A method for inspection and testing of boiler pressure vessels

Abstract

The present invention discloses a method for inspecting and testing a boiler pressure vessel, which relates to the technical field of pressure vessel detection. The specific steps are as follows: Align the ultrasonic sensor with the furnace opening of the boiler, and make the push rod located at the center of the furnace opening. Start the electric push rod three to make the spline sleeve approach the fixed disk to unfold the curved rod three. At the same time, adjust the electric push rod two to make the ultrasonic sensor closely adhere to the inner wall of the boiler. When the ultrasonic sensor closely adheres to the inner wall of the furnace, start the motor to drive the right-angle frame to reciprocate, push the push plate to move, so that the push rod drives the ultrasonic sensor to move into the furnace interior. Through the friction between the friction wheel and the push plate, drive the push rod to rotate, so that when the push rod moves, the push rod does not rotate, and when the push rod rotates, the push rod does not move, but drives the ultrasonic sensor to detect the inner wall of the boiler. Finally, during the detection process, judge whether it is necessary to extend the push rod at the threaded groove to adapt to the internal length of the boiler through the distance measuring sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure vessel detection, and specifically provides a method for inspecting and detecting boiler pressure vessels. Background Technique

[0002] Defect detection of pressure vessels is a necessary technique in pressure vessel manufacturing. Specifically, non-destructive testing methods are used to check whether there are defects in pressure vessels, such as cracks, etc., to ensure the safety performance and service life of pressure vessels.

[0003] Currently, in the existing detection operations of pressure vessels, in order to eliminate potential safety hazards in pressure vessels and ensure the smooth progress of the production process, it is necessary for workers to use ultrasonic flaw detection equipment to detect the structure of pressure vessels to judge the integrity of pressure vessels. There is also a portable boiler pressure vessel inspection device with the publication number CN114689597A. This boiler pressure vessel inspection device can not only inspect the inside of the boiler body, but also inspect the outside of the boiler body. By setting a rotating mechanism and a lifting mechanism, the entire device can comprehensively inspect the boiler body, solving the problem that the existing inspection devices can only inspect the inside, cannot inspect the outside, and the comprehensiveness of inspection is poor.

[0004] When detecting boiler pressure vessels, it is usually necessary for workers to drill into the furnace for detection. However, since the furnace opening of the boiler is very small and the space inside the furnace is very large, it is not easy for the detection personnel to drill into the furnace for inspection, which makes the detection process very complicated and reduces the detection efficiency of the inner wall of the boiler. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for inspecting and detecting boiler pressure vessels, which solves the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides a method for inspecting and detecting boiler pressure vessels, including the following steps:

[0007] S1: First, push the support cylinder, align the ultrasonic sensor with the furnace opening of the boiler, and make the push rod located at the center of the furnace opening;

[0008] S2: Then, by starting the electric push rod three, make the spline sleeve approach the fixed disk to unfold the curved rod three, and at the same time, adjust the electric push rod two to make the ultrasonic sensor closely adhere to the inner wall of the boiler;

[0009] S3: When the ultrasonic sensor closely adheres to the inner wall of the furnace, start the motor to drive the right-angle frame to move reciprocally, and further push the push plate to move, so that the push rod drives the ultrasonic sensor to move into the furnace;

[0010] S4: Drive the push rod to rotate by the friction between the friction wheel and the push plate, so that when the push rod moves, the push rod does not rotate, and when the push rod rotates, the push rod does not move, driving the ultrasonic sensor to detect the inner wall of the boiler;

[0011] S5: Finally, during the detection process, judge whether it is necessary to extend the push rod at the threaded groove to adapt to the internal length of the boiler through the ranging sensor.

[0012] Optionally, an ultrasonic sensor is provided on the push rod, and a threaded groove is opened at the end face of the push rod. A push plate is also fixedly connected to the surface of the push rod. The support assembly is arranged on the push rod, and the push assembly is also arranged on the push rod, and the rotation assembly is arranged on the push rod.

[0013] Optionally, the support assembly includes:

[0014] A support block, the upper surface of the support block is fixedly connected to the surface of the support cylinder, the lower surface of the support block is fixedly connected to a support column, the lower end surface of the support column is fixedly connected to a support plate, the lower surface of the support plate is fixedly connected to an electric push rod, the lower surface of the electric push rod is fixedly connected to a bottom plate, and the lower surface of the bottom plate is rotatably connected to a universal wheel.

[0015] Optionally, the push assembly includes:

[0016] A first rotating rod, a motor is arranged on the upper surface of the support plate, the output end of the motor is fixedly connected to the end face of the first rotating rod, a second rotating rod is belt-driven on the surface of the first rotating rod, the surface of the second rotating rod is rotatably connected to a first fixing plate, the lower surface of the first fixing plate is fixedly connected to the upper surface of the support plate, and the end of the second rotating rod is fixedly connected to a first curved rod, and the other end of the first curved rod is hinged to a second curved rod.

[0017] Optionally, the push assembly further includes:

[0018] A moving plate, the lower surface of the moving plate is hinged to the upper end of the second curved rod, and a through slot is opened on the side surface of the moving plate. A limiting rod is slidably connected to the slot wall of the slot, the end face of the limiting rod is fixedly connected to the side surface of the support block, a second fixing plate is fixedly connected to the upper surface of the moving plate, a rotating column is fixedly connected to the side surface of the second fixing plate, a through slot is opened at the right-angle end of the right-angle frame, the slot wall of the through slot is rotatably connected to the surface of the rotating column, and the upper end of the right-angle frame abuts against the surface of the push plate, and the lower end of the right-angle frame abuts against the upper surface of the moving plate.

[0019] Optionally, the rotation assembly includes:

[0020] Bevel gear one, the end face of the bevel gear one is fixedly connected to the end face of the rotating rod one, the tooth surface of the bevel gear one is meshingly connected with bevel gear two, the end face of the bevel gear two is fixedly connected with rotating rod three, the surface of the rotating rod three is fixedly connected with fixed plate three, the lower surface of the fixed plate three is fixedly connected to the upper surface of the support plate, and the end of the rotating rod three is also belt-driven with rotating rod four, the end face of the rotating rod four is rotatably connected to the side face of the support block, the other end of the rotating rod four is fixedly connected to the inner wall of the friction wheel, and the surface of the friction wheel is rollingly connected to the surface of the push plate.

[0021] Optionally, the expansion assembly is arranged on the end surface of the push rod, and includes a connecting plate for making the ultrasonic sensor fit more closely to the inner wall of the boiler.

[0022] Optionally, the expansion component includes:

[0023] A spline rod, an end face of the spline rod is fixedly connected to the end face of the connecting plate, the end face of the connecting plate facing away from the spline rod is fixedly connected to the end face of the push rod, the surface of the spline rod is slidably connected with a spline sleeve, the surface of the spline sleeve is fixedly connected with a fixing frame 1, the inner wall of the fixing frame 1 is hinged with a curved rod 3, the lower end surface of the curved rod 3 is also hinged with a curved rod 4, the other end of the curved rod 4 is hinged with a fixing frame 2, the outer surface of the fixing frame 2 is fixedly connected with a fixing disk, the end face of the fixing disk is fixedly connected to the end face of the spline rod, and the end face of the fixing disk facing away from the spline rod is also fixedly connected with a distance measuring sensor;

[0024] The electric push rod three, the shell of the electric push rod three is fixedly connected to the end surface of the connecting plate, and the telescopic end of the electric push rod three is fixedly connected to the end surface of the spline sleeve.

[0025] Optionally, the expansion component further includes:

[0026] An electric push rod 2, the end face of which is fixedly connected to the end face of the curved rod 3 away from the spline sleeve, the telescopic end of the electric push rod 2 is fixedly connected to a fixing frame 2, the inner wall of the fixing frame 2 is hinged to the outer shell of the ultrasonic sensor, the end face of the fixing frame 2 is also fixedly connected to a limiting plate, the limiting plate is fixedly connected to a spring toward the end face of the ultrasonic sensor, and the other end of the spring is fixedly connected to the outer shell of the ultrasonic sensor.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Through the setting of the electric push rod, the detection device of the present invention can detect the inner walls of device boilers with different diameters, enabling more types of detections. Additionally, through the setting of the support cylinder, the device operates more stably during the detection process, further enhancing the stability of the detection device during detection.

[0029] 2. The present invention indirectly pushes the ultrasonic sensor to move inside the furnace first, enabling the ultrasonic sensor to move inside the boiler, thus expanding the detection range of the ultrasonic sensor and further improving the detection efficiency. Moreover, the indirect movement of the ultrasonic sensor also makes the detection more accurate when the ultrasonic sensor is detecting.

[0030] 3. When the push rod moves in the present invention, the push rod does not rotate. When the push rod rotates, it does not move to drive the ultrasonic sensor to detect the inner wall of the boiler. Compared with the traditional detection method of moving and rotating simultaneously, the ultrasonic sensor can detect the inner wall of the boiler more stably. When a problem is found, it can also better locate the problem area, thereby improving the detection accuracy and detection ability of the detection device for detecting flaws or defects on the inner wall of the boiler.

[0031] 4. The present invention uses an ultrasonic sensor that can be expanded and contracted, enabling the ultrasonic sensor to more easily enter the boiler to detect the inner wall of the boiler, further improving the convenience during detection. Additionally, by expanding the ultrasonic sensor and making it closely adhere to the inner wall of the boiler, the influence of the external environment on the ultrasonic sensor during detection can be reduced, further enhancing the detection accuracy of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a flowchart of the structure of the present invention;

[0033] Figure 2 is a front view of the structure of the present invention;

[0034] Figure 3 is an enlarged view of the structure of the thread groove position in the present invention;

[0035] Figure 4 is an enlarged view of the structure of the expansion component in the present invention;

[0036] Figure 5 is an enlarged view of the structure of the rotation component in the present invention;

[0037] Figure 6 is an enlarged view of the structure of the push component in the present invention;

[0038] Figure 7 is in the present invention Figure 4 an enlarged view of the structure at location A inside.

[0039] In the figure: 1, bottom plate; 2, electric push rod; 3, push rod; 4, support cylinder; 5, universal wheel; 6, support plate; 7, thread groove; 8, push plate; 9, electric push rod three; 10, connecting plate; 11, spline rod; 12, ranging sensor; 13, fixed disk; 14, fixing bracket two; 15, electric push rod two; 16, curved rod four; 17, curved rod three; 18, fixing bracket one; 19, spline sleeve; 20, friction wheel; 21, rotating rod four; 22, rotating rod three; 23, fixing plate three; 24, bevel gear two; 25, bevel gear one; 26, rotating rod one; 27, motor; 28, support block; 29, support column; 30, curved rod one; 31, curved rod two; 32, right-angle frame; 33, rotating column; 34, limiting rod; 35, moving plate; 36, rotating rod two; 37, fixing plate two; 38, fixing plate one; 39, limiting plate; 40, spring; 41, ultrasonic sensor; 42, fixing bracket two. Specific implementation mode

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment: Please refer to Figures 1 to 7 , the present embodiment provides a method for inspecting and detecting boiler pressure vessels as follows:

[0042] First, push the support cylinder 4 to align the ultrasonic sensor 41 with the furnace opening of the boiler and make the push rod 3 located at the center of the furnace opening;

[0043] Then, by starting the electric push rod three 9, the spline sleeve 19 is moved closer to the fixed disk 13 to expand the curved rod three 17, and at the same time, the electric push rod two 15 is adjusted to make the ultrasonic sensor 41 closely adhere to the inner wall of the boiler;

[0044] When the ultrasonic sensor 41 is closely attached to the inner wall of the furnace, start the motor 27 to drive the right-angle frame 32 to move reciprocally, and further push the push plate 8 to move, so that the push rod 3 drives the ultrasonic sensor 41 to move into the furnace;

[0045] The friction between the friction wheel 20 and the push plate 8 drives the push rod 3 to rotate, so that when the push rod 3 moves, the push rod 3 does not rotate, and when the push rod 3 rotates, the push rod 3 does not move to drive the ultrasonic sensor 41 to detect the inner wall of the boiler;

[0046] Finally, during the detection process, the ranging sensor 12 is used to determine whether it is necessary to extend the push rod 13 at the thread groove 7 to adapt to the internal length of the boiler.

[0047] It should be noted that, please refer to Figures 2 to 7 , the boiler pressure vessel inspection and testing device used in the boiler pressure vessel inspection and testing method includes a push rod 3, an ultrasonic sensor 41 is arranged on the push rod 3, and a thread groove 7 is formed in the end face of the push rod 3. A push plate 8 is also fixedly connected to the surface of the push rod 3. The support assembly is arranged on the push rod 3, and the support assembly includes:

[0048] A support cylinder 4 and a support block 28, the upper surface of the support block 28 is fixedly connected to the surface of the support cylinder 4, the lower surface of the support block 28 is fixedly connected to a support column 29, the lower end face of the support column 29 is fixedly connected to a support plate 6, the lower surface of the support plate 6 is fixedly connected to an electric push rod 2, the lower surface of the electric push rod 2 is fixedly connected to a bottom plate 1, and the lower surface of the bottom plate 1 is rotatably connected to a universal wheel 5.

[0049] In this embodiment, when using this detection device, push the support cylinder 4 by hand to make the opening of the support cylinder 4 located at the center of the circle of the boiler opening, and then push the ultrasonic sensor 41 on this detection device into the furnace, that is, the preliminary installation is completed;

[0050] With the setting of this support assembly, through the setting of the electric push rod 2, this detection device can detect the inner walls of boilers with different diameters, and the types of detection are more. Also, through the setting of the support cylinder 4, during the detection process, this device runs more smoothly, further improving the stability of this detection device during the detection process.

[0051] It should be noted that a push component is also included in this embodiment, and the push component is also arranged on the push rod 3. The push component includes:

[0052] A right-angle frame 32 and a first rotating rod 26. A motor 27 is arranged on the upper surface of the support plate 6, the output end of the motor 27 is fixedly connected to the end face of the first rotating rod 26. A second rotating rod 36 is belt-driven on the surface of the first rotating rod 26. The surface of the second rotating rod 36 is rotatably connected to a first fixing plate 38, the lower surface of the first fixing plate 38 is fixedly connected to the upper surface of the support plate 6, and the end of the second rotating rod 36 is fixedly connected to a first curved rod 30, and the other end of the first curved rod 30 is hinged to a second curved rod 31;

[0053] The moving plate 35 has its lower surface hinged to the upper end of the second curved rod 31. A through notch is provided on the side surface of the moving plate 35. A limiting rod 34 is slidably connected to the notch wall of the notch. The end face of the limiting rod 34 is fixedly connected to the side surface of the support block 28. A second fixing plate 37 is fixedly connected to the upper surface of the moving plate 35. A rotating column 33 is fixedly connected to the side surface of the second fixing plate 37. A through slot is provided at the right-angle end of the right-angle frame 32. The slot wall of the through slot is rotatably connected to the surface of the rotating column 33. The upper end of the right-angle frame 32 abuts against the surface of the pushing plate 8, and the lower end of the right-angle frame 32 abuts against the upper surface of the moving plate 35.

[0054] In this embodiment, after the detection device is installed in the correct position, the motor 27 is started to rotate, driving the first rotating rod 26 to rotate. The first rotating rod 26 rotates to drive the second rotating rod 36 to rotate through the belt, further causing the first curved rod 30 to rotate, thereby driving the second curved rod 31 to deflect. Further, the moving plate 35 can be driven to slide reciprocally on the limiting rod 34, so that the right-angle frame 32 has the following movement modes:

[0055] First: When the right-angle frame 32 moves towards the support block 28, the upper end of the right-angle frame 32 will deflect under the action of the pushing plate 8, driving the lower end of the right-angle frame 32 to move upward, and there is no restriction to limit the movement of the right-angle frame 32, so the pushing plate 8 is not driven to move.

[0056] Second: When the right-angle frame 32 moves away from the support block 28, the upper end of the right-angle frame 32 will abut against the upper end of the pushing plate 8, and the lower end of the right-angle frame 32 will abut against the upper surface of the moving plate 35. Further, the pushing plate 8 is pushed to move into the furnace, so that the ultrasonic sensor 41 moves into the boiler, thereby performing detection.

[0057] The setting of this pushing assembly indirectly drives the ultrasonic sensor 41 to move into the furnace first, so that the ultrasonic sensor 41 moves inside the boiler, making the detection range of the ultrasonic sensor 41 wider, further improving the detection efficiency, and also making the detection of the ultrasonic sensor 41 more accurate due to the indirect movement of the ultrasonic sensor 41.

[0058] Please refer to Figure 2 、 Figure 5 and Figure 6 In this embodiment, the rotating assembly is arranged on the pushing rod 3. The rotating assembly includes:

[0059] The friction wheel 20 and the first bevel gear 25, the end face of the first bevel gear 25 is fixedly connected to the end face of the first rotating rod 26, the tooth surface of the first bevel gear 25 is meshed with the second bevel gear 24, the end face of the second bevel gear 24 is fixedly connected to the third rotating rod 22, the surface of the third rotating rod 22 is fixedly connected to the third fixing plate 23, the lower surface of the third fixing plate 23 is fixedly connected to the upper surface of the support plate 6, and the end of the third rotating rod 22 is also belt-driven with the fourth rotating rod 21, the end face of the fourth rotating rod 21 is rotatably connected to the side face of the support block 28, the other end of the fourth rotating rod 21 is fixedly connected to the inner wall of the friction wheel 20, and the surface of the friction wheel 20 is in rolling connection with the surface of the push plate 8.

[0060] In this embodiment, the rotation of the first rotating rod 26 drives the first bevel gear 25 to rotate, which further drives the meshed second bevel gear 24 to rotate, further causing the third rotating rod 22 to rotate, and then the fourth rotating rod 21 to rotate through the belt, thereby driving the friction wheel 20 to rotate, causing the push plate 8 to rotate, and further causing the push rod 3 to rotate. It is also linked with the push assembly. When the push rod 3 moves, the surface of the friction wheel 20 is disengaged from the surface of the push plate 8, so that the push rod 3 only moves without rotating. When the push rod 3 does not move, the surface of the friction wheel 20 is in contact with the surface of the push plate 8, thereby driving the push plate 8 to rotate, and further causing the push rod 3 to rotate to drive the ultrasonic sensor 41 to rotate on the inner wall of the boiler;

[0061] The setting of this rotating assembly drives the ultrasonic sensor 41 to detect the inner wall of the boiler when the push rod 3 moves without rotating and rotates without moving. Compared with the traditional detection method of moving and rotating at the same time, the ultrasonic sensor 41 can detect the inner wall of the boiler more stably. When a problem is found, the problem location can be better located, thereby improving the detection accuracy and detection ability of this detection device for defects or flaws on the inner wall of the boiler.

[0062] Please refer to Figure 2 、 Figure 4 and Figure 7 In this embodiment, the unfolding assembly is arranged on the end face of the push rod 3, and the unfolding assembly includes:

[0063] Connecting plate 10 and spline shaft 11, the end face of spline shaft 11 is fixedly connected to the end face of connecting plate 10, the end face of connecting plate 10 facing away from spline shaft 11 is fixedly connected to the end face of push rod 3, the surface of spline shaft 11 is slidably connected with spline sleeve 19, the surface of spline sleeve 19 is fixedly connected with fixing frame one 18, the inner wall of fixing frame one 18 is hinged with curved rod three 17, the lower surface of curved rod three 17 is also hinged with curved rod four 16, the other end of curved rod four 16 is hinged with fixing frame two 14, the outer surface of fixing frame two 14 is fixedly connected with fixing disk 13, the end face of fixing disk 13 is fixedly connected to the end face of spline shaft 11, and the end face of fixing disk 13 facing away from spline shaft 11 is also fixedly connected with distance measuring sensor 12;

[0064] Electric push rod three 9, the housing of electric push rod three 9 is fixedly connected to the end face of connecting plate 10, and the telescopic end of electric push rod three 9 is fixedly connected to the end face of spline sleeve 19;

[0065] Electric push rod two 15, the end face of electric push rod two 15 is fixedly connected to the end face of curved rod three 17 away from spline sleeve 19, the telescopic end of electric push rod two 15 is fixedly connected with fixing frame two 42, the inner wall of fixing frame two 42 is hinged with the housing of ultrasonic sensor 41, the end face of fixing frame two 42 is also fixedly connected with limiting plate 39, the end face of limiting plate 39 facing ultrasonic sensor 41 is fixedly connected with spring 40, and the other end of spring 40 is fixedly connected to the housing of ultrasonic sensor 41.

[0066] In this embodiment, electric push rod three 9 is used to gradually move spline sleeve 19 closer to fixing disk 13, further expand curved rod three 17, drive electric push rod two 15 fixedly connected thereto to expand around, push ultrasonic sensor 41 to the inner wall of the boiler, and by adjusting the length of electric push rod two 15, the detection device can also be adapted to different boiler diameters. After ultrasonic sensor 41 is pushed to the inner wall of the boiler, spring 40 is used to make the detection end of ultrasonic sensor 41 closely fit the inner wall of the boiler, so as to conduct detection;

[0067] The setting of this expansion assembly enables ultrasonic sensor 41 to enter the boiler more easily through the expandable and retractable ultrasonic sensor 41, so as to detect the inner wall of the boiler, further improving the convenience during detection. And by expanding ultrasonic sensor 41 to make it closely adhere to the inner wall of the boiler, the influence of the external environment on ultrasonic sensor 41 during the detection process can be reduced, further improving the detection accuracy of this detection device.

[0068] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for inspection and testing of boiler pressure vessels, characterized in that: It includes the following steps: Lifting and placing: Push the support cylinder (4) to align the ultrasonic sensor (41) with the furnace opening of the boiler, and make the push rod (3) located at the center of the circle of the furnace opening; Expanding and fitting: Start the third electric push rod (9) to make the spline sleeve (19) approach the fixed disk (13) to expand the third curved rod (17), and at the same time, adjust the second electric push rod (15) to make the ultrasonic sensor (41) closely adhere to the inner wall of the boiler; Pushing and detecting: When the ultrasonic sensor (41) is closely adhered to the inner wall of the furnace, start the motor (27) to drive the right-angle frame (32) to reciprocate, push the push plate (8) to move, so that the push rod (3) drives the ultrasonic sensor (41) to move into the furnace; Rotating and detecting: Drive the push rod (3) to rotate through the friction between the friction wheel (20) and the push plate (8), so that when the push rod (3) moves, the push rod (3) does not rotate, and when the push rod (3) rotates, the push rod (3) does not move, but drives the ultrasonic sensor (41) to detect the inner wall of the boiler; Extending the push rod: Finally, during the detection process, judge whether it is necessary to extend the push rod (13) at the threaded groove (7) to adapt to the internal length of the boiler through the distance measuring sensor (12); A support assembly, a push assembly, and a rotating assembly are provided on the push rod (3); The push assembly includes: A right-angle frame (32) and a first rotating rod (26). A motor (27) is provided on the upper surface of the support plate (6). The output end of the motor (27) is fixedly connected to the end face of the first rotating rod (26). A second rotating rod (36) is belt-driven on the surface of the first rotating rod (26). A first fixing plate (38) is rotatably connected to the surface of the second rotating rod (36). The lower surface of the first fixing plate (38) is fixedly connected to the upper surface of the support plate (6), and the end of the second rotating rod (36) is fixedly connected to a first curved rod (30). The other end of the first curved rod (30) is hinged to a second curved rod (31); The push assembly further includes: A moving plate (35). The lower surface of the moving plate (35) is hinged to the upper end of the second curved rod (31). A through notch is provided on the side surface of the moving plate (35). A limiting rod (34) is slidably connected to the notch wall of the notch. The end face of the limiting rod (34) is fixedly connected to the side surface of the support block (28). A second fixing plate (37) is fixedly connected to the upper surface of the moving plate (35). A rotating column (33) is fixedly connected to the side surface of the second fixing plate (37). A through through groove is provided at the right-angle end of the right-angle frame (32). The groove wall of the through groove is rotatably connected to the surface of the rotating column (33), and the upper end of the right-angle frame (32) abuts against the surface of the push plate (8), and the lower end of the right-angle frame (32) abuts against the upper surface of the moving plate (35).

2. A boiler and pressure vessel inspection and testing method according to claim 1, characterized in that: An ultrasonic sensor (41) is provided on the push rod (3), and a threaded groove (7) is provided at the end face of the push rod (3). A push plate (8) is also fixedly connected to the surface of the push rod (3).

3. A boiler and pressure vessel inspection and testing method according to claim 2, characterized in that: The support assembly includes: A support tube (4) and a support block (28), wherein the upper surface of the support block (28) is fixedly connected to the surface of the support tube (4), the lower surface of the support block (28) is fixedly connected to a support column (29), the lower end surface of the support column (29) is fixedly connected to a support plate (6), the lower surface of the support plate (6) is fixedly connected to an electric push rod (2), the lower surface of the electric push rod (2) is fixedly connected to a bottom plate (1), and the lower surface of the bottom plate (1) is rotatably connected to a universal wheel (5).

4. A boiler and pressure vessel inspection and testing method according to claim 3, characterized in that: The rotating assembly comprises: A friction wheel (20) and a bevel gear 1 (25), the end face of the bevel gear 1 (25) is fixedly connected to the end face of the rotating rod 1 (26), the tooth surface of the bevel gear 1 (25) is meshingly connected with the bevel gear 2 (24), the end face of the bevel gear 2 (24) is fixedly connected to the rotating rod 3 (22), the surface of the rotating rod 3 (22) is fixedly connected to the fixing plate 3 (23), the lower surface of the fixing plate 3 (23) is fixedly connected to the upper surface of the support plate (6), and the end of the rotating rod 3 (22) is also belt-driven with the rotating rod 4 (21), the end face of the rotating rod 4 (21) is rotatably connected to the side surface of the support block (28), the other end of the rotating rod 4 (21) is fixedly connected to the inner wall of the friction wheel (20), and the surface of the friction wheel (20) is rollingly connected to the surface of the push plate (8).

5. A boiler and pressure vessel inspection and testing method according to claim 4, characterized in that: An expansion assembly is provided on the end surface of the push rod (3), comprising a connecting plate (10) for making the ultrasonic sensor (41) fit more closely to the inner wall of the boiler.

6. A boiler and pressure vessel inspection and testing method according to claim 4, characterized in that: The unfolding assembly comprises a spline rod (11) and an electric push rod three (9), the end face of the spline rod (11) is fixedly connected to the end face of the connecting plate (10), the end face of the connecting plate (10) facing away from the spline rod (11) is fixedly connected to the end face of the push rod (3), the surface of the spline rod (11) is slidably connected to a spline sleeve (19), and the surface of the spline sleeve (19) is fixedly connected to a fixing frame one (18).

7. A boiler and pressure vessel inspection and testing method according to claim 6, characterized in that: The inner wall of the fixing frame 1 (18) is hinged with a curved rod 3 (17), the lower end surface of the curved rod 3 (17) is also hinged with a curved rod 4 (16), the other end of the curved rod 4 (16) is hinged with a fixing frame 2 (14), the outer surface of the fixing frame 2 (14) is fixedly connected with a fixing plate (13), the end surface of the fixing plate (13) is fixedly connected with the end surface of the spline rod (11), and the end surface of the fixing plate (13) facing away from the spline rod (11) is also fixedly connected with a distance sensor (12).

8. A method for inspecting and testing a boiler pressure vessel according to claim 7, characterized in that: The outer shell of the electric push rod three (9) is fixedly connected to the end surface of the connecting plate (10), and the telescopic end of the electric push rod three (9) is fixedly connected to the end surface of the spline sleeve (19).

9. A boiler pressure vessel inspection and testing method according to claim 8, characterized in that: The expansion component also includes: The second electric push rod (15), the end face of the second electric push rod (15) is fixedly connected to the end face of the third curved rod (17) away from the spline sleeve (19), a second fixed frame (42) is fixedly connected to the telescopic end of the second electric push rod (15), the inner wall of the second fixed frame (42) is hinged to the outer shell of the ultrasonic sensor (41), a limiting plate (39) is further fixedly connected to the end face of the second fixed frame (42), a spring (40) is fixedly connected to the end face of the limiting plate (39) facing the ultrasonic sensor (41), and the other end of the spring (40) is fixedly connected to the outer shell of the ultrasonic sensor (41).

Images