CN117620129A - A light alloy reverse suction and liquid transfer device and its process - Google Patents

Abstract

The invention relates to the technical field of light alloy casting, in particular to a light alloy melt back-suction liquid transferring device and a light alloy melt back-suction liquid transferring process used in the light alloy casting process. The liquid transferring bag is used for caching the light alloy molten liquid, is in a static state and is relatively airtight when in work, and forms secondary precipitation purification without gas coiling and slag formation; the heat-preserving pouring furnace quantitatively provides light alloy melt for a casting machine, so that high-quality production of die castings is ensured; the lifting rotating mechanism is used for adjusting and controlling the position of the inverted straw, so that the full liquid-liquid conversion package and the empty liquid-liquid conversion package can be replaced conveniently; the invention greatly shortens the length of the production line, saves energy, protects environment, reduces the production cost of enterprises, improves the automation level and realizes continuous casting operation.

Description

A light alloy reverse suction and liquid transfer device and its process

Technical field

The invention relates to the technical field of light alloy casting, and in particular to a light alloy melt back-suction and liquid-transfer device used in the light alloy casting process and its back-suction and liquid transfer process.

Background technique

During the casting process of light alloys (mainly titanium alloys, magnesium alloys and aluminum alloys), liquid metal needs to be poured into the mold cavity to make various castings or billets. For aluminum alloys that are widely used in light alloys, the liquid can be supplied during the pouring process by melting aluminum ingots or by transferring liquid through a liquid transfer package. Among them, the liquid is transferred through the liquid transfer bag. Currently, most of them use the pouring method to transfer the aluminum liquid in the liquid transfer bag to the pouring furnace. At the same time, magnesium alloy, another metal widely used in light alloys, has not yet developed a mature liquid transfer process in the market. Most of the casting liquid supply is still in the form of direct melting of alloy ingots.

As new technologies and processes put forward new requirements, the above two main traditional liquid supply methods of light alloys have the following problems, as follows:

Aluminum alloy casting field: Especially the field of demand for single large aluminum alloy liquid - the production field of large automobile structural parts such as integrated frames. The weight of a single casting is 200~300kg, and about 20 pieces are produced per hour. The weight of aluminum liquid required per hour About 4 to 6 tons, a large aluminum alloy melting furnace needs to be configured. How to supply liquid to the pouring furnace stably and with high quality will become a very challenging task. At the same time, the dumping process of the liquid transfer package will cause the aluminum alloy melt to seriously absorb hydrogen and oxidize to form slagging, which will lead to the precipitation of hydrogen during the casting production process and cause hydrogen embrittlement, as well as the presence of oxidized slag inclusions inside the casting, seriously affecting the strength and strength of the casting. Toughness and other mechanical properties. In addition, using a liquid transfer bag to pour liquid into the liquid transfer will cause the liquid level of the quantitative pouring furnace to fluctuate too much, and there will be major problems with quantitative accuracy. How to solve these problems is an urgent problem for large-scale integrated aluminum alloy casting.

Magnesium alloy casting field: Since there is no mature magnesium alloy liquid transfer technology, most of this field still uses molten magnesium alloy ingots for casting, which has the following problems:

(1) The alloy workshop needs to cast alloy liquid into alloy ingots, and this process requires a large amount of investment in equipment, production sites, manpower and energy;

(2) Melting the alloy ingot into alloy liquid in the machine-side melting furnace requires further consumption of a large amount of energy. In addition to the material cost in the casting process, the energy cost is mostly the second largest cost in the entire casting cost. Its annual energy The consumption cost basically occupies the purchase cost of a machine-side melting and pouring furnace. How to save a lot of energy is a key factor in the development of the industry. Moreover, during the melting process of alloy ingots, more than 1.5% of the material will be burned, and the cost of burning and Energy costs are comparable, and when not well controlled, can even exceed energy consumption costs;

(3) During the process of melting alloy ingots into alloy liquid, due to melting requirements, the equipment needs to occupy a large space, and labor is required to add materials, which brings large space and labor costs to the enterprise;

(4) In the field of large-scale magnesium alloy casting production, the traditional method of providing alloy liquid by melting alloy ingots requires the deployment of multiple large-scale magnesium alloy melting furnaces. In addition to occupying a large amount of space, it also requires a large investment in equipment procurement costs, and consumes a lot of labor and energy. , and it is still unable to meet the production capacity needs of larger castings, seriously affecting the development and application process of integrated large-scale magnesium alloy castings.

In response to the above problems, a new type of light alloy melt casting machine is developed that is energy-saving, environmentally friendly, has a high level of automation, low labor costs, a small footprint, and a short production line process, and can meet the requirements of large-scale casting production, large liquid supply volume and high quality of light alloy melt. Alloy melt supply technology and equipment are urgent requirements to solve the common problems faced by the industry.

Contents of the invention

In view of this, in order to overcome the shortcomings of the existing technology, the present invention provides a light alloy reverse suction and liquid transfer device and its process, which greatly shortens the length of the production line, saves energy in a wide range, is environmentally friendly, reduces labor, reduces the production site and cost and improve the level of automation.

In order to achieve the above objects, the technical solutions of the present invention are as follows:

A light alloy reverse suction liquid transfer device includes a liquid transfer package and a heat-insulating pouring furnace. A reverse suction pipe is connected between the liquid transfer package and the thermal insulation pouring furnace. A lifting and rotating mechanism is installed at the lower end of the reverse suction pipe. The liquid transfer bag is used to cache the light alloy molten liquid. It is in a static and relatively closed state during operation, forming secondary precipitation and purification, without entraining gas or slagging; the heat preservation pouring furnace provides quantitative casting The machine provides light alloy melt to ensure high-quality production of castings; the lifting and rotating mechanism is used to adjust and control the position of the suction pipe to facilitate the replacement of the full liquid transfer package and the empty liquid transfer package.

The liquid transfer package is composed of a liquid transfer package furnace body, a liquid transfer package crucible provided inside the liquid transfer package furnace body, and a liquid transfer package furnace cover provided on the upper end of the liquid transfer package crucible. The liquid transfer package A laser rangefinder is installed on the furnace cover. The liquid transfer package furnace body is provided with an insulation layer for insulating the liquid transfer package crucible; the laser rangefinder measures the melt in the liquid transfer package crucible through the measurement window on the liquid transfer package furnace cover. Measure the liquid level and height of the liquid.

The heat-preserving pouring furnace includes a pouring furnace body, a pouring furnace crucible disposed inside the pouring furnace body, and a pouring furnace lid disposed on the upper end of the pouring furnace crucible. The pouring furnace lids are respectively provided with Back suction pump, pouring furnace laser liquid level distance meter, upper liquid level probe, working liquid level probe, lower liquid level probe, pouring pump and pouring pipe, the back suction pump is sealed and connected with the back suction pipe, The outlet of the pouring pump is in sealing communication with the pouring pipe. The pouring pipe is connected with a pouring nozzle. The pouring nozzle is connected with the mold of the casting machine. The light alloy melt fully precipitated in the liquid transfer bag is transferred to Insulated pouring furnace, and further transported through the pouring nozzle to the mold cavity of the casting machine to complete the casting molding.

Preferably, the lifting and rotating mechanism includes a frame component, a guide component, an upper mounting plate, a connecting flange, a suction pipe lifting cylinder and a suction pipe rotating cylinder, and the suction pipe lifting cylinder is located in the middle of the frame assembly. , the guide assembly is provided on both sides of the suction pipe lifting cylinder, the upper mounting plate is provided on the piston rod end of the suction pipe lifting cylinder, and the connecting flange is rotatably connected to one end of the upper mounting plate , the reverse suction pipe rotating oil cylinder is provided at the other end of the upper mounting plate, and the output end of the reverse suction pipe rotating oil cylinder is hinged to one side of the connecting flange, and the reverse suction pipe is connected through the connecting flange on the lifting and rotating mechanism. The lifting and rotating mechanism smoothly drives the reverse suction pipe to rise and fall, and rotates with the reverse suction pipe lifting cylinder as the center of rotation, which facilitates the replacement of the full liquid transfer package and the empty liquid transfer package.

Furthermore, the connecting flange is two semi-cylindrical flanges, and the suction pipe and the lifting and rotating mechanism are connected by two semi-cylindrical flange bolts, making installation and disassembly more convenient.

Further, the back-suction pump is a centrifugal pump. A U-shaped liquid inlet pipe is led from the center of the bottom of the back-suction pump. A liquid outlet is provided around the circumference of the back-suction pump casing. The U-shaped back suction pump is The liquid inlet of the liquid inlet pipe has a ball-head structure, the liquid outlet of the back-suction pipe has a bell-mouth structure, and the connection between the back-suction pump and the back-suction pipe is a bell-mouth conical spherical sealing connection.

Further, the suction pipe is composed of an inner tube, an outer tube, a heating device and an insulation layer, and has an inverted U-shaped structure. The vertical section of the suction pipe in the liquid transfer bag is inserted into the crucible of the liquid transfer bag. , and is 200-400mm away from the bottom of the crucible of the liquid transfer bag, and the middle pipe of the back-suction pipe forms an angle of 0-45° with the horizontal plane.

Further, the distance between the lower end surface of the upper liquid level probe and the lower end surface of the pouring furnace cover is 10 to 50 mm, and the distance between the lower end surface of the working liquid level probe and the lower end surface of the pouring furnace cover is The distance between the lower end surface of the lower liquid level probe and the lower end surface of the pouring furnace cover is 100~150mm. It can also be set according to the diameter of the heat preservation pouring furnace and the volume of the casting. The purpose of the above distance value is to accurately control the liquid level height of the light alloy melt in the crucible of the pouring furnace to achieve continuous casting operations.

Furthermore, the back suction pipe and the pouring pipe are provided with heating devices, which can ensure that the light alloy molten liquid will not solidify during transportation and better ensure fluidity.

The patent of the present invention also provides a light alloy reverse suction and liquid transfer process, which uses the light alloy reverse suction and liquid transfer device to complete the process, which includes the following steps:

S1. The reverse suction pipe lifting cylinder of the lifting and rotating mechanism moves upward to drive the reverse suction pipe to the highest position. The reverse suction pipe rotation cylinder moves, driving the reverse suction pipe to rotate at a preset angle with the reverse suction pipe lifting cylinder as the rotation center. At this time, the full liquid is transferred The package moves to the loading station (the station is equipped with a positioning device to ensure that the position of the liquid transfer package is unique), and then the reverse suction pipe lifting cylinder moves downward until the bell mouth of the liquid outlet of the reverse suction pipe closely matches the ball head of the liquid inlet of the reverse suction pump. During the connection, the ball head and the bell mouth are automatically aligned and sealed under the action of the pressing force of the suction pipe lifting cylinder;

S2. When the liquid level in the pouring furnace crucible is higher than the trigger level of the lower liquid level probe and lower than the liquid level of the working liquid level probe, the control system turns on the back-suction pump, and the back-suction pump gently lifts the liquid in the crucible of the liquid transfer package. The alloy melt is sucked into the crucible of the pouring furnace, causing the liquid level in the crucible of the pouring furnace to rise until the working liquid level probe is triggered and energized;

S3. After the working liquid level probe is electrically triggered, the reverse suction pump stops working, and the high-temperature light alloy melt in the reverse suction pipe flows back to the liquid transfer package crucible under the pressure caused by the liquid level difference between the liquid transfer package and the insulation pouring furnace. Inside;

S4. As casting progresses, the pouring pump quantitatively presses the light alloy melt in the crucible of the pouring furnace into the mold cavity of the die-casting machine through the pouring tube and nozzle. The light alloy melt in the crucible of the pouring furnace continues to decrease until The working liquid level probe is out of contact with the light alloy melt and loses power;

S5. The back suction pump restarts, and the high-temperature light alloy melt in the liquid transfer bag is sucked into the pouring furnace crucible through the back suction pump, causing the liquid level in the pouring furnace crucible to rise until the working liquid level probe contacts the light alloy melt again. When the machine comes into contact with the machine and receives electricity, the suction pump stops working;

S6. Repeat steps S4 and S5 in a continuous cycle until the laser rangefinder installed on the furnace cover of the liquid transfer bag measures that the liquid level in the liquid transfer bag reaches the set low level, and the back-suction pump stops working; at this time, the back-suction pipe After the lifting cylinder moves up to drive the reverse suction pipe to the highest position, the reverse suction pipe rotates the cylinder action, driving the reverse suction pipe to rotate to the preset angle, removes the empty liquid transfer bag, moves the full liquid transfer bag into the loading station, and resets the reverse suction pipe rotating cylinder. The reverse suction pipe lifting cylinder moves down, and the above process S1~S5 is repeated, and the continuous casting operation is completed.

Further, in S1 and S6, the preset angle is 5 to 90 degrees to facilitate the replacement of the full liquid transfer package and the empty liquid transfer package.

Furthermore, in order to reduce the influence of the air in the backsuction pipe on the light alloy melt, protective gas can also be introduced into the backsuction pipe every time the liquid is discharged from the backsuction pipe.

The beneficial effects of the present invention are: (1) Using a back-suction pump and a sealed back-suction pipe, the entire liquid transfer process is carried out in the sealed liquid, eliminating large-scale hydrogen absorption and oxidation slagging during the aluminum alloy tipping liquid transfer process. It prevents the occurrence of defects such as hydrogen embrittlement and slag inclusion, and improves the mechanical performance indicators of aluminum alloy castings; (2) In the application field of magnesium alloys, due to the use of relatively sealed liquid transfer packages for liquid transfer, the liquid transfer package The application can be realized, thereby reducing unnecessary processes that consume a lot of energy such as alloy ingot casting and melting, greatly shortening the entire casting process, reducing equipment investment, labor investment, energy investment, site investment, etc.; at the same time, it also reduces This eliminates material burning loss and process defects caused by unnecessary process flow; (3) Since during the liquid transfer process, the liquid transfer package is in a static and relatively closed state, there is no gas entrainment or slagging, and the large-scale melting furnace concentrates on smelting light materials. After the alloy has been purified once, the light alloy molten liquid is allowed to stand again and undergo secondary precipitation and purification in the liquid transfer bag, and the upper half of the light alloy molten liquid is always extracted to avoid stirring the sediment and bringing it into the casting, which effectively improves The quality of the castings is improved; (4) A laser rangefinder and a liquid level probe are used to monitor the liquid level. The PLC control system receives the information to control the liquid level height in real time, thereby accurately controlling the start and stop of the suction pump and pouring pump. Thereby ensuring the precision of quantitative pouring; (5) In view of the current situation of large-scale casting production, the liquid supply volume of traditional technology cannot meet the requirements, the present invention can provide large-scale light alloy melt with excellent product quality for large-scale casting production in a timely manner. Large-scale integrated casting production provides a new melt supply process and equipment solution.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the present invention.

In the figure, 100, liquid transfer package, 101, liquid transfer package furnace body, 102, liquid transfer package crucible, 103, liquid transfer package furnace cover, 200, insulation pouring furnace, 201, pouring furnace body, 202, pouring furnace crucible , 203. Pouring furnace cover, 300. Back suction pipe, 400. Lifting and rotating mechanism, 401. Frame assembly, 402. Guide assembly, 403. Upper mounting plate, 404. Connecting flange, 405. Back suction pipe lifting cylinder, 406 , reverse suction pipe rotating oil cylinder, 500, laser range finder, 600, reverse suction pump, 700, pouring furnace laser level range finder, 800, upper liquid level probe, 900, working liquid level probe, 1000, lower liquid Position probe, 1100, pouring pump, 1200, pouring pipe, 1300, pouring nozzle.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Referring to Figure 1, a light alloy reverse suction liquid transfer device includes a liquid transfer package 100 and an insulating pouring furnace 200. A reverse suction pipe 300 is connected between the liquid transfer package 100 and the thermal insulation pouring furnace 200. The lower end of the reverse suction pipe 300 is installed with Lifting and lowering rotating mechanism 400. The liquid transfer bag 100 is used to cache the light alloy molten liquid. It is in a static and relatively closed state during operation, forming secondary precipitation and purification without entraining gas or slagging; the heat preservation pouring furnace 200 provides a certain amount of pressure for die casting. The machine provides light alloy melt to ensure high-quality production of die-casting parts; the lifting and rotating mechanism 400 is used to adjust and control the position of the suction pipe 300 to facilitate the replacement between the full liquid transfer package 100 and the empty liquid transfer package 100. Ensure multi-machine continuous casting.

The liquid transfer package 100 is composed of a liquid transfer package furnace body 101, a liquid transfer package crucible 102 provided inside the liquid transfer package furnace body 101, and a liquid transfer package furnace cover 103 provided at the upper end of the liquid transfer package crucible 102. A laser range finder 500 is installed on the lid 103 of the liquid ladle furnace. The liquid transfer package furnace body 101 is equipped with an insulation layer for insulating the liquid transfer package crucible 102; the laser rangefinder 500 measures the liquid transfer package crucible through the measurement window on the liquid transfer package furnace cover 103. The liquid level and height of the melt in 102 are measured and monitored.

The heat preservation pouring furnace 200 includes a pouring furnace body 201, a pouring furnace crucible 202 disposed inside the pouring furnace body 201, and a pouring furnace cover 203 disposed on the upper end of the pouring furnace crucible 202. The pouring furnace cover is 203 is provided with a back-suction pump 600, a pouring furnace laser liquid level distance meter 700, an upper liquid level probe 800, a working liquid level probe 900, a lower liquid level probe 1000, a pouring pump 1100 and a pouring pipe 1200. The back-suction pump 600 is in sealing communication with the back-suction pipe 300, and the outlet of the pouring pump 1100 is in sealing communication with the pouring pipe 1200. The pouring pipe 1200 is connected with a pouring nozzle 1300, and the pouring nozzle 1300 is connected to the casting machine. The molds are connected, and the light alloy melt fully precipitated in the liquid transfer bag 100 is transferred to the heat preservation pouring furnace 200, and is further transported to the mold cavity of the casting machine through the gate 1300 to complete the casting molding.

The lifting and rotating mechanism 400 includes a frame component 401, a guide component 402, an upper mounting plate 403, a connecting flange 404, a suction pipe lifting cylinder 405 and a suction pipe rotating cylinder 406. The suction pipe lifting cylinder 405 is provided on the machine. In the middle of the frame assembly 401, the guide assembly 402 is provided on both sides of the suction pipe lifting cylinder 405, the upper mounting plate 403 is provided on the piston rod end of the suction pipe lifting cylinder 405, and the connecting flange 404 Rotatingly connected to one end of the upper mounting plate 403, the reverse suction pipe rotation cylinder 406 is provided at the other end of the upper mounting plate 403, and the output end of the reverse suction pipe rotation cylinder 406 is hinged to the connecting flange 404 On one side, the suction pipe 300 is connected to the lifting and rotating mechanism 400 through the connecting flange 404 . The lifting and rotating mechanism 400 smoothly drives the suction pipe 300 to rise and fall, and rotates with the suction pipe lifting cylinder 406 as the center of rotation, thereby facilitating the replacement of the full liquid transfer package and the empty liquid transfer package. The connecting flange 404 is two semi-cylindrical flanges, and the suction pipe 300 and the lifting and rotating mechanism 400 are connected by two semi-cylindrical flange bolts, making installation and disassembly more convenient.

The reverse suction pump 600 is a centrifugal pump. A U-shaped liquid inlet pipe 601 is drawn from the center of the bottom of the reverse suction pump 600. A liquid outlet 602 is provided at the circumference of the casing of the reverse suction pump 600. The U-shaped liquid inlet pipe 601 of the reverse suction pump 600 is The liquid inlet of the liquid inlet pipe is a ball-head structure, the liquid outlet of the back-suction pipe 300 is a bell-mouth structure, and the connection between the back-suction pump 600 and the back-suction pipe 300 is a bell-mouth conical spherical sealing connection. .

The back-suction pipe 300 is composed of an inner tube, an outer tube, a heating device and an insulation layer, and has an inverted U-shaped structure. The vertical section of the back-suction pipe 300 in the liquid transfer package 100 is inserted into the liquid transfer package crucible 102 in the middle, and 200-400mm away from the bottom of the liquid transfer package crucible 102, and the middle pipe of the back-suction pipe 300 is parallel to the horizontal plane.

The distance between the lower end surface of the upper liquid level probe 800 and the lower end surface of the pouring furnace cover 203 is 10 to 50 mm, and the distance between the lower end surface of the working liquid level probe 900 and the lower end surface of the pouring furnace cover 203 is The distance is 55 to 100 mm, and the distance between the lower end surface of the lower liquid level probe 1000 and the lower end surface of the pouring furnace cover 203 is 100 to 150 mm. The purpose is to accurately control the light alloy molten liquid in the crucible of the pouring furnace. liquid level height to achieve quantitative continuous casting operations.

The patent of the invention also provides a light alloy reverse suction liquid transfer process. The magnesium alloy liquid transfer process is used as an example for detailed description, which includes the following steps:

S1. Fully melt the magnesium alloy ingot with selected composition in a large melting furnace, and then transfer the molten magnesium alloy molten liquid at 670~750°C to the liquid transfer bag 100; at the same time, start the driving button of the lifting and rotating mechanism 400, and pour After the suction pipe lifting cylinder 405 lifts the reverse suction pipe 300 to the highest position, the reverse suction pipe rotation cylinder 406 moves to rotate the reverse suction pipe 300 at a preset angle of 90°, and then transfers the liquid transfer bag 100 containing the melt to the heat preservation pouring furnace 200 At the loading station, the reverse suction pipe rotating cylinder 406 is reset, and the reverse suction pipe lifting cylinder 405 moves downward until the bell mouth of the liquid outlet of the reverse suction pipe 300 is closely connected with the ball head of the liquid inlet of the reverse suction pump 600, waiting for liquid transfer;

S2. Turn on the PLC control system. When the liquid level in the pouring furnace crucible 202 is higher than the lower liquid level probe 1000 triggering liquid level height and lower than the working liquid level probe 900 liquid level height, the control system issues an instruction to start the back-suction pump. 600. Under the action of centrifugal force, the internal impeller of the reverse suction pump 600 sucks the magnesium alloy melt in the crucible 102 of the liquid transfer package into the crucible 202 of the pouring furnace, causing the level of the magnesium alloy melt in the crucible 202 of the pouring furnace to rise until the working fluid Bit probe 900 is triggered and powered;

S3. After the working liquid level probe 900 is electrically triggered, the back-suction pump 600 stops working. The high-temperature magnesium alloy melt in the back-suction pipe 300 has a liquid level difference between the liquid transfer package 100 and the insulation pouring furnace 200 (at this time, the liquid transfer The liquid level of the package crucible 102 is lower than the liquid level of the pouring furnace crucible 202) and flows back into the liquid transfer package crucible 102 under the action of pressure;

S4. As the casting progresses, the control system issues instructions to start the pouring pump 1100, start the die-casting machine at the same time, open the protective gas to the mold cavity of the die-casting machine, preheat the mold to 200-250°C, and the magnesium alloy melt passes through the pouring pipe 1200 The inner tube channel enters the pouring nozzle 1300 and is quantitatively pressed into the mold cavity of the die-casting machine. The injection pressure is 0.2 to 1MPa. After holding the pressure for 2 to 10 minutes, cooling, opening, and cyclic pouring and molding, until it is in the pouring furnace The pouring furnace laser liquid level distance meter 700 installed on the cover 203 measured that the liquid level in the pouring furnace crucible 202 reached the minimum pouring liquid level, the PLC controller issued an instruction to stop the pouring pump 1100, and the working liquid level probe 900 interacted with the magnesium alloy melt Disengagement and loss of power;

S5. The back suction pump 600 restarts, and the high-temperature light alloy melt in the liquid transfer package 100 is sucked into the pouring furnace crucible 202 through the back suction pump 600, causing the liquid level in the pouring furnace crucible 202 to rise until the working liquid level probe 900 contacts the magnesium alloy melt again and gets electricity, and the suction pump 600 stops working;

S6. Repeat steps S4 and S5 in a continuous cycle until the laser rangefinder 500 installed on the liquid transfer package furnace cover 103 measures that the liquid level in the liquid transfer package crucible 102 reaches the set low level, and the back-suction pump stops working; this When the reverse suction pipe lifting cylinder 405 moves up to drive the reverse suction pipe 300 to the highest position, the reverse suction pipe rotation cylinder 406 moves, driving the reverse suction pipe 300 to rotate 90°, which facilitates the removal of the empty liquid transfer bag 100 and moves it into the full liquid transfer bag. 100 to the loading station, the reverse suction pipe rotating cylinder is reset, the reverse suction pipe lifting cylinder moves down, and the above process S1 ~ S5 is repeated, and the continuous casting operation is completed.

The patent of the invention arranges the liquid transfer package 100 and the crucible of the heat-insulating pouring furnace 200 in a heat-insulating shell sealed by a sealing cover, and has a back-suction tube socket on the liquid transfer package furnace cover 103 and the pouring furnace cover 203, and there are also An automatic opening and closing door can be set up to facilitate the automatic sealing of the back suction pipe 300 when entering and exiting, and can be installed on the laser range finder 500, the pouring furnace laser level range finder 700, the upper liquid level probe 800, the working liquid level probe 900, and the lower Under the dual monitoring of the liquid level probe 1000, the PLC control system receives the liquid level height information in real time and controls the start and stop of the suction pump 600 and the pouring pump 1100, thereby ensuring the accuracy of quantitative pouring of the heat preservation pouring furnace 200. During the liquid transfer process of the reverse suction pipe 300, the liquid transfer package 100 is in a static and relatively closed state, with no air entrainment and no slagging. The large-scale melting furnace concentrates on melting the light alloy to complete a purification, and the magnesium alloy melt is reprocessed in the liquid transfer package 100. Standing and secondary precipitation purification, the large-scale smelting furnace continuously supplies liquid to one or more liquid transfer packages 100, which can meet the large-scale demand for high-quality light alloy melt in large-scale light alloy integrated continuous casting, and cooperate with the active pouring The suction pipe 300 and the lifting and rotating mechanism 400 and the liquid transfer package 100 are very convenient for supplying liquid to multiple pouring furnaces to achieve multi-machine continuous pouring, avoiding the need to directly insert the pouring pipe 1200 into the smelting furnace to stir up the sediment at the bottom of the pot and then bring it into In castings, the quality of die casting is improved.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (8)

1. A light alloy reverse suction liquid transfer device, characterized in that it includes a liquid transfer package and a heat-insulating pouring furnace. There is a reverse suction pipe connected between the liquid transfer package and the thermal insulation pouring furnace. The lower end of the reverse suction pipe is installed with a reverse suction pipe. Lifting and rotating mechanism; The liquid transfer package is composed of a liquid transfer package furnace body, a liquid transfer package crucible provided inside the liquid transfer package furnace body, and a liquid transfer package furnace cover provided on the upper end of the liquid transfer package crucible. The liquid transfer package A laser range finder is installed on the furnace cover; The heat-preserving pouring furnace includes a pouring furnace body, a pouring furnace crucible disposed inside the pouring furnace body, and a pouring furnace lid disposed on the upper end of the pouring furnace crucible. The pouring furnace lids are respectively provided with Back suction pump, pouring furnace laser liquid level distance meter, upper liquid level probe, working liquid level probe, lower liquid level probe, pouring pump and pouring pipe, the back suction pump is sealed and connected with the back suction pipe, The outlet of the pouring pump is in sealing communication with the pouring pipe, and the pouring pipe is connected with a pouring nozzle. 2. The light alloy back-suction liquid transfer device according to claim 1, characterized in that the lifting and rotating mechanism includes a frame assembly, a guide assembly, an upper mounting plate, a connecting flange, a back-suction pipe lifting cylinder and a back-suction pipe rotation Oil cylinder, the reverse suction pipe lifting oil cylinder is provided in the middle part of the frame assembly, the guide assembly is provided on both sides of the reverse suction pipe lifting oil cylinder, and the upper mounting plate is provided on the piston rod of the reverse suction pipe lifting oil cylinder. end, the connecting flange is rotatably connected to one end of the upper mounting plate, the suction pipe rotation cylinder is provided at the other end of the upper mounting plate, and the output end of the suction pipe rotation cylinder is hinged to the connection Flange, the suction pipe is connected to the lifting and rotating mechanism through the connecting flange. 3. The light alloy reverse suction liquid transfer device according to claim 1, characterized in that the reverse suction pump is a centrifugal pump, and a U-shaped liquid inlet pipe is drawn from the center of the bottom of the reverse suction pump. A liquid outlet is provided on the circumference of the suction pump casing. The liquid inlet of the U-shaped liquid inlet pipe of the back-suction pump is a ball-head structure. The liquid outlet of the back-suction pipe is a bell-mouth structure. The back-suction pump is connected to the suction pump. The connection mode of the back suction pipe is a bell mouth cone surface spherical sealing connection. 4. The light alloy back-suction liquid transfer device according to claim 1, characterized in that the back-suction pipe is composed of an inner tube, an outer tube, a heating device and an insulation layer, and has an inverted U-shaped structure. The vertical section in the liquid transfer package is inserted into the crucible of the liquid transfer package and is 200 to 400 mm away from the bottom of the crucible of the liquid transfer package. The middle pipe of the suction pipe forms an angle of 0 to 45° with the horizontal plane. 5. The light alloy back-suction liquid transfer device according to claim 1, characterized in that the distance between the lower end face of the upper liquid level probe and the lower end face of the pouring furnace cover is 10 to 50 mm, and the working The distance between the lower end surface of the liquid level probe and the lower end surface of the pouring furnace cover is 55 to 100 mm, and the distance between the lower end surface of the lower liquid level probe and the lower end surface of the pouring furnace cover is 100 to 150 mm. 6. The light alloy reverse suction and liquid transfer device according to claim 1, characterized in that the pouring pipe is also provided with a heating device. 7. A light alloy reverse suction and liquid transfer process, characterized in that the light alloy reverse suction and liquid transfer device according to any one of claims 1 to 6 is used, which includes the following steps: S1. The reverse suction pipe lifting cylinder of the lifting and rotating mechanism moves upward to drive the reverse suction pipe to the highest position. The reverse suction pipe rotation cylinder moves, driving the reverse suction pipe to rotate at a preset angle with the reverse suction pipe lifting cylinder as the rotation center. At this time, the full liquid is transferred The package moves to the loading station, and then the reverse suction pipe lifting cylinder moves downward until the bell mouth of the liquid outlet of the reverse suction pipe is closely connected with the ball head of the liquid inlet of the reverse suction pump. The ball head and bell mouth are under the compressive force of the reverse suction pipe lifting cylinder. Under the action, it will automatically align and complete the sealing; S2. When the liquid level in the pouring furnace crucible is higher than the trigger level of the lower liquid level probe and lower than the liquid level of the working liquid level probe, the control system turns on the back-suction pump, and the back-suction pump gently lifts the liquid in the crucible of the liquid transfer package. The alloy melt is sucked into the crucible of the pouring furnace, causing the liquid level in the crucible of the pouring furnace to rise until the working liquid level probe is triggered and energized; S3. After the working liquid level probe is electrically triggered, the reverse suction pump stops working, and the high-temperature light alloy melt in the reverse suction pipe flows back to the liquid transfer package crucible under the pressure caused by the liquid level difference between the liquid transfer package and the insulation pouring furnace. Inside; S4. As casting progresses, the pouring pump quantitatively presses the light alloy melt in the crucible of the pouring furnace into the mold cavity of the die-casting machine through the pouring tube and nozzle. The light alloy melt in the crucible of the pouring furnace continues to decrease until The working liquid level probe is out of contact with the light alloy melt and loses power; S5. The back suction pump restarts, and the high-temperature light alloy melt in the liquid transfer bag is sucked into the pouring furnace crucible through the back suction pump, causing the liquid level in the pouring furnace crucible to rise until the working liquid level probe contacts the light alloy melt again. When the machine comes into contact with the machine and receives electricity, the suction pump stops working; S6. Repeat steps S4 and S5 in a continuous cycle until the laser rangefinder installed on the furnace cover of the liquid transfer bag measures that the liquid level in the liquid transfer bag reaches the set low level, and the back-suction pump stops working; at this time, the back-suction pipe After the lifting cylinder moves up to drive the reverse suction pipe to the highest position, the reverse suction pipe rotates the cylinder action, driving the reverse suction pipe to rotate to a preset angle, removes the empty liquid transfer bag, moves the full liquid transfer bag to the loading station, and the reverse suction pipe lift cylinder moves downward. Repeat the above-mentioned processes S1 to S5 to complete the continuous casting operation. 8. A light alloy reverse suction and liquid transfer process according to claim 7, characterized in that in S1 and S6, the preset angle is 5 to 90°.