CN215487463U

CN215487463U - Seamless steel pipe slewing arm control device

Info

Publication number: CN215487463U
Application number: CN202121644387.6U
Authority: CN
Inventors: 庞斌; 孙海强; 程伟
Original assignee: Shanxi Zhuolibai Electrical Co ltd
Current assignee: Shanxi Zhuolibai Electrical Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-01-11
Anticipated expiration: 2031-07-20

Abstract

The utility model relates to the field of mechanical transmission. The utility model provides a seamless steel pipe gyration arm controlling means, includes first motor (1), second motor (7), first reduction gear (2) of connecting first motor (1), second reduction gear (6) of connecting second motor (7), first reduction gear output shaft passes through first clutch (4) and connects second reduction gear output shaft, first gyration arm is connected through first gear (3) on the first reduction gear output shaft, second gyration arm is connected through second gear (5) on the second reduction gear output shaft. The utility model solves the problems of flexibility of independent action and torque balance distribution of simultaneous action of two revolving arms, increases the flexibility of equipment, facilitates production organization and improves the production efficiency.

Description

Seamless steel pipe slewing arm control device

Technical Field

The utility model relates to the field of mechanical transmission.

Background

The hot rolling line of seamless steel pipes can be mainly divided into a hot rolling line of skew rolling seamless steel pipes, a hot rolling line of continuous rolling (longitudinal rolling) seamless steel pipes and a pipe jacking line according to different rolling modes. The continuous rolling production line has high steel pipe yield and good quality, and plays an important role in the production mode of seamless steel pipes.

The length of the steel pipe at the inlet side of the cooling bed of the seamless steel pipe continuous rolling production line is 26-60 meters, and in order to meet the requirements of feeding different lengths of the steel pipe at the inlet side of the cooling bed and improving the production rhythm, two rotary arms are required to be arranged at the inlet of the cooling bed and can act independently or simultaneously. Because the requirements of steel pipes made of different materials and different lengths on power are different, the requirement of processing all the steel pipes on the power required for providing the maximum requirement for each rotary arm is met, so that on one hand, energy is wasted, and on the other hand, a high-power motor and a speed reducer are high in cost and easy to damage.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: how to make every gyration arm demand power can satisfy the power needs when hour, can jointly provide torsion and satisfy the power needs jointly when demand power is big.

The technical scheme adopted by the utility model is as follows: the utility model provides a seamless steel pipe gyration arm controlling means, includes first motor (1), second motor (7), first reduction gear (2) of connecting first motor (1), second reduction gear (6) of connecting second motor (7), first reduction gear output shaft passes through first clutch (4) and connects second reduction gear output shaft, first gyration arm is connected through first gear (3) on the first reduction gear output shaft, second gyration arm is connected through second gear (5) on the second reduction gear output shaft.

When the clutch (4) is closed, the output shaft of the first speed reducer is rigidly meshed with the output shaft of the second speed reducer.

When the clutch (4) is opened, the output shaft of the first speed reducer is not meshed with the output shaft of the second speed reducer.

The end of the output shaft of the first speed reducer is connected with a third gear (8), the end of the output shaft of the second speed reducer is connected with a fourth gear (9), the center lines of the output shafts of the first speed reducer and the second speed reducer are collinear, the first clutch (4) comprises a fifth gear (10) and a sixth gear (11), the fifth gear (10) and the sixth gear (11) are fixedly installed on the same shaft, when the clutch (4) is closed, the fifth gear (10) is meshed with the third gear (8), and the sixth gear (11) is meshed with the fourth gear (9).

The first motor (1) and the second motor (7) are separately excited direct current motors with the same model, and the first speed reducer (2) and the second speed reducer (6) are four-quadrant direct current speed regulators with the same model.

The utility model has the beneficial effects that: the utility model solves the problems of flexibility of independent action and torque balance distribution of simultaneous action of two revolving arms, increases the flexibility of equipment, facilitates production organization and improves the production efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic illustration of a first clutch configuration;

the motor comprises a motor body, a first motor, a second motor, a first speed reducer, a first gear, a first clutch, a second gear, a second speed reducer, a second motor, a third gear, a fourth gear, a fifth gear, a sixth gear, a third gear, a fourth gear, a fifth gear, a sixth gear and a fourth gear, wherein the first motor, the first gear, the second gear, the first speed reducer, the first gear, the second speed reducer, the second motor, the third gear, the fourth gear, the fifth gear, the sixth gear and the fourth gear are sequentially arranged.

Detailed Description

A control system of a seamless steel tube rotary arm is shown in figure 1 and comprises a first speed reducer, a second speed reducer and a clutch, wherein the clutch is arranged in the middle of an output shaft of the first speed reducer and an output shaft of the second speed reducer, and is used for controlling the connection and disconnection of the output shaft of the first speed reducer and the output shaft of the second speed reducer. The two rotary arms are arranged on the inlet side of the cooling bed and are respectively connected with a first gear and a second gear.

Each speed reducer is driven by a separately excited direct current motor; each motor is controlled by a four-quadrant direct current speed regulator. The motor drives the rotary arm to do circular rotary motion.

Each motor is controlled by a four-quadrant direct current speed regulator, each motor is provided with a speed feedback encoder so as to realize high-precision speed control, and each motor can be driven independently or two motors can be driven in parallel.

The control system of each motor is driven by a direct current speed regulating device, the rated direct current voltage DC420V, the rated direct current about 210A and the maximum direct current about 378A of each direct current speed regulating device.

The motor is a separately excited direct current motor, the rated voltage is 400V, the rated rotating speed is 750rpm, the highest rotating speed is 1400rpm, and the rotating speed section of 750-1400 rpm is a field weakening speed regulating section.

The slewing arm transmission motors are two sets of mutually independent transmission systems, when two slewing arms act simultaneously, the clutch closes two reducer output shafts to be rigidly meshed, the speeds of the motors must be the same, and if the two motors are used for independent speed control, the torque of each motor is difficult to ensure balance and consistency in the operation process.

The two direct current speed adjusting devices are connected through a communication interface, the two direct current speed adjusting devices can be set as independent main control devices respectively, or can be set as a main control device and a slave control device respectively, and each direct current speed adjusting device drives one motor respectively. When the two rotary arms act independently, the clutch is opened, and the two control systems work in a speed ring. When the two revolving arms act simultaneously, the clutch is closed, the master control device and the slave control device are in communication connection to complete the torque distribution of the two motors, so that one motor control system of the two motors works as a master motor in a speed ring, and the other motor works as a slave motor to receive a torque set value from the master motor in a torque ring.

The master control device and the slave control device both adopt direct current speed regulating devices, and the communication mode adopts serial port communication, so that high-speed communication between the two devices is realized. The main task of the communication is to complete the torque distribution of four motors and realize master-slave control; and secondly, completing the fault linkage of the two control units and the four motors.

And (3) transmission control: when the two rotary arms act simultaneously and the clutches are closed, the output ends of the two motor shafts are rigidly connected, so that the transmission system performs synchronous control of a master and a slave so as to realize the average distribution of torque. Selecting a first motor control system as a main unit and working in a speed ring; the other motor control system receives a given torque value from the main motor and works in a torque ring; the given value of torque selects the main motor torque setting.

Sudden stop control: due to the reciprocating operation of the rotary arm, if the rotary arm cannot be stopped in time in an abnormal state, equipment damage is likely to be caused. For this reason, special handling is required for sudden stop of the motor and the like. When the two revolving arms act independently, the two direct current speed adjusting devices are controlled by an emergency stop signal sent by the PLC; when the two rotary arms act simultaneously, in order to ensure the torque balance of the two systems, only the master device is controlled by a PLC emergency stop signal, the other slave device is not controlled by the emergency stop signal, and the two motors still keep master-slave control in the emergency stop process.

By the control mode, the torque balance distribution of the two motors in simultaneous operation is ensured, the effect of master-slave control is achieved, the flexibility of independent operation of the two motors can be realized, the production organization is convenient, and the production efficiency is improved.

Claims

1. The utility model provides a seamless steel pipe gyration arm controlling means which characterized in that: the device comprises a first motor (1), a second motor (7), a first speed reducer (2) connected with the first motor (1) and a second speed reducer (6) connected with the second motor (7), wherein an output shaft of the first speed reducer is connected with an output shaft of the second speed reducer through a first clutch (4), the output shaft of the first speed reducer is connected with a first rotary arm through a first gear (3) on the output shaft of the first speed reducer, and the output shaft of the second speed reducer is connected with a second rotary arm through a second gear (5) on the output shaft of the second speed reducer.

2. The seamless steel pipe slewing arm control device according to claim 1, characterized in that: when the first clutch (4) is closed, the output shaft of the first speed reducer is rigidly meshed with the output shaft of the second speed reducer.

3. The seamless steel pipe slewing arm control device according to claim 1, characterized in that: when the first clutch (4) is opened, the output shaft of the first speed reducer is not meshed with the output shaft of the second speed reducer.

4. The seamless steel pipe slewing arm control device according to claim 1, characterized in that: the end of the output shaft of the first speed reducer is connected with a third gear (8), the end of the output shaft of the second speed reducer is connected with a fourth gear (9), the center lines of the output shafts of the first speed reducer and the second speed reducer are collinear, the first clutch (4) comprises a fifth gear (10) and a sixth gear (11), the fifth gear (10) and the sixth gear (11) are fixedly installed on the same shaft, when the clutch (4) is closed, the fifth gear (10) is meshed with the third gear (8), and the sixth gear (11) is meshed with the fourth gear (9).

5. The seamless steel pipe slewing arm control device according to claim 1, characterized in that: the first motor (1) and the second motor (7) are separately excited direct current motors with the same model, and the first speed reducer (2) and the second speed reducer (6) are four-quadrant direct current speed regulators with the same model.