Electric internal mouthpiece

Abstract

The utility model relates to a kind of inner mouthpiece, specifically to a kind of electric inner mouthpiece.The mouthpiece includes middle disc, and pressure disc is respectively arranged in middle disc two sides, and winch motor is arranged on pressure disc, and winch motor is wound with pull rope through winch, and pull rope is connected with pressure disc through middle disc;Top rod connected with each other is evenly distributed between middle disc and pressure disc, and limiting guide rod is evenly distributed and penetrates on pressure disc.The inner mouthpiece is driven by the winding of pull rope, can effectively shorten the axial length of the mouthpiece, improve its bending capacity, so that it can more easily pass elbow;And because axial length is shortened, so that the mouthpiece is not easy to interfere with elbow inner wall, thereby enabling the mouthpiece to be used for the mouthpiece operation of elbow.Solved the weak bending capacity caused by the large axial length of the existing mouthpiece, and the problem that elbow is not easy to mouthpiece.

Description

Technical Field

[0001] This utility model relates to an internal alignment device, specifically an electric internal alignment device. Background Technology

[0002] Gas pipelines are typically connected by welding or flanges. During welding, the bevels need to be aligned. If external supports are used for bevel alignment, continuous welding is not possible due to the obstruction of the supports. It is necessary to weld one end, adjust the position, and re-support before continuing welding. This process of adjustment and re-supporting reduces welding efficiency and affects construction.

[0003] Patent application CN216730405U discloses a hydraulic pipe alignment device, which includes a traveling mechanism and an alignment mechanism. The traveling mechanism includes a traveling frame driven by a drive mechanism, and the traveling frame has an installation tube. The alignment mechanism includes a pair of pipe gripping structures spaced apart on the installation tube; an approach structure that moves one pipe towards the other through the pipe gripping structures; and an alignment structure located on the installation tube between the two pipe gripping structures. This utility model integrates the alignment mechanism onto the installation tube of the traveling frame, resulting in a compact structure. The entire alignment device can be moved simply by moving the installation tube. The pipe gripping structures can grip the pipes, and the approach structure can move one pipe towards the other through the pipe gripping structures, achieving automatic approach without external force, making operation simple and convenient. The alignment structure can align and correct the roundness of the pipe ends, ensuring the quality of the connection.

[0004] The aforementioned bevel alignment device can align bevels from the inside, thus minimizing interference with welding work on the outside and effectively improving construction efficiency. However, because it requires the use of a hydraulic cylinder, which must be axially telescopic, the axial length of the device is relatively large, making it difficult to pass through bends and align within bends. Therefore, it is necessary to design an electric internal bevel alignment device to solve these problems. Summary of the Invention

[0005] The purpose of this utility model is to provide an electric internal alignment device that can effectively enhance the ability to pass through bends and can align the bends in the bend.

[0006] The technical solution of this utility model is: An electric internal alignment device comprises a middle plate, a first pressure plate, a second pressure plate, a winch motor, a winch, a pull rope, and top rods. Its features include: a first pressure plate on one side of the middle plate and a second pressure plate on the other side; a winch motor on the outer surface of the second pressure plate; a winch on the output shaft of the winch motor; a pull rope wound on the winch; the end of the pull rope passing through the second pressure plate, the middle plate, and connecting to the first pressure plate; top rods arranged in a herringbone pattern and evenly distributed in a ring between the middle plate and the first and second pressure plates; pins connecting the top rods to each other, to the middle plate, and to the pressure plates (first or second pressure plate); and limit guide rods evenly distributed in a ring on the inner surface of the first pressure plate, the ends of which extend through the middle plate to the outer side of the second pressure plate.

[0007] A top plate for enhancing friction is connected to the pin between the top rods.

[0008] The top plate is a flat plate adapted to straight pipes.

[0009] The top plate is an arc shape adapted to the bend.

[0010] A limit block is provided at the end of the limiting guide rod on the outer side of the second pressure plate.

[0011] The beneficial effects of this utility model are as follows: This electric internal alignment tool uses a winch motor in conjunction with a winch and a pull rope to drive the pressure plate and the middle plate. While ensuring sufficient driving force, the axial length of the alignment tool is effectively shortened by the winding of the pull rope instead of the axial extension and retraction of the hydraulic cylinder, improving its bending ability and making it easier to pass through bends. Furthermore, the shortened axial length reduces interference with the inner wall of the bend, making it suitable for bend alignment operations. Replacing the hydraulic cylinder with a motor effectively reduces the number of hydraulic systems and other supporting equipment, lowers the weight of the equipment, facilitates handling, and effectively expands the applicable scenarios of the alignment tool, thus broadening its application range. It solves the problem of weak bending ability and difficulty in bend alignment caused by the large axial length of existing alignment tools. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a left-side view of the present invention.

[0013] In the diagram: 1. Middle plate, 2. First pressure plate, 3. Second pressure plate, 4. Winch motor, 5. Winch, 6. Pull rope, 7. Top rod, 8. Limiting guide rod, 9. Top plate, 10. Limiting block, 11. Elbow, 12. Straight pipe, 13. Bevel. Detailed Implementation

[0014] This electric internal alignment device consists of a middle plate 1, a first pressure plate 2, a second pressure plate 3, a winch motor 4, a winch 5, a pull rope 6, and top rods 7. The first pressure plate 2 is located on one side of the middle plate 1, and the second pressure plate 3 is located on the other side of the middle plate 1. The winch motor 4 is located on the outer side of the second pressure plate 3. Preferably, the winch motor 4 is a servo motor with a brake. The winch 5 is located on the output shaft of the winch motor 4, and the pull rope 6 is wound on the winch 5. The end of the pull rope 6 passes through the second pressure plate 3, the middle plate 1, and connects to the first pressure plate 2 in sequence. Top rods 7 are evenly distributed in a ring and interconnected in a herringbone pattern between the middle plate 1 and the first pressure plate 2 and the second pressure plate 3, respectively. The top rods 7 are connected to each other, to the middle plate 1, and to the pressure plate (first pressure plate or second pressure plate) by pins. Limiting guide rods 8 are evenly distributed in a ring on the inner side of the first pressure plate 2, and the end of the limiting guide rod 8 extends through the middle plate 1 to the outer side of the second pressure plate 3. The function of the winch motor 4 is to drive the winch 5 to rotate, thereby winding the pull rope 6 and shortening the pull rope 6, thus pulling the first pressure plate 2 closer to the middle plate 1. At the same time, the winch motor 4 compresses the second pressure plate 3 by retracting the pull rope 6, causing the second pressure plate 3 to move towards the middle plate 1 synchronously with the first pressure plate 2. During the movement of the first pressure plate 2 and the second pressure plate 3 towards the middle plate 1, the first pressure plate 2 and the middle plate 1, as well as the second pressure plate 3 and the middle plate 1, simultaneously compress the top rod 7, causing the end of the top rod 7 to move outward. The push of the top rod 7 moves the central axis of the pipes on both sides of the middle plate 1 towards the central axis of the middle plate 1, thereby aligning the pipe ends on both sides of the middle plate 1 and aligning the pipe bevels, which facilitates welding. Since the pressure plate is driven by the winding of the pull rope 6, the axial length of the beveling device is effectively reduced relative to the axial extension and retraction of the hydraulic cylinder. This effectively enhances the beveling device's bending ability, making it easier to pass through bends. Simultaneously, the reduced axial length makes the beveling device less likely to interfere with the inner wall of the bend, thus allowing it to be used for bend alignment operations and effectively expanding its application range. The function of the limiting guide rod 8 is to restrict the relative positions of the first pressure plate 2 and the second pressure plate 3 with the middle plate 1, ensuring that the first pressure plate 2 and the second pressure plate 3 can only move axially relative to the middle plate 1. This prevents misalignment between the first pressure plate 2 and the second pressure plate 3 and the middle plate 1, thereby ensuring that the pipe can be pushed towards the central axis of the middle plate 1, ensuring bevel alignment.

[0015] A top plate 9 is connected to the pin between the push rods 7 to enhance friction. The top plate 9 increases the friction between the push rod end and the inner wall of the pipe, thus using the friction of the top plate 9 to connect and fix the pipe to both sides of the center plate 1 during and after the welding process, preventing the pipe from detaching and maintaining the aligned state of the pipe during welding. The top plate 9 is a flat plate to accommodate straight pipes. The top plate 9 is also an arc-shaped plate to accommodate elbows.

[0016] A limiting block 10 is provided at the end of the limiting guide rod 8 on the outer side of the second pressure plate 3 to limit the position of the second pressure plate 3, prevent the second pressure plate 3 from separating from the limiting guide rod 8, and effectively prevent the second pressure plate 3 from being misaligned with the middle plate 1.

[0017] When using this electric internal pipe alignment device, the top plate 9 is replaced according to the type of pipe being aligned. If all pipes are straight, the top plates 9 on both sides of the central plate 1 are replaced with flat top plates 9. If the pipes are straight or have bends, the top plate 9 on one side of the central plate 1 is replaced with an arc-shaped top plate 9, and the top plate 9 on the other side of the central plate 1 is replaced with a flat top plate 9. After replacing the top plate 9, the alignment device is placed inside the bevel (after opening the pipe end, it is inserted or guided and pulled to the bevel using a wire). After observing the alignment device's position through the gap between the bevels, the winch motor 4 is started. The winch motor 4 sequentially pushes the first pressure plate 2 and the second pressure plate 3 towards the central plate 1 synchronously via the winch 5 and the pull rope 6. During the movement of the first and second pressure plates 2 and 3, they respectively press the top rods 7 on both sides of the central plate 1, causing the top rods 7 to move outwards, pushing the top plate 9 against the inner wall of the pipe, thus fixing the relative position of the alignment device with the pipes on both sides of the central plate 1. At the same time, the central axis of the pipes on both sides of the middle plate 1 is pushed to coincide with the central axis of the middle plate 1, thereby pushing the bevels of the pipes on both sides of the middle plate 1 to align.

[0018] This electric internal alignment tool uses a winch motor 4, winch 5, and pull rope 6 to drive the pressure plate and middle plate 1. While ensuring sufficient driving force, the winding of the pull rope 6 replaces the axial extension and retraction of the hydraulic cylinder, effectively shortening the axial length of the tool and improving its bending ability, making it easier to pass through bends. Furthermore, the shortened axial length reduces interference with the inner wall of the bend, allowing it to be used for bend alignment operations. Replacing the hydraulic cylinder with a motor effectively reduces the number of hydraulic systems and other supporting equipment, lowers equipment weight, facilitates handling, and effectively expands the applicable scenarios, thus broadening its application range. It solves the problem of existing alignment tools having weak bending ability and difficulty in bend alignment due to their large axial length.

Claims

1. An electric internal alignment device, comprising a middle plate (1), a first pressure plate (2), a second pressure plate (3), a winch motor (4), a winch (5), a pull rope (6), and a top rod (7), characterized in that: A first pressure plate (2) is provided on one side of the middle plate (1), and a second pressure plate (3) is provided on the other side of the middle plate (1). A winch motor (4) is provided on the outer side of the second pressure plate (3). A winch (5) is provided on the output shaft of the winch motor (4). A pull rope (6) is wound on the winch (5). The end of the pull rope (6) passes through the second pressure plate (3), the middle plate (1) and the first pressure plate (2) in sequence. The middle plate (1) is connected to the first pressure plate (2) and the second pressure plate (3) in a ring with top rods (7) that are connected to each other in a herringbone shape. The top rods (7) are connected to each other, the top rods (7) are connected to the middle plate (1) and the pressure plate by pins. Limiting guide rods (8) are evenly distributed in a ring on the inner side of the first pressure plate (2). The end of the limiting guide rod (8) passes through the middle plate (1) and extends to the outside of the second pressure plate (3).

2. The electric internal alignment device according to claim 1, characterized in that: A top plate (9) for enhancing friction is connected to the pin between the top rods (7).

3. The electric internal alignment device according to claim 2, characterized in that: The top plate (9) is a flat plate adapted to the straight pipe.

4. The electric internal alignment device according to claim 2, characterized in that: The top plate (9) is an arc shape adapted to the bend.

5. The electric internal alignment device according to claim 1, characterized in that: A limit block (10) is provided at the end of the limit guide rod (8) on the outer side of the second pressure plate (3).

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