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CN-224208803-U - Sizing and wall homogenizing device for pipe ends of large-caliber steel pipes

CN224208803UCN 224208803 UCN224208803 UCN 224208803UCN-224208803-U

Abstract

The utility model discloses a large-caliber steel pipe end sizing and wall homogenizing device which comprises a first hydraulic cylinder, wherein the output end of the first hydraulic cylinder is fixedly connected with a first connecting rod, the right side of the first connecting rod is fixedly connected with a baffle plate, the right side of the baffle plate is fixedly connected with a steel pipe body, the top and the bottom of the outer side of the back of the steel pipe body are respectively provided with a rotating roller, the top of the steel pipe body is provided with a grinding module, and the surface of the steel pipe body is wound with an intermediate frequency induction coil. The sizing wall-homogenizing device changes the phenomenon of low efficiency of the traditional diameter wall-homogenizing device, rolls the pipe end of the steel pipe body after heating, has small rolling force, reduces the requirement on a hydraulic power system, heats the pipe end of the steel pipe body through the medium-frequency induction coil, has high heating speed and convenient temperature control, and has a polishing module, so that the required part of the outer surface of the steel pipe body can be polished, and the adverse effect of oxide skin on the pipe end surface on the sizing wall-homogenizing is eliminated.

Inventors

  • WANG HONGHAI
  • XU SHENG
  • CHEN DONG
  • ZHU GUANGYA

Assignees

  • 德新钢管（中国）有限公司

Dates

Publication Date
20260508
Application Date
20250708

Claims (5)

  1. 1. The utility model provides a heavy-calibre steel pipe end sizing equal wall device, includes hydraulic cylinder one (1), its characterized in that, the output fixedly connected with first connecting rod (2) of hydraulic cylinder one (1), the right side fixedly connected with baffle (3) of first connecting rod (2), the right side fixedly connected with steel pipe body (4) of baffle (3), the top and the bottom in steel pipe body (4) back outside all are provided with rotor roll (5), the top of steel pipe body (4) is provided with coping module (6), the surface winding of steel pipe body (4) has intermediate frequency induction coil (7), the right side at steel pipe body (4) top is provided with initiative roller (8), the right side of steel pipe body (4) bottom is provided with driven roller (9), the right side of steel pipe body (4) is provided with mandrel (10), the back of mandrel (10) is provided with conveying roller (11), the right side of mandrel (10) is provided with shaft coupling (12), the right side of shaft coupling (12) is provided with second (13), the right side of second cylinder (14) is provided with second connecting rod (14) hydraulic cylinder (14) and hydraulic cylinder (14), and a steel pipe limiting assembly (15) is arranged on the right side of the surface of the steel pipe body (4).
  2. 2. The large-caliber steel pipe end sizing and wall homogenizing device according to claim 1, wherein the core mold (10) comprises a conical section (101), a sizing section (102) and a connecting plate (103), the conical section (101) is positioned on the left side of the outer side of the core mold (10), the sizing section (102) is positioned on the outer side of the core mold (10), and the connecting plate (103) is positioned on the right side of the core mold (10).
  3. 3. The sizing wall-homogenizing device for the pipe end of the large-caliber steel pipe, as claimed in claim 2, is characterized in that the cone angle alpha of the conical section (101) is 8-12 degrees, the connecting part of the conical section (101) and the sizing section (102) is in smooth transition, and the outer diameter deviation of the sizing section (102) is smaller than +/-0.1 mm.
  4. 4. The sizing and wall homogenizing device for the pipe end of the large-caliber steel pipe as claimed in claim 2, wherein the diameter of the small end of the conical section (101) is 30-50 mm smaller than the inner diameter of the inner pipe.
  5. 5. The large-caliber steel pipe end sizing and homogenizing device according to claim 2, wherein the outer diameter of the sizing section (102) is equal to the diameter of the steel pipe body (4) when the pipe end is not heated, the length L of the sizing section (102) is L=L1+W1+ (50-80) mm, L1 is the length of the steel pipe body (4) pipe end needing sizing and homogenizing wall, W1 is the width of the driving roller (8), and the width W2 of the driven roller (9) is equal to the length L of the sizing section (102).

Description

Sizing and wall homogenizing device for pipe ends of large-caliber steel pipes Technical Field The utility model relates to the technical field of metal forming processing, in particular to a sizing and wall homogenizing device for the pipe end of a large-caliber steel pipe. Background In the long-distance gathering and transportation pipeline, a welding pipeline steel pipe is usually used, compared with a seamless steel pipe, the welding steel pipe has the advantages of uniform wall thickness, high pipe end size precision and easiness in butt joint connection, but in the field of acid medium transportation, such as high-sulfur natural gas, an acid medium is easy to form Hydrogen Induced Cracking (HIC) and hydrogen Sulfide Stress Corrosion (SSC) at a weld joint defect part, especially along with large-scale popularization and application of hydrogen energy, green hydrogen prepared by solar energy and wind energy in northwest areas needs to be transported to coastal industrial areas, the construction of a long-distance hydrogen transportation pipeline network is forced to be urgent, and because the weld joint of the welding steel pipe is easy to generate processing defects and gathers nonmetallic inclusions, the hydrogen embrittlement sensitivity of the weld joint to high-pressure hydrogen is increased, so that the long-distance transportation pipeline is used for hydrogen and acid service environments; According to the published patent of the Chinese patent network, the patent name is 201310422486.3, the method comprises the steps of reasonable proportioning of steel types, steelmaking, PQF continuous rolling, 720EM skew rolling and spin-expansion, tempering and processing, the method has the advantages that the contribution of residual elements to the performance is utilized, the component control is reasonably regulated, the gathering and conveying pipe suitable for the high-sulfur hydrogen sulfide environment is obtained through a rolling technology of skew rolling and spin-expansion and a unique heat treatment technology, the requirement on strength under the gathering and conveying high operating pressure is met, the requirement on the sizing performance of an acid environment for resisting the corrosion performance of hydrogen sulfide is met, the pipe body has good physical and chemical properties, the pipe body has high dimensional precision, the method is convenient to apply and facilitate the safety of conveying pipes, the method can be widely applied to an acid oil-gas field with high hydrogen sulfide content, however, after the seamless steel pipe is cooled by four groups of rollers, the outer diameter precision of the steel pipe is +/-0.75 percent D, the precision is +/-12.5 percent T, the error side quantity is large when the seamless steel pipe is in butt joint, the butt joint is inconvenient to the butt joint, the sizing is difficult to realize the welding, the sizing precision is difficult to realize by using a sizing mill in a high-diameter sizing mill, the high-sizing system is controlled by a sizing mill, and the high-dimensional precision of a high-quality sizing system can not be easily controlled by using a high-quality sizing mill, and a high-quality industrial pipeline can not realize the high-quality control system is required by using a high-quality sizing system, and a high-quality sizing system is difficult to realize by using a high-quality control system for manufacturing device; Therefore, the sizing wall-homogenizing device needs to be designed and improved, and the phenomenon of low sizing wall-homogenizing efficiency is effectively prevented. Disclosure of utility model In order to solve the problems in the prior art, the utility model aims to provide a sizing and wall-homogenizing device for a large-caliber steel pipe end, which has the advantages of being capable of rapidly improving the dimensional accuracy of the steel pipe end, including the diameter, the wall thickness and the out-of-roundness, and solves the problem that the sizing and wall-homogenizing efficiency of the steel pipe end is too slow. The large-caliber steel pipe end sizing and wall homogenizing device comprises a first hydraulic cylinder, wherein the output end of the first hydraulic cylinder is fixedly connected with a first connecting rod, the right side of the first connecting rod is fixedly connected with a baffle plate, the right side of the baffle plate is fixedly connected with a steel pipe body, the top and the bottom of the outer side of the back of the steel pipe body are both provided with rotating rollers, the top of the steel pipe body is provided with a grinding module, the surface of the steel pipe body is wound with an intermediate frequency induction coil, the right side of the top of the steel pipe body is provided with an active roller, the right side of the bottom of the steel pipe body is provided with a driven roller, the right side of the steel pipe body is provided with a core d