Large rectangular pipe bending device

Abstract

A large rectangular pipe bending device relates to the technical field of steel pipe bending and comprises a supporting column, a rotary support, a supporting trolley, a pressing plate, a medium-frequency heater, a progressive machine, a bottom frame and a carrier roller. The progressive machine drives the rectangular pipe to move according to the set speed, the medium-frequency heater is arranged on the right side of the progressive machine and heats the rectangular pipe, the rotating support limits the moving track of the right end of the rectangular pipe, and the rectangular pipe is bent into an arc shape under the pushing effect of the progressive machine. According to the utility model, the technical problem of bending the rectangular pipe with large length and large radian radius is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe bending, in particular to a large rectangular pipe bending device. Background Art

[0002] A rectangular pipe is a steel pipe with a rectangular cross-sectional shape and can be used as a pipe for conveying fluids, such as for conveying fluids like petroleum, natural gas, water, coal gas, steam, etc. In practical applications, in order to buffer the fluid, the rectangular pipe needs to be made into an arc-shaped elbow. Especially in the fields of petroleum and natural gas, the length of the arc-shaped elbow is very large, and the radius of the arc reaches more than 10 meters. Such a huge elbow is difficult to manufacture on ordinary pipe bending equipment. Therefore, there is an urgent need in the industry for a large rectangular pipe bending device. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a large rectangular pipe bending device to solve the problem of bending large rectangular pipes.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A large rectangular pipe bending device includes a support column, a rotary support, a support trolley, a pressing plate, an intermediate frequency heater, a progressive machine, a chassis, and a roller. The support column, the progressive machine, and the chassis are all fixedly installed on the horizontal ground of the workshop. The chassis is arranged on the left side of the progressive machine, and rollers are arranged on the chassis. The rectangular pipe is placed on the rollers and conveyed into the progressive machine. An intermediate frequency heater is arranged on the right side of the progressive machine. The left end of the rotary support is rotatably and fixedly installed on the support column, and the right end of the rotary support is fixedly placed on the support trolley. The right end of the rectangular pipe is fixedly connected with the right end of the rotary support through the pressing plate. Universal casters are installed on the support trolley.

[0006] In the above-mentioned large rectangular pipe bending device, the highest point of the roller is located in the same horizontal plane as the highest point of the right end of the rotary support.

[0007] In the above-mentioned large rectangular pipe bending device, the rotary support includes a support rod, a fastening bolt, and a support sleeve. The support rod is inserted into the inner cavity of the support sleeve, and the two slide relative to each other. The fastening bolt is screwed into the threaded hole on the support sleeve.

[0008] The utility model has the following advantages:

[0009] In the large rectangular pipe bending device of the utility model, the progressive machine drives the rectangular pipe to move at a set speed. An intermediate frequency heater is arranged on the right side of the progressive machine, and the intermediate frequency heater heats the rectangular pipe. The rotary support defines the running track of the right end of the rectangular pipe. Under the pushing action of the progressive machine, the rectangular pipe is bent into an arc shape. The utility model solves the technical problem of bending rectangular pipes with large lengths and large arc radii. Description of the Drawings

[0010] Figure 1 This is a schematic top view of the utility model;

[0011] Figure 2 This is a schematic front view of the utility model;

[0012] Each label in the figure respectively represents: 1, rectangular pipe; 2, support column; 3, rotary support; 4, support trolley; 5, pressing plate; 6, intermediate frequency heater; 7, progressive feeder; 8, chassis; 9, idler roller; 10, universal caster; 3-1, support rod; 3-2, fastening bolt; 3-3, support sleeve. Detailed Implementation Manner

[0013] The following further describes the utility model in conjunction with the drawings and embodiments.

[0014] The large rectangular pipe bending device of the utility model, as Figure 1 shown, fixedly installs the support column 2, the progressive feeder 7 and the chassis 8 on the horizontal ground of the workshop. The left end of the rotary support 3 is installed on the support column 2, and the rotary support 3 rotates around the support column 2. The chassis 8 is arranged on the left side of the progressive feeder 7, and an idler roller 9 is installed on the chassis 8. The idler roller 9 supports the rectangular pipe 1. A rectangular pipe driving mechanism is provided in the progressive feeder 7, which can move the rectangular pipe 1 uniformly at a certain speed. An intermediate frequency heater 6 is arranged on the right side of the progressive feeder 7 for locally heating the rectangular pipe 1. At the right end of the rectangular pipe 1, the pressing plate 5 is used to fasten the end of the rectangular pipe 1 to the right end of the rotary support 3 through bolts. The right end of the rotary support 3 is fixedly arranged on the support trolley 4.

[0015] For the large rectangular pipe bending device of the utility model, the highest point of the idler roller 9 and the highest point of the right end of the rotary support 3 are in the same horizontal plane to ensure that the rectangular pipe 1 will not warp after bending.

[0016] For the large rectangular pipe bending device of the utility model, the rotary support 3 includes a support rod 3-1 and a support sleeve 3-3. The support rod 3-1 is inserted into the inner cavity of the support sleeve 3-3, and the two slide relative to each other. A threaded hole is provided on the support sleeve 3-3, and the fastening bolt 3-2 is screwed into the threaded hole. The fastening bolt 3-2 is used to fasten the support rod 3-1 and the support sleeve 3-3 together. The design of the telescopic structure is to adjust the length of the rotary support 3 to facilitate the processing of rectangular pipes with different curvature radii.

[0017] For the large rectangular pipe bending device of the present utility model, during operation, first, the rectangular pipe 1 is placed on the idler roller 9, and the progressive machine 7 drives the rectangular pipe 1 to move from right to left. During the movement, the intermediate frequency heater 6 locally heats the rectangular pipe 1. Since the end of the rectangular pipe 1 is fixed to the right end of the rotary support 3, the end of the rectangular pipe 1 is restricted by the rotary support 3, and the running track of the end of the rectangular pipe 1 is the same as the running track of the right end of the rotary support 3. The length of the rotary support 3 is the arc radius of the rectangular pipe 1 we need. During the production process, a certain number of support trolleys can be used under the rectangular pipe 1 to support the rectangular pipe 1 and prevent its deformation after excessive length.

Claims

1. A large rectangular pipe bending device, characterized in that: It includes a support column (2), a rotary support (3), a support trolley (4), a pressing plate (5), an intermediate frequency heater (6), a progressive conveyor (7), a chassis (8), and a supporting roller (9). The support column (2), the progressive conveyor (7), and the chassis (8) are all fixedly installed on the workshop horizontal ground. The chassis (8) is arranged on the left side of the progressive conveyor (7), and the supporting roller (9) is arranged on the chassis (8). The rectangular pipe (1) is placed on the supporting roller (9) and conveyed into the progressive conveyor (7). The intermediate frequency heater (6) is arranged on the right side of the progressive conveyor (7). The left end of the rotary support (3) is rotatably and fixedly installed on the support column (2), and the right end of the rotary support (3) is fixedly placed on the support trolley (4). The right end of the rectangular pipe (1) is fixedly connected to the right end of the rotary support (3) through the pressing plate (5). A universal caster (10) is installed on the support trolley (4).

2. The large rectangular pipe bending device according to claim 1, characterized in that: The highest point of the supporting roller (9) and the highest point of the right end of the rotary support (3) are located in the same horizontal plane.

3. A large rectangular pipe bending device according to claim 1, characterized in that: The rotary support (3) includes a support rod (3-1), a fastening bolt (3-2), and a support sleeve (3-3). The support rod (3-1) is inserted into the inner cavity of the support sleeve (3-3), and the two slide relative to each other. The fastening bolt (3-2) is screwed into the threaded hole on the support sleeve (3-3).

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