Composite stirring device for alloy smelting

Abstract

The utility model belongs to the technical field of smelting equipment, and particularly discloses a composite stirring device for alloy smelting. A main guide rod of the feeding unit is fixed to the top face of a base, a screw hole is formed in the top end of the main guide rod, a lead screw extends into the screw hole in a threaded connection mode, a connecting base slidably sleeves the main guide rod, a supporting frame I is vertically fixed to the connecting base, a motor I is fixed to the top end of the supporting frame I, and a driving shaft is connected with the lead screw; a supporting frame II of the stirring unit is vertically fixed to a connecting base, a motor II is fixed to the top end of the supporting frame II, a stirring shaft rotationally penetrates through the connecting base and the supporting frame II, the top end of the stirring shaft is connected with a driving shaft of the motor II, a stirring head is detachably fixed to the stirring shaft, and the lower portion of the stirring head extends into the crucible. The feeding unit is arranged to realize vertical reciprocating motion in the stirring process and control the stirring depth, and the stirring unit is arranged to control the stirring speed, so that the stirring efficiency and the stirring uniformity are improved, and the stirring device has the characteristics of simple structure, simplicity and convenience in operation, high reliability and uniformity in stirring.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting equipment, in particular to a composite stirring device for alloy smelting which has the advantages of simple structure, easy operation, high reliability and uniform stirring. Background Art

[0002] Alloy is a metal material with metallic properties obtained by alloying one metal with another or several metals or non-metals through alloying processes (such as smelting, mechanical alloying, sintering, vapor deposition, etc.). Alloys are usually prepared by smelting process, that is, metal ingots, scrap metals and additives of different elements are added to the smelting furnace, melted and mixed into alloy liquid at high temperature, and then refined, modified, cast and other processes are carried out to finally obtain the required alloy. At present, resistance furnace or medium frequency induction furnace is usually used for smelting. Since the resistance furnace only has the function of melting, it cannot stir the alloy, which makes it difficult for the various alloy phases in the alloy liquid to be fully mixed and diffused, resulting in uneven distribution of alloy components and aggregation of various alloy phases. The quality of the alloy obtained is low. Although the medium frequency induction furnace has electromagnetic stirring, the strength of electromagnetic stirring varies with the power of the furnace. The electromagnetic stirring is relatively weak when the power is small, which leads to the unsatisfactory uniformity of alloy phase distribution. In particular, the phase with a larger specific gravity in the alloy phase often has stratification, which affects the comprehensive performance of the alloy.

[0003] At present, in order to solve the problem of uneven distribution of alloy phases during alloy smelting, a stirring device is generally added to the smelting furnace or one side of the smelting furnace to enhance the mixing effect. However, the existing stirring device is generally bound to the smelting furnace, and the stirring component extends to a fixed depth in the smelting furnace. This not only pollutes the alloy with impurities carried by the fixed stirring component when stirring is not required, but also makes it difficult to clean and maintain the stirring component after smelting. Moreover, since the depth of the stirring component extending into the furnace is fixed, the stirring cannot adapt well to the liquid level height of different alloy smelting amounts, and the mixing effect is not ideal. For this reason, there is also a lifting oil cylinder set on the stirring device in the prior art, so that the height of the stirring component can be adjusted according to the liquid level, and the stirring component can be raised after stirring is not required or after stirring is completed, so as to avoid impurities carried by the stirring component from contaminating the alloy and facilitate cleaning and maintenance of the stirring component. However, due to the insufficient reliability of the oil cylinder in a high temperature environment and the low stroke accuracy of the oil cylinder, the maintenance workload is high and the stirring effect is not ideal during actual application. Of course, there are also structures in the prior art that use a vertically arranged exposed screw and a nut to drive the stirring assembly to rise and fall, but since the screw pair is sensitive to high temperature and dust, its working reliability is also insufficient in harsh smelting environments. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a composite stirring device for alloy smelting which has simple structure, easy operation, high reliability and uniform stirring.

[0005] The utility model is implemented as follows: it comprises a base, a stirring unit, and a feeding unit, wherein rollers I are arranged at the four corners of the bottom surface of the base;

[0006] The feeding unit includes a motor I, a screw rod, a main rod, a connecting seat, and a support frame I. The main rod is vertically fixed on the top surface of the base, the top of the main rod is provided with a screw hole extending downward, the screw rod is threadedly connected and extends into the screw hole of the main rod, the connecting seat is slidably sleeved on the main rod, the support frame I is vertically fixed on the connecting seat and the top extends to the top of the screw rod, the motor I is fixed on the top of the support frame I, and the driving shaft of the motor I is connected to the screw rod;

[0007] The stirring unit includes a motor II, a stirring shaft, a stirring head, and a support frame II. The support frame II is vertically fixed on a connecting seat away from the side of the main rod. The motor II is fixed at the top of the support frame II. The stirring shaft rotates and passes through the connecting seat and the support frame II. The top of the stirring shaft is connected to the driving shaft of the motor II. The top of the stirring head is detachably fixedly connected to the bottom end of the stirring shaft, and the lower part of the stirring head can extend into the crucible for alloy smelting.

[0008] Furthermore, a bracket parallel to the main rod is fixedly provided on the top surface of the base, and travel switches corresponding to the connecting seat are arranged at intervals on the bracket, and the travel switch, motor I and motor II are electrically connected to the control system respectively.

[0009] Furthermore, limit switches are fixedly arranged on the bracket above the upper travel switch and below the lower travel switch, respectively, and the limit switches are electrically connected to the control system.

[0010] Furthermore, the top surface of the base is also fixedly provided with side guide rods parallel to the main rod, and the side guide rods slide through the connecting seat, or the side guide rods are arranged on both sides of the connecting seat and slide against the side surfaces of the connecting seat.

[0011] Furthermore, two longitudinal guide rails parallel to each other are arranged below the base, and rollers I arranged at the four corners of the bottom surface of the base are in rolling cooperation with the longitudinal guide rails.

[0012] Furthermore, two mutually parallel transverse guide rails are arranged below the longitudinal guide rail, the two longitudinal guide rails form a "mouth"-shaped hollow frame and rollers II are arranged at the four corners of the bottom, the rollers II roll in cooperation with the transverse guide rails, and the two transverse guide rails are fixed on the ground or the top surface of the smelting furnace.

[0013] Furthermore, the roller I and roller II are both made of metal, and the roller I at at least one end of the bottom surface of the base and the roller II at at least one end of the bottom of the frame formed by the two longitudinal guide rails are provided with brakes.

[0014] Furthermore, the motor shafts of the motor I and / or the motor II are also connected to reducers I and II respectively, the output shaft of the reducer I is connected to the screw rod, and the output shaft of the reducer II is connected to the stirring shaft.

[0015] Furthermore, a connecting head is fixedly provided at the bottom end of the stirring shaft, and a connecting hole extending upward is provided at the bottom end of the connecting head. The stirring handle of the stirring head can be slidably inserted into the connecting hole, and a fastening screw whose bottom end can be tightened against the stirring handle in the connecting hole is threadedly provided on the side wall of the connecting head.

[0016] Furthermore, the stirring part of the stirring head is a high-purity graphite head of a plate-like structure or a plate-like structure with a plurality of through holes distributed on the surface, and the stirring handle of the stirring head is a stainless steel rod or a titanium alloy rod.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model uses a linked feeding unit and a stirring unit, and adopts motor I to move the stirring unit up and down, and adopts motor II to rotate the stirring head, so that the strength of stirring can be adjusted by controlling the start, stop and speed of motor II, and the speed of up and down movement and the depth of entering the alloy melt can be adjusted by controlling the start, stop and speed of motor I, which can not only improve the stirring efficiency and stirring quality of alloy smelting, but also simplify the operation and control process, and facilitate the cleaning and maintenance of the stirring head. In particular, a bracket parallel to the main rod is set on the base, and a travel switch corresponding to the connecting seat is arranged at intervals on the bracket, and the travel switch, motor I and motor II are electrically connected to the control system respectively; the automatic control of the up and down movement during stirring can be realized through the travel switch and the control system.

[0019] 2. The feed unit of the utility model is provided with a screw hole at the top end of the vertically fixed main rod for threaded connection with the lead screw, and a support frame I is provided on the connecting seat on which the main rod is sleeved to fix the motor I, so that the motor I drives the lead screw to drive the connecting seat to slide along the main rod to realize lifting; since the lead screw is far away from the smelting furnace and is shielded by the main rod and the base, the adverse effects of the high temperature and dust of the smelting furnace on the lead screw pair can be significantly reduced, and the reliability of the lifting structure is effectively improved.

[0020] 3. The utility model is provided with rollers I at the four corners of the bottom surface of the base, so that it can be untied from the smelting furnace to form a movable structure, and can be moved to different smelting furnaces as needed to stir the alloy therein, which not only simplifies the structure of the smelting furnace, but also improves the flexibility of the stirring device, and does not hinder the maintenance of the smelting furnace and the addition of alloy solvents during the alloying process. In particular, by providing a longitudinal guide rail that cooperates with roller I, and a transverse guide rail that cooperates with rollers II at the four corners of the bottom of the longitudinal guide rail, the accuracy of mobile positioning can be effectively improved.

[0021] 4. The utility model adopts high-purity graphite as the stirring head. Since high-purity graphite has good thermal conductivity, high temperature resistance, corrosion resistance and other characteristics, and its thermal expansion coefficient is small during high-temperature use, the stirring head has a certain strain resistance to rapid heating and rapid cooling, making it not easy to burn in the high-temperature melt, thereby increasing the service life of the stirring head, and the stirring head of high-purity graphite is not easy to introduce impurities into the alloy melt to cause pollution.

[0022] 5. The utility model can be applied not only to the stirring of resistance furnaces but also to the stirring of medium frequency induction furnaces by specifically designing the size of the stirring unit according to the scale of the equipment, and has strong adaptability.

[0023] Therefore, the utility model has the characteristics of simple structure, easy operation, high reliability and uniform stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0025] Figure 2 for Figure 1 A front view of

[0026] Figure 3 for Figure 2 A top view of

[0027] In the figure: 1-base, 2-roller I, 3-bracket, 4-travel switch, 5-limit switch, 6-side guide rod, 7-longitudinal guide rail, 8-transverse guide rail, 9-roller II, 11-motor I, 12-screw, 13-main rod, 14-connecting seat, 15-support frame I, 16-reducer I, 21-motor II, 22-stirring shaft, 23-stirring head, 24-support frame II, 25-reducer II, 26-connecting head, 27-fastening screw. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] like Figure 1 , 2 As shown in FIG. 3 , the utility model comprises a base 1, a stirring unit, and a feeding unit, and rollers Ⅰ 2 are arranged at the four corners of the bottom surface of the base 1;

[0030] The feeding unit includes a motor Ⅰ11, a screw rod 12, a main rod 13, a connecting seat 14, and a support frame Ⅰ15. The main rod 13 is vertically fixed on the top surface of the base 1. The top of the main rod 13 is provided with a screw hole extending downward. The screw rod 12 is threadedly connected and extends into the screw hole of the main rod 13. The connecting seat 14 is slidably sleeved on the main rod 13. The support frame Ⅰ15 is vertically fixed on the connecting seat 14 and the top extends to the top of the screw rod 12. The motor Ⅰ11 is fixed on the top of the support frame Ⅰ15, and the driving shaft of the motor Ⅰ11 is connected to the screw rod 12;

[0031] The stirring unit includes a motor II 21, a stirring shaft 22, a stirring head 23, and a support frame II 24. The support frame II 24 is vertically fixed on a connecting seat 14 away from the main rod 13. The motor II 21 is fixed at the top of the support frame II 24. The stirring shaft 22 rotates through the connecting seat 14 and the support frame II 24. The top of the stirring shaft 22 is connected to the driving shaft of the motor II 21. The top of the stirring head 23 is detachably fixedly connected to the bottom end of the stirring shaft 22. The lower part of the stirring head 23 can extend into the crucible for alloy smelting.

[0032] A bracket 3 parallel to the main rod 13 is fixedly provided on the top surface of the base 1, and travel switches 4 corresponding to the connecting seat 14 are arranged at intervals on the bracket 3. The travel switch 4, motor I11 and motor II21 are electrically connected to the control system (not shown in the figure) respectively.

[0033] Limit switches 5 are fixedly arranged on the bracket 3 above the upper travel switch 4 and below the lower travel switch 4, and the limit switches 5 are electrically connected to the control system. The limit switches can prevent the stirring head from colliding with the crucible in the smelting furnace or the lead screw from hitting the screw hole of the main rod after the travel switch fails in a high temperature and high dust working environment, thereby improving the reliability of use.

[0034] The top surface of the base 1 is also fixedly provided with a side guide rod 6 parallel to the main rod 13, and the side guide rod 6 slides through the connecting seat 14, or the side guide rod 6 is arranged on both sides of the connecting seat 14 and slides against the side of the connecting seat 14. The side guide rod can prevent the connecting seat from rotating when the screw rotates.

[0035] Two mutually parallel longitudinal guide rails 7 are further arranged below the base 1 , and rollers Ⅰ 2 arranged at the four corners of the bottom surface of the base 1 are in rolling cooperation with the longitudinal guide rails 7 .

[0036] Two mutually parallel transverse guide rails 8 are also arranged below the longitudinal guide rail 7. The two longitudinal guide rails 7 form a "mouth"-shaped hollow frame and rollers II 9 are arranged at the four corners of the bottom. The rollers II 9 roll with the transverse guide rails 8. The two transverse guide rails 8 are fixed on the ground or the top surface of the smelting furnace.

[0037] The rollers I2 and II9 are both made of metal. The roller I2 at at least one end of the bottom surface of the base 1 and the roller II9 at at least one end of the bottom of the frame formed by the two longitudinal guide rails 7 are provided with brakes.

[0038] The motor shafts of the motor I11 and / or the motor II21 are also connected to reducers I16 and II25 respectively. The output shaft of the reducer I16 is connected to the screw rod 12 , and the output shaft of the reducer II25 is connected to the stirring shaft 22 .

[0039] A connector 26 is fixedly provided at the bottom end of the stirring shaft 22, and a connecting hole extending upward is provided at the bottom end of the connecting head 26. The stirring handle of the stirring head 23 can be slidably inserted into the connecting hole. A fastening screw 27 is threadedly provided on the side wall of the connecting head 26, and the bottom end of the fastening screw can be pressed against the stirring handle in the connecting hole.

[0040] The connecting hole at the bottom end of the connecting head 26 is a polygonal hole, and the top of the stirring handle of the stirring head 23 is a polygonal column that is adapted to the shape of the connecting hole.

[0041] The stirring part of the stirring head 23 is a high-purity graphite head of a plate-like structure or a plate-like structure with a plurality of through holes distributed on the surface, and the stirring handle of the stirring head 23 is a stainless steel rod or a titanium alloy rod.

[0042] The control system is a PLC controller or a traditional relay-switch control circuit.

[0043] The working principle and working process of the utility model are as follows:

[0044] like Figure 1 , 2 As shown in Figure 3, before use, according to the position of the smelting furnace that needs to be stirred, open the brakes of roller I2 and / or roller II9, move the base 1 to the top of the corresponding smelting furnace and lock the brakes of roller I2 and / or roller II9.

[0045] During stirring, first, the control system controls the motor I11 to start, drives the screw 12 to rotate so that the connecting seat 14 drives the motor II21 and the stirring head 23 to move downward along the main rod 13, and finally makes the stirring head 23 drop to a predetermined depth in the smelting furnace; then the motor II21 is controlled to start, and drives the stirring head 23 to rotate to stir the alloy liquid; during the rotating stirring process of the stirring head 23, the motor I11 can be controlled as needed to make the stirring head 23 stir at a fixed depth, and the motor I11 can also be controlled to run uninterruptedly as needed. When the stirring head 23 drops to a predetermined minimum depth (that is, the bottom surface of the connecting seat 14 abuts the lower travel switch 4 at this time), the control system controls the motor I11 to change the rotation direction to drive the stirring head 23 to rise. When the stirring head 23 rises to a predetermined maximum depth (that is, the top surface of the connecting seat 14 abuts the upper travel switch 4 at this time), the control system controls the motor I11 to change the rotation direction to drive the stirring head 23 to drop. In this way, the cyclic control completes the up and down reciprocating stirring.

[0046] After the stirring is completed, the control system turns off the motor II 21, and at the same time controls the motor I 11 to drive the stirring head 23 to rise above the smelting furnace (at this time, the top surface of the connecting seat 14 abuts against the upper limit switch 5), and then turns off the motor I 11, and then releases the brakes of the roller I 2 and / or roller II 9, and moves the base 1 to the side wall of the smelting furnace or above other smelting furnaces that need stirring, to complete the stirring of the corresponding smelting furnace.

[0047] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A composite stirring device for alloy smelting, characterized in that It comprises a base (1), a stirring unit and a feeding unit, wherein rollers I (2) are arranged at four corners of the bottom surface of the base (1); The feeding unit comprises a motor I (11), a screw (12), a main rod (13), a connecting seat (14), and a support frame I (15), wherein the main rod (13) is vertically fixed on the top surface of the base (1), the top end of the main rod (13) is provided with a screw hole extending downward, the screw (12) is threadedly connected and extends into the screw hole of the main rod (13), the connecting seat (14) is slidably sleeved on the main rod (13), the support frame I (15) is vertically fixed on the connecting seat (14) and the top end extends to above the screw (12), the motor I (11) is fixedly arranged on the top end of the support frame I (15), and the driving shaft of the motor I (11) is connected to the screw (12); The stirring unit comprises a motor II (21), a stirring shaft (22), a stirring head (23), and a support frame II (24); the support frame II (24) is vertically fixedly arranged on a connecting seat (14) on a side away from the main rod (13); the motor II (21) is fixedly arranged at the top of the support frame II (24); the stirring shaft (22) rotates and penetrates the connecting seat (14) and the support frame II (24); the top end of the stirring shaft (22) is connected to the driving shaft of the motor II (21); the top end of the stirring head (23) is detachably fixedly connected to the bottom end of the stirring shaft (22); and the lower part of the stirring head (23) can extend into a crucible for alloy smelting.

2. The composite stirring device for alloy smelting according to claim 1, characterized in that A bracket (3) parallel to the main rod (13) is fixedly arranged on the top surface of the base (1), and travel switches (4) corresponding to the connecting seat (14) are arranged at intervals on the bracket (3), and the travel switch (4), motor I (11) and motor II (21) are respectively electrically connected to the control system.

3. The composite stirring device for alloy smelting according to claim 2, characterized in that Limit switches (5) are also fixedly arranged on the bracket (3) above the upper travel switch (4) and below the lower travel switch (4), respectively. The limit switches (5) are electrically connected to the control system.

4. The composite stirring device for alloy smelting according to claim 2, characterized in that A side guide rod (6) parallel to the main guide rod (13) is also fixedly provided on the top surface of the base (1), and the side guide rod (6) slides through the connecting seat (14), or the side guide rod (6) is provided on both sides of the connecting seat (14) and slides against the side surface of the connecting seat (14).

5. The composite stirring device for alloy smelting according to claim 2, characterized in that Two mutually parallel longitudinal guide rails (7) are also arranged below the base (1), and rollers I (2) arranged at the four corners of the bottom surface of the base (1) are in rolling cooperation with the longitudinal guide rails (7).

6. The composite stirring device for alloy smelting according to claim 5, characterized in that Two mutually parallel transverse guide rails (8) are further arranged below the longitudinal guide rail (7). The two longitudinal guide rails (7) form a "mouth"-shaped hollow frame and rollers II (9) are arranged at the four corners of the bottom. The rollers II (9) are in rolling cooperation with the transverse guide rails (8). The two transverse guide rails (8) are fixed to the ground or the top surface of the smelting furnace.

7. The composite stirring device for alloy smelting according to claim 6, characterized in that The roller I (2) and roller II (9) are both made of metal. The roller I (2) at at least one end of the bottom surface of the base (1) and the roller II (9) at at least one end of the bottom of the frame formed by the two longitudinal guide rails (7) are provided with brakes.

8. The composite stirring device for alloy smelting according to claim 2, characterized in that The motor shafts of the motor I (11) and / or the motor II (21) are also connected to a reducer I (16) and a reducer II (25) respectively. The output shaft of the reducer I (16) is connected to the screw rod (12), and the output shaft of the reducer II (25) is connected to the stirring shaft (22).

9. The composite stirring device for alloy smelting according to any one of claims 1 to 8, characterized in that A connector (26) is fixedly provided at the bottom end of the stirring shaft (22), a connecting hole extending upward is provided at the bottom end of the connecting head (26), a stirring handle of the stirring head (23) can be slidably inserted into the connecting hole, and a fastening screw (27) is threadedly provided on the side wall of the connecting head (26), the bottom end of which can be pressed against the stirring handle in the connecting hole.

10. The composite stirring device for alloy smelting according to claim 9, characterized in that The stirring part of the stirring head (23) is a high-purity graphite head of a plate-like structure or a plate-like structure with a plurality of through holes distributed on the surface, and the stirring handle of the stirring head (23) is a stainless steel rod or a titanium alloy rod.

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