Vacuum directional solidification furnace with segmented sampling device

Abstract

This invention discloses a vacuum directional solidification forming furnace with a segmented sampling device, relating to the field of directional solidification forming furnace technology. The invention includes a processing table, on top of which a solidification furnace is fixed. A crucible pouring assembly and a sampling device are disposed on top of the solidification furnace. The sampling device includes two electrically operated lifting rods fixed to the top of the solidification furnace, a geometric frame fixed between the tops of the two lifting rods, an electrically operated push rod fixed to the top of the geometric frame, and a sampling cylinder fixed to the bottom of the geometric frame. The outer wall of the sampling cylinder has several sampling chambers, which are staggered vertically. Through the design of the sampling device and the coordination of the electrically operated lifting rods and push rods, this invention can precisely control the depth and position of the sampling cylinder and sampling chambers entering the crucible, thereby ensuring sampling accuracy. This helps to obtain metal samples from different layers within the crucible, improving the representativeness of the detection.

Description

Technical Field

[0001] This invention relates to the field of directional solidification molding furnace technology, specifically a vacuum directional solidification molding furnace with a segmented sampling device. Background Technology

[0002] A directional solidification furnace is a type of equipment used for precision casting of metallic materials. By controlling the solidification direction of molten metal, it enables directional grain growth, thereby improving the mechanical properties and high-temperature resistance of the material. It is commonly used in the manufacture of aerospace and high-performance turbine blades.

[0003] Chinese Patent Publication No. CN218627728U discloses a vacuum directional solidification furnace, relating to the field of solidification furnace technology. This invention includes a medium-frequency power supply, a first lifting device connected to the medium-frequency power supply, and a frame. A furnace body is mounted on the upper side of the frame, and a graphite crucible is installed inside the furnace body. The output end of the first lifting device is installed at the bottom of the graphite crucible. A second lifting device is mounted on the furnace body, and a furnace cover is mounted on the output end of the second lifting device. An infrared thermometer is mounted on the furnace cover. A vacuum system is connected to the furnace body, facilitating the detection of the temperature inside the graphite crucible using the infrared thermometer. This invention, through the inclusion of a first lifting device, reduces the need for a tilting casting mechanism in existing technologies, reduces the footprint of the solidification furnace, improves space utilization, increases heating speed, and extends the service life of the solidification furnace.

[0004] However, the current directional solidification furnace has the following problems: it is not convenient to sample the molten metal in the crucible, which makes it difficult to sample and analyze the composition of the molten metal before casting. As a result, it is impossible to confirm whether the proportion of each metal meets the design requirements, which will lead to deviations in the chemical composition of the final casting and make it difficult to achieve precise casting. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a vacuum directional solidification molding furnace with a segmented sampling device, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vacuum directional solidification molding furnace with a segmented sampling device, comprising a processing table, a solidification furnace fixed to the top of the processing table, a crucible pouring assembly and a sampling device disposed on the top of the solidification furnace, the sampling device comprising two electric lifting rods fixed to the top of the solidification furnace, a geometric frame fixed between the tops of the two electric lifting rods, an electric push rod fixed to the top of the geometric frame, and a sampling cylinder fixed to the bottom of the geometric frame, wherein the outer wall of the sampling cylinder has several sampling cavities. The sampling chambers are arranged in an alternating vertical configuration. A circular cavity is formed at the top of the sampling tube. A central column is slidably mounted through the top of the sampling tube. A positioning plate is fixed to the outer wall of the central column. Springs are provided between the top and bottom of the positioning plate and the inner wall of the circular cavity of the sampling tube. Several sliding plates are fixed to the outer wall of the central column. The sliding plates are slidably mounted inside the sampling chamber. A push plate is fixed to the outer wall of the telescopic end of the electric push rod. The telescopic end of the electric push rod passes through the top of the central column, and a sliding cavity for the push plate to slide is formed inside the central column.

[0007] According to the above technical solution, a hydraulic cylinder is fixed at the bottom of the processing table, and a placement platform is fixed at the top of the telescopic end of the hydraulic cylinder. The crucible pouring assembly consists of an electric rotating bracket and a crucible.

[0008] According to the above technical solution, the top of the sampling cylinder is provided with several sliding grooves, and several T-shaped rods are slidably installed on the inner wall of each sliding groove of the sampling cylinder. A blocking strip is fixed at the bottom of each T-shaped rod. When the blocking strip is used to block the position of several sampling chambers arranged vertically, two hinge rods are hinged to the upper outer wall of each T-shaped rod. A hinge plate is hinged to the end of each hinge rod away from the T-shaped rod. The hinge plate is sleeved on the outer wall of the telescopic end of the electric push rod, and there is a clearance fit between the hinge plate and the telescopic end of the electric push rod. A spring is provided between each of the two hinge plates and the inner wall of the sliding groove of the sampling cylinder. A fixing plate is fixed to the outer wall of the telescopic end of the electric push rod, and the fixing plate is located between the two hinge plates.

[0009] According to the above technical solution, a number of baffle strips are evenly and equidistantly fixed on the outer wall of the sampling cylinder, and two of the baffle strips form a group, with the two baffle strips located on both sides of the sampling cavity respectively.

[0010] According to the above technical solution, a receiving device is provided at the truncated frame. The receiving device includes two elastic telescopic columns fixed to the top of the solidification furnace. A U-shaped frame is slidably installed between the tops of the two elastic telescopic columns. The top of the U-shaped frame is hinged to the outer wall of the truncated frame through a hinge rod. A bayonet plate is fixed in the middle of the top surface of the U-shaped frame. Several sample dishes are clamped to the outer wall of the bayonet plate.

[0011] According to the above technical solution, the sample dish is positioned directly below the two edge strips.

[0012] According to the above technical solution, a scraping device is provided at the electric lifting rod. The scraping device includes a ring frame fixed between the top of the two fixed ends of the electric lifting rod. A scraping ring is fixed at the bottom of the ring frame. The outer wall of the scraping ring has a notch for the edge strip and T-shaped rod to pass through.

[0013] According to the above technical solution, a protruding rod is fixed to the outer wall of the geometric frame, and a semi-circular protrusion is fixed to the outer wall of the protruding rod. Elastic telescopic rods are fixed to both sides of the ring frame. A crossbar is fixed between the telescopic ends of the two telescopic elastic telescopic rods. Semi-circular blocks are fixed to both sides of the crossbar. The semi-circular blocks of the crossbar are located on the movement trajectory of the semi-circular protrusions of the protruding rod. Two striking posts are fixed to the middle of the crossbar. The striking posts are in contact with the outer wall of the ring frame.

[0014] This invention provides a vacuum directional solidification molding furnace with a segmented sampling device. It has the following beneficial effects:

[0015] (1) By setting up the sampling device and cooperating with the electric lifting rod and the electric push rod, the present invention can accurately control the depth and position of the sampling tube and the sampling chamber entering the crucible, thereby ensuring the accuracy of sampling. This helps to obtain metal liquid samples from different layers in the crucible and improve the representativeness of the test. At the same time, it can ensure that the liquid inlet of the sampling chamber is in a closed state during the process of the sampling tube descending or rising from the metal liquid in the crucible. This avoids the problem that metal liquid with different temperatures and composition differences at different depths in the crucible will be accidentally sucked into the sampling chamber when the sampling tube descends or rises, which would affect the accuracy of the sampling structure. It ensures that the sampling chamber only sucks metal liquid at the target depth, thereby reducing the mixing of different layers of metal liquid and improving the accuracy of the sampling layers.

[0016] (2) By setting up a receiving device, the present invention, with the cooperation of electric lifting rod, geometric frame, hinge rod II, U-shaped frame, elastic telescopic column and bayonet plate, makes the metal liquid in the sampling chamber pushed by the sliding plate fall into the sample dish for collection when it is discharged from the inlet of the sampling chamber. This avoids possible misoperation or delay during manual operation, which provides a convenient operating experience for the staff, especially when frequent operation is required, and improves work efficiency.

[0017] (3) The present invention, through the setting of the scraping device, enables the scraping ring to scrape off the molten metal adhering to the surface of the sampling cylinder and drip it back into the crucible, thereby effectively avoiding the problem of cross-contamination of the sample in the sample dish caused by the molten metal adhering to the surface of the sampling cylinder dripping into the sample dish, thus ensuring the purity of the sample; at the same time, the geometric frame, the protruding rod, the crossbar, and the elastic telescopic rod work together to drive the striking column to strike the ring frame, and the ring frame drives the scraping ring to vibrate, thereby enabling the scraping ring to effectively shake off the scraped molten metal, avoiding the molten metal remaining on the surface of the scraping ring or hanging on the scraping ring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the entire invention;

[0019] Figure 2 This is a schematic diagram of a partial structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the sampling device of the present invention;

[0021] Figure 4 This is a partial structural diagram of the sampling device of the present invention. Figure 1 ;

[0022] Figure 5 This is a partial structural diagram of the sampling device of the present invention. Figure 2 ;

[0023] Figure 6 This is a partial cross-sectional schematic diagram of the sampling device of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A;

[0025] Figure 8 This is a cross-sectional schematic diagram of the central column of the present invention;

[0026] Figure 9 This is a schematic diagram of the scraping device of the present invention;

[0027] Figure 10 This is a schematic diagram of the receiving device of the present invention.

[0028] In the diagram: 1. Processing table; 2. Hydraulic cylinder; 3. Placement table; 4. Solidification furnace; 5. Crucible pouring assembly; 6. Sampling device; 61. Electric lifting rod; 62. Rack; 63. Electric push rod; 64. Sampling cylinder; 65. Side guard strip; 66. Center column; 67. Positioning plate; 68. Push plate; 69. Sampling chamber; 610. Slide plate; 611. Fixing plate; 612. T-shaped rod; 613. Hinge rod one; 614. Blocking strip; 615. Hinge plate; 7. Scraping device; 71. Ring frame; 72. Scraping ring; 73. Striking column; 74. Crossbar; 75. Protrusion rod; 76. Elastic telescopic rod; 8. Receiving device; 81. Elastic telescopic column; 82. U-shaped frame; 83. Hinge rod two; 84. Bayonet plate; 85. Sample dish. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Please see Figures 1-10One embodiment of the present invention is a vacuum directional solidification molding furnace with a segmented sampling device, comprising a processing table 1, a solidification furnace 4 fixed on the top of the processing table 1, the solidification furnace 4 having two layers inside, the upper layer of the solidification furnace 4 being a heating and receiving area, and the lower layer of the solidification furnace 4 being a vacuum solidification area, the solidification furnace 4 being equipped with a vacuum system, which is an existing device for evacuating the interior of the solidification furnace 4, and will not be elaborated on here; the top of the solidification furnace 4 is provided with a crucible pouring assembly 5 and a sampling device. The sampling device 6 includes two electric lifting rods 61 fixed to the top of the solidification furnace 4, a rectangular frame 62 fixed between the tops of the two electric lifting rods 61, an electric push rod 63 fixed to the top of the rectangular frame 62, and a sampling cylinder 64 fixed to the bottom of the rectangular frame 62. The outer wall of the sampling cylinder 64 has several sampling cavities 69 arranged in an alternating vertical arrangement. A circular cavity is formed at the top of the sampling cylinder 64. A central column 66 is slidably mounted through the top of the sampling cylinder 64. A positioning plate 67 is fixed to the outer wall of the column 66. Springs are provided between the top and bottom of the positioning plate 67 and the inner wall of the circular cavity of the sampling cylinder 64. Several sliding plates 610 are fixed to the outer wall of the central column 66. The sliding plates 610 are slidably installed inside the sampling cavity 69. The initial position of the sliding plates 610 is located in the middle of the sampling cavity 69. A push plate 68 is fixed to the outer wall of the telescopic end of the electric push rod 63. The telescopic end of the electric push rod 63 passes through the top of the central column 66. A sliding cavity for the push plate 68 to slide is opened inside the central column 66. A hydraulic cylinder 2 is fixed to the bottom of the processing table 1. A placement table 3 is fixed to the top of the telescopic end of the hydraulic cylinder 2. The crucible pouring assembly 5 consists of an electric rotating bracket and a crucible. With the above structure, the depth and position of the sampling cylinder 64 and the sampling cavity 69 entering the crucible can be accurately controlled with the cooperation of the electric lifting rod 61 and the electric push rod 63, thereby ensuring the accuracy of sampling. This helps to obtain metal liquid samples from different layers in the crucible and improves the representativeness of the test.

[0031] The top of the sampling cylinder 64 has several grooves. Several T-shaped rods 612 are horizontally slidably installed on the inner walls of the grooves of each sampling cylinder 64. A blocking strip 614 is fixed to the bottom of each T-shaped rod 612. When the blocking strip 614 blocks the positions of several staggered sampling chambers 69, two hinge rods 613 are hinged to the upper outer walls of each T-shaped rod 612. A hinge plate 615 is hinged to the end of each hinge rod 613 away from the T-shaped rod 612. The hinge plate 615 is sleeved on the outer wall of the telescopic end of the electric push rod 63, and there is a clearance fit between the hinge plate 615 and the telescopic end of the electric push rod 63. Both hinge plates 615 are connected to the sampling cylinder. A spring is provided between the inner walls of the slide groove of 64, and a fixed plate 611 is fixed to the outer wall of the telescopic end of the electric push rod 63. The fixed plate 611 is located between two hinged plates 615. Through the above structure, it is ensured that the liquid inlet of the sampling chamber 69 is in a closed state during the process of the sampling cylinder 64 descending or rising from the molten metal in the crucible. This avoids the problem that molten metal with different temperatures and compositions at different depths in the crucible will be accidentally sucked into the sampling chamber 69 when the sampling cylinder 64 descends or rises, which would affect the accuracy of the sampling structure. It ensures that the sampling chamber 69 only sucks in molten metal at the target depth, thereby reducing the mixing of different layers of molten metal and improving the accuracy of the sampling layer.

[0032] The outer wall of the sampling cylinder 64 is uniformly and equidistantly fixed with several baffle strips 65, and two of the baffle strips 65 form a group. The two baffle strips 65 are located on both sides of the sampling chamber 69. The baffle strips 65 are used to guide the molten metal discharged from the inlet of the sampling chamber 69.

[0033] A receiving device 8 is provided at the rack 62. The receiving device 8 includes two elastic telescopic columns 81 fixed to the top of the solidification furnace 4. A U-shaped frame 82 is slidably installed between the tops of the two elastic telescopic columns 81. The top of the U-shaped frame 82 is hinged to the outer wall of the rack 62 by a hinge rod 83. A bayonet plate 84 is fixed in the middle of the top surface of the U-shaped frame 82. Several sample dishes 85 are clamped to the outer wall of the bayonet plate 84. The sample dishes 85 are directly below the two baffle strips 65. With the above structure, when the slide plate 610 pushes the molten metal in the sampling chamber 69 to be discharged from the inlet of the sampling chamber 69, the discharged molten metal will fall into the sample dish 85 for collection. This avoids possible misoperation or delay during manual operation, providing a convenient operating experience for the staff, especially when frequent operation is required, thus improving work efficiency.

[0034] In use, the orientation mold is placed on the placement platform 3, and the hydraulic cylinder 2 is activated. The telescopic end of the hydraulic cylinder 2 will move the orientation mold on the placement platform 3 into the solidification furnace 4. The vacuum system will evacuate the solidification furnace 4. The telescopic end of the hydraulic cylinder 2 will continue to push the placement platform 3 into the upper heating receiving area of ​​the solidification furnace 4. The upper heating receiving area of ​​the solidification furnace 4 will heat the orientation mold. Then, the crucible pouring component 5 will be activated, and the crucible pouring component 5 will pour the molten metal into the orientation mold. After that, the telescopic end of the hydraulic cylinder 2 will move the orientation mold on the placement platform 3 into the lower vacuum solidification area of ​​the solidification furnace 4 for cooling and forming.

[0035] When it is necessary to test the molten metal in the crucible of the crucible pouring assembly 5, the electric lifting rod 61 is activated. The telescopic end of the electric lifting rod 61 drives the sampling cylinder 64 downward through the bracket 62, and the sampling cylinder 64 enters the crucible. Then, the electric push rod 63 is activated. The telescopic end of the electric push rod 63 drives the push plate 68 downward along the sliding cavity of the central column 66. When the push plate 68 reaches the bottom position of the sliding cavity of the central column 66, as the telescopic end of the electric push rod 63 continues to drive the push plate 68 downward, the push plate 68 will push the central column 66, causing the sliding plate 610 to move downward as well. The sliding plate 610 slides downward along the inside of the sampling cavity 69. At this time, the sampling cavity 69 will draw the molten metal in the crucible into the sampling cavity 69. After that, the electric lifting rod 61 is activated again. The telescopic end of the electric lifting rod 61 drives the sampling cylinder 64 upward through the bracket 62, and the sampling cylinder 64 enters the crucible. Sample cylinder 64 is removed from the crucible. Then, electric push rod 63 is activated. The telescopic end of electric push rod 63 drives push plate 68 to move upward along the inside of the sliding cavity of central column 66. When push plate 68 reaches the top of the sliding cavity of central column 66, as the telescopic end of electric push rod 63 continues to drive push plate 68 upward, push plate 68 will push central column 66 to drive slide plate 610 upward. Slide plate 610 slides upward along the inside of sampling cavity 69. At this time, slide plate 610 will push the molten metal in sampling cavity 69 to be discharged from the inlet of sampling cavity 69, which is convenient for the staff to sample the molten metal in the crucible. Through the cooperation of electric lifting rod 61 and electric push rod 63, the depth and position of sampling cylinder 64 and sampling cavity 69 entering the crucible can be precisely controlled, thereby ensuring the accuracy of sampling. This helps to obtain molten metal samples from different layers in the crucible and improves the representativeness of the test.

[0036] After the sampling cylinder 64 enters the crucible, each time the extension end of the electric push rod 63 moves downwards, before it reaches the bottom of the sliding cavity of the central column 66, the electric push rod 63 will first push the lower hinge plate 615 downwards. The hinge plate 615 pushes the hinge rod 613, which in turn drives the T-shaped rod 612 to move away from the sampling cylinder 64 along the sliding groove of the sampling cylinder 64. The T-shaped rod 612 no longer drives the baffle strip 65 to block the liquid inlet of the sampling cavity 69. At this time, the sampling cavity 69 can be used for molten metal sampling. During the suction operation, as the sampling cylinder 64 moves upward and out of the crucible, the electric push rod 63 is activated. The telescopic end of the electric push rod 63 no longer abuts against the lower hinge plate 615. Under the corresponding spring force, the hinge plate 615 will drive the T-shaped rod 612 to reset via the hinge rod 613. The T-shaped rod 612 will drive the baffle strip 65 to re-block the liquid inlet of the sampling chamber 69, thereby ensuring that the liquid inlet of the sampling chamber 69 remains closed during the process of the sampling cylinder 64 descending or rising from the molten metal in the crucible. This avoids the problem of molten metal with different temperatures and compositions at different depths in the crucible being accidentally drawn into the sampling chamber 69 when the sampling cylinder 64 descends or rises, affecting the accuracy of the sampling structure. It ensures that the sampling chamber 69 only draws in molten metal at the target depth, thereby reducing the mixing of different layers of molten metal and improving the accuracy of the sampling layers. After the sampling cylinder 64 moves out of the molten metal surface of the crucible, it moves upward at the extension end of the electric push rod 63 each time, before reaching the central column 66. When the slide cavity is at its highest point, the electric push rod 63 will first push the upper hinge plate 615 to move upward. The hinge plate 615 pushes the hinge rod 613 to drive the T-shaped rod 612 to move away from the sampling cylinder 64 along the slide groove of the sampling cylinder 64. The T-shaped rod 612 no longer drives the baffle strip 65 to block the liquid inlet of the sampling cavity 69. At this time, the sampling cavity 69 can carry out the metal liquid discharge operation, thereby avoiding the problem that the presence of the baffle strip 65 will affect the staff to sample the metal liquid in the sampling cavity 69.

[0037] Each time the electric lifting rod 61 moves the U-shaped frame 62 downwards, the U-shaped frame 62, through the hinge rod 83, presses against the telescopic end of the elastic telescopic column 81. The U-shaped frame 62 pushes the hinge rod 83, causing the U-shaped frame 82 to slide to one side along the top of the telescopic end of the elastic telescopic column 81. This allows the U-shaped frame 82 to move the bayonet plate 84 away from below the sampling cylinder 64. As the telescopic end of the electric lifting rod 61 continues to move downwards, the telescopic end of the elastic telescopic column 81 is continuously pressed, thus preventing the bayonet plate 84 from interfering with the downward movement of the sampling cylinder 64. Each time the electric lifting rod 61 moves the U-shaped frame 62... When moving upward, the telescopic end of the elastic telescopic column 81 resets and moves upward under its own elastic force. As the electric lifting rod 61 continues to drive the U-shaped frame 62 upward, the U-shaped frame 62 will pull the hinge rod 83 to reset the U-shaped frame 82. The U-shaped frame 82 will then move the bayonet plate 84 to the position below the sampling cylinder 64. This allows the sliding plate 610 to push the molten metal in the sampling chamber 69 out of the inlet of the sampling chamber 69. The discharged molten metal will fall into the sample dish 85 for collection, thus avoiding possible misoperation or delay during manual operation. This provides a convenient operating experience for the staff, especially when frequent operation is required, improving work efficiency.

[0038] Please see Figures 1-10 Based on the above embodiments, in another embodiment of the present invention, a scraping device 7 is provided at the electric lifting rod 61. The scraping device 7 includes a ring frame 71 fixed between the top of the fixed ends of the two electric lifting rods 61. A scraping ring 72 is fixed at the bottom of the ring frame 71. The outer wall of the scraping ring 72 has a notch for the side strip 65 and the T-shaped rod 612 to pass through. With the above structure, the scraping ring 72 will scrape off the molten metal adhering to the surface of the sampling cylinder 64 and drip it back into the crucible, thereby effectively avoiding the problem of cross-contamination of the sample in the sample dish 85 caused by the molten metal adhering to the surface of the sampling cylinder 64 dripping into the sample dish 85, thus ensuring the purity of the sample.

[0039] A protruding rod 75 is fixed to the outer wall of the bracket 62, and a semi-circular protrusion is fixed to the outer wall of the protruding rod 75. Elastic telescopic rods 76 are fixed to both sides of the ring frame 71. A crossbar 74 is fixed between the telescopic ends of the two telescopic elastic telescopic rods 76. Semi-circular blocks are fixed to both sides of the crossbar 74. The semi-circular blocks of the crossbar 74 are located on the movement trajectory of the semi-circular protrusions of the protruding rod 75. Two striking posts 73 are fixed in the middle of the crossbar 74. The striking posts 73 are in contact with the outer wall of the ring frame 71. Through the above structure, the striking posts 73 strike the ring frame 71, and the ring frame 71 drives the scraper ring 72 to vibrate, so that the scraper ring 72 can effectively shake off the scraped molten metal, avoiding the molten metal remaining on the surface of the scraper ring 72 or hanging on the scraper ring 72.

[0040] In use, each time the sampling cylinder 64 is removed from the surface of the molten metal in the crucible, it passes through the scraper ring 72. The scraper ring 72 scrapes off the molten metal adhering to the surface of the sampling cylinder 64 and drips it back into the crucible, effectively preventing the molten metal adhering to the surface of the sampling cylinder 64 from dripping into the sample dish 85 and causing cross-contamination of the sample in the sample dish 85, thus ensuring the purity of the sample. At the same time, as the bracket 62 moves upward, it will drive the protrusion rod 75 to move as well. The semi-circular protrusion of the protrusion rod 75 will push the semi-circular block of the crossbar 74, causing the crossbar 74 to move away from the ring. The ring frame 71 and the crossbar 74 drive the extension end of the elastic telescopic rod 76 to stretch, and the crossbar 74 drives the striking column 73 to move away from the ring frame 71. When the semi-circular protrusion of the protrusion rod 75 no longer pushes the semi-circular block of the crossbar 74, under the elastic force of the elastic telescopic rod 76, the elastic telescopic rod 76 drives the striking column 73 to reset through the crossbar 74. The striking column 73 strikes the ring frame 71, and the ring frame 71 drives the scraper ring 72 to vibrate, so that the scraper ring 72 can effectively shake off the scraped molten metal, avoiding the molten metal remaining on the surface of the scraper ring 72 or hanging on the scraper ring 72.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vacuum directional solidification molding furnace with a segmented sampling device, comprising a processing table (1), characterized in that: A solidification furnace (4) is fixed on the top of the processing table (1). A crucible pouring assembly (5) and a sampling device (6) are provided on the top of the solidification furnace (4). The sampling device (6) includes two electric lifting rods (61) fixed on the top of the solidification furnace (4), a geometric frame (62) fixed between the tops of the two electric lifting rods (61), an electric push rod (63) fixed on the top of the geometric frame (62), and a sampling cylinder (64) fixed on the bottom of the geometric frame (62). The outer wall of the sampling cylinder (64) is provided with several sampling cavities (69), and the sampling cavities (69) are arranged alternately. A circular cavity is provided in the upper part of the inside of the sampling cylinder (64). A central column (66) is slidably mounted through the top of the sampling cylinder (64). A positioning plate (67) is fixed to the outer wall of the central column (66). Springs are provided between the top and bottom of the positioning plate (67) and the inner wall of the circular cavity of the sampling cylinder (64). Several sliding plates (610) are fixed to the outer wall of the central column (66). The sliding plates (610) are slidably mounted inside the sampling cavity (69). A push plate (68) is fixed to the outer wall of the telescopic end of the electric push rod (63). The telescopic end of the electric push rod (63) passes through the top of the central column (66), and a sliding cavity for the push plate (68) to slide is opened inside the central column (66).

2. The vacuum directional solidification molding furnace with a segmented sampling device according to claim 1, characterized in that: The bottom of the processing table (1) is fixed with a hydraulic cylinder (2), and the top of the telescopic end of the hydraulic cylinder (2) is fixed with a placement platform (3). The crucible pouring assembly (5) consists of an electric rotating bracket and a crucible.

3. A vacuum directional solidification molding furnace with a segmented sampling device according to claim 1, characterized in that: The top of the sampling cylinder (64) is provided with several sliding grooves. Several T-shaped rods (612) are slidably installed on the inner wall of each of the sliding grooves of the sampling cylinder (64). A blocking strip (614) is fixed to the bottom of each of the T-shaped rods (612). When the blocking strip (614) is used to block the position of several sampling cavities (69) arranged vertically, two hinge rods (613) are hinged to the upper outer wall of each of the T-shaped rods (612). The two hinge rods (613) are far from each other. A hinge plate (615) is hinged to one end of the T-shaped rod (612). The hinge plate (615) is sleeved on the outer wall of the telescopic end of the electric push rod (63), and the hinge plate (615) and the telescopic end of the electric push rod (63) are in clearance fit. A spring is provided between the two hinge plates (615) and the inner wall of the slide groove of the sampling cylinder (64). A fixing plate (611) is fixed to the outer wall of the telescopic end of the electric push rod (63), and the fixing plate (611) is located between the two hinge plates (615).

4. A vacuum directional solidification molding furnace with a segmented sampling device according to claim 1, characterized in that: The outer wall of the sampling tube (64) is uniformly and equidistantly fixed with a number of edge strips (65), and two of the edge strips (65) form a group, with the two edge strips (65) located on both sides of the sampling cavity (69).

5. A vacuum directional solidification molding furnace with a segmented sampling device according to claim 4, characterized in that: A receiving device (8) is provided at the truncated bracket (62). The receiving device (8) includes two elastic telescopic columns (81) fixed to the top of the solidification furnace (4). A U-shaped bracket (82) is slidably installed between the tops of the two elastic telescopic columns (81). The top of the U-shaped bracket (82) is hinged to the outer wall of the truncated bracket (62) by a hinge rod (83). A bayonet plate (84) is fixed in the middle of the top surface of the U-shaped bracket (82). Several sample dishes (85) are clamped at the outer wall of the bayonet plate (84).

6. A vacuum directional solidification molding furnace with a segmented sampling device according to claim 5, characterized in that: The sample dish (85) is directly below the two side guards (65).

7. A vacuum directional solidification molding furnace with a segmented sampling device according to claim 4, characterized in that: A scraping device (7) is provided at the electric lifting rod (61). The scraping device (7) includes a ring frame (71) fixed between the top of the fixed ends of the two electric lifting rods (61). A scraping ring (72) is fixed at the bottom of the ring frame (71). The outer wall of the scraping ring (72) is provided with a notch for the side strip (65) and the T-shaped rod (612) to pass through.

8. A vacuum directional solidification molding furnace with a segmented sampling device according to claim 7, characterized in that: A protruding rod (75) is fixed to the outer wall of the geometric frame (62), and a semi-circular protrusion is fixed to the outer wall of the protruding rod (75). Elastic telescopic rods (76) are fixed to both sides of the ring frame (71). A crossbar (74) is fixed between the telescopic ends of the two telescopic elastic telescopic rods (76). A semi-circular block is fixed to both sides of the crossbar (74). The semi-circular block of the crossbar (74) is located on the movement trajectory of the semi-circular protrusion of the protruding rod (75). Two striking posts (73) are fixed in the middle of the crossbar (74). The striking posts (73) are in contact with the outer wall of the ring frame (71).

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