A casting device for alloy wear-resistant steel pipes and its application method

Abstract

This invention discloses a casting device for alloy wear-resistant steel pipes and its usage method, belonging to the field of steel pipe casting technology. The casting device for alloy wear-resistant steel pipes includes an L-shaped base, and further includes: a movable seat, which is mounted on the L-shaped base, and a rotating rod and a drive rod are rotatably mounted on the movable seat, with a first transmission assembly between the rotating rod and the drive rod; a connecting frame, which is rotatably mounted on the rotating rod, and a swing assembly is mounted on the drive rod; and a mold section, which is mounted on the connecting frame. The L-shaped base is equipped with a drive assembly for driving the rotation of the drive rod. This invention, through the integration of four composite movements—centrifugal rotation of the mold, axial reciprocating vibration, circumferential fan-shaped swing, and local periodic tapping—can powerfully refine grains, eliminate bubbles and shrinkage porosity, and effectively suppress the centrifugal segregation of high-density wear-resistant particles, significantly improving the density, compositional uniformity, and overall performance of the cast pipe.

Description

Technical Field

[0001] This invention relates to the field of steel pipe casting technology, and in particular to a casting device for alloy wear-resistant steel pipes and its usage method. Background Technology

[0002] Alloy wear-resistant steel pipes are widely used in material conveying processes in industries such as mining, power, and metallurgy due to their excellent wear resistance and mechanical strength. Currently, these steel pipes are mainly produced through centrifugal casting, which utilizes the centrifugal force generated by the high-speed rotation of the mold to shape the molten metal.

[0003] However, existing casting equipment and methods still have the following technical shortcomings: First, during the pouring and solidification process, gas is easily entrained in the molten metal, and high-density wear-resistant particles (such as tungsten carbide) are prone to radial segregation under centrifugal force, leading to the formation of bubbles and shrinkage porosity inside the cast pipe, as well as uneven composition distribution, which seriously affects its overall wear resistance and service life. Conventional vibration methods mostly use unidirectional excitation, which makes it difficult to achieve three-dimensional homogenization of the molten metal in a centrifugal force field, and has limited effect on eliminating segregation and bubbles. Second, existing equipment is mostly single-function, with vibration, rotation, and demolding actions mostly controlled by independent drive units. The mechanism is complex and the coordination between actions is poor, making it difficult to achieve multi-mode composite mechanical action within the critical solidification time window, resulting in weak process controllability. In addition, the demolding process often requires complex ejection mechanisms or relies on manual operation, which is inefficient and poses safety hazards. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing an alloy wear-resistant steel pipe casting device and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A casting device for alloy wear-resistant steel pipes includes an L-shaped base and further includes: A movable seat is mounted on an L-shaped base. A rotating rod and a driving rod are rotatably mounted on the movable seat, and a first transmission assembly is provided between the rotating rod and the driving rod. A connecting frame is rotatably connected to a rotating rod, and the driving rod is provided with a swinging component for driving the connecting frame to swing about the rotating rod as an axis; A mold section, which is mounted on a connecting frame, is used to pour molten liquid to form a tubular casting; The L-shaped base is provided with a drive assembly for driving the active rod to rotate, and the drive assembly can drive the movable seat to slide on the L-shaped base.

[0006] Preferably, the connecting frame includes two collars rotatably mounted on a rotating rod, a connecting rod fixedly connected to each collar, and a mounting ring mounted on the top of the connecting rod, with a connecting plate disposed between the two connecting rods.

[0007] Preferably, the first transmission assembly includes a first synchronous pulley disposed on the rotating rod and the driving rod, and a first synchronous belt disposed between the two first synchronous pulleys; The swing assembly includes an eccentric shaft mounted on the drive rod, a rotating ring sleeved on the eccentric shaft, and a push-pull rod fixedly connected to the rotating ring. The end of the push-pull rod away from the rotating ring is rotatably connected to the connecting plate via a pin.

[0008] Preferably, the mold part includes a mold housing rotatably disposed within an mounting ring, a push plate and a stopper slidably connected to both ends of the inner wall of the mold housing, a side plate fixedly disposed on a connecting rod, a hydraulic cylinder mounted on the side plate, an end plate disposed at the telescopic end of the hydraulic cylinder, and a movable rod fixedly connected to the end plate. One end of the movable rod is fixedly connected to the stopper, and the end of the movable rod away from the stopper is provided with a connecting member connected to the push plate. A pouring port is provided on the stopper.

[0009] Preferably, a first ball tube is movably connected inside the plug seat, and a second ball tube is slidably connected to the outside of the first ball tube. The plug seat is provided with a ball groove that matches the ball structure of the first ball tube. The ball groove is connected to the pouring port, and the plug seat is provided with a high-temperature resistant gate plate driven by an electric telescopic rod at the pouring port.

[0010] Preferably, the connecting member includes a movable plate fixedly connected to one end of the movable rod, an annular groove formed on the movable plate, a slider slidably connected in the annular groove, and a push rod connected between the slider and the push plate.

[0011] Preferably, a second transmission assembly is provided between the rotating rod and the mold housing. The second transmission assembly includes a second synchronous pulley disposed on the rotating rod and the mold housing, and a second synchronous belt disposed between the two second synchronous pulleys.

[0012] Preferably, the mounting ring is provided with a vibration assembly for striking the mold housing. The vibration assembly includes an upper reciprocating screw rotatably mounted on the mounting ring, an upper sleeve threadedly connected to the upper reciprocating screw, a movable ring rotatably connected to the upper sleeve and slidably connected to the upper reciprocating screw through a keyway structure, and a striking hammer mounted on the movable ring and moving against the mold housing. The upper reciprocating lead screw is provided with a driven gear, and the mold housing is provided with a fixed gear that meshes with the driven gear.

[0013] Preferably, the drive assembly includes a drive motor fixed on an L-shaped base, a lower reciprocating screw connected to the output shaft of the drive motor and rotatably mounted on the L-shaped base, a lower sleeve threadedly connected to the lower reciprocating screw, and a drive rod disposed between the lower sleeve and the movable seat. The lower reciprocating lead screw is fixedly provided with a slide rod that is slidably connected to the driving rod through a keyway structure.

[0014] This invention also discloses a method for using an alloy wear-resistant steel pipe casting device, comprising the following steps: S1: Pour the molten metal into the mold shell through the pouring gate, and close the pouring gate after pouring is completed; S2: Start the drive motor, and the output shaft of the drive motor drives the lower reciprocating screw to rotate; S3: The lower reciprocating screw rotates to drive the lower sleeve to move axially, which in turn drives the moving seat and the entire mold part to slide axially back and forth along the L-shaped base through the drive rod, applying axial vibration to the molten liquid in the mold shell; While the reciprocating screw rotates, it drives the slide bar and the driving rod to rotate. The driving rod drives the rotating rod to rotate through the first transmission component, and the rotating rod drives the mold shell to rotate through the second transmission component, thereby generating centrifugal force in the molten metal. On the other hand, the driving rod drives the connecting frame to swing in a fan shape around the rotating rod as the axis through the swing component, causing the mold shell to swing in a head-shaking circumferential manner. The circumferential swing superimposes an inertial force with a periodically changing direction on the centrifugal force field. This dynamic force field can counteract the particle sedimentation caused by density difference and shear the molten metal, destroying the bubble adhesion. When the mold shell rotates, the fixed gear on the outside meshes with the driven gear, causing the upper reciprocating screw to rotate. The upper reciprocating screw drives the upper sleeve, the moving ring, and the hammer to move axially. At the same time, the moving ring rotates with the upper reciprocating screw, causing the hammer to periodically strike the mold shell. Combined with the rotation of the mold shell itself, the hammer can perform a comprehensive striking action on the outer surface of the mold shell, generating high-frequency shock waves that penetrate into the molten metal inside the mold shell, which can break up the formed bubbles and dendrite networks. S4: After the molten metal has completely solidified under the combined motion, stop the drive motor and control the hydraulic cylinder to retract. The extension and retraction end of the hydraulic cylinder drives the moving rod to move through the end plate. One end of the moving rod pulls the block seat away from the mold shell opening, while the other end pushes the push plate through the connecting piece, thereby pushing the formed steel pipe casting out of the mold shell.

[0015] Compared with the prior art, the present invention provides an alloy wear-resistant steel pipe casting device and its usage method, which has the following beneficial effects: 1. In this invention, four motion modes—axial vibration, centrifugal rotation, circumferential oscillation, and localized impact—are mechanically integrated and linked, driven by a single power source. Axial vibration promotes grain refinement and directional migration of bubbles; high-speed centrifugal rotation ensures the forming and compactness of the pipe fittings; circumferential oscillation generates shear forces with changing directions in the molten metal, forcibly dispersing wear-resistant particles and solving centrifugal segregation; localized impact further breaks up crystal nuclei and large bubbles. These four mechanical fields work synergistically in time and space on the molten metal, forming a three-dimensional, full-process treatment of internal defects (such as porosity, shrinkage, and segregation). This significantly improves the uniformity of the microstructure, mechanical properties, and overall wear resistance of the cast pipe, ensuring high product quality and high reliability.

[0016] 2. In this invention, a single rotary input is decomposed and synchronously converted into four output motions by driving a reciprocating lead screw, eccentric shaft, synchronous belt, gears and other transmission pairs through a drive motor. The timing, phase and speed relationship between each action is inherently determined by the mechanical structure (such as lead screw lead, eccentricity, number of gear teeth), without relying on complex electrical control systems such as sensors, PLC or servo motors for synchronization and coordination. This not only greatly reduces the equipment manufacturing cost and the difficulty of later maintenance, but also ensures the high stability and consistency of the production process due to the inherent reliability and repeatability of mechanical transmission, ensuring the long-term stable operation of the device in the foundry environment.

[0017] 3. In this invention, by driving the demolding process with an independent hydraulic cylinder, the opening of the mold end cover (block) and the ejection of the casting are completed simultaneously under the single action of the hydraulic cylinder. Moreover, when the mold rotates, the push rod and the slider of the mechanical ejection mechanism can slide adaptively in the annular groove without interfering with each other. After solidification, the molded casting can be automatically and smoothly ejected by operating the hydraulic system. No manual intervention or additional hoisting equipment is required throughout the process. This not only improves demolding efficiency and shortens the production cycle, but also eliminates the safety risks of manual close-range operation of high-temperature molds, achieving inherent safety in the production process.

[0018] 4. In this invention, the frequency and amplitude of axial reciprocating vibration can be easily adjusted by replacing the lower reciprocating screw with different leads; the fan-shaped amplitude of circumferential oscillation can be adjusted by changing the eccentricity of the eccentric shaft; and the striking frequency can be changed by selecting gear pairs with different numbers of teeth. These mechanical parameter adjustments are all modular and low-cost operations, enabling the same device to adapt to the casting process requirements of alloy wear-resistant steel pipes of different materials and specifications by quickly replacing standard mechanical parts. This allows for finding the optimal balance between grain refinement, segregation elimination, and gas exhaust, achieving broad coverage and optimization of multiple product processes with a single set of equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 for Figure 2 The left view; Figure 5 This is a schematic diagram of the separation structure of the slide bar and the driving rod of the present invention; Figure 6 This is a schematic diagram of the connecting frame and mold part of the present invention; Figure 7 for Figure 6 Enlarged structural diagram of section B; Figure 8 This is a schematic diagram of the connecting frame of the present invention; Figure 9 This is a schematic diagram of the mold part of the present invention; Figure 10 for Figure 9 Enlarged structural diagram of section C; Figure 11 This is a cross-sectional structural diagram of the mold housing of the present invention.

[0020] In the diagram: 1. L-shaped base; 2. Movable seat; 3. Rotating rod; 4. Driving rod; 5. Connecting frame; 501. Collar; 502. Connecting rod; 503. Mounting ring; 504. Connecting plate; 6. First synchronous pulley; 7. Eccentric shaft; 701. Rotating ring; 702. Push-pull rod; 8. Mold housing; 801. Push plate; 802. Plug; 8021. Sprue; 803. Side plate; 804. Hydraulic cylinder; 805. End plate; 806. Movable rod ; 807, Fixed gear; 9, Connector; 901, Moving plate; 9011, Annular groove; 902, Slider; 903, Push rod; 10, Second synchronous pulley; 11, Upper reciprocating screw; 111, Upper sleeve; 112, Moving ring; 113, Striking hammer; 114, Driven gear; 12, Drive motor; 121, Lower reciprocating screw; 122, Lower sleeve; 123, Drive rod; 124, Slide rod; 13, First ball tube; 14, Second ball tube. Detailed Implementation

[0021] 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.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] like Figure 1 , Figure 2 and Figure 4 As shown, this embodiment proposes an alloy wear-resistant steel pipe casting device, including an L-shaped base 1, and further including: a movable seat 2, a connecting frame 5, and a mold part; the movable seat 2 is disposed on the L-shaped base 1, and a rotating rod 3 and a driving rod 4 are rotatably disposed on the movable seat 2, and a first transmission assembly is disposed between the rotating rod 3 and the driving rod 4; the connecting frame 5 is rotatably disposed with the rotating rod 3, and a swing assembly for driving the connecting frame 5 to swing about the rotating rod 3 as the axis is disposed on the driving rod 4; the mold part is disposed on the connecting frame 5 and is used to pour molten liquid to form a tubular casting; wherein, a driving assembly for driving the driving rod 4 to rotate is disposed on the L-shaped base 1; Specifically, molten alloy is poured into the mold section mounted on the connecting frame 5. Then, the drive assembly is activated to drive the active rod 4 to rotate synchronously. As the active rod 4 rotates, its oscillating component converts the rotational motion into planar reciprocating motion, driving the connecting frame 5 and the entire mold section fixed to it to oscillate reciprocally around the rotating rod 3. Since the connecting frame 5, the mold section, and related components such as the rotating rod 3 and the active rod 4 are all integrated onto the movable base 2, the movable base 2 can slide along the L-shaped base 1. When the drive assembly is working, an additional transmission design can convert the rotational power of the active rod 4 into the axial motion of the movable base 2 along the rotating rod 3. The process involves a complex linear motion. During the solidification of the molten metal, the mold section simultaneously oscillates and moves axially. The oscillation generates a shear force with periodically changing direction on the molten metal, which helps to uniformly disperse the alloy composition, suppress segregation, and promote the rise of bubbles. The axial movement further agitates the molten metal, breaks up grains, refines the microstructure, and assists in the discharge of gases and inclusions. Once the casting has solidified, the drive assembly is stopped, and the mold section stops moving. Through this combined action, the solidification process of the molten metal is optimized in a coordinated manner, significantly reducing defects such as porosity, shrinkage, and uneven composition inside the casting. This greatly improves the density, mechanical properties, and wear resistance uniformity of the alloy wear-resistant steel pipe.

[0024] like Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8As shown, in a preferred embodiment, based on the above method, the connecting frame 5 further includes two collars 501 rotatably mounted on the rotating rod 3, a connecting rod 502 fixedly connected to each collar 501, and a mounting ring 503 disposed on the top of the connecting rod 502. A connecting plate 504 is disposed between the two connecting rods 502. Specifically, the double collars 501 are spaced apart on the rotating rod 3, forming a stable two-point support, effectively limiting the degree of freedom of the connecting frame 5 in the non-swinging direction, and preventing it from tilting or twisting under force. The mounting ring 503 provides a precise mounting positioning surface for the mold. The connecting plate 504 enhances the deformation resistance of the connecting frame 5 when subjected to swing driving force and mold inertial force, i.e., structural rigidity.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment, based on the above method, the first transmission assembly further includes a first synchronous pulley 6 disposed on the rotating rod 3 and the driving rod 4, and a first synchronous belt disposed between the two first synchronous pulleys 6; The swing assembly includes an eccentric shaft 7 mounted on the active rod 4, a rotating ring 701 sleeved on the eccentric shaft 7, and a push-pull rod 702 fixedly connected to the rotating ring 701. The end of the push-pull rod 702 away from the rotating ring 701 is rotatably connected to the connecting plate 504 via a pin. Specifically, when the drive assembly drives the active rod 4 to start rotating, the first synchronous wheel 6 on the active rod 4 rotates accordingly. Through the transmission of the first synchronous belt, the rotational power is transmitted to the first synchronous wheel 6 on the rotating rod 3, thereby driving the rotating rod 3 and the active rod 4 to achieve synchronous and unidirectional rotational motion. When the active rod 4 rotates, the eccentric shaft 7 fixed on it moves in a circular motion around the axis of the active rod 4. The eccentric shaft 7 drives the rotating ring 701 on it to also move in a circular motion around the axis of the active rod 4. Since the connecting frame 5 is hinged to the rotating rod 3 through the collar 501, its swing freedom is constrained on the arc around the axis of the rotating rod 3. Therefore, the motion at the end of the push-pull rod 702 is forced into driving the connecting plate 504 and the entire connecting frame 5 to reciprocate around the axis of the rotating rod 3. The swing amplitude of the swing assembly is mainly determined by the eccentricity of the eccentric shaft 7. By replacing the eccentric shaft 7 with one of different eccentricities, the swing amplitude can be easily and quickly changed, thereby adjusting the intensity of the shear force applied to the molten metal. The swing frequency is directly controlled by the rotation speed of the drive rod 4, enabling the device to flexibly adapt to the different kinetic requirements of the solidification process for wear-resistant steel pipes with different alloy compositions and pipe diameters. By optimizing the swing amplitude and frequency, the best grain refinement, composition homogenization and degassing effects are obtained, enhancing the process adaptability and production flexibility of the equipment.

[0026] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, the mold part further includes a mold housing 8 rotatably disposed within the mounting ring 503, a push plate 801 and a blocking seat 802 slidably connected to both ends of the inner wall of the mold housing 8, a side plate 803 fixedly disposed on the connecting rod 502, a hydraulic cylinder 804 mounted on the side plate 803, an end plate 805 disposed at the telescopic end of the hydraulic cylinder 804, and a moving rod 806 fixedly connected to the end plate 805. One end of the moving rod 806 is fixedly connected to the blocking seat 802, and the end of the moving rod 806 away from the blocking seat 802 is provided with a connecting member 9 connected to the push plate 801. A pouring port 8021 is provided on the blocking seat 802. Specifically, at the forming position, the hydraulic cylinder 804 is in the extended and locked state, so that the push plate 801 and the plug seat 802 respectively abut against the two ends of the mold shell 8, forming a closed cylindrical cavity. The alloy melt is poured into the cavity through the pouring port 8021 on the plug seat 802. Subsequently, the mold shell 8 can be rotated and oscillated under external drive until the casting solidifies and forms in the cavity. After the casting solidifies, the hydraulic cylinder 804 is controlled to retract, and the extension end of the hydraulic cylinder 804 pulls the moving rod 806 to move axially through the end plate 805. When the moving rod 806 is pulled directly, the stop 802 fixedly connected to it disengages from one end of the mold housing 8, opening an outlet. At the same time, the axial movement of the moving rod 806 is transmitted to the push plate 801 through the connector 9 at its other end, applying a pushing force to the push plate 801. Under the action of the pushing force, the push plate 801 slides inward from the other end of the mold housing 8, thereby smoothly pushing out the solidified steel pipe casting from the open port, completing the demolding. The demolded steel pipe casting is then picked up by a forklift or other equipment.

[0027] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 9 , Figure 10 and Figure 11As shown, in a preferred embodiment, based on the above method, a first ball tube 13 is movably connected inside the plug seat 802, and a second ball tube 14 is slidably connected to the outside of the first ball tube 13. A ball groove is provided on the plug seat 802 to cooperate with the ball structure of the first ball tube 13. The ball structure of the second ball tube 14 is connected to the discharge end of the casting equipment. The ball groove is connected to the casting port 8021. The plug seat 802 is provided with a high-temperature resistant gate plate driven by an electric telescopic rod at the casting port 8021. The electric telescopic rod drives the gate plate to open or close the casting port 8021. Specifically, before the casting operation, the inlet end of the second ball tube 14 is connected to the casting equipment, and the outlet end of the first ball tube 13 is connected to the plug seat 802, forming a sealed flow channel to prevent molten steel from splashing, oxidizing, and leaking. By controlling the electric telescopic rod, the high-temperature resistant gate is driven to open the pouring port 8021, and the alloy molten metal can flow into the mold cavity sequentially through the pouring channel, the second ball tube 14, the first ball tube 13, and the pouring port 8021. After the required pouring volume is reached, the electric telescopic rod is first controlled to drive the high-temperature resistant gate to close quickly, cutting off the flow of molten metal from the inside at the pouring port 8021. During the demolding process... Since the pouring port 8021 has been cut off from the inside by the gate, there is no physical connection between the plug seat 802 and the external pouring system for solidified molten metal, thus achieving a clean and unobstructed separation. Through the swing connection of the first ball tube 13 and the telescopic sliding with the second ball tube 14, a flexible pouring pipe with multiple degrees of freedom is formed, which makes it easy to align and seal the fixed external pouring channel with the moving mold plug seat 802, compensating for installation and movement errors between equipment, and eliminating the need to separate the pouring channel from the pouring port 8021 after each pouring of the solution.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 9 and Figure 10 As shown, in a preferred embodiment, based on the above method, the connecting member 9 further includes a movable plate 901 fixedly connected to one end of the movable rod 806, an annular groove 9011 formed on the movable plate 901, a slider 902 slidably connected in the annular groove 9011, and a push rod 903 connected between the slider 902 and the push plate 801. Furthermore, a second transmission assembly is provided between the rotating rod 3 and the mold housing 8. The second transmission assembly includes a second synchronous pulley 10 disposed on the rotating rod 3 and the mold housing 8, and a second synchronous belt disposed between the two second synchronous pulleys 10. Specifically, when the rotating rod 3 rotates under the drive of an external force, the second synchronous wheel 10 on it rotates accordingly. Through the transmission of the second synchronous belt, the rotational power is transmitted to the second synchronous wheel 10 on the mold housing 8, thereby driving the mold housing 8 to rotate around its own axis. When the mold housing 8 rotates, the push rod 903 and the push plate 801 will rotate together with the mold housing 8. At this time, the slider 902 will slide relative to the annular groove 9011 of the moving plate 901, so that the moving plate 901 and its connected moving rod 806, hydraulic cylinder 804 and other demolding drive components can remain stationary, while the rotational motion of the push plate 801 is not affected, thereby realizing the decoupling of motion between the stationary drive component and the rotational motion of the execution component.

[0029] like Figure 6 , Figure 7 and Figure 8 As shown, in a preferred embodiment, based on the above method, the mounting ring 503 is further provided with a vibration assembly for striking the mold housing 8. The vibration assembly includes an upper reciprocating screw 11 rotatably mounted on the mounting ring 503, an upper sleeve 111 threadedly connected to the upper reciprocating screw 11, a moving ring 112 rotatably connected to the upper sleeve 111 and slidably connected to the upper reciprocating screw 11 through a keyway structure, and a striking hammer 113 mounted on the moving ring 112 and movingly abutting against the mold housing 8. The striking hammer 113 includes a high-temperature resistant rubber hammer handle and a hammer head. A driven gear 114 is provided on the upper reciprocating lead screw 11, and a fixed gear 807 that meshes with the driven gear 114 is provided on the mold housing 8; Specifically, when the mold housing 8 rotates under external drive, the fixed gear 807 on its outer wall rotates synchronously. The rotating fixed gear 807 meshes with the driven gear 114, thereby driving the driven gear 114 and its connected upper reciprocating screw 11 to start rotating. When the upper reciprocating screw 11 rotates, it drives the upper sleeve 111, which meshes with it, to move axially through the threaded pair. The moving ring 112 and the hammer 113 move with the upper sleeve 111, but the upper sleeve 111 does not restrict its rotation. Since the moving ring 112 is connected to the upper reciprocating screw 11 through a keyway structure, the moving ring 112 rotates with the upper reciprocating screw 11, and the hammer head is displaced axially along the reciprocating screw. The hammer strikes the mold shell 8, and because the mold shell 8 rotates, the hammer head can make full and continuous contact with the outer surface of the high-speed rotating mold shell 8, forming a periodic and moving strike on the mold shell 8. This avoids the problem of excessive local energy input or local overheating of the mold that may be caused by striking at a fixed point. The vibration is transmitted into the molten metal in the form of stress waves, which can effectively break up the primary dendrite network, refine the solidification structure, and promote the aggregation, floating and discharge of micro bubbles in the molten metal. When superimposed with the single centrifugal force field, a composite physical field is formed, which further enhances the ability to eliminate defects such as porosity and shrinkage in the casting, thereby improving the density and mechanical properties of the casting.

[0030] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in a preferred embodiment, based on the above method, the drive assembly further includes a drive motor 12 fixed on the L-shaped base 1, a lower reciprocating screw 121 connected to the output shaft of the drive motor 12 and rotatably disposed on the L-shaped base 1, a lower sleeve 122 threadedly connected to the lower reciprocating screw 121, and a drive rod 123 disposed between the lower sleeve 122 and the movable seat 2. A slide rod 124 is fixedly mounted on the lower reciprocating lead screw 121 and is slidably connected to the driving rod 4 through a keyway structure; Specifically, the drive motor 12 is started, and its output shaft drives the lower reciprocating screw 121 to rotate continuously. When the lower reciprocating screw 121 rotates, it drives the lower sleeve 122, which meshes with it, to move axially through the threaded pair. The axial movement of the lower sleeve 122 is transmitted to the moving seat 2 through the drive rod 123. The reciprocating screw is a prior art technology, and the sleeve can reciprocate along its axial direction. The drive rod 123 converts the linear motion of the lower sleeve 122 into a pushing and pulling force on the moving seat 2, so that the entire moving seat 2 and all the components it carries can make axial reciprocating linear motion along the L-shaped base 1. Rollers or guide rails can be set at the bottom of the moving seat 2 to improve its movement stability. The reciprocating screw 121 rotates simultaneously with the slide bar 124, and the rotational motion of the slide bar 124 is directly transmitted to the drive rod 4, driving the drive rod 4 to rotate synchronously. The rotation of the drive rod 4 is used to drive the subsequent swing assembly and the first transmission assembly. This eliminates the complex structure of traditional solutions that require separate motors, reducers and transmission systems for rotation and vibration. It not only reduces the manufacturing cost and space occupied by the equipment, but also significantly reduces potential failure points, improves the reliability of the system, and makes the installation, commissioning and maintenance of the equipment simpler.

[0031] This invention also discloses a method for using an alloy wear-resistant steel pipe casting device, comprising the following steps: S1: Pour the molten metal into the mold shell 8 through the pouring gate 8021, and close the pouring gate 8021 after pouring is completed; S2: Start the drive motor 12, and the output shaft of the drive motor 12 drives the lower reciprocating screw 121 to rotate; S3: The lower reciprocating screw 121 rotates to drive the lower sleeve 122 to move axially, and then drives the moving seat 2 and the entire mold part to slide axially back and forth along the L-shaped base 1 through the drive rod 123, so as to apply axial vibration to the molten liquid in the mold shell 8. While the reciprocating screw 121 rotates, it drives the slide bar 124 and the driving rod 4 to rotate. The driving rod 4 drives the rotating rod 3 to rotate through the first transmission component. The rotating rod 3 drives the mold housing 8 to rotate through the second transmission component, thereby generating centrifugal force in the molten metal. On the other hand, the driving rod 4 drives the connecting frame 5 to swing in a fan shape around the rotating rod 3 as the axis through the swing component, causing the mold housing 8 to swing in a head-shaking circumferential manner. The circumferential swing superimposes an inertial force with a periodically changing direction on the centrifugal force field. This dynamic force field can counteract the particle sedimentation caused by density difference and shear the molten metal, destroying the bubble adhesion. When the mold housing 8 rotates, the fixed gear 807 on the outside meshes with the driven gear 114, causing the upper reciprocating screw 11 to rotate. The upper reciprocating screw 11 drives the upper sleeve 111, the moving ring 112, and the striking hammer 113 to move axially. At the same time, the moving ring 112 rotates with the upper reciprocating screw 11, causing the striking hammer 113 to periodically strike the mold housing 8. In conjunction with the rotation of the mold housing 8 itself, the striking hammer 113 can perform a comprehensive striking action on the outer surface of the mold housing 8, generating a high-frequency shock wave that enters the molten metal inside the mold housing 8, which can break the formed bubbles and dendrite networks. S4: After the molten metal has completely solidified under the combined motion, stop the drive motor 12 and control the hydraulic cylinder 804 to retract. The extension end of the hydraulic cylinder 804 drives the moving rod 806 to move through the end plate 805. One end of the moving rod 806 pulls the stop seat 802 away from the opening of the mold housing 8, and the other end pushes the push plate 801 through the connector 9, thereby pushing the formed steel pipe casting out of the mold housing 8.

[0032] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0033] 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 casting device for alloy wear-resistant steel pipes, comprising an L-shaped base (1), characterized in that, Also includes: A movable seat (2) is mounted on an L-shaped base (1). A rotating rod (3) and an active rod (4) are rotatably mounted on the movable seat (2). A first transmission assembly is provided between the rotating rod (3) and the active rod (4). The connecting frame (5) is rotatably arranged with the rotating rod (3), and the active rod (4) is provided with a swing component for driving the connecting frame (5) to swing around the rotating rod (3) as the axis; The mold section is set on the connecting frame (5) and is used to pour molten liquid to form a tubular casting; The L-shaped base (1) is provided with a drive assembly for driving the active rod (4) to rotate. The drive assembly can drive the movable seat (2) to slide on the L-shaped base (1).

2. The alloy wear-resistant steel pipe casting device according to claim 1, characterized in that, The connecting frame (5) includes two collars (501) rotatably mounted on the rotating rod (3), a connecting rod (502) fixedly connected to each collar (501), and a mounting ring (503) mounted on the top of the connecting rod (502). A connecting plate (504) is provided between the two connecting rods (502).

3. The alloy wear-resistant steel pipe casting device according to claim 2, characterized in that, The first transmission assembly includes a first synchronous pulley (6) disposed on the rotating rod (3) and the driving rod (4) and a first synchronous belt disposed between the two first synchronous pulleys (6); The swing assembly includes an eccentric shaft (7) mounted on the active rod (4), a rotating ring (701) sleeved on the eccentric shaft (7), and a push-pull rod (702) fixedly connected to the rotating ring (701). The end of the push-pull rod (702) away from the rotating ring (701) is rotatably connected to the connecting plate (504) via a pin.

4. The alloy wear-resistant steel pipe casting device according to claim 3, characterized in that, The mold part includes a mold housing (8) rotatably disposed in the mounting ring (503), a push plate (801) and a stop (802) slidably connected to both ends of the inner wall of the mold housing (8), a side plate (803) fixed on the connecting rod (502), a hydraulic cylinder (804) mounted on the side plate (803), an end plate (805) disposed at the telescopic end of the hydraulic cylinder (804), and a moving rod (806) fixedly connected to the end plate (805). One end of the moving rod (806) is fixedly connected to the stop (802), and the end of the moving rod (806) away from the stop (802) is provided with a connecting piece (9) connected to the push plate (801). A pouring port (8021) is provided on the stop (802).

5. The alloy wear-resistant steel pipe casting device according to claim 4, characterized in that, The first ball tube (13) is movably connected inside the plug seat (802), and the second ball tube (14) is slidably connected to the outside of the first ball tube (13). The plug seat (802) is provided with a ball groove that matches the spherical structure of the first ball tube (13). The ball groove is connected to the pouring port (8021). The plug seat (802) is provided with a high-temperature resistant gate plate driven by an electric telescopic rod at the pouring port (8021).

6. The alloy wear-resistant steel pipe casting device according to claim 4, characterized in that, The connector (9) includes a movable plate (901) fixedly connected to one end of the movable rod (806), an annular groove (9011) opened on the movable plate (901), a slider (902) slidably connected in the annular groove (9011), and a push rod (903) connected between the slider (902) and the push plate (801).

7. The alloy wear-resistant steel pipe casting device according to claim 6, characterized in that, A second transmission assembly is provided between the rotating rod (3) and the mold housing (8). The second transmission assembly includes a second synchronous wheel (10) disposed on the rotating rod (3) and the mold housing (8) and a second synchronous belt disposed between the two second synchronous wheels (10).

8. The alloy wear-resistant steel pipe casting device according to claim 7, characterized in that, The mounting ring (503) is provided with a vibration assembly for striking the mold housing (8). The vibration assembly includes an upper reciprocating screw (11) rotatably mounted on the mounting ring (503), an upper sleeve (111) threadedly connected to the upper reciprocating screw (11), a moving ring (112) rotatably connected to the upper sleeve (111) and slidably connected to the upper reciprocating screw (11) through a keyway structure, and a striking hammer (113) mounted on the moving ring (112) and movingly abutting against the mold housing (8). The upper reciprocating screw (11) is provided with a driven gear (114), and the mold housing (8) is provided with a fixed gear (807) that meshes with the driven gear (114).

9. The alloy wear-resistant steel pipe casting device according to claim 8, characterized in that, The drive assembly includes a drive motor (12) fixed on an L-shaped base (1), a lower reciprocating screw (121) connected to the output shaft of the drive motor (12) and rotatably mounted on the L-shaped base (1), a lower sleeve (122) threadedly connected to the lower reciprocating screw (121), and a drive rod (123) disposed between the lower sleeve (122) and the movable seat (2). The lower reciprocating lead screw (121) is fixedly provided with a slide rod (124) which is slidably connected to the driving rod (4) through a keyway structure.

10. A method of using the alloy wear-resistant steel pipe casting device according to claim 9, characterized in that, Includes the following steps: S1: Pour the molten metal into the mold shell (8) through the pouring gate (8021), and close the pouring gate (8021) after pouring is completed. S2: Start the drive motor (12), and the output shaft of the drive motor (12) drives the reciprocating screw (121) to rotate; S3: The lower reciprocating screw (121) rotates to drive the lower sleeve (122) to move axially, and then drives the moving seat (2) and the entire mold part to slide axially back and forth along the L-shaped base (1) through the drive rod (123), so as to apply axial vibration to the molten liquid in the mold shell (8); While the reciprocating screw (121) rotates, it drives the slide bar (124) and the driving rod (4) to rotate. The driving rod (4) drives the rotating rod (3) to rotate through the first transmission component. The rotating rod (3) drives the mold housing (8) to rotate through the second transmission component, thereby generating centrifugal force in the molten metal. On the other hand, the driving rod (4) drives the connecting frame (5) to swing in a fan shape around the rotating rod (3) as the axis through the swing component, causing the mold housing (8) to swing in a head-shaking circumferential manner. The circumferential swing superimposes an inertial force with a periodically changing direction on the centrifugal force field. This dynamic force field can resist the particle sedimentation caused by density difference and shear the molten metal, destroying the bubble adhesion. When the mold housing (8) rotates, the fixed gear (807) on the outside meshes with the driven gear (114), causing the upper reciprocating screw (11) to rotate. The upper reciprocating screw (11) drives the upper sleeve (111), the moving ring (112), and the hammer (113) to move axially. At the same time, the moving ring (112) rotates with the upper reciprocating screw (11), causing the hammer (113) to periodically strike the mold housing (8). In conjunction with the rotation of the mold housing (8), the hammer (113) can perform a comprehensive striking action on the outer surface of the mold housing (8), generating a high-frequency shock wave that enters the molten metal inside the mold housing (8), which can break the formed bubbles and dendrite networks. S4: After the molten metal has completely solidified under the combined motion, stop the drive motor (12), control the hydraulic cylinder (804) to retract, and the extension end of the hydraulic cylinder (804) drives the moving rod (806) to move through the end plate (805). One end of the moving rod (806) pulls the stop (802) away from the mold shell (8) opening, and the other end pushes the push plate (801) through the connector (9), thereby pushing the formed steel pipe casting out of the mold shell (8).

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