High-temperature pressure-bearing equipment welding seam surface defect array eddy current detection equipment and detection method thereof

Abstract

The invention relates to the technical field of defect detection, in particular to high-temperature pressure-bearing equipment weld surface defect array eddy current detection equipment and a detection method thereof.The high-temperature pressure-bearing equipment weld surface defect array eddy current detection equipment comprises an array eddy current detector body and a detection shell which are connected together through a connecting line, and further comprises a lift-off base arranged at the lower end of an inner cavity of the detection shell; concave holes are formed in the left end and the right end of the top of the lift-off base. Under the action of the anti-skid moving wheels and the detection shell, the device has the advantage of high detection precision in a non-stop state, and solves the problem that when the surface defects of the welding seam on the plane of the high-temperature pressure-bearing equipment are detected in the prior art, due to the fact that the surface temperature of the welding seam is generally high when the high-temperature pressure-bearing equipment is not stopped, the detection precision is high. The problems that the impedance drift of a probe coil is easily caused by the higher temperature of the probe, and the fluctuation of the lift-off distance is easily caused in the mobile detection process of detection equipment due to the unevenness of the surface of a welding seam, so that the detection precision of the detection equipment is reduced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of defect detection, and specifically to an array eddy current detection device and a detection method for weld surface defects of high-temperature pressure-bearing equipment. Background Technique

[0002] High-temperature pressure-bearing equipment refers to equipment that can withstand internal pressure in a high-temperature environment and is usually used in industrial production and special environments. Boilers are one of the most common types, especially pressure boilers. They work at high temperatures, generating steam or hot water by burning fuel for heating and industrial production. And the array eddy current detection device is a device that uses the eddy current principle for weld detection. Its core lies in a probe composed of multiple independent coils, which can comprehensively scan the weld and detect tiny defects. The array eddy current detection technology has wide applications in multiple fields.

[0003] Currently, when detecting weld surface defects of high-temperature pressure-bearing equipment, a defect array eddy current detection device is required. However, when detecting weld surface defects on the plane of high-temperature pressure-bearing equipment, due to the influence of the usually high temperature on the weld surface when the high-temperature pressure-bearing equipment is operating without shutdown, the high temperature easily causes impedance drift of the probe coil, and the unevenness of the weld surface easily causes fluctuations in the lift-off distance during the movement of the detection device, reducing the detection accuracy of the detection device. We propose an array eddy current detection device and a detection method for weld surface defects of high-temperature pressure-bearing equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide an array eddy current detection device and a detection method for weld surface defects of high-temperature pressure-bearing equipment, which have the advantage of high detection accuracy in the non-shutdown state, and solve the problem that when detecting weld surface defects on the plane of high-temperature pressure-bearing equipment, due to the influence of the usually high temperature on the weld surface when the high-temperature pressure-bearing equipment is operating without shutdown, the high temperature easily causes impedance drift of the probe coil, and the unevenness of the weld surface easily causes fluctuations in the lift-off distance during the movement of the detection device, reducing the detection accuracy of the detection device.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An array eddy current detection device for weld surface defects of high-temperature pressure-bearing equipment, including an array eddy current detector main body and a detection housing connected together through a connecting wire, and further including:

[0006] A lift-off seat arranged at the lower end of the inner cavity of the detection housing. Concave holes are opened at both the left and right ends of the top of the lift-off seat, and lift-off springs are fixedly connected between the bottom of the inner cavity of the concave hole and the top of the inner cavity of the detection housing;

[0007] A cooling and temperature - reducing cavity is opened on the inner surface of the upper end of the detection housing. An orifice - shaped liquid - passing cavity is opened on the inner surface of the upper end of the lift - off seat. A liquid - guiding hose is connected between the left end of the orifice - shaped liquid - passing cavity and the left end of the cooling and temperature - reducing cavity, and a return hose is connected between the right end of the orifice - shaped liquid - passing cavity and the right end of the cooling and temperature - reducing cavity. An array probe is installed at the bottom of the lift - off seat.

[0008] The above - mentioned technical solution has the following technical advantages:

[0009] Stable lift - off distance: The lift - off spring buffers the influence of the unevenness of the weld surface, maintains a constant distance between the array probe and the weld, and reduces detection errors.

[0010] Active temperature reduction: The coolant circulation system continuously cools the array probe, avoids the coil impedance drift caused by high temperature, and ensures the detection accuracy.

[0011] No need to stop the machine for detection: It can directly operate in a high - temperature operating environment, improving production efficiency.

[0012] Preferably, a display screen is arranged on the front of the array eddy current detector main body. Support and protection rubber sleeves are fixedly installed at the four corners of the array eddy current detector main body. A handle is fixedly installed in the middle of the top of the array eddy current detector main body. The display screen visually displays data, and the handle is convenient for carrying the device to complex sites; the protection rubber sleeves reduce bump damage and extend the service life of the device.

[0013] Preferably, a partition plate is arranged in the middle of the bottom of the cooling and temperature - reducing cavity, and the height of the partition plate is two - thirds of the height of the cooling and temperature - reducing cavity. This structure can optimize the heat dissipation path, extend the flow time of the coolant, improve the heat dissipation efficiency, and ensure the stability of the cooling effect.

[0014] Preferably, adjustment cavities are opened on the front and back sides of the left and right ends of the lift - off seat, and a sealing cavity is arranged inside the adjustment cavity at the right end of the lift - off seat.

[0015] Preferably, a rectangular guiding strip is fixedly connected to one side of the lower end of the inner cavity of the adjustment cavity. A return spring is sleeved outside the rectangular guiding strip. One end of the return spring is fixedly connected to a guiding sleeve that slides on the outer surface of the rectangular guiding strip. An active part is fixedly connected to the outer surface of the guiding sleeve near one end of the return spring, and a guiding ball is fixedly connected to the side of the guiding sleeve away from the return spring. This structure can achieve dynamic compensation: when the anti - slip moving wheel moves along the weld surface, the height of the probe is automatically adjusted through the spring and the guiding structure to adapt to the surface unevenness; it can automatically drive the flow of the coolant: the rotation of the moving wheel is converted into the driving force of the impeller, reducing the dependence on external energy.

[0016] Preferably, both the front and rear ends on the left side inside the mouth-shaped liquid passage cavity are movably connected by bearings to a rotating shaft extending into the adjusting cavity at the left end of the lifting seat. One end of the outer surface of the rotating shaft located in the mouth-shaped liquid passage cavity is fixedly installed with a driving impeller. One side of the rotating shaft located in the adjusting cavity is fixedly installed with a turntable. The left side of the turntable is fixedly connected with a guiding pin rod. An inner surface at the upper end of the movable part located in the adjusting cavity at the left end of the lifting seat is provided with a guiding rail groove adapted to the guiding pin rod. A metal cooling cover fitted to the array probe is embedded in the inner wall of the bottom of the lifting seat. On one side inside the mouth-shaped liquid passage cavity, a plurality of heat conducting fins connected to the metal cooling cover are provided. This structure can achieve efficient heat dissipation: the heat conducting fins and the metal cover quickly conduct the heat of the probe to the coolant to prevent local overheating; self-driven circulation: mechanical linkage realizes the driving of the coolant flow without an external pumping device.

[0017] Preferably, one side of the movable part located in the adjusting cavity at the right end of the lifting seat is fixedly connected with a connecting piece, and one side of the connecting piece is fixedly installed with a sealing plug sliding in the sealing cavity. This structure can achieve sealing guarantee: the movement of the sealing plug adjusts the reliability of air flow inhalation and discharge.

[0018] Preferably, both the left and right sides at the front and rear ends of the lifting seat are movably connected by bearings to a rotating rod. The outer surface of the rotating rod is fixedly connected with a driving and guiding wheel plate adapted to the guiding ball. One side of the rotating rod away from the lifting seat is fixedly installed with an anti-slip moving wheel. This structure can achieve stable movement: the anti-slip wheels ensure that the equipment moves smoothly along the weld seam, reducing the interference of jitter on detection; mechanical energy conversion: the moving kinetic energy is converted into the driving force of the cooling system to improve the energy efficiency utilization rate.

[0019] Preferably, both the front and rear ends of the bottom of the lifting seat are fixedly installed with ventilation strips. One side of the ventilation strip is communicated with a plurality of inclined spray pipes. A cleaning scraping block is adhesively bonded to the bottom of the ventilation strip. The bottom of the sealing cavity is communicated with a connecting pipe. A gas guide pipe is communicated between the right end of the connecting pipe and the ventilation strip. A first one-way valve is arranged at one end of the gas guide pipe close to the connecting pipe. The lower end of the connecting pipe is communicated with an air inlet pipe. A second one-way valve is arranged at one end of the air inlet pipe. This structure can achieve surface cleaning: the spray pipes blow and the cleaning scraping block synchronously remove the oxide scale and dust on the surface of the weld seam to reduce detection interference; air flow regulation: the one-way valves ensure the one-way flow of the air flow to form a continuous blowing force to improve the detection environment.

[0020] A method for array eddy current detection of surface defects of high-temperature pressure-bearing equipment weld seams specifically includes the following steps:

[0021] S1: Carry the array eddy current detector main body to the working position by using the handle, and connect the array eddy current detector main body to the detection shell through the connecting wire;

[0022] S2: By turning on this device and making the detection housing drive the anti-slip moving wheels to contact the weld surface of the high-temperature pressure-bearing device, when the detection housing drives the anti-slip moving wheels to move along the weld surface, dust removal can be carried out on the weld surface, the array probe can be cooled down, and the lift-off distance of the array probe reaching the weld surface can be kept constant at all times;

[0023] S3: The array probe can transmit the monitored data to the main body of the array eddy current detector, and the display screen will display it intuitively.

[0024] The above steps are achieved through the combination of mechanical transmission, heat conduction design and electronic detection system:

[0025] High-temperature adaptability: It can directly operate on high-temperature pressure-bearing equipment without shutting down, overcoming the limitation of traditional detection that requires shutdown for cooling and improving production efficiency. Full-automatic operation: The whole process of moving, cleaning, cooling and detecting does not require manual intervention, reducing labor intensity and human error. Improvement of detection accuracy and reliability: The three functions of constant lift-off distance, active cooling and surface cleaning work together to ensure the accuracy and repeatability of detection results under complex working conditions.

[0026] The above technical solutions have the following technical advantages:

[0027] Portability and easy operation of step S1: The handle design makes the device easy to carry to the high-temperature environment site, especially suitable for complex space operations, reducing the labor intensity of personnel. Equipment protection: The main body of the array eddy current detector is equipped with a supporting protective rubber sleeve to avoid bump damage and extend the service life of the equipment. Stable connection: The connecting wire ensures the reliability of signal transmission between the detector and the detection housing, reducing the risk of interruption during the detection process.

[0028] Self-stabilization of lift-off distance in step S2:

[0029] The rotation of the anti-slip moving wheels drives the guide wheel plate, combined with the lift-off spring of the guide ball, return spring and lift-off seat, to dynamically compensate for the unevenness of the weld surface. The lift-off spring provides a buffer force to keep the array probe always at a constant distance (lift-off distance) from the weld surface, avoiding distortion of detection signals caused by distance fluctuations and improving sensitivity.

[0030] Active cooling to prevent temperature drift:

[0031] The rotation of the anti-slip moving wheels drives the impeller through mechanical transmission, promoting the circulation of the coolant between the mouth-shaped liquid passage cavity and the cooling and temperature reduction cavity. The heat conduction fins and metal cooling cover conduct the heat of the array probe to the coolant, avoiding impedance drift of the probe coil caused by high-temperature environment, ensuring detection accuracy, and supporting the long-term operation of the equipment at the same time.

[0032] Synchronous surface cleaning:

[0033] The cleaning scraping block scrapes off attachments such as scale and dust on the surface of the weld seam, and the spray pipe further removes residual impurities through continuous air flow blowing. This function eliminates the interference of surface contamination on the eddy current signal, especially suitable for the scenario of oxide layer shedding that is likely to occur in high-temperature environments, ensuring the accuracy of the detection results.

[0034] Self-driving energy-saving design:

[0035] The mechanical movement of the anti-slip moving wheels is directly converted into the reciprocating movement of the impeller drive and the sealing plug. There is no need for an additional power source to drive the cooling system and the air pump, reducing energy consumption and adapting to industrial sites without external power sources.

[0036] Real-time data feedback in step S3: The detection signal is transmitted to the main body of the detector at high speed through the connecting wire, and the display screen immediately presents the eddy current detection image and defect parameters, facilitating the on-site judgment of the weld quality by the operator.

[0037] Intuitive defect positioning: The visual interface of the display screen supports the rapid identification of the defect position, size and depth, guiding subsequent repair or re-inspection work and reducing the manual analysis time.

[0038] Data recording and traceability: The main body of the detector can integrate a data storage module to save the detection results to generate reports or compare historical data, meeting the compliance requirements of industrial detection.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] The present invention drives the anti-slip moving wheels through the detection housing to contact the surface of the weld seam of the high-temperature pressure-bearing equipment. When the anti-slip moving wheels are driven by the detection housing to move along the surface of the weld seam, it can remove dust from the surface of the weld seam, cool down the array probe, and always keep the lift-off distance of the array probe reaching the surface of the weld seam constant, realizing the ability of high detection accuracy under the condition of non-stop operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic structural diagram of the first perspective of the present invention;

[0042] Figure 2 is a schematic cross-sectional structural diagram of the second perspective of the present invention;

[0043] Figure 3 is a schematic cross-sectional structural diagram of the third perspective of the present invention;

[0044] Figure 4 is a schematic cross-sectional structural diagram of the fourth perspective of the present invention;

[0045] Figure 5 is an exploded structural diagram of the present invention;

[0046] Figure 6Schematic diagram of the mating structure of the driving guide wheel plate and the guide sleeve of the present invention;

[0047] Figure 7 Schematic diagram of the mating structure of the ventilation strip and the connecting pipe of the present invention;

[0048] Figure 8 Schematic diagram of the connecting member and the sealing plug of the present invention.

[0049] In the figure: 1. Main body of the array eddy current detector; 101. Support and protection rubber sleeve; 102. Handle; 103. Display screen; 2. Connecting wire; 3. Detection housing; 301. Cooling and temperature reduction chamber; 302. Partition plate; 303. Anti-slip moving wheel; 304. Rectangular guide strip; 305. Return spring; 306. Driving guide wheel plate; 307. Liquid guide hose; 308. Return hose; 309. Movable part; 310. Rotating rod; 311. Guide ball; 312. Guide pin rod; 313. Guide rail groove; 314. Turntable; 315. Rotating rod; 316. Driving impeller; 317. Connecting member; 318. Sealing plug; 319. Guide sleeve; 4. Array probe; 5. Ventilation strip; 501. Cleaning scraping block; 502. Spray pipe; 503. Air guide pipe; 504. First one-way valve; 505. Air inlet pipe; 506. Second one-way valve; 507. Connecting pipe; 6. Lift-off seat; 601. Mouth-shaped liquid passage chamber; 602. Metal temperature reduction cover; 603. Heat conduction fins; 604. Concave hole; 605. Lift-off spring; 606. Sealing chamber; 607. Adjusting chamber. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The main body 1 of the array eddy current detector, the support and protection rubber sleeve 101, the handle 102, the display screen 103, the connecting wire 2, the detection housing 3, the cooling cavity 301, the partition plate 302, the anti-slip moving wheel 303, the rectangular guide bar 304, the return spring 305, the driving guide wheel plate 306, the liquid guide hose 307, the return hose 308, the movable part 309, the rotating rod 310, the guide ball 311, the guide pin rod 312, the guide rail groove 313, the turntable 314, the rotating shaft 315, the driving impeller 316, the connecting part 317, the sealing plug 318, the guide sleeve 319, the array probe 4, the ventilation strip 5, the cleaning scraping block 501, the spray pipe 502, the air guide pipe 503, the first one-way valve 504, the air inlet pipe 505, the second one-way valve 506, the communication pipe 507, the lift-off seat 6, the mouth-shaped liquid passage cavity 601, the metal cooling cover 602, the heat conduction fin 603, the concave hole 604, the lift-off spring 605, the sealing cavity 606 and the adjustment cavity 607 components of the present application are all common standard components or components known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0054] Embodiment 1

[0055] Please refer to Figures 1-8 As shown in the figure, the present invention provides a technical solution: a high-temperature pressure-bearing equipment weld surface defect array eddy current detection device, including an array eddy current detector main body 1 and a detection housing 3 connected together through a connecting wire 2, and further including:

[0056] A lift-off seat 6 is arranged at the lower end of the inner cavity of the detection housing 3. Concave holes 604 are formed at both the left and right ends of the top of the lift-off seat 6. A lift-off spring 605 is fixedly connected between the bottom of the inner cavity of the concave hole 604 and the top of the inner cavity of the detection housing 3;

[0057] A cooling cavity 301 is formed on the inner surface of the upper end of the detection housing 3. A mouth-shaped liquid passage cavity 601 is formed on the inner surface of the upper end of the lift-off seat 6. A liquid guide hose 307 is communicated between the left end of the mouth-shaped liquid passage cavity 601 and the left end of the cooling cavity 301. A return hose 308 is communicated between the right end of the mouth-shaped liquid passage cavity 601 and the right end of the cooling cavity 301. An array probe 4 is installed at the bottom of the lift-off seat 6.

[0058] On the front of the main body 1 of the array eddy current detector, there is a display screen 103. At the four corners of the main body 1 of the array eddy current detector, there are support and protection rubber sleeves 101 fixedly installed. In the middle of the top of the main body 1 of the array eddy current detector, there is a handle 102 fixedly installed. At the front and rear sides of the left and right ends of the lift-off seat 6, there are adjustment cavities 607 opened. Inside the adjustment cavity 607 at the right end of the lift-off seat 6, there is a sealing cavity 606. On one side of the lower end of the inner cavity of the adjustment cavity 607, there is a rectangular guide bar 304 fixedly connected. Outside the rectangular guide bar 304, there is a return spring 305 sleeved. One end of the return spring 305 is fixedly connected with a guide sleeve 319 sliding on the outer surface of the rectangular guide bar 304. On the outer surface of the guide sleeve 319 near one end of the return spring 305, there is a movable part 309 fixedly connected. On the side of the guide sleeve 319 away from the return spring 305, there is a guide ball 311 fixedly connected. At the front and rear ends on the left side inside the mouth-shaped liquid passage cavity 601, there are rotating shafts 315 rotatably connected through bearings and extending into the adjustment cavity 607 at the left end of the lift-off seat 6. On the outer surface of one end of the rotating shaft 315 located inside the mouth-shaped liquid passage cavity 601, there is a driving impeller 316 fixedly installed. On one side of the rotating shaft 315 located inside the adjustment cavity 607, there is a turntable 314 fixedly installed. On the left side of the turntable 314, there is a guide pin rod 312 fixedly connected. Inside the adjustment cavity 607 at the left end of the lift-off seat 6, on the inner surface of the upper end of the movable part 309, there is a guide rail groove 313 adapted to the guide pin rod 312. On the inner wall of the bottom of the lift-off seat 6, there is a metal cooling cover 602 fitted with the array probe 4. On one side inside the mouth-shaped liquid passage cavity 601, there are a plurality of heat conducting fins 603 connected to the metal cooling cover 602. On one side of the movable part 309 inside the adjustment cavity 607 at the right end of the lift-off seat 6, there is a connecting part 317 fixedly connected. On one side of the connecting part 317, there is a sealing plug 318 sliding inside the sealing cavity 606. At the left and right sides of the front and rear ends of the lift-off seat 6, there are rotating rods 310 rotatably connected through bearings. On the outer surface of the rotating rod 310, there is a driving guide wheel plate 306 adapted to the guide ball 311 fixedly connected. On the side of the rotating rod 310 away from the lift-off seat 6, there is an anti-slip moving wheel 303 fixedly installed.

[0059] Technical solution: Carry the array eddy current detector main body 1 to the working position through the handle 102. Connect the array eddy current detector main body 1 to the detection housing 3 through the connecting wire 2. Then, after turning on the device, drive the anti-slip moving wheels 303 through the detection housing 3 to be placed on both sides of the weld of the device, and make the array probe 4 as close to the weld surface as possible. When the detection housing 3 drives the array probe 4 to move along the weld surface, the anti-slip moving wheels 303 can rotate accordingly. When the anti-slip moving wheels 303 rotate, they will drive the rotating rod 310 and the driving guide wheel plate 306 to rotate. And because the guide ball 311 contacts the outer surface of the driving guide wheel plate 306, when the driving guide wheel plate 306 rotates, it will drive the guide ball 311 to drive the guide sleeve 319 to slide left and right on the outer surface of the rectangular guide bar 304. With the cooperation of the return spring 305, the guide ball 311 can always contact the outer surface of the driving guide wheel plate 306. When the guide sleeve 319 slides left and right on the outer surface of the rectangular guide bar 304, it will drive the movable part 309 to move synchronously. And with the assistance of the guide rail groove 313, when the guide pin rod 312 slides inside the guide rail groove 313, it can drive the turntable 314 and the rotating shaft 315 to rotate. When the rotating shaft 315 rotates, it will drive the driving impeller 316 to rotate. Thus, it can provide driving force for the coolant at the left end of the inner cavity of the mouth-shaped liquid passage cavity 601 to flow to the right end of the inner cavity of the mouth-shaped liquid passage cavity 601. And with the assistance of the liquid guide hose 307 and the return hose 308, the cooling cavity 301 and the mouth-shaped liquid passage cavity 601 can achieve circular flow. And with the assistance of the heat conduction fins 603, the metal cooling cover 602 can cool the working array probe 4, which can effectively reduce the adverse effects caused by the high temperature of the weld during the startup state on the array probe 4, ensure the detection accuracy of the array probe 4, and can extend its working duration. At the same time, if there are uneven concave platforms on the weld surface, the lift-off seat 6 can compress the lift-off spring 605 at the lower end inside the detection housing 3, so that the distance between the array probe 4 and the weld surface is in a constant state, avoiding the situation of floating lift-off spacing and ensuring the detection accuracy of the device.

[0060] An array eddy current detection method for surface defects of high-temperature pressure-bearing equipment welds specifically includes the following steps:

[0061] S1: Carry the array eddy current detector main body 1 to the working position by using the handle 102, and connect the array eddy current detector main body 1 to the detection housing 3 through the connecting wire 2;

[0062] S2: Turn on the device, and make the detection housing 3 drive the anti-slip moving wheels 303 to contact the weld surface of the high-temperature pressure-bearing equipment. When the detection housing 3 drives the anti-slip moving wheels 303 to move along the weld surface, it can remove dust from the weld surface, cool the array probe 4, and always keep the lift-off distance between the array probe 4 and the weld surface constant;

[0063] S3: The array probe 4 can transmit the monitored data to the main body 1 of the array eddy current detector, and the display screen 103 intuitively displays it.

[0064] This technical solution: It is convenient to use and operate, which is beneficial for the staff to use, and can improve the detection accuracy and working duration of the equipment, and improve the applicability of the equipment.

[0065] Embodiment 2

[0066] Based on Embodiment 1, as shown in the present invention Figures 1-8 it is disclosed that a partition plate 302 is provided at the middle end of the bottom of the cooling cavity 301, and the height of the partition plate 302 is two-thirds of the height of the cooling cavity 301.

[0067] This technical solution: Through the setting of the partition plate 302, it can play a certain blocking ability on the flowing cooling coolant, improve the heat dissipation duration of the coolant, and ensure the heat dissipation effect of the equipment.

[0068] Embodiment 3

[0069] Based on Embodiment 1, as shown in the present invention Figures 1-8 it is disclosed that ventilation strips 5 are fixedly installed at both the front and rear ends of the bottom of the lift-off seat 6. A plurality of inclined spray pipes 502 are communicated on one side of the ventilation strip 5. A cleaning scraping block 501 is bonded to the bottom of the ventilation strip 5. A communicating pipe 507 is communicated with the bottom of the sealing cavity 606. A guide pipe 503 is communicated between the right end of the communicating pipe 507 and the ventilation strip 5. A first one-way valve 504 is provided at one end of the guide pipe 503 close to the communicating pipe 507. An air inlet pipe 505 is communicated with the lower end of the communicating pipe 507. A second one-way valve 506 is provided at one end of the air inlet pipe 505.

[0070] The present technical solution: Through the provision of the cleaning scraping block 501, when the detection housing 3 moves, the cleaning scraping block 501 can clean the impurities on the surface of the weld seam (because under high-temperature conditions, the oxide scale will expand, which can cause an additional increase in the lift-off distance, and high temperature will sinter loose dust into an insulating hard shell). Through the provision of the ventilation strip 5, when the anti-slip moving wheel 303 at the right end of the lift-off seat 6 rotates, it will drive the corresponding rotating rod 310 and the driving guide wheel plate 306 to rotate. And since the guide ball 311 contacts the outer surface of the driving guide wheel plate 306, when the driving guide wheel plate 306 rotates, it will drive the guide ball 311 to drive the guide sleeve 319 to slide left and right on the outer surface of the rectangular guide strip 304. Through the cooperation of the return spring 305, the guide ball 311 can always contact the outer surface of the driving guide wheel plate 306. When the guide sleeve 319 slides left and right on the outer surface of the rectangular guide strip 304, it will drive the movable member 309 to move synchronously. At this time, the moving movable member 309 will drive the sealing plug 318 to move telescopically in the sealing cavity 606 through the connecting member 317. And with the assistance of the air inlet pipe 505, the second one-way valve 506 and the connecting pipe 507, gas can be provided to the sealing cavity 606. The settings of the connecting pipe 507, the air guide pipe 503 and the first one-way valve 504 can transport the gas inhaled into the sealing cavity 606 into the ventilation strip 5 and spray it out under pressure through the nozzle 502. Thus, it can exert the ability to blow the impurities on the surface of the weld seam under pressure. And the blowing under pressure cooperates with the cleaning scraping block 501 to ensure the cleanliness of the surface of the weld seam, which is conducive to improving the detection accuracy of the equipment.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An array eddy current detection device for surface defects of welds of high-temperature pressure-bearing equipment, comprising an array eddy current detector main body (1) and a detection housing (3) connected together through a connecting wire (2), characterized in that, It further includes: A lift-off seat (6) disposed at the lower end of the inner cavity of the detection housing (3). Concave holes (604) are formed at both the left and right ends of the top of the lift-off seat (6). A lift-off spring (605) is fixedly connected between the bottom of the inner cavity of the concave hole (604) and the top of the inner cavity of the detection housing (3); A cooling cavity (301) formed on the inner surface of the upper end of the detection housing (3). An orifice-shaped liquid passage cavity (601) is formed on the inner surface of the upper end of the lift-off seat (6). A liquid guide hose (307) is communicated between the left end of the orifice-shaped liquid passage cavity (601) and the left end of the cooling cavity (301). A return hose (308) is communicated between the right end of the orifice-shaped liquid passage cavity (601) and the right end of the cooling cavity (301). An array probe (4) is installed at the bottom of the lift-off seat (6).

2. The array eddy current testing device for surface defects of weld seams of a high-temperature pressure-bearing device according to claim 1, characterized in that: A display screen (103) is disposed on the front surface of the array eddy current detector main body (1). Support and protection rubber sleeves (101) are fixedly installed at the four corners of the array eddy current detector main body (1). A handle (102) is fixedly installed at the middle end of the top of the array eddy current detector main body (1).

3. An array eddy current testing device for surface defects of welds of high-temperature pressure-bearing equipment according to claim 1, characterized in that: A partition plate (302) is disposed at the middle end of the bottom of the cooling cavity (301), and the height of the partition plate (302) is two-thirds of the height of the cooling cavity (301).

4. An array eddy current testing device for surface defects of weld seams of high-temperature pressure-bearing equipment according to claim 1, characterized in that: Adjustment cavities (607) are formed on the front and rear sides of both the left and right ends of the lift-off seat (6). A sealing cavity (606) is disposed inside the adjustment cavity (607) at the right end of the lift-off seat (6).

5. An array eddy current testing device for surface defects of weld seams of high-temperature pressure-bearing equipment according to claim 4, characterized in that: One side of the lower end of the inner cavity of the adjustment cavity (607) is fixedly connected with a rectangular guide bar (304). A return spring (305) is sleeved outside the rectangular guide bar (304). One end of the return spring (305) is fixedly connected with a guide sleeve (319) that slides on the outer surface of the rectangular guide bar (304). An active part (309) is fixedly connected to the outer surface of the guide sleeve (319) near one end of the return spring (305). A guide ball (311) is fixedly connected to the side of the guide sleeve (319) away from the return spring (305).

6. An array eddy current testing device for surface defects of weld seams of high-temperature pressure-bearing equipment according to claim 5, characterized in that: Both the front and rear ends on the left side inside the orifice-shaped liquid passage cavity (601) are movably connected through bearings with a rotating shaft (315) extending into the adjustment cavity (607) at the left end of the lift-off seat (6). A driving impeller (316) is fixedly installed at one end of the outer surface of the rotating shaft (315) located inside the orifice-shaped liquid passage cavity (601). A turntable (314) is fixedly installed on one side of the rotating shaft (315) located inside the adjustment cavity (607). A guide pin rod (312) is fixedly connected to the left side of the turntable (314). A guide rail groove (313) adapted to the guide pin rod (312) is formed on the inner surface of the upper end of the active part (309) located inside the adjustment cavity (607) at the left end of the lift-off seat (6). A metal cooling cover (602) that fits the array probe (4) is embedded in the inner wall of the bottom of the lift-off seat (6). A plurality of heat conducting fins (603) connected to the metal cooling cover (602) are disposed on one side inside the orifice-shaped liquid passage cavity (601).

7. An array eddy current testing device for surface defects of weld seams of high-temperature pressure-bearing equipment according to claim 6, characterized in that: One side of the movable part (309) located inside the adjustment cavity (607) at the right end of the lift-off seat (6) is fixedly connected with a connecting part (317), and one side of the connecting part (317) is fixedly installed with a sealing plug (318) sliding in the sealing cavity (606).

8. An array eddy current testing device for surface defects of weld seams of high-temperature pressure-bearing equipment according to claim 7, characterized in that: Both the left and right sides of the front and rear ends of the lift-off seat (6) are movably connected with rotating rods (310) through bearings. The outer surface of the rotating rod (310) is fixedly connected with a driving guide wheel plate (306) adapted to the guide ball (311), and one side of the rotating rod (310) far from the lift-off seat (6) is fixedly installed with an anti-slip moving wheel (303).

9. An array eddy current testing device for surface defects of welds of high-temperature pressure-bearing equipment according to claim 8, characterized in that: Both the front and rear ends of the bottom of the lift-off seat (6) are fixedly installed with ventilation strips (5). One side of the ventilation strip (5) is communicated with a plurality of inclined spray pipes (502). The bottom of the ventilation strip (5) is adhesively connected with a cleaning scraping block (501). The bottom of the sealing cavity (606) is communicated with a connecting pipe (507). A gas guide pipe (503) is communicated between the right end of the connecting pipe (507) and the ventilation strip (5). A first one-way valve (504) is arranged at one end of the gas guide pipe (503) close to the connecting pipe (507). The lower end of the connecting pipe (507) is communicated with an air inlet pipe (505), and a second one-way valve (506) is arranged at one end of the air inlet pipe (505).

10. An array eddy current testing method for surface defects of welds in high-temperature pressure-bearing equipment, characterized in that: The detection method includes a surface defect array eddy current detection device for high-temperature pressure-bearing equipment welds according to any one of claims 1 to 9, specifically including the following steps: S1: Carry the array eddy current detector main body (1) to the working position by using the handle (102), and connect the array eddy current detector main body (1) with the detection shell (3) through the connecting wire (2); S2: By turning on the device, make the detection shell (3) drive the anti-slip moving wheel (303) to contact the surface of the weld of the high-temperature pressure-bearing equipment. When the detection shell (3) drives the anti-slip moving wheel (303) to move along the weld surface, the dust on the weld surface can be removed, the array probe (4) can be cooled, and the lift-off distance of the array probe (4) reaching the weld surface can be kept constant at all times; S3: The array probe (4) can transmit the monitored data to the array eddy current detector main body (1), and the display screen (103) displays it intuitively.

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