Large-diameter composite steel pipe nesting traction head

Abstract

A large-diameter composite steel pipe nesting traction head comprises a supporting base, a plurality of supporting pieces abutting against the inner wall of a steel pipe are arranged on the supporting base, and each supporting piece is of an arc-shaped structure attached to the inner wall of the steel pipe; an adjusting mechanism used for adjusting the distance between the supporting piece and the supporting base is arranged on the supporting piece, and a universal rotating ball joint used for being connected with a traction head conveying steel pipe is arranged on one side of the supporting piece; compared with the prior art, due to the fact that the supporting pieces arranged on the supporting base abut against the inner wall of the steel pipe, and the supporting pieces are each of an arc-shaped structure attached to the inner wall of the steel pipe, it is guaranteed that the inner wall of the steel pipe cannot be damaged in the nesting process, and in addition, the adjusting mechanisms are arranged on the supporting pieces; and the distance between the supporting piece and the supporting base can be adjusted under the action of the adjusting mechanism, so that the requirement for nesting work of steel pipes with different calibers is met, and the applicability of the traction head to nesting of the large-caliber steel pipes is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, and particularly relates to a large-diameter composite steel pipe nested towing head. Background Art

[0002] When producing lined composite pipes, according to the process requirements, stainless steel or nickel alloy steel pipes need to be nested inside the processed base pipes. This process is called pipe nesting or casing. During the nesting process, protecting the inner wall of the base pipe or the outer wall of the liner pipe from damage is an important technical challenge. Damage can be caused by various factors, including physical collision, abrasion, or other mechanical actions.

[0003] Chinese Patent with the application number 202010688470.7 discloses a docking device for a traction device used in the processing of construction steel pipes. The above-disclosed docking device includes a positioning and fixing pipe, and the left side of the positioning and fixing pipe is inserted into the inside of the steel pipe. Chinese Patent with the application number 202310141848.5 discloses a casing traction recovery device and method. The above-disclosed traction recovery device includes a traction mechanism and a support mechanism. The traction mechanism includes a traction rod and a lifting hook. The lifting hook is fixed to the bottom of the traction rod. The traction rod extends into the inside of the casing, and the lifting hook passes through the casing and corresponds to the pipe wall at the tail of the casing. The support mechanism includes multiple groups of telescopic support plates, which are evenly spaced along the axial direction of the traction rod and are in contact with the inner wall of the casing.

[0004] In the above-disclosed prior art, by inserting the positioning and fixing pipe into the inner wall of the steel pipe and making the engaging and fixing semi-sleeve abut against the outer wall of the steel pipe, and using the frictional resistance between the engaging and fixing semi-sleeve and the steel pipe, the outside of the steel pipe is extruded and positioned and fixed, so as to realize the nesting of the steel pipe. However, the above method is likely to damage the steel pipe, and at the same time, it is not applicable to applications with a larger diameter (inner diameter > 600 mm). Summary of the Utility Model

[0005] The utility model is to overcome the above defects in the prior art and provides a large-diameter composite steel pipe nested towing head that is applicable to the nesting of large-diameter steel pipes and will not damage the steel pipes.

[0006] To achieve the above utility model purpose, the utility model adopts the following technical solutions: A large-diameter composite steel pipe nested towing head includes a support base. A number of support members that abut against the inner wall of the steel pipe are provided on the support base. The support members are arc-shaped structures that fit the inner wall of the steel pipe. An adjusting mechanism for adjusting the distance between the support members and the support base is provided on the support members. A universal rotating ball joint for connecting the towing head to transport the steel pipe is provided on one side of the support members.

[0007] As a preferred solution of the utility model, a number of the support members are arranged along the circumferential direction of the support base.

[0008] As a preferred embodiment of the present utility model, the adjusting mechanism includes a fixed seat disposed on the circumference of the support base and a connecting member disposed on the inner wall of the support member, and the connecting member is slidably connected to the fixed seat.

[0009] As a preferred embodiment of the present utility model, an adjusting bolt for adjusting the distance between the support member and the support base is provided at the end of the fixed seat.

[0010] As a preferred embodiment of the present utility model, an adjusting hole is formed at the end of the fixed seat, and the adjusting bolt passes through the adjusting hole and is connected to the connecting member.

[0011] As a preferred embodiment of the present utility model, sliding grooves for limiting the adjusting distance of the connecting member are provided on both sides of the connecting member along the sliding direction of the connecting member.

[0012] As a preferred embodiment of the present utility model, a fastening bolt for fastening the connecting member and the fixed seat is provided in the sliding groove, and a bolt hole for connecting the fastening bolt is formed on the side surface of the fixed seat.

[0013] As a preferred embodiment of the present utility model, a mounting seat for fixing the universal rotating ball joint is provided on the connecting member, the mounting seat is arranged along the axial direction of the support base, and the universal rotating ball joint moves synchronously with the support member.

[0014] As a preferred embodiment of the present utility model, a joint seat for mounting the universal rotating ball joint is provided on the mounting seat, and the universal rotating ball joint is slidably connected to the joint seat.

[0015] As a preferred embodiment of the present utility model, when the support member abuts against the inner wall of the steel pipe, the universal rotating ball joint is located outside the steel pipe.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By arranging a plurality of support members on the support base to abut against the inner wall of the steel pipe, and the support members are arc-shaped structures that fit the inner wall of the steel pipe, it is ensured that the inner wall of the steel pipe will not be damaged during the nesting process. In addition, an adjusting mechanism is provided on the support member, and under the action of the adjusting mechanism, the distance between the support member and the support base can be adjusted, thereby meeting the nesting work for steel pipes of different diameters and improving the applicability of the traction head for nesting large-diameter steel pipes;

[0018] 2. Further, through the cooperation of the connecting member and the fixing base, turn the adjusting bolt to move the connecting member. After the adjustment is completed, fix it with the fastening bolt. At this time, the supporting member abuts against the inner wall of the steel pipe, so that the towing head can be applicable to steel pipes of different calibers. At the same time, through the adjustment of the connecting member by the adjusting bolt, the supporting member is further made to fit the inner wall of the steel pipe, ensuring that the supporting member will not damage the inner wall of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a side view of the present utility model

[0021] Reference numerals: support base 1, support member 2, universal rotating ball joint 3, joint seat 301, adjusting mechanism 4, connecting member 401, chute 4011, fastening bolt 402, adjusting bolt 403, mounting seat 404, fixing base 405, bolt hole 4051, adjusting hole 4052. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will describe in detail the embodiments of the present utility model with reference to the drawings.

[0023] The towing head of the present utility model is applicable to the liner nesting of bimetal composite pipes to prevent damage to the inner wall of the base pipe or the outer wall of the liner during the nesting process, and is applicable to the nesting of steel pipes with an inner diameter of about 600 - 1000 mm.

[0024] As Figure 1 - Figure 2 shown, a large-diameter composite steel pipe nesting towing head includes a support base 1. A plurality of support members 2 that abut against the inner wall of the steel pipe are provided on the support base 1. The support members 2 are arc-shaped structures that fit the inner wall of the steel pipe; an adjusting mechanism 4 for adjusting the distance between the support members 2 and the support base 1 is provided on the support members 2, and a universal rotating ball joint 3 for connecting the towing head to transport the steel pipe is provided on one side of the support members 2.

[0025] Further, the support base 1 is a cylindrical structure, and a plurality of support members 2 are all arranged on the side wall of the cylindrical structure. In this embodiment, four support members 2 are provided, and these four support members 2 are arranged at the upper, lower, left, and right positions of the support base 1, so as to achieve uniform support for the inner wall of the steel pipe; in addition, the support members 2 are arc-shaped structures, and the arc-shaped support members 2 provide uniform support for the inner wall of the steel pipe, reducing the pressure points, and further reducing the deformation of the liner generated during the nesting process.

[0026] Specifically, a plurality of support members 2 are arranged along the circumferential direction of the support base 1, and a plurality of support members 2 are evenly distributed, and the curved surfaces where the outer walls of the plurality of support members 2 are located form a circular structure, and this circular structure is adapted to the inner wall of the steel pipe.

[0027] The adjusting mechanism 4 includes a fixed seat 405 arranged on the circumference of the support base 1 and a connecting member 401 arranged on the inner wall of the support member 2. The connecting member 401 is slidably connected to the fixed seat 405. Further, the fixed seat 405 is fixedly arranged on the outer wall of the support base 1, and the connecting member 401 is fixedly arranged on the inner wall of the support member 2. The connecting member 401 is connected to the fixed seat 405, and the connecting member 401 moves on the fixed seat 405.

[0028] An adjusting bolt 403 for adjusting the distance between the support member 2 and the support base 1 is provided at the end of the fixed seat 405. Further, the adjusting bolt 403 is connected to the end of the support member 2. Specifically, an adjusting hole 4052 is formed at the end of the fixed seat 405, and the adjusting bolt 403 passes through the adjusting hole 4052 and is connected to the connecting member 401. By turning the adjusting bolt 403, the connecting member 401 moves on the fixed seat 405 in the radial direction of the support base 1, so as to realize the adjustment of the distance between the support member 2 and the support base 1, and further enable the support member 2 to be applicable to steel pipes with different inner diameters.

[0029] Chute grooves 4011 for limiting the adjusted distance of the connecting member 401 are arranged on both sides of the connecting member 401 along the sliding direction of the connecting member 401. Further, the chute grooves 4011 are arranged on the opposite sides of the connecting member 401, and the chute grooves 4011 are arranged in the radial direction of the support base 1. In addition, fastening bolts 402 for fastening the connecting member 401 and the fixed seat 405 are arranged in the chute grooves 4011. A bolt hole 4051 for connecting the fastening bolt 402 is formed on the side surface of the fixed seat 405. After the position of the support member 2 is adjusted, the fastening bolt 402 is turned to fix the connecting member 401 and the fixed seat 405, so as to keep the distance between the support member 2 and the support base 1 unchanged, and improve the stability of the support of the inner wall of the steel pipe by the support member 2.

[0030] An installation seat 404 for fixing the universal rotating ball joint 3 is arranged on the connecting member 401. The installation seat 404 is arranged along the axial direction of the support base 1, and the universal rotating ball joint 3 moves synchronously with the support member 2. Further, the installation seat 404 is arranged on the side surface of the connecting member 401, and the installation seat 404 is located outside the support member 2. In addition, a joint seat 301 for installing the universal rotating ball joint 3 is arranged on the installation seat 404. The universal rotating ball joint 3 is slidably connected to the joint seat 301. Specifically, when the support member 2 abuts against the inner wall of the steel pipe, the universal rotating ball joint 3 is located outside the steel pipe, thus ensuring that the universal rotating ball joint 3 does not contact the steel pipe and avoiding damage to the steel pipe caused by the universal rotating ball joint 3.

[0031] This device is mainly applied to the process of lining tube nesting of bimetal composite pipes. Specifically, first, loosen the fastening bolt 402 and prepare to install the traction head onto the mouth of the lining tube; place the support member 2 inside the lining tube and ensure that the universal rotating ball joint 3 is outside the mouth of the lining tube; next, adjust the position of the support member 2 by turning the adjusting bolt 403 to make the support member 2 closely adhere to the inner wall of the lining tube; after the adjustment is completed, tighten the fastening bolt 402 again to ensure that the support base 1 and the support member 2 are firmly connected and avoid loosening; finally, send the end of the lining tube assembled with the traction head into the base tube for subsequent processing.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0033] Although the terms such as support base 1, support member 2, universal rotating ball joint 3, joint seat 301, adjustment mechanism 4, connecting member 401, sliding groove 4011, fastening bolt 402, adjusting bolt 403, mounting seat 404, fixing seat 405, bolt hole 4051, adjustment hole 4052 and other terms of the reference numerals in the drawings are used more in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A large-diameter composite steel pipe nested traction head, characterized in that: The invention comprises a support base (1), wherein the support base (1) is provided with a plurality of support members (2) abutting against the inner wall of a steel pipe, and the support member (2) is an arc-shaped structure fitted with the inner wall of the steel pipe; the support member (2) is provided with an adjustment mechanism (4) for adjusting the distance between the support member (2) and the support base (1); and a universal rotating ball joint (3) for connecting a traction head to transport the steel pipe is provided on one side of the support member (2).

2. A large-diameter composite steel pipe nested traction head according to claim 1, characterized in that: The plurality of support members (2) are arranged along the circumferential direction of the support base (1).

3. The large-diameter composite steel pipe nested traction head according to claim 1, characterized in that: The adjustment mechanism (4) comprises a fixing seat (405) arranged on the circumference of the support base (1) and a connecting member (401) arranged on the inner wall of the support member (2), and the connecting member (401) is slidably connected to the fixing seat (405).

4. A large-diameter composite steel pipe nested traction head according to claim 3, characterized in that: An adjusting bolt (403) for adjusting the distance between the support member (2) and the support base (1) is provided at the end of the fixing seat (405).

5. The large-diameter composite steel pipe nested traction head according to claim 4, characterized in that: An adjustment hole (4052) is formed at the end of the fixing seat (405), and the adjustment bolt (403) passes through the adjustment hole (4052) and is connected to the connecting member (401).

6. The large-diameter composite steel pipe nested traction head according to claim 3, characterized in that: Slide grooves (4011) are provided on both sides of the connecting member (401) and are arranged along the sliding direction of the connecting member (401) and are used to adjust the spacing and limit the position of the connecting member (401).

7. A large-diameter composite steel pipe nested traction head according to claim 6, characterized in that: The slide groove (4011) is provided with a fastening bolt (402) for fastening the connecting member (401) and the fixing seat (405), and a bolt hole (4051) for connecting the fastening bolt (402) is formed on the side of the fixing seat (405).

8. The large-diameter composite steel pipe nested traction head according to claim 3, characterized in that: The connecting member (401) is provided with a mounting seat (404) for fixing the universal rotating ball joint (3); the mounting seat (404) is arranged along the axial direction of the supporting base (1), and the universal rotating ball joint (3) moves synchronously with the supporting member (2).

9. The large-diameter composite steel pipe nested traction head according to claim 8, characterized in that: The mounting seat (404) is provided with a joint seat (301) for mounting a universal rotating ball joint (3), and the universal rotating ball joint (3) is slidably connected to the joint seat (301).

10. The large-diameter composite steel pipe nested traction head according to claim 1, characterized in that: When the support member (2) abuts against the inner wall of the steel pipe, the universal rotating ball joint (3) is located outside the steel pipe.

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