Superfine iron powder drying device

Abstract

The utility model provides a superfine iron powder drying device which comprises a drying device body and a sealing door which can be opened and closed and is connected to the surface of the drying device body in a sealing mode, a cavity is formed in the drying device body, an air inlet is formed in the surface of the drying device body, and a drying cylinder is arranged in the cavity. At least one hot air pipeline is arranged around the drying cylinder, a plurality of air supply pipes are evenly arranged on the surface of the hot air pipeline, and a plurality of open holes used for fixing the air supply pipes are formed in the surface of the drying cylinder. According to the superfine iron powder drying device, hot air can circulate and make comprehensive contact with superfine iron powder, the problem that the superfine iron powder is caked after being dried by an existing drying device can be effectively solved, and meanwhile operation is easy, efficiency is high, and resource waste is small.

Description

Technical Field

[0001] The utility model belongs to the technical field of iron powder drying devices, in particular to an ultra-fine iron powder drying device. Background Art

[0002] Ultrafine iron powder is one of the basic raw materials of powder metallurgy industry. Due to its large specific surface area and activity, it has special properties such as electricity, magnetism, light, catalysis, adsorption and chemical reactivity. Therefore, it has a wide range of uses, mainly used in powder metallurgy, manufacturing mechanical parts, production of friction materials, friction-reducing materials, superhard materials, magnetic materials, lubricants and their products; secondly, iron powder is widely used in chemical industry, cutting, heating materials, welding rods, etc. In recent years, iron powder also has broad application prospects in many fields such as electromagnetism, biology, medicine, optics, etc.

[0003] Drying is an indispensable process in the processing of ultrafine iron powder. After drying, the moisture on the surface of the ultrafine iron powder is removed, so that the iron powder can be better used in production. In the prior art, iron powder is mostly dried by a drum. When this method is used for drying, moisture is discharged from the bottom of the device, and the iron powder to be dried in the drum repeatedly contacts the moisture to be discharged, which affects the drying efficiency of the ultrafine iron powder and generates a large amount of resource waste. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a superfine iron powder drying device.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A superfine iron powder drying device comprises a drying device body and a sealing door which can be opened and closed and is sealed and connected to the surface of the drying device body. There is a cavity in the drying device body, an air inlet is arranged on the surface of the drying device body, a drying cylinder is arranged in the cavity, at least one hot air duct is arranged around the drying cylinder, a plurality of air supply pipes are evenly arranged on the surface of the hot air duct, a plurality of openings for fixing the air supply pipes are opened on the surface of the drying cylinder, and the air inlet of the hot air duct is connected to the air inlet located on the surface of the drying device body; a central shaft is arranged at the central position in the drying cylinder, a driving motor is connected to the transmission shaft connected to the central shaft through belt drive; a plurality of holes for fixing the air supply pipes are arranged around the surface of the central shaft A slide groove of a fixed drying chamber, and a sliding protrusion connected to the slide groove is respectively arranged on one side of each drying chamber; the drying chamber comprises two side plates symmetrically arranged, two super-dense meshes symmetrically arranged between the two side plates, a blocking plate arranged at one end of the two super-dense meshes, and a detachable cover plate arranged at the other end of the two super-dense meshes, the mesh size of the super-dense mesh is smaller than the particle size of the ultra-fine iron powder to be dried; a drainage hole is opened at the lowest point of the drying cylinder, a liquid collecting pipe is connected to the bottom of the drainage hole through a water collecting plate, and the water outlet of the liquid collecting pipe is connected to the drainage pipe; a heating device for providing hot air for the device is connected at the bottom end of the drying device body through an air inlet pipe, and the air outlet of the heating device is connected to the air inlet of the hot air pipe through a hot air delivery pipe.

[0007] At least one group of filter ducts for filtering external air is arranged at the air outlet end of the air inlet.

[0008] The air inlet end of the filter pipe is connected to the air inlet, and the air outlet of the filter pipe is connected to the heating device through the air inlet pipe; an exhaust port is opened on one side of the drying device body.

[0009] The drying device comprises a blower and an electric heating wire located at the air outlet of the blower.

[0010] The water inlet end of the drainage pipe is higher than the water outlet end of the drainage pipe.

[0011] The water collecting plates are distributed obliquely below the drying drum, the front ends of the water collecting plates are far away from each other, and the bottom ends of the water collecting plates are close to each other.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model places ultrafine iron powder in a drying chamber, and the two surfaces of the drying chamber are mesh structures. The mesh holes of the mesh structure are not large enough to pass the ultrafine iron powder. After the drying chamber is driven by the central axis to rotate, the hot air transmitted into the drying cylinder by the air inlet duct passes through the ultra-dense gauze and comes into contact with the ultrafine iron powder inside the drying chamber. At the same time, along with the rotation, the ultrafine iron powder is displaced in the drying chamber, increasing the contact surface with the airflow, so that the drying uniformity of the device is better and the efficiency is faster.

[0014] 2. The hot air duct arranged around the outside of the drying drum allows the hot air to enter the drying drum evenly and completely, and come into full contact with the ultrafine iron powder in the drying chamber. The device has high contact efficiency, avoiding the problem of resource consumption caused by repeated contact of the ultrafine iron powder at the bottom of the existing drum with the water to be discharged during rotation.

[0015] 3. The device adopts a chute design, which is easy to install and clean. It can also be used with a filter pipe to make the air entering the device purer, avoiding the reaction between impurities in the air and the ultrafine iron powder, which will affect the quality of the ultrafine iron powder.

[0016] 4. The utility model can make hot air circulate and fully contact the ultrafine iron powder, which can avoid the problem of ultrafine iron powder agglomeration after drying by the existing drying device. At the same time, it is simple to operate, highly efficient, has little waste of resources, and provides a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a drying drum of the utility model;

[0019] Figure 3 It is a schematic diagram of the connection structure between the air intake pipe and the heating device in the utility model;

[0020] Figure 4 It is a schematic diagram of the connection structure between the central axis and the drying chamber in the utility model.

[0021] In the figure:

[0022] 1. Drying device body; 1a. Filter duct; 1b. Air inlet duct; 1c. Heating device; 1d. Transmission shaft; 1e. Driving motor; 2. Closing groove; 3. Sealing door; 4. Sealing protrusion; 5. Air inlet; 6. Drying cylinder; 7. Side plate; 71. Sliding protrusion; 72. Cover plate; 8. Super dense mesh; 9. Cavity; 10. Water collecting plate; 11. Liquid collecting pipe; 12. Drainage duct; 13. Hot air conveying pipe; 14. Slide chute; 15. Exhaust port; 16. Center axis. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0024] As attached Figure 1-4 shown.

[0025] A superfine iron powder drying device comprises a drying device body 1, a sealing door 3 is installed on the surface of the drying device body 1 so as to be opened and closed, a sealing structure is arranged around the drying device body 1, and a fitting structure is arranged around the inner wall of the sealing door 3. When the sealing door 3 fits the drying device body 1, the sealing structure and the fitting structure are in contact, and a sealed connection is formed between the sealing door 3 and the drying device body 1; the aforementioned sealing structure and fitting structure can be realized by groove connection, sealing strip fitting, etc.

[0026] There is a cavity 9 inside the drying device body 1, and a drying cylinder 6 is installed at the center position of the cavity 9. The front end wall of the drying cylinder 6 fits the front end wall of the drying device body 1, and there is a space between the rear wall of the drying cylinder 6 and the inner wall of the drying device body 1; the outside of the drying cylinder 6 contacts the inner wall of the drying device body 1, the inside of the drying cylinder 6 is hollow, and the front end of the drying cylinder 6 is open. A center axis 16 is arranged at the center position of the rear end surface of the drying cylinder 6, and the rear end of the center axis 16 passes through the surface of the drying cylinder 6 and is connected to the transmission shaft 1d located on the rear side of the drying cylinder 6. A driving motor 1e is arranged below the drying cylinder 6 and at a corner of the bottom end of the drying device body 1, and the shaft end of the driving motor 1e is connected to the transmission shaft 1d through a belt.

[0027] A plurality of slide grooves 14 are arranged on the outer wall of the central axis 16, and a drying chamber is slidably connected in each slide groove 14 through a sliding protrusion 71; the drying chamber comprises two symmetrically arranged side panels 7, ultra-dense gauze 8 symmetrically arranged on the upper and lower sides of the side panels 7, a blocking plate located at one end of the two ultra-dense gauze 8 and located between the two side panels 7, and a cover plate 72 corresponding to the blocking plate and actively installed at the other end of the ultra-dense gauze 8. In order to avoid the drying chamber from coming out of the groove during rotation, when the cover plate 72 is connected to the ultra-dense gauze 8, the cover plate 72 is The bottom end surface of the plate 72 is connected to the outer end surface of the slide 14, wherein the mesh size of the super-dense gauze 8 is smaller than the particle size of the ultra-fine iron powder to be dried. When in use, the user puts the ultra-fine iron powder to be dried into the drying chamber, and then covers it with the cover plate 72. The ultra-fine iron powder to be dried is blocked by the super-dense gauze 8 and cannot enter or exit the drying chamber. The user places several drying chambers in several slides 14 respectively, and then covers the cover plate 72 on the front end of the super-dense gauze 8 and connects it to the outer end surface of the slide 14 to fix the position of the drying chamber.

[0028] A heating device 1c is provided on one side of the driving motor 1e, and the heating device 1c includes a blower for sucking in air, an air intake pipe 1b connected to the air intake end of the blower for conveying external air to the negative pressure pump, a heat conductive mesh located on the inner side of the air outlet of the negative pressure pump, a heating wire densely woven on the heat conductive mesh for heating the external air, and a hot air conveying pipe 13 for conveying hot air to the drying drum 6.

[0029] At least one hot air duct is arranged around the periphery of the drying cylinder 6. In order to reduce the floor space occupied by the hot air duct, the hot air duct can be arranged in an embedded manner. The air inlet of the hot air duct is connected to the air outlet of the hot air delivery pipe 13. A plurality of air outlets for air outlet are arranged at intervals on the hot air duct. The surface of the air outlet is connected to the air supply pipe by threads. An opening for the air supply pipe to pass through and fix the air supply pipe is arranged on the surface of the drying cylinder 6. It should be noted that the drying cylinder 6 has a certain width. In actual use, a hot air duct may have a blind spot for heating. Therefore, it is optimal to arrange three hot air ducts. The middle one of the three hot air ducts should be located in the middle of the outer wall of the drying cylinder 6, and the other two hot air ducts should be symmetrically distributed near the outer edge of the drying cylinder 6. Since the hot air duct needs to surround the outer wall of the drying cylinder 6, the hot air duct needs to adopt a hose. Since the hot air duct needs to transport high-temperature airflow, the hot air duct needs to have high temperature resistance.

[0030] A plurality of water outlets are provided at the bottom end of the device and located at the bottommost position of the drying cylinder 6. Corresponding to the water outlets and located below the drying cylinder 6, two water collecting plates 10 with their bottom ends gradually approaching each other are provided. The water discharged from the drying cylinder 6 is collected by the water collecting plates 10 and sent to the liquid collecting pipe 11. The bottom end of the liquid collecting pipe 11 is connected to the drainage port located on the outer surface of the drying device body 1 through the drainage pipe 12.

[0031] A temperature sensor and a humidity sensor are provided inside the drying drum 6. The temperature sensor is used to detect the temperature inside the drying drum 6. If the temperature sensor detects that the temperature inside the drying device body 1 is too high, the solenoid valve at the exhaust port 15 is controlled to open. At this time, the hot air inside the device is discharged until the temperature sensor detects that the temperature inside the device returns to normal; the humidity sensor is used to detect the humidity inside the device. The temperature sensor and the humidity sensor are respectively connected to the input end of the PLC through connecting wires. At the same time, a touch display screen is connected to the output end of the PLC. A touch module for supporting touch display screen input is provided at the input end of the PLC. A drive motor 1e is connected to the output end of the PLC through a drive module. The blower and the heating wire are also connected to the output end of the PLC. The above-mentioned electronic components all adopt well-known models in the technical field and are not limited here. At the same time, a heat dissipation port is required at the position where the PLC or the above-mentioned electronic components are installed in the drying drum 6 for heat dissipation of the electronic components.

[0032] As the optimal embodiment, the working principle of the present application is: the user first connects the device to an external control power supply, opens the sealing door 3 on the surface of the drying device body 1, and then puts the ultrafine iron powder to be dried into the cavity between the two dense meshes 8, and connects the drying chamber to the outer surface of the central axis 16 through the sliding protrusion 71 and the slide groove 14. The cover plate 72 is covered on one end of the ultra-dense mesh 8 and connected to the outer end surface of the slide groove 14 to fix the drying chamber. After repeatedly setting the drying chamber, close the sealing door 3, and the closed groove 2 set on the surface of the drying device body 1 is connected to the sealing protrusion 4 located on the surface of the sealing door 3. The drying device body 1 is sealed, and the user controls the device to power on by controlling the power supply. At this time, the temperature sensor and the humidity sensor start working, and the temperature and humidity in the device are displayed in real time on the display screen on the surface of the device.

[0033] The PLC drives the central shaft 16 to rotate through the belt by the driving motor 1e, and part of the water on the surface of the ultra-fine iron powder in the drying chamber is discharged through the ultra-dense mesh 8 and drips onto the water collecting plate 10. The water collecting plate 10 collects the discharged water through the liquid collecting pipe 11 and discharges it to the drainage pipe 12;

[0034] When the blower is working, external air enters the air inlet duct 1b through the air inlet 5, and the air in the air inlet duct 1b flows to the blower outlet through the blower inlet, contacts the electric heating wire at the blower outlet end, and the external air is converted into hot air by the heating of the electric heating wire. The hot air enters the air supply duct through the hot air duct, and the pipe mouth of the air supply duct blows into the drying cylinder 6, and high temperature is generated in the drying cylinder 6. At this time, the PLC controls the drive motor 1e to rotate, and the drive motor 1e rotates to drive the drying chamber to rotate. The hot air in the drying cylinder 6 circulates through the ultra-dense gauze 8 and contacts the ultra-fine iron powder in the ultra-dense gauze 8. The moisture in the ultra-fine iron powder contacts the hot air and is heated to generate water vapor, which separates from the ultra-fine iron powder and flows outside the ultra-dense gauze 8.

[0035] Due to the generation of water vapor, the humidity of the drying cylinder 6 increases. After the humidity sensor detects the increase in humidity, it controls the solenoid valve at the exhaust port 15 to open, and part of the gas is discharged through the exhaust port 15. After the humidity returns to normal, the exhaust port 15 is closed; then the blower starts to transmit new hot air to the drying cylinder 6, and this is repeated to dry the ultrafine iron powder.

[0036] As another embodiment, in order to improve the drainage efficiency of the device, the height of the water inlet of the drainage pipe 12 is higher than the height of the water outlet of the drainage pipe 12, and the rest is the same as the above embodiment.

[0037] As another embodiment, in order to improve the cleanliness of the drying air of the device and prevent impurities in the air from entering the device and affecting the ultrafine iron powder, the air inlet 5 is set on the upper part of the side wall of the drying device body 1, and a manifold is connected to the end of the air inlet 5. The bottom end of the manifold is provided with a plurality of openings, each of which is connected to a filter pipe 1a, and an air filter element for filtering external air is provided in the filter pipe 1a; the lower ends of all the filter pipes 1a are connected to an air transmission pipe, and the air outlet end of the air transmission pipe is connected to the air inlet pipe 1b, and the rest is the same as the optimal embodiment.

[0038] As another embodiment, in order to improve the drying efficiency of the device, the side plate 7 has thermal conductivity, and the rest is the same as the optimal embodiment.

[0039] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. An ultrafine iron powder drying device, comprising a drying device body (1) and a sealing door (3) which is openable and closable and is sealed and connected to the surface of the drying device body (1); a cavity (9) is present in the drying device body (1); an air inlet (5) is provided on the surface of the drying device body (1); a drying cylinder (6) is provided in the cavity (9), and the drying device body (1) is characterized in that: At least one hot air duct is arranged around the drying cylinder (6), a plurality of air supply ducts are evenly arranged on the surface of the hot air duct, a plurality of openings for fixing the air supply ducts are opened on the surface of the drying cylinder (6), and the air inlet of the hot air duct is connected to the air inlet (5) located on the surface of the drying device body (1); a central shaft (16) is arranged at a central position inside the drying cylinder (6), and a driving motor (1e) is connected to a transmission shaft (1d) connected to the central shaft (16) through a belt drive; a plurality of slide grooves (14) for fixing the drying chamber are arranged around the surface of the central shaft (16), and a sliding protrusion (71) connected to the slide groove (14) is respectively arranged on one side of each drying chamber; the drying chamber comprises symmetrically arranged Two side plates (7), two ultra-dense meshes (8) symmetrically arranged between the two side plates (7), a blocking plate arranged at one end of the two ultra-dense meshes (8), and a detachable cover plate (72) arranged at the other end of the two ultra-dense meshes (8), wherein the mesh size of the ultra-dense meshes (8) is smaller than the particle size of the ultra-fine iron powder to be dried; a drainage hole is provided at the lowest point of the drying cylinder (6), a liquid collecting pipe (11) is connected directly below the drainage hole through a water collecting plate (10), and the water outlet of the liquid collecting pipe (11) is connected to a drainage pipe (12); a heating device (1c) for providing hot air to the drying device is connected at the bottom end of the drying device body (1) through an air intake pipe (1b), and an air outlet of the heating device (1c) is connected to an air inlet of the hot air pipe through a hot air delivery pipe (13).

2. The ultrafine iron powder drying device according to claim 1, characterized in that: At least one group of filter ducts (1a) for filtering external air is arranged at the air outlet end of the air inlet (5).

3. The ultrafine iron powder drying device according to claim 2, characterized in that: The air inlet end of the filter pipe (1a) is connected to the air inlet (5), and the air outlet of the filter pipe (1a) is connected to a heating device (1c) via an air inlet pipe (1b).

4. The ultrafine iron powder drying device according to claim 1, characterized in that: The drying device comprises a blower and an electric heating wire located at the air outlet of the blower.

5. The ultrafine iron powder drying device according to claim 1, characterized in that: The water inlet end of the drainage pipe (12) is higher than the water outlet end of the drainage pipe (12).

6. The ultrafine iron powder drying device according to claim 1, characterized in that: An exhaust port (15) is provided on one side of the drying device body (1).

7. The ultrafine iron powder drying device according to claim 6, characterized in that: The water collecting plate (10) is distributed obliquely below the drying cylinder (6).

8. The ultrafine iron powder drying device according to claim 7, characterized in that: The front ends of the water collecting plates (10) are far away from each other, and the bottom ends of the water collecting plates (10) are close to each other.

Images