Mechanical continuous stirring structure for vacuum melting furnace

Abstract

The invention discloses a mechanical continuous stirring structure for a vacuum melting furnace, and belongs to the field of vacuum melting furnaces, the mechanical continuous stirring structure comprises a furnace body, one side of the furnace body is provided with a gear motor, an output shaft of the gear motor is connected with a vertical transmission shaft, and the upper end of the vertical transmission shaft is fixedly connected with a first cross rod; a fixing sleeve is arranged below the first cross rod, the vertical transmission shaft is sleeved with the fixing sleeve, the lower portion of the fixing sleeve is fixed to a shell of the gear motor, and a second cross rod is fixed to the upper portion of the fixing sleeve; one end of the first cross rod is connected with the vertical transmission shaft, the other end of the first cross rod is hinged with a third cross rod, one end of the third cross rod is hinged with the first cross rod, the other end of the third cross rod is fixedly connected with a vertical stirring rod, and the vertical stirring rod extends into the furnace body; one end of the fourth cross rod is hinged to the end of the second cross rod, and the other end of the fourth cross rod is hinged to the middle of the third cross rod. According to the structure, the stirring effect of molten iron in the smelting furnace can be guaranteed, and the dumping action of the smelting furnace is not affected.

Description

Technical Field

[0001] The present invention relates to the field of vacuum melting furnaces, and particularly to a mechanical continuous stirring structure for a vacuum melting furnace. Background Art

[0002] At present, the stirring method of vacuum melting furnaces is mostly realized directly through electromagnetic stirring phenomenon. However, the stirring force of the above-mentioned stirring method is limited, which is not conducive to the homogenization of components. Therefore, in order to improve the stirring effect, some enterprises currently adopt the method of manually operating the stirring rod. Since in order not to affect the tilting action of the melting furnace, the stirring rod currently needs to be able to have a lifting function, the purpose of which is to ensure that when the melting furnace is tilted, the stirring rod can be disengaged from the melting furnace. However, this results in a very high space being reserved above the melting furnace for the entire stirring rod, and the length of the stirring rod is very long, resulting in a large labor intensity during manual operation. And since the operating rod needs to penetrate the upper vacuum cavity, there will be a movable seal here, which is not conducive to maintaining the vacuum degree after long-term operation and is prone to leakage.

[0003] In view of the above problems, the present invention designs and manufactures a mechanical continuous stirring structure for a vacuum melting furnace to overcome the above defects. Summary of the Invention

[0004] For the problems existing in the prior art, a mechanical continuous stirring structure for a vacuum melting furnace provided by the present invention can ensure the stirring effect of the molten iron in the melting furnace, and does not affect the tilting action of the melting furnace, nor will there be a risk of vacuum air leakage.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A mechanical continuous stirring structure for a vacuum melting furnace, including a furnace body, a speed reduction motor is provided on one side of the furnace body, the output shaft of the speed reduction motor is connected to a vertical transmission shaft, and a first cross bar is fixedly connected to the upper end of the vertical transmission shaft; A fixed sleeve is provided below the first cross bar, the fixed sleeve is sleeved on the vertical transmission shaft, the lower part of the fixed sleeve is fixed on the outer shell of the speed reduction motor, and a second cross bar is fixed above the fixed sleeve; One end of the first cross bar is connected to the vertical transmission shaft, the other end of the first cross bar is hinged to a third cross bar, one end of the third cross bar is hinged to the first cross bar, and the other end of the third cross bar is fixedly connected to a vertical stirring rod, and the vertical stirring rod extends into the furnace body; It further includes a fourth cross bar, one end of the fourth cross bar is hinged to the end of the second cross bar, and the other end of the fourth cross bar is hinged to the middle position of the third cross bar.

[0006] Preferably, the length of the fourth cross bar is greater than the length of the first cross bar.

[0007] Preferably, the speed reduction motor is arranged at a position far from the tilting port of the furnace body.

[0008] Preferably, the reduction motor is connected to a lifting drive device, which is connected to the side wall of the furnace body. The lifting drive device can drive the reduction motor and the structures on the reduction motor to perform lifting movements.

[0009] Preferably, the lifting drive device includes a vertical base fixed to the side wall of the furnace body. There are two vertical sliding rails on the vertical base. At least two sliders are provided on the side wall of the reduction motor and are respectively slidably matched with the vertical sliding rails; It further includes a lead screw. One end of the lead screw is provided with a lifting drive motor. A lead screw nut is fixedly connected to the side wall of the reduction motor, and the lead screw nut is screwed with the lead screw.

[0010] Preferably, limit plates are provided at both ends of the vertical sliding rail, and the limit plates can limit the lifting height of the reduction motor.

[0011] Preferably, a boss is provided on the vertical stirring rod. When the vertical stirring rod stirs the molten iron in the stirring furnace body, the boss is located below the molten iron liquid level.

[0012] Preferably, it further includes a bottom bracket. The furnace body can be placed on the bottom bracket. A vertical bracket is provided on one side of the bottom bracket, and two bearing seats are provided at both ends of the top of the vertical bracket; A connecting frame is connected to the side of the furnace body close to the vertical bracket. A rotating shaft is provided on the connecting frame, and the rotating shaft is rotatably connected to the bearing seat; It further includes a furnace body tilting drive mechanism, which can drive the furnace body to perform a tilting action through the rotating shaft.

[0013] The advantages of this invention are as follows: 1. This invention utilizes four connecting rods and, with the help of a reduction motor on one side of the furnace body, realizes the stable stirring of the vertical stirring rod without the need to reserve a large amount of space above the melting furnace.

[0014] 2. This invention fixes the second cross bar to the outer shell of the reduction motor through a fixed sleeve, which can not only lift along with the reduction motor but also ensure the relative movement support of other cross bars.

[0015] 3. This invention realizes the action of large - range stirring only through four cross bars, and has a simple and stable structure, which is safe and reliable.

[0016] 4. The overall structure of this invention occupies a small space and can easily realize the vacuum melting operation with the help of the outer shell.

[0017] 5. The structure for realizing stirring in this invention can perform a tilting action along with the furnace body without affecting the tilting operation, and the operation is more simple and convenient.

[0018] 6. The lifting drive device of the present invention can drive the reduction motor to lift, and then drive the vertical stirring rod to lift through four cross bars, stirring the molten iron at different heights in the smelting furnace, fully ensuring the uniformity of stirring.

[0019] 7. Since there is often molten slag suspended above the molten iron during the smelting process, the liftable manner of the vertical stirring rod of the present invention combined with the convex platform can extract the molten slag, reducing the influence of the molten slag on the molten iron material.

[0020] 8. Since the overall structure of the present invention can be arranged inside the vacuum cavity without a dynamic seal penetrating the cavity, the risk of vacuum leakage is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a mechanical continuous stirring structure for a vacuum smelting furnace; Figure 2 is an axonometric view of a mechanical continuous stirring structure for a vacuum smelting furnace; Figure 3 is a schematic view of the lifting drive device of the present invention; Figure 4 is a top view of the present invention.

[0022] In the figure: 1, furnace body; 2, reduction motor; 3, fixed sleeve; 4, second cross bar; 5, first cross bar; 6, third cross bar; 7, fourth cross bar; 8, vertical stirring rod; 9, vertical base; 10, vertical slide rail; 11, lead screw; 12, lifting drive motor; 13, bottom bracket; 14, vertical bracket; 15, vertical transmission shaft; 16, lead screw nut. DETAILED DESCRIPTION OF THE INVENTION

[0023] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0024] As Figures 1 to 4 shown, a mechanical continuous stirring structure for a vacuum smelting furnace includes a furnace body 1, and a reduction motor 2 is provided on one side of the furnace body 1 as the power output for stirring. The reduction motor 2 is arranged at a position far from the pouring port of the furnace body 1, and the output shaft of the reduction motor 2 is connected to a vertical transmission shaft 15. The upper end of the vertical transmission shaft 15 is fixedly connected to a first cross bar 5.

[0025] A fixed sleeve 3 is provided below the first cross bar 5. The fixed sleeve 3 is sleeved on the vertical transmission shaft 15, and the lower part of the fixed sleeve 3 is fixed on the outer shell of the reduction motor 2. A second cross bar 4 is fixed above the fixed sleeve 3. At this time, the second cross bar 4 is integrally arranged with the reduction motor 2, and the first cross bar 5 will swing above the second cross bar 4.

[0026] Specifically, one end of the first cross bar 5 is connected to the vertical transmission shaft 15, and the other end of the first cross bar 5 is hinged with a third cross bar 6. One end of the third cross bar 6 is hinged with the first cross bar 5, and the other end of the third cross bar 6 is fixedly connected with a vertical stirring rod 8, and the vertical stirring rod 8 extends into the furnace body 1. It further includes a fourth cross bar 7. One end of the fourth cross bar 7 is hinged with the end of the second cross bar 4, and the other end of the fourth cross bar 7 is hinged with the middle position of the third cross bar 6. Of course, the middle position of the third cross bar 6 here is not an absolute middle position, as long as it is ensured that under the drive of the first cross bar 5, the vertical stirring rod 8 at the end of the third cross bar 6 can stir in the furnace body 1 when swinging with the fourth cross bar 7 as the reference.

[0027] The above structure utilizes four connecting rods, and with the reduction motor 2 on one side of the furnace body 1, it realizes the stable stirring of the vertical stirring rod 8, without the need to reserve a large amount of space above the smelting furnace. Moreover, only through four cross bars, the action of large-range stirring is realized. In addition, the structure is simple and stable, safe and reliable. The overall structure occupies a small space and can easily realize the vacuum smelting operation with the help of the outer shell.

[0028] In the present invention, the end of the second cross bar 4 is close to the furnace body 1, and the length of the fourth cross bar 7 is greater than that of the first cross bar 5. By driving the swing of the third cross bar 6 with the small-radius swing of the first cross bar 5, the occupied space is reduced as much as possible.

[0029] In the present invention, the reduction motor 2 is connected with a lifting drive device, and the lifting drive device is connected to the side wall of the furnace body 1. The lifting drive device can drive the reduction motor 2 and the structure on the reduction motor 2 to perform lifting motion.

[0030] The lifting drive device specifically includes a vertical base 9, which is fixed on the side wall of the furnace body 1. There are two vertical slide rails 10 on the vertical base 9. At least two sliders are provided on the side wall of the reduction motor 2 and are respectively slidably matched with the vertical slide rails 10. It further includes a lead screw 11. One end of the lead screw 11 is provided with a lifting drive motor 12. A lead screw nut 16 is fixedly connected to the side wall of the reduction motor 2, and the lead screw nut 16 is screwed with the lead screw 11.

[0031] Preferably, limit plates are provided at both ends of the vertical slide rail 10, and the limit plates can limit the lifting height of the reduction motor 2.

[0032] The above structure makes full use of the structure that the second cross bar 4 is fixed on the outer shell of the reduction motor 2 through the fixing sleeve 3. It can not only lift along with the reduction motor 2, but also ensure the relative movement support of other cross bars.

[0033] In the present invention, a convex platform is provided on the vertical stirring rod 8. When the vertical stirring rod 8 stirs the molten iron in the furnace body 1, the convex platform is located below the molten iron liquid level. Since there is often molten slag suspended above the molten iron during the smelting process, the liftable manner of the vertical stirring rod 8 of the present invention combined with the convex platform can extract the molten slag and reduce the influence of the molten slag on the molten iron material.

[0034] The present invention further includes a bottom bracket 13 on which the furnace body 1 can be placed. A vertical bracket 14 is provided on one side of the bottom bracket 13. Two bearing seats are provided at both ends of the top of the vertical bracket 14. A connecting frame is connected to the side of the furnace body 1 close to the vertical bracket 14. A rotating shaft is provided on the connecting frame, and the rotating shaft is rotatably connected to the bearing seat. It further includes a tilting drive mechanism for the furnace body 1, and the tilting drive mechanism for the furnace body 1 can drive the furnace body 1 to perform a tilting action through the rotating shaft.

[0035] The structure for realizing stirring can perform a tilting action along with the furnace body 1 without affecting the tilting operation, and is more simple and convenient to operate compared with the traditional stirring structure.

[0036] It should be understood that the use of these embodiments is only for illustrating the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A mechanical continuous stirring structure for a vacuum melting furnace, characterized in that It includes a furnace body (1). A reduction motor (2) is provided on one side of the furnace body (1). The output shaft of the reduction motor (2) is connected to a vertical transmission shaft (15). The upper end of the vertical transmission shaft (15) is fixedly connected to a first cross bar (5). Below the first cross bar (5) is a fixed sleeve (3). The fixed sleeve (3) is sleeved on the vertical transmission shaft (15). The lower part of the fixed sleeve (3) is fixed on the outer shell of the reduction motor (2). Above the fixed sleeve (3) is fixed a second cross bar (4). One end of the first cross bar (5) is connected to the vertical transmission shaft (15). The other end of the first cross bar (5) is hinged to a third cross bar (6). One end of the third cross bar (6) is hinged to the first cross bar (5). The other end of the third cross bar (6) is fixedly connected to a vertical stirring rod (8). The vertical stirring rod (8) extends into the furnace body (1). It also includes a fourth cross bar (7). One end of the fourth cross bar (7) is hinged to the end of the second cross bar (4). The other end of the fourth cross bar (7) is hinged to the middle position of the third cross bar (6).

2. The mechanical continuous stirring structure for a vacuum melting furnace according to claim 1, characterized in that, The length of the fourth cross bar (7) is greater than the length of the first cross bar (5).

3. The mechanical continuous stirring structure for a vacuum melting furnace according to claim 1, characterized in that, The reduction motor (2) is arranged at a position far from the tipping opening of the furnace body (1).

4. A mechanical continuous stirring structure for a vacuum melting furnace according to claim 1, characterized in that, The reduction motor (2) is connected to a lifting drive device. The lifting drive device is connected to the side wall of the furnace body (1). The lifting drive device can drive the reduction motor (2) and the structures on the reduction motor (2) to perform lifting movements.

5. A mechanical continuous stirring structure for a vacuum melting furnace according to claim 4, characterized in that, The lifting drive device includes a vertical base (9). The vertical base (9) is fixed on the side wall of the furnace body (1). There are two vertical slide rails (10) on the vertical base (9). At least two sliders are provided on the side wall of the reduction motor (2) and are respectively in sliding fit with the vertical slide rails (10). It also includes a lead screw (11). One end of the lead screw (11) is provided with a lifting drive motor (12). A lead screw nut (16) is fixedly connected to the side wall of the reduction motor (2). The lead screw nut (16) is screwed to the lead screw (11).

6. The mechanical continuous stirring structure for a vacuum melting furnace according to claim 5, characterized in that, Limit plates are provided at both ends of the vertical slide rail (10). The limit plates can limit the lifting height of the reduction motor (2).

7. A mechanical continuous stirring structure for a vacuum melting furnace according to claim 1, characterized in that, There is a convex platform on the vertical stirring rod (8). When the vertical stirring rod (8) stirs the molten iron in the furnace body (1), the convex platform is located below the liquid level of the molten iron.

8. A mechanical continuous stirring structure for a vacuum melting furnace according to claim 1, characterized in that, It also includes a bottom bracket (13). The furnace body (1) can be placed on the bottom bracket (13). On one side of the bottom bracket (13) is a vertical bracket (14). There are two bearing seats at both ends of the top of the vertical bracket (14). One side of the furnace body (1) close to the vertical bracket (14) is connected with a connecting frame. A rotating shaft is provided on the connecting frame. The rotating shaft is rotatably connected to the bearing seat. It also includes a tilting drive mechanism of the furnace body (1). The tilting drive mechanism of the furnace body (1) can drive the furnace body (1) to perform a tilting action through the rotating shaft.

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