable structural design and an air inlet is added to the feeding chamber. Since the air is ionized by the high voltage of the electrode, the powder is swept by the ion wind when the air enters, and the static electricity caused by the friction of falling is removed, which can avoid the inconvenience of operation caused by the shrinkage of the receiving bag during feeding. The check valve can ensure that the ionization chamber is dry and clean, which is conducive to extending the service life and ensuring that the product is not contaminated by impurities. The air outlet is equipped with a filter to ensure that there is no pollution to the working environment. The air pressure sensor can control the air intake and the air valve according to the pressure in the cavity to ensure that the air pressure in the cavity is normal. In practical applications, this utility model patent can greatly improve work efficiency and effectively remove static electricity from powders, facilitate further processing, and improve product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the optimal embodiment of the utility model (the direction of the arrow is the direction of air flow).

[0016] In the figure, 1, fan 2, ionization chamber 3, check valve 4, air pressure sensor 5, upper valve 6, lower valve 7, electrode 8, air outlet and air outlet valve 9, material discharge chamber 10, material receiving bag 12, and balance air outlet. DETAILED DESCRIPTION

[0017] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0018] like Figure 1 The double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation is the best embodiment of the utility model.

[0019] Specifically, the material discharging device comprises a material discharging cavity 9. An upper valve 5 is arranged at the upper part of the material discharging cavity 9, a lower valve 6 is arranged at the lower part, and a material receiving bag 10 is arranged at the material discharging port at the lower end of the lower valve 6.

[0020] In view of the problem that the conventional feeding system easily generates static electricity in the powder and the receiving bag 10 easily shrinks and deforms, in this embodiment, a balancing air port 12 is opened in the middle of the feeding cavity 9, and an air inlet pipe is connected to the balancing air port 12. An air pressure sensor 4 is provided at the connection position between the air inlet pipe and the balancing air port 12, and the air pressure sensor 4 can effectively measure the air pressure in the feeding cavity 9.

[0021] The front end of the air inlet pipe is an air inlet, and a fan 1 is provided inside the air inlet to suck gas into the ionization chamber 2. A filter is provided at the air inlet position at the front end of the air inlet pipe. The filter can filter the incoming air to ensure that the air entering the air inlet pipe and the material discharge cavity 9 will not pollute the working environment of the material discharge.

[0022] The middle section of the air inlet pipe is the ionization chamber 2. Several electrodes 7 are arranged in sequence on the inner wall of the ionization chamber 2. The tail end is connected to the air path of the balance air outlet 12. In the actual selection design, the ionization chamber 2 includes a gradually expanding section, a cylindrical section and a gradually contracting section from front to back, and the electrode 7 is located in the cylindrical section, that is, the air inlet pipe is expanded outward relative to the head and tail ends at the position of the ionization chamber 2 to form a cylindrical section with a diameter larger than the diameter of the head and tail ends. The cylindrical section formed by the outward expansion can facilitate the installation of the electrode 7 structure on the inner wall of the cylindrical section, and on the premise of ensuring effective ventilation in the cylindrical section, ion wind can be formed by ionizing the air.

[0023] The air introduced by the fan 1 from the air inlet is ionized by the electrode 7 at high voltage to become ionized wind, and then passes through the check valve 3, enters the rear end of the air inlet pipe, and enters the material discharge cavity 9 through the balance air port 12. When the balance air port 12 enters, the powder being discharged is swept by the ionized wind to remove the static electricity caused by the falling friction, effectively preventing the material receiving bag 10 below from shrinking and deforming.

[0024] During this process, in order to prevent air from flowing back into the ionization chamber 2 and ensure that the ionization chamber 2 is dry and clean, a check valve 3 is provided at the tail end of the air inlet pipe corresponding to the ionization chamber 2, which can help extend the service life and ensure that the product is not contaminated by impurities.

[0025] At the same time, the air inlet pipe is connected to an air outlet at the rear end position of the check valve 3, and an air outlet air valve is arranged in the air outlet. Through the action of the air outlet and the air outlet air valve, air is effectively exhausted to the outside, and the air pressure in the material discharge cavity 9 is controlled to become normal atmospheric pressure.

[0026] Working process:

[0027] 1. Start the upper valve 5, the powder falls, and the air pressure in the feeding chamber decreases.

[0028] 2. After the air pressure measured by the air pressure sensor 4 reaches the air pressure inside the tower, close the upper valve 5 and start the fan 1. After the air passes through the filter, it is introduced into the ionization chamber 2 by the fan 1. After the air is ionized by the high voltage of the electrode 7, it becomes ion wind.

[0029] 3. Open the check valve 3, close the air outlet valve, and use the ion wind to purge the powder in the feeding cavity 9, so that the powder is fully exposed to the ion wind to remove static electricity.

[0030] 4. The air pressure sensor 4 measures the air pressure in the material discharging cavity 9, closes the fan 1 and the electrode 7, and opens the air outlet valve to make the air pressure in the material discharging cavity 9 normal atmospheric pressure.

[0031] 5. Open the lower valve 6, the powder falls into the receiving bag 10, and then close the lower valve 6. This completes a material discharge process.

[0032] In this way, a double butterfly valve anti-static unloading device suitable for nano rare earth powder granulation provided in this embodiment is used to complete a unloading process. By adding a balancing air outlet 12 to the unloading cavity 9 and ionizing the incoming air to form ion wind, the static electricity caused by the falling friction can be effectively removed, and the inconvenience caused by the shrinkage of the receiving bag 10 during unloading can be avoided. The check valve 3 can ensure that the ionization chamber 2 is dry and clean, which is beneficial to extend the service life and ensure that the product is not contaminated by impurities. A filter is installed at the air inlet position, which can effectively filter the incoming air to ensure that the incoming air does not pollute the working environment. The air pressure sensor 4 can control the air intake and the air valve according to the pressure in the cavity to ensure that the air pressure in the unloading cavity 9 is normal. In practical applications, it can greatly improve work efficiency, effectively remove powder static electricity, facilitate further processing, and improve product performance.

[0033] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation, characterized by: It comprises a material discharge cavity (9), wherein an upper valve (5) is provided at the upper part of the material discharge cavity (9), a lower valve (6) is provided at the lower part, and a material receiving bag (10) is provided at the discharge port at the lower end of the lower valve (6); A balancing air outlet (12) is provided in the middle of the material discharging cavity (9), and an air inlet pipe is externally connected to the balancing air outlet (12); The front end of the air inlet pipe is an air inlet, the middle section of the air inlet pipe is an ionization chamber (2), and the rear end is connected to the balance air outlet (12) by air path; A fan (1) is provided in the air inlet; A plurality of electrodes (7) are arranged in sequence on the inner wall of the ionization chamber (2).

2. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation as claimed in claim 1, characterized in that: A fan (1) for sucking gas into the ionization chamber (2) is provided at the inner side of the air inlet.

3. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation as claimed in claim 2, characterized in that: A filter is arranged at the air inlet position at the front end of the air inlet pipe.

4. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation as claimed in claim 1, characterized in that: A check valve (3) is provided at the tail end of the air inlet pipe corresponding to the ionization chamber (2).

5. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation as claimed in claim 4, characterized in that: The air inlet pipe is connected to an air outlet at a position corresponding to the rear end of the check valve (3), and an air outlet air valve is arranged in the air outlet.

6. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation as claimed in claim 1, characterized in that: An air pressure sensor (4) is provided at the connection position between the air inlet pipe and the balance air outlet (12).

7. A double butterfly valve anti-static feeding device suitable for nano rare earth powder granulation as claimed in claim 1, characterized in that: The ionization chamber (2) comprises, from front to back, a gradually expanding section, a cylindrical section and a gradually contracting section, and the electrode (7) is located in the cylindrical section.

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