CN111239045B

CN111239045B - Underwater welding seam auxiliary detection device

Info

Publication number: CN111239045B
Application number: CN202010113597.6A
Authority: CN
Inventors: 刘积厚; 牛红伟; 卢雅琳; 王健; 丛孟启; 刘骁
Original assignee: Jiangsu University of Technology
Current assignee: Jiangsu University of Technology
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2023-09-22
Anticipated expiration: 2040-02-24
Also published as: CN111239045A

Abstract

The invention relates to an underwater welding seam auxiliary detection device which comprises a clear water tank, a dilution tank and a detection mechanism for detecting welding seam defects, wherein the clear water tank is communicated with the dilution tank through a power mechanism and a water pipe, the clear water tank is communicated with a clear water source, a partition plate is arranged in the dilution tank, the dilution tank is divided into a water inlet cavity and a dilution cavity which are mutually communicated by the partition plate, a probe of the detection mechanism is slidably arranged in the dilution cavity through a lifting mechanism, the bottom of the clear water tank is transparent glass, a through hole is formed in the bottom of the clear water tank, and the position of the through hole corresponds to the position of the probe. The invention detects the underwater welding seam, is convenient and quick, and has low cost; the clear water is adopted to dilute turbid water, so that the probe can conveniently detect the periphery of a welding seam, the thought is novel, the application range is wide, and the method is suitable for different welding seam detection situations.

Description

Underwater welding seam auxiliary detection device

Technical Field

The invention belongs to the technical field of welding detection, and particularly relates to an underwater welding seam auxiliary detection device.

Background

As is well known, the welding process itself can create various defects, which can cause damage to the product during long-term use, or even create safety hazards, especially for welded products used under water or below sea surface, internal defects are generally detected by non-destructive inspection, which is often adopted in underwater installation and repair processes. The underwater nondestructive testing technology is late in starting in China, the detection means is late, the detection precision is low, the requirements of actual engineering cannot be met, particularly, a large gap exists between the traditional detection field and abroad, and the traditional detection method is high in cost and long in detection time.

The traditional detection technology is difficult to adapt to special marine environments in China. In offshore areas of China, particularly near the inlet of Bohai sea yellow river, the suspended sediment particles are more, and in most cases, the sea water is in a turbid state, and the visibility is very low, so that great inconvenience is brought to the underwater operation of divers. Both uk and australia are studying underwater imaging techniques in turbid environments, but until now this problem has not been well addressed. Conventional underwater visual inspection (e.g., eyesight, underwater video, underwater television, etc.) is generally difficult to implement in turbid water environments. Therefore, how to clearly carry out nondestructive testing on a welding part under turbid water is a technical problem which is mainly solved.

Disclosure of Invention

The invention provides an underwater welding seam auxiliary detection device which aims to solve the problem that welding seam defects are difficult to detect under turbid water.

Preferably, the number of the partition plates is two, the two partition plates divide the dilution box into two water inlet cavities and one dilution cavity which are mutually communicated, the two dilution cavities are positioned on two sides of the water inlet cavities, the two partition plates are respectively positioned on two sides of the probe, the two partition plates are fixedly connected through a connecting plate, a mounting hole is formed in the connecting plate, a protective cover is movably arranged in the mounting hole, the protective cover extends out of the dilution box and is in transmission connection with the lifting mechanism, the probe is arranged in the protective cover, and the size of the mounting hole is larger than that of the protective cover. The safety cover can slide from top to bottom in the mounting hole, and the size in the mounting hole is greater than the size of safety cover, makes things convenient for diluting the circulation of intracavity water.

Further, elevating system includes fixed plate, lead screw, U type frame and two guide pillars, U type frame with the guide pillar is all fixed to be set up on the dilution case, the fixed plate with safety cover fixed connection, the fixed plate slides and sets up on the guide pillar, the lead screw rotates to set up on the U type frame and with fixed plate threaded connection, the one end that the fixed plate was kept away from to the lead screw is equipped with the turning handle. The screw rod rotates to be arranged in the fixed hole, the rotating handle is rotated, and the screw rod rotates to drive the fixed plate to move up and down, so that the upper and lower positions of the protective cover are adjusted, the distance between the probe and the through hole is finally adjusted, and the detection is convenient.

Preferably, the power mechanism is a water pump. The water pump pumps the water in the clean water tank into the water inlet cavity to dilute turbid water in the water inlet cavity.

Further, a spray head is arranged in one of the water inlet cavities, and the spray head is communicated with the water pipe. Adopts a spray head structure. So that the sprayed water can be quickly dispersed to various parts of the dilution tank to accelerate the dispersion.

Preferably, the partition board close to the spray head is provided with an upper layer filter hole, the partition board far away from the spray head is provided with a lower layer filter hole, and the upper layer filter hole and the lower layer filter hole are respectively positioned on the upper side and the lower side of the connecting plate. The water inlet cavity where the spray head is located sprays water into the dilution cavity from the upper part of the partition plate, and the other water inlet cavity sprays into the dilution cavity from the lower part of the partition plate, so that flushing is more directional, dilution efficiency is improved, and if the partition plate is provided with too many filter holes, water pressure dispersion can be caused, and dilution effect is weakened. The arrangement of the filtering holes is beneficial to buffering the speed of flowing water, avoids inconvenience for the detection of the probe due to overlarge flow speed, and simultaneously prevents sundries in turbidity from entering the water inlet cavity to influence the dilution effect.

Further, the detection mechanism is in signal connection with the probe through a detection wire.

Preferably, in order to facilitate moving the device, the dilution box is further provided with a push rod.

The beneficial effects are that: the invention detects the underwater welding seam, is convenient and quick, and has low cost; the clear water is adopted to dilute turbid water, so that the probe can conveniently detect the periphery of a welding seam, the thought is novel, the application range is wide, and the method is suitable for different welding seam detection situations.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of a sprinkler head according to the present invention;

FIG. 3 is a schematic view of a lifting mechanism according to the present invention;

FIG. 4 is a schematic view of the internal structure of the dilution tank of the invention;

1. a clean water tank; 2. a detection mechanism; 3. a dilution tank; 4. a water pipe; 5. a water pump; 6. a spray head; 7. a push rod; 8. a U-shaped frame; 9. a guide post; 10. a screw rod; 11. a protective cover; 12. a fixing plate; 13. a rotating handle; 14. a partition plate; 15. a connecting plate; 16. a through hole; 17. a mounting hole; 18. a water inlet cavity; 19. an upper layer filter hole; 20. a dilution chamber; 21. and filtering holes at the lower layer.

Detailed Description

As shown in the figure, the underwater welding seam auxiliary detection device comprises a clear water tank 1, a dilution tank 3 and a detection mechanism 2 for detecting welding seam defects, wherein the clear water tank 1 is communicated with the dilution tank 3 through a power mechanism and a water pipe 4, the clear water tank 1 is communicated with a clear water source, a partition plate 14 is arranged in the dilution tank 3, the partition plate 14 divides the dilution tank 3 into a water inlet cavity 18 and a dilution cavity 20 which are mutually communicated, a probe of the detection mechanism 2 is slidably arranged in the dilution cavity 20 through a lifting mechanism, the bottom of the dilution tank is transparent glass, a through hole 16 is formed in the bottom of the dilution tank, and the position of the through hole 16 corresponds to the position of the probe.

The number of the partition boards 14 is two, the two partition boards 14 divide the dilution box into two water inlet cavities 18 and one dilution cavity 20 which are mutually communicated, the two dilution cavities 20 are positioned on two sides of the water inlet cavities 18, the two partition boards 14 are respectively positioned on two sides of the probe, the two partition boards 14 are fixedly connected through a connecting plate 15, mounting holes 17 are formed in the connecting plate 15, a protective cover 11 is movably arranged in the mounting holes 17, the protective cover 11 extends out of the dilution box and is in transmission connection with the lifting mechanism, the probe is arranged in the protective cover 11, and the size of the mounting holes 17 is larger than that of the protective cover 11. The lifting mechanism comprises a fixed plate 12, a screw rod 10, a U-shaped frame 8 and two guide posts 9, wherein the U-shaped frame 8 and the guide posts 9 are fixedly arranged on the dilution box, the fixed plate 12 is fixedly connected with a protective cover 11, the fixed plate 12 is slidably arranged on the guide posts 9, the screw rod 10 is rotatably arranged on the U-shaped frame 8 and is in threaded connection with the fixed plate 12, and a rotating handle 13 is arranged at one end of the screw rod 10 away from the fixed plate 12. The power mechanism is a water pump 5.

A spray head 6 is arranged in one of the water inlet cavities 18, and the spray head 6 is communicated with the water pipe 4. The partition plate 14 close to the spray head 6 is provided with an upper layer filter hole 19, the partition plate 14 far away from the spray head 6 is provided with a lower layer filter hole 21, and the upper layer filter hole 19 and the lower layer filter hole 21 are respectively positioned on the upper side and the lower side of the connecting plate 15. The detection mechanism 2 is in signal connection with the probe through a detection wire. The dilution tank 3 is also provided with a push rod 7.

Working principle: the transparent bottom plate of the dilution tank 3 is close to a part to be detected, the through hole 16 is aligned with a weld joint to be detected, the water pump 5 is started, water in the clean water tank 1 rapidly enters the dilution tank 3 through the water pipe 4, water in one water inlet cavity 18 is sprayed from the upper part of the dilution cavity 20, water in the other water inlet cavity is sprayed from the lower part of the dilution cavity 20, turbid water in the dilution tank 3 is discharged from the bottom through hole 16, after a period of time, the dilution tank 3 is filled with clear water, namely clear water is arranged at the through hole 16, detection of weld joint defects by a probe is facilitated, and then the device is moved until the detection of the whole weld joint is completed.

Claims

1. An auxiliary detection device of an underwater welding seam is characterized in that: the device comprises a clean water tank (1), a dilution tank (3) and a detection mechanism (2) for detecting weld defects, wherein the clean water tank (1) is communicated with the dilution tank (3) through a power mechanism and a water pipe (4), the clean water tank (1) is communicated with a clean water source, a partition plate (14) is arranged in the dilution tank (3), the dilution tank (3) is partitioned into a water inlet cavity (18) and a dilution cavity (20) which are communicated with each other by the partition plate (14), a probe of the detection mechanism (2) is slidably arranged in the dilution cavity (20) through a lifting mechanism, the bottom of the dilution tank (3) is made of transparent glass, a through hole (16) is formed in the bottom of the dilution tank (3), and the position of the through hole (16) corresponds to the position of the probe;

the number of the partition boards (14) is two, the two partition boards (14) divide the dilution tank (3) into two water inlet cavities (18) and one dilution cavity (20) which are communicated with each other, the two dilution cavities (20) are positioned at two sides of the water inlet cavities (18), the two partition boards (14) are respectively positioned at two sides of the probe, the two partition boards (14) are fixedly connected through a connecting plate (15), a mounting hole (17) is formed in the connecting plate (15), a protective cover (11) is movably arranged in the mounting hole (17), the protective cover (11) extends out of the clean water tank (1) and is in transmission connection with the lifting mechanism, the probe is arranged in the protective cover (11), and the size of the mounting hole (17) is larger than that of the protective cover (11);

the power mechanism is a water pump (5), a spray head (6) is arranged in one water inlet cavity (18), and the spray head (6) is communicated with the water pipe (4) and the water pump (5); the other water inlet cavity (18) is provided with a water inlet which is communicated with the water pipe (4) and the other water pump (5); be close to be equipped with upper filter hole (19) on baffle (14) of shower nozzle (6), keep away from be equipped with lower floor's filtration hole (21) on baffle (14) of shower nozzle (6), upper filter hole (19) with lower floor's filtration hole (21) are located respectively the upper and lower both sides of connecting plate (15).

2. The underwater weld joint auxiliary detection apparatus as defined in claim 1, wherein: elevating system includes fixed plate (12), lead screw (10), U type frame (8) and two guide pillar (9), U type frame (8) with guide pillar (9) are all fixed to be set up on diluting case (3), fixed plate (12) with safety cover (11) fixed connection, fixed plate (12) sliding set up on guide pillar (9), lead screw (10) rotate set up on U type frame (8) and with fixed plate (12) threaded connection, one end that fixed plate (12) was kept away from to lead screw (10) is equipped with swivel handle (13).

3. The underwater weld joint auxiliary detection apparatus as defined in claim 1, wherein: the detection mechanism (2) is in signal connection with the probe through a detection wire.

4. The underwater weld joint auxiliary detection apparatus as defined in claim 1, wherein: the dilution box (3) is also provided with a push rod (7).