A control device for hot mold centrifugal casting of ductile iron pipes

Abstract

The present invention discloses a control device for a metering ladle for hot-molding centrifugal casting of ductile iron pipes, which relates to the technical field of metering ladle control devices. The device comprises a base plate, four support blocks evenly mounted on the top of the base plate, a connecting rod mounted on the side of each two corresponding support blocks close to each other, a first weighing sensor mounted on the top of each of the two connecting rods, a second weighing sensor mounted on the top of each of the two support blocks, and a clamping block mounted on the top of each of the two second weighing sensors. In the present invention, when in use, a roller is placed on a rail scale, and a servo controller on the servo hydraulic cylinder activates the servo hydraulic cylinder, pulling the connecting plate, causing the clamping plate to pull the driving wheel to move, and the driving wheel moves to pull the chain. Under the cooperation of the first sprocket and the second sprocket, one end of the chain pulls the connecting base, and under the cooperation of the clamping block and the round rod, the molten iron ladle rotates around the round rod to pour out the molten iron.

Description

Technical Field

[0001] The invention relates to the technical field of quantitative package control devices, in particular to a quantitative package control device for hot mold centrifugal casting of ductile iron pipes. Background Art

[0002] In the ductile iron pipe production line, the hot mold centrifugal casting process is suitable for the production of large-size ductile iron pipes. Its production equipment is generally divided into three parts according to its function, namely: pouring system, molding system, and pipe drawing system; the pouring system is responsible for injecting qualified molten iron into the molding system, the molding system uses the centrifugal principle to form, and the pipe drawing system is responsible for pulling the formed cast iron pipe out of the mold and sending it to the subsequent workstation; among them, the ladle control device in the pouring system plays a vital role in controlling the pipe weight and wall thickness of the ductile iron pipe.

[0003] The existing pouring system generally injects molten iron through repeated movements of the machine during pouring. However, during use, the cooled molten iron is easily solidified and attached to the ladle, resulting in inconsistent amounts of molten iron poured out later, which is inconvenient to use. Therefore, we disclose a control device for a metering ladle for hot mold centrifugal casting of ductile iron pipes to meet people's needs. Summary of the Invention

[0004] The purpose of the present application is to provide a control device for a metering ladle for hot mold centrifugal casting of ductile iron pipes, so as to solve the problem raised in the above background technology that during use, cooled molten iron is easily solidified and attached to the ladle, resulting in inconsistent amount of molten iron poured out later and inconvenient use.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a control device for a ductile iron pipe hot mold centrifugal casting metering ladle, comprising a base plate, four support blocks evenly installed on the top of the base plate, a connecting rod installed on the side where each two corresponding support blocks are close to each other, a first weighing sensor installed on the top of each of the two connecting rods, wherein a second weighing sensor is installed on the top of each of the two support blocks, a clamping block is installed on the top of each of the two second weighing sensors, a round rod is rotatably installed on the side where the two clamping blocks are close to each other, an iron ladle is installed on the side where the two round rods are close to each other, blocks are installed on both sides of the two iron ladles, the bottoms of the two blocks respectively abut against the tops of the two first weighing sensors, a pulling component is installed on the base plate, and a moving component is installed on the base plate.

[0006] Preferably, the pulling assembly includes a servo hydraulic cylinder, which is installed on the top of the base plate through a disassembly assembly, and a mounting block is installed on the top of the two connecting rods, and two blocks are symmetrically installed on the top of the mounting block, and a first sprocket is rotatably installed on the side where the two blocks are close to each other, and two square plates are symmetrically installed on the bottom of the mounting block, and a second sprocket is rotatably installed on the side where the two square plates are close to each other, a connecting plate is installed on the output shaft of the servo hydraulic cylinder, and two clamping plates are symmetrically installed on one side of the connecting plate, and a driving wheel is rotatably installed on the side where the two clamping plates are close to each other, a connecting base is installed on the bottom of the ladle, a chain is installed on one side of the connecting base, and a connecting seat is installed on one side of the base, one end of the chain is connected to one side of the connecting seat, and the chain contacts the outer peripheral sides of the first sprocket, the second sprocket and the driving wheel respectively.

[0007] Preferably, the disassembly assembly includes a mounting seat, a hollow seat is installed on the top of the base plate, the mounting seat is slidably installed in the hollow seat, the top of the mounting seat is connected to the outer peripheral side of the servo hydraulic cylinder, and a locking assembly is installed on the hollow seat.

[0008] Preferably, the locking assembly includes a locking rod, a circular through hole is provided on one side of the hollow seat, the locking rod is slidably installed in the circular through hole, a locking hole adapted for the locking rod is provided on one side of the mounting seat, one end of the locking rod passes through the circular through hole and extends into the locking hole, an anti-drop cap is installed on the other end of the locking rod, a pull-back unit is installed on the hollow seat, a pulling unit is installed on the anti-drop cap, and a synchronization assembly is installed on the anti-drop cap.

[0009] Preferably, the pull-back unit includes a tension spring, which is sleeved and mounted on the locking rod, one end of the tension spring is connected to one side of the hollow seat, and the other side of the tension spring is connected to one side of the anti-drop cap.

[0010] Preferably, the pulling unit includes a pull tab, and the pull tab is installed on one side of the anti-drop cap.

[0011] Preferably, the synchronization assembly includes two L-shaped rods, and the two L-shaped rods are respectively installed on the outer peripheral sides of the two anti-drop caps. A gear is rotatably installed on one side of the hollow seat, and a plurality of teeth meshing with the gears are evenly installed on the sides of the two L-shaped rods close to each other, and a limiting unit is installed on the L-shaped rod.

[0012] Preferably, the limiting unit includes two limiting blocks, and the two limiting blocks are respectively installed on the sides of the two L-shaped rods that are close to each other.

[0013] Preferably, the moving assembly includes a roller, two fixed blocks are installed at the bottom of the base plate, the roller is rotatably installed on one side of the two fixed blocks close to each other, and a locking assembly is installed on the fixed blocks.

[0014] Preferably, the locking assembly includes a threaded rod, wherein a threaded hole adapted to the threaded rod is opened on one side of one of the fixing blocks, the threaded rod is threadedly installed in the threaded hole, and one end of the threaded rod passes through the threaded hole and is installed with a rotating piece.

[0015] In summary, the technical effects and advantages of the present invention are as follows:

[0016] 1. In the present invention, when in use, the roller is placed on the track scale, and the servo controller on the servo hydraulic cylinder starts the servo hydraulic cylinder, pulling the connecting plate, so that the clamping plate pulls the driving wheel to move, and the driving wheel moves to pull the chain. With the cooperation of the first sprocket and the second sprocket, one end of the chain pulls the connecting base. With the cooperation of the clamping block and the round rod, the molten iron ladle rotates around the round rod to pour out the molten iron. The traction force read by the track scale and the servo controller and the data between the first weighing sensor and the second weighing sensor are used to control the pouring amount through an algorithm, so that the amount of molten iron poured out is more accurate and convenient to use.

[0017] 2. In the present invention, when the servo hydraulic cylinder needs to be disassembled, the pull tab is pulled to drive the locking rod to move through the anti-drop cap. With the cooperation of the L-shaped rod, teeth and gear, the two locking rods move away from each other, unlocking the mounting seat, and the servo hydraulic cylinder is removed. When a new servo hydraulic cylinder is installed, the mounting seat is inserted into the hollow seat, the pull tab is released, and under the tension of the tension spring, the locking rod is driven to move toward the mounting seat. With the cooperation of the L-shaped rod, teeth and gear, the two locking rods approach each other and are inserted into the lock hole to lock the mounting seat. It is simpler and more convenient to use and has good practicality.

[0018] 3. In the present invention, when the base plate needs to be moved, the rotating piece is rotated to drive the threaded rod to rotate, so that the threaded rod rotates and moves away from the roller, unlocking the roller, and then the base plate is pushed. With the cooperation of the roller, the base plate moves. After moving to the appropriate position, the rotating piece is rotated in the opposite direction to make the threaded rod rotate in the opposite direction and move toward the roller. One end of the threaded rod is pressed against one side of the roller to lock the roller, making it unable to rotate. It is simpler and more convenient to use and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a control device for a hot mold centrifugal casting metering package for a ductile iron pipe according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of a control device for a hot mold centrifugal casting metering package for a ductile iron pipe according to an embodiment of the present application from another perspective;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection portion between the clamping block and the round rod in the embodiment of the present application;

[0023] Figure 4 This is an enlarged three-dimensional structural diagram of the connecting portion of the driving wheel and the splint in the embodiment of the present application;

[0024] Figure 5 For the embodiment of this application Figure 3 Schematic diagram of the enlarged structure of part A;

[0025] Figure 6 This is an enlarged three-dimensional structural diagram of the connection part between the threaded rod and the rotating piece in the embodiment of the present application.

[0026] In the figure: 1. Base plate; 2. Support block; 3. Connecting rod; 4. First weighing sensor; 5. Second weighing sensor; 6. Clamping block; 7. Ladle; 8. Stop block; 9. Mounting block; 10. Block; 11. First sprocket; 12. Chain; 13. Hollow seat; 14. Connecting base; 15. Square plate; 16. Second sprocket; 17. Driving wheel; 18. Connecting seat; 19. Servo hydraulic cylinder; 20. Mounting seat; 21. Round rod; 22. Clamping plate; 23. Connecting plate; 24. Locking rod; 25. Tension spring; 26. Anti-drop cap; 27. Pull tab; 28. L-shaped rod; 29. Teeth; 30. Gear; 31. Limit block; 32. Fixing block; 33. Threaded rod; 34. Rotating piece; 35. Roller. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Reference Figure 1-6 The shown device is a control device for a hot mold centrifugal casting metering ladle of ductile iron pipes, comprising a base plate 1, with four support blocks 2 evenly installed on the top of the base plate 1, a connecting rod 3 installed on the side where each two corresponding support blocks 2 are close to each other, a first weighing sensor 4 installed on the top of the two connecting rods 3, wherein a second weighing sensor 5 is installed on the top of the two support blocks 2, a clamping block 6 is installed on the top of the two second weighing sensors 5, a round rod 21 is rotatably installed on the side where the two clamping blocks 6 are close to each other, a molten iron ladle 7 is installed on the side where the two round rods 21 are close to each other, a stop block 8 is installed on both sides of the two ladles 7, the bottoms of the two stop blocks 8 respectively abut against the tops of the two first weighing sensors 4, a pulling component is installed on the base plate 1, and a moving component is installed on the base plate 1.

[0029] With the above structure, when in use, the ladle 7 is driven to rotate between the two clamping blocks 6 by pulling the assembly to pour out the molten iron. Through the coordination between different devices, the amount of molten iron poured out can be controlled, making it easier to use and more practical.

[0030] refer to Figure 1 、 2 As shown in Figure 3, the pulling assembly includes a servo hydraulic cylinder 19, which is installed on the top of the base plate 1 by disassembling the assembly. A mounting block 9 is installed on the top of the two connecting rods 3. Two blocks 10 are symmetrically installed on the top of the mounting block 9. The first sprocket 11 is rotatably installed on the side where the two blocks 10 are close to each other. Two square plates 15 are symmetrically installed on the bottom of the mounting block 9. The second sprocket 16 is rotatably installed on the side where the two square plates 15 are close to each other. A connecting plate 23 is installed on the output shaft of the servo hydraulic cylinder 19. Two clamping plates 22 are symmetrically installed on one side of the connecting plate 23. A driving wheel 17 is rotatably installed on the side where the two clamping plates 22 are close to each other. A connecting base 14 is installed on the bottom of the ladle 7. One side of the connecting base 14 A chain 12 is installed, and a connecting seat 18 is installed on one side of the base plate 1. One end of the chain 12 is connected to one side of the connecting seat 18. The chain 12 is respectively in contact with the outer peripheral sides of the first sprocket 11, the second sprocket 16 and the driving wheel 17. Through the setting of the servo hydraulic cylinder 19, when in use, the servo controller on the servo hydraulic cylinder 19 starts the servo hydraulic cylinder 19, pulls the connecting plate 23, and causes the clamping plate 22 to pull the driving wheel 17 to move. The driving wheel 17 moves and pulls the chain 12. With the cooperation of the first sprocket 11 and the second sprocket 16, one end of the chain 12 pulls the connecting base 14. With the cooperation of the clamping block 6 and the round rod 21, the molten iron ladle 7 rotates around the round rod 21 to pour out the molten iron, which is more convenient to use and has good practicality.

[0031] refer to Figure 1 、 2As shown in , 3 and 5, the disassembly component includes a mounting seat 20, a hollow seat 13 is installed on the top of the base plate 1, the mounting seat 20 is slidably installed in the hollow seat 13, the top of the mounting seat 20 is connected to the outer peripheral side of the servo hydraulic cylinder 19, and a locking component is installed on the hollow seat 13. Through the setting of the mounting seat 20, with the cooperation of the hollow seat 13, the servo hydraulic cylinder 19 is conveniently disassembled, it is more convenient to use, and the disassembly of the servo hydraulic cylinder 19 is simpler and more practical.

[0032] refer to Figure 1 、 2 As shown in , 3 and 5, the locking assembly includes a locking rod 24, a circular through hole is provided on one side of the hollow seat 13, and the locking rod 24 is slidably installed in the circular through hole. A locking hole adapted to the locking rod 24 is provided on one side of the mounting seat 20, and one end of the locking rod 24 passes through the circular through hole and extends into the locking hole. An anti-drop cap 26 is installed on the other end of the locking rod 24, a pullback unit is installed on the hollow seat 13, a pulling unit is installed on the anti-drop cap 26, and a synchronization assembly is installed on the anti-drop cap 26. Through the setting of the locking rod 24, it is convenient to lock the mounting seat 20, thereby locking the servo hydraulic cylinder 19, and fixing the servo hydraulic cylinder 19 is simpler, more convenient, and more practical.

[0033] refer to Figure 1 、 2 As shown in Figures 3 and 5, the pullback unit includes a tension spring 25, which is mounted on the locking rod 24. One end of the tension spring 25 is connected to one side of the hollow seat 13, and the other side of the tension spring 25 is connected to one side of the anti-drop cap 26. Through the setting of the tension spring 25, after loosening the anti-drop cap 26, under the tension of the tension spring 25, the locking rod 24 moves toward the mounting seat 20 and is inserted into the lock hole, locking the mounting seat 20, which is more convenient to use.

[0034] refer to Figure 1 、 2 As shown in Figures 3 and 5, the pulling unit includes a pull tab 27, which is installed on one side of the anti-drop cap 26. The setting of the pull tab 27 makes it easier to pull the locking rod 24 to move, making it easier and more convenient to use.

[0035] refer to Figure 1 、 2 As shown in , 3 and 5, the synchronization component includes two L-shaped rods 28, and the two L-shaped rods 28 are respectively installed on the outer peripheral sides of the two anti-dropping caps 26. A gear 30 is rotatably installed on one side of the hollow seat 13, and a plurality of teeth 29 meshing with the gear 30 are evenly installed on the side where the two L-shaped rods 28 are close to each other. A limiting unit is installed on the L-shaped rod 28. Through the setting of the L-shaped rod 28, after pulling the pull tab 27, the anti-dropping cap 26 is driven to move, so that the L-shaped rod 28 moves. With the cooperation of the teeth 29 and the gear 30, the two L-shaped rods 28 are close to or away from each other at the same time, which is simpler and more convenient to use and has good practicality.

[0036] refer to Figure 1 、 3 As shown in FIG5 , the limiting unit includes two limiting blocks 31 , which are respectively installed on the sides of the two L-shaped rods 28 close to each other. By setting the limiting blocks 31 , the moving distance of the L-shaped rods 28 can be conveniently limited, making it easy to use.

[0037] refer to Figure 1 、 2 , 3 and 6, the moving component includes a roller 35, two fixed blocks 32 are installed at the bottom of the base plate 1, the roller 35 is rotatably installed on the side of the two fixed blocks 32 close to each other, and a locking component is installed on the fixed block 32. The setting of the roller 35 facilitates the movement of the base plate 1.

[0038] refer to Figure 1 、 2 As shown in , 3 and 6, the locking assembly includes a threaded rod 33, one side of a fixed block 32 is provided with a threaded hole adapted to the threaded rod 33, the threaded rod 33 is threadedly installed in the threaded hole, one end of the threaded rod 33 passes through the threaded hole and is installed with a rotating piece 34, and the setting of the threaded rod 33 facilitates locking of the roller 35.

[0039] This utility works as follows:

[0040] When in use, the roller 35 is placed on the track scale, and the servo controller on the servo hydraulic cylinder 19 starts the servo hydraulic cylinder 19, pulling the connecting plate 23, so that the clamping plate 22 pulls the driving wheel 17 to move, and the driving wheel 17 moves to pull the chain 12. With the cooperation of the first sprocket 11 and the second sprocket 16, one end of the chain 12 pulls the connecting base 14. With the cooperation of the clamping block 6 and the round rod 21, the molten iron ladle 7 rotates around the round rod 21 to pour out the molten iron. The traction force read by the track scale and the servo controller and the data between the first weighing sensor 4 and the second weighing sensor 5 are controlled by an algorithm to control the pouring amount. The amount of molten iron poured out is more accurate and convenient to use.

[0041] When the servo hydraulic cylinder 19 needs to be disassembled, the pull tab 27 is pulled to drive the locking rod 24 to move through the anti-drop cap 16. With the cooperation of the L-shaped rod 28, the teeth 29 and the gear 30, the two locking rods 24 move away from each other, unlocking the mounting seat 20, and the servo hydraulic cylinder 19 is removed. When the new servo hydraulic cylinder 19 is installed, the mounting seat 20 is inserted into the hollow seat 13, and the pull tab 27 is released. Under the tension of the tension spring 25, the locking rod 24 is driven to move toward the mounting seat 20. With the cooperation of the L-shaped rod 28, the teeth 29 and the gear 30, the two locking rods 24 approach each other and are inserted into the lock hole to lock the mounting seat 20. It is simpler and more convenient to use and has good practicality.

[0042] When the base plate 1 needs to be moved, the rotary plate 34 is rotated to drive the threaded rod 33 to rotate, so that the threaded rod 33 rotates and moves away from the roller 35, unlocking the roller 35, and then the base plate 1 is pushed. With the cooperation of the roller 35, the base plate 1 moves. After moving to the appropriate position, the rotary plate 34 is rotated in the opposite direction, so that the threaded rod 33 rotates in the opposite direction and moves towards the roller 35. One end of the threaded rod 33 is pressed against one side of the roller 35, locking the roller 35 so that the roller 35 cannot rotate, which is simpler and more convenient to use and has good practicality.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control device for a hot mold centrifugal casting metering package for ductile iron pipes, comprising a base plate (1), characterized in that: Four support blocks (2) are evenly installed on the top of the base plate (1), and a connecting rod (3) is installed on the side where each two corresponding support blocks (2) are close to each other, and a first weighing sensor (4) is installed on the top of each of the two connecting rods (3), wherein a second weighing sensor (5) is installed on the top of each of the two support blocks (2), and a clamping block (6) is installed on the top of each of the two second weighing sensors (5). A round rod (21) is rotatably installed on the side where the two clamping blocks (6) are close to each other, and a molten iron ladle (7) is installed on the side where the two round rods (21) are close to each other. Stoppers (8) are installed on both sides of the two molten iron ladles (7), and the bottoms of the two stoppers (8) are respectively against the tops of the two first weighing sensors (4). A pulling component is installed on the base plate (1), and a moving component is installed on the base plate (1); The pulling assembly comprises a servo hydraulic cylinder (19), which is mounted on the top of the base plate (1) through a disassembly assembly. A mounting block (9) is mounted on the top of the two connecting rods (3). Two blocks (10) are symmetrically mounted on the top of the mounting block (9). A first sprocket (11) is rotatably mounted on one side of the two blocks (10) close to each other. Two square plates (15) are symmetrically mounted on the bottom of the mounting block (9). A second sprocket (16) is rotatably mounted on one side of the two square plates (15) close to each other. A connecting rod (16) is mounted on the output shaft of the servo hydraulic cylinder (19). A plate (23), two clamping plates (22) are symmetrically installed on one side of the connecting plate (23), a driving wheel (17) is rotatably installed on the side where the two clamping plates (22) are close to each other, a connecting base (14) is installed at the bottom of the ladle (7), a chain (12) is installed on one side of the connecting base (14), a connecting seat (18) is installed on one side of the bottom plate (1), one end of the chain (12) is connected to one side of the connecting seat (18), and the chain (12) is in contact with the outer peripheral sides of the first sprocket (11), the second sprocket (16) and the driving wheel (17) respectively; When in use, the roller (35) is placed on the track scale, and the servo controller on the servo hydraulic cylinder (19) starts the servo hydraulic cylinder (19), pulls the connecting plate (23), and causes the clamping plate (22) to pull the driving wheel (17) to move, and the driving wheel (17) moves to pull the chain (12). Under the cooperation of the first sprocket (11) and the second sprocket (16), one end of the chain (12) pulls the connecting base (14), and under the cooperation of the clamping block (6) and the round rod (21), the molten iron ladle (7) rotates around the round rod (21) to pour out the molten iron. The traction force read by the track scale and the servo controller and the data between the first weighing sensor (4) and the second weighing sensor (5) are used to control the pouring amount through an algorithm.

2. The control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 1, characterized in that: The disassembly assembly includes a mounting seat (20), a hollow seat (13) is installed on the top of the base plate (1), the mounting seat (20) is slidably installed in the hollow seat (13), the top of the mounting seat (20) is connected to the outer peripheral side of the servo hydraulic cylinder (19), and a locking assembly is installed on the hollow seat (13).

3. The control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 2, characterized in that: The locking assembly includes a locking rod (24), a circular through hole is provided on one side of the hollow seat (13), and the locking rod (24) is slidably installed in the circular through hole. A locking hole adapted to the locking rod (24) is provided on one side of the mounting seat (20), one end of the locking rod (24) passes through the circular through hole and extends into the locking hole, and an anti-drop cap (26) is installed on the other end of the locking rod (24), a pull-back unit is installed on the hollow seat (13), a pulling unit is installed on the anti-drop cap (26), and a synchronization assembly is installed on the anti-drop cap (26).

4. A control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 3, characterized in that: The pull-back unit includes a tension spring (25), which is sleeved and mounted on the locking rod (24), one end of the tension spring (25) is connected to one side of the hollow seat (13), and the other side of the tension spring (25) is connected to one side of the anti-drop cap (26).

5. The control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 3, characterized in that: The pulling unit comprises a pull tab (27), and the pull tab (27) is installed on one side of the anti-drop cap (26).

6. The control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 3, characterized in that: The synchronization component includes two L-shaped rods (28), the two L-shaped rods (28) are respectively installed on the outer peripheral sides of the two anti-dropping caps (26), a gear (30) is rotatably installed on one side of the hollow seat (13), and a plurality of teeth (29) meshing with the gear (30) are evenly installed on the sides of the two L-shaped rods (28) close to each other, and a limiting unit is installed on the L-shaped rod (28).

7. A control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 6, characterized in that: The limiting unit comprises two limiting blocks (31), and the two limiting blocks (31) are respectively installed on the sides of the two L-shaped rods (28) that are close to each other.

8. The control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 1, characterized in that: The moving assembly includes a roller (35), two fixed blocks (32) are installed at the bottom of the base plate (1), the roller (35) is rotatably installed on the side of the two fixed blocks (32) close to each other, and a locking assembly is installed on the fixed blocks (32).

9. A control device for a hot mold centrifugal casting metering package for ductile iron pipes according to claim 8, characterized in that: The locking assembly includes a threaded rod (33), one side of one of the fixing blocks (32) is provided with a threaded hole adapted to the threaded rod (33), the threaded rod (33) is threadedly installed in the threaded hole, and one end of the threaded rod (33) passes through the threaded hole and is installed with a rotating piece (34).

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