Split magnesium alloy semi-solid slurry system and control method thereof

Abstract

The application discloses a split magnesium alloy semi-solid slurry system and a control method thereof, and particularly relates to the technical field of metal mold forming processing. The system comprises a slurry preparation and conveying unit, a feeding unit, a rotating driving unit, a push-pull driving unit, a discharging unit and an induction detection unit. The slurry preparation and conveying unit comprises a conveying pipeline, and a conveying screw is arranged in the conveying pipeline. The discharging unit comprises a horizontal section and an upward section. The horizontal section is fixedly installed at the output end of the conveying pipeline. The induction detection unit is arranged on the upward section. The application builds a system capable of independent slurry preparation and independent slurry quantity detection. The height of the slurry liquid level of the upward section is detected to realize real-time feedback of the material state in the system. The system automatically adjusts the start and stop of the conveying screw through a detection structure, realizes full-automatic and accurate management from raw material melting to quantitative output, and solves the problem of insufficient precision caused by manual judgment in the traditional process.

Description

Technical Field

[0001] This invention relates to the field of metal mold forming and processing technology, and more specifically, to a split-type magnesium alloy semi-solid pulping system and its control method. Background Technology

[0002] Semi-solid metal slurry is a type of solid-liquid mixed metal slurry (among which magnesium alloy semi-solid slurry is more widely used). It is a solid-liquid mixed material formed by controlling the solidification process of the molten metal within the solid-liquid temperature range, thereby forming a uniformly distributed solid phase component. It is widely used in the automotive manufacturing industry.

[0003] Currently, semi-solid metal slurries, such as semi-solid magnesium alloy slurries, are manufactured using an integrated heating and conveying screw and mold. Magnesium alloy raw material particles are fed into the conveying screw, which heats and melts the particles to form a slurry before transporting it. During this process, the magnesium alloy semi-solid slurry needs to be heated to a stable state within the solid-liquid two-phase range. Through strong shearing (the shearing effect of the screw rotation on the material), the coarse dendrites formed during solidification are broken down and reconstructed into fine, near-spherical solid particles, which are then uniformly suspended in the liquid phase to form a special mixture that resembles toothpaste or thick honey and exhibits unique thixotropic properties. The slurry is then continuously fed into the mold, which helps to shape the material.

[0004] However, with this integrated structure, the pulping and conveying are mainly carried out by the continuous operation of the conveying screw. The pulping and conveying volume needs to be judged by human experience, making it difficult to guarantee the amount of molten metal injected into the mold each time. The precision control needs to be improved. Summary of the Invention

[0005] The problem to be solved by the split-type magnesium alloy semi-solid pulping system and its control method provided by the present invention is that: in the existing technology, pulping and conveying are carried out by continuous operation of the conveying screw, and the pulping and conveying volume needs to be judged by human experience, which makes it difficult to guarantee the amount of molten metal injected into the mold each time, and the precision control needs to be improved.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a split-type magnesium alloy semi-solid pulping system, comprising a pulping and conveying unit, a feeding unit, a rotation drive unit, a push-pull drive unit, a discharge unit, and a sensing and detection unit; The pulping and conveying unit includes a conveying pipe, a conveying screw is installed inside the conveying pipe, a rotation drive unit is used to drive the conveying screw to rotate, and a push-pull drive unit is used to drive the conveying screw to move. The discharge unit includes a horizontal section and an upward section. The horizontal section is fixedly installed at the output end of the conveying pipe, and the top of the upward section is provided with an output connecting pipe on the side away from the pulping and conveying unit. The sensing and detection unit is set on the upturned section. The sensing and detection unit includes a liquid level detection component, which is used to detect the liquid level of the slurry in the upturned section. An end cap is fixedly installed at the top of the upturned section, and the liquid level detection component is installed in the end cap.

[0007] Preferably, the feeding unit is located above the input end of the conveying pipe, the rotation drive unit and the push-pull drive unit are located at the end of the conveying pipe close to the feeding unit, the end of the conveying screw away from the feeding unit is provided with a check valve end assembly, a metering chamber is formed in the area corresponding to the horizontal section of the inner cavity of the conveying pipe, a first heating element is provided on the outside of the conveying pipe, and corresponding heat insulation elements and second heating elements are provided on the outside of the horizontal section and the upward section.

[0008] Preferably, the rotation drive unit includes a first connecting rod, a sleeve shaft, and a fixed seat. The fixed seat is fixedly installed on the same base as the material conveying pipe. The sleeve shaft is rotatably installed in the fixed seat. The first connecting rod is slidably installed in the sleeve shaft and a guide structure is provided between the first connecting rod and the sleeve shaft. The first connecting rod is fixedly connected to the conveying screw. The rotation drive unit also includes a drive motor, which is connected to the sleeve shaft via a transmission connection.

[0009] Preferably, the push-pull drive unit includes a push driver, which is provided with an output shaft. The output shaft is connected to the first connecting rod through a push-pull connecting assembly. The push-pull connecting assembly includes a connecting sleeve and a second connecting shaft. The connecting sleeve is fixedly installed on the first connecting rod, and the second connecting shaft is fixedly installed on the output shaft. The second connecting shaft is rotatably installed inside the connecting sleeve, and a limiting structure for lateral limiting of the second connecting shaft is provided inside the connecting sleeve.

[0010] Preferably, the sensing detection unit further includes a buoyancy plug, the upturned section is a straight tube structure, the buoyancy plug is slidably installed in the upturned section, the buoyancy plug has buoyancy in the slurry, the output connecting pipe is a horizontal structure and is provided with a docking structure, the buoyancy plug is provided with an exhaust channel, the end cap is provided with an exhaust docking channel, the exhaust docking channel is connected to a venting connecting pipe, and the area on the end cap corresponding to the exhaust channel is also provided with a sealing structure to seal the exhaust channel.

[0011] Preferably, the venting channel is a straight-through hole structure, the sealing structure is a sealing plug, the sealing plug is adapted to the top of the venting channel, and the liquid level detection component is a distance measuring detector, which is used to detect the distance from the buoyancy plug to the end cap.

[0012] Preferably, the buoyancy plug has a third heating element inside, a conical boss on the top, a guide rod fixedly installed on the top of the conical boss, the guide rod passes through the end cover upward and slides with the end cover, the liquid level detection component is a displacement detector, the sealing structure on the end cover is a conical groove, the shape of the conical groove is adapted to the conical boss, the exhaust channel forms a branch hole in the conical boss extending to the side wall of the conical boss, the exhaust docking channel extends into the conical groove, and when the buoyancy plug rises to the point where the conical boss is inserted into the conical groove, the branch hole and the exhaust docking channel are misaligned.

[0013] Preferably, a narrow flow section is provided in the middle of the venting channel, and a thin-walled elastic tube is fixedly connected to the narrow flow section. When the buoyancy plug floats in the slurry, the top of the slurry in the venting channel is located below the middle of the thin-walled elastic tube. An air-filling chamber is provided in the area corresponding to the outer periphery of the thin-walled elastic tube inside the buoyancy plug. The air-filling chamber is connected to an air-filling and air-discharging pipe, which is used to input and output pressurized fluid into the air-filling chamber, and the temperature of the pressurized fluid is lower than the melting temperature of the slurry.

[0014] Preferably, a rotating sleeve is rotatably mounted on the top of the end cap, the rotating sleeve slides in cooperation with the guide rod, and a guide structure is provided inside the rotating sleeve to guide the sliding of the guide rod. The rotating sleeve is driven by a motor and rotates back and forth, and the bottom wall of the buoyancy plug is set as an inclined surface structure.

[0015] The method for controlling the semi-solid pulping of split-type magnesium alloys includes the following steps: Step 1: Magnesium alloy metal raw material particles are fed into the conveying pipe through the feeding unit, and the first heating element starts to operate at the same time. Step 2: The rotary drive unit drives the conveying screw to rotate, causing the metal raw material to gradually melt and continuously move into the metering chamber to form a slurry. At the same time, the push-pull drive unit controls the conveying screw to pull back, adjusting and controlling the volume of the metering chamber. Step 3: The rotary drive unit continues to drive the conveying screw to rotate, controlling the continued conveying of metal raw materials and slurry, and filling the horizontal and upward sections; Step 4: The slurry level in the buoyancy plug is detected by the liquid level detection component. When the slurry level reaches the specified value, the conveying screw stops rotating. Step 5: The push-pull drive unit controls the conveying screw to push forward, and through the anti-reverse end assembly, it pushes the slurry temporarily stored in the quantitative chamber, the horizontal section and the upward section to flow, so that the slurry in the upward section overflows through the output connector and flows out, thus completing the slurry output.

[0016] The beneficial effects of this invention are as follows: 1. This invention constructs a system capable of independently preparing and detecting the amount of pulp. By detecting the height of the pulp level in the upward section, the system provides real-time feedback on the material status within the system. Furthermore, the system automatically adjusts the start and stop of the conveying screw through the detection structure, achieving fully automatic and precise management from raw material melting to quantitative output. This solves the problem of insufficient accuracy caused by the reliance on manual judgment in traditional processes.

[0017] 2. This invention changes the traditional scheme of directly connecting the pulping system and the mold equipment. By selecting appropriate external equipment and connecting the output pipe, different production molds or other production equipment can be selected according to actual needs. This makes it easier for the pulping system to cooperate with different external equipment and makes it easier to repair and maintain the pulping system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall composition of the pulping system of the present invention; Figure 2 This is a cross-sectional view of the composition and structure of the pulping system of the present invention; Figure 3 This is a schematic diagram of the composition of the rotation drive unit and the push-pull unit of the present invention. Figure 4 This is a schematic diagram of the composition of the material discharge unit and the sensing detection unit of the present invention; Figure 5 This is a schematic diagram of the structure of the sensing detection unit after the first improvement of the present invention; Figure 6 This is a schematic diagram of the structure when the sensing detection unit starts to output magnesium alloy semi-solid slurry after the first improvement of the present invention; Figure 7 This is a schematic diagram of the structure of the sensing and detection unit of the present invention after a second improvement; Figure 8 This is a schematic diagram of the structure when the sensing detection unit starts to output magnesium alloy semi-solid slurry after the second improvement of the present invention; Figure 9 This is a schematic diagram of the improved buoyancy plug according to the present invention; Figure 10 This is a schematic diagram of the internal structure of the improved buoyancy plug of the present invention; Figure 11 This is a schematic diagram of the structure of the thin-walled elastic tube controlled to contract and deform inward according to the present invention; Figure 12 This is a flowchart of the pulping control method of the present invention.

[0019] The attached figures are labeled as follows: 1. Pulping and conveying unit; 11. Conveying pipe; 111. Metering chamber; 12. Conveying screw; 121. Check valve assembly; 13. First heating element; 2. Feeding unit; 3. Rotation drive unit; 31. First connecting rod; 32. Sleeve shaft; 33. Fixed seat; 4. Push-pull drive unit; 41. Top push driver; 42. Output shaft; 43. Push-pull connection assembly; 431. Connecting sleeve; 432. Second connecting shaft; 5. Discharge unit; 51. Horizontal section; 52. Upward section; 53. Output connecting pipe; 54. End cap; 541. Exhaust pipe. Flow channel; 542, sealing plug; 543, conical groove; 55, insulation component; 56, second heating component; 6, sensing detection unit; 61, liquid level detection assembly; 611, distance measuring detector; 612, displacement measuring detector; 62, buoyancy plug; 621, venting channel; 6211, branch hole; 6212, narrow flow section; 622, conical boss; 623, air filling chamber; 6231, air filling and venting pipe; 63, venting connector; 64, third heating component; 641, heating connector; 65, guide slide rod; 651, rotating slide sleeve; 66, thin-walled elastic tube. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Refer to the instruction manual appendix Figure 1 and Figure 2A split-type magnesium alloy semi-solid pulping system includes a pulping and conveying unit 1, a feeding unit 2, a rotation drive unit 3, a push-pull drive unit 4, a discharge unit 5, and a sensing and detection unit 6. The pulping and conveying unit 1 includes a conveying pipe 11, in which a conveying screw 12 is installed. The feeding unit 2 is located above the input end of the conveying pipe 11 and is used to convey magnesium alloy metal raw material particles into the conveying pipe 11. The conveying screw 12 can rotate and slide within the conveying pipe 11. A check valve assembly 121 (including a check ring and a thrust ring, etc.) is provided at the end of the conveying screw 12 facing away from the feeding unit 2. The structure, during the forward pushing stage of the conveying screw 12 and the anti-reverse end assembly 121, withstands high pressure and adheres in the reverse direction to prevent the semi-solid slurry from flowing back. It is a common structure in equipment such as screw conveyors and injection machines (this embodiment will not be explained in detail). The conveying pipe 11 is provided with a first heating element 13. The rotation drive unit 3 and the push-pull drive unit 4 are located at one end of the conveying pipe 11 near the feeding unit 2. The rotation drive unit 3 is used to drive the conveying screw 12 to rotate in the conveying pipe 11 (i.e., to perform screw conveying), and the push-pull drive unit 4 is used to drive the conveying screw 12 to move in the conveying pipe 11 (i.e., to push forward and pull backward).

[0022] Refer to the instruction manual appendix Figure 4 The discharge unit 5 includes a horizontal section 51 and an upward section 52. The horizontal section 51 is fixedly installed at the output end of the conveying pipe 11, that is, the end of the conveying pipe 11 away from the feeding unit 2. The top of the upward section 52 is provided with an output connecting pipe 53 on the side away from the pulping and conveying unit 1. The output connecting pipe 53 is used to connect with external equipment (such as molding equipment). For example, a corresponding connecting pipe is set to connect with the inner cavity of the mold to convey the molten slurry into the mold, or a funnel or other receiving structure is set on the mold to directly pour the slurry into the receiving structure. After it enters the mold, the mold is closed for molding processing.

[0023] A metering chamber 111 is formed in the area corresponding to the horizontal section 51 inside the conveying pipe 11 (i.e., the output end area of ​​the conveying pipe 11). That is, when the initial processing begins, the push-pull drive unit 4 controls the conveying screw 12 to retract. At this time, the area between the anti-reverse end assembly 121 and the horizontal section 51 forms the metering chamber 111 inherent in the conveying pipe 11. The sensing and detection unit 6 is set on the upturned section 52. The sensing and detection unit 6 includes a liquid level detection component 61. The liquid level detection component 61 is used to detect the liquid level of the slurry in the upturned section 52 to determine the specific amount of slurry that can be output. An end cap 54 is fixedly installed at the top of the upturned section 52, and the liquid level detection component 61 can be directly installed in the end cap 54.

[0024] It should be noted that the conveying pipe 11 provides guidance for the conveying of materials, while the first heating element 13 can be an electric heating structure such as an electric heating wire or a pipe-type electric heater, or other types of combined heating devices, used to heat the material inside the conveying pipe 11, so that the material gradually melts and forms a semi-solid shape. The first heating element 13 can be set in multiple groups, which are distributed along the length of the conveying pipe 11 and are wrapped around the outside of the conveying pipe 11, thereby forming independent zone control and zone heating. As for the liquid level detection component 61, existing commonly used sensor structures can be selected, such as liquid level detection probes (capacitive liquid level sensors), laser liquid level sensors, radar level gauges, or even visual detection probes, etc., which can be selected according to actual needs.

[0025] In the above scheme, magnesium alloy metal raw material particles are fed into the conveying pipe 11 through the feeding unit 2. At the same time, the first heating element 13 starts to operate, and the conveying screw 12 is driven to rotate by the rotation drive unit 3. Under the drive of the conveying screw 12, the metal raw material melts into a melt and continuously moves towards the metering chamber 111. During this process, the push-pull drive unit 4 pulls the conveying screw 12 at a uniform speed and slowly moves it away from the metering chamber 111. By controlling the pulling distance of the conveying screw 12, the volume of the metering chamber 111 can be controlled. After the metal raw material melts and is sheared by the conveying screw 12, it forms a slurry (paste-like fluid) required for mold forming in the metering chamber 111. Then the slurry continues to be conveyed forward and fills the horizontal section. When the liquid level detection component 61 detects that the slurry level in the buoyancy plug 62 has reached the specified value, the conveying screw 12 stops running, thus realizing quantitative manufacturing. Finally, the push-pull drive unit 4 pushes the conveying screw 12 forward, and with the help of the check ring of the check end component 121, pushes the slurry temporarily stored in the quantitative chamber 111 and in the horizontal section 51 and the upward section 52, so that the slurry in the upward section 52 overflows through the output connecting pipe 53. Then the slurry is conveyed to the external equipment through the output connecting pipe 53 (for example, poured into the die-casting mold, and pressed by the mold to form it), thereby realizing quantitative manufacturing and conveying. The amount of material manufactured and transported each time can be guaranteed without relying on human experience to judge, thereby improving the forming accuracy and quality of semi-solid magnesium alloy.

[0026] It should be noted that in the above embodiments, the traditional scheme of directly connecting the pulping system (mainly the screw conveyor structure) to the mold equipment has been changed. By selecting appropriate external equipment to connect to the output docking pipe 53, different production molds or other production equipment can be selected according to actual needs. This facilitates the cooperation of the pulping system with different external equipment and makes it easier to repair and maintain the pulping system. In particular, if the output interval of the pulp belt is long during actual processing, in order to avoid the influence of the external ambient temperature on the pulp in the horizontal section 51 and the upward section 52, please refer to the appendix of the instruction manual. Figure 5 Alternatively, corresponding insulation components 55 or second heating components 56 can be provided on the outside of both the horizontal section 51 and the upward section 52. If necessary, the two can be used simultaneously to form an insulation effect on the slurry in the horizontal section 51 and the upward section 52. The second heating component 56 can be the same heating device as the first heating component 13 and is insulated by the insulation component 55.

[0027] Although the size of the metering chamber 111 can be adjusted by changing the pull-back distance of the check valve assembly 121 in the above scheme, the above scheme mainly adopts direct injection into the mold structure (with the corresponding receiving funnel, or directly into the mold cavity). Therefore, in order to prevent excess slurry leakage, after one injection, it is necessary to ensure that the slurry level in the upturned section 52 recedes. That is, in actual use, the slurry level in the upturned section 52 fluctuates before the slurry is output. Therefore, by using the liquid level detection assembly 61 to detect the actual liquid level and controlling the pull-back distance of the check valve assembly 121, more accurate quantitative control of slurry injection can be ensured.

[0028] Furthermore, in the above scheme, refer to the appendix to the instruction manual. Figure 2 and Figure 3 The rotation drive unit 3 includes a first connecting rod 31, a sleeve shaft 32, and a fixed seat 33. The fixed seat 33 is fixedly installed on the same base as the material conveying pipe 11. The sleeve shaft 32 is rotatably installed in the fixed seat 33. The first connecting rod 31 is slidably installed in the sleeve shaft 32, and a guide structure (such as a sliding key or spline) is provided between the first connecting rod 31 and the sleeve shaft 32 to ensure that the sleeve shaft 32 can drive the first connecting rod 31 to rotate and to ensure that the sliding of the first connecting rod 31 in the sleeve shaft 32 is not affected. The first connecting rod 31 is fixedly connected to the conveying screw 12. The rotation drive unit 3 also includes a drive motor, which is connected to the sleeve shaft 32 through a transmission component such as a belt, thereby realizing the rotation drive of the conveying screw 12.

[0029] Meanwhile, the push-pull drive unit 4 includes a push driver 41, which preferably has a hydraulic cylinder structure. The push driver 41 is provided with an output shaft 42, which is connected to the first connecting rod 31 through a push-pull connection assembly 43. The push-pull connection assembly 43 is used to ensure that the output shaft 42 can push and pull the first connecting rod 31 while the first connecting rod 31 can rotate relative to the output shaft 42. Specifically, the push-pull connection assembly 43 includes a connecting sleeve 431 and a second connecting shaft 432. The connecting sleeve 431 is fixedly installed on the first connecting rod 31, and the second connecting shaft 432 is fixedly installed on the output shaft 42. The second connecting shaft 432 is rotatably installed inside the connecting sleeve 431, and the connecting sleeve 431 is provided with a limiting structure for laterally limiting the second connecting shaft 432 to prevent the second connecting shaft 432 from moving out of the connecting sleeve 431. In addition, corresponding bearing structures are provided between the second connecting shaft 432 and the connecting sleeve 431, and between the sleeve 32 and the fixed seat 33.

[0030] Specifically, the connecting sleeve 431 has an installation groove. The second connecting shaft 432 can be coaxially installed with the output shaft 42 via a coupling. The end of the second connecting shaft 432 located in the installation groove has a shoulder, which divides the installation groove into two sub-installation grooves. Both sub-installation grooves are equipped with bearings, which are installed on the second connecting shaft 432. The installation groove is equipped with a locking element for limiting the bearing, i.e., the aforementioned limiting structure for limiting the second connecting shaft 432. With this setting, the second connecting shaft 432 can remain independent and not rotate when the first connecting rod 31 rotates, avoiding the failure of the pusher driver 41 due to long-term rotation, thereby increasing the operational stability of the pulping system.

[0031] Furthermore, in the above-mentioned scheme, the pulping system can be adapted to more external devices and different processing technologies. Therefore, the specific output operation of the pulping system can be adjusted according to actual usage requirements. In some metal forming processes, in addition to the pressure provided by the mold itself during actual forming, a slurry injection pressure can be provided to fill the mold interior with slurry (if necessary, the melting effect of the alloy material needs to be improved, i.e., the fluidity of the slurry needs to be increased). To further adapt to such processing, this embodiment also makes the following improvements to the sensing detection unit 6 (i.e., the first improvement), as detailed in the appendix to the specification. Figure 5 and Figure 6The sensing and detection unit 6 also includes a buoyancy plug 62. The upturned section 52 is a straight tube structure, and the buoyancy plug 62 is slidably installed in the upturned section 52. The buoyancy plug 62 has buoyancy in the aforementioned magnesium alloy semi-solid slurry. For example, the buoyancy plug 62 is made of hollow metal. The output connecting pipe 53 is preferably made of horizontal structure, and a docking structure is provided on the output connecting pipe 53. This docking structure is used for direct sealing connection with external equipment (the slurry can still be directly output through the output connecting pipe 53 even when not docked). When docking, a corresponding sealing control structure (such as a dedicated high-temperature resistant valve structure) is also provided. The buoyancy plug 62 is equipped with... The end cap 54 is provided with an exhaust channel 621 that runs vertically through the vent. An exhaust docking channel 541 is provided on the end cap 54, and a venting connector 63 is connected to the exhaust docking channel 541. The area on the end cap 54 corresponding to the exhaust channel 621 is also provided with a sealing structure to seal the exhaust channel 621. Correspondingly, the liquid level detection component 61 is a distance measuring detector 611. The distance measuring detector 611 is used to detect the distance from the buoyancy plug 62 to the end cap 54 (e.g., a laser distance measuring sensor). Since the buoyancy of the buoyancy plug 62 in the slurry is fixed, the height of the slurry liquid level can be indirectly determined by judging the height of the buoyancy plug 62.

[0032] Specifically, in this embodiment, when the pulping system is used for the first time, or when it is used for the first grouting after being connected to different external equipment due to different processing needs, the slurry is first transported to the rising section 52 by the rotation of the conveying screw 12. After the buoyancy plug 62 comes into contact with the slurry, it floats upward with the slurry surface due to buoyancy. The presence of the venting channel 621 allows the air initially present below the buoyancy plug 62 to flow upward and be discharged through the venting docking channel 541 and the venting connecting pipe 63. After the slurry is metered by detecting the height of the buoyancy plug 62, the check valve assembly 121 is pushed forward to start outputting slurry and injecting it into the mold. During this process, the buoyancy plug 62 first rises with the slurry surface. When the output connector 53 is passed, the air originally in the output connector 53 will also be discharged outward through the exhaust docking channel 541 and the vent connector 63 (if necessary, the vent connector 63 can be connected to an air extraction device to accelerate the air discharge, and the relative height of the vent connector 63 and the buoyancy plug 62 after contacting the end cap 54 can be preset, for example, when the buoyancy plug 62 contacts the end cap 54, the bottom wall of the buoyancy plug 62 is exactly in the area above the vent connector 63). Finally, when the buoyancy plug 62 contacts the end cap 54, the sealing structure seals the exhaust channel 621, thus maintaining a complete seal in the upturned section 52. At this time, the check valve end assembly 121 can output the slurry under high pressure under the effective drive of the push driver 41, so that it is injected into the mold.

[0033] It should be noted that if there is a need to prevent material oxidation, the venting pipe 63 can be connected to a protective gas storage device, and protective gas can be pre-filled into the upturned section 52. The air in the above process will then become a protective gas and will not affect the slurry.

[0034] Furthermore, in the above scheme, the venting channel 621 can be a straight hole structure, set at the center of the buoyancy plug 62, and the sealing structure is a sealing plug 542. When the buoyancy plug 62 floats up to contact the end cap 54, the sealing plug 542 is inserted into the venting channel 621 to seal the venting channel 621 and prevent the slurry from overflowing.

[0035] Since the buoyancy plug 62 also needs to be in direct contact with the slurry, although the upward section 52 can also be heated by the second heating element 56, the buoyancy plug 62, floating within the upward section 52, is difficult to heat directly, and a certain temperature difference still exists between it and the slurry. When the slurry initially contacts the buoyancy plug 62, partial solidification of the slurry can easily occur, making it difficult for the buoyancy plug 62 to float. Therefore, this embodiment also makes the following improvement to the sensing detection unit 6 (second improvement), see the attached manual. Figure 7 and Figure 8 The upward-curving section 52 is a vertical structure (the main purpose of the upward-curving section 52 is to enable the slurry to move on the liquid surface; therefore, the upward-curving section 52 can be inclined or vertical. In order to provide a better floating environment for the buoyancy plug 62, a vertical structure is preferred for the upward-curving section 52 in this embodiment). A third heating element 64 is provided inside the buoyancy plug 62 (direct electric heating or heat carrier heating equipment can be selected according to actual needs). A conical boss 622 is provided on the top of the buoyancy plug 62. A guide slide rod 65 is fixedly installed on the top of 2. The guide slide rod 65 passes through the end cover 54 and slides with the end cover 54, so that the heating connector 641 of the third heating element 64 can extend to the outside of the upturned section 52 via the guide slide rod 65, thereby realizing effective heating control of the third heating element 64 (if the third heating element 64 is an electric heating type, the heating connector 641 is a corresponding cable structure; if the third heating element 64 is a heat carrier heater, the heating connector 641 is a corresponding high-temperature fluid delivery pipe).

[0036] Correspondingly, the liquid level detection component 61 uses a displacement detector 612, which is used to detect the movement distance of the guide slide rod 65 (e.g., a grating ruler / linear encoder, or a laser rangefinder sensor, but care must be taken not to affect the installation of the guide slide rod 65), thereby determining the height change of the buoyancy plug 62 and the specific liquid level of the slurry. The sealing structure on the end cap 54 is a conical groove 543, the shape of which is adapted to the conical boss 622. The exhaust channel 621 forms a branch hole 6211 extending to the side wall of the conical boss 622 in the conical boss 622. The exhaust docking channel 541 extends into the conical groove 543. When the buoyancy plug 62 rises to the point where the conical boss 622 is inserted into the conical groove 543, the branch hole 6211 is misaligned with the exhaust docking channel 541, thereby sealing the branch hole 6211 with the help of the conical groove 543.

[0037] Based on the above solution, in order to further improve the performance of the buoyancy plug 62, this embodiment also makes the following improvements to the buoyancy plug 62, as detailed in the appendix to the instruction manual. Figure 9 and Figure 10 A narrow flow section 6212 is provided in the middle of the venting channel 621. A thin-walled elastic tube 66 (a thin-walled metal structure with elastic deformation capability) is fixedly connected to the narrow flow section 6212. Although the buoyancy plug 62 can float in the slurry, some slurry will enter the venting channel 621 due to its gravity. By reasonably setting the buoyancy of the buoyancy plug 62, the shape of the venting channel 621, and the height of the thin-walled elastic tube 66, it can be ensured that when the buoyancy plug 62 floats in the slurry, the top of the slurry in the venting channel 621 is located below the middle of the thin-walled elastic tube 66. At the same time, the buoyancy plug 62 corresponds to the thin-walled... An inflation chamber 623 is provided on the outer periphery of the elastic tube 66. The inflation chamber 623 is connected to an inflation / deflation pipe 6231, which is used to input and output pressurized fluid into the inflation chamber 623. The temperature of the pressurized fluid is lower than the melting temperature of the slurry. Specifically, one inflation / deflation pipe 6231 can be provided. After the buoyancy plug 62 reaches the top and contacts the end cap 54, pressurized fluid (heated room temperature air, water, hydraulic oil, etc.) can be injected into the inflation chamber 623 to increase the internal pressure of the inflation chamber 623, thereby causing the thin-walled elastic tube 66 to undergo a slight inward contraction deformation. Refer to the attached instruction manual. Figure 11(The deformation shown in the illustration is for demonstration purposes; the actual deformation is not this significant.) The lower half of the space can form a cone structure. Simultaneously, since the temperature of the injected pressure fluid is lower than that of the slurry itself, a small portion of the slurry inside the thin-walled elastic tube 66 can solidify. At this time, the lower half of the thin-walled elastic tube 66 is cone-shaped, and the solidified small portion of slurry forms a sealing block, mutually sealing with the thin-walled elastic tube 66. This further prevents the slurry from flowing into the space above the venting channel 621 during output. When the buoyancy plug 62 needs to descend during subsequent use, the pressure inside the inflation chamber 623 can be released first, allowing the thin-walled elastic tube 66 to return to normal. At this time, the previously solidified small piece of slurry can fall downwards and re-integrate into the slurry.

[0038] It should be noted that the purpose of controlling the temperature of the pressure fluid is to appropriately cool the slurry material inside the thin-walled elastic tube 66 after deformation, so that a small portion of it solidifies within the narrow space after deformation, forming a fixed plug. This plug actively seals the branch hole 6211 with the help of the material itself. Therefore, for the temperature control of the pressure fluid, it is sufficient to achieve the above effect. The temperature does not need to be too low to avoid an excessively large solidification range and subsequent poor melting. In order to facilitate control and continuously maintain the temperature inside the thin-walled elastic tube 66 below the melting temperature of the slurry, the inflation / deflation pipe 6231 can be a double pipe, one for input and one for output. The pressure difference between the input and output can be adjusted by a corresponding control valve to maintain the pressure inside the inflation / deflation pipe 6231.

[0039] Furthermore, for processing techniques requiring long-term, large-volume grouting, where the buoyancy plug 62 hardly descends during the process, this embodiment provides the following solution to further prevent the grout on the bottom surface of the buoyancy plug 62 from solidifying. Specifically, a rotating sleeve 651 is rotatably mounted on the top of the end cap 54. The rotating sleeve 651 slides in conjunction with the guide rod 65. The rotating sleeve 651 contains a guide structure for guiding the sliding of the guide rod 65, such as a corresponding sliding key or other sliding guide structure. The rotating sleeve 651 is driven by a motor and a gear structure to rotate, thereby driving the guide rod 65 and the buoyancy plug 62 to rotate. The rotation control of the buoyancy plug 62 requires reciprocating rotation control, not continuous rotation. At the same time, the bottom wall of the buoyancy plug 62 is set as an inclined surface structure. Thus, in actual use, by driving the buoyancy plug 62 to rotate reciprocally, the grout near the bottom wall of the buoyancy plug 62 is driven to flow by its inclined bottom surface, which can further prevent the risk of grout solidification at this point.

[0040] It should be noted that the thin-walled elastic tube 66 is a certain distance from the bottom of the buoyancy plug 62, and the space of the thin-walled elastic tube 66 is small and it is in direct contact with the pressure fluid in the air chamber 623. Therefore, the solidification of a small amount of slurry inside the thin-walled elastic tube 66 is not affected by the rotation of the buoyancy plug 62 (the temperature of the pressure fluid can be further reduced if necessary).

[0041] Refer to the instruction manual appendix Figure 12 This embodiment also provides a method for controlling the preparation of semi-solid magnesium alloy slurry in a split configuration, including the following steps: Step 1: Magnesium alloy metal raw material particles are fed into the conveying pipe 11 through the feeding unit 2, and at the same time, the first heating element 13 starts to operate; Step 2: The rotating drive unit 3 drives the conveying screw 12 to rotate, so that the metal raw material gradually melts and moves continuously into the metering chamber 111 to form a slurry. At the same time, the push-pull drive unit 4 controls the conveying screw 12 to pull back, adjusting and controlling the volume of the metering chamber 111. Step 3: The rotation drive unit 3 continues to drive the conveying screw 12 to rotate, controlling the metal raw materials and slurry to continue to be conveyed and fill the horizontal section 51 and the upward section 52; Step 4: The slurry level in the buoyancy plug 62 is detected by the liquid level detection component 61. When the slurry level reaches the specified value, the conveying screw 12 stops rotating. Step 5: The push-pull drive unit 4 controls the conveying screw 12 to push forward, and through the anti-reverse end assembly 121, it pushes the slurry temporarily stored in the quantitative chamber 111, as well as in the horizontal section 51 and the upward section 52, to flow, so that the slurry in the upward section 52 overflows through the output connector 53 and flows out, thus completing the slurry output.

[0042] It should be noted that the specified value in step four above refers to the amount of slurry that is pushed to flow by the check valve assembly 121 and overflows from the output connector 53 after the height of the slurry liquid level in the upturned section 52 is detected to be the preset slurry output amount, so as to meet the processing requirements.

[0043] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A split-type magnesium alloy semi-solid pulping system, characterized in that, It includes a pulping and conveying unit (1), a feeding unit (2), a rotation drive unit (3), a push-pull drive unit (4), a discharge unit (5), and a sensing and detection unit (6). The pulping and conveying unit (1) includes a conveying pipe (11), a conveying screw (12) is provided inside the conveying pipe (11), the rotation drive unit (3) is used to drive the conveying screw (12) to rotate, and the push-pull drive unit (4) is used to drive the conveying screw (12) to move. The discharge unit (5) includes a horizontal section (51) and an upward section (52). The horizontal section (51) is fixedly installed at the output end of the conveying pipe (11). An output connecting pipe (53) is provided on the side of the top of the upward section (52) away from the pulping and conveying unit (1). The sensing and detection unit (6) is disposed on the upturned section (52). The sensing and detection unit (6) includes a liquid level detection component (61). The liquid level detection component (61) is used to detect the liquid level of the slurry in the upturned section (52). An end cap (54) is fixedly installed at the top of the upturned section (52). The liquid level detection component (61) is installed in the end cap (54).

2. The split-type magnesium alloy semi-solid pulping system according to claim 1, characterized in that, The feeding unit (2) is located above the input end of the conveying pipe (11). The rotation drive unit (3) and the push-pull drive unit (4) are located at one end of the conveying pipe (11) near the feeding unit (2). The end of the conveying screw (12) away from the feeding unit (2) is provided with a check valve end assembly (121). A metering chamber (111) is formed in the area corresponding to the horizontal section (51) inside the conveying pipe (11). A first heating element (13) is provided on the outside of the conveying pipe (11). Corresponding heat insulation elements (55) and second heating elements (56) are provided on the outside of the horizontal section (51) and the upward section (52).

3. The split-type magnesium alloy semi-solid pulping system according to claim 2, characterized in that, The rotation drive unit (3) includes a first connecting rod (31), a sleeve shaft (32), and a fixed seat (33). The fixed seat (33) is fixedly installed on the same base as the material conveying pipe (11). The sleeve shaft (32) is rotatably installed in the fixed seat (33). The first connecting rod (31) is slidably installed in the sleeve shaft (32) and a guide structure is provided between it and the sleeve shaft (32). The first connecting rod (31) is fixedly connected to the conveying screw (12). The rotation drive unit (3) also includes a drive motor, which is connected to the sleeve shaft (32) through a transmission.

4. The split-type magnesium alloy semi-solid pulping system according to claim 3, characterized in that, The push-pull drive unit (4) includes a push driver (41), which is provided with an output shaft (42). The output shaft (42) is connected to the first connecting rod (31) through a push-pull connection assembly (43). The push-pull connection assembly (43) includes a connecting sleeve (431) and a second connecting shaft (432). The connecting sleeve (431) is fixedly installed on the first connecting rod (31), and the second connecting shaft (432) is fixedly installed on the output shaft (42). The second connecting shaft (432) is rotatably installed inside the connecting sleeve (431), and the connecting sleeve (431) is provided with a limiting structure for laterally limiting the second connecting shaft (432).

5. The split-type magnesium alloy semi-solid pulping system according to claim 4, characterized in that, The sensing and detection unit (6) also includes a buoyancy plug (62). The upturned section (52) is a straight pipe structure. The buoyancy plug (62) is slidably installed in the upturned section (52). The buoyancy plug (62) has buoyancy in the slurry. The output connecting pipe (53) is a horizontal structure and has a docking structure. The buoyancy plug (62) has an exhaust channel (621). The end cap (54) has an exhaust docking channel (541). The exhaust docking channel (541) is connected to the ventilation connecting pipe (63). The area on the end cap (54) corresponding to the exhaust channel (621) also has a sealing structure to block the exhaust channel (621).

6. The split-type magnesium alloy semi-solid pulping system according to claim 5, characterized in that, The vent channel (621) is a straight hole structure, the sealing structure is a sealing plug (542), the sealing plug (542) is adapted to the top of the vent channel (621), the liquid level detection component (61) is a distance measuring detector (611), the distance measuring detector (611) is used to detect the distance from the buoyancy plug (62) to the end cap (54).

7. The split-type magnesium alloy semi-solid pulping system according to claim 5, characterized in that, The buoyancy plug (62) is internally equipped with a third heating element (64). The top of the buoyancy plug (62) is provided with a conical boss (622). A guide slide rod (65) is fixedly installed on the top of the conical boss (622). The guide slide rod (65) extends upward through the end cap (54) and slides with the end cap (54). The liquid level detection component (61) is a displacement detector (612). The sealing structure on the end cap (54) is a conical groove (543). The shape of the conical groove (543) is adapted to the conical boss (622). The exhaust channel (621) has a branch hole (6211) extending to the side wall of the conical boss (622) in the conical boss (622). The exhaust docking channel (541) extends into the conical groove (543). When the buoyancy plug (62) rises to the point where the conical boss (622) is inserted into the conical groove (543), the branch hole (6211) is misaligned with the exhaust docking channel (541).

8. The split-type magnesium alloy semi-solid pulping system according to claim 7, characterized in that, A narrow flow section (6212) is provided in the middle of the venting channel (621), and a thin-walled elastic tube (66) is fixedly connected to the narrow flow section (6212). When the buoyancy plug (62) floats in the slurry, the top of the slurry in the venting channel (621) is located below the middle of the thin-walled elastic tube (66). An air filling chamber (623) is provided in the area corresponding to the outer periphery of the thin-walled elastic tube (66) inside the buoyancy plug (62). The air filling chamber (623) is connected to an air filling and defilling pipe (6231). The air filling and defilling pipe (6231) is used to input and output pressure fluid into the air filling chamber (623), and the temperature of the pressure fluid is lower than the melting temperature of the slurry.

9. The split-type magnesium alloy semi-solid pulping system according to claim 8, characterized in that, The top of the end cap (54) is rotatably mounted with a rotating sleeve (651), which is slidably engaged with the guide rod (65). The rotating sleeve (651) is provided with a guide structure for guiding the sliding of the guide rod (65). The rotating sleeve (651) is driven by a motor and rotates back and forth. The bottom wall of the buoyancy plug (62) is set as an inclined surface structure.

10. The control method for the split-type magnesium alloy semi-solid pulping system as described in claim 9, characterized in that, Includes the following steps: Step 1: Magnesium alloy metal raw material particles are fed into the conveying pipe (11) through the feeding unit (2), and at the same time the first heating element (13) starts to run; Step 2: The rotating drive unit (3) drives the conveying screw (12) to rotate, so that the metal raw material gradually melts and moves continuously into the quantitative chamber (111) to form a slurry. At the same time, the push-pull drive unit (4) controls the conveying screw (12) to pull back, and adjusts the volume of the quantitative chamber (111). Step 3: The rotating drive unit (3) continues to drive the conveying screw (12) to rotate, control the metal raw materials and slurry to continue to be conveyed, and fill the horizontal section (51) and the upward section (52). Step 4: The slurry level in the buoyancy plug (62) is detected by the liquid level detection component (61). When the slurry level reaches the specified value, the conveying screw (12) stops rotating. Step 5: The push-pull drive unit (4) controls the conveying screw (12) to push forward, and through the anti-reverse end assembly (121), the slurry temporarily stored in the quantitative chamber (111) and the horizontal section (51) and the upward section (52) is pushed to flow, so that the slurry in the upward section (52) overflows through the output connector (53) and flows out, thus completing the slurry output.

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