An online degassing system for molten aluminum

Abstract

The present invention relates to the technical field of aluminum liquid degassing, and in particular to an online aluminum liquid degassing system. The lower end of an installation box is connected to an upper cover, and a stator with a central portion extending therethrough is provided inside the installation box. The stator movably penetrates the bottom wall and upper cover of the degassing box and slides with them in the vertical direction. A rotating rod is inserted into the stator, and the lower end of the rotating rod extends to the outside of the stator and is connected to a rotor. A connecting mechanism is provided between the rotating rod and the stator. A first driving mechanism for driving the rotating rod and stator to move up and down is provided inside the installation box, and a second driving mechanism for driving the rotating rod and rotor to rotate is provided inside the installation box. In this online aluminum liquid degassing system, the rotating rod, rotor, and stator can be adjusted in their vertical position relative to the upper cover. When degassing is required, they are controlled to extend from the installation box and insert into the aluminum liquid. When degassing is not required, they are controlled to retract into the installation box to avoid accidental collision and damage during other operations.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum liquid degassing, and in particular to an aluminum liquid online degassing system. Background Art

[0002] Degassing of molten aluminum can efficiently and quickly remove hydrogen and other gases in molten aluminum, which will reduce pinholes and pores inside the casting and improve the quality of the finished casting.

[0003] Existing aluminum liquid degassing devices often use an inert gas injection method. This gas is sprayed into the molten aluminum via a rotating rotor, forming a large number of dispersed bubbles, thereby performing the degassing and refining process. The rotor and stator are exposed beneath the upper cover. For example, in the patent application CN208308926U, entitled "Technical Solution for Online Degassing Device for Aluminum Liquid," a cantilever is mounted on one side of the lifting mechanism. This cantilever moves upward and downward with the lifting mechanism, and a degassing mechanism is mounted on the cantilever, extending into the degassing chamber. This exposed degassing mechanism can easily collide with the cantilever if the operator is not paying attention, causing damage to the degassing mechanism (rotor and stator).

[0004] In view of the above problems, an online degassing system for molten aluminum is designed. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an online degassing system for molten aluminum.

[0006] The present invention solves the above technical problems through the following technical means:

[0007] An online degassing system for molten aluminum includes an installation box, the lower end of which is connected to an upper cover, a stator with a central portion extending therethrough is disposed within the installation box, the stator movably penetrates the bottom wall and the upper cover of the degassing box and slides in an up-and-down direction therewith, a rotating rod is inserted into the stator, the lower end of the rotating rod extends to the outside of the stator and is connected to a rotor;

[0008] A connecting mechanism is provided between the rotating rod and the stator, a first driving mechanism for driving the rotating rod and the stator to move up and down is provided inside the installation box, and a second driving mechanism for driving the rotating rod and the rotor to rotate is provided inside the installation box.

[0009] As an improvement of the above technical solution, it also includes a control cabinet and a degassing box, wherein the control cabinet is provided with a telescopic mechanism, and a bracket is provided between the upper end of the telescopic mechanism and the installation box and connected through the bracket;

[0010] The upper end of the degassing box is open and matched with the upper cover.

[0011] As an improvement to the above technical solution, the connecting mechanism includes at least two screws, the screws movably passing through the stator, one end of the screw located outside the stator being threadedly engaged with a nut, and one end of the screw located inside the stator being connected to a block, the screw sleeve being provided with a spring, and the two ends of the spring being respectively connected to the stator and the block;

[0012] An annular groove is provided on the rotating rod, and the annular groove is slidably matched with the block.

[0013] As an improvement to the above technical solution, a notch is provided on the block, a roller is rotatably fitted in the notch, and the roller is laterally arranged and abuts against the circumferential side wall of the notch;

[0014] The block is connected to a bearing via a rod. The bearing is longitudinally arranged and abuts against the upper and lower walls of the slot.

[0015] As an improvement of the above technical solution, the first driving mechanism includes a driving member 1 and a tooth groove opened on the outer wall of the stator, and the output end of the driving member 1 is connected to a gear, and the gear is adapted to the tooth groove.

[0016] As an improvement of the above technical solution, the second driving mechanism includes a transmission part and a limiting part, the transmission part includes a driving member 2, a transmission wheel 1 and a transmission wheel 2, the output end of the driving member 2 is connected to the transmission wheel 1, the transmission wheel 1 and the transmission wheel 2 are connected by a transmission belt, and the limiting part is embedded in the middle of the transmission wheel 2.

[0017] As an improvement to the above technical solution, the limiting portion includes a tube body, the tube body passes through the upper wall of the installation box and rotates therewith, and a screw is threadedly engaged in a threaded hole provided on the tube body;

[0018] The upper end of the rotating rod is inserted into the interior of the tube body. A strip groove is longitudinally opened on the rotating rod. One end of the screw is inserted into the interior of the strip groove and slidably matched with the screw.

[0019] As an improvement to the above technical solution, the tube body is mechanically sealed to the installation box, and one end of the tube body located outside the installation box is connected to an elastic seal.

[0020] As an improvement of the above technical solution, an air pump is provided inside the installation box, the air inlet end of the air pump is connected to the inert gas delivery pipe, and the air outlet end of the air pump is connected to a telescopic tube, and the movable end of the telescopic tube is fixed through the side wall of the stator and inserted into the gap between the rotating rod and the stator.

[0021] Beneficial effects of the present invention:

[0022] In this aluminum liquid online degassing system, the upper and lower positions of the rotating rod, rotor and stator relative to the upper cover can be changed. When degassing is required, they are controlled to extend from the installation box and insert into the aluminum liquid. When degassing is not required, they are controlled to retract into the interior of the installation box to avoid accidental collision during other operations, which may cause damage to them.

[0023] The connection mechanism is set to connect the rotating rod and the stator, which meets the requirement that the first driving mechanism drives the rotating rod and the stator to move up and down at the same time, and also meets the requirement that the second driving mechanism only drives the rotating rod to rotate;

[0024] The first driving mechanism is set to drive the rotating rod, rotor and stator to move in the up and down directions; the transmission part is set to complete the rotation of the rotor; the coordinated setting of the limit part and the connecting mechanism facilitates the replacement of the rotating rod and rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an online degassing system for molten aluminum according to an embodiment of the present application;

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-section of the internal structure of the installation box;

[0027] Figure 3 for Figure 2 Enlarged schematic diagram of the middle connecting mechanism;

[0028] Figure 4 for Figure 3 Schematic diagram of the spatial fit between the middle roller and the bearing;

[0029] Figure markings: control cabinet 10; telescopic mechanism 20; installation box 30; bracket 31; air pump 32; telescopic tube 33; degassing box 40; upper cover 41; rotating rod 50; rotor 51; stator 60; connecting mechanism 70; screw 71; nut 72; block 73; spring 74; roller 75; bearing 76; rod 77; annular groove 78; first driving mechanism 80; gear 81; tooth groove 82; second driving mechanism 90; transmission part 91; transmission wheel 1 911; transmission belt 912; transmission wheel 2 913; limiting part 92; tube body 921; screw 922; strip groove 923; elastic seal 924. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment provides an online degassing system for molten aluminum, including a control cabinet 10, an installation box 30 and a degassing box 40. The degassing box 40 is provided with a heater for heating molten aluminum. The control cabinet 10 is provided with a telescopic mechanism 20. A bracket 31 is provided between the upper end of the telescopic mechanism 20 and the installation box 30 and is connected through the bracket 31. The upper end of the degassing box 40 is open, and the lower end of the installation box 30 is connected to an upper cover 41 that is matched with the upper opening of the degassing box 40; a stator 60 with a through middle is provided inside the installation box 30, and the stator 60 movably passes through the bottom wall and the upper cover 41 of the degassing box 40 and slides with them in the upper and lower directions. A rotating rod 50 is inserted in the stator 60, and the lower end of the rotating rod 50 extends to the outside of the stator 60 and is connected to the rotor 51;

[0034] An air pump 32 is provided inside the installation box 30. The air inlet end of the air pump 32 is connected to the inert gas delivery pipe, and the air outlet end of the air pump 32 is connected through a telescopic tube 33. The movable end of the telescopic tube 33 is fixedly passed through the side wall of the stator 60 and inserted into the gap between the rotating rod 50 and the stator 60; a connecting mechanism 70 is provided between the rotating rod 50 and the stator 60, and a first driving mechanism 80 for driving the rotating rod 50 and the stator 60 to move up and down is provided inside the installation box 30. A second driving mechanism 90 for driving the rotating rod 50 and the rotor 51 to rotate is provided inside the installation box 30.

[0035] Liquid aluminum is injected into the degassing box 40. The overall length of the telescopic mechanism 20 is controlled to shorten, driving the installation box 30 to move downward until the upper cover 41 contacts the degassing box 40. The first driving mechanism 80 is controlled to drive the rotor 51 and the stator 60 to be inserted into the liquid aluminum. The air pump 32 is operated to pass inert gas into the liquid aluminum through the gap between the rotating rod 50 and the stator 60. At the same time, the second driving mechanism 90 is controlled to drive the rotor 51 to rotate. The rotating rotor 51 breaks up bubbles and makes the alloy composition in the liquid aluminum more uniform. As the bubbles rise, the online degassing of the liquid aluminum is completed.

[0036] In the present aluminum liquid online degassing system, the upper and lower positions of the rotating rod 50, the rotor 51 and the stator 60 relative to the upper cover 41 can be changed. When degassing is required, they are controlled to extend from the installation box 30 and inserted into the aluminum liquid. When degassing is not required, they are controlled to retract into the interior of the installation box 30 to avoid accidental collision and damage to them during other operations.

[0037] like Figure 2 、 Figure 3 As shown, the connecting mechanism 70 includes at least two screws 71. When there are two screws 71, they are arranged relative to each other to control the rotating rod 50 in the middle position of the stator 60. The screw 71 movably passes through the stator 60. The end of the screw 71 located outside the stator 60 is threadedly engaged with a nut 72, and the end of the screw 71 located inside the stator 60 is connected to a block 73. The screw 71 is sleeved with a spring 74, and the two ends of the spring 74 are respectively connected to the stator 60 and the block 73; an annular groove 78 is opened on the rotating rod 50, and the annular groove 78 is slidably engaged with the block 73. The setting of the annular groove 78 and the block 73 slidingly engaging with each other limits the relative height position of the rotating rod 50 inside the stator 60, and at the same time drives the rotating rod 50 to move synchronously in the up and down directions through the stator 60.

[0038] The connection mechanism 70 is provided to connect the rotating rod 50 and the stator 60, so as to meet the requirement that the first driving mechanism 80 drives the rotating rod 50 and the stator 60 to move up and down simultaneously, and also meet the requirement that the second driving mechanism 90 only drives the rotating rod 50 to rotate.

[0039] like Figure 4 As shown, a slot is provided on the block 73, and a roller 75 is rotatably fitted in the slot. The roller 75 is arranged horizontally and abuts against the circumferential side wall of the slot. When the rotating rod 50 rotates, the sliding friction between the block 73 and the side wall of the slot is changed to rolling friction between the roller 75 and the side wall of the slot; the block 73 is connected to a bearing 76 through a rod 77. The bearing 76 is arranged longitudinally and abuts against the upper and lower walls of the slot. When the rotating rod 50 rotates, the sliding friction between the block 73 and the upper and lower walls of the slot is changed to rolling friction between the bearing 76 and the upper and lower walls of the slot, thereby reducing friction.

[0040] like Figure 2 As shown, the first driving mechanism 80 includes a driving member 1 and a tooth groove 82 opened on the outer wall of the stator 60 . The output end of the driving member 1 is connected to a gear 81 , and the gear 81 is adapted to the tooth groove 82 .

[0041] When the driving member drives the gear 81 to rotate clockwise, the gear 81 engages with the tooth groove 82 to drive the stator 60 to move upward, that is, the stator 60 is retracted into the interior of the installation box 30. When the driving member drives the gear 81 to rotate counterclockwise, the gear 81 engages with the tooth groove 82 to drive the stator 60 to move downward, that is, the stator 60 is extended from the interior of the installation box 30. The setting of the first driving mechanism 80 drives the rotating rod 50, the rotor 51 and the stator 60 to move in the up and down directions.

[0042] like Figure 2 As shown, the second driving mechanism 90 includes a transmission part 91 and a limiting part 92. The transmission part 91 includes a driving member 2, a transmission wheel 1 911 and a transmission wheel 2 913. The output end of the driving member 2 is connected to the transmission wheel 1 911. The transmission wheel 1 911 and the transmission wheel 2 913 are connected by a transmission belt 912. The limiting part 92 is embedded in the middle of the transmission wheel 2 913.

[0043] The second driving member drives the first transmission wheel 911 to rotate, and drives the second transmission wheel 913, the limiting part 92, the rotating rod 50 and the rotor 51 to rotate through the transmission belt 912. The setting of the transmission part 91 completes the rotation of the rotor 51.

[0044] like Figure 2 As shown, the limiting portion 92 includes a tube body 921, which is embedded in the middle position of the transmission wheel 2 913. The tube body 921 passes through the upper wall of the installation box 30 and rotates therewith. The threaded hole opened on the tube body 921 is threadedly engaged with a screw 922. The number of screws 922 is at least two. When the number is two, they are arranged relative to each other so that the rotating rod 50 is installed in the middle position of the tube body 921; the upper end of the rotating rod 50 is inserted into the interior of the tube body 921, and a strip groove 923 is longitudinally opened on the rotating rod 50. One end of the screw 922 is inserted into the interior of the strip groove 923 and slides therewith, which satisfies the setting of the rotating rod 50 moving up and down. At the same time, the tube body 921 can drive the rotating rod 50 to rotate through the screw 922.

[0045] In the limiting portion 92, the screw 922 and the tube body 921 are movably arranged so that the length of the screw 922 inside the tube body 921 can be changed, which facilitates the operation of inserting the rotating rod 50 into the tube body 921; in the connecting mechanism 70, the nut 72 is rotated on the screw 71 in the direction close to the stator 60. At this time, the spring 74 is compressed, and the block 73, roller 75, and bearing 76 are disengaged from the annular groove 78. The nut 72 is rotated on the screw 71 in the direction away from the stator 60. At this time, the spring 74 extends, driving the block 73, roller 75, and bearing 76 to insert into the annular groove 78, making it convenient to extract the rotating rod 50 from the stator 60; the coordinated arrangement of the limiting portion 92 and the connecting mechanism 70 facilitates the replacement of the rotating rod 50 and the rotor 51.

[0046] like Figure 2 As shown, the tube body 921 is mechanically sealed and connected to the installation box 30. One end of the tube body 921 located outside the installation box 30 is connected to an elastic seal 924. When the rotating rod 50 moves upward, the elastic seal 924 is pushed and deformed. When the rotating rod 50 moves downward, the elastic seal 924 is restored. The mechanical sealing connection between the tube body 921 and the installation box 30 and the setting of the elastic seal 924 enable the installation box 30 to form a sealed cavity, thereby avoiding leakage and waste of inert gas.

[0047] It should be noted that, in this document, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An aluminum liquid online degassing system, characterized in that: The invention comprises an installation box (30), wherein the lower end of the installation box (30) is connected to an upper cover (41), and a stator (60) with a central portion passing therethrough is provided inside the installation box (30), wherein the stator (60) movably passes through the bottom wall and the upper cover (41) of the degassing box (40) and slides with the stator (60) in the vertical direction, and a rotating rod (50) is inserted into the stator (60), and the lower end of the rotating rod (50) extends to the outside of the stator (60) and is connected to a rotor (51); A connecting mechanism (70) is provided between the rotating rod (50) and the stator (60); a first driving mechanism (80) is provided inside the installation box (30) for driving the rotating rod (50) and the stator (60) to move up and down; and a second driving mechanism (90) is provided inside the installation box (30) for driving the rotating rod (50) and the rotor (51) to rotate. The connecting mechanism (70) includes at least two screw rods (71), the screw rods (71) movably passing through the stator (60), one end of the screw rod (71) located outside the stator (60) is threadedly engaged with a nut (72), and one end of the screw rod (71) located inside the stator (60) is connected to a block (73), and the screw rod (71) is sleeved with a spring (74), and the two ends of the spring (74) are respectively connected to the stator (60) and the block (73); An annular groove (78) is provided on the rotating rod (50), and the annular groove (78) is in sliding engagement with the block (73).

2. The online degassing system for molten aluminum according to claim 1, characterized in that: It also includes a control cabinet (10) and a degassing box (40), wherein a telescopic mechanism (20) is provided on the control cabinet (10), and a bracket (31) is provided between the upper end of the telescopic mechanism (20) and the installation box (30), and the bracket (31) is connected to the installation box (30); The upper end of the degassing box (40) is open and matched with the upper cover (41).

3. The online degassing system for molten aluminum according to claim 1, characterized in that: A notch is formed on the block (73), and a roller (75) is rotatably fitted in the notch. The roller (75) is laterally arranged and abuts against the circumferential side wall of the notch. The block (73) is connected to a bearing (76) via a rod (77), and the bearing (76) is arranged longitudinally and abuts against the upper and lower walls of the slot.

4. The online degassing system for molten aluminum according to claim 1, characterized in that: The first driving mechanism (80) comprises a driving member 1 and a tooth groove (82) provided on the outer wall of the stator (60), wherein the output end of the driving member 1 is connected to a gear (81), and the gear (81) is adapted to the tooth groove (82).

5. The online degassing system for molten aluminum according to claim 1, characterized in that: The second driving mechanism (90) includes a transmission part (91) and a limiting part (92), the transmission part (91) includes a second driving member, a first transmission wheel (911) and a second transmission wheel (913), the output end of the second driving member is connected to the first transmission wheel (911), the first transmission wheel (911) and the second transmission wheel (913) are connected through a transmission belt (912), and the limiting part (92) is embedded in the middle of the second transmission wheel (913).

6. The online degassing system for molten aluminum according to claim 5, characterized in that: The limiting portion (92) includes a tube body (921), the tube body (921) penetrates the upper wall of the installation box (30) and rotates therewith, and a screw (922) is threadedly engaged in a threaded hole provided in the tube body (921); The upper end of the rotating rod (50) is inserted into the interior of the tube body (921), and a strip groove (923) is longitudinally opened on the rotating rod (50). One end of the screw (922) is inserted into the interior of the strip groove (923) and slidably engaged therewith.

7. The online degassing system for molten aluminum according to claim 6, characterized in that: The tube body (921) is mechanically sealed to the installation box (30), and one end of the tube body (921) located outside the installation box (30) is connected to an elastic seal (924).

8. The online degassing system for molten aluminum according to claim 1, characterized in that: An air pump (32) is provided inside the installation box (30), an air inlet end of the air pump (32) is connected to an inert gas delivery pipe, and an air outlet end of the air pump (32) is connected to a telescopic tube (33), a movable end of the telescopic tube (33) is fixedly passed through the side wall of the stator (60) and inserted into the gap between the rotating rod (50) and the stator (60).

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