Vacuum pipeline powder removing structure of electrode induction melting gas atomization powder making furnace

Abstract

The utility model relates to a vacuum pipeline powder removing structure of an electrode induction melting gas atomization powder making furnace, and belongs to the technical field of metal powder preparation. Comprising a vacuum pump set (1), a cyclone separator (9), a vacuum tube A (17) and a vacuum tube B (2), two ends of the vacuum tube A (17) are connected with a feeding chamber (13) and the vacuum pump set (1), an extraction valve A (11) is arranged on the vacuum tube A (17), one end of the vacuum tube B (2) is connected with an atomizing chamber (16), the other end of the vacuum tube B (2) is connected with an inlet of the cyclone separator (9), an extraction valve B (12) is arranged on the vacuum tube B (2), a powder collecting tank (10) is arranged at the lower end of the cyclone separator (9), and the upper end of the cyclone separator (9) is connected with the vacuum pump set (1). According to the structure, the vacuumizing efficiency is improved through two sets of pipelines, and the service life of the vacuum pump is prolonged through the cyclone separator (9). The problems that an existing feeding chamber and an atomizing chamber share the same vacuumizing pipeline, the vacuumizing speed is low, and the independent vacuumizing time of the feeding chamber is long and the efficiency is low during rod replacement are solved.

Description

Technical Field

[0001] This utility model relates to a dust removal structure for a vacuum pipeline in an electrode induction melting gas atomization powder making furnace, belonging to the field of metal powder preparation technology. Background Technology

[0002] Electrode induction melting gas atomization technology, also known as EIGA technology, involves vertically placing a metal rod in a feeding chamber under an inert gas protective environment. A high-frequency induction coil heats the lower tip of the metal rod, causing it to melt rapidly. Molten metal droplets drip from the end of the rod. Inside the melting chamber, high-speed argon gas through an annular nozzle impacts the molten metal droplets, breaking them into tiny droplets that enter the atomization chamber. The droplets cool and solidify during their flight, forming spherical metal powder. The metal powder is collected after being cooled by argon gas, with some powder remaining in the atomization chamber and on the inner wall of the pipe.

[0003] After the powder from the previous melting and atomization process is collected, some powder remains inside the equipment. Before the next shift, the entire feeding chamber and atomization chamber need to be evacuated. During this evacuation process, the remaining powder is carried to the vacuum pump by the high-speed airflow, which over time damages the pump's structure and reduces its vacuuming capacity. Furthermore, the feeding chamber and atomization chamber currently share the same vacuum pipe. Due to the filter element inside the pipe, the pumping speed is reduced, resulting in a longer time required for separate evacuation of the feeding chamber during rod changing, thus impacting production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing feeding chamber and atomization chamber are in the same vacuum pipe, which reduces the pumping speed and causes the feeding chamber to be evacuated separately for a long time during the rod changing process, thus affecting production efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a vacuum pipeline dust removal structure for an electrode induction melting gas atomization pulverizing furnace, including a vacuum pump group, a cyclone separator, a vacuum tube A and a vacuum tube B. One end of the vacuum tube A is connected to the feeding chamber, and the other end is connected to the inlet of the vacuum pump group. An air extraction valve A is provided on the vacuum tube A. One end of the vacuum tube B is connected to the atomization chamber, and the other end is connected to the inlet of the cyclone separator. An air extraction valve B is provided on the vacuum tube B. A dust collection tank is provided at the lower outlet of the cyclone separator, and the upper outlet of the cyclone separator is connected to the inlet of the vacuum pump group.

[0006] In the above structure, a filter is installed between the upper outlet of the cyclone separator and the inlet of the vacuum pump group.

[0007] Furthermore, the filter described above has a removable filter element at its left end, and the filter element is made of non-metallic material.

[0008] Furthermore, in the above structure, a baffle is provided on the right side of the filter, and the baffle is detachably fixed to the right end of the filter by a locking device. The filter is provided with a sealable air inlet pipe.

[0009] In the above structure, a cyclone separator is vertically arranged inside.

[0010] Furthermore, in the above structure, the bottom of the cyclone tube is located below the inlet of the cyclone separator.

[0011] Furthermore, the inner diameter of the cyclone tube in the above structure is 1 / 3 to 1 / 2 of the inner diameter of the cyclone separator.

[0012] In the above structure, butterfly valves are provided at the bottom of the cyclone separator and at the top of the powder collection tank.

[0013] In the above structure, the powder collection tank and the cyclone separator are detachably connected.

[0014] In the above structure, a melting chamber is provided at the lower end of the feeding chamber, and a sealable gate valve is provided between the feeding chamber and the melting chamber. The lower end of the melting chamber is connected to the upper end of the atomization chamber.

[0015] The beneficial effects of this utility model are:

[0016] This structure combines a cyclone separator with a filter to remove powder from vacuum pipelines. The cyclone separator separates most of the powder, which is collected inside the powder collection tank. It is collected periodically, and the powder can be removed by closing the upper and lower valves of the cyclone separator. This part of the powder is uncontaminated and can be directly poured into the powder cylinder for sieving.

[0017] This structure features two vacuum pipelines. The feeding chamber is free of powder, and the vacuum pipeline in the feeding chamber is directly connected to the vacuum pump unit. The air inside the feeding chamber is directly drawn away by the vacuum pump unit, resulting in fast pumping speed and saving the vacuuming time in the feeding chamber during rod changing, thus improving production efficiency. After the previous shift's powder collection, the feeding chamber and atomization chamber are evacuated. A combination of cyclone separator and filter is used to remove powder from the inside of the vacuum pipeline, extending the service life of the vacuum pump.

[0018] This structure improves upon the existing filter structure. The non-metallic filter element is fixed on the left side of the filter, while the right side has a manually openable baffle. The baffle is fixed by a locking device and an air inlet pipe is also provided. When the filter element needs to be replaced, argon gas is first introduced into the filter to prevent air from entering the filter and causing the ultrafine powder to flash. Then, the baffle is opened to directly replace the filter element and clean the metal powder at the bottom of the filter. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] In the diagram: 1. Vacuum pump unit; 2. Vacuum tube B; 3. Filter; 4. Filter element; 5. Baffle; 6. Locking component; 7. Inlet pipe; 8. Cyclone tube; 9. Cyclone separator; 10. Powder collection tank; 11. Extraction valve A; 12. Extraction valve B; 13. Feeding chamber; 14. Melting chamber; 15. Slide valve; 16. Atomization chamber; 17. Vacuum tube A. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1As shown, this utility model discloses a vacuum pipeline dust removal structure for an electrode induction melting gas atomization pulverizing furnace, comprising a vacuum pump unit 1, a cyclone separator 9, a vacuum tube A17, and a vacuum tube B2. One end of the vacuum tube A17 is connected to the feeding chamber 13, and the other end is connected to the inlet of the vacuum pump unit 1. An extraction valve A11 is installed on the vacuum tube A17. One end of the vacuum tube B2 is connected to the atomization chamber 16, and the other end is connected to the inlet of the cyclone separator 9. An extraction valve B12 is installed on the vacuum tube B2. A dust collection tank 10 is installed at the lower outlet of the cyclone separator 9, and the upper outlet of the cyclone separator 9 is connected to the inlet of the vacuum pump unit 1. Those skilled in the art will understand that this structure adds a cyclone separator 9 between the atomization chamber 16 and the vacuum pump unit 1, allowing gas to enter tangentially through the upper part of the separator 9. Gas-solid separation is achieved through the cyclone separator 9, preventing gas from entering the vacuum pump unit 1 and causing damage. The powder falls directly into the powder collection tank 10, and the powder entering the collection tank 10 is uncontaminated and can be directly sieved. Simultaneously, this structure is equipped with two sets of vacuum tubes, namely vacuum tube A17 and vacuum tube B2, which can quickly evacuate the feeding chamber 13 and atomization chamber 16 as needed. In practice, the feeding chamber 13 is empty of powder. The feeding chamber 13 is directly connected to the vacuum pump group 1 through vacuum tube A17, and the air inside the feeding chamber 13 is directly drawn away by the vacuum pump group 1, resulting in fast pumping speed and saving the time spent evacuating the feeding chamber 13 during rod changing, thus improving production efficiency. After the previous shift's powder collection, it is necessary to evacuate the feeding chamber 13 and atomization chamber 16. This structure simultaneously achieves rapid evacuation of the feeding chamber 13 and atomization chamber 16 through vacuum tubes A17 and B2, improving cleaning efficiency and making actual use more convenient. The gate valve 15 between the feeding chamber 13 and the melting chamber 14 is closed, the vacuum pump group 1 is turned on, and the suction valve B12 is opened to evacuate the melting chamber 14 and the atomization chamber 16. The powder inside the melting chamber 14 and the atomization chamber 16 passes through the vacuum tube B2 with the airflow, first through the cyclone separator 9, and then spirals down along the outer wall of the cyclone separator 9 under the action of the cyclone tube 8. Most of the powder enters the powder collection tank 10, while a very small portion of ultrafine powder rises upwards from the middle of the cyclone tube 8 with the airflow and enters the filter 3. The powder is blocked by the filter element 4 of the filter 3, and the remaining gas passes through the filter element 4 and then through the vacuum tube B2 to enter the vacuum pump group 1 and is discharged outside the equipment. The suction valve A11 is opened to evacuate the feeding chamber 13, and the air inside the feeding chamber 13 directly enters the vacuum pump group 1 and is drawn away. When the vacuum degree of both the atomization chamber 16 and the feeding chamber 13 is less than 0.2 Pa, the suction valves B12 and A11 are closed, and the vacuum pump group 1 is shut down.

[0023] Preferably, a filter 3 is provided between the upper outlet of the cyclone separator 9 and the inlet of the vacuum pump group 1 in the above structure. Those skilled in the art will understand that, in order to further achieve powder removal within the vacuum pipeline, this structure preferably provides a filter 3 between the upper outlet of the cyclone separator 9 and the inlet of the vacuum pump group 1, so as to further filter the powder in the airflow within the atomization chamber 16 and prevent it from entering the vacuum pump group 1.

[0024] Preferably, in the above structure, a removable filter element 4 is provided at the left end of the interior of the filter 3, and the filter element 4 is made of a non-metallic material. Those skilled in the art will understand that, to facilitate replacement and reduce operation time, since the airflow enters the inner wall of the filter 3 along the upper part during vacuuming, flows out along the left side after being filtered by the filter element 4, and enters the vacuum pump assembly 1, this structure preferably has a removable filter element 4 at the left end of the interior of the filter 3. In practice, simply replacing the filter element 4 periodically ensures the filtration effect. Furthermore, it is preferable that the filter element 4 is made of a non-metallic material for easy cleaning.

[0025] Preferably, in the above structure, a baffle 5 is provided on the right side of the filter 3. The baffle 5 is detachably fixed to the right end of the filter 3 by a locking member 6. The filter 3 is provided with a sealable air inlet pipe 7. Those skilled in the art will understand that, for the convenience of replacing the filter element 4, this structure preferably provides a baffle 5 on the right side of the filter 3. The filter 3 is a hollow structure with an outlet on the left side and is sealed on the right side by the baffle 5. The baffle 5 is detachably fixed to the right end of the filter 3 by the locking member 6. In practice, removing the locking member 6 allows the baffle 5 to be opened. The sealable air inlet pipe 7 on the filter 3 can be controlled by setting a valve. The air inlet pipe 7 can be directly connected to an external argon gas pipe. When replacing the filter element 4, argon gas is first introduced into the filter 3 to prevent air from entering the filter 3 and causing flash combustion of the ultrafine powder.

[0026] Preferably, the cyclone separator 9 described above has a vertically arranged cyclone tube 8 inside. Those skilled in the art will understand that, to ensure the powder collection effect of the vacuum tube B2, a cyclone tube 8 is actually vertically arranged inside the cyclone separator 9. This allows the airflow to enter the cyclone separator 9 through the left inlet and directly spiral against the inner wall. The powder falls into the powder collection tank 10 under gravity, while the gas passes through the cyclone tube 8 and enters the vacuum pump group 1. Because the cyclone tube 8 is vertically arranged, and its upper end should be connected to the upper outlet of the cyclone separator 9, and because the cyclone tube 8 has a certain length, and the gas can only enter along the lower end of the cyclone tube 8, this structural arrangement ensures, to a certain extent, a low powder content in the gas.

[0027] Preferably, in the above structure, the bottom of the cyclone 8 is located below the inlet of the cyclone separator 9. Those skilled in the art will understand that, in order to reduce the amount of powder entering the cyclone 8, this structure is further preferably such that the bottom of the cyclone 8 is located below the inlet of the cyclone separator 9, so that the gas is spirally separated by the cyclone separator 9 and then enters the cyclone 8 from the lower end for discharge, thus reducing the powder content in the discharged gas.

[0028] Preferably, the inner diameter of the cyclone 8 in the above structure is 1 / 3 to 1 / 2 of the inner diameter of the cyclone separator 9. Those skilled in the art will understand that, in order not to affect the dust removal effect of the cyclone separator 9, the inner diameter of the cyclone 8 is preferably 1 / 3 to 1 / 2 of the inner diameter of the cyclone separator 9, specifically 1 / 3 or 1 / 2.

[0029] Preferably, butterfly valves are provided at the bottom of the cyclone separator 9 and the top of the powder collection tank 10 in the above structure. Those skilled in the art will understand that, in order to facilitate the disassembly and cleaning of the powder collection tank 10, this structure preferably provides butterfly valves at the bottom of the cyclone separator 9 and the top of the powder collection tank 10; closing the butterfly valves allows for the disassembly and cleaning of the powder collection tank 10.

[0030] Preferably, the powder collection tank 10 and the cyclone separator 9 in the above structure are detachably connected. Those skilled in the art will understand that, for ease of disassembly and cleaning of the powder collection tank 10, this structure preferably allows for a detachable connection between the powder collection tank 10 and the cyclone separator 9; in practice, a flange connection is preferable. The powder tank should be cleaned periodically. When the powder collection tank 10 is filled to more than 2 / 3 of its capacity, powder collection is required; otherwise, large powder particles will enter the filter 3, causing damage to the filter element 4. The lower butterfly valve of the cyclone separator 9 and the upper butterfly valve of the powder collection tank 10 should be closed. The collected powder should be combined with the powder produced by its atomization process and then sieved.

[0031] Preferably, in the above structure, a melting chamber 14 is provided at the lower end of the feeding chamber 13, and a sealable gate valve 15 is provided between the feeding chamber 13 and the melting chamber 14. The lower end of the melting chamber 14 is connected to the upper end of the atomizing chamber 16. Those skilled in the art will understand that, since this structure has two sets of vacuum lines, in order to ensure that the powder enters the vacuum pump group 1 along the vacuum pipe A17 connected to the feeding chamber 13, this structure further provides a sealable gate valve 15 between the feeding chamber 13 and the melting chamber 14. By closing the gate valve 15, the feeding chamber 13 and the melting chamber 14 can be isolated. Since the melting chamber 14 is connected to the atomizing chamber 16, the feeding chamber 13 and the atomizing chamber 16 can also be isolated. Simultaneously, vacuuming of the feeding chamber 13 can be quickly achieved during rod replacement. Specifically, vacuuming of the feeding chamber 13 during rod replacement involves: raising the rod tail into the feeding chamber 13, closing the gate valve 15 between the feeding chamber 13 and the melting chamber 14, opening the door of the feeding chamber 13, removing the rod tail, hanging the new rod on the feeding mechanism, closing the door of the feeding chamber 13, starting the vacuum pump group 1, and opening the evacuation valve A11 to evacuate the feeding chamber 13. The air inside the feeding chamber directly enters the vacuum pump group 1 and is drawn away. When the vacuum degree of the feeding chamber 13 is less than 0.2 Pa, the evacuation valve A11 of the feeding chamber is closed, and the vacuum pump group 1 is turned off.

Claims

1. A vacuum pipeline dust removal structure for an electrode induction melting gas atomization pulverizing furnace, comprising a vacuum pump unit (1), characterized in that: It also includes a cyclone separator (9), a vacuum tube A (17) and a vacuum tube B (2). One end of the vacuum tube A (17) is connected to the feeding chamber (13) and the other end is connected to the inlet of the vacuum pump group (1). A suction valve A (11) is provided on the vacuum tube A (17). One end of the vacuum tube B (2) is connected to the atomization chamber (16) and the other end is connected to the inlet of the cyclone separator (9). A suction valve B (12) is provided on the vacuum tube B (2). A powder collection tank (10) is provided at the lower outlet of the cyclone separator (9) and the upper outlet of the cyclone separator (9) is connected to the inlet of the vacuum pump group (1).

2. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 1, characterized in that: A filter (3) is installed between the upper outlet of the cyclone separator (9) and the inlet of the vacuum pump group (1).

3. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 2, characterized in that: The filter (3) has a removable filter element (4) at the left end inside, and the filter element (4) is made of non-metallic material.

4. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 3, characterized in that: A baffle (5) is provided on the right side of the filter (3). The baffle (5) is detachably fixed to the right end of the filter (3) by a locking member (6). An air inlet pipe (7) that can be blocked is provided on the filter (3).

5. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 1, characterized in that: The cyclone separator (9) has a vertically arranged cyclone tube (8) inside.

6. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 5, characterized in that: The bottom of the cyclone separator (8) is located below the inlet of the cyclone separator (9).

7. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 5, characterized in that: The inner diameter of the cyclone tube (8) is 1 / 3 to 1 / 2 of the inner diameter of the cyclone separator (9).

8. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 1, characterized in that: The bottom of the cyclone separator (9) and the top of the powder collection tank (10) are equipped with butterfly valves.

9. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 1, characterized in that: The powder collection tank (10) is detachably connected to the cyclone separator (9).

10. The dust removal structure for a vacuum pipeline of an electrode induction melting gas atomization pulverizing furnace according to claim 1, characterized in that: The lower end of the feeding chamber (13) is provided with a melting chamber (14), and a pluggable gate valve (15) is provided between the feeding chamber (13) and the melting chamber (14). The lower end of the melting chamber (14) is connected to the upper end of the atomizing chamber (16).

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