A device for detecting and sampling aluminum melt

Abstract

The application discloses an aluminum melt detection sampling device and relates to the technical field of sampling equipment. The technical key points of the aluminum melt detection sampling device comprise a sampling cylinder, a mounting groove is formed in the bottom of the sampling cylinder, a bottom cover matched with the sampling cylinder is threadedly connected in the inner cavity of the mounting groove, a liquid inlet hole in communication with the inner cavity of the sampling cylinder is formed in the center of the bottom of the bottom cover, a suction structure is arranged on the sampling cylinder, the suction structure comprises a suction disc, a straight push rod penetrating through the sampling cylinder and being in sliding connection with the sampling cylinder is fixedly installed on the suction disc, the liquid inlet hole is blocked by the sliding sealing suction disc, the aluminum melt surface layer impurities are isolated from the source to ensure the sample representativeness, meanwhile, the suction disc cooperates with the straight push rod, a rotating rod and other components to convert the rotary motion into the linear motion, the sampling depth and sampling amount can be controlled to improve the detection result reliability, the auxiliary demolding can be completed by bidirectional sliding and downward pushing of the suction disc, and the sampling operation efficiency and convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of sampling equipment technology, specifically to an aluminum melt detection and sampling device. Background Technology

[0002] In the entire production process of aluminum and aluminum alloy smelting, refining, and static heat preservation, in order to accurately control the quality of the melt and ensure the mechanical properties and service stability of the final product, it is necessary to verify key indicators such as chemical composition, inclusion content, and hydrogen content through rapid pre-furnace testing. Obtaining representative aluminum melt samples without secondary contamination is the core prerequisite for ensuring the authenticity and accuracy of test results. At present, the industry generally uses handheld open sampling spoons as the core sampling tool for routine pre-furnace sampling operations. These tools have become the mainstream sampling tools in small and medium-sized smelting production lines and conventional grade aluminum alloy production due to their easy maintenance and strong adaptability to different scenarios.

[0003] However, in actual sampling, this type of open-type sampling spoon is very prone to scooping in impurities such as alumina inclusions generated by high-temperature oxidation on the surface of the aluminum melt and floating slag suspended after refining. As a result, the obtained sample cannot truly reflect the actual composition and purity of the aluminum melt in the furnace. Therefore, we propose a new type of aluminum melt detection and sampling device. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an aluminum melt detection and sampling device that can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an aluminum melt detection and sampling device, comprising a sampling cylinder, wherein an installation groove is provided at the bottom of the sampling cylinder, and a bottom cover adapted to the sampling cylinder is threadedly connected to the inner cavity of the installation groove, wherein a liquid inlet hole communicating with the inner cavity of the sampling cylinder is provided at the center of the bottom of the bottom cover, and a suction structure is provided on the sampling cylinder.

[0006] The suction structure includes a suction disk, on which a straight push rod is fixedly installed, penetrating the sampling cylinder and slidably connected. The end of the straight push rod away from the suction disk is fixedly connected to a rotating rod via a rotary joint, and the rotating rod has a threaded groove.

[0007] Preferably, the suction cup is adapted to the sampling cylinder, and the suction cup and the sampling cylinder are slidably and sealingly connected.

[0008] Preferably, the inner cavities of the push rod, the rotary joint, and the threaded groove are interconnected; the end of the push rod connected to the suction cup is provided with an exhaust hole, which is connected to the inner cavity of the push rod.

[0009] Preferably, an outer shell is fixedly installed at the center of the top of the sampling tube, and sliding guide rails are symmetrically installed inside the outer shell; sliders that are slidably connected to the sliding guide rails are symmetrically installed on the outer side of the straight push rod.

[0010] Preferably, the rotary joint is fixedly installed on the inner wall of the outer casing, and both ends of the rotary joint are fixedly connected to the end of the straight push rod and the end of the rotating rod, respectively. The rotary joint is located at the connection node between the straight push rod and the rotating rod.

[0011] Preferably, a threaded block is fixedly connected to the top end face of the outer casing, and the internal thread of the threaded block is threadedly engaged with the threaded groove on the rotating rod.

[0012] Preferably, the end of the rotating rod away from the rotary joint moves upward and sequentially through the outer shell and the threaded block, wherein a rotating handle is fixedly installed at the top of both the threaded block and the top of the rotating rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting up a suction cup that is slidably and sealed to the sampling cylinder, and ensuring that it is tightly fitted to the bottom cover to block the liquid inlet before sampling, it is possible to prevent impurities such as alumina inclusions and refining slag on the surface of the aluminum melt from entering the sampling cylinder from the source. This ensures that the sample taken truly reflects the actual composition and purity of the deep aluminum melt in the furnace, effectively solving the problems of existing open sampling spoons being prone to mixing in surface impurities and lacking representativeness of the sample.

[0015] 2. By setting up a suction cup in conjunction with a straight push rod, a rotating rod, and a threaded block, the rotational motion of the thread is converted into linear motion, thereby controlling the lifting speed and stroke of the suction cup. This allows for the stable extraction of deep aluminum melt of different depths and volumes according to testing requirements.

[0016] 3. By setting the suction cup to slide bidirectionally inside the sampling cylinder, after the aluminum melt solidifies, the suction cup can be driven to move downward by reverse rotation, applying a uniform thrust to the formed cylindrical sample to complete the demolding, thereby improving sampling efficiency and ease of operation. Attached Figure Description

[0017] Figure 1 This is a complete structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the liquid inlet hole of the present invention;

[0019] Figure 3 For the present invention Figure 1 A partially enlarged structural diagram;

[0020] Figure 4 For the present invention Figure 1A partial cross-sectional structural diagram;

[0021] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A above;

[0022] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B above;

[0023] Figure 7 For the present invention Figure 4 Enlarged structural diagram at point C;

[0024] Figure 8 For the present invention Figure 4 A magnified structural diagram of point D above.

[0025] In the picture:

[0026] 1. Sampling cylinder; 2. Mounting groove; 3. Bottom cover; 4. Liquid inlet; 5. Suction structure; 51. Suction plate; 52. Straight push rod; 53. Rotary joint; 54. Rotating rod; 55. Threaded groove; 6. Vent hole; 7. Outer shell; 8. Sliding guide rail; 9. Slider; 10. Threaded block; 11. Rotating handle. Detailed Implementation

[0027] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0028] This invention provides a technical solution:

[0029] Please see Figures 1 to 8 An aluminum melt detection and sampling device includes a sampling cylinder 1, an installation groove 2 at the bottom of the sampling cylinder 1, a bottom cover 3 adapted to the sampling cylinder 1 being threadedly connected to the inner cavity of the installation groove 2, an inlet hole 4 communicating with the inner cavity of the sampling cylinder 1 at the center of the bottom of the bottom cover 3, and a suction structure 5 on the sampling cylinder 1.

[0030] The suction structure 5 includes a suction cup 51, which is adapted to the sampling cylinder 1 and is slidably and sealingly connected to the sampling cylinder 1. A straight push rod 52 that passes through the sampling cylinder 1 and is slidably connected to the sampling cylinder 1 is fixedly installed on the suction cup 51. A rotating rod 54 is fixedly connected to the end of the straight push rod 52 away from the suction cup 51 through a rotary joint 53. A threaded groove 55 is provided on the rotating rod 54.

[0031] The working process of the suction structure 5: Before sampling, the suction cup 51 is fitted with the bottom cover 3 to seal the liquid inlet hole 4. During sampling, the rotating rod 54 is rotated, which, through the coordinated action of the rotating joint 53, the sliding guide rail 8 and the slider 9, converts the rotational motion into the linear motion of the straight push rod 52, driving the suction cup 51 to move upward along the inner wall of the sampling cylinder 1 to form a negative pressure to extract the aluminum melt. During demolding, the rotating rod 54 is rotated in the opposite direction, and the straight push rod 52 pushes the suction cup 51 downward to push out the solidified sample. Through the sliding seal of the suction cup 51 and the transmission of each component, impurity isolation and negative pressure extraction of aluminum melt at a specified depth are achieved. The thrust of the suction cup 51 can also be used to complete the sample demolding. The threaded groove 55 of the rotating rod 54 provides a basis for transmission and motion adjustment, ensuring the purity, controllability and convenience of sampling and demolding.

[0032] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 The inner cavities of the push rod 52, the rotary joint 53, and the threaded groove 55 are interconnected; the push rod 52 is provided with an exhaust hole 6 at the connection end with the suction cup 51, and the exhaust hole 6 is connected to the inner cavity of the push rod 52.

[0033] When the suction cup 51 slides upward along the inner wall of the sampling cylinder 1, the air on the side near the outer shell cylinder 7 will enter the inner cavity of the straight push rod 52 through the exhaust hole 6, and then be discharged to the outside through the inner cavity of the rotary joint 53 and the threaded groove 55 in sequence. The function of this structure is to promptly discharge the air generated by the upward movement of the suction cup 51 in the sampling cylinder 1, ensure that the suction cup 51 can slide smoothly, and ensure that a stable negative pressure environment can be formed in the sampling cylinder 1, so as to successfully complete the extraction operation of deep aluminum molten material.

[0034] Please see Figures 1 to 7 A housing 7 is fixedly installed at the center of the top of the sampling cylinder 1. Sliding guide rails 8 are symmetrically installed inside the housing 7. Sliding sliders 9, which are slidably connected to the sliding guide rails 8, are symmetrically installed on the outside of the straight push rod 52.

[0035] The outer shell 7, fixed at the top of the sampling cylinder 1, provides a base for the installation and protection of the internal transmission components. The sliding guide rail 8 in its inner cavity is adapted to the slider 9 on the outside of the straight push rod 52. When the rotating rod 54 rotates and drives the straight push rod 52 to move, the slider 9 slides vertically along the sliding guide rail 8, providing guidance and limiting for the movement of the straight push rod 52. The outer shell 7 fixes and protects the rotating joint 53, the sliding guide rail 8 and other components. At the same time, the cooperation between the sliding guide rail 8 and the slider 9 can stably convert the rotational motion of the rotating rod 54 into the vertical linear motion of the straight push rod 52, preventing the straight push rod 52 from deviating during movement, ensuring the smoothness of the suction cup 51 sliding along the inner wall of the sampling cylinder 1, and thus ensuring the stability of the negative pressure formed in the sampling cylinder 1 and the uniformity of the demolding thrust.

[0036] In some embodiments, the rotary joint 53 is fixedly installed on the inner wall of the outer casing 7, and the two ends of the rotary joint 53 are fixedly connected to the end of the straight push rod 52 and the end of the rotating rod 54, respectively. The rotary joint 53 is located at the connection node between the straight push rod 52 and the rotating rod 54.

[0037] In this embodiment, when the rotating rod 54 is rotated, the rotary joint 53 converts the rotational motion of the rotating rod 54 into the vertical linear motion of the straight push rod 52, while maintaining the communication between the inner cavities of the straight push rod 52 and the rotating rod 54. The function of this structure is to achieve a stable connection between the rotational motion and the linear motion, ensure the smooth transmission of the suction structure 5, and ensure that the air in the inner cavity of the straight push rod 52 can smoothly pass through the rotary joint 53 into the inner cavity of the threaded groove 55 for discharge. It also plays a role in fixing the connection between the straight push rod 52 and the rotating rod 54.

[0038] In some embodiments, a threaded block 10 is fixedly connected to the top end face of the outer casing 7, and the internal thread of the threaded block 10 is threadedly engaged with the threaded groove 55 on the rotating rod 54.

[0039] In this embodiment, the threaded block 10 is fixed to the top of the outer shell cylinder 7 and its internal thread engages with the threaded groove 55 of the rotating rod 54. During sampling and demolding operations, rotating the rotating rod 54 will convert the rotational motion of the rotating rod 54 into its own vertical up-and-down movement through the threaded engagement of the threaded block 10 and the threaded groove 55. This will drive the straight push rod 52 and the suction cup 51 to move vertically in sync. This achieves a precise conversion from rotational motion to linear motion. At the same time, the characteristics of the threaded engagement can be used to precisely control the travel and speed of the rotating rod 54, thereby adjusting the upward movement distance of the suction cup 51 to control the negative pressure and sampling amount in the sampling cylinder 1. It can also control the downward thrust and distance of the suction cup 51, ensuring the smoothness of demolding.

[0040] Please see Figures 1-5 The end of the rotating rod 54 away from the rotating joint 53 moves upward and passes through the outer shell cylinder 7 and the threaded block 10 in sequence. The top of the threaded block 10 and the top of the rotating rod 54 are both fixedly installed with a rotating handle 11.

[0041] During sampling and demolding, one hand holds the rotating handle 11 fixing device on the threaded block 10, while the other hand rotates the rotating handle 11 on the rotating rod 54, causing the rotating rod 54 to rotate and move vertically, thereby pulling the straight push rod 52 and the suction cup 51 to make corresponding vertical movements. The function of this structure is to allow the rotation and movement of the rotating rod 54 to be free from the spatial restrictions of the outer shell 7 and the threaded block 10. The design of the double rotating handle 11 realizes the division of labor between the two hands for fixing the device and rotating the operation, making the rotation of the rotating rod 54 more effortless, stable and precise, and better controlling the movement stroke of the suction cup 51, ensuring the smooth progress of sampling and demolding operations. At the same time, the rotating handle 11 also increases the operating contact area, improving the operational safety during high-temperature operations.

[0042] In practical use, the working principle of this invention is as follows:

[0043] When sampling aluminum molten material before furnace inspection, the bottom cover 3 is first threadedly connected to the bottom of the sampling cylinder 1 via the mounting groove 2. Both threads are located inside the sampling cylinder 1, effectively preventing direct contact between the threads and the high-temperature aluminum molten material, thus avoiding adhesion or damage. This ensures the bottom cover 3 can be easily screwed and disassembled. A sealing gasket can be added at the connection between the sampling cylinder 1 and the bottom cover 3 to further improve the sealing, preventing molten metal from entering the threads and causing adhesion, ensuring smooth disassembly. Before sampling, the device is kept in its initial state, with the suction cup 51 tightly fitted to the bottom cover 3, completely sealing the inlet hole 4. This prevents impurities such as alumina inclusions and refining slag on the surface of the aluminum molten material from entering the sampling cylinder 1 through the inlet hole 4 during sampling, solving the problems of traditional open sampling spoons easily introducing surface impurities and lacking representativeness of the sample.

[0044] After completing the preliminary preparations, the sampling tube 1 is vertically and slowly inserted into the aluminum molten metal smelting tank. Because the liquid inlet hole 4 is always blocked, various slag impurities on the upper layer of the smelting tank cannot enter the sampling tube 1. After the bottom of the sampling tube 1 is inserted to the specified depth of the aluminum molten metal in the furnace (different depths of sampling can be achieved by inserting the sampling tube 1 into the aluminum molten metal; specifically, a scale can be engraved on the outside of the sampling tube 1, and the sampling equipment can be installed next to the furnace with the help of other lifting tools. The lifting equipment is controlled to lift and lower by a specified length, and the position of the scale submerged in the molten metal is observed in conjunction with the scale on the sampling tube 1. This scale is the sampling depth of the sampling equipment), the insertion operation is stopped to ensure that the aluminum molten metal extracted is deep in the furnace and uncontaminated. At this time, one hand holds the rotating handle 11 fixing device at the top of the outer shell cylinder 7, and the other hand rotates the rotating handle 11 at the top of the rotating rod 54. The threaded groove 55 on the rotating rod 54 and the threaded block 10 are adapted to each other. During the rotation, the rotating rod 54 moves upward. Under the dual action of the rotating joint 53 for turning connection and the guiding and limiting action of the sliding guide rail 8 and the slider 9, the rotational motion of the rotating rod 54 is stably converted into the vertical linear motion of the straight push rod 52. The straight push rod 52 is pulled upward and drives the suction cup 51 to slide upward along the inner wall of the sampling cylinder 1. The air inside the suction cup 51 near the outer shell cylinder 7 will be discharged from the exhaust hole 6 and will pass through the inner cavity of the straight push rod 52, the rotating joint 53 and the rotating rod 54 in sequence and finally discharged to the outside, ensuring the smooth sliding of the suction cup 51. The upward movement of the suction cup 51 creates a stable negative pressure inside the sampling cylinder 1. Pure aluminum melt at a specified depth inside the furnace is then drawn into the sampling cylinder 1 from the liquid inlet 4 under the action of the negative pressure. When the amount of aluminum melt extracted reaches the specified amount required for testing, the rotating rod 54 is stopped, and the extraction of aluminum melt is completed. A portion of the space inside the sampling cylinder 1 must be left unfilled to allow sufficient operating margin for the subsequent disassembly of the bottom cover 3 and to prevent aluminum melt from overflowing.

[0045] The sampling device is then removed from the smelting vessel. Using a rack or clamp, the sampling device is kept vertically upside down (when manually upside down, protective measures should be taken to avoid burns). The inlet hole 4 is vertically upward. Hold the rotating handle 11 on the outer shell 7 with one hand and rotate the rotating handle 11 on the rotating rod 54 with the other hand. This allows the suction plate 51 to continue moving towards the threaded block 10, causing the aluminum molten material in the sampling cylinder 1 to move synchronously. This allows the aluminum molten material to completely detach from the area where the bottom cover 3 is located and enter the main cavity of the sampling cylinder 1. The aluminum molten material is kept at a safe distance from the bottom cover 3 to prevent it from overflowing or sticking to the bottom cover 3 when it is subsequently disassembled.

[0046] Then, using a special tool, the bottom cover 3 is screwed off and removed from the bottom of the sampling cylinder 1. This operation effectively prevents the high-temperature aluminum molten material from sticking to the bottom cover 3 after it begins to solidify as the temperature decreases, thus preventing difficulties in subsequent disassembly and further ensuring the convenience of post-sampling operations. After removing the bottom cover 3, the sampling device is kept in an inverted position and left to stand for a period of time to allow the aluminum molten material in the sampling cylinder 1 to cool and solidify naturally, forming a cylindrical sample that fits the inner cavity of the sampling cylinder 1 (when testing this cylindrical sample, it needs to be ground in advance to remove the oxide on the outside). The inner walls of both the sampling cylinder 1 and the bottom cover 3 are pre-coated with an anti-adhesion coating, which can effectively reduce the adhesion force between the aluminum molten material and the cylinder wall and the bottom cover 3 after solidification, providing convenience for subsequent demolding operations.

[0047] After the sample has completely solidified, remove the sampling device from the rack or clamp. Hold the rotating handle 11 on the outer shell 7 with one hand, and rotate the rotating handle 11 of the rotating rod 54 in the opposite direction with the other hand. This causes the straight push rod 52 to move the suction cup 51 vertically downward. The suction cup 51 exerts a uniform downward force on the solidified cylindrical sample, smoothly pushing the sample out of the sampling cylinder 1, completing the assisted demolding operation. The entire device, including the outer shell 7, straight push rod 52, rotating rod 54, and rotating handle 11, is made of high-temperature resistant heat-insulating materials. Specific materials such as aluminum silicate fiber composite materials and high-temperature resistant polyimide plastics can be used. These materials effectively insulate against the high temperature of the molten aluminum, preventing operators from being burned by high temperatures during the sampling and demolding process. They also prevent the device from deforming or being damaged due to prolonged contact with the high-temperature molten aluminum, ensuring the structural stability and service life of the device.

[0048] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. An aluminum melt detection and sampling device, comprising a sampling cylinder (1), wherein a mounting groove (2) is provided at the bottom of the sampling cylinder (1), and a bottom cover (3) adapted to the sampling cylinder (1) is threadedly connected to the inner cavity of the mounting groove (2), and a liquid inlet hole (4) communicating with the inner cavity of the sampling cylinder (1) is provided at the center of the bottom of the bottom cover (3), characterized in that: The sampling tube (1) is provided with a suction structure (5); The suction structure (5) includes a suction plate (51), on which a straight push rod (52) is fixedly installed and slides through the sampling cylinder (1). The end of the straight push rod (52) away from the suction plate (51) is fixedly connected to a rotating rod (54) through a rotary joint (53). The rotating rod (54) has a threaded groove (55).

2. The aluminum melt detection and sampling device according to claim 1, characterized in that: The suction cup (51) is adapted to the sampling cylinder (1), and the suction cup (51) and the sampling cylinder (1) are slidably and sealingly connected.

3. The aluminum melt detection and sampling device according to claim 1, characterized in that: The inner cavities of the straight push rod (52), the rotary joint (53) and the threaded groove (55) are interconnected; the connection end of the straight push rod (52) and the suction cup (51) is provided with an exhaust hole (6), and the exhaust hole (6) is connected to the inner cavity of the straight push rod (52).

4. The aluminum melt detection and sampling device according to claim 1, characterized in that: A housing cylinder (7) is fixedly installed at the center of the top of the sampling cylinder (1), and sliding guide rails (8) are symmetrically installed in the inner cavity of the housing cylinder (7); sliders (9) that are slidably connected to the sliding guide rails (8) are symmetrically installed on the outer side of the straight push rod (52).

5. The aluminum melt detection and sampling device according to claim 4, characterized in that: The rotary joint (53) is fixedly installed on the inner wall of the outer shell cylinder (7), and the two ends of the rotary joint (53) are fixedly connected to the end of the straight push rod (52) and the end of the rotating rod (54) respectively. The rotary joint (53) is located at the connection node between the straight push rod (52) and the rotating rod (54).

6. The aluminum melt detection and sampling device according to claim 4, characterized in that: A threaded block (10) is fixedly connected to the top end face of the outer shell (7), and the internal thread of the threaded block (10) is threadedly connected to the threaded groove (55) on the rotating rod (54).

7. The aluminum melt detection and sampling device according to claim 6, characterized in that: The end of the rotating rod (54) away from the rotating joint (53) moves upward and passes through the outer shell (7) and the threaded block (10) in sequence, wherein the top of the threaded block (10) and the rotating rod (54) are both fixedly installed with a rotating handle (11).

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