Weld joint detection device for pipeline flaw detection

Abstract

The invention relates to the technical field of flaw detection, in particular to a weld joint detection device for pipeline flaw detection, which comprises a pipeline placing table, a linear moving device is mounted on the pipeline placing table, a moving seat is mounted on the linear moving device, and an ultrasonic flaw detection module is mounted on the moving seat; a hydraulic rod is further fixedly installed on the movable base, an installation frame is fixedly installed at the tail end of an output shaft of the hydraulic rod, a main belt wheel is arranged on the front side of the installation frame, a wheel shaft of the main belt wheel is rotationally connected to the installation frame, the two sides of the lower portion of the main belt wheel are each provided with an auxiliary belt wheel, and a rotary grinding belt is installed between the main belt wheel and the two auxiliary belt wheels in a matched mode. The rotary grinding belt is mounted between the main belt wheel and the two auxiliary belt wheels in a triangular shape, and the two auxiliary belt wheels are arranged to be in a transversely telescopic state, so that the rotary grinding belt can deform in the grinding process, and the surfaces of a square pipeline and a round pipeline can be fully ground.

Description

Technical Field

[0001] The invention relates to the technical field of flaw detection, and in particular to a weld detection device for pipeline flaw detection. Background Art

[0002] In the process of flaw detection of pipeline welds, the weld surface needs to be polished first to remove the oxide on the weld surface, and then the polished surface needs to be cleaned to avoid dust or debris remaining on the polishing sheet (the effect of dust on ultrasonic flaw detection is mainly reflected in the attenuation and reflection performance of ultrasonic signals. Dust will adhere to the surface of the ultrasonic probe, causing the propagation of sound waves to be hindered, thereby affecting the penetration ability and detection accuracy of ultrasonic waves. Specifically, dust will weaken the energy of sound waves, make the sound beam smaller, and thus reduce the maximum detection distance of the ultrasonic sensor. In addition, dust may also change the propagation path of sound waves, resulting in inaccurate detection results). Finally, the coupling agent is applied to the cleaned polished surface, and then the ultrasonic flaw detector is operated to perform flaw detection on the polished surface. In the above operation process, since the detection surface needs to be polished, the usual method of polishing is to use a polishing machine for polishing. Manual operation is inefficient, and since the pipelines faced are mainly square tubes and round tubes, when polishing round tubes, the contact area between the polisher and the pipeline surface is small, further reducing the polishing efficiency. In addition, after polishing, the manual application of coupling agent is also slow, which restricts the improvement of detection speed. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art that manual grinding of round pipes is low in efficiency and requires manual application of coupling agent, and to propose a weld detection device for pipeline flaw detection.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A weld detection device for pipeline flaw detection is designed, comprising a pipeline placement platform, a linear moving device is installed on the pipeline placement platform, a moving seat is installed on the linear moving device, and an ultrasonic flaw detection module is installed on the moving seat; A hydraulic rod is also fixedly mounted on the movable seat, and a mounting frame is fixedly mounted on the end of the output shaft of the hydraulic rod, a main pulley is arranged on the front side of the mounting frame, the wheel axle of the main pulley is rotatably connected to the mounting frame, a secondary pulley is respectively arranged on both sides below the main pulley, the wheel axles of the secondary pulleys are both laterally telescopically connected to the mounting frame, and a rotary grinding belt is cooperatively mounted between the main pulley and the two secondary pulleys so that the rotary grinding belt is in the shape of an equilateral triangle.

[0005] A coupling agent applicator is arranged above the main pulley, and a discharge port of the coupling agent applicator is arranged corresponding to the surface of the rotating grinding belt above the top of the main pulley.

[0006] Preferably, the axle of the main pulley is transmission-connected with a driver, and the driver is fixed on a mounting frame.

[0007] Preferably, the rotary grinding belt is made of a wire mesh, and a water box is installed below the main pulley.

[0008] Preferably, a plurality of transverse grooves are provided on the surface of the main pulley along the circumferential direction, and the bottom of the main pulley extends into the water box.

[0009] Preferably, a plurality of drip holes are formed through the bottom of the water storage box, a water inlet pipe connected to the water storage box is provided on one side of the water storage box, the water inlet pipe is fixed on the mounting frame, and the water inlet pipe is connected to the water supply device.

[0010] Preferably, the discharge port of the coupling agent applicator is in the shape of an elongated strip and is arranged parallel to the width direction of the rotary grinding belt.

[0011] Preferably, the ultrasonic flaw detection module includes a mechanical arm, the mechanical arm is installed on a movable seat, an ultrasonic probe is installed on the mechanical arm, and the ultrasonic probe is electrically connected to a host.

[0012] Preferably, a transverse axis is fixed on the mounting frame, and a sleeve is telescopically installed on both sides of the transverse axis along its length direction, the sleeve is arranged in a one-to-one correspondence with the two small pulleys, and the corresponding sleeve is fixedly connected to the secondary pulley.

[0013] The invention provides a weld detection device for pipeline flaw detection, which has the following beneficial effects: The rotary grinding belt is installed in a triangular shape between the main pulley and the two secondary pulleys, and the two secondary pulleys are arranged to be able to be laterally retracted, so that the rotary grinding belt can be deformed during the grinding process, thereby efficiently grinding the surfaces of square pipes and round pipes; The rotating grinding belt is made of a steel wire mesh, and is matched with a water box arranged under the main pulley, so that the main pulley can lift the water in the water box and spray it to the rotating grinding belts on both sides. After the lifted water passes through the steel wire mesh on the surface of the rotating grinding belt, it can wash away the debris attached to the steel wire mesh, so that the rotating grinding belt can still maintain a high degree of cleanliness during long-term grinding work, and avoid debris from mixing into the coupling agent during the subsequent coupling agent application process; A coupling agent applicator is also provided above the main pulley, so that after grinding is completed, the coupling agent can be applied to the running rotating grinding belt through the coupling agent applicator, and then the rotating grinding belt can be used to quickly and evenly apply the coupling agent to the grinding surface of the pipeline surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A schematic diagram of the structure of a weld detection device for pipeline flaw detection proposed by the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of a weld detection device for pipeline flaw detection proposed by the present invention Figure 2 ; Figure 3 A schematic diagram of the partial structure of a moving base of a weld detection device for pipeline flaw detection proposed by the present invention; Figure 4 Schematic diagram of the position structure of the rotating grinding belt of a weld inspection device for pipeline flaw detection proposed by the present invention Figure 1 ; Figure 5 Schematic diagram of the position structure of the rotating grinding belt of a weld detection device for pipeline flaw detection proposed by the present invention Figure 2 ; Figure 6 A schematic diagram of the working state structure of a weld detection device for pipeline flaw detection proposed by the present invention Figure 1 ; Figure 7 A schematic diagram of the working state structure of a weld detection device for pipeline flaw detection proposed by the present invention Figure 2 .

[0015] In the figure: 1. Pipe placement table; 2. Linear moving device; 3. Moving seat; 4. Hydraulic rod; 5. Robotic arm; 6. Ultrasonic probe; 7. Mounting frame; 8. Main pulley; 9. Driver; 10. Secondary pulley; 11. Rotary grinding belt; 12. Horizontal axis; 13. Sleeve; 14. Water box; 15. Drip hole; 16. Water inlet pipe; 17. Coupling agent applicator. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Example 1: Reference Figure 1 - Figure 3 , Figure 7 , a weld detection device for pipeline flaw detection, comprising a pipeline placement platform 1, a linear moving device 2 is installed on the pipeline placement platform, a moving seat 3 is installed on the linear moving device 2, and an ultrasonic flaw detection module is installed on the moving seat 3; A hydraulic rod 4 is also fixedly mounted on the movable seat 3, and a mounting frame 7 is fixedly mounted on the end of the output shaft of the hydraulic rod 4. A main pulley 8 is arranged on the front side of the mounting frame 7, and the wheel shaft of the main pulley 8 is rotatably connected to the mounting frame 7. A secondary pulley 10 is respectively arranged on both sides below the main pulley 8, and the wheel shafts of the secondary pulleys 10 are both laterally telescopically connected to the mounting frame 7. A rotary grinding belt 11 is installed between the main pulley 8 and the two secondary pulleys 10, so that the rotary grinding belt 11 is in the shape of an equilateral triangle; By arranging the two secondary pulleys 10 in a state that they can be laterally extended and retracted, the rotary grinding belt 11 can fully grind the surfaces of both square pipes and circular pipes.

[0018] A coupling agent applicator 17 is provided above the primary pulley 8, and the discharge port of the coupling agent applicator 17 is provided corresponding to the surface of the rotating grinding belt 11 above the top of the primary pulley 8. By arranging the coupling agent applicator 17 above the primary pulley 8, after grinding is completed, the coupling agent can be applied to the surface of the primary pulley 8 through the coupling agent applicator. As the primary pulley 8 rotates, new parts of the rotating grinding belt 11 are continuously moved under the coupling agent applicator 17, so that more surfaces of the rotating grinding belt 11 can be coated with the coupling agent.

[0019] The wheel shaft of the main pulley 8 is connected to a driver 9 , and the driver 9 is fixed on the mounting frame 7 .

[0020] The discharge port of the coupling agent applicator 17 is in a long strip shape and is arranged parallel to the width direction of the rotary grinding belt 11. The coupling agent applicator 17 includes a feeding pipe, one end of which is provided with a feeding head, which is in a flat triangular shape, and the other end of the feeding pipe is connected to a coupling agent feeding device through a hose.

[0021] The ultrasonic flaw detection module includes a mechanical arm 5, which is mounted on a moving base 3, and an ultrasonic probe 6 is mounted on the mechanical arm 5, and the ultrasonic probe 6 is electrically connected to a host. By providing the mechanical arm 5, the ultrasonic probe 6 can be driven by the mechanical arm 5 with high flexibility to move freely on the weld surface of the pipeline, thereby obtaining more accurate detection data.

[0022] A transverse axis 12 is fixed on the mounting frame 7 , and a sleeve 13 is telescopically installed on both sides of the transverse axis 12 along its length direction. The sleeve 13 is arranged in a one-to-one correspondence with the two small pulleys, and the corresponding sleeve 13 is fixedly connected to the secondary pulley 10 .

[0023] Example 2: Reference Figure 4 - Figure 5As another preferred embodiment of the present invention, the difference from the embodiment 1 is that the rotary grinding belt 11 is made of a steel mesh, and a water box 14 is installed under the main pulley 8. By using the steel mesh to make the rotary grinding belt 11, the water permeability of the rotary grinding belt 11 is high. In this way, with the water box 14 arranged under the main pulley 8, the main pulley 8 can lift the water in the water box 14 and spray it to the rotary grinding belt 11 on both sides. After passing through the steel mesh on the surface of the rotary grinding belt 11, the lifted water can wash away the debris attached to the steel mesh. In this way, the rotary grinding belt 11 can still maintain a high degree of cleanliness during long-term grinding work, and avoid debris from mixing into the coupling agent during the subsequent coupling agent application process. The pore size of the steel mesh is small, so that the coupling agent can be retained on the steel mesh. The mesh texture on the rotary grinding belt 11 made of steel mesh can also increase the friction between it and the main pulley 8.

[0024] The surface of the main pulley 8 is provided with a plurality of transverse grooves along the circumferential direction, and the bottom of the main pulley 8 extends into the water box 14. By providing the transverse grooves, the main pulley 8 can use the transverse grooves to lift the water in the water box 14 during the rotation process, so that the main pulley 8 can throw more water to the rotating grinding belts 11 on both sides. In addition, the transverse grooves can form a toothed structure for the main pulley 8, and combined with the mesh surface of the rotating grinding belt 11, the main pulley 8 can obtain the same friction efficiency as the rotating grinding belt 11. When the main pulley 8 rotates, it can drive the rotating grinding belt 11 to move (similar to the driving method of the sprocket and the chain), avoiding the slipping of the rotating grinding belt 11, so as to improve the grinding efficiency.

[0025] A plurality of drip holes 15 are formed through the bottom of the water box 14. A water inlet pipe 16 connected to the water box 14 is provided on one side of the water box 14. The water inlet pipe 16 is fixed on the mounting frame 7 and connected to the water supply device. The drip holes 15 are provided so that when water is input into the water box 14, a small amount of water can drip onto the rotating grinding belt 11 below through the drip holes 15, so that the rotating grinding belt 11 below can be wetted by the dripping water while grinding the surface of the pipeline, so as to realize wet grinding and avoid dust from being raised. At the same time, the temperature of the rotating grinding belt 11 and the pipeline surface can be reduced.

[0026] The overall workflow of the present invention is as follows: Clamp the pipe on the pipe placement table, and arrange the pipe corresponding to the movable seat 3, and then control the linear moving device 2 to drive the movable seat 3 to move, so that the rotary grinding belt 11 installed on the movable seat 3 can move to the position just above the weld on the pipe; When facing a square tube, Figure 6 As shown, the hydraulic rod 4 can drive the mounting frame 7 to move downward so that the rotating grinding belt 11 maintains parallel contact with the surface of the square tube; when facing a round tube, as shown in the attached Figure 7 As shown, the hydraulic rod 4 drives the mounting frame 7 to move downward, so that the lower part of the rotary grinding belt 11 can be in an arc shape to cover the upper surface of the round tube. In this process, the two secondary pulleys 10 move synchronously along the horizontal axis 12 toward the middle to adapt to the deformed rotary grinding belt 11; then the driver 9 is started, and the driver 9 drives the main pulley 8 to rotate, so that the rotary grinding belt 11 can perform a rotary motion, so that the square tube or the round tube can be polished; During the grinding process, the water supply device inputs water into the water box 14. At this time, since the lower part of the main pulley 8 extends into the water box 14, when the water floods the bottom of the main pulley 8, the rotating main pulley 8 will bring up the water and throw it to the rotating grinding belts 11 on both sides, so that the rotating grinding belts 11 can be washed clean by the thrown water when passing near the main pulley 8, so as to avoid the debris remaining in the grinding process from adhering to it. A part of the water in the water box 14 will drip onto the rotating grinding belt 11 on the surface of the pipe through the drip hole 15 at the bottom of the water box 14, so as to wash the polished surface of the pipe surface, and ensure that there is no debris remaining on the polished surface; After the grinding is completed, the hydraulic rod 4 is controlled to drive the mounting frame 7 to move upward, so that the rotating grinding belt 11 is separated from the pipeline surface, and then the coupling agent supply device is controlled to input the coupling agent into the coupling agent applicator 17, and the coupling agent applicator 17 applies the coupling agent to the rotating grinding belt 11 on the top of the main pulley 8. At the same time, the rotating grinding belt 11 performs a rotating motion, so that a part of the rotating grinding belt 11 can be coated with the coupling agent, and then the coupling agent supply device is stopped, and the rotating grinding belt 11 can align the part coated with the coupling agent with the grinding surface of the pipeline, and then the hydraulic rod 4 is controlled to drive the mounting frame 7 to move upward, so that the rotating grinding belt 11 coated with the coupling agent can contact the pipeline surface, so that the coupling agent is applied to the grinding surface, and finally the hydraulic rod 4 drives the mounting frame 7 to reset; Finally, the linear moving device 2 is controlled to drive the moving seat 3 to move, so that the mechanical arm 5 can be aligned with the polishing surface, and then the mechanical arm 5 is controlled to drive the ultrasonic probe 6 to perform ultrasonic flaw detection on the polishing sheet coated with the coupling agent.

[0027] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A weld inspection device for pipeline flaw detection, comprising a pipeline placement table (1), characterized in that: The pipeline placement platform (1) is provided with a linear moving device (2), the linear moving device (2) is provided with a moving seat (3), and the moving seat (3) is provided with an ultrasonic flaw detection module; A hydraulic rod (4) is also fixedly mounted on the movable seat (3); a mounting frame (7) is fixedly mounted on the end of the output shaft of the hydraulic rod (4); a main pulley (8) is arranged on the front side of the mounting frame (7); the wheel shaft of the main pulley (8) is rotatably connected to the mounting frame (7); two sides below the main pulley (8) are respectively provided with a secondary pulley (10); the wheel shafts of the secondary pulleys (10) are laterally telescopically connected to the mounting frame (7); a rotary grinding belt (11) is cooperatively mounted between the main pulley (8) and the two secondary pulleys (10), so that the rotary grinding belt (11) is in the shape of an equilateral triangle; A coupling agent applicator (17) is arranged above the main pulley (8), and an outlet of the coupling agent applicator (17) is arranged corresponding to the surface of the rotating grinding belt (11) above the top of the main pulley (8).

2. The weld detection device for pipeline flaw detection according to claim 1, characterized in that: The wheel shaft of the main pulley (8) is connected to a driver (9) through transmission, and the driver (9) is fixed on the mounting frame (7).

3. The weld detection device for pipeline flaw detection according to claim 1, characterized in that: The rotary grinding belt (11) is made of a steel mesh, and a water box (14) is installed below the main pulley (8).

4. The weld detection device for pipeline flaw detection according to claim 3, characterized in that: The surface of the main pulley (8) is provided with a plurality of transverse grooves along the circumferential direction, and the bottom of the main pulley (8) extends into the water storage box (14).

5. The weld detection device for pipeline flaw detection according to claim 3, characterized in that: A plurality of drip holes (15) are formed through the bottom of the water storage box (14), and a water inlet pipe (16) connected to the water storage box (14) is provided on one side of the water storage box (14). The water inlet pipe (16) is fixed on the mounting frame (7), and the water inlet pipe (16) is connected to the water supply device.

6. The weld detection device for pipeline flaw detection according to claim 1, characterized in that: The discharge port of the coupling agent applicator (17) is in the shape of an elongated strip and is arranged parallel to the width direction of the rotating grinding belt (11).

7. The weld detection device for pipeline flaw detection according to claim 1, characterized in that: The ultrasonic flaw detection module comprises a mechanical arm (5), wherein the mechanical arm (5) is mounted on a movable seat (3), an ultrasonic probe (6) is mounted on the mechanical arm (5), and the ultrasonic probe (6) is electrically connected to a host.

8. The weld detection device for pipeline flaw detection according to claim 1, characterized in that: A transverse axis (12) is fixed on the mounting frame (7), and a sleeve (13) is telescopically mounted on both sides of the transverse axis (12) along its length direction. The sleeve (13) is arranged in one-to-one correspondence with the two small pulleys, and the corresponding sleeve (13) is fixedly connected to the secondary pulley (10).

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