阅读说明：本技术 一种电解铝吸铝量控制装置 (Aluminum absorption amount control device for electrolytic aluminum ) 是由 陈雨 于 2019-10-29 设计创作，主要内容包括：本发明涉及电解铝加工设备领域,具体涉及一种电解铝吸铝量控制装置,包括天车轨道、天车、真空抬包、收卷装置和电解铝槽,包括负压形成机构和管道定位机构,天车的下端设有重力检测组件,收卷装置安装在天车轨道的端部,负压形成机构包括负压形成组件和气流控制阀,气流控制阀安装在负压形成组件上,负压形成组件的一端与收卷装置连接,负压形成组件的另一端与真空抬包固定连接,管道定位机构包括管道定位组件和固定组件,固定组件安装在管道定位组件的中部。本发明通过气流控制阀的设置能够避免逐渐衰减工作的排气泵继续工作以及真空抬包内部残存的负压继续吸铝,保证了吸铝量控制的准确性,在工作过程中直管的深度不会改变,保证吸铝质量。(The invention relates to the field of electrolytic aluminum processing equipment, in particular to an electrolytic aluminum absorption quantity control device which comprises a crown block track, a crown block, a vacuum ladle, a winding device and an electrolytic aluminum tank and comprises a negative pressure forming mechanism and a pipeline positioning mechanism, wherein the lower end of the crown block is provided with a gravity detection assembly, the winding device is installed at the end part of the crown block track, the negative pressure forming mechanism comprises a negative pressure forming assembly and an airflow control valve, the airflow control valve is installed on the negative pressure forming assembly, one end of the negative pressure forming assembly is connected with the winding device, the other end of the negative pressure forming assembly is fixedly connected with the vacuum ladle, the pipeline positioning mechanism comprises a pipeline positioning assembly and a fixing assembly, and the fixing assembly is installed in the middle part of the pipeline positioning assembly. The invention can avoid the continuous work of the exhaust pump which gradually attenuates and the continuous aluminum suction of residual negative pressure in the vacuum ladle through the arrangement of the airflow control valve, thereby ensuring the accuracy of the aluminum suction amount control, ensuring the aluminum suction amount without changing the depth of the straight pipe in the working process.)

1. The utility model provides an aluminium volume controlling means is inhaled to electrolytic aluminum, includes overhead traveling crane track (1), overhead traveling crane (2), vacuum two-man ladle (3), coiling mechanism (4) and electrolytic aluminum groove (5), its characterized in that: including negative pressure forming mechanism (6) and pipeline positioning mechanism (7), sliding fit between the upper end and the two at overhead traveling crane track (1) is installed to overhead traveling crane (2), the lower extreme of overhead traveling crane (2) is equipped with gravity detection subassembly (8), the lower extreme at gravity detection subassembly (8) is installed in vacuum two-man ladle (3), the tip at overhead traveling crane track (1) is installed in coiling mechanism (4), negative pressure forming mechanism (6) are including negative pressure forming assembly (61) and airflow control valve (62), airflow control valve (62) are installed on negative pressure forming assembly (61), the one end and the coiling mechanism (4) of negative pressure forming assembly (61) are connected, the other end and the vacuum two-man ladle (3) fixed connection of negative pressure forming assembly (61), pipeline positioning mechanism (7) are including pipeline positioning assembly (71) and fixed subassembly (72), the fixing assembly (72) is arranged in the middle of the pipeline positioning assembly (71).

2. The electrolytic aluminum suction amount control device according to claim 1, characterized in that: gravity detection subassembly (8) are including connecting plate (82), gravity sensor (83), couple (84) and two connection chain (85), the upper end of two connection chain (85) respectively with the both sides fixed connection of overhead traveling crane (2), the both ends that connecting plate (82) are level setting and connecting plate (82) respectively with the lower extreme fixed connection of two connection chain (85), the lower extreme at connecting plate (82) is fixed in gravity sensor (83), the lower extreme at gravity sensor (83) is installed in couple (84), the vacuum is lifted package (3) and is hung on couple (84).

3. The electrolytic aluminum suction amount control device according to claim 1, characterized in that: the negative pressure forming assembly (61) comprises an exhaust pipeline (611), an exhaust pump (612), an exhaust pipeline (613) and an ejector (614), the ejector (614) is installed at the upper end of the vacuum ladle (3), the ejector (614) is communicated with the interior of the vacuum ladle (3), the exhaust pump (612) is installed at the end of the crown block rail (1), the exhaust pump (612) is installed in the middle of the exhaust pipeline (611), an electromagnetic valve (615) is arranged at the end of the exhaust pipeline (611), one end of the exhaust pipeline (613) is communicated with the ejector (614), and the other end of the exhaust pipeline (613) is communicated with the exhaust pipeline (611) through the electromagnetic valve (615).

4. The electrolytic aluminum suction amount control device according to claim 3, characterized in that: a vent pipe (6131) and a control pipe (6132) are arranged in the air extraction pipeline (613), one end of the vent pipe (6131) is communicated with the ejector (614), one end of the control pipe (6132) is communicated with the airflow control valve (62), and the other ends of the vent pipe (6131) and the control pipe (6132) are communicated with the exhaust pipeline (611) through an electromagnetic valve (615).

5. The electrolytic aluminum suction amount control device according to claim 4, characterized in that: airflow control valve (62) include valve body (621) and reposition of redundant personnel pipeline (622), the upper end of reposition of redundant personnel pipeline (622) and the inside intercommunication of valve body (621), two lower ports of reposition of redundant personnel pipeline (622) communicate with vacuum two-man ladle (3) and ejector (614) respectively, the inside of valve body (621) is equipped with the control chamber, be equipped with intake pipe (624) with the control chamber intercommunication on the lateral wall of valve body (621), be equipped with control gasbag (625) in the control chamber, the one end of control pipe (6132) runs through behind valve body (621) and communicates with control gasbag (625).

6. The electrolytic aluminum suction amount control device according to claim 1, characterized in that: the pipeline positioning assembly (71) comprises a corrugated pipe (711), a straight pipe (712) and a floating air bag (713), the fixing assembly (72) is installed in the middle of the floating air bag (713), the straight pipe (712) is fixedly connected with the floating air bag (713) through the fixing assembly (72), one end of the corrugated pipe (711) is fixedly connected with the upper end of the straight pipe (712), and the other end of the corrugated pipe (711) is communicated with the vacuum ladle (3).

7. The electrolytic aluminum suction amount control device according to claim 6, characterized in that: the fixing assembly (72) comprises a fixing block (721), a fixing hole (722), a fixing shaft (723) and a rotating block (724), the fixing block (721) is installed in the middle of the floating air bag (713), the fixing hole (722) is arranged in the middle of the fixing block (721), the middle of the fixing block (721) is provided with an internal thread (725), the fixed shaft (723) is of a hollow structure, the lower part of the fixed shaft (723) is inserted in the fixed hole (722), the fixed shaft (723) is in threaded fit with the internal thread (725), the rotating block (724) is installed at the upper end of the fixed shaft (723), a plurality of elastic strips (726) distributed circumferentially are arranged in the fixing hole (722), the lower end of each elastic strip (726) is fixedly connected with the fixing block (721), and the upper end of each elastic strip (726) is inserted in the middle of the fixing shaft (723).

8. The electrolytic aluminum suction amount control device according to claim 1, characterized in that: the lower part of overhead traveling crane track (1) one end is equipped with observation room (9) and support column (10), be equipped with display screen (11) on support column (10).

Technical Field

The invention relates to the field of electrolytic aluminum processing equipment, in particular to an electrolytic aluminum absorption quantity control device.

Background

The electrolytic aluminum is aluminum obtained by electrolysis, and the modern electrolytic aluminum industrial production adopts a cryolite-alumina molten salt electrolysis method. The molten cryolite is solvent, alumina is solute, carbosome is anode, aluminium liquid is cathode, strong direct current is introduced, electrochemical reaction is carried out on two poles in the electrolytic aluminium tank at 950-970 ℃, namely electrolysis. In the electrolytic process, a solution containing a large amount of aluminum elements needs to be pumped into the vacuum ladle, so that impurities at the bottom of the electrolytic aluminum tank and upper-layer impurity liquid are removed, and the aluminum is processed in a centralized volume mode.

Chinese patent No. CN104357879B discloses an electrolytic aluminum absorption quantity control system, relates to the technical field of aluminum electrolysis production, and is designed for solving the problems of uncontrollable aluminum absorption, low working efficiency and the like of the existing vacuum ladle. The vacuum ladle comprises an electronic weighing device, a vacuum ladle connected with the electronic weighing device and an electric cabinet respectively connected with a control valve and the electronic weighing device, wherein the vacuum ladle is connected with a ground air source through an air pipe provided with the control valve. When aluminum is sucked, the electric cabinet opens the control valve, high-pressure air of a ground air source is introduced, so that the vacuum ladle starts to suck aluminum, in the aluminum sucking process, the electronic weighing device transmits a weight signal to the electric cabinet, the electric cabinet automatically calculates the aluminum sucking speed and controls the aluminum sucking time, the purpose of automatically controlling the aluminum sucking amount is achieved, and when the planned aluminum sucking amount is reached, the electric cabinet closes the control valve to complete one-time aluminum sucking. The invention has simple structure and convenient operation, improves the aluminum absorption work efficiency, realizes the automatic control of quantitative aluminum absorption, has accurate and reliable aluminum absorption data and prolongs the service life of the electrolytic aluminum tank.

When the weighing device is used, the mass sensor detects the mass of the vacuum ladle in real time, the electronic weighing device obtains mass parameters, and transmits the mass parameters to the weighing module, and the calculation method of the aluminum absorption speed parameter specifically comprises the following steps: the CPU subtracts the mass value of the vacuum two-man ladle weighed by the electronic weighing device obtained at the previous time from the mass value of the vacuum two-man ladle weighed by the electronic weighing device obtained at the next time, and then divides the value by the interval time of the two detections, namely the aluminum absorption speed. The CPU automatically controls the aluminum absorption time through the aluminum absorption speed.

Firstly, in the operation process of the equipment, if the aluminum absorption speed is calculated and controlled according to the method, no problem exists, but after the aluminum absorption amount reaches a certain amount, the equipment stops operating, the exhaust fan can continuously work for a while, in addition, the negative pressure in the vacuum ladle can also continue to absorb aluminum until the internal and external air pressures are the same, and the working process of the fan and the negative pressure aluminum absorption process are gradually attenuated, at the moment, the calculation and control can not be realized through the CPU, so that the control method can still cause that the aluminum absorption amount can not be accurately controlled when in use; secondly, the liquid level can descend when inhaling aluminium in the pipeline of inhaling aluminium, and then can lead to inhaling the solution layer that aluminium pipeline corresponds to change, in sucking the vacuum ladle with the impurity of tank bottom or the solution on upper strata easily, and then influence the quality of aluminium.

Disclosure of Invention

The invention aims to solve the technical problem of providing an electrolytic aluminum absorption quantity control device.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an aluminium volume controlling means is inhaled to electrolytic aluminum, includes overhead traveling crane track, overhead traveling crane, vacuum ladle, coiling mechanism and electrolytic aluminum groove, includes negative pressure forming mechanism and pipeline positioning mechanism, the overhead traveling crane is installed in overhead traveling crane track upper end and sliding fit between the two, the lower extreme of overhead traveling crane is equipped with gravity determine module, the vacuum ladle is installed at gravity determine module's lower extreme, the orbital tip at the overhead traveling crane is installed to the coiling mechanism, negative pressure forming mechanism includes negative pressure formation subassembly and air current control valve, the air current control valve is installed on the negative pressure formation subassembly, the one end and the coiling mechanism of negative pressure formation subassembly are connected, and the other end and the vacuum ladle fixed connection of negative pressure formation subassembly, pipeline positioning mechanism includes pipeline positioning assembly and fixed subassembly, fixed subassembly installs the middle part at pipeline positioning assembly.

Further, the gravity detection subassembly includes connecting plate, gravity sensor, couple and two connection chain, the upper end of two connection chain respectively with the both sides fixed connection of overhead traveling crane, the connecting plate is the level setting and the both ends of connecting plate respectively with the lower extreme fixed connection of two connection chain, gravity sensor fixes the lower extreme at the connecting plate, the lower extreme at gravity sensor is installed to the couple, the vacuum is lifted the package and is hung on the couple.

Further, the negative pressure forms the subassembly and includes exhaust duct, exhaust pump, bleed-off line and ejector, the ejector is installed in the inside intercommunication of the upper end of vacuum ladle and ejector and vacuum ladle, the exhaust pump is installed at the orbital tip of overhead traveling crane, and the exhaust pump installs at exhaust duct's middle part, exhaust duct's tip is equipped with the solenoid valve, bleed-off line's one end and ejector intercommunication, bleed-off line's the other end passes through solenoid valve and exhaust duct intercommunication.

Further, a vent pipe and a control pipe are arranged inside the air exhaust pipeline, one end of the vent pipe is communicated with the ejector, one end of the control pipe is communicated with the airflow control valve, and the other ends of the vent pipe and the control pipe are communicated with the air exhaust pipeline through electromagnetic valves.

Further, the airflow control valve comprises a valve body and a flow distribution pipeline, the upper end of the flow distribution pipeline is communicated with the inside of the valve body, two lower ports of the flow distribution pipeline are communicated with the vacuum ladle and the ejector respectively, a control cavity is arranged inside the valve body, an air inlet pipe communicated with the control cavity is arranged on the side wall of the valve body, a control air bag is arranged in the control cavity, and one end of the control pipe is communicated with the control air bag after penetrating through the valve body.

Further, the pipeline positioning assembly comprises a corrugated pipe, a straight pipe and a floating air bag, the fixing assembly is installed in the middle of the floating air bag, the straight pipe is fixedly connected with the floating air bag through the fixing assembly, one end of the corrugated pipe is fixedly connected with the upper end of the straight pipe, and the other end of the corrugated pipe is communicated with the vacuum ladle.

Further, fixed subassembly includes fixed block, fixed orifices, fixed axle and rotatory piece, the fixed block is installed at the middle part of showy gasbag, and the fixed orifices sets up the middle part at the fixed block, the middle part of fixed block is equipped with the internal thread, the fixed axle is hollow structure and the lower part of fixed axle is pegged graft in the fixed orifices, fixed axle and internal thread spiro union cooperation, rotatory piece is installed in the upper end of fixed axle, be equipped with a plurality of in the fixed orifices and be the elasticity strip that the circumference distributes, every the lower extreme of elasticity strip all with fixed block fixed connection, every the middle part at the fixed axle is all pegged graft to the upper end of elasticity strip.

Further, the lower part of overhead traveling crane track one end is equipped with observation room and support column, be equipped with the display screen on the support column.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the invention detects the quality change of the vacuum ladle through the gravity sensor, when the weight detected by the gravity sensor reaches a preset value, the exhaust pump stops working, the electromagnetic valve opens the control pipe, the air in the control air bag can be directly exhausted, then the external air enters the control cavity from the air inlet pipe and enters the vent pipe and the vacuum ladle through the flow passage, the internal negative pressure is rapidly filled, compared with the prior art, the invention can avoid the continuous work of the exhaust pump which gradually attenuates and the continuous aluminum absorption of the residual negative pressure in the vacuum ladle, thereby ensuring the accuracy of the aluminum absorption amount control.

Secondly, the floating airbag is fixed in the middle of the floating airbag through the straight pipe, when the floating airbag is used, the floating airbag always floats at the upper end of the liquid level, and the thickness of the upper layer of liquid is always kept unchanged under the condition that the upper layer of liquid is not pumped away, so that the depth of the lower end of the straight pipe is also always kept unchanged and is inserted into the aluminum layer, and therefore impurities at the bottom layer and the upper layer of liquid cannot be pumped out in the working process, and the quality of aluminum in the vacuum ladle can be guaranteed.

Thirdly, before the aluminum electrolysis cell is operated, the straight pipe is adjusted according to the depth of an aluminum solution layer in the aluminum electrolysis cell, the fixed shaft is rotated through the rotating block to move upwards, all the elastic strips loosen the straight pipe, then the straight pipe is moved, the depth of the lower end of the straight pipe is adjusted, the fixed shaft is driven to rotate through the rotating block, the fixed shaft is further moved along the axis of the fixed hole, when the fixed shaft moves downwards, the upper ends of the elastic strips can be pushed to abut against the straight pipe, the position of the straight pipe is further fixed, the operation is simple, the use is convenient, the depth of the lower end of the straight pipe can be adjusted according to different conditions, and therefore the application range of the aluminum electrolysis cell is expanded.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic perspective view of the gravity sensing assembly of the present invention;

FIG. 3 is a partial front view of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a partial top view of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a partial top view of the pipe positioning mechanism of the present invention;

fig. 8 is a cross-sectional view taken along line C-C of fig. 7.

The reference numbers in the figures are: the device comprises a crown block rail 1, a crown block 2, a vacuum ladle 3, a winding device 4, an electrolytic aluminum tank 5, a negative pressure forming mechanism 6, a negative pressure forming component 61, an exhaust pipeline 611, an exhaust pump 612, an exhaust pipeline 613, a vent pipe 6131, a control pipe 6132, an ejector 614, an electromagnetic valve 615, an airflow control valve 62, a valve body 621, a shunt pipeline 622, an air inlet pipe 624, a control air bag 625, a pipeline positioning mechanism 7, a pipeline positioning component 71, a corrugated pipe 711, a straight pipe 712, a floating air bag 713, a fixing component 72, a fixing block 721, a fixing hole 722, a fixing shaft 723, a rotating block 724, an internal thread 725, an elastic strip 726, a gravity detection component 8, a connecting plate 82, a gravity sensor 83, a hook 84, a connecting lock chain 85, an observation chamber 9, a supporting column 10 and.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Referring to fig. 1 to 8, an aluminum absorption amount control device for electrolytic aluminum comprises a crown block track 1, a crown block 2, a vacuum ladle 3, a winding device 4 and an electrolytic aluminum tank 5, and comprises a negative pressure forming mechanism 6 and a pipeline positioning mechanism 7, wherein the crown block 2 is installed at the upper end of the crown block track 1 and is in sliding fit with the crown block track 1, a gravity detection component 8 is arranged at the lower end of the crown block 2, the vacuum ladle 3 is installed at the lower end of the gravity detection component 8, the winding device 4 is installed at the end part of the crown block track 1, the negative pressure forming mechanism 6 comprises a negative pressure forming component 61 and an airflow control valve 62, the airflow control valve 62 is installed on the negative pressure forming component 61, one end of the negative pressure forming component 61 is connected with the winding device 4, the other end of the negative pressure forming component 61 is fixedly connected with the vacuum ladle 3, the pipeline positioning mechanism 7 comprises a pipeline positioning component 71 and a fixing component 72, the fixing assembly 72 is installed at the middle of the pipe positioning assembly 71.

When the aluminum electrolysis ladle is used, the structure of the pipeline positioning assembly 71 is adjusted through the fixing assembly 72, the depth of the pipeline positioning assembly 71 in the solution of the aluminum electrolysis bath 5 is further adjusted, then the negative pressure forming assembly 61 works in the vacuum ladle 3 to form negative pressure, aluminum in the aluminum electrolysis bath 5 is sucked into the vacuum ladle 3 through the difference between the internal air pressure and the external air pressure of the vacuum ladle 3, meanwhile, the change of the mass of the vacuum ladle 3 is detected through the gravity detection assembly 8, when the mass of the vacuum ladle 3 reaches a preset index, the negative pressure forming assembly 61 stops working, meanwhile, the air flow control valve 62 works, so that the interiors of the vacuum ladle 3 and the negative pressure forming assembly 61 are communicated with outside air, air enters the vacuum ladle 3, the phenomenon that the residual negative pressure in the vacuum ladle 3 continues to absorb aluminum is avoided, and the quantitative aluminum absorption effect is achieved.

The gravity detection assembly 8 comprises a connecting plate 82, a gravity sensor 83, a hook 84 and two connecting chains 85, the upper ends of the two connecting chains 85 are respectively and fixedly connected with the two sides of the crown block 2, the connecting plate 82 is horizontally arranged, the two ends of the connecting plate 82 are respectively and fixedly connected with the lower ends of the two connecting chains 85, the gravity sensor 83 is fixed at the lower end of the connecting plate 82, the hook 84 is installed at the lower end of the gravity sensor 83, and the vacuum ladle 3 is hung on the hook 84; wherein, gravity sensor 83 is prior art, does not do this and give unnecessary details, and when using, vacuum two-man ladle 3 is connected with couple 84, and gravity of vacuum two-man ladle 3 can pull gravity sensor 83, and then detects the mass change of vacuum two-man ladle 3 through gravity sensor 83, and then confirms the aluminium absorption volume.

The negative pressure forming assembly 61 comprises an exhaust pipeline 611, an exhaust pump 612, an exhaust pipeline 613 and an ejector 614, the ejector 614 is installed at the upper end of the vacuum ladle 3, the ejector 614 is communicated with the inside of the vacuum ladle 3, the exhaust pump 612 is installed at the end of the crown block rail 1, the exhaust pump 612 is installed in the middle of the exhaust pipeline 611, an electromagnetic valve 615 is arranged at the end of the exhaust pipeline 611, one end of the exhaust pipeline 613 is communicated with the ejector 614, and the other end of the exhaust pipeline 613 is communicated with the exhaust pipeline 611 through the electromagnetic valve 615; during operation, the exhaust pump 612 works, air in the ejector 614 is exhausted through the exhaust pipeline 613, meanwhile, air in the vacuum ladle 3 is exhausted under the action of the ejector 614, negative pressure is formed in the vacuum ladle 3, and aluminum in the electrolytic aluminum tank 5 is sucked into the vacuum ladle 3 through the air pressure difference between the inside and the outside of the vacuum ladle 3.

A vent pipe 6131 and a control pipe 6132 are arranged in the air exhaust pipeline 613, one end of the vent pipe 6131 is communicated with the ejector 614, one end of the control pipe 6132 is communicated with the airflow control valve 62, and the other ends of the vent pipe 6131 and the control pipe 6132 are communicated with the air exhaust pipeline 611 through an electromagnetic valve 615; the vent pipe 6131 is used for pumping air in the ejector 614 to form air pressure, and the control pipe 6132 is used for communicating with the airflow control valve 62 to control the operation of the airflow control valve 62.

The airflow control valve 62 comprises a valve body 621 and a diversion pipeline 622, the upper end of the diversion pipeline 622 is communicated with the inside of the valve body 621, two lower ports of the diversion pipeline 622 are respectively communicated with the vacuum ladle 3 and the ejector 614, a control cavity is arranged inside the valve body 621, an air inlet pipe 624 communicated with the control cavity is arranged on the side wall of the valve body 621, a control air bag 625 is arranged in the control cavity, and one end of a control pipe 6132 penetrates through the valve body 621 and then is communicated with the control air bag 625; when the vacuum ladle car works, the electromagnetic valve 615 is controlled to open the control pipe 6132, the control air bag 625 is inflated through the exhaust pump 612, the control air bag 625 is inflated to be expanded, the port of the shunt pipeline 622 and the port of the air inlet pipe 624 are blocked, then aluminum is sucked into the vacuum ladle 3 through the work of the negative pressure forming assembly 61, when the work stops, the electromagnetic valve 615 opens the control pipe 6132, air in the control air bag 625 can be directly exhausted, then external air enters the control cavity from the air inlet pipe 624 and enters the vent pipe 6131 and the vacuum ladle 3 through the shunt pipeline 622, the internal negative pressure is quickly filled, and therefore the situation that the exhaust pump 612 which gradually attenuates to work continuously and the residual negative pressure in the vacuum ladle 3 continues to suck aluminum is avoided, and the accuracy of aluminum sucking amount control is guaranteed.

The pipeline positioning assembly 71 comprises a corrugated pipe 711, a straight pipe 712 and a floating air bag 713, the fixing assembly 72 is installed in the middle of the floating air bag 713, the straight pipe 712 is fixedly connected with the floating air bag 713 through the fixing assembly 72, one end of the corrugated pipe 711 is fixedly connected with the upper end of the straight pipe 712, and the other end of the corrugated pipe 711 is communicated with the vacuum ladle 3; the floating air bag 713 is fixed in the middle of the floating air bag 713 through the straight pipe 712, when the floating air bag 713 is used, the floating air bag 713 always floats at the upper end of the liquid surface, the thickness of the upper-layer liquid is always kept unchanged under the condition that the upper-layer liquid is not drawn away, therefore, the depth of the lower end of the straight pipe 712 is also always kept unchanged and is inserted into the aluminum layer, and therefore the bottom-layer impurities and the upper-layer liquid cannot be drawn out in the working process.

The fixing assembly 72 comprises a fixing block 721, a fixing hole 722, a fixing shaft 723 and a rotating block 724, the fixing block 721 is installed in the middle of the floating air bag 713, the fixing hole 722 is arranged in the middle of the fixing block 721, internal threads 725 are arranged in the middle of the fixing block 721, the fixing shaft 723 is of a hollow structure, the lower portion of the fixing shaft 723 is inserted into the fixing hole 722, the fixing shaft 723 is in threaded fit with the internal threads 725, the rotating block 724 is installed at the upper end of the fixing shaft 723, a plurality of circumferentially distributed elastic strips 726 are arranged in the fixing hole 722, the lower end of each elastic strip 726 is fixedly connected with the fixing block 721, and the upper end of each elastic strip 726 is inserted into the middle of the fixing shaft 723; the fixing shaft 723 is driven to rotate by the rotating block 724, so that the fixing shaft 723 moves along the axis of the fixing hole 722, and when the fixing shaft 723 moves downwards, the upper end of the elastic strip 726 can be pushed to abut against the straight pipe 712, so that the position of the straight pipe 712 is fixed.

The lower part of overhead traveling crane track 1 one end is equipped with observation room 9 and support column 10, be equipped with display screen 11 on the support column 10.

The working principle of the invention is as follows: before working, the straight pipe 712 is adjusted according to the depth of an aluminum solution layer in the electrolytic aluminum tank 5, the fixed shaft 723 is rotated through the rotating block 724 to enable the fixed shaft 723 to move upwards, all the elastic strips 726 loosen the straight pipe 712, then the straight pipe 712 is moved, the depth of the lower end of the straight pipe 712 is adjusted, the fixed shaft 723 is driven to rotate through the rotating block 724, the fixed shaft 723 is further enabled to move along the axis of the fixed hole 722, when the fixed shaft 723 moves downwards, the upper end of the elastic strips 726 can be pushed to abut against the straight pipe 712, the position of the straight pipe 712 is fixed, the floating air bag 713 floats on the solution, the control solenoid valve 615 opens the control pipe 6132, the control air bag 625 is inflated through the exhaust pump 612 to inflate and swell the control air bag 625 and block the port of the shunt pipeline 622 and the port of the air inlet pipe 624, then the exhaust pump 612 works, and air in the ejector 614 is exhausted through the exhaust pipeline 613, meanwhile, air in the vacuum ladle 3 is pumped out under the action of the ejector 614, negative pressure is formed in the vacuum ladle 3, aluminum in the electrolytic aluminum tank 5 is sucked into the vacuum ladle 3 through the air pressure difference between the inside and the outside of the vacuum ladle 3, meanwhile, the mass change of the vacuum ladle 3 is detected through the gravity sensor 83, when the weight detected by the gravity sensor 83 reaches a preset value, the exhaust pump 612 stops working, the electromagnetic valve 615 opens the control pipe 6132, air in the control air bag 625 can be directly exhausted, then external air enters the control cavity from the air inlet pipe 624 and enters the vent pipe 6131 and the vacuum ladle 3 through the flow pipe 622, the internal negative pressure is quickly filled, and therefore the situation that the exhaust pump 612 which gradually attenuates to work continuously and negative pressure remaining in the vacuum ladle 3 continues to suck aluminum is avoided, and the accuracy of aluminum suction amount control is guaranteed.