Pipe expanding device for straight seam steel pipe machining

Abstract

The utility model discloses a pipe expanding device for processing a straight seam steel pipe, which comprises a fixed table, a steel pipe groove is arranged in the fixed table, a working table is arranged at one end of the fixed table, a hydraulic machine is arranged on the working table, a pipe expanding head is arranged at one end of a hydraulic rod of the hydraulic machine, and a connecting table is arranged at the other end of the fixed table. A pressing piece is arranged on the side, close to the fixing table, of the connecting table, and a motor is arranged on one side of the connecting table. The device has the advantages that straight seam steel pipes and other types of steel pipes can rapidly fall into the fixing table to be positioned and placed while being conveyed in a semi-automatic mode, then the hydraulic cylinder drives the pipe expanding head to clamp the steel pipes, and rotating heating can be conducted while the steel pipes are clamped through the pressing piece in the clamping process; and then the hydraulic cylinder is further pushed to be formed at a time to enter the inner wall of the steel pipe for pipe expanding, the efficiency is high, and pipe expanding is stable.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing, specifically to a pipe expansion device for processing straight seam steel pipes. Background Technology

[0002] Straight seam steel pipe is a type of steel pipe made by rolling steel strip or plate into a tubular shape and then welding both ends together in a straight line. Its production process typically employs high-frequency current welding or other straight seam welding methods. Depending on the welding method and materials used, straight seam steel pipes can be classified into different types.

[0003] Similar to traditional steel pipes, in some cases, straight seam pipes may deform or compress due to external forces or pressure, or they may need to be connected to other pipes and fittings (such as flanges and joints) during pipeline construction. It is necessary to ensure good sealing at the connection to avoid leakage. In this case, it is necessary to expand the diameter of both ends of the steel pipe to increase the inner diameter of the pipe, adjust the shape of the pipe, improve the flow capacity of the pipe, or make the pipe meet the design requirements. However, traditional pipe expanders use a hydraulic press to drive the expander head to directly insert into one end of the steel pipe for expansion. This method is less effective and causes more wear on the expander head. Furthermore, the impact force generated during the rapid impact may conflict with the welding stress of the straight seam steel pipe itself, causing cracks in the steel pipe and leading to pipe breakage. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The technical problem this utility model aims to solve is that traditional pipe expanders use a hydraulic press to drive the expanding head directly into one end of the steel pipe during expansion, which has poor effect and causes high wear on the expanding head. Furthermore, the impact force generated during rapid impact may conflict with the welding stress of the straight seam steel pipe itself, causing cracks in the steel pipe and leading to pipe rupture.

[0006] (II) Technical Solution

[0007] To solve the above problems, this utility model provides the following technical solution:

[0008] A pipe expanding device for processing straight seam steel pipes includes a fixed platform with a steel pipe groove in it. A worktable is located at one end of the fixed platform, and a hydraulic press is mounted on the worktable. One end of the hydraulic rod of the hydraulic press has an expanding head. A connecting platform is located at the other end of the fixed platform. A clamping component is located on the side of the connecting platform near the fixed platform. A motor is located on one side of the connecting platform, and the motor shaft passes through the connecting platform and connects to the clamping component. A conveying roller assembly is located on one side of the fixed platform, and a discharge port is located on the other side of the fixed platform. A flame gun is located on the worktable near the fixed platform. A vibration motor is located below the fixed platform, and a connecting frame is provided between the vibration motor and the fixed platform.

[0009] Furthermore, the steel pipe groove is semi-circular, and a support leg is provided below the fixed platform.

[0010] Furthermore, the expanding head is fixedly connected to the hydraulic rod of the hydraulic press, the expanding head is provided with a baffle, and a limiting block is provided between the hydraulic rod of the hydraulic press and the baffle.

[0011] Furthermore, the conveyor roller assembly is inclined.

[0012] Furthermore, a motor mounting plate is provided below the motor, and the motor mounting plate is fixedly connected to the connecting platform.

[0013] Furthermore, the flame gun is either a natural gas flame gun or a liquefied gas flame gun, and the flame gun is fixed on the workbench with the flame gun nozzle facing upwards at one end of the fixed platform.

[0014] (III) Beneficial Effects

[0015] The beneficial effects of this utility model are:

[0016] The semi-automatic transport system for straight seam steel pipes and other types of steel pipes allows for rapid placement into a fixed platform. A hydraulic cylinder then drives an expanding head to clamp the pipe. During clamping, the pipe is simultaneously heated by a clamping device, ensuring the pipe's ends are heated. The hydraulic cylinder then propels the pipe forward in a single pass, expanding it into the inner wall of the pipe. This process is highly efficient and stable, minimizing wear on the expanding head and reducing aging losses. Furthermore, it reduces stress on the straight seam steel pipe during expansion, lowering the risk of cracks and breakage. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a schematic diagram of the fixed platform structure;

[0020] The markings in the diagram are: 1-fixed platform, 2-workbench, 3-hydraulic press, 4-pipe expander head, 5-connecting platform, 6-clamping component, 7-motor, 8-transfer roller assembly, 9-discharge port, 10-flame gun, 11-vibration motor, 12-baffle, 1a-steel pipe trough, 11a-connecting frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Please see Figure 1-3 The device shown is a pipe expanding device for processing straight seam steel pipes, including a fixed platform 1, a steel pipe groove 1a in the fixed platform 1, a worktable 2 at one end of the fixed platform 1, a hydraulic press 3 on the worktable 2, a pipe expanding head 4 at one end of the hydraulic rod of the hydraulic press 3, a connecting platform 5 at the other end of the fixed platform 1, a clamping component 6 on the side of the connecting platform 5 near the fixed platform 1, a motor 7 on one side of the connecting platform 5, the shaft of the motor 7 passing through the connecting platform 5 and connected to the clamping component 6, a conveying roller assembly 8 on one side of the fixed platform 1, a discharge port 9 on the other side of the fixed platform 1, a flame gun 10 at the end of the worktable 2 near the fixed platform 1, a vibration motor 11 below the fixed platform 1, and a connecting frame 11a between the vibration motor 11 and the fixed platform.

[0024] The steel pipe trough 1a is semi-circular, and the support leg is provided below the fixed platform 1. The steel pipe trough 1a is used to place the steel pipe to be expanded and stamped. When the steel pipe is placed, it is put in from one end of the conveyor roller assembly 8, and the steel pipe will roll into the steel pipe trough 1a along the conveyor roller assembly 8 for positioning. This device is only used for round steel pipes. Square pipes are not suitable for rolling on the conveyor roller assembly 8.

[0025] The expander head 4 is fixedly connected to the hydraulic rod of the hydraulic press 3. The expander head 4 is equipped with a baffle 12. A limiting block is provided between the hydraulic rod of the hydraulic press 3 and the baffle 12. The expander head 4 is a conventional expander component. The hydraulic press 3 provides the stamping power, and the baffle 12 and the limiting block provide expansion stability. When expanding the pipe, the hydraulic press 3 drives the expander head 4 forward. The conical end of the expander head 4 enters the inner wall of the steel pipe first, and the expansion is completed after all the subsequent expander heads 4 have entered. It should be noted that this device is not formed in one step. Instead, the hydraulic press 3 drives the expander head 4 to advance a part of the stroke to contact the steel pipe and push it forward, so that it contacts the clamping part 6 and clamps it. At this time, the motor 7 drives the steel pipe to rotate, and the flame gun 10 heats the end of the steel pipe at this time. Then the hydraulic press 3 pushes again to reach the expansion stroke to complete the expansion, and then resets.

[0026] The conveyor roller assembly 8 is inclined to facilitate the rolling of the steel pipe.

[0027] A motor mounting plate is provided below the motor 7, and the motor mounting plate is fixedly connected to the connecting platform 5.

[0028] The flame gun 10 is a type of natural gas flame gun or liquefied gas flame gun. The flame gun 10 is fixed on the workbench 1, with the nozzle of the flame gun 10 facing upwards at one end of the fixed platform 1. Traditional large steel pipe expansion uses induction heating, which is costly. Therefore, this device uses flame heating, which is less efficient but much cheaper. At the same time, attention should be paid to the usage specifications, and protective measures should be taken in the use of natural gas and liquefied gas.

[0029] The specific working principle is as follows: the steel pipe is placed from the conveyor roller assembly 8 and allowed to fall freely into the steel pipe groove 1a. Then, the hydraulic cylinder 3 is activated to push one end of the steel pipe and form a clamping clamp with the clamping component 6. Then, the rotation of the motor 7 drives the steel pipe, and the flame gun 10 is activated to heat the expanded end of the steel pipe. After reaching a certain temperature, the hydraulic cylinder 3 quickly drives the expanding head 4 to push in to complete the expansion and then reset. After that, the steel pipe is taken out and placed on the discharge port 9 for cooling before proceeding to the next process. Especially for straight seam steel pipes, heating during the expansion process can soften the end of the steel pipe, reducing welding stress and the risk of cracks caused by direct and rapid stamping.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipe expanding device for processing straight seam steel pipes, characterized in that: The utility model provides a steel pipe expanding device, including fixed platform (1), be equipped with steel pipe groove (1a) in fixed platform (1), one end of fixed platform (1) is equipped with workbench (2), be equipped with hydraulic press (3) on workbench (2), one end of hydraulic press (3) hydraulic rod is equipped with pipe expanding head (4), the other end of fixed platform (1) is equipped with connecting platform (5), connecting platform (5) is equipped with pressure piece (6) near one side of fixed platform (1), one side of connecting platform (5) is equipped with motor (7), the rotating shaft of motor (7) penetrates connecting platform (5) and is connected with pressure piece (6), one side of fixed platform (1) is equipped with conveying roller assembly (8), the other side of fixed platform (1) is equipped with discharge gate (9), one end of workbench (2) near fixed platform (1) is equipped with flame gun (10), the below of fixed platform (1) is equipped with vibration motor (11), and the vibration motor (11) is equipped with connecting frame (11a) between fixed platform.

2. A pipe expanding device for straight-seam pipe processing according to claim 1, characterized in that: The steel pipe groove (1a) is semicircular, and the fixed platform (1) is provided with a supporting leg below.

3. A pipe expanding device for straight-seam pipe processing according to claim 1, characterized in that: The pipe expanding head (4) is fixedly connected with the hydraulic rod of the hydraulic press (3), the pipe expanding head (4) is provided with a baffle (12), and a limiting block is arranged between the hydraulic rod of the hydraulic press (3) and the baffle (12).

4. The pipe expanding device for straight-seam pipe processing according to claim 1, characterized by: The conveying roller assembly (8) is inclined.

5. The pipe expanding device for straight-seam pipe processing according to claim 1, characterized in that: A motor fixing plate is arranged below the motor (7), and the motor fixing plate is fixedly connected with the connecting platform (5).

6. The pipe expanding device for straight-seam pipe processing according to claim 1, characterized by: The flame gun (10) is one of a natural gas flame gun or a liquefied gas flame gun, the flame gun (10) is fixed on the workbench (2), and a nozzle of the flame gun (10) faces the upper side of one end of the fixed platform (1).

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