Feeding structure of vacuum melting furnace

Abstract

The utility model relates to a vacuum melting furnace feeding structure which comprises a furnace body and a base, a feeding cylinder is arranged on the base, a plurality of material distribution grids are annularly distributed in the feeding cylinder along the axis, an annular groove is formed in the inner side wall of the feeding cylinder, a rotating disc is slidably connected into the annular groove, and a discharging opening with the same size and shape as one material distribution grid is formed in the rotating disc. A material mixing chamber is defined by the rotating disc and the side face of the feeding cylinder, a discharging opening is formed in the bottom face of the material mixing chamber, a discharging pipe communicated with the furnace body is arranged below the discharging opening, and an operator can drive the rotating disc to rotate, so that different metal raw materials stored in the material dividing grids can sequentially fall into the material mixing chamber and finally fall into a crucible through the discharging pipe. And the charging barrel does not need to be frequently opened for charging in the whole process. The feeding device has the effect of improving the feeding efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum melting furnaces, and in particular to a feeding structure of a vacuum melting furnace. Background Art

[0002] A vacuum melting furnace is a device that melts metals in a vacuum environment. It heats the metal material to above the melting point and performs melting, alloying and refining processes in a vacuum state to obtain high-quality metal materials and alloys. Vacuum melting furnaces are widely used in metallurgy, aerospace, electronics, chemical industry and other fields, and are one of the indispensable and important equipment in modern industry.

[0003] In some alloy smelting processes, different alloy elements or multiple different alloy elements need to be added at different temperatures and time periods. However, the current vacuum melting furnace feeding devices mostly use a feeding barrel, which can only add a single metal raw material or a mixture of multiple metal raw materials at a time. When different metal raw materials need to be added, the feeding barrel needs to be opened frequently, and the feeding efficiency is low. Utility Model Content

[0004] In order to improve the feeding efficiency, the present application provides a feeding structure for a vacuum melting furnace.

[0005] A vacuum melting furnace feeding structure provided in this application adopts the following technical solution:

[0006] A feeding structure of a vacuum melting furnace comprises a furnace body and a base, wherein the base is arranged on the top surface of the furnace body, a crucible is arranged in the furnace body, a feeding barrel is arranged on the base, a plurality of material distribution grids are distributed in an annular manner along the axis in the feeding barrel, an annular groove is provided on the inner side wall of the feeding barrel, a turntable is slidably connected in the annular groove, a feeding port is provided on the turntable, the turntable and the side surface of the feeding barrel form a mixing chamber, a discharging port is provided on the bottom surface of the mixing chamber, a discharging port is provided under the discharging port and a discharging pipe connected to the furnace body is provided below the discharging port, and the discharging direction of the discharging pipe is arranged toward the crucible.

[0007] By adopting the above technical solution, during the initial feeding, the operator adds different metal raw materials into different material distribution grids respectively. By driving the turntable to rotate, the different metal raw materials stored in the material distribution grids can be sequentially dropped into the mixing chamber, and finally dropped into the crucible through the discharge pipe. The whole process does not require frequent opening of the feeding barrel for feeding, thereby improving the feeding efficiency.

[0008] Optionally, a driving assembly for driving the turntable to rotate is provided on the feeding barrel, and a cavity is formed between the multiple material distribution grids. The driving assembly includes a motor arranged on the feeding barrel, and the output shaft of the motor passes through the cavity and is fixedly connected to the turntable, and the cavity is rotationally connected to the motor output shaft.

[0009] By adopting the above technical solution, the motor drives the turntable to rotate in the feeding barrel when it is in working state. When the discharge port of the turntable moves to different material distribution grids, the metals stored in the material distribution grids fall into the mixing chamber in sequence. Compared with the operator manually driving the turntable to rotate, the motor drive can make the turntable rotate faster, further improving the feeding efficiency, while also reducing the operator's workload.

[0010] Optionally, a stirring shaft is rotatably connected in the mixing chamber, the stirring shaft is connected to an output shaft of the motor, and a plurality of stirring blades are provided on the stirring shaft.

[0011] By adopting the above technical solution, when different metal raw materials are added into the mixing chamber, the stirring shaft rotates under the drive of the motor, and the setting of the stirring blades can speed up the mixing speed of different metal raw materials, further improving the feeding efficiency. At the same time, the uniformity of the metal mixed raw materials is improved, and the quality of the alloy subsequently smelted is higher.

[0012] Optionally, a sealing groove is provided on the base, a sealing component for sealing the discharge port is provided in the sealing groove, a vacuum pump is provided on the base, a suction end of the vacuum pump is connected to the mixing chamber, and a vacuum tester for detecting the vacuum degree in the mixing chamber is provided on the outer wall of the mixing chamber.

[0013] By adopting the above technical scheme, the setting of the sealing component can ensure the sealing of the mixing chamber and the furnace body, the setting of the vacuum tester can allow the operator to intuitively observe the vacuum degree in the mixing chamber, and the setting of the vacuum pump can ensure the vacuum degree inside the mixing chamber, thereby reducing the occurrence of the situation where air enters the furnace body and affects the smelting process when the feed port is opened.

[0014] Optionally, the sealing assembly includes a bidirectional screw rod rotatably arranged in the sealing groove, and sealing plates are threadedly connected to the two sections of the rod with opposite spiral rotation directions of the bidirectional screw rod. The sealing plate is arranged below the discharge port, and the side wall of the sealing plate is slidably matched with the side wall of the sealing groove. When the stirring shaft rotates, the sealing plate blocks the discharge port, and a driving member for driving the bidirectional screw rod to rotate is provided on the base.

[0015] The two sections of the bidirectional screw with opposite spiral rotation directions are both threadedly connected with blocking plates, the side walls of the blocking plates are slidably matched with the side walls of the blocking groove, and the base is provided with a driving member for driving the bidirectional screw to rotate.

[0016] By adopting the above technical solution, the operator can control the opening and closing of the feed port by the forward and reverse rotation of the driving member, thereby ensuring the vacuum level inside the mixing chamber and the furnace body. At the same time, the opening degree of the feed port can be controlled by the sealing plate, thereby controlling the feeding speed of the metal raw material and reducing the probability of splashing of the metal solution inside the crucible due to excessive feeding.

[0017] Optionally, a receiving groove is provided on the base, and sliding grooves are provided on the side walls opposite to the receiving groove. The discharge pipe is slidably arranged in the receiving groove, and an electric push rod is provided in the sliding groove. The output shaft of the electric push rod is provided with a connecting block, one end of the connecting block is slidably matched with the sliding groove, and the other end of the connecting block is connected to the side wall of the discharge pipe, and a spiral feeding plate is fixedly connected to the discharge pipe.

[0018] By adopting the above technical solution, the setting of the electric push rod can realize the lifting and lowering of the discharge pipe inside the containing tank, thereby changing the distance between the discharge point of the discharge pipe and the opening of the crucible, further reducing the probability of metal liquid splashing during the feeding process, reducing the raw material loss caused during the feeding process, thereby reducing the number of times that metal raw materials need to be added, and further improving the feeding efficiency.

[0019] Optionally, a sealing strip is provided at the connection between the turntable and the feeding barrel, and the sealing strip is arranged in a ring shape.

[0020] By adopting the above technical solution, the setting of the sealing strip can form the annular groove into a sealing area, reducing the possibility of metal raw materials entering the annular groove area along the gap during the rotation of the turntable, while improving the rotation stability of the turntable and reducing the loss of metal raw materials.

[0021] Optionally, a plurality of visual windows corresponding one-to-one to the material dividing grids are provided on the outer side wall of the feeding barrel.

[0022] By adopting the above technical solution, the setting of the visual window allows the operator to intuitively observe the storage amount of the metal raw material in the feeding barrel, which is convenient for the operator to replenish the raw material to the feeding barrel in time.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. In the embodiment of the present application, a material dividing grid and a turntable are provided. The material dividing grid can store different metal raw materials. When it is necessary to add metal raw materials again during the smelting process, the operator rotates the turntable. When the feed opening of the turntable moves to different material dividing grids, the metals stored in the material dividing grids fall into the mixing chamber in sequence and finally fall into the crucible. The whole process does not require frequent opening of the feeding barrel for feeding, thereby improving the feeding efficiency.

[0025] 2. The embodiment of the present application provides a sealing component, which can ensure the sealing of the mixing chamber and the furnace body, reduce the occurrence of the situation where the air enters the furnace body and affects the smelting process when the feed port is opened, and also can control the opening degree of the feed port through the sealing plate, thereby controlling the feeding speed of the metal raw material, reducing the probability of splashing of the metal solution inside the crucible due to excessive feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of this application.

[0027] Figure 2 It is a cross-sectional view of the feeding cylinder, base and furnace body in the embodiment of the present application.

[0028] Figure 3 It is an exploded view between the material distribution grid and the turntable in the embodiment of the present application.

[0029] Figure 4 It is a cross-sectional view of the blocking component in the embodiment of the present application.

[0030] Explanation of the reference numerals: 1. furnace body; 101. crucible; 2. base; 3. feeding barrel; 31. material cover; 32. visual window; 33. vacuum pump; 34. vacuum tester; 35. annular groove; 4. material dividing grid; 41. cavity; 5. turntable; 51. discharge port; 52. sealing strip; 6. motor; 7. mixing chamber; 71. discharge port; 72. stirring shaft; 73. stirring blade; 8. blocking groove; 9. blocking assembly; 91. bidirectional screw rod; 92. guide rod; 93. blocking plate; 10. driving member; 11. receiving groove; 12. sliding groove; 13. discharge pipe; 131. spiral feed plate; 14. electric push rod; 141. connecting block. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a feeding structure for a vacuum melting furnace.

[0033] Reference Figure 1 A feeding structure of a vacuum melting furnace comprises a furnace body 1 and a base 2. The furnace body 1 is fixedly mounted with the base 2, and a feeding barrel 3 is fixedly mounted on the base 2. A plurality of material covers 31 are hinged on the top surface of the feeding barrel 3. An operator can add different metal raw materials into the feeding barrel 3 after opening the feeding covers 31. A plurality of visual windows 32 are installed on the outer wall of the feeding barrel 3. An operator can visually observe the storage amount of metal raw materials in the feeding barrel 3 through the visual windows 32, so that the operator can replenish the raw materials to the feeding barrel 3 in time;

[0034] A vacuum pump 33 is installed on the outer wall of the base 2, and the suction end of the vacuum pump 33 is connected to the mixing chamber 7. A vacuum tester 34 for detecting the vacuum degree in the mixing chamber 7 is installed on the outer wall of the feeding tube 3. When the operator observes that the vacuum degree in the mixing chamber 7 changes through the vacuum tester 34, the vacuum degree inside the mixing chamber 7 can be ensured by starting the vacuum pump 33.

[0035] Reference Figure 2 and Figure 3 , a crucible 101 is arranged under the discharging direction of the feeding barrel 3, and the crucible 101 is installed inside the furnace body 1. A plurality of material dividing grids 4 are distributed in an annular manner along the axis inside the feeding barrel 3, and the plurality of material dividing grids 4 correspond to the plurality of material covers 31 one by one. The operator opens the feeding cover 31 and adds different metal raw materials to different material dividing grids 4 respectively. An annular groove 35 is provided on the inner side wall of the feeding barrel 3, and a turntable 5 is slidably connected in the annular groove 35. The turntable 5 is rotatably arranged below the material dividing grid 4, and a discharge port 51 of the same size and shape as one of the material dividing grids 4 is provided on the turntable 5. A cavity 41 is formed between the plurality of material dividing grids 4, and a motor 6 is fixedly installed at the center position of the sealing plate, and the output shaft of the motor 6 is inserted into the sealing plate and passes through the cavity 41 and is fixedly connected to the center of the turntable 5, and the output shaft of the motor 6 is rotatably connected to the cavity 41, and a sealing strip 52 is installed on the upper surface and the lower surface of the turntable 5, and the sealing strip 52 is arranged in an annular shape at the connection between the turntable 5 and the side wall of the feeding barrel;

[0036] During the alloy smelting process, different metal raw materials or mixed metal raw materials need to be added at different smelting stages. At this time, the operator drives the motor 6 to rotate, and the motor 6 drives the turntable 5 to rotate. During the rotation of the turntable 5, the feed port 51 will move along the annular groove 35 in the feed barrel. When the feed port 51 of the turntable 5 moves to different material distribution grids 4, the metals stored in the material distribution grids 4 fall into the mixing chamber 7 in turn, and finally fall into the crucible 101. The whole process does not require frequent opening of the feed barrel 3 for feeding, which improves the feeding efficiency. At the same time, the setting of the sealing strip 52 can form a sealing area of ​​the annular groove 35, which reduces the possibility of metal raw materials entering the annular groove 35 area along the gap during the rotation of the turntable 5, thereby improving the rotation stability of the turntable 5 and reducing the loss of metal raw materials.

[0037] Reference Figure 2 , Figure 3 The bottom surface of the turntable 5 and the side wall of the feeding barrel 3 define a mixing chamber 7, which is used for mixing different metal raw materials. The mixing chamber 7 is funnel-shaped as a whole, and a discharge port 71 is provided on the bottom surface of the mixing chamber 7. A stirring shaft 72 is rotatably connected in the mixing chamber 7, and the stirring shaft 72 is connected to the output shaft of the motor 6. A plurality of stirring blades 73 are fixedly mounted on the stirring shaft 72;

[0038] When different metal raw materials enter the mixing chamber 7, the start of the motor 6 drives the stirring shaft 72 to rotate, thereby accelerating the mixing speed of the different metal raw materials in the mixing chamber 7, further improving the feeding efficiency, and at the same time improving the uniformity of the metal mixed raw materials, and the quality of the alloy subsequently smelted is higher.

[0039] Reference Figure 2 , Figure 3 and Figure 4 A sealing groove 8 is provided on the base 2, and the sealing groove 8 is located below the discharge port 71. A sealing component 9 for sealing the discharge port 71 is arranged in the sealing groove 8. The sealing component 9 includes a bidirectional screw rod 91 rotatably connected to the sealing groove 8, and one end of the sealing groove 8 away from the bidirectional screw rod 91 is fixedly connected to a guide rod 92, and two sealing plates 93 are commonly connected between the bidirectional screw rod 91 and the guide rod 92. The two sealing plates 93 are respectively threadedly connected to the two end rods of the bidirectional screw rod 91 with opposite spiral rotation directions, and the two sealing plates 93 are slidably connected to the guide rod 92. A driving member 10 for driving the bidirectional screw rod 91 to rotate is installed on the outer wall of the base 2. In this embodiment, the driving member 10 is a motor 6, and a vacuum pump 33 is installed on the outer wall of the base 2.

[0040] The vacuum melting furnace needs to ensure the vacuum degree inside the furnace body 1 during the melting process. When the furnace body 1 is melting, the operator rotates the bidirectional screw 91 through the driving part 10. During the rotation of the bidirectional screw 91, the two sealing plates 93 move in opposite directions, and the discharge port 71 is blocked, thereby ensuring the vacuum degree inside the furnace body 1. After the metal raw materials are mixed in the mixing chamber 7, the operator rotates the bidirectional screw 91 in the opposite direction through the driving part 10, and the two sealing plates 93 move in opposite directions. The discharge port 71 opens, and the metal raw materials enter the crucible 101 for melting.

[0041] Reference Figure 3 and Figure 4 A receiving groove 11 is provided on the base 2, and the receiving groove 11 is arranged below the blocking groove 8. Sliding grooves 12 are provided on the opposite side walls of the receiving groove 11, and a discharge pipe 13 is slidably provided in the sliding groove 12. Electric push rods 14 are fixedly connected to the bottom surfaces of the two sliding grooves 12, and the output shafts of the electric push rods 14 are fixedly connected to connecting blocks 141. The two connecting blocks 141 are respectively connected to the opposite outer side walls of the discharge pipe 13, and a spiral feeding plate 131 is fixedly connected in the discharge pipe 13, and the outlet of the spiral feeding plate 131 faces the crucible 101.

[0042] Before the discharge port 71 is opened, the operator can adjust the distance between the discharge position of the discharge pipe 13 and the opening of the crucible 101 according to the height of the metal liquid level in the crucible 101. When the electric push rod 14 pushes the connecting block 141 to move upward on the side wall of the sliding groove 12, the distance between the discharge pipe 13 and the crucible 101 increases. When the electric push rod 14 drives the connecting block 141 to move downward on the side wall of the sliding groove 12, the distance between the discharge pipe 13 and the crucible 101 decreases. The setting of the electric push rod 14 can maintain an appropriate distance between the discharge pipe 13 and the crucible 101, reducing the probability of splashing of the metal solution in the crucible 101 during the unloading process, thereby reducing the raw material loss caused during the feeding process, and then reducing the number of times that metal raw materials need to be added, thereby improving the feeding efficiency. At the same time, the setting of the spiral discharge plate slows down the unloading speed of the metal raw materials, thereby further reducing the possibility of splashing.

[0043] The implementation principle of a feeding structure of a vacuum melting furnace in an embodiment of the present application is as follows: after the operator opens the material cover 31, he / she puts different metals into different material distribution grids 4 separately, and then closes the material cover 31. When different metal raw materials need to be added during the smelting process, the operator starts the motor 6, and the motor 6 drives the turntable 5 to rotate. When the discharge port 51 of the turntable 5 moves to different material distribution grids 4, the metals stored in the material distribution grids 4 fall into the mixing chamber 7 in sequence. Driven by the motor 6, the stirring shaft 72 drives the stirring blades 73 to stir and mix the unused metal raw materials. After the metal raw materials are stirred and mixed, the operator starts the driving member 10. Driven by the driving member 10, the two sealing plates 93 move in opposite directions, the feeding port is opened, and the metal raw materials fall into the discharge pipe, and finally fall into the crucible 101 along the spiral feeding plate 131 in the discharge pipe. The feeding during the entire smelting process does not require the operator to frequently open the feeding barrel 3 for feeding, thereby improving the feeding efficiency.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A feeding structure for a vacuum melting furnace, comprising a furnace body (1) and a base (2), wherein the base (2) is arranged on the top surface of the furnace body (1), and a crucible (101) is arranged in the furnace body (1), characterized in that: The base (2) is provided with a feeding barrel (3), and a plurality of material distribution grids (4) are distributed in an annular manner along the axis in the feeding barrel (3). The inner side wall of the feeding barrel (3) is provided with an annular groove (35), and a turntable (5) is slidably connected in the annular groove (35). The turntable (5) is provided with a discharge port (51), and the turntable (5) and the side surface of the feeding barrel (3) enclose a mixing chamber (7). The bottom surface of the mixing chamber (7) is provided with a discharge port (71), and a discharge pipe (13) connected to the furnace body (1) is provided below the discharge port (71), and the discharge direction of the discharge pipe (13) is arranged toward the crucible (101).

2. A vacuum melting furnace feeding structure according to claim 1, characterized in that: The feeding barrel (3) is provided with a driving assembly for driving the turntable (5) to rotate, and a cavity (41) is formed between the plurality of material distribution grids (4). The driving assembly includes a motor (6) arranged on the feeding barrel (3), and the output shaft of the motor (6) passes through the cavity (41) and is fixedly connected to the turntable (5), and the cavity (41) is rotationally connected to the output shaft of the motor (6).

3. A vacuum melting furnace feeding structure according to claim 2, characterized in that: A stirring shaft (72) is rotatably connected in the mixing chamber (7), the stirring shaft (72) is connected to the output shaft of the motor (6), and a plurality of stirring blades (73) are provided on the stirring shaft (72).

4. A vacuum melting furnace feeding structure according to claim 3, characterized in that: The base (2) is provided with a blocking groove (8), and a blocking component (9) for blocking the discharge port (71) is provided in the blocking groove (8). The base (2) is provided with a vacuum pump (33), and the suction end of the vacuum pump (33) is connected to the mixing chamber (7). The outer wall of the mixing chamber (7) is provided with a vacuum tester (34) for detecting the vacuum degree in the mixing chamber (7).

5. A vacuum melting furnace feeding structure according to claim 4, characterized in that: The blocking assembly (9) comprises a bidirectional screw rod (91) rotatably arranged in the blocking groove (8), and two sections of the bidirectional screw rod (91) with opposite spiral rotation directions are both threadedly connected with a blocking plate (93), and the blocking plate (93) is arranged below the discharge port (71), and the side wall of the blocking plate (93) is slidably matched with the side wall of the blocking groove (8), and when the stirring shaft (72) rotates, the blocking plate (93) blocks the discharge port (71), and the base (2) is provided with a driving member (10) for driving the bidirectional screw rod (91) to rotate.

6. A vacuum melting furnace feeding structure according to claim 1, characterized in that: The base (2) is provided with a receiving groove (11), and the side walls opposite to the receiving groove (11) are provided with sliding grooves (12). The discharge pipe (13) is slidably arranged in the receiving groove (11), and the sliding groove (12) is provided with an electric push rod (14). The output shaft of the electric push rod (14) is provided with a connecting block (141), one end of the connecting block (141) is slidably matched with the sliding groove (12), and the other end of the connecting block (141) is connected to the side wall of the discharge pipe (13), and a spiral feeding plate (131) is fixedly connected to the discharge pipe (13).

7. A vacuum melting furnace feeding structure according to claim 1, characterized in that: A sealing strip (52) is provided at the connection between the rotating disk (5) and the feeding cylinder (3), and the sealing strip (52) is arranged in a ring shape.

8. A vacuum melting furnace feeding structure according to claim 1, characterized in that: The outer side wall of the feeding cylinder (3) is provided with a plurality of visual windows (32) corresponding one to one with the material dividing grids (4).

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