Outer diameter ovality detection device for large-diameter longitudinal welded pipe

Abstract

The utility model relates to the technical field of ovality detection, and discloses an outer diameter ovality detection device for a large-caliber straight welded pipe, which comprises a clamping seat, a fixing plate is fixedly connected to the side surface of the clamping seat, and a threaded rod is inserted into the surface of the fixing plate in a threaded manner. Through arrangement of a clamping seat, when the outer diameter of the large-diameter straight welded pipe is measured, a threaded rod is rotated according to the thickness of the pipe wall of the large-diameter straight welded pipe, a moving plate is driven to move, the moving plate is more stable during moving through arrangement of a first sliding groove, and a top plate moves along with the moving plate when the moving plate moves, so that the outer diameter of the large-diameter straight welded pipe is measured. After the movable plate is moved to a designated position, the clamping base is clamped to the pipe wall of the large-diameter longitudinal welded pipe, the elastic force of the top plate is applied to the top plate and matched with the inner wall of the clamping base, the clamping base is fixed to the pipe opening of the large-diameter longitudinal welded pipe, and at the moment, the rotating arm can swing, so that the large-diameter longitudinal welded pipe is fixed. And the chuck is clamped on the edge of the other side of the large-diameter straight welded pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of ovality detection, in particular to an outer diameter ovality detection device for a large-diameter straight seam welded pipe. Background Art

[0002] At present, the large-diameter straight seam submerged arc welded pipes required for the production of oil and gas pipelines at home and abroad are used in the implementation standards. The ovality of the welded pipe is a very important quality standard. Therefore, each manufacturer needs to adopt corresponding means of detecting ovality during the product manufacturing and inspection process to ensure the requirements and related accuracy.

[0003] In the prior art, the inventors found that there are at least the following problems in the prior art:

[0004] (1) The existing ovality detection device is too large, and the large-diameter straight seam welded pipe is heavy. When testing the outer diameter ovality of the pipe, the ovality detection device needs to be moved to the large-diameter straight seam welded pipe for testing, which is very inconvenient.

[0005] (2) When the existing ovality detection device is used, the large-diameter straight-seam welded pipe needs to be placed on the ovality detection device for measurement, so that multiple people are required to cooperate when carrying the large-diameter straight-seam welded pipe, which is not convenient to use. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides an outer diameter ovality detection device for large-diameter straight seam welded pipes, which has the advantages of being convenient to carry and easy to operate when detecting large-diameter straight seam submerged arc welded pipes, thereby solving the problems raised in the background technology.

[0007] The utility model provides the following technical solution: a device for detecting the ovality of the outer diameter of a large-diameter straight seam welded pipe, comprising a holder, a fixed plate fixedly connected to the side surface of the holder, a threaded rod threadedly inserted into the surface of the fixed plate, a movable plate rotatably connected to one end of the threaded rod, a plug rod slidably inserted into the side surface of the movable plate, a top plate fixedly connected to one end of the plug rod, a rotating arm rotatably connected to the surface of one side of the holder, a detecting ruler rotatably connected to the other end of the rotating arm, a sliding block slidably inserted into the surface of the detecting ruler, and a chuck fixedly connected to the surface of one side of the sliding block.

[0008] Preferably, a slide groove one is provided on the inner wall of the holder, and a side surface of the movable plate is slidably engaged with the slide groove one.

[0009] Preferably, a spring 1 is movably sleeved on the surface of the insertion rod, one end of the spring 1 abuts against a side surface of the movable plate, and the other end of the spring 1 abuts against the side surface of the top plate.

[0010] Preferably, the surface of the detection ruler is provided with scale marks.

[0011] Preferably, a slot is provided at one end of the rotating arm, a second slide groove is provided on the inner wall of the slot, a sliding rod is slidably inserted inside the slot, a fixing ring is fixedly connected to the surface of the sliding rod, a second spring is movably sleeved on the surface of the sliding rod, the second spring and the fixing ring are both located inside the second slide groove, a limiting hole is provided at one end of the detecting ruler, and the model specifications of the sliding rod and the limiting hole are consistent.

[0012] Preferably, a buckle is fixedly connected to the surface of the fixing ring, and a slot is provided on the surface of the detection ruler, and the size and specification of the slot match the buckle.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. By providing a clamping seat, when measuring the outer diameter of the large-diameter straight-seam welded pipe, according to the pipe wall thickness of the large-diameter straight-seam welded pipe, the threaded rod is rotated to drive the moving plate to move. The setting of the slide groove makes the moving plate more stable when moving, and the top plate will move along with it when the moving plate moves. After the moving plate is moved to the specified position, the clamping seat is clamped on the pipe wall of the large-diameter straight-seam welded pipe, and the elastic force of the top plate is applied to the top plate and cooperates with the inner wall of the clamping seat to fix the position of the clamping seat at the pipe mouth of the large-diameter straight-seam welded pipe. At this time, the rotating arm can be swung, and the chuck can be clamped on the other side edge of the large-diameter straight-seam welded pipe. The outer diameter of the large-diameter straight-seam welded pipe can be directly obtained by referring to the scale mark on the detection ruler. The operation is simple and quick, and the problem of needing to transport the large-diameter straight-seam welded pipe to the device for detection in the existing device is avoided.

[0015] 2. By providing a slide bar, before the detection, the buckle is toggled to drive the slide bar to slide inside the slot. When the rotating arm and the detection ruler are 180 degrees, after the buckle is released, the elastic force of the second spring pushes the fixing ring to move, so that one end of the slide bar is inserted into the inside of the limit hole, thereby fixing the position of the unfolded detection ruler, which is convenient for subsequent use. After the detection is completed, the detection ruler is rotated and folded, so that the detection ruler and the rotating arm are folded, and the buckle is clamped in the inside of the card slot, thereby completing the fixing of the folded rotating arm and the detection ruler, completing the folding of the device, and facilitating the carrying of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model device;

[0017] Figure 2 This is a schematic diagram of the structure of the card holder of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the detection ruler of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the rotating arm of the utility model.

[0020] In the figure: 1. Base; 2. Rotating arm; 3. Detection ruler; 4. Fixed plate; 5. Threaded rod; 6. Moving plate; 7. Insert rod; 8. Top plate; 9. Spring 1; 10. Slide 1; 11. Slide 2; 12. Slot; 13. Slide rod; 14. Fixed ring; 15. Buckle; 16. Spring 2; 17. Slot; 18. Limit hole; 19. Slider; 20. Chuck; 21. Scale mark. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figure 1-4 A device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe comprises a holder 1, a fixed plate 4 is fixedly connected to the side of the holder 1, a threaded rod 5 is threadedly inserted into the surface of the fixed plate 4, a movable plate 6 is rotatably connected to one end of the threaded rod 5, a plugging rod 7 is slidably inserted into the side of the movable plate 6, a top plate 8 is fixedly connected to one end of the plugging rod 7, a rotating arm 2 is rotatably connected to the surface of one side of the holder 1, a detecting ruler 3 is rotatably connected to the other end of the rotating arm 2, a slider 19 is slidably inserted into the surface of the detecting ruler 3, and a chuck 20 is fixedly connected to the surface of one side of the slider 19.

[0023] Among them, the inner wall of the holder 1 is provided with a slide groove 10, one side surface of the movable plate 6 is slidably engaged with the slide groove 10, and the surface of the insertion rod 7 is movably sleeved with a spring 9, one end of the spring 9 is in contact with one side surface of the movable plate 6, and the other end of the spring 9 is in contact with the side surface of the top plate 8. According to the wall thickness of the large-diameter straight-seam welded pipe, the threaded rod 5 is rotated to drive the movable plate 6 to move. The setting of the slide groove 10 makes the movable plate 6 more stable when moving, and the top plate 8 will move with it when the movable plate 6 moves. After moving the movable plate 6 to the specified position, the holder 1 is engaged with the pipe wall of the large-diameter straight-seam welded pipe, and the position of the holder 1 is fixed at the pipe mouth of the large-diameter straight-seam welded pipe. At this time, the rotating arm 2 can be swung, and the chuck 20 is engaged with the other side edge of the large-diameter straight-seam welded pipe.

[0024] The surface of the detection ruler 3 is provided with a scale mark 21 , and the outer diameter of the large-diameter straight seam welded pipe can be directly obtained by referring to the scale mark 21 on the detection ruler 3 .

[0025] Among them, a slot 12 is provided at one end of the rotating arm 2, and a slide groove 11 is provided on the inner wall of the slot 12. A slide rod 13 is slidably inserted inside the slot 12, and a fixing ring 14 is fixedly connected to the surface of the slide rod 13. A spring 16 is movably sleeved on the surface of the slide rod 13. The spring 16 and the fixing ring 14 are both located inside the slide groove 11. A limiting hole 18 is provided at one end of the detection ruler 3. The model specifications of the slide rod 13 and the limiting hole 18 are consistent. The buckle 15 is moved to drive the slide rod 13 to slide inside the slot 12. When the rotating arm 2 and the detection ruler 3 are 180 degrees, after the buckle 15 is released, the elastic force of the spring 16 pushes the fixing ring 14 to move, so that one end of the slide rod 13 is inserted into the inside of the limiting hole 18, thereby fixing the position of the unfolded detection ruler 3.

[0026] Among them, a buckle 15 is fixedly connected to the surface of the fixing ring 14, and a slot 17 is opened on the surface of the detection ruler 3. The slot 17 matches the model and specification of the buckle 15. The detection ruler 3 is rotated and folded, so that the detection ruler 3 and the rotating arm 2 are folded, and the buckle 15 is snapped into the inside of the slot 17, thereby completing the fixing of the position of the folded rotating arm 2 and the detection ruler 3, and completing the folding of the device.

[0027] Working principle: when measuring the outer diameter of a large-diameter straight-seam welded pipe, according to the wall thickness of the large-diameter straight-seam welded pipe, the threaded rod 5 is rotated to drive the movable plate 6 to move. The setting of the slide groove 10 makes the movable plate 6 more stable when moving. When the movable plate 6 moves, the top plate 8 will move accordingly. After the movable plate 6 is moved to the specified position, the holder 1 is clamped on the wall of the large-diameter straight-seam welded pipe, and the elastic force of the top plate 8 is applied to the top plate 8, and cooperates with the inner wall of the holder 1 to fix the position of the holder 1 at the pipe mouth of the large-diameter straight-seam welded pipe. At this time, the rotating arm 2 can be swung, and the chuck 20 is clamped on the other side edge of the large-diameter straight-seam welded pipe, referring to the detection ruler 3. The scale mark 21 on the upper surface can directly indicate the outer diameter of the large-diameter straight seam welded pipe. Before testing, the buckle 15 is toggled to drive the slide bar 13 to slide inside the slot 12. When the rotating arm 2 and the detection ruler 3 are 180 degrees apart, after the buckle 15 is released, the elastic force of the spring 16 pushes the fixing ring 14 to move, so that one end of the slide bar 13 is inserted into the inside of the limit hole 18, thereby fixing the position of the unfolded detection ruler 3 for convenience of subsequent use. After the test is completed, the detection ruler 3 is rotated and folded, so that the detection ruler 3 and the rotating arm 2 are folded, and the buckle 15 is clamped in the inside of the card slot 17, thereby completing the fixing of the folded rotating arm 2 and the detection ruler 3.

[0028] In the description, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe, characterized in that: The invention comprises a card seat (1), a fixed plate (4) is fixedly connected to the side of the card seat (1), a threaded rod (5) is threadedly inserted on the surface of the fixed plate (4), one end of the threaded rod (5) is rotatably connected to a movable plate (6), a plug rod (7) is slidably inserted on the side of the movable plate (6), one end of the plug rod (7) is fixedly connected to a top plate (8), one side surface of the card seat (1) is rotatably connected to a rotating arm (2), the other end of the rotating arm (2) is rotatably connected to a detection ruler (3), a sliding block (19) is slidably inserted on the surface of the detection ruler (3), and a clamp (20) is fixedly connected to the surface of one side of the sliding block (19).

2. The device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe according to claim 1, characterized in that: The inner wall of the card seat (1) is provided with a slide groove (10), and a side surface of the movable plate (6) is slidably engaged with the slide groove (10).

3. The device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe according to claim 1, characterized in that: A spring (9) is movably sleeved on the surface of the insertion rod (7), one end of the spring (9) abuts against a side surface of the movable plate (6), and the other end of the spring (9) abuts against a side surface of the top plate (8).

4. The device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe according to claim 1, characterized in that: The surface of the detection ruler (3) is provided with a scale mark (21).

5. The device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe according to claim 1, characterized in that: A slot (12) is provided at one end of the rotating arm (2), a second slide groove (11) is provided on the inner wall of the slot (12), a slide rod (13) is slidably inserted inside the slot (12), a fixed ring (14) is fixedly connected to the surface of the slide rod (13), a second spring (16) is movably sleeved on the surface of the slide rod (13), the second spring (16) and the fixed ring (14) are both located inside the second slide groove (11), a limiting hole (18) is provided at one end of the detection ruler (3), and the model specifications of the slide rod (13) and the limiting hole (18) are consistent.

6. The device for detecting the outer diameter ovality of a large-diameter straight seam welded pipe according to claim 5, characterized in that: A buckle (15) is fixedly connected to the surface of the fixing ring (14), and a clamping groove (17) is provided on the surface of the detection ruler (3), and the model and specification of the clamping groove (17) are consistent with that of the buckle (15).

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