Device for testing the quality of a welded seam of a steel pipe

Abstract

The steel pipe weld quality detection device provided by the application not only solves the problem that it is not easy to detect whether there is a weld and a weak area in steel pipe welding, but also focuses on solving the welding part of the T-shaped structure connection, and is convenient to place and take out, has the functions of automatic positioning and detection after being placed, and the technical solution is that the device is characterized in that it comprises a gas pressure conveying pipe, the gas pressure conveying pipe is connected to the inside of a detection component through a one-way conduction structure, the detection component comprises a posture adjusting structure, the end of the posture adjusting structure is provided with an inflation plugging structure, the posture adjusting structure comprises a hollow support rod, a bidirectional drive motor is arranged in the middle of the hollow support rod, the two ends of the hollow support rod are fixedly connected with the inflation plugging structure driven by the bidirectional drive motor, and gas pressure conveying is performed after plugging is completed, and detection is performed through gas pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of steel pipe quality detection device, especially steel pipe weld quality detection device. BACKGROUND

[0002] The mode of steel pipe welding is divided into many kinds, among which the common ones are lengthening treatment of steel pipes with same diameter and T-shaped connection of staggered steel pipes, wherein the T-shaped connection of steel pipes is prone to problems such as existence of weld and weak area due to welding angle, especially the T-shaped connection with certain inclination angle. However, in the detection process, destructive detection cannot be carried out, and the welding quality cannot be effectively detected, and it is difficult to determine the welding quality by naked eye, and it is also difficult to detect whether the position of high-temperature melting is too thin, whether there is a small perforation and a gas leakage position. Therefore, a device capable of detecting the welding quality of steel pipe without damaging the welded position of steel pipe is needed to determine whether the welded position of steel pipe is qualified. SUMMARY

[0003] In view of the above problems, the present application provides a steel pipe weld quality detection device, which can solve the problems of difficulty in detecting whether there is a weld and a weak area in the welded steel pipe, and can effectively detect the welded position of the T-shaped structure, especially the T-shaped structure with certain inclination angle.

[0004] The technical solution is characterized in that it comprises a gas pressure delivery pipe connected to the inside of a detection component through a one-way conduction structure, the detection component comprises a posture adjusting structure, the end of the posture adjusting structure is provided with an inflation sealing structure, the posture adjusting structure comprises a hollow support rod, a bidirectional drive motor is arranged in the middle of the hollow support rod, the two ends of the hollow support rod are fixedly connected with the inflation sealing structure driven by the bidirectional drive motor, a support frame is rotatably connected to the outer shell of the bidirectional drive motor, the support frame is an arc-shaped frame, and the end of the support frame is fixedly connected with the inflation sealing structure, the inflation sealing structure at the end of the support frame is connected to the gas pressure delivery pipe through a one-way conduction structure, and a pressure sensor is fixedly connected to the bidirectional drive motor.

[0005] Preferably, the inflation sealing structure comprises a sealing cap fixedly connected to the hollow support rod, an annular rubber ring is arranged on the sealing cap, a plurality of arc-shaped support members are fixedly connected in the annular rubber ring, a moving block is longitudinally and slidably connected in the hollow support rod, the moving block and the corresponding arc-shaped support member are connected through a rotating connecting rod, the two ends of the rotating connecting rod are rotatably connected with the inside of the moving block and the arc-shaped support member, and the moving block is threadedly connected with the rotating shaft of the bidirectional drive motor.

[0006] As preferred, the reel is fixedly connected to the support frame, the support frame is provided with a vertical through hole corresponding to the position of the reel, a rope is arranged in the vertical through hole, one end of the rope is fixedly connected to the bidirectional driving motor, and the other end extends into the reel.

[0007] As preferred, the middle part of the support frame is an electric telescopic rod, the lower end of the support frame is rotationally connected to the bidirectional driving motor, and the rotationally connected part of the support frame and the bidirectional driving motor is provided with a reset torsional spring.

[0008] The present application has the following advantages: 1. The problem that it is not easy to detect whether there is a weld and a weak area in the steel pipe welding is solved;

[0009] 2. The welding part of the T-shaped structure connection, especially the detection of the T-shaped structure connection with a certain inclination angle, is solved;

[0010] 3. The detection is performed from the inside, and it is convenient to place and take out;

[0011] 4. After being placed, it has the functions of automatic positioning and detection. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an internal structure schematic view of the present application.

[0013] Figure 2 It is an internal structure sectional view of the present application.

[0014] Figure 3 It is a use state schematic view of the present application.

[0015] Figure 4 It is a detection component structure schematic view of the present application.

[0016] Figure 5 It is a detection component sectional view of the present application.

[0017] Figure 6 It is a detection component not expanded schematic view of the present application.

[0018] Figure 7 It is a sealing cap schematic view in the detection component not expanded schematic view of the present application.

[0019] Figure 8 It is a detection component not expanded sectional view of the present application.

[0020] Figure 9 It is a one-way conduction structure in the detection component not expanded sectional view of the present application.

[0021] DRAWINGS

[0022] 1, air pressure conveying pipe; 2, hollow support rod; 3, bidirectional drive motor; 4, support frame; 5, pressure sensor; 6, sealing cap; 7, annular rubber ring; 8, arc-shaped support; 9, moving block; 10, rotary connecting rod; 11, winding device; 12, rope; 13, electric telescopic rod; 14, reset torsional spring; 15, connecting bayonet; 16, conductive shell; 17, pressure spring; 18, sealing ball; 19, pressing rod; 20, oval-shaped support body; 21, connecting sheet. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application are further described in detail. Figures 1-9 The specific embodiments of the present application are further described in detail.

[0024] In use, in the initial state, the posture adjusting structure is in the storage state, that is, the support frame 4 is in the folded state, the winding device 11 is in the non-working state, the reset torsional spring 14 is in the initial state, and the inflation sealing structure is in the non-inflated state. In use, the whole structure is extended downward into the steel pipe of the T-shaped structure to be detected. In the extension, the extension angle is adjusted through the rotary connection between the lower end of the support frame 4 and the bidirectional drive motor 3. At the same time, the winding device 11 starts to wind the rope 12, which drives the change of the angle of the support frame 4 and the hollow support rod 2. Then, the elastic deformation of the support frame 4 makes the hollow support rod 2 continue to move downward until the hollow support rod 2 remains in the vertical state. At this time, the bidirectional support rod is pulled upward, and under the combined action of the elastic reset force of the support frame 4, the inflation sealing structure in the storage state is in the vertical upward extending state and contacts the inner wall of the upper end of the steel pipe, preventing the existence of gaps in the inflation sealing structure sealing part. Then, the posture adjusting structure is adjusted so that each inflation sealing structure is located at the corresponding position of the inner wall of the steel pipe. Then, the position of the inflation sealing structure in the extended part of the steel pipe is determined by the electric telescopic rod 13 at the lower end of the support frame 4. After adjusting the position of each inflation sealing structure, the inflation sealing structure can be controlled to complete the sealing action.

[0025] When the plugging is carried out, the bidirectional driving motor 3 or the driving motor connected by the expansion plugging structure is vertically arranged. The bidirectional driving motor 3 is bidirectional because the two expansion plugging structures matched with the bidirectional driving motor 3 need upward and synchronous movement force, so the driving screw rotation direction of the bidirectional driving motor 3 is opposite, that is, the expansion plugging structures in the upward and downward directions of the vertical arrangement can be expanded at the same time, and the expansion plugging structures on the side use a driving motor alone. In the movement process of each movement block, the rotating connecting rod 10 connected to each movement block is driven. Since one end of the rotating connecting rod 10 is rotatably connected to the movement block and the other end is rotatably connected to the corresponding arc-shaped support 8, and the arc-shaped movement piece is connected between the arc-shaped movement piece and the annular rubber ring 7, the arc-shaped support 8 will be expanded outward during the movement of the movement block, and the arc-shaped support 8 will be deformed by extrusion during the movement outward, thereby realizing the extrusion sealing effect. At the same time, the positions of adjacent arc-shaped movement pieces will change when each arc-shaped movement piece moves outward. On the one hand, it is necessary to ensure that the two adjacent arc-shaped movement pieces can be unfolded and moved, and at the same time, it is necessary to ensure that the support force of the corresponding area is still retained after unfolding. Therefore, the two ends of each arc-shaped movement piece are only in contact with the annular rubber ring 7, not fixedly connected, and the ends of adjacent arc-shaped movement pieces are staggered. When each expansion plugging structure moves respectively, the T-shaped structure is welded and the division action is completed. At this time, all areas welded are in the same sealed space.

[0026] Then, after positioning is completed, the closed area is pressurized by the air pressure delivery pipe 1, and the pressure of the closed area is monitored by the pressure sensor 5 on the bidirectional driving motor 3 during the pressurization process. If the detected pressure value is unchanged, it means that there is no gap in the welded part. If the pressure value decreases, it needs to be detected whether there is impurity between the expansion plugging structure and the inner wall of the steel pipe. At this time, the plugging part can be replaced and the test can be repeated. If the results of multiple detections all have air leakage phenomenon and the numerical difference of the air leakage phenomenon is not large, and there is no impurity in the expansion plugging structure, it means that there is a gap in the welded part. Or, during the pressurization process, it can be judged whether there is air leakage phenomenon by listening to the sound. A liquid with viscosity, such as a liquid mixed with water and washing-up liquid, can also be applied to the welded part. If there is air leakage, bubbles will be generated.

[0027] And the gas pressure input through the air pressure delivery pipe 1, because the steel pipe upper and lower ends are supported respectively, the internal space exists a large amount of air pressure, if at this time directly make the expansion plugging structure reset, on the one hand because the expansion plugging structure is through the hemispherical end to block, at this time the air pressure is internal air pressure, so direct reset exists larger pressure, if forcibly reset will lead to the corresponding components easy to damage or lead to the change of precision, so need to the one-way conduction structure to carry on the deflation treatment, deflation, press the press bar 19 located outside the conduction shell 16, press the press bar 19 inwards press will extrude the sealing ball 18, make the sealing ball 18 move, and the sealing ball 18 moves will lose the sealing force, thus achieve the purpose of deflation, after deflation can make the expansion plugging structure reset, then release the winding device 11, the winding device 11 after release, the hollow support rod 2 and the support frame 4 between through the reset torsional spring 14 reset, then take out can.

Claims

1. A device for detecting the quality of a weld of a steel pipe, characterized by, The utility model provides a kind of attitude adjustment structure, and the end of attitude adjustment structure is equipped with inflation plugging structure, and the attitude adjustment structure includes hollow support rod (2), and the middle part of hollow support rod (2) is equipped with two-way drive motor (3), and the both ends of hollow support rod (2) are fixedly connected with inflation plugging structure driven by two-way drive motor (3), and the shell of two-way drive motor (3) is rotatably connected with support frame (4), and support frame (4) is arc frame and support frame (4) end is fixedly connected with inflation plugging structure, and the end of inflation plugging structure on the end of support frame (4) is connected with air pressure delivery pipe (1) by one-way communication structure, and two-way drive motor (3) is fixedly connected with pressure sensor (5) on it. It also includes a line spool (11) fixedly connected to the support frame (4), a vertical through hole is formed in the support frame (4) corresponding to the position of the line spool (11), and a rope (12) is arranged in the vertical through hole, one end of the rope (12) is fixedly connected to the two-way drive motor (3), and the other end extends into the line spool (11).

2. The apparatus for inspecting the weld quality of a steel pipe according to claim 1, wherein The inflation plugging structure includes a sealing cap (6) fixedly connected to the hollow support rod (2), the sealing cap (6) is provided with an annular rubber ring (7), a plurality of arc-shaped support members (8) are fixedly connected in the annular rubber ring (7), a moving block (9) is slidably connected in the hollow support rod (2), the moving block (9) and the corresponding arc-shaped support member (8) are connected by a rotating connecting rod (10), the rotating connecting rod (10) is rotatably connected between the both ends and the inner side of the moving block (9) and the arc-shaped support member (8), and the moving block (9) is threadedly connected with the rotating shaft of the two-way drive motor (3).

3. The apparatus for inspecting the weld quality of a steel pipe according to claim 1, wherein The middle part of the support frame (4) is an electric telescopic rod (13), the lower end of the support frame (4) is rotatably connected with the two-way drive motor (3), and the rotating connection part of the support frame (4) and the two-way drive motor (3) is provided with a reset torsional spring (14).

4. The apparatus for inspecting the weld quality of a steel pipe according to claim 2, wherein The both ends of the arc-shaped support member (8) are respectively provided with a connecting bayonet (15), and the bayonets at the both ends of the adjacent arc-shaped support members (8) are interlaced.

5. The apparatus for inspecting the weld quality of a steel pipe according to claim 1, wherein The one-way communication structure includes a communication shell (16), a pressure spring (17) is arranged in the communication shell (16), a sealing ball (18) is pressed on the upper end of the pressure spring (17), a vertical pressing rod (19) is arranged on the upper end of the communication shell (16), and the position of the pressing rod (19) is matched with the upper end of the sealing ball (18).

6. The apparatus for inspecting the weld quality of a steel pipe according to claim 1, wherein The thread rods rotatably connected with the rotating shafts at the both ends of the two-way drive motor (3) are in opposite directions.

7. The apparatus for inspecting the weld quality of a steel pipe according to claim 2, wherein The sealing cap (6) is an oval support body (20), a flexible connecting sheet (21) is connected outside the support body, the annular rubber ring (7) is connected to the outer side of the connecting sheet (21), the arc-shaped support member (8) is fixedly connected between the middle part and the annular rubber ring (7), and the both ends are slidably connected with the annular rubber ring (7).

8. The apparatus for inspecting the weld quality of a steel pipe according to claim 2, wherein The rotating connecting rods (10) are respectively matched with corresponding arc-shaped supporting members (8), the rotating connecting rods (10) are uniformly distributed and connected on the moving blocks (9) in a circumferential direction, and the rotating connecting rods (10) are uniformly distributed and symmetrically arranged along the circumferential direction of the rotating shaft of the bidirectional driving motor (3).

9. The apparatus for inspecting the weld quality of a steel pipe according to claim 4, wherein The supporting frame (4) is made of elastic material.

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