Apparatus and method for relieving internal residual stress of a hot-wall hydrogenation reactor

Abstract

The present application relates to the technical field of metal material processing, and particularly relates to a residual stress elimination device and method for a hot-wall hydrogenation reactor. The residual stress elimination device for the hot-wall hydrogenation reactor comprises a mounting frame, a main cylinder, a first punch needle and a second punch needle. The mounting frame is arranged on a plane where a weld is located and slides along the length direction of the weld. The main cylinder is slidingly arranged on the mounting frame. The first punch needle and the second punch needle are slidingly arranged on the main cylinder and are rotationally connected with the main cylinder. The first punch needle is in contact with a weld toe of the weld, and the second punch needle is in contact with a surface of the weld. The first punch needle and the second punch needle are arranged to hit the surface and the weld toe of the weld respectively, so as to eliminate the stress in the weld area and improve the efficiency. The mounting frame is arranged, the distance between the main cylinder and the weld is kept unchanged, and the main cylinder can move along the length direction of the weld, so that the angle and the force of the first punch needle and the second punch needle when hitting the weld each time are ensured, and the weld stress is eliminated more uniformly and completely.

Description

Technical Field

[0001] This invention relates to the field of metal material processing technology, and in particular to a device and method for eliminating residual stress inside a hot-wall hydrogenation reactor. Background Technology

[0002] In the petrochemical industry, hot-wall hydrotreating reactors, as core pressure-bearing equipment for crude oil hydrorefining and hydrocracking, directly determine the safety and service life of the equipment through the structural integrity of their bodies and welds. The welds of these reactors are mostly prepared using arc welding. Arc welding melts the base material and filler metal through the electric arc heat generated between the electrode and the workpiece, forming a weld connection structure that meets the basic requirements of hot-wall hydrotreating reactors for weld strength and sealing. However, during arc welding, the weld area is prone to significant residual tensile stress due to localized high-temperature heating and rapid cooling. If this residual stress is not effectively eliminated, long-term operation under high temperature, high pressure, and strong corrosion conditions can easily lead to weld crack propagation, and even equipment leakage or failure. Therefore, eliminating residual stress after welding is a crucial aspect of the manufacturing and maintenance of hot-wall hydrotreating reactors, and ultrasonic impact equipment, as a supporting accessory for arc welding equipment, is the core tool for achieving this crucial step.

[0003] However, most existing ultrasonic impact devices used in hot-wall hydrogenation reactors are handheld, and their impact effect is highly dependent on the operator's technique and experience. For inexperienced operators, improper control of the impact angle and force can exacerbate uneven wear of the impact pin, shorten its service life, and increase equipment maintenance costs. At the same time, deviations in operating techniques can lead to uneven impact energy transmission on the weld surface or weld toe, resulting in incomplete stress relief in some areas and residual harmful tensile stress. This makes it impossible to achieve the ideal stress control effect and meet the stringent requirements of hot-wall hydrogenation reactors for weld stress relief precision. Summary of the Invention

[0004] Therefore, it is necessary to provide a device and method for eliminating residual stress inside a hot-wall hydrogenation reactor, addressing the problem of the inconvenience of using current ultrasonic impact equipment.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A device for eliminating residual stress inside a hot-wall hydrogenation reactor includes a mounting frame, a main cylinder, a first punch, a second punch, an adjustment mechanism, and an ultrasonic transducer. The mounting frame is disposed on the plane of the weld and slides along the length of the weld. The main cylinder is slidably disposed on the mounting frame along its own axial direction and is perpendicular to the plane of the weld. The first punch and the second punch are slidably disposed on the main cylinder along its axial direction and extend along the axial direction of the main cylinder. The first punch and the main cylinder are rotatably connected. The first punch contacts the weld toe of the weld, and the second punch contacts the surface of the weld. The adjustment mechanism includes a mounting plate, a drive assembly, and a transmission assembly. The mounting plate is movably disposed inside the main cylinder. The first punch and the second punch are slidably connected to the mounting plate and abut against the mounting plate along the axial direction of the main cylinder. The drive assembly is used to drive the mounting plate to slide within the main cylinder along the width direction of the weld. The transmission assembly is used to control the rotation of the first punch and the sliding of the second punch along the width direction of the weld when the mounting plate slides. The ultrasonic transducer is used to control the vibration of the mounting plate in the axial direction of the main cylinder.

[0007] Preferably, the drive assembly includes a rotating plate, a sliding plate, a connecting rod, and a first motor. A horizontal plate is fixedly installed inside the main cylinder, located on the side of the mounting plate away from the weld. The rotating plate is rotatably positioned on the side of the horizontal plate close to the mounting plate. The sliding plate is slidably disposed inside the main cylinder along a first direction and located between the rotating plate and the mounting plate. The first direction is the radial direction of the main cylinder. The mounting plate is slidably connected to the sliding plate along a second direction, which is the radial direction of the main cylinder and perpendicular to the first direction. The connecting rod is Z-shaped, with one end passing through the sliding plate and connecting to the rotating plate. The connecting rod is slidably connected to the sliding plate along the second direction, and the other end of the connecting rod is rotatably connected to the mounting plate and slidably connected to the mounting plate along the first direction. The first motor is disposed on the horizontal plate and is used to drive the rotating plate to rotate.

[0008] Preferably, the main cylinder includes an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder are coaxial and rotatably connected, the horizontal plate is fixedly installed in the lower cylinder, the lower cylinder is provided with bolts, the bolts are threadedly connected to the lower cylinder and can abut against the upper cylinder in the radial direction of the upper cylinder.

[0009] Preferably, the transmission assembly includes a turntable and a rotating wheel. The turntable is rotatably disposed in the lower cylinder, coaxial with the mounting plate and located on the side of the mounting plate near the weld. The second punch penetrates the turntable and is slidably connected to the turntable along the radial direction. The rotating wheel is rotatably disposed in the lower cylinder and meshes with the turntable. The rotating wheel has a rotating sleeve inside that slides along the axial direction of the rotating wheel and penetrates the rotating wheel and the lower cylinder. One end of the rotating sleeve located in the lower cylinder is slidably connected to the mounting plate and abuts against the mounting plate along the axial direction of the lower cylinder. The end of the first punch away from the weld toe is threadedly connected to the rotating sleeve and the two are coaxial.

[0010] Preferably, there are four second punches arranged along the circumferential direction of the mounting plate. A hinge plate is provided between two adjacent second punches. Each hinge plate is rotatably connected to two adjacent second punches, and each second punch is slidably connected to the turntable along the radial direction of the turntable.

[0011] Preferably, the four second punches are divided into two groups, with two punches in each group. The line connecting the two second punches in each group passes through the center of the mounting plate. The mounting plate has two sets of mounting holes, which are symmetrical about the center of the mounting plate. There are multiple mounting holes in each group, and the multiple mounting holes in each group are arranged along the radial direction of the mounting plate. Two second punches in one group are threadedly connected to the mounting plate through the two sets of mounting holes.

[0012] Preferably, there are two rotating wheels and two first punches. The two rotating wheels are arranged along the first direction and respectively mesh with the turntable. Each first punch corresponds to one rotating wheel, and the two first punches correspond to the two weld toes of the weld.

[0013] Preferably, the mounting frame includes a collar, support legs, and a magnetic wheel. The collar is sleeved on the outside of the lower cylinder and slidably connected to the upper cylinder. There are two support legs, which are located on both sides of the collar in the weld width direction and are rotatably connected to the collar respectively. The magnetic wheel is rotatably mounted on the support leg and contacts the plane where the weld is located.

[0014] Preferably, the mounting frame is equipped with a second motor for driving the magnetic wheel to rotate, and each leg is provided with two connecting plates on both sides in the weld length direction. The rotation axis of the connecting plates extends along the weld length direction, and the magnetic wheel is connected to the leg through the connecting plates.

[0015] The present invention also provides a method for eliminating residual stress inside a hot-wall hydrogenation reactor, comprising the following steps:

[0016] S1. First, place the mounting bracket at the location of the weld, and align the first punch with the weld toe and the second punch with the surface of the weld.

[0017] S2. Start the drive assembly. The drive assembly controls the mounting plate to slide inside the main cylinder. The sliding mounting plate controls the first punch to rotate and controls the second punch to slide along the width direction of the weld seam through the transmission assembly.

[0018] S3. Start the ultrasonic transducer. The ultrasonic transducer controls the first and second punches to strike the weld seam through the mounting plate.

[0019] The beneficial effects of this invention are as follows: The first and second punches strike the surface and weld toe of the weld respectively, eliminating stress in the weld area and improving efficiency; the mounting frame maintains a constant distance between the main cylinder and the weld and can move along the length of the weld, ensuring the angle and force of each strike by the first and second punches, resulting in more uniform and thorough stress elimination; the drive and transmission components allow the first punch to rotate when striking the weld toe, resulting in more uniform force distribution, extending its service life, and ensuring effective striking of the weld toe. The second punch slides along the width of the weld, and the mounting frame, sliding along the length of the weld, provides more comprehensive surface striking, further improving efficiency. Attached Figure Description

[0020] Figure 1 A schematic diagram of a device for eliminating residual stress inside a hot-wall hydrogenation reactor provided in an embodiment of the present invention;

[0021] Figure 2 A top view of a device for eliminating residual stress inside a hot-wall hydrogenation reactor provided in an embodiment of the present invention;

[0022] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0023] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0024] Figure 5 for Figure 2 Sectional view along the BB direction;

[0025] Figure 6 for Figure 5 Enlarged view of point D in the middle;

[0026] Figure 7 This is a schematic diagram of the lower cylinder of a device for eliminating residual stress inside a hot-wall hydrogenation reactor, provided in an embodiment of the present invention.

[0027] Figure 8 The right view of the lower cylinder of a device for eliminating residual stress inside a hot-wall hydrogenation reactor provided in an embodiment of the present invention;

[0028] Figure 9 for Figure 8 A sectional view along the EE direction;

[0029] Figure 10 This is a schematic diagram of the mounting plate of a device for eliminating residual stress inside a hot-wall hydrogenation reactor, provided in an embodiment of the present invention.

[0030] in:

[0031] 100. Upper cylinder; 101. Lower cylinder; 102. First punch; 103. Second punch; 104. Mounting plate; 105. Rotating plate; 106. Slide plate; 107. Connecting rod; 108. First motor; 109. Horizontal plate; 110. First slide groove; 111. Second slide groove; 112. Positioning rod; 113. Slide rail; 114. Third slide groove; 115. Turntable; 116. Rotating wheel; 117. Rotating sleeve; 118. Fourth slide groove; 119. Hinge plate; 120. Mounting hole; 121. Collar; 122. Support leg; 123. Magnetic wheel; 124. Second motor; 125. Connecting plate; 126. Ultrasonic transducer; 127. Top rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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 limiting the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] like Figures 1 to 10As shown, this embodiment of the invention provides a device for eliminating residual stress inside a hot-wall hydrogenation reactor, including a mounting frame, a main cylinder, a first punch 102, a second punch 103, an adjustment mechanism, and an ultrasonic transducer 126. The mounting frame is disposed on the plane of the weld and slides along the length of the weld. The main cylinder is slidably disposed on the mounting frame along its own axial direction and is perpendicular to the plane of the weld. The first punch 102 and the second punch 103 are slidably disposed on the main cylinder along its axial direction and extend along the axial direction of the main cylinder. The first punch 102 is rotatably connected to the main cylinder, and the first punch 102 contacts the weld toe of the weld. The second punch 103 contacts the surface of the weld; the adjustment mechanism includes a mounting plate 104, a drive assembly, and a transmission assembly. The mounting plate 104 is movably disposed inside the main cylinder. The first punch 102 and the second punch 103 are slidably connected to the mounting plate 104 and abut against the mounting plate 104 along the axial direction of the main cylinder; the drive assembly is used to drive the mounting plate 104 to slide within the main cylinder along the width direction of the weld, and the transmission assembly is used to control the rotation of the first punch 102 and the sliding of the second punch 103 along the width direction of the weld when the mounting plate 104 slides; the ultrasonic transducer 126 is used to control the vibration of the mounting plate 104 in the axial direction of the main cylinder.

[0036] Specifically, the ultrasonic transducer 126 is provided with a push rod 127, which abuts against the mounting plate 104 in the first direction. The ultrasonic transducer 126 drives the mounting plate 104 to vibrate through the push rod 127.

[0037] The system includes a first punch 102 and a second punch 103, which strike the surface and toe of the weld respectively to eliminate stress in the weld area and improve efficiency. A mounting frame is provided, maintaining a constant distance between the main cylinder and the weld, and allowing it to move along the length of the weld. This ensures the angle and force of each strike by the first and second punches 102 and 103, resulting in more uniform and thorough stress elimination. A drive assembly and a transmission assembly are included. The first punch 102 rotates when striking the toe, ensuring more even force distribution, extending its service life, and guaranteeing effective striking of the toe. The second punch 103 slides along the width of the weld. As the mounting frame slides along the length of the weld, the surface of the weld is struck more comprehensively, further improving efficiency.

[0038] In this embodiment, the drive assembly includes a rotating plate 105, a sliding plate 106, a connecting rod 107, and a first motor 108. A horizontal plate 109 is fixedly installed inside the main cylinder. The horizontal plate 109 is located on the side of the mounting plate 104 away from the weld seam. The horizontal plate 109 passes through the axis of the main cylinder. The rotating plate 105 is rotatably disposed on the side of the horizontal plate 109 close to the mounting plate 104, and the rotation axis of the rotating plate 105 coincides with the axis of the main cylinder. The mounting plate 104 is provided with a first sliding groove 110 and a second sliding groove 111. The extension directions of the first sliding groove 110 and the second sliding groove 111 on the mounting plate 104 are perpendicular to each other. The slide plate 106 is slidably disposed inside the main cylinder along a first direction and located between the rotating plate 105 and the mounting plate 104. The first direction is the radial direction of the main cylinder. The mounting plate 104 is provided with a positioning rod 112, which is slidably disposed in the first slide groove 110. The mounting plate 104 is slidably connected to the slide plate 106 along a second direction through the cooperation of the positioning rod 112 and the first slide groove 110. The second direction is the radial direction of the main cylinder and perpendicular to the first direction. The connecting rod 107 is Z-shaped. One end of the connecting rod 107 passes through the slide plate 106 and is connected to the rotating plate 105. The connecting rod 107 is slidably connected to the slide plate 106 along the second direction. The other end of the connecting rod 107 is rotatably connected to the mounting plate 104 through the second slide groove 111 and is slidably connected to the mounting plate 104 along the first direction. The connecting rod 107 is located on the side of the gripper plate away from the axis of the main cylinder. The first motor 108 is disposed on the horizontal plate 109 and is used to drive the rotating plate 105 to rotate.

[0039] Specifically, the main cylinder is provided with a slide rail 113, and the slide plate 106 is slidably disposed in the slide rail 113 along the first direction. The slide plate 106 is provided with a third slide groove 114, which passes through the slide plate 106 along the axial direction of the main cylinder. One end of the connecting rod 107 connected to the rotating plate 105 is slidably disposed in the third slide groove 114, and the bend of the connecting rod 107 is located on the side of the slide plate 106 near the mounting plate 104. When the rotating plate 105 rotates and drives the connecting rod 107 to rotate, the connecting rod 107 drives the sliding plate 106 and the mounting plate 104 to slide synchronously in the first direction. Under the action of the connecting rod 107, the mounting plate 104 slides relative to the sliding plate 106 in the second direction. The sliding path of the mounting plate 104 in the main cylinder is elliptical. The ellipse has a minor axis and a major axis. The distance between the two vertices on the major axis corresponds to the width of the weld. The second punch 103 strikes the surface of the weld as it travels along the elliptical path with the mounting plate 104. Thus, when the mounting frame drives the main cylinder to move along the length of the weld, the weld that it passes through can be struck comprehensively, which improves efficiency.

[0040] In this embodiment, the main cylinder includes an upper cylinder 100 and a lower cylinder 101. The upper cylinder 100 and the lower cylinder 101 are coaxial and rotatably connected. A horizontal plate 109 is fixedly installed in the lower cylinder 101. Bolts are provided on the lower cylinder 101. The bolts are threadedly connected to the lower cylinder 101 and can abut against the upper cylinder 100 in the radial direction of the upper cylinder 100, thereby restricting the relative rotation of the upper cylinder 100 and the lower cylinder 101. When the weld is narrow, the bolts are loosened and the lower cylinder 101 is rotated to adjust the distance between the two first punches 102 in the weld width direction, so that the two first punches 102 hammer the weld toe on the weld.

[0041] Rotating the bolt allows the upper cylinder 100 and the lower cylinder 101 to rotate relative to each other, thereby adjusting the position of the two first punches 102 according to the distance between the two weld toes on the weld, so that the two first punches 102 can hammer the two weld toes to adapt to welds of different widths.

[0042] The upper cylinder 100 is equipped with a handrail to facilitate operation. The upper cylinder 100 can also be installed on fixed equipment, eliminating the need for manual operation.

[0043] In this embodiment, the transmission assembly includes a turntable 115 and a rotating wheel 116. The turntable 115 is rotatably disposed in the lower cylinder 101. The turntable 115 is coaxial with the mounting plate 104 and located on the side of the mounting plate 104 near the weld. The second punch 103 passes through the turntable 115 and is slidably connected to the turntable 115 along the radial direction of the turntable 115. The rotating wheel 116 is rotatably disposed in the lower cylinder 101 and meshes with the turntable 115. The rotating wheel 116 has a rotating sleeve 117 inside that slides along the axial direction of the rotating wheel 116 and passes through the rotating wheel 116 and the lower cylinder 101. The rotating sleeve 117 is keyed to the rotating wheel 116 to rotate synchronously with the rotating wheel 116. One end of the rotating sleeve 117 located in the lower cylinder 101 is slidably connected to the mounting plate 104 and abuts against the mounting plate 104 along the axial direction of the lower cylinder 101. The end of the first punch 102 away from the weld toe is threadedly connected to the rotating sleeve 117 and the two are coaxial.

[0044] Specifically, a fourth groove 118 is provided on the turntable 115. The second punch 103 is slidably disposed in the fourth groove 118 along the radial direction of the turntable 115 and does not abut against the turntable 115. The second punch 103 moves elliptically through the fourth groove 118, driving the turntable 115 to reciprocate around its own axis. The meshing between the turntable 115 and the rotating wheel 116 drives the first punch 102 to rotate, allowing the first punch 102 to strike the weld toe at different positions, thus preventing the first punch 102 from using the same position for a long time and shortening its service life.

[0045] The rotating sleeve 117 is provided with a bolt, which is rotatably connected to the rotating sleeve 117. The bolt can abut against the first punch 102 in the radial direction of the rotating sleeve 117, thereby restricting the relative rotation of the first punch 102 and the rotating sleeve 117 and improving the stability of the first punch 102 when striking the weld toe. At the same time, the length of the first punch 102 can also be adjusted to adapt to different weld seams.

[0046] In this embodiment, four second punches 103 are provided, arranged along the circumferential direction of the mounting plate 104. A hinge plate 119 is provided between two adjacent second punches 103, and each hinge plate 119 is rotatably connected to the two adjacent second punches 103. Each second punch 103 is slidably connected to the turntable 115 along the radial direction of the turntable 115. Providing four second punches 103 increases the striking range of the second punches 103, appropriately shortens the elliptical motion path of the mounting plate 104, and appropriately reduces the volume of the lower cylinder 101, facilitating operation and use.

[0047] In this embodiment, the four second punches 103 are divided into two groups, with two punches in each group. The line connecting the two second punches 103 in each group passes through the center of the mounting plate 104. The mounting plate 104 has two sets of mounting holes 120, which are symmetrical about the center of the mounting plate 104. Each set of mounting holes 120 contains multiple holes, which are arranged radially along the mounting plate 104. Two second punches 103 in one group are threadedly connected to the mounting plate 104 through the two sets of mounting holes 120. The two sets of mounting holes 120 restrict the position of the four second punches 103. By setting multiple mounting holes 120 and adjusting the distance between the two second punches 103 in a corresponding group, the size of the elliptical path traveled by each second punch 103 is changed to accommodate welds of different widths.

[0048] In this embodiment, two rotating wheels 116 and two first punches 102 are provided. Each rotating wheel 116 is provided with a rotating sleeve 117. The two rotating wheels 116 are arranged along the first direction and respectively mesh with the turntable 115. Each first punch 102 corresponds to one rotating wheel 116, and the two first punches 102 correspond to the two weld toes of the weld. By providing two first punches 102, stress can be eliminated by comprehensively striking the weld as the mounting frame moves relative to the weld, thereby improving efficiency.

[0049] In this embodiment, the mounting frame includes a collar 121, support legs 122, and a magnetic wheel 123. The collar 121 is sleeved on the lower cylinder 101 and slidably connected to the upper cylinder 100. Bolts are provided on the collar 121, and the bolts are threadedly connected to the collar 121. The collar 121 can abut against the upper cylinder 100 in the axial direction. Two support legs 122 are provided, located on both sides of the collar 121 in the weld width direction and rotatably connected to the collar 121 respectively. The magnetic wheel 123 is rotatably mounted on the support legs 122 and contacts the plane of the weld. The magnetic wheel 123 magnetically attracts the hot-wall hydrogenation reactor, making the distance between the lower cylinder 101 and the weld relatively stable, ensuring the stress relief effect of the weld.

[0050] In this embodiment, the mounting frame 121 is provided with a second motor 124 for driving the magnetic wheel 123 to rotate. Each support leg 122 is provided with two connecting plates 125 on both sides in the weld length direction. The rotation axis of the connecting plates 125 extends along the weld length direction. The magnetic wheel 123 is connected to the support leg 122 through the connecting plates 125. The connecting plates 125 enable the magnetic wheel 123 to adapt to the surface where the weld is located, so as to adapt to the weld on different surfaces.

[0051] The working principle of the residual stress elimination device inside the hot-wall hydrogenation reactor provided in the above embodiment is as follows:

[0052] First, place the magnetic wheel 123 at the location of the weld, then align the lower cylinder 101 with the weld, then slide the upper cylinder 100 so that the second punch 103 contacts the surface of the weld. Next, rotate the bolt on the collar 121 so that it abuts against the upper cylinder 100, thus limiting the relative position of the collar 121 and the upper cylinder 100. Then, rotate the lower cylinder 101, which drives the first rotating rod and the second rotating rod to rotate, so that the two first rotating rods correspond to the two weld toes of the weld. Next, start the first motor 108, which drives the rotating plate 105 to rotate. The rotation of the rotating plate 105 drives the connecting rod 107 to rotate. The connecting rod 107 drives the slide plate 106 to slide in the slide rail 113 along the first direction, and drives the mounting plate 104 to rotate through the second slide groove 111. The mounting plate 104 starts to move in an elliptical trajectory through its connection with the slide plate 106. At the same time, the mounting plate 104 drives the second punch 103 to move synchronously. Observe the movement path of the second punch 103 and adjust the position of the second punch 103 on the mounting plate 104 so that the second punch 103 can completely cover the surface of the weld in the width direction of the weld.

[0053] Then rotate the first punch 102 relative to the brick sleeve, adjust the length of the first punch 102 so that it can contact the welding toe, and then rotate the bolt on the rotating sleeve 117 to fix the relative position of the first punch 102 and the rotating sleeve 117.

[0054] Next, the ultrasonic transducer 126 is activated. The ultrasonic transducer 126 drives the mounting plate 104 to vibrate through the push rod 127. The vibration of the mounting plate 104 drives the first punch 102 and the second punch 103 to vibrate and strike the area where the weld is located, eliminating the residual stress in the weld.

[0055] Next, the second motor 124 is started, which drives the magnetic wheel 123 to rotate. The rotation of the magnetic wheel 123 drives the upper cylinder 100 to move through the support leg 122 and the collar 121. The upper cylinder 100 moves along the length of the weld, so that the first punch 102 and the second punch 103 strike the weld they pass through. At the same time, the operator holds the handle on the upper cylinder 100 for auxiliary operation.

[0056] While the mounting plate 104 moves along an elliptical trajectory, the second punch 103 drives the turntable 115 to rotate. The rotation of the turntable 115 drives the rotating wheel 116 to rotate. The rotation of the rotating wheel 116 drives the corresponding rotating sleeve 117 and the first punch 102 to rotate. The rotation of the first punch 102 and the elliptical trajectory movement of the second punch 103 will increase the uniformity of their contact with the weld and improve their service life.

[0057] The present invention also provides a method for eliminating residual stress inside a hot-wall hydrogenation reactor, comprising the following steps:

[0058] S1. First, place the mounting bracket at the location of the weld, and align the first punch 102 with the weld toe and the second punch 103 with the surface of the weld. At this time, the magnetic wheel 123 is magnetically attracted to the inner wall of the hot wall hydrogenation reactor. Slightly adjust the position of the magnetic wheel 123 so that the two first punches 102 are facing the two weld toes of the weld, and in the direction of the magnetic wheel 123's forward movement, the two first punches 102 are positioned in front of the second punch 103.

[0059] S2. Start the drive assembly. The drive assembly controls the mounting plate 104 to slide within the main cylinder. The sliding mounting plate 104 controls the rotation of the first punch 102 and the sliding of the second punch 103 along the width direction of the weld seam via the transmission assembly. Specifically, start the first motor 108, which drives the rotating plate 105 to rotate. The rotating plate 105, through the connecting rod 107, drives the sliding plate 106 to slide along the first direction and the mounting plate 104 to slide relative to the sliding plate 106 along the second direction, causing the mounting plate 104 to move along an elliptical trajectory. The second punch 103, moving along the elliptical trajectory of the mounting plate 104, drives the rotating plate 115 to rotate. The rotating plate 115, through engagement with the rotating wheel 116, drives the first punch 102 to rotate, ensuring that the first punch 102 can fully contact the weld toe. The second punch 103 moves elliptically with the mounting plate 104, and multiple second punches 103 completely cover the width direction of the weld seam.

[0060] S3. Start the ultrasonic transducer 126. The ultrasonic transducer 126 controls the first punch 102 and the second punch 103 to strike the weld seam through the mounting plate 104.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A device for eliminating residual stress inside a hot-wall hydrogenation reactor, characterized in that, include: The system comprises a mounting frame, a main cylinder, a first punch, a second punch, an adjustment mechanism, and an ultrasonic transducer. The mounting frame is positioned on the plane of the weld and slides along the length of the weld. The main cylinder is slidably mounted on the mounting frame along its own axial direction and is perpendicular to the plane of the weld. The first and second punches are slidably mounted on the main cylinder along its axial direction and extend along the axial direction of the main cylinder. The first punch and the main cylinder are rotatably connected. The first punch contacts the weld toe of the weld, and the second punch contacts the surface of the weld. The adjustment mechanism includes a mounting plate, a drive assembly, and a transmission assembly. The mounting plate is movably mounted inside the main cylinder. The first and second punches are slidably connected to the mounting plate and abut against the mounting plate along the axial direction of the main cylinder. The drive assembly is used to drive the mounting plate to slide within the main cylinder along the width direction of the weld; the transmission assembly is used to control the rotation of the first punch and the sliding of the second punch along the width direction of the weld when the mounting plate slides; the ultrasonic transducer is used to control the vibration of the mounting plate in the axial direction of the main cylinder. The drive assembly includes a rotating plate, a sliding plate, a connecting rod, and a first motor. A horizontal plate is fixedly installed inside the main cylinder, located on the side of the mounting plate away from the weld. The rotating plate is rotatably positioned on the side of the horizontal plate close to the mounting plate. The sliding plate is slidably disposed inside the main cylinder along a first direction, located between the rotating plate and the mounting plate. The first direction is the radial direction of the main cylinder. The mounting plate is slidably connected to the sliding plate along a second direction, which is the radial direction of the main cylinder and perpendicular to the first direction. The connecting rod is Z-shaped, with one end passing through the sliding plate and connecting to the rotating plate. The connecting rod is slidably connected to the sliding plate along the second direction, and the other end of the connecting rod is rotatably connected to the mounting plate and slidably connected to the mounting plate along the first direction. The first motor is mounted on the horizontal plate and is used to drive the rotating plate to rotate.

2. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 1, characterized in that, The main cylinder includes an upper cylinder and a lower cylinder. The upper cylinder and the lower cylinder are coaxial and rotatably connected. A horizontal plate is fixedly installed in the lower cylinder. Bolts are provided on the lower cylinder. The bolts are threadedly connected to the lower cylinder and can abut against the upper cylinder in the radial direction of the upper cylinder.

3. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 2, characterized in that, The transmission assembly includes a turntable and a rotating wheel. The turntable is rotatably disposed in the lower cylinder. The turntable is coaxial with the mounting plate and is located on the side of the mounting plate closer to the weld. The second punch penetrates the turntable and is slidably connected to the turntable along the radial direction. The rotating wheel is rotatably disposed in the lower cylinder and meshes with the turntable. The rotating wheel has a rotating sleeve inside that slides along the axial direction of the rotating wheel and penetrates the rotating wheel and the lower cylinder. One end of the rotating sleeve located in the lower cylinder is slidably connected to the mounting plate and abuts against the mounting plate along the axial direction of the lower cylinder. The end of the first punch away from the weld toe is threadedly connected to the rotating sleeve, and the two are coaxial.

4. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 3, characterized in that, There are four second punches, which are arranged along the circumferential direction of the mounting plate. A hinge plate is provided between two adjacent second punches. Each hinge plate is rotatably connected to the two adjacent second punches, and each second punch is slidably connected to the turntable along the radial direction of the turntable.

5. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 4, characterized in that, The four second punches are divided into two groups, with two punches in each group. The line connecting the two second punches in each group passes through the center of the mounting plate. The mounting plate has two sets of mounting holes, which are symmetrical about the center of the mounting plate. There are multiple mounting holes in each group, and the multiple mounting holes in each group are arranged along the radial direction of the mounting plate. Two second punches in one group are threaded to the mounting plate through the two sets of mounting holes.

6. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 3, characterized in that, There are two rotating wheels and two first punches. The two rotating wheels are arranged along the first direction and mesh with the turntable respectively. Each first punch corresponds to one rotating wheel, and the two first punches correspond to the two weld toes of the weld.

7. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 2, characterized in that, The mounting frame includes a collar, legs, and a magnetic wheel. The collar is fitted over the lower cylinder and slidably connected to the upper cylinder. There are two legs, which are located on both sides of the collar in the weld width direction and are rotatably connected to the collar. The magnetic wheel is rotatably mounted on the legs and contacts the plane where the weld is located.

8. The device for eliminating residual stress inside a hot-wall hydrogenation reactor according to claim 7, characterized in that, The mounting frame is equipped with a second motor for driving the magnetic wheel to rotate. Each leg has two connecting plates that rotate on both sides along the length of the weld. The rotation axis of the connecting plates extends along the length of the weld, and the magnetic wheel is connected to the leg through the connecting plates.

9. A method for eliminating residual stress inside a hot-wall hydrogenation reactor, utilizing the residual stress elimination device for a hot-wall hydrogenation reactor as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. First, place the mounting bracket at the location of the weld, and align the first punch with the weld toe and the second punch with the surface of the weld. S2. Start the drive assembly. The drive assembly controls the mounting plate to slide inside the main cylinder. The sliding mounting plate controls the first punch to rotate and controls the second punch to slide along the width direction of the weld seam through the transmission assembly. S3. Start the ultrasonic transducer. The ultrasonic transducer controls the first and second punches to strike the weld seam through the mounting plate.

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