Heating system for drill steel pipe billet and heating method thereof

Patent metadata

Field	Value
Publication number	US-11565294-B2
Application number	US-202117213773-A
Country	US
Kind code	B2
Filing date	Mar 26, 2021
Priority date	Mar 31, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A heating system for drill steel pipe billet includes a feedback device configured to control distances d1 and d2 of three flamethrowers, a propulsion device, a positioning device, a heating device, a temperature measuring device and a conveying device. Heating temperature of the flamethrowers is controlled by an oxygen distribution box and a gas distribution box. A heating method for the drill steel pipe billet is also provided, in which a rolling forming method of gradient flame heating is adopted to control density of the rolled pieces and avoid internal defects of the drill steel caused by the same deformation of the traditional uniformly heated pipe billets. A radial temperature of the drill steel pipe billet is accurately controlled through the feedback device. Only one set of flamethrowers corresponding to drill steel pipe billets of different dimensions is required, and other devices are universal components, which will not be replaced.

First claim

What is claimed is:

1. A heating system for drill steel pipe billet, comprising a propulsion devices, positioning devices, a heating device and a temperature measuring device,
each of the propulsion devices includes an electric motor, a shrink cylinder, a propulsion rod, a propulsion slider, a propulsion bracket, a connecting rod, a propulsion chute, and a propulsion base, the propulsion chute is disposed on the propulsion base, and the electric motor is installed on the propulsion base, the shrink cylinder is connected to the electric motor, a first end of the propulsion rod is connected to the shrink cylinder, a second end of the propulsion rod is connected to the propulsion slider, and the propulsion slider is installed on the propulsion chute, a first end of the propulsion bracket is installed on the propulsion slider, a second end of the propulsion bracket is connected with the connecting rod; the connecting rod is connected with the pipe clamp, the pipe clamp is configured to fix a gas pipeline, and the propulsion devices are installed on left and right respectively; the electric motor controls the propulsion rod to move back and forth in the shrink cylinder, the propulsion rod propels the propulsion slider to move in the propulsion chute, and the propulsion slider finally acts on the gas pipeline through the motion transfer of the propulsion bracket, the connecting rod and the pipe clamp, and the gas pipeline propels respective flamethrowers to move back and forth on the guide rod, which results in a change in a high-medium temperature distance d 1 between a high-temperature flamethrower and a medium-temperature flamethrower and a medium-low temperature distance d 2 between the medium-temperature flamethrower and a low-temperature flamethrower;
each of the positioning device includes a main body base, a positioning chute, a wing nut, a positioning shrink cylinder, a positioning frame, a trapezoidal plate, a rotating link, a nut, and a threaded rod, the positioning chute is provided on the main body base, the positioning shrink cylinder is installed on the positioning chute, the wing nut is installed on the side of the positioning shrink cylinder, the positioning frame is installed on the positioning shrink cylinder, and a first end of the rotating link is fixed on the positioning frame, a second end of the rotating link is fixed on the trapezoidal plate, the threaded rod is fixedly connected under the trapezoidal plate, and the threaded rod passes through the main body base and is provided with the nut below the main body base; the positioning devices are installed at the front and rear respectively, and the threaded rod is moveable up and down through the rotation of the nut; the threaded rod drives the trapezoidal plate to move up and down, the up and down movement of the trapezoidal plate drives the rotation of the rotating link, and the rotation of the rotating link drives the clamping and loosening of the positioning frame, thereby realizing the positioning of the guide rod; the positioning frame is moveable up and down in the positioning shrink cylinder, so that the positions of the high-temperature flamethrower, the medium-temperature flamethrower, and the low-temperature flamethrower are all aligned with the center of the inner hole of the drill steel pipe billet; the positioning frame is fixed by tightening the wing nut, and the positioning shrink cylinder is slideable in the positioning chute;
the heating device includes the low-temperature flamethrower, the medium-temperature flamethrower, and the high-temperature flamethrower arranged on the guide rod at intervals in sequence, and the low-temperature flamethrower, the medium-temperature flamethrower, and the high-temperature flamethrower each include a flame nozzle, an outer wall, a cavity, an oxygen hole, an upper pipe perforation, an inner wall, a gas hole, a lower pipe perforation and a combustion-supporting port; a plurality of flame nozzles are provided on the outer wall, and the cavity is provided between the outer wall and the inner wall; the cavity is provided with the oxygen hole, the gas hole and the combustion-supporting port; the inner side of the inner wall is provided with a through hole, and the through hole is divided into the upper pipe perforation and the lower pipe perforation by the guide rod;
the temperature measuring device includes an infrared thermometer for point A, an infrared thermometer for point B, a temperature measuring plate and a temperature measuring bracket, and the infrared thermometer for point A and the infrared thermometer for point B are fixed on the temperature measuring plate to measure the temperature of point A and point B, respectively; the points A and B respectively represent the outside and inside of the drill steel pipe billet; the temperature measuring plate is fixed on the temperature measuring bracket, and the temperature measuring bracket is installed on the main body base.

2. The heating system for drill steel pipe billet according to claim 1 , wherein the heating device further comprises an oxygen cylinder, an oxygen delivery pipe, an oxygen distribution box, a low-temperature oxygen delivery telescopic pipe, a medium-temperature oxygen delivery telescopic pipe, a high-temperature oxygen delivery telescopic pipe, a gas distribution box, a gas cylinder, a gas delivery pipe, a low-temperature gas telescopic pipe, a medium-temperature gas telescopic pipe, a high-temperature gas telescopic pipe, a low-temperature gas pipe, a medium-temperature gas pipe, a high-temperature gas pipe, a low-temperature oxygen delivery pipe, a medium-temperature oxygen delivery pipe and a high-temperature oxygen delivery pipe, the oxygen cylinder is connected to the oxygen distribution box through the oxygen delivery pipe, the low-temperature oxygen delivery telescopic pipe is installed on the oxygen distribution box, and a first end of the low-temperature oxygen delivery pipe is connected to the low-temperature oxygen delivery telescopic pipe, a second end of the low-temperature oxygen delivery pipe is installed on the low-temperature flamethrower; the medium-temperature oxygen delivery telescopic pipe is installed on the oxygen distribution box, and a first end of the medium-temperature oxygen delivery pipe is connected to the medium-temperature oxygen delivery telescopic pipe, a second end of the medium-temperature oxygen delivery pipe is installed on the medium-temperature flamethrower; the high-temperature oxygen delivery telescopic pipe is installed on the oxygen distribution box, and a first end of the high-temperature oxygen delivery pipe is connected to the high-temperature oxygen delivery telescopic pipe, a second end of the high-temperature oxygen delivery pipe is installed on the high-temperature flamethrower; the gas cylinder is connected to the gas distribution box through the gas delivery pipe, and the low-temperature gas telescopic pipe is installed at on the gas distribution box, a first end of the low-temperature gas pipe is connected to the low-temperature gas telescopic pipe, and a second end of the low-temperature gas pipe is installed on the low-temperature flamethrower; the medium-temperature gas telescopic pipe is installed on the gas distribution box, a first end of the medium-temperature gas pipe is connected to the medium-temperature gas telescopic pipe, and a second end of the medium-temperature gas pipe is installed on the medium-temperature flamethrower; the high-temperature gas a telescopic pipe is installed on the gas distribution box, a first end of the high-temperature gas pipe is connected with the high-temperature gas telescopic pipe, and a second end of the high-temperature gas pipe is installed on the high-temperature flamethrower; the oxygen hole is connected with a corresponding oxygen delivery pipe, the gas hole is connected with a corresponding gas pipe, and the o

Assignees

• Univ Yanshan

Inventors

• Gao Xinliang
• Niu Shenshen

Classifications

• B21B2261/20

  Temperature · CPC title

• B21B38/006

  for measuring temperature · CPC title

• B23K7/10

  Auxiliary devices, e.g. for guiding or supporting the torch · CPC title

• B21B37/74

  Temperature control, e.g. by cooling or heating the rolls or the product (B21B37/32, B21B37/44 take precedence) · CPC title

• C21D1/08

  with flames · CPC title