Cantilever type end face flange sealing ring ultrasonic probing device and method

Abstract

The invention discloses a cantilever type end face flange sealing ring ultrasonic probing device and method.The cantilever type end face flange sealing ring ultrasonic probing device comprises a centering height supporting unit, a rotation driving unit, a detection position cantilever adjusting unit and a cantilever type ultrasonic detection unit, and the rotation driving unit is arranged on the centering height supporting unit; the detection position cantilever adjusting unit is arranged on the rotary driving unit, the cantilever type ultrasonic detection unit is arranged on the detection position cantilever adjusting unit, and the cantilever type ultrasonic detection unit is used for detecting a sealing ring in a flange. The device can complete the detection work of the in-service sealing ring in the end face flange in a whole circle, is especially suitable for being used when the end face flange is almost embedded into a certain plane, is simple in structure, is simple and convenient to operate, is low in cost, and can support the automatic detection work; the method is also suitable for surface nondestructive testing of other end face parts; the corrosion to the surface of the to-be-tested piece can be reduced, and the consumption of water resources can be reduced by adopting local water immersion environment soft sealing.

Description

Technical Field

[0001] This invention specifically relates to an ultrasonic testing device and method for cantilever end-face flange sealing rings. Background Technology

[0002] In ultrasonic monitoring technology, the contact method between the probe and the specimen directly affects the transmission efficiency and monitoring effect of ultrasonic waves. Based on the contact method, it can be divided into direct contact method, liquid immersion method, and electromagnetic coupling method. The direct contact method requires direct contact between the probe and the specimen surface with a certain pressure, making it unsuitable for specimens with uneven surfaces or obstacles, and potentially damaging the probe surface. The electromagnetic coupling method is typically used in high-temperature environments, corrosive environments, or rough surfaces; however, for every additional wavelength of winding distance between the electromagnetic coil and the specimen surface, the ultrasonic signal amplitude decreases by approximately 100 dB. Its equipment cost is high, and its sensitivity is lower than traditional methods. The liquid immersion method is suitable for specimen surfaces with obstacles, such as uneven or concave surfaces. The liquid coupling agent can fill these irregular areas, completely eliminating the interference of air gaps on ultrasonic wave transmission. The coupling is stable, and the monitoring results are highly repeatable. Because it does not directly contact the surface, probe wear is avoided when monitoring along a specific trajectory on the specimen surface, making it more suitable for automated monitoring. The coupling agent for the liquid immersion method can be oil or water. Since water is widely available, low-cost, clean, and easy to clean, it is suitable for a wide range of industrial monitoring scenarios.

[0003] Water immersion ultrasonic monitoring can be further divided into full immersion, partial immersion, and water spray methods, depending on the specific application. Full immersion is suitable for specimens with small monitoring areas and simple shapes. For specimens with complex surfaces, a cantilever method can be used, which is further divided into liquid spray, overflow, and water-through methods. Liquid spray and overflow methods require continuous water spraying onto the specimen surface, resulting in significant water waste. However, for specimens with obstructed surfaces, the water-through method cannot completely seal the surface, also causing some water waste, and is not suitable for ultrasonic monitoring of such specimens.

[0004] For monitoring in-service sealing rings using ultrasonic probes with limited surface space and bolt obstruction, the shape and placement of the ultrasonic monitoring device are limited. The aforementioned structures are insufficient for completing full-circumference inspections of flanges of different shapes or thicknesses. Addressing the shortcomings of water-immersion ultrasonic monitoring instruments, this invention allows for the placement of a localized water-immersion ultrasonic probe on the flange surface within a limited space. Its detection range is a ring-shaped monitoring area, ensuring a relatively stable localized water immersion environment on the flange surface with bolt obstruction. It exhibits good adaptability to flanges of different diameters. In particular, for certain end-face flange seals where the flange is almost embedded in the sealing plane, this invention can successfully complete the scanning task for both vertically and horizontally placed end-face flanges. The detector is convenient to install and disassemble, simple to use, easy for workers to operate, requires few motors, has a simple structure, and is economical. Summary of the Invention

[0005] The purpose of this invention is to provide an ultrasonic testing device and method for cantilever end-face flange sealing rings, which can complete the monitoring of in-service sealing rings in end-face flanges throughout the entire circumference. It is particularly suitable for end-face flanges that are almost embedded in a certain plane. It has a simple structure, is easy to operate, has low cost, and can realize automatic testing. It is also suitable for non-destructive testing of the surface of other end-face parts. It can reduce corrosion on the surface of the test piece, and by using soft sealing for local water immersion environments, it can reduce water consumption.

[0006] The technical solution adopted in this invention is: An ultrasonic testing device for a cantilevered end-face flange sealing ring includes a centering height support unit, a rotary drive unit, a detection position cantilever adjustment unit, and a cantilevered ultrasonic testing unit. The rotary drive unit is mounted on the centering height support unit, the detection position cantilever adjustment unit is mounted on the rotary drive unit, and the cantilevered ultrasonic testing unit is mounted on the detection position cantilever adjustment unit. The cantilevered ultrasonic testing unit is used to detect the sealing ring inside the flange. The cantilevered ultrasonic testing unit includes an ultrasonic probe mounting plate, an ultrasonic probe, a water curtain, and a pipe connector. The pipe connector is connected and fixed to the ultrasonic probe mounting plate. The ultrasonic probe is mounted on the ultrasonic probe mounting plate and extends into the pipe connector. The ultrasonic probe is positioned facing the water outlet at the lower end of the pipe connector. The water curtain is fitted onto the water outlet at the lower end of the pipe connector. A water pipe is connected to one side of the pipe connector.

[0007] Preferably, the centering height support unit includes a support bend, an upright, and a counterweight base. The lower end of the upright is connected to the counterweight base, the lower end of the support bend is sleeved with the upper end of the upright, and can move and extend along the upright. The upper end of the support bend is connected to a rotation drive unit.

[0008] Preferably, a telescopic tube limit lock is provided between the upright and the support tube, and the lower end of the upright is threadedly connected to the counterweight base through a fastening knob a. The counterweight base is provided with an upright positioning screw, and one end of the upright positioning screw passes through the counterweight base and is connected to the upright.

[0009] Preferably, it also includes a concentric support bend and a height adjustment bend, wherein the support bend is replaced by a concentric support bend and a height adjustment bend, the upper end of the upright is sleeved with the lower end of the height adjustment bend, the upper end of the height adjustment bend is sleeved with one end of the concentric support bend through a locking sleeve, and the other end of the concentric support bend is connected to the rotary drive unit.

[0010] Preferably, it also includes a height-adjusting upright and two radius-adjusting bends. The support bends are replaced by the height-adjusting upright. The lower end of the height-adjusting upright is sleeved with the upper end of the upright. The upper end of the height-adjusting upright is connected to the fixed end face of the rotary drive unit. The two radius-adjusting bends are a first radius-adjusting bend and a second radius-adjusting bend. One end of the first radius-adjusting bend is connected to the movable end face of the rotary drive unit. The other end of the first radius-adjusting bend is sleeved with one end of the second radius-adjusting bend through a locking sleeve. The other end of the second radius-adjusting bend is connected to the detection position cantilever adjustment unit.

[0011] Preferably, the rotary drive unit includes a motor, a drive base, and a drive disk. The motor is fixed on the drive base, and the drive disk is mounted on the drive base via a rotating shaft or bearing. The motor is connected to the drive disk via a gear set, and the motor drives the drive disk to rotate via the gear set.

[0012] Preferably, the detection position cantilever adjustment unit includes a disc connecting rod, connecting rod a, connecting rod b, a monitoring unit mounting rod, a detection radius holding rod, a detection distance holding rod, a fastening knob b, and a connecting bend. One end of the disc connecting rod is connected to the rotary drive unit, the other end of the disc connecting rod is hinged to one end of connecting rod a, the other end of connecting rod a is hinged to one end of connecting rod b, and the other end of connecting rod b is hinged to the monitoring unit mounting rod. One end of the detection distance holding rod is fixedly connected to the disc connecting rod, and the other end of the detection distance holding rod is connected to the connecting bend. The connecting bend is connected to the monitoring unit mounting rod through the detection radius holding rod. The monitoring unit mounting rod is used to connect and install the cantilever ultrasonic monitoring unit.

[0013] Preferably, the pipe fitting is a tee adapter, the upper end of the straight section of the tee adapter is connected and fixed to the ultrasonic probe mounting plate, the water curtain is sleeved on the lower end of the straight section of the tee adapter, and the water pipe is sleeved on the horizontal branch pipe of the tee adapter.

[0014] Preferably, the water curtain is connected to the pipe joint through a transparent cover.

[0015] A testing method using the ultrasonic testing device for cantilevered end-face flange seals as described above includes the following steps: Before monitoring the in-service sealing rings of the flange, place the centering bracket unit according to the flange position, and fix the centering height support unit so that the rotation center of the rotary drive unit is located on the flange center axis. Based on the position of the sealing ring in the groove, adjust the cantilever adjustment unit to make the ultrasonic probe of the cantilever ultrasonic testing unit face the sealing ring, and make the water curtain adhere to the flange surface. Water is introduced into the pipe joint through the water pipe, so that the ultrasonic probe is completely immersed in it. It can remain stable when the water curtain does not touch the bolts on the flange, and can replenish water in time when the water curtain leaks due to collision with the bolts, so that the ultrasonic probe is always completely immersed in water. The rotary drive unit drives the detection position cantilever adjustment unit and the cantilever ultrasonic detection unit to rotate around the center of the flange under test, so that the ultrasonic probe can complete the monitoring of the entire in-service sealing ring at a given speed and collect monitoring data to obtain whether the in-service sealing ring has defects and, if so, the location of the defects. After monitoring is completed, pause the operation of the rotary drive unit, stop the flow of water into the water pipe, move the cantilever ultrasonic detection unit away from the flange surface, and end the monitoring task.

[0016] The beneficial effects of this invention are: This invention uses a centering height support unit to position the rotation center of the rotary drive unit on the flange's central axis. By adjusting the cantilever adjustment unit, the ultrasonic probe of the cantilever ultrasonic testing unit is aligned with the sealing ring, and the water curtain adheres to the flange surface. This water curtain effectively overcomes obstacles on the flange during rotation (such as flange bolts) for sealing ring detection. The rotary drive unit drives the cantilever adjustment unit and the cantilever ultrasonic testing unit to rotate around the center of the flange being tested. This allows the cantilever ultrasonic testing unit to probe the sealing ring within the flange along its path, overcoming the shortcomings of existing structures. It can successfully complete the full circumference detection of the in-service sealing ring in the end-face flange. This is particularly useful when the end-face flange is almost embedded in a plane, making it difficult to directly install an ultrasonic monitoring device on the flange. This invention is applicable to such situations and can be used with the flange placed vertically or horizontally. Even with obstructions on the flange surface, it can ensure continued detection in a localized water-immersion environment. Its structure is clear, each unit is simple, and it is easy for workers to install and use. The detection area is easy to adjust, requires fewer motors, has low cost, and can achieve automatic detection. It is also suitable for non-destructive testing of the surface of some other end face parts. During use, local water immersion can reduce corrosion of the surface of the test piece. By using soft sealing for the local water immersion environment, water consumption can be reduced. Attached Figure Description

[0017] Figure 1 This is a front view of the ultrasonic testing device for the cantilever end-face flange sealing ring in Embodiment 1 of the present invention.

[0018] Figure 2 This is a perspective view of the ultrasonic testing device for the cantilever end-face flange sealing ring in Embodiment 1 of the present invention.

[0019] Figure 3 This is a schematic diagram showing the connection between the rotary drive unit and the detection position cantilever adjustment unit in Embodiment 1 of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the cantilever ultrasonic detection unit in an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the operation of the ultrasonic testing device for the cantilever end-face flange sealing ring when the flange surface is placed horizontally in Embodiment 2 of the present invention.

[0022] Figure 6 This is a schematic diagram of the operation of the ultrasonic testing device for the cantilever end-face flange sealing ring when embedded in the ground large flange in Embodiment 3 of the present invention.

[0023] In the diagram: 1-Centering height support unit; 2-Rotary drive unit; 3-Detection position cantilever adjustment unit; 4-Cantilever ultrasonic detection unit; 5-Flange; 6-Support bend; 7-Upright pole; 8-Fastening knob a; 9-Upright pole positioning screw; 10-Counterweight base; 11-Flange connecting bolt; 12-Sealing ring; 13-Motor; 14-Drive base; 15-Connecting bolt a; 16-Drive disc; 17-Connecting bolt b; 18-Disc connecting rod; 19-Connecting rod a; 20-Connecting rod b ; 21-Connecting rod pin; 22-Monitoring unit mounting rod; 23-Detection radius holding rod; 24-Detection distance holding rod; 25-Fastening knob b; 26-Connecting bend; 27-Ultrasonic probe mounting plate; 28-Ultrasonic probe; 29-Set screw; 30-Tee adapter; 31-Hose clamp; 32-Water pipe; 33-Acrylic glass cover; 34-Silicone water curtain; 35-Centered support bend; 36-Height adjustment bend; 37-Height adjustment upright; 38-Radius adjustment bend; 39-Large flange. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0027] Example 1 An ultrasonic testing device for cantilevered end-face flange seals, such as Figures 1-4 As shown, it includes a centering height support unit 1, a rotary drive unit 2, a detection position cantilever adjustment unit 3, and a cantilever ultrasonic detection unit 4. The rotary drive unit 2 is mounted on the centering height support unit 1, the detection position cantilever adjustment unit 3 is mounted on the rotary drive unit 2, and the cantilever ultrasonic detection unit 4 is mounted on the detection position cantilever adjustment unit 3. The cantilever ultrasonic detection unit 4 is used to detect the sealing ring inside the flange. The cantilevered ultrasonic testing unit 4 includes an ultrasonic probe mounting plate 27, an ultrasonic probe 28, a water curtain, and a pipe connector. The pipe connector is connected and fixed to the ultrasonic probe mounting plate 27. The ultrasonic probe 28 is mounted on the ultrasonic probe mounting plate 27 and extends into the pipe connector. The ultrasonic probe 28 is arranged facing the water outlet at the lower end of the pipe connector. The water curtain is a ring-shaped water curtain that is fitted onto the water outlet at the lower end of the pipe connector. A water pipe is connected to one side of the pipe connector.

[0028] The centering height support unit 1 includes a support bend 6, a vertical pole 7, and a counterweight base 10. The lower end of the vertical pole 7 is connected to the counterweight base 10, and the lower end of the support bend 6 is sleeved with the upper end of the vertical pole 7, allowing it to move and extend along the vertical pole 7. The upper end of the support bend 6 is connected to the fixed end of the rotation drive unit 2.

[0029] Furthermore, such as Figure 2 As shown, a telescopic tube limit lock is provided between the upright 7 and the support tube. The lower end of the upright 7 is threadedly connected to the counterweight base 10 through the fastening knob a8. The counterweight base 10 is provided with an upright positioning screw 9. One end of the upright positioning screw 9 passes through the counterweight base 10 and is connected to the upright 7. The height of the upright relative to the counterweight base 10 in the vertical direction is finely adjusted by rotating the fastening knob a8. After adjustment, the fastening knob a8 is locked by rotating the upright positioning screw 9.

[0030] Furthermore, the telescopic tube limit lock is an internal lock. The upright and the support bend 6 can be moved and adjusted along the length of the upright. When the upright and the support bend 6 are adjusted to the corresponding position, the upright and the support bend 6 are rotated to a relative angle, thereby locking the relative position between the upright and the support bend 6 through the internal lock.

[0031] Example 2 like Figure 5 As shown, the structure and principle of Embodiment 2 are similar to those of Embodiment 1, except that the support bend 6 is replaced by a concentric support bend 35 and a height adjustment bend 36.

[0032] The upper end of the upright 7 is sleeved with the lower end of the height adjustment bend 36. A telescopic tube limit lock is provided between the upright and the height adjustment bend 36. The upper end of the height adjustment bend 36 is sleeved with one end of the centering support bend 35 through a locking sleeve. The other end of the centering support bend 35 is connected to the rotary drive unit 2.

[0033] Furthermore, the telescopic tube limiting lock is an internal lock (one of the upright 7 and the height adjusting bend 36 serves as the first rod tube, and the other serves as the second rod tube; the second rod tube is fitted inside the first rod tube, and the internal lock is located at the end of the second rod tube, inside the first rod tube). The upright and the height adjusting bend 36 can be moved and telescopically adjusted along the length of the upright. When the upright and the height adjusting bend 36 are adjusted to the corresponding position, the rotating upright and the height adjusting bend 36 are rotated to a relative angle, thereby locking the relative position between the upright and the height adjusting bend 36 through the internal lock.

[0034] Furthermore, after the locking sleeve is loosened by rotating it in the forward direction, the centering support bend 35 can be moved and extended relative to the height adjustment bend 36 for adjustment. Specifically, one of the centering support bend 35 and the height adjustment bend 36 serves as the first bend and the other as the second bend. The locking sleeve is connected to the first bend through a thread. Tightening the locking sleeve causes the end of the first bend to shrink. The second bend is locked by the locking sleeve, thereby fixing the position between the first bend and the second bend.

[0035] Example 3 like Figure 6 As shown, the structure and principle of Embodiment 2 are similar to those of Embodiment 1, except that the supporting bend is replaced by a height-adjustable upright, and the cantilevered end-face flange sealing ring ultrasonic testing device also includes two radius-adjustable bends.

[0036] It should be noted that the ultrasonic testing device for the cantilevered end-face flange sealing ring can simultaneously include a support bend 6, a centering support bend 35, a height adjustment bend 36, a height adjustment pole 37, and a radius adjustment bend 38. These can be selected and used according to the actual situation. The optional structure of Embodiment 1 can be used to test the flange surface when it is placed vertically, the optional structure of Embodiment 2 can be used to test the flange surface when it is placed horizontally, and the optional structure of Embodiment 3 can be used to test the oversized flange embedded in the ground.

[0037] The support bend 6 is replaced by a height-adjustable upright 37. The lower end of the height-adjustable upright 37 is sleeved with the upper end of the upright 7, and the upper end of the height-adjustable upright 37 is connected to the fixed end face of the rotary drive unit 2. Two radius-adjustable bends 38 are respectively the first radius-adjustable bend and the second radius-adjustable bend. One end of the first radius-adjustable bend is connected to the movable end face of the rotary drive unit 2, and the other end of the first radius-adjustable bend is sleeved with one end of the second radius-adjustable bend through a locking sleeve. The other end of the second radius-adjustable bend is connected to the disc connecting rod 18 of the detection position cantilever adjustment unit 3 via a flange connection. The height-adjustable upright 37... The height of the telescopically adjustable rotary drive unit 2 and the detection position cantilever adjustment unit 3 is adjusted radially by two radius adjustment bends 38. After the locking sleeve is loosened by rotating in the forward direction, the first radius adjustment bend can be moved and telescopically adjusted relative to the second radius adjustment bend. Specifically, one of the first radius adjustment bend and the second radius adjustment bend serves as the first bend and the other as the second bend. The locking sleeve is connected to the first bend by a thread. Tightening the locking sleeve causes the end of the first bend to shrink. The second bend is locked by the locking sleeve, thereby fixing the position between the first bend and the second bend.

[0038] Furthermore, a telescopic tube limit lock is provided between the upright 7 and the height-adjusting upright 37. The height-adjusting upright 37 can be moved and telescopically adjusted along the length of the upright. The telescopic tube limit lock is an internal lock (one of the upright 7 and the height-adjusting upright 37 serves as the first upright, and the other serves as the second upright. The second upright is fitted inside the first upright, and the internal lock is located at the end of the second upright, inside the first upright). When the adjusting upright and the height-adjusting upright 37 reach the corresponding position, the rotating upright and the height-adjusting upright 37 are rotated to a relative angle, thereby locking the relative position between the upright and the height-adjusting upright 37 through the internal lock.

[0039] Furthermore, the rotary drive unit 2 is an electric rotary table, the fixed end of which is connected to the centering height support unit 1, and the movable end of which is connected to the detection position cantilever adjustment unit 3.

[0040] Furthermore, the electric rotary table includes a motor 13, a drive base 14, and a drive disk 16. The motor 13 is fixed on the drive base, and the drive disk 16 is mounted on the drive base via a rotating shaft or bearing. The motor 13 is connected to the drive disk 16 via a worm gear assembly, and the motor 13 drives the drive disk 16 to rotate via the worm gear assembly.

[0041] The worm gear is connected to the output shaft of the motor, and the turbine gear is concentrically connected to the drive disk. The turbine gear meshes with the worm gear, and the worm gear drives the drive disk to rotate through the turbine gear.

[0042] Furthermore, the detection position cantilever adjustment unit 3 includes a disc connecting rod 18, a connecting rod a19, a connecting rod b20, a monitoring unit mounting rod 22, a detection radius holding rod 23, a detection distance holding rod 24, a fastening knob b25, and a connecting bend 26. One end of the disc connecting rod 18 is connected to the driving disc 16 of the rotary drive unit 2, and the other end of the disc connecting rod 18 is hinged to one end of the connecting rod a19. The other end of the connecting rod a19 is hinged to one end of the connecting rod b20, and the other end of the connecting rod b20 is hinged to the monitoring unit mounting rod 22 through a connecting rod pin 21. One end of the detection distance holding rod 24 is connected and fixed to the disc connecting rod 18 via a flange connection. The other end of the detection distance holding rod 24 is connected to the connecting bend 26. The connecting bend 26 is connected to the monitoring unit mounting rod 22 via the detection radius holding rod 23. The monitoring unit mounting rod 22 is used to connect and install the cantilever ultrasonic monitoring unit 4.

[0043] Furthermore, the detection distance holding rod 24 is a telescopic rod, which includes a first detection distance holding rod and a second detection distance holding rod. One end of the first detection distance holding rod is connected to the disc connecting rod 18, and the other end of the first detection distance holding rod is sleeved with the second detection distance holding rod through the fastening knob b25. After turning the fastening knob b25, the telescopic position between the first detection distance holding rod and the second detection distance holding rod can be adjusted. After turning the fastening knob b25 tightly, the position between the first detection distance holding rod and the second detection distance holding rod is locked.

[0044] Specifically, one of the first detection distance holding rod and the second detection distance holding rod serves as the first holding rod, and the other serves as the second holding rod. The fastening knob b is connected to the first holding rod through a thread. Tightening the fastening knob b causes the end of the first holding rod to retract, and the second holding rod is locked through the locking sleeve, thereby fixing the position between the first holding rod and the second holding rod.

[0045] Furthermore, the pipe fitting is a tee adapter 30. The upper end of the straight section of the tee adapter is connected and fixed to the ultrasonic probe mounting plate 27. The water curtain is fitted onto the lower end of the straight section of the tee adapter, and the water pipe is fitted onto the transverse branch pipe of the tee adapter and connected to the transverse branch pipe of the water pipe through the hose clamp 31.

[0046] Furthermore, the water curtain is connected to the pipe joint via a transparent cover.

[0047] Furthermore, the water curtain is a ring-shaped water curtain; the transparent cover is made of plexiglass, forming an plexiglass cover; and the water curtain itself is made of silicone, forming a silicone water curtain.

[0048] A testing method using the ultrasonic testing device for cantilevered end-face flange seals as described above includes the following steps: Step 1: Before monitoring the in-service sealing ring of the flange, place the centering support unit according to the flange position, and fix the centering height support unit 1 in a suitable position so that the rotation center of the rotary drive unit 2 is located on the flange center axis. Step 2: Based on the position of the sealing ring in the groove, adjust the four-bar mechanism of the cantilever adjustment unit 3 so that the ultrasonic probe of the cantilever ultrasonic testing unit 4 is facing the sealing ring, and make the silicone water curtain adhere to the flange surface. Tighten the fastening knob to fix the detection distance holding rod and the detection radius holding rod 23 to lock the four-bar mechanism. Finally, adjust the distance between the probe and the flange surface and fix its position with the set screw. Step 3: Water is introduced into the pipe joint through the water pipe so that the ultrasonic probe is completely immersed in it. This ensures stability when the water curtain does not touch the bolts on the flange and allows for timely replenishment of water if the water curtain leaks due to collision with the bolts, ensuring that the ultrasonic probe is always completely submerged in water. Step 4: The rotary drive unit 2 drives the detection position cantilever adjustment unit 3 and the cantilever ultrasonic monitoring unit 4 to rotate around the center of the flange under test, so that the ultrasonic probe completes the monitoring of the entire in-service sealing ring at a given speed and collects monitoring data to obtain whether the in-service sealing ring has defects and, if the sealing ring has defects, the location of the defects. Step 5: After monitoring is completed, pause the operation of the rotary drive unit 2, stop the flow of water into the water pipe, move the cantilever ultrasonic monitoring unit 4 away from the flange surface, and end the monitoring task.

[0049] Working principle of the invention: The present invention proposes an ultrasonic testing device for cantilever end-face flange sealing rings, such as... Figure 1 As shown, it mainly consists of a centering height support unit 1, a rotation drive unit 2, a detection position cantilever adjustment unit 3, and a cantilever ultrasonic detection unit 4; as Figure 2 As shown, the concentric height support unit consists of a support bend 6, a vertical pole 7, a fastening knob a8, a vertical pole positioning screw 9, and a counterweight base 10; as Figure 3 As shown, the rotary drive unit 2 mainly consists of a motor 13, a drive base 14, and a drive disc 16, connected by connecting bolt a15. The detection position cantilever adjustment unit 3 consists of a disc connecting rod 18, connecting rod a19, connecting rod b20, a monitoring unit mounting rod 22, a detection radius holding rod 23, a detection distance holding rod 24, a fastening knob b25, and a connecting bend 26, connected by connecting bolt a15 and connecting rod pin 21. Figure 4 As shown, the cantilevered ultrasonic testing unit 4 mainly consists of an ultrasonic probe mounting plate 27, an ultrasonic probe 28, a set screw 29, a three-way adapter 30, a hose clamp 31, a water pipe 32, an acrylic cover 33, and a silicone water curtain 34.

[0050] Based on the position of flange 5, place and fix the counterweight base 10, install the upright 7, tighten the upright positioning screw 9, install the support bend 6 in sequence, connect the rotary drive unit 2 and the detection position cantilever adjustment unit 3, and adjust so that the drive disc 16 and flange 5 are coaxial and aligned with their centers. Tighten the fixing knob a8 to fix the position of the rotary drive unit 2, complete the alignment work, and make the rotation axis of the drive disc collinear with the axis of the flange being measured; manually move the monitoring unit mounting rod so that the ultrasonic probe 28 is facing the sealing ring 12, and make the silicone water curtain 34 adhere to the surface of flange 5.

[0051] The T-connector 30 has a water inlet. Water is filled between the ultrasonic probe 28 and the flange 5 as a coupling agent, completely immersing the ultrasonic probe 28 and expelling air from the cavity of the T-connector 30. The water outlet at the lower end of the T-connector 30 is equipped with an plexiglass cover 33 and a silicone water curtain 34. The silicone water curtain 34 is in close contact with the surface of the flange 5, providing a soft seal for the water in the cavity of the T-connector 30, thereby creating a relatively stable local water immersion environment for the ultrasonic probe 28.

[0052] In Example 1, this invention proposes a cantilevered end-face flange sealing ring ultrasonic testing device. The testing method is as follows: First, before monitoring the in-service sealing ring, according to the position of the flange 5, place and fix the counterweight base 10, install the upright 7, tighten the upright positioning screws 9, install the support bend 6, connect the rotary drive unit 2 and the detection position cantilever adjustment unit 3, and adjust so that the drive disc 16 is coaxial with the flange 5, making the annular monitoring area surface parallel to the end face of the large flange 39. Tighten the fixing knob a8 to fix the position of the rotary drive unit, completing the alignment work, so that the rotation axis of the testing device is collinear with the flange axis. Second, according to the sealing ring 12 in the groove position, manually move the monitoring unit mounting rod so that the ultrasonic probe 28 is directly facing the sealing ring 12, and the silicone water curtain 34 adheres to the surface of the flange 5. Tighten the fixing knob b25 to fix the detection radius holding rod 23 and the detection distance. After removing the retaining rod 24, adjust the distance between the ultrasonic probe 28 and the flange 5 surface and fix its position with the set screw 29; in the third step, use a water pump to create a relatively stable local water immersion environment through the water pipe 32 and the tee adapter 30, so that the ultrasonic probe 28 is completely immersed in it. Adjust the water pump pressure to maintain stability when the silicone water curtain 34 does not touch the bolt 11, and to replenish water in time when the silicone water curtain 34 leaks due to collision with the bolt 11, so that the ultrasonic probe 28 is always completely immersed in water; in the fourth step, set an appropriate motor speed according to the monitoring requirements, so that the ultrasonic probe completes the monitoring of the entire in-service sealing ring 12 at the given speed and collects monitoring data to obtain the defect location of the in-service sealing ring 12; finally, after the monitoring is completed, stop the motor 13 and the water pump respectively, loosen the fastening knob b, move the cantilever ultrasonic monitoring unit 4 away from the flange 5 surface, and end the monitoring task.

[0053] In Example 2, the present invention proposes an ultrasonic testing device for a cantilevered end-face flange sealing ring. When the end face of the flange 5 is placed horizontally in space, such as... Figure 5 As shown, the first step of adjusting the above detection method is as follows: Before monitoring the in-service sealing ring, according to the position of the flange 5, place and fix the counterweight base 10, install the upright 7, tighten the upright positioning screw 9, install the height adjustment bend 36 and the centering support bend 35, connect the rotary drive unit 2 and the detection position cantilever adjustment unit 3, and adjust the centering support bend 35 so that the drive disc 16 is coaxial with the flange 5, so that the annular monitoring area surface is parallel to the end face of the flange 5, tighten the locking sleeve on the centering support bend 35 to complete the centering work, so that the rotation axis of the detection device is collinear with the flange axis, and then adjust the height adjustment bend 36 to initially adjust the distance from the cantilever ultrasonic monitoring unit 4 to the flange end face, and tighten the fastening knob a8 on the upright 7 to fix the position of the rotary drive unit 2; the subsequent steps are the same as above.

[0054] In Example 3, this invention proposes an ultrasonic testing device for cantilevered end-face flange seals. When the flange is embedded in the ground and its diameter is too large, such as... Figure 6 As shown, the first step of adjusting the above-mentioned detection method is as follows: Before testing the in-service sealing ring, according to the position of the large flange 39, place the counterweight base 10 on the center of the end face of the large flange 39, install the upright 7 and place it on the axis of the large flange 39, tighten the upright positioning screw 9, install the height adjustment upright 37, change the installation position of the rotary drive unit 2 and install it on the height adjustment upright 37. At this time, the rotation axis of the drive unit is collinear with the large flange 39, so that the annular detection area surface is parallel to the end face of the large flange 39. Connect the radius adjustment bend 38 and the detection position cantilever adjustment unit 3, and initially adjust the distance between the detection position cantilever adjustment unit 3 and the end face by adjusting the height adjustment upright 37 and tighten the fastening knob a8. Then adjust the radius adjustment bend 38 to initially adjust the cantilever ultrasonic detection unit 4 so that the position of the sealing ring is in the annular detection area. Tighten the locking sleeve on the drive unit bend to fix the position of the detection position cantilever adjustment unit 3. The subsequent steps are the same as above.

[0055] This invention proposes a cantilevered end-face flange sealing ring ultrasonic testing device, which is also applicable to some workpiece planes (which can be slightly uneven surfaces) that require large-area ultrasonic non-destructive testing. Each rotation of the rotary drive unit 2 completes one annular narrow-band testing area for the cantilevered ultrasonic testing unit 4. By adjusting the rod related to the rotation radius of the cantilever adjustment unit or the cantilever adjustment unit 3 at regular intervals, a new annular narrow-band testing area can be obtained. By repeating this operation, multiple annular narrow-band areas can be combined to form a large annular testing area. As long as this testing area completely covers the workpiece plane, it is applicable.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An ultrasonic testing device for cantilever end-face flange sealing rings, characterized in that: It includes a centering height support unit (1), a rotary drive unit (2), a detection position cantilever adjustment unit (3), and a cantilever ultrasonic detection unit (4). The rotary drive unit (2) is mounted on the centering height support unit (1), the detection position cantilever adjustment unit (3) is mounted on the rotary drive unit (2), and the cantilever ultrasonic detection unit (4) is mounted on the detection position cantilever adjustment unit (3). The cantilever ultrasonic detection unit (4) is used to detect the sealing ring inside the flange. The cantilever ultrasonic testing unit (4) includes an ultrasonic probe mounting plate (27), an ultrasonic probe (28), a water curtain, and a pipe connector. The pipe connector is connected and fixed to the ultrasonic probe mounting plate (27). The ultrasonic probe (28) is mounted on the ultrasonic probe mounting plate (27) and extends into the pipe connector. The ultrasonic probe (28) is arranged facing the water outlet at the lower end of the pipe connector. The water curtain is fitted onto the water outlet at the lower end of the pipe connector. A water pipe is connected to one side of the pipe connector.

2. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 1, characterized in that: The centering height support unit (1) includes a support bend (6), a vertical pole (7) and a counterweight base (10). The lower end of the vertical pole (7) is connected to the counterweight base (10), the lower end of the support bend (6) is sleeved with the upper end of the vertical pole (7), and can move and extend along the vertical pole (7). The upper end of the support bend (6) is connected to the rotation drive unit (2).

3. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 2, characterized in that: A telescopic tube limit lock is provided between the upright (7) and the support tube. The lower end of the upright (7) is threadedly connected to the counterweight base (10) through the fastening knob a (8). The counterweight base (10) is provided with an upright positioning screw (9). One end of the upright positioning screw (9) passes through the counterweight base (10) and is connected to the upright (7).

4. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 2, characterized in that: The ultrasonic testing device for the cantilever end face flange sealing ring also includes a concentric support bend (35) and a height adjustment bend (36). The support bend (6) is replaced by the concentric support bend (35) and the height adjustment bend (36). The upper end of the upright (7) is sleeved with the lower end of the height adjustment bend (36). The upper end of the height adjustment bend (36) is sleeved with one end of the concentric support bend (35) through a locking sleeve. The other end of the concentric support bend (35) is connected to the rotary drive unit (2).

5. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 2, characterized in that: The ultrasonic testing device for the cantilever end-face flange sealing ring also includes a height adjustment rod (37) and two radius adjustment bends (38). The support bend (6) is replaced by the height adjustment rod (37). The lower end of the height adjustment rod (37) is sleeved with the upper end of the rod (7). The upper end of the height adjustment rod (37) is connected to the fixed end face of the rotary drive unit (2). The two radius adjustment bends (38) are the first radius adjustment bend and the second radius adjustment bend, respectively. One end of the first radius adjustment bend is connected to the movable end face of the rotary drive unit (2). The other end of the first radius adjustment bend is sleeved with one end of the second radius adjustment bend through a locking sleeve. The other end of the second radius adjustment bend is connected to the detection position cantilever adjustment unit (3).

6. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 1, characterized in that: The rotary drive unit (2) is an electric rotary table. The fixed end of the electric rotary table is connected to the centering height support unit (1), and the movable end of the electric rotary table is connected to the detection position cantilever adjustment unit (3).

7. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 1, characterized in that: The detection position cantilever adjustment unit (3) includes a disc connecting rod (18), a connecting rod a (19), a connecting rod b (20), a detection unit mounting rod (22), a detection radius holding rod (23), a detection distance holding rod (24), a fastening knob b (25), and a connecting bend (26). One end of the disc connecting rod (18) is connected to the rotary drive unit (2), and the other end of the disc connecting rod (18) is hinged to one end of the connecting rod a (19). The other end of the connecting rod a (19) is hinged to one end of the connecting rod b (20), and the other end of the connecting rod b (20) is hinged to the detection unit mounting rod (22). One end of the detection distance holding rod (24) is connected and fixed to the disc connecting rod (18), and the other end of the detection distance holding rod (24) is connected to the connecting bend (26). The connecting bend (26) is connected to the detection unit mounting rod (22) through the detection radius holding rod (23). The detection unit mounting rod (22) is used to connect and install the cantilever ultrasonic detection unit (4).

8. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 1, characterized in that: The pipe fitting is a three-way adapter (30). The upper end of the straight section of the three-way adapter is connected and fixed to the ultrasonic probe mounting plate (27). The water curtain is fitted onto the lower end of the straight section of the three-way adapter, and the water pipe is fitted onto the horizontal branch pipe of the three-way adapter.

9. The ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 1, characterized in that: The water curtain is connected to the pipe joint through a transparent cover.

10. A testing method using the ultrasonic testing device for cantilever end-face flange sealing rings as described in claim 1, characterized in that: Includes the following steps: Before inspecting the in-service sealing ring of the flange, place the centering bracket unit according to the flange position, and fix the centering height support unit (1) so that the rotation center of the rotary drive unit (2) is located on the flange center axis. According to the position of the sealing ring in the groove, adjust the detection position cantilever adjustment unit (3) so that the ultrasonic probe of the cantilever ultrasonic detection unit (4) is facing the sealing ring and the water curtain is attached to the flange surface. Water is introduced into the pipe joint through the water pipe, so that the ultrasonic probe is completely immersed in it. It can remain stable when the water curtain does not touch the bolts on the flange, and can replenish water in time when the water curtain leaks due to collision with the bolts, so that the ultrasonic probe is always completely immersed in water. The rotating drive unit (2) drives the detection position cantilever adjustment unit (3) and the cantilever ultrasonic detection unit (4) to rotate around the center of the flange under test, so that the ultrasonic probe completes the detection of the entire in-service sealing ring at a given speed and collects monitoring data, thereby obtaining whether the in-service sealing ring has defects and, if so, the location of the defects. After the test is completed, pause the operation of the rotary drive unit (2), stop the water flow into the water pipe, move the cantilever ultrasonic testing unit (4) away from the flange surface, and end the test task.

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