Ultrasonic detection device and method for fillet weld of connecting pipe seat of boiler pipeline

Abstract

The invention provides an ultrasonic detection device and method for a fillet weld of a boiler pipeline connecting pipe seat, and relates to the technical field of ultrasonic detection of the fillet weld of the boiler pipeline connecting pipe seat, the ultrasonic detection device comprises a detection part used for detecting the fillet weld of the boiler pipeline connecting pipe seat, and the detection part is composed of magnetic powder equipment and ultrasonic detection equipment; the exterior of the magnetic powder equipment is fixedly communicated with a conveying pipe, and the other end of the conveying pipe is fixedly communicated with a spray head for spraying; a moving mechanism is arranged outside the detection part, and a linkage structure which is in linkage fit with the linkage gear ring and used for adjusting the spraying amount of the magnetic powder equipment is installed outside the magnetic powder equipment. According to the boiler pipeline connecting pipe seat fillet weld ultrasonic detection device and method, the subsequent repair and replacement cost caused by missing detection or misjudgment can be reduced through combined use of magnetic powder detection and ultrasonic detection, and meanwhile, due to complementarity of the two detection methods, the detection frequency and the working time can be reduced to a certain extent, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic detection of fillet welds of a pipe connection socket of a boiler pipeline, and in particular to an ultrasonic detection device and method for fillet welds of a pipe connection socket of a boiler pipeline. Background Art

[0002] At present, the ultrasonic detection method of the fillet weld of the boiler pipe socket is complicated. The oblique probe must be placed on both the boiler pipe and the pipe. In addition, since the conventional oblique probe is small, it is easy to miss the detection when the traditional method of directly holding the oblique probe by hand is used to detect the whole circumference of the fillet weld of the pipe socket with a small size.

[0003] The Chinese patent announcement number is: CN112858478A. A boiler pipe pipe socket corner weld ultrasonic detection device includes a corner weld, an oblique probe, a cable and an ultrasonic detector; the oblique probe includes a chip and a sound-transmitting wedge, the chip is embedded in the sound-transmitting wedge, the chip is tilted, the sound-transmitting wedge matches the outer wall of the boiler pipe to be tested, the pipe is fixed on the outer wall of the boiler pipe to be tested through the corner weld, the ultrasonic detector is connected to the chip, the sound beam generated by the chip passes through the sound-transmitting wedge and then refracts to reach the boiler pipe to be tested, and then is detected on the corner weld after reflection, and then the ultrasonic signal representing the internal quality of the corner weld is received by the ultrasonic detector via the cable. The device can perform ultrasonic detection on the corner weld of the boiler pipe socket.

[0004] The above patent has the following deficiencies: The application uses ultrasonic testing equipment to detect the fillet weld of the boiler pipe socket, but the ultrasonic testing equipment has certain limitations, such as ultrasonic propagation delay: In some materials, the propagation speed of ultrasonic waves may be slower than expected, resulting in longer detection time. This may be due to defects or impurities inside the material; abnormal echo reception: When ultrasonic waves propagate in the material, if there are too many reflections or refractions, it may cause abnormal echo reception, causing serious signal attenuation, thereby affecting the accuracy of the detection results; signal interference: electromagnetic interference in the surrounding environment may affect the signal reception of ultrasonic flaw detection, thereby affecting the accuracy of the detection results, and even causing detection failure.

[0005] To this end, the present invention provides an ultrasonic detection device and method for the fillet weld of a boiler pipe connection socket to improve the detection accuracy. Summary of the invention

[0006] The present invention provides a boiler pipeline taking-over socket corner weld ultrasonic detection device and method, which has the advantages of significantly improving the comprehensiveness and accuracy of detection, reducing detection costs and time costs, providing a strong guarantee for the safe operation of the boiler, and solving the problem that ultrasonic detection equipment has certain limitations.

[0007] In order to solve the above technical problems, the present invention discloses an ultrasonic detection device for fillet welds of boiler pipe pipe sockets, comprising a detection unit for detecting fillet welds of boiler pipe pipe sockets, the detection unit is composed of a magnetic powder device and an ultrasonic detection device, the outside of the magnetic powder device is fixedly connected to a delivery pipe, and the other end of the delivery pipe is fixedly connected to a nozzle for spraying;

[0008] The detection part is provided with a moving mechanism on the outside, and the moving mechanism includes a pipe sleeve for installation on the pipeline, a driving motor arranged above the pipe sleeve, a transmission gear fixedly installed on the output shaft of the driving motor, a moving gear rotatably arranged at one end of the pipe sleeve, and a linkage gear ring fixedly installed on the outer surface of the other end of the pipe sleeve, and a mounting platform for fixing the magnetic powder device is fixedly installed on the outside of the moving gear;

[0009] The outside of the magnetic powder equipment is installed with a linkage structure that cooperates with a linkage gear ring to adjust the spraying amount of the magnetic powder equipment. The linkage structure consists of a shell, a rotating disk rotatably arranged in the shell, a mounting arm welded to the outside of the rotating disk, a roller rotatably mounted on the other end of the mounting arm, a connecting shaft fixedly mounted on the outside of the rotating disk and extending to the outside of the shell, and a linkage gear fixedly mounted on the other end of the connecting shaft and meshing with the linkage gear ring.

[0010] Furthermore, the ultrasonic detection device is fixedly mounted on the upper surface of the shell, and the outside of the ultrasonic detection device is fixedly connected with a wire connected to the ultrasonic detector.

[0011] Furthermore, the shell is fixedly installed on one side of the magnetic powder equipment, and a one-way valve is provided at one end of the conveying pipe connected to the magnetic powder equipment.

[0012] Furthermore, an L-shaped mounting plate is fixedly mounted on the end of the pipe sleeve, and a motor seat for fixing the driving motor is fixedly mounted on the inner top wall of the mounting plate.

[0013] Furthermore, a connecting ring is welded on one side of the pipe sleeve close to the mounting plate, a limit block for limiting the movable gear is fixedly mounted on the outer surface of the connecting ring, a sliding groove matching the limit block is opened on the inner side of the movable gear, and the movable gear is mounted on the connecting ring through the sliding fit between the limit block and the sliding groove.

[0014] Furthermore, a circular volume cavity is provided in the shell, two through holes communicating with the volume cavity are provided inside the shell, and the delivery pipe is installed around the volume cavity, and both ends of the delivery pipe penetrate the shell through the through holes;

[0015] The two perforations are arranged up and down, the number of the mounting arms and the number of the rollers are both three, the three mounting arms are equidistantly mounted on the outside of the rotating disk, and the three rollers are intermittently abutted against the conveying pipe;

[0016] The connecting shaft extends into the volume cavity, and the connecting shaft is connected to the interior of the housing through a bearing.

[0017] Furthermore, a fixed structure is installed on the inner side of the pipe sleeve, and the fixed structure includes a telescopic electric cylinder fixedly installed on the inner top wall of the pipe sleeve and a clamp fixedly installed on the output end of the telescopic electric cylinder. The clamp has an arc shape so as to better abut against the outer surface of the pipe.

[0018] Another technical problem to be solved by the present invention is to provide a method for ultrasonically detecting fillet welds of a boiler pipe connection socket, comprising the following steps:

[0019] Step 1: Before testing, put the pipe sleeve on the outer surface of the pipe and place the testing part close to the fillet weld of the pipe joint of the boiler pipe, and then fix it by moving the telescopic electric cylinder and the fixture; use ultrasonic detection equipment to perform preliminary testing on the fillet weld of the pipe joint of the boiler pipe. The ultrasonic wave generates a diffraction energy signal when it encounters a metal defect during propagation. The size and depth of the defect are determined based on the spatial difference of the diffraction wave signal. Then, magnetic powder is sprayed on the fillet weld of the pipe joint of the boiler pipe through the magnetic powder equipment and the nozzle. The magnetic traces formed by the magnetic powder gathering at the defect are used to display the position and shape of the defect, which can intuitively display the morphology and size of the defect.

[0020] Step 2: When the fillet weld of the boiler pipe socket is large, the driving motor and the transmission gear are used to drive the mobile gear to rotate in a circle around the pipe sleeve to increase the spraying range of the magnetic powder equipment. At the same time, the three rollers are rotated in the volume chamber and intermittently contacted with the conveying pipe by the transmission cooperation of the linkage gear and the linkage gear ring to realize the conveying of magnetic powder.

[0021] Compared with the prior art, the present invention provides a device and method for ultrasonic detection of fillet welds of boiler pipe connection sockets, which has the following beneficial effects:

[0022] 1. The ultrasonic testing device and method for the fillet weld of the boiler pipe socket can not only improve the comprehensiveness of the detection, but also improve the detection accuracy. The ultrasonic flaw detection and magnetic particle flaw detection have their own advantages, and are respectively suitable for detecting the internal and surface defects of the weld. The combination of the two can realize the comprehensive detection of the weld, ensure that no potential defects are missed, and improve the detection accuracy. Although the ultrasonic flaw detection can detect the defects inside the weld, it may be affected by factors such as material organization and sound velocity changes, resulting in certain errors in the detection results. The magnetic particle flaw detection can intuitively display the morphology and size of the surface defects, providing a powerful supplement and verification for the ultrasonic flaw detection, and can reduce the detection cost. The combined use can reduce the subsequent repair and replacement costs caused by missed detection or misjudgment. At the same time, due to the complementarity of the two detection methods, the number of detections and working time can be reduced to a certain extent, and the detection efficiency can be improved.

[0023] 2. The ultrasonic detection device and method for the fillet weld of the pipe socket of the boiler pipeline, through the driving of the driving motor and the transmission gear, makes the moving gear rotate around the pipe sleeve in a circle, thereby improving the spraying range of the magnetic powder equipment. At the same time, the transmission cooperation of the linkage gear and the linkage gear ring is used to make the three rollers rotate in the volume cavity and intermittently contact with the conveying pipe. When the rollers begin to contact and squeeze the conveying pipe, the conveying pipe is compressed and closed, thereby preventing the magnetic powder from flowing back in the conveying pipe. As the rollers continue to move or roll, the magnetic powder in the closed conveying pipe is squeezed to form a peristaltic wave, which pushes the magnetic powder to flow forward. When the rollers are removed and the conveying pipe is restored to its original state, due to the pressure change in the conveying pipe, negative pressure will be formed around the conveying pipe, thereby sucking in new magnetic powder. This process is repeated continuously to realize the continuous conveying of magnetic powder. Without introducing a new driving source, it is possible to realize the improvement of the detection range and the ability to perform detection at the same time, which greatly improves the applicability of the equipment, effectively reduces the production cost, and improves the linkage between structures.

[0024] In addition, the faster the driving motor rotates, the faster the spraying speed of the magnetic powder equipment is, and it can be used according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a stereoscopic diagram of the overall structure of an ultrasonic detection device and method for fillet welds of a boiler pipe connection socket of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a detection part in an ultrasonic detection device and method for fillet welds of a boiler pipe connection socket of the present invention;

[0028] Figure 3 It is a partial structural schematic diagram of a moving mechanism in an ultrasonic detection device and method for fillet welds of a boiler pipe connection socket of the present invention;

[0029] Figure 4 It is a structural schematic diagram of a limit block in an ultrasonic detection device and method for fillet welds of a boiler pipe connection socket of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the linkage structure in an ultrasonic detection device and method for fillet welds of a boiler pipe connection socket of the present invention;

[0031] Figure 6The present invention is a schematic diagram of the structure inside the magnetic powder equipment in an ultrasonic detection device and method for fillet welds of a boiler pipe connection socket of the present invention.

[0032] In the figure: 1. detection unit; 101. magnetic powder equipment; 102. ultrasonic detection equipment; 1021. wire; 103. delivery pipe; 104. nozzle; 105. one-way valve; 2. moving mechanism; 201. pipe sleeve; 202. mounting plate; 203. motor seat; 204. driving motor; 205. transmission gear; 206. moving gear; 207. linkage gear ring; 208. connecting ring; 209. limit block; 3. linkage structure; 301. shell; 302. volume chamber; 303. rotating Moving plate; 304, mounting arm; 305, roller; 306, connecting shaft; 307, linkage gear; 4, mounting table; 5, telescopic electric cylinder; 6, clamp; 7, magnetic powder box; 8, driving motor; 9, cavity 1; 10, turntable; 11, crushing roller; 12, connecting channel; 13, belt assembly; 14, magnetic powder placement cavity; 15, connecting rod; 16, sliding rod; 17, sliding block; 18, short rod; 19, support rod; 20, absorption pump; 21, suction nozzle; 22, reset spring; 23, connecting pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention provides the following embodiments

[0036] Example 1

[0037] The embodiment of the present invention provides a drying device for preparing diamond group abrasives, please refer to Figures 1 to 5 , a boiler pipe connection socket corner weld ultrasonic detection device, comprising a detection unit 1 for detecting boiler pipe connection socket corner welds, the detection unit 1 is composed of a magnetic powder device 101 and an ultrasonic detection device 102, the outside of the ultrasonic detection device 102 is fixedly connected with a wire 1021 connected to an ultrasonic detector. A one-way valve 105 is provided at one end of a delivery pipe 103 connected to the magnetic powder device 101. Among them, the outside of the magnetic powder device 101 is fixedly connected with a delivery pipe 103, and the other end of the delivery pipe 103 is fixedly connected with a spraying nozzle 104 for spraying. In order to increase the spraying range of the spraying nozzle 104, in this embodiment, Figure 1 As shown, a moving mechanism 2 is arranged outside the detection part 1, and the moving mechanism 2 includes a sleeve 201 for installation on the pipeline, a driving motor 204 arranged above the sleeve 201, a transmission gear 205 fixedly installed on the output shaft of the driving motor 204, a moving gear 206 rotatably arranged at one end of the sleeve 201, and a linkage gear ring 207 fixedly installed on the outer surface of the other end of the sleeve 201, and a mounting table 4 fixed with the magnetic powder equipment 101 is fixedly installed outside the moving gear 206.

[0038] Specifically, an L-shaped mounting plate 202 is fixedly mounted on the end of the pipe sleeve 201 , and a motor seat 203 for fixing the driving motor 204 is fixedly mounted on the inner top wall of the mounting plate 202 .

[0039] In order to limit the position of the moving gear 206, in this embodiment, as shown in FIG. Figure 3 and Figure 4 As shown, a connecting ring 208 is welded on one side of the pipe sleeve 201 close to the mounting plate 202, and a limit block 209 for limiting the moving gear 206 is fixedly mounted on the outer surface of the connecting ring 208. A sliding groove matching the limit block 209 is provided on the inner side of the moving gear 206, and the moving gear 206 is installed on the connecting ring 208 through the sliding cooperation between the limit block 209 and the sliding groove.

[0040] The shape of the moving gear 206 is two-thirds of a circle, and its bottom is open. The limit block 209 is slidably matched with the slide groove to limit the guide, thereby achieving the advantage of stable rotation. The length of the slide groove is shorter than the moving distance of the moving gear 206, so as to prevent the moving gear 206 from being out of engagement with the transmission gear 205.

[0041] In order to use the magnetic powder device 101 in conjunction with the moving mechanism 2, in this embodiment, Figure 1 , Figure 3-Figure 5As shown, a linkage structure 3 is installed on the outside of the magnetic powder equipment 101 to cooperate with the linkage gear ring 207 for adjusting the spraying amount of the magnetic powder equipment 101. The linkage structure 3 consists of a shell 301, a rotating disk 303 rotatably arranged in the shell 301, a mounting arm 304 welded to the outside of the rotating disk 303, a roller 305 rotatably mounted on the other end of the mounting arm 304, a connecting shaft 306 fixedly mounted on the outside of the rotating disk 303 and extending to the outside of the shell 301, and a linkage gear 307 fixedly mounted on the other end of the connecting shaft 306 and meshing with the linkage gear ring 207.

[0042] Specifically, the ultrasonic detection device 102 is fixedly installed on the upper surface of the shell 301, the shell 301 is fixedly installed on one side of the magnetic powder device 101, a circular volume cavity 302 is opened in the shell 301, two through holes connected to the volume cavity 302 are opened inside the shell 301, and the delivery pipe 103 is installed around the volume cavity 302, and its two ends pass through the shell 301 through the through holes.

[0043] When the present embodiment is used, the pipe sleeve 201 is sleeved on the outer surface of the pipe and the detection part 1 is placed close to the fillet weld of the pipe connection seat of the boiler pipe, and then fixed by the movement cooperation of the telescopic electric cylinder 5 and the clamp 6; the detection is carried out by the ultrasonic detection device 102, and the fillet weld of the pipe connection seat of the boiler pipe is preliminarily detected by the ultrasonic detection device 102, and then the moving gear 206 is driven by the driving motor 204 and the transmission gear 205 to rotate in a circle around the pipe sleeve 201, so as to increase the spraying range of the magnetic powder device 101, and at the same time, the transmission cooperation of the linkage gear 307 and the linkage gear ring 207 is used to make the three rollers 305 rotate in the volume chamber 302 and intermittently contact with the conveying pipe 103, so as to realize the conveying of magnetic powder, and the magnetic powder is sprayed on the fillet weld of the pipe connection seat of the boiler pipe through the nozzle 104, and the magnetic traces formed by the magnetic powder gathering at the defect are used to display the position and shape of the defect, so as to intuitively display the morphology and size of the defect.

[0044] It should be noted that the two through holes are arranged up and down, the number of the mounting arms 304 and the number of the rollers 305 are both three, the three mounting arms 304 are equidistantly mounted on the outside of the rotating disk 303, and the three rollers 305 are intermittently abutted against the conveying pipe 103. The connecting shaft 306 extends into the volume chamber 302, and the connecting shaft 306 is connected to the inside of the housing 301 through a bearing. A feed pipe and a discharge pipe are installed on the magnetic powder device 101, and sealing blocks are threadedly installed at the ends of the feed pipe and the discharge pipe.

[0045] In this embodiment, Figure 1As shown, a fixing structure is installed on the inner side of the pipe sleeve 201, and the fixing structure includes a telescopic electric cylinder 5 fixedly installed on the inner top wall of the pipe sleeve 201 and a clamp 6 fixedly installed on the output end of the telescopic electric cylinder 5. The outer shape of the clamp 6 is an arc shape so as to better abut against the outer surface of the pipe. A plurality of suction cups arranged at equal distances are installed on the lower surface of the clamp 6 to further fix the pipe sleeve 201.

[0046] In this embodiment, Figure 1 As shown, the magnetic powder equipment 101 includes: a magnetic powder box 7, the magnetic powder box 7 is connected to the shell 301, the driving motor 8 is fixedly installed on the inner wall of a cavity 9 provided inside the magnetic powder box 7, and the output end of the driving motor 8 is fixedly connected to the turntable 10, and the turntable 10 is connected to the crushing roller 11 through a belt assembly 13, and the front and rear ends of the crushing roller 11 are rotatably connected to the inner wall of the connecting channel 12, and the top end of the connecting channel 12 is used to place magnetic powder, the bottom end of the connecting channel 12 is connected to the magnetic powder placement cavity 14, and the turntable 10 is connected to the magnetic powder conveying assembly through a connecting rod 15.

[0047] Specifically, the magnetic powder conveying assembly includes: a slide rod 16, the left and right ends of the slide rod 16 are fixedly installed on the inner wall of the magnetic powder placement chamber 14, and two groups of sliders 17 are slidably connected to the slide rod 16, the bottom ends of the two groups of sliders 17 are connected to the support rod 19 through a short rod 18, the short rod 18 at the left end is movably connected to the turntable 10 through a connecting rod 15, an absorption pump 20 is fixedly installed on the support rod 19, and the input end of the support rod 19 is connected to a connecting pipe 23, and the bottom end of the connecting pipe 23 is connected to a plurality of suction nozzles 21, the output end of the absorption pump 20 is connected to the conveying pipe 103, one end of a plurality of reset springs 22 is fixedly installed on the inner wall of the right end of the magnetic powder placement chamber 14, and the other end of the reset spring 22 is fixedly installed on the short rod 18.

[0048] The working principle of the above technical solution is: when the magnetic powder equipment 101 needs to be used, first start the driving motor 8, the driving motor 8 rotates to drive the turntable 10 fixedly connected to it to rotate, the rotation of the turntable 10 drives the crushing roller 11 connected to its belt to rotate, the rotation of the crushing roller 11 drives the magnetic powder put in from the connecting channel 12 to be destroyed, and the magnetic powder will enter the bottom end of the magnetic powder placement chamber 14 from the connecting channel 12, and then the turntable 10 rotates to drive the connecting rod 15 movably connected to it to drive the short rod 18 to move left and right, further making the slider 17 move left and right on the slide rod 16, and at the same time drive the absorption pump 20 fixedly installed on the support rod 19 to move left and right, and further drive the connecting pipe 23 and several suction nozzles 21 connected to the absorption pump 20 to move left and right, so that the magnetic powder at the bottom end of the magnetic powder placement chamber 14 is transported through the connecting pipe 23 and the conveying pipe 103.

[0049] The beneficial effects of the above technical solution are as follows: by setting the crushing roller 11, it is helpful to crush the magnetic powder block through the crushing roller 11, so that it can enter the magnetic powder placement chamber 14; by setting the turntable 10 and the connecting rod 15, it is helpful to automatically control the left and right movement of the short rod 18, so as to absorb all the magnetic powder on the left and right sides of the bottom end of the magnetic powder placement chamber 14; by setting the sliding rod 16 and the sliding block 17, it is helpful to control the left and right movement of the absorption pump 20; by setting a plurality of reset springs 22, it is helpful to realize the resetting of the short rod 18; by setting a plurality of suction nozzles 21, it is helpful to realize the absorption of magnetic powder.

[0050] Another technical problem to be solved by the present invention is to provide a method for ultrasonically detecting fillet welds of a boiler pipe connection socket, comprising the following steps:

[0051] Step 1: Before the inspection, the pipe sleeve 201 is put on the outer surface of the pipe and the inspection part 1 is close to the fillet weld of the pipe joint of the boiler pipe, and then fixed by the movement and coordination of the telescopic electric cylinder 5 and the clamp 6; the inspection is carried out by the ultrasonic detection device 102, and the fillet weld of the pipe joint of the boiler pipe is preliminarily inspected by the ultrasonic detection device 102. The diffraction energy signal generated when the ultrasonic wave encounters a metal defect during the propagation process is used to determine the size and depth of the defect according to the spatial difference of the diffraction wave signal, and then the magnetic powder is sprayed on the fillet weld of the pipe joint of the boiler pipe by the magnetic powder device 101 and the nozzle 104. The magnetic traces formed by the magnetic powder gathering at the defect are used to display the position and shape of the defect, which can intuitively display the morphology and size of the defect;

[0052] Step 2: When the fillet weld of the boiler pipe connection socket is large, the driving motor 204 and the transmission gear 205 are driven to make the movable gear 206 rotate in a circle around the pipe sleeve 201 to increase the spraying range of the magnetic powder equipment 101. At the same time, the transmission cooperation between the linkage gear 307 and the linkage gear ring 207 is utilized to make the three rollers 305 rotate in the volume chamber 302 and intermittently contact with the conveying pipe 103 to realize the conveying of magnetic powder.

[0053] It can be understood that when the roller 305 begins to contact and squeeze the conveying tube 103, the conveying tube 103 is compressed and closed, thereby preventing the magnetic powder from flowing back in the conveying tube 103. As the roller 305 continues to move or roll, the magnetic powder in the closed conveying tube 103 is squeezed to form a peristaltic wave, which pushes the magnetic powder to flow forward. When the roller 305 is removed and the conveying tube 103 returns to its original state, due to the pressure change in the tube, a negative pressure will be formed around the conveying tube 103, thereby sucking in new magnetic powder. This process is repeated continuously to achieve continuous transportation of magnetic powder. There is no need to introduce a new driving source, so that the detection range can be increased while detection can be performed, which greatly improves the applicability of the equipment, effectively reduces production costs, and improves the linkage between structures. In addition, the faster the speed of the drive motor, the faster the spraying speed of the magnetic powder equipment, which can be used according to demand.

[0054] This method is used to detect the fillet welds of boiler pipe sockets, which is better than the current boiler pipe socket fillet weld detection equipment in terms of comprehensiveness, accuracy and cost.

[0055] The working principle of the above embodiment is:

[0056] When in use, the pipe sleeve 201 is sleeved on the outer surface of the pipeline and the detection part 1 is placed close to the fillet weld of the pipe connection seat of the boiler pipeline, and then fixed by the movement and cooperation of the telescopic electric cylinder 5 and the clamp 6; the detection is carried out by the ultrasonic detection equipment 102, and the fillet weld of the pipe connection seat of the boiler pipeline is preliminarily detected by the ultrasonic detection equipment 102, and then the moving gear 206 is driven by the driving motor 204 and the transmission gear 205 to rotate in a circle around the pipe sleeve 201, so as to increase the spraying range of the magnetic powder equipment 101, and at the same time, the transmission cooperation of the linkage gear 307 and the linkage gear ring 207 is used to make the three rollers 305 rotate in the volume chamber 302 and intermittently contact with the conveying pipe 103, so as to realize the conveying of magnetic powder, and the magnetic powder is sprayed on the fillet weld of the pipe connection seat of the boiler pipeline through the nozzle 104, and the magnetic traces formed by the magnetic powder gathering at the defect are used to display the position and shape of the defect, so as to intuitively display the morphology and size of the defect.

[0057] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrasonic detection device for fillet welds of boiler pipe sockets, characterized in that: The invention comprises a detection part (1) for detecting fillet welds of pipe sockets of boiler pipelines, wherein the detection part (1) is composed of a magnetic powder device (101) and an ultrasonic detection device (102); the outside of the magnetic powder device (101) is fixedly connected to a delivery pipe (103), and the other end of the delivery pipe (103) is fixedly connected to a spray head (104) for spraying; A moving mechanism (2) is arranged outside the detection part (1), and the moving mechanism (2) comprises a pipe sleeve (201) for installation on a pipeline, a driving motor (204) arranged above the pipe sleeve (201), a transmission gear (205) fixedly installed on the output shaft of the driving motor (204), a moving gear (206) rotatably arranged at one end of the pipe sleeve (201), and a linkage gear ring (207) fixedly installed on the outer surface of the other end of the pipe sleeve (201), and a mounting platform (4) fixed to the magnetic powder device (101) is fixedly installed outside the moving gear (206); The magnetic powder device (101) is externally provided with a linkage structure (3) which is linked with a linkage gear ring (207) and is used to adjust the spraying amount of the magnetic powder device (101). The linkage structure (3) comprises a housing (301), a rotating disk (303) rotatably arranged in the housing (301), a mounting arm (304) welded to the outside of the rotating disk (303), a roller (305) rotatably mounted on the other end of the mounting arm (304), a connecting shaft (306) fixedly mounted on the outside of the rotating disk (303) and extending to the outside of the housing (301), and a linkage gear (307) fixedly mounted on the other end of the connecting shaft (306) and meshing with the linkage gear ring (207).

2. The ultrasonic detection device for fillet welds of boiler pipe connection sockets according to claim 1 is characterized in that: The ultrasonic detection device (102) is fixedly mounted on the upper surface of the housing (301), and the outside of the ultrasonic detection device (102) is fixedly connected to a wire (1021) connected to an ultrasonic detector.

3. The ultrasonic detection device for fillet welds of boiler pipe connection sockets according to claim 1 is characterized in that: The housing (301) is fixedly mounted on one side of the magnetic powder device (101), and a one-way valve (105) is provided at one end of the delivery pipe (103) connected to the magnetic powder device (101).

4. The ultrasonic detection device for fillet welds of boiler pipe connection sockets according to claim 1 is characterized in that: An L-shaped mounting plate (202) is fixedly mounted on the end of the pipe sleeve (201), and a motor seat (203) for fixing a driving motor (204) is fixedly mounted on the inner top wall of the mounting plate (202).

5. The ultrasonic detection device for fillet welds of boiler pipe connection sockets according to claim 1 is characterized in that: A connecting ring (208) is welded to one side of the pipe sleeve (201) close to the mounting plate (202); a limit block (209) for limiting the position of the moving gear (206) is fixedly mounted on the outer surface of the connecting ring (208); a sliding groove matched with the limit block (209) is provided on the inner side of the moving gear (206); and the moving gear (206) is mounted on the connecting ring (208) through the sliding fit between the limit block (209) and the sliding groove.

6. The ultrasonic detection device for fillet welds of boiler pipe connection sockets according to claim 1 is characterized in that: A circular volume cavity (302) is provided in the shell (301), two through holes communicating with the volume cavity (302) are provided inside the shell (301), and a delivery pipe (103) is installed around the volume cavity (302), with both ends of the delivery pipe passing through the shell (301) through the through holes; The two through holes are arranged vertically, the number of the mounting arms (304) and the number of the rollers (305) are both three, the three mounting arms (304) are equidistantly mounted on the outside of the rotating disk (303), and the three rollers (305) are intermittently abutted against the conveying pipe (103); The connecting shaft (306) extends into the volume chamber (302), and the connecting shaft (306) is connected to the interior of the housing (301) via a bearing.

7. The ultrasonic detection device for fillet welds of boiler pipe connection sockets according to claim 1 is characterized in that: A fixed structure is installed on the inner side of the pipe sleeve (201), and the fixed structure comprises a telescopic electric cylinder (5) fixedly installed on the inner top wall of the pipe sleeve (201) and a clamp (6) fixedly installed on the output end of the telescopic electric cylinder (5), wherein the outer shape of the clamp (6) is arc-shaped so as to better abut against the outer surface of the pipeline.

8. A method for ultrasonic testing of fillet welds of boiler pipe sockets, characterized in that: The ultrasonic detection device for the fillet weld of a boiler pipe connection socket as claimed in claims 1 to 7 comprises the following steps: Step 1: Before the inspection, the pipe sleeve (201) is put on the outer surface of the pipe and the inspection part (1) is close to the fillet weld of the pipe connection seat of the boiler pipe, and then the inspection part (1) is fixed by the movement and coordination of the telescopic electric cylinder (5) and the clamp (6); the inspection is carried out by the ultrasonic detection device (102), and the fillet weld of the pipe connection seat of the boiler pipe is preliminarily inspected by the ultrasonic detection device (102). The diffraction energy signal generated when the ultrasonic wave encounters a metal defect during the propagation process is used to determine the size and depth of the defect according to the spatial difference of the diffraction wave signal. Then, magnetic powder is sprayed on the fillet weld of the pipe connection seat of the boiler pipe by the magnetic powder device (101) and the nozzle (104). The magnetic trace formed by the magnetic powder gathering at the defect is used to display the position and shape of the defect, and the morphology and size of the defect can be intuitively displayed; Step 2: When the fillet weld of the boiler pipe connection socket is large, the driving motor (204) and the transmission gear (205) are driven to make the movable gear (206) rotate in a circle around the pipe sleeve (201), thereby increasing the spraying range of the magnetic powder device (101). At the same time, the transmission cooperation between the linkage gear (307) and the linkage gear ring (207) is used to make the three rollers (305) rotate in the volume chamber (302) and intermittently contact with the conveying pipe (103), thereby realizing the conveying of magnetic powder.

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