无缝钢管热扩推制的调节系统
By introducing components such as an operation panel, PLC controller, and frequency converter into the seamless steel pipe hot expansion machine, real-time precise adjustment and automated control of the pipe pushing speed are achieved, solving the problem of inconvenient adjustment of the hydraulic pump station and improving production quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN WUFENG STEEL PIPE GENERAL FACTORY
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-17
AI Technical Summary
The existing hydraulic pump station adjustment method of seamless steel pipe hot expansion machine is inconvenient and makes it difficult to achieve precise adjustment of complex tube pushing speed curves, which affects production quality and yield.
It adopts components such as an operation panel, PLC controller, low-speed and high-speed frequency converters, servo oil pump, push cylinder, push plate trolley and reversing valve. The PLC controller realizes real-time precise adjustment and automatic control of the push tube speed. Combined with the retraction motor and high-pressure vane pump, it realizes high-speed retraction and reduces non-working time.
It enables rapid and precise adjustment of the hot expansion process of seamless steel pipes, improving product quality and yield, reducing non-working time, and increasing production efficiency.
Smart Images
Figure CN224508266U_ABST
Abstract
Claims
1. A regulating system for hot expansion pushback of seamless steel tubes, characterized by: It includes an operation panel (1), a PLC controller (2), a low-speed frequency converter (4), a high-speed frequency converter (5), a first speed-regulating motor (6), a first servo oil pump (7), a second speed-regulating motor (8), a second servo oil pump (9), a hydraulic oil tank (17), a reversing valve (21), a push cylinder (18), a push plate trolley (20), and a handwheel pulse generator (3); the operation panel (1) is connected to the PLC controller (2), and the low-speed frequency converter (4) and the high-speed frequency converter (5) are both connected to the PLC controller (2); The output end of the low-speed inverter (4) is connected to the first speed-regulating motor (6), which drives the first servo oil pump (7) to operate; the output end of the high-speed inverter (5) is connected to the second speed-regulating motor (8), which drives the second servo oil pump (9) to operate. The inlet of the first servo oil pump (7) and the inlet of the second servo oil pump (9) are respectively connected to the hydraulic oil tank (17) through pipelines. The outlet of the first servo oil pump (7) and the outlet of the second servo oil pump (9) are connected to the inlet of the reversing valve (21) through pipelines. The outlet of the reversing valve (21) is connected to multiple push cylinders (18) through pipelines. The multiple push cylinders (18) are arranged in parallel. The piston rod (19) of the push cylinder (18) is fixedly connected to the push plate trolley (20). The push plate trolley (20) is mounted on the ground track by rollers. The operation panel (1) is equipped with a handwheel pulse generator (3), which is also connected to the PLC controller (2). The signal emitted by the handwheel pulse generator (3) can be converted by the PLC controller (2) and transmitted to the low-speed inverter (4) and the high-speed inverter (5).
2. A regulating system for hot expansion pushback of seamless steel tubes according to claim 1, characterized in that: It also includes a retractable motor (10) and a high-pressure vane pump (11). The relay of the retractable motor (10) is connected to the PLC controller (2). The retractable motor (10) drives the high-pressure vane pump (11) to operate. The inlet of the high-pressure vane pump (11) is connected to the hydraulic oil tank (17) through a pipeline, and the outlet of the high-pressure vane pump (11) is connected to the inlet of the reversing valve (21) through a pipeline.
3. The regulating system for hot expansion and pushing of seamless steel pipe according to claim 1 or 2, characterized in that: A speed encoder (12) is installed between the pusher trolley (20) and the ground track, and the speed encoder (12) is connected to the PLC controller (2); a front limit switch (15) is installed at the extreme position of the pusher trolley (20) moving forward, and a rear limit switch (16) is installed at the extreme position of the pusher trolley (20) moving backward, and the front limit switch (15) and the rear limit switch (16) are respectively connected to the PLC controller (2); A pressure sensor (13) and a temperature sensor (14) are connected to the inlet pipeline of the reversing valve (21), and the pressure sensor (13) and the temperature sensor (14) are respectively connected to the PLC controller (2). The operation panel (1) is connected to a display screen (22). The signals collected by the PLC controller (2) from the speed encoder (12), the front limit switch (15), the rear limit switch (16), the pressure sensor (13), and the temperature sensor (14) can be converted and displayed on the display screen (22) of the operation panel (1).
4. A regulating system for hot expansion push straightening of seamless steel tubes according to claim 1 or 2, characterized in that: The inlet line of the reversing valve (21) is also connected to the hydraulic oil tank (17) through a return branch line, and an overflow valve (24) is installed on the return branch line.