A kind of hardfacing integrated equipment of hydrogenation reactor cylinder section

Abstract

This invention provides an integrated welding device for hydrogenation reactor cylinder sections, relating to the field of welding technology. It includes a telescopic section, with a welding section at its actuating end. The actuating end of the telescopic section is used to move the welding section along the axial direction of the cylinder section. The welding section includes a feeding assembly, a feeding head, and a recovery assembly. The feeding assembly delivers welding strips and unused flux to the surface of the cylinder section through the feeding head. The recovery assembly's suction end recovers the used flux from the cylinder section surface and delivers the used flux back to the feeding head through its discharge end. An adjustment assembly within the feeding head can adjust the ratio of unused flux to used flux, saving flux while quantitatively supplying a higher temperature used flux to the cylinder section surface, slowing heat loss from the molten pool, and preventing excessively rapid cooling of the molten pool and the generation of thermal stress.

Description

Technical Field

[0001] This invention relates to the field of surfacing technology, and in particular to an integrated surfacing equipment for hydrogenation reactor cylinder sections. Background Technology

[0002] In the petrochemical industry, hydrogenation equipment, such as hydrogenation reactors, operates in harsh environments with high temperatures, high pressures, and corrosive media such as hydrogen sulfide. Therefore, the corrosion resistance and service life of the equipment's inner walls are crucial. Submerged arc welding (SAW) is widely used for surfacing the inner walls of hydrogenation reactors due to its high efficiency and stability. In this process, flux covers the welding area, forming a physical barrier that effectively isolates harmful gases such as oxygen and nitrogen from the weld pool. Simultaneously, the heat absorption and insulation effects of the flux slow down the cooling rate of the weld pool, preventing excessive temperature drop and thermal stress, thus ensuring weld quality. The contact tip, as a key component of the wire feeding system, is often used in conjunction with flux on the workpiece surface to maintain stable arc combustion and the continuity of the deposition process. High-efficiency surfacing methods such as preheating electrodes are also gradually being adopted, further improving surfacing efficiency by optimizing heat input.

[0003] In submerged arc welding, if the initial temperature of the flux used is too low, it will accelerate the heat loss of the molten pool, resulting in excessively fast cooling of the molten pool and the generation of thermal stress.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide an integrated welding equipment for hydrogenation reactor cylinder sections to address the problems existing in current submerged arc welding equipment.

[0006] The above objectives are achieved through the following technical solutions:

[0007] An integrated welding device for a hydrogenation reactor section includes a rotating part and a telescopic part. The rotating part drives the section to rotate circumferentially, and the telescopic part has a welding part at its actuating end, which moves the welding part along the axial direction of the section. The welding part includes a feeding assembly, a feeding head, and a recovery assembly. The feeding assembly feeds welding strip and unused flux to the surface of the section through the feeding head. The recovery assembly has a suction end and a discharge end. The suction end of the recovery assembly is used to recover the used flux from the surface of the section, and the discharge end of the recovery assembly delivers the used flux to the feeding head. The feeding head is equipped with an adjusting assembly, which is used to adjust the ratio of unused flux to used flux in the feeding head, and the sum of the weights of unused flux and used flux in the feeding head is a first preset value.

[0008] Furthermore, the solder strip is disposed vertically within the feeding head. The adjusting component includes a separator sleeve disposed between the solder strip and the feeding head. An inner chamber is formed between the solder strip and the separator sleeve, and an outer chamber is formed between the separator sleeve and the feeding head. The discharge end of the recovery component conveys the used flux to the inner chamber, and the feeding component conveys the unused flux to the outer chamber.

[0009] Furthermore, the inner chamber has a first inlet and the outer chamber has a second inlet. The discharge end of the recovery component delivers the used flux to the inner chamber through the first inlet, and the feeding component delivers the unused flux to the outer chamber through the second inlet. The cross-sectional area of ​​the first inlet is negatively correlated with the cross-sectional area of ​​the second inlet.

[0010] Furthermore, the separator sleeve can move up and down relative to the feed head. A first elastic element is provided between the separator sleeve and the feed head. The first elastic element is used to make the separator sleeve tend to move upward. A discharge pipe is provided between the discharge end of the recycling component and the inner chamber. When the weight of the flux used in the discharge pipe is greater than or equal to a second preset value, the separator sleeve moves downward relative to the feed head, thereby increasing the cross-sectional area of ​​the first feed port and decreasing the cross-sectional area of ​​the second feed port.

[0011] Furthermore, a first connector connected to the discharge pipe is formed on the separating sleeve, a first adjusting plate is provided on the feeding head, and a first feed port is formed between the first connector and the first adjusting plate; a second connector connected to the feeding assembly is formed on the feeding head, a second adjusting plate is provided on the separating sleeve, and a second feed port is formed between the second connector and the second adjusting plate; when the separating sleeve moves up and down relative to the feeding head, the first adjusting plate and the first connector move relative to each other to change the cross-sectional area of ​​the first feed port, and at the same time the second adjusting plate and the second connector move relative to each other to change the cross-sectional area of ​​the second feed port.

[0012] Furthermore, the telescopic part is provided with a mounting bracket at its moving end, and the feeding head can move up and down relative to the mounting bracket. A second elastic element is provided between the mounting bracket and the feeding head, and the second elastic element has a tendency to move the feeding head upward. When the weight of the flux used in the discharge pipe is greater than or equal to a third preset value, the feeding head moves downward relative to the mounting bracket to reduce the first preset value and make the third preset value greater than the second preset value.

[0013] Furthermore, a first guide ring is provided in the inner cavity, the first guide ring is lower than the first feed inlet, and the upper surface of the first guide ring is inclined from top to bottom and from near to far from the first feed inlet; a second guide ring is provided in the outer cavity, the second guide ring is lower than the second feed inlet, and the upper surface of the second guide ring is inclined from top to bottom and from near to far from the second feed inlet.

[0014] Furthermore, the recycling assembly also has an exhaust end, which faces the welded area on the surface of the cylinder section.

[0015] Furthermore, the recycling component includes a suction pipe and a second exhaust pipe. The suction pipe is connected to the suction end of the recycling component, and the second exhaust pipe is connected to the exhaust end of the recycling component. The suction pipe is inserted into the second exhaust pipe.

[0016] Furthermore, a guide plate is provided at the end of the suction pipe, which is used to regulate the flux that has been used.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) The suction end of the recovery component recovers the flux used on the surface of the cylinder section, and the discharge end of the recovery component delivers the used flux to the feed head. At the same time, the adjustment component in the feed head can adjust the ratio of unused flux to used flux in the feed head, thereby saving flux and quantitatively providing the surface of the cylinder section with the used flux at a higher temperature, slowing down the heat loss of the molten pool, and avoiding the molten pool cooling too fast and generating thermal stress.

[0019] (2) The discharge end of the recycling component delivers the used flux to the inner chamber, and the feeding component delivers the unused flux to the outer chamber, so that the feed head contains the solder strip, the used flux and the unused flux in sequence from the inside to the outside. This allows the used flux to contact the molten pool first, and the unused flux to contact the molten pool later, further slowing down the heat loss of the molten pool and avoiding the molten pool cooling too fast and generating thermal stress.

[0020] (3) Since the downward pressure applied to the feed head without flux is constant, when the weight of the flux used in the discharge pipe is greater than or equal to the third preset value, it indicates that the amount of flux recovered is large and the flux feeding speed of the feed head is large. At this time, the downward force applied by the feed head to the second elastic element increases, and the feed head can move downward relative to the mounting frame, that is, the feed head is closer to the surface of the cylinder section, thereby reducing the flux feeding speed of the feed head, thereby reducing the first preset value, avoiding excessive pressure on the molten pool caused by excessive flux accumulation at the molten pool, thereby alleviating stress concentration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the integrated welding equipment for hydrogenation reactor cylinder sections provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Side view;

[0023] Figure 3 for Figure 1 Schematic diagram of the expansion joint and welded section;

[0024] Figure 4 for Figure 3A magnified view of a section at point A in the middle;

[0025] Figure 5 for Figure 3 The front view;

[0026] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;

[0027] Figure 7 for Figure 5 CC-direction sectional view;

[0028] Figure 8 for Figure 7 A magnified view of a section at point D;

[0029] Figure 9 for Figure 3 Side view;

[0030] Figure 10 for Figure 9 EE-directed sectional view;

[0031] Figure 11 for Figure 10 A magnified view of a section at point F in the middle;

[0032] Figure 12 This is a structural diagram of the feed head and the separator sleeve;

[0033] Figure 13 for Figure 12 Exploded view of the parts;

[0034] Figure 14 for Figure 12 A diagram from another perspective;

[0035] Figure 15 for Figure 14 Exploded view of the parts;

[0036] Figure 16 This is a schematic diagram of the separator sleeve structure;

[0037] Figure 17 for Figure 16 The front view.

[0038] in:

[0039] 101. Rotating part; 102. Cylindrical section; 103. Telescopic part; 104. Feeding assembly; 105. Recycling assembly; 106. Hopper; 107. Reel; 108. Shell; 109. Guide wheel; 110. Cyclone separator; 111. Vacuum pump; 112. First exhaust pipe; 113. Discharge pipe; 114. Suction pipe; 115. Second exhaust pipe; 116. Pipeline;

[0040] 201. Feed head; 202. Separator sleeve; 203. Inner chamber; 204. Outer chamber; 205. First elastic element; 206. First support; 207. Second support; 208. First connector; 209. First adjusting plate; 210. Second connector; 211. Second adjusting plate; 212. Through hole; 213. Slot; 214. Side groove; 215. Mounting bracket; 216. Second elastic element; 217. First guide ring; 218. Second guide ring; 219. Guide plate. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] like Figures 1 to 17As shown, this embodiment of the invention provides an integrated welding device for hydrogenation reactor sections, including a rotating part 101 and a telescopic part 103. The rotating part 101 is used to drive the section 102 to rotate circumferentially. The moving end of the telescopic part 103 is provided with a welding part, which is used to move the welding part along the axial direction of the section 102. The welding part includes a feeding assembly 104, a feeding head 201, and a recovery assembly 105. The feeding assembly 104 feeds the welding material to the surface of the section 102 through the feeding head 201. The recycling component 105 has a suction end and a discharge end. The suction end of the recycling component 105 is used to recycle the used flux on the surface of the cylinder section 102, and the discharge end of the recycling component 105 is used to transport the used flux to the feed head 201. The feed head 201 is provided with an adjustment component, which is used to adjust the ratio of unused flux to used flux in the feed head 201, and the sum of the weights of unused flux and used flux in the feed head 201 is a first preset value.

[0045] The suction end of the recovery component 105 recovers the flux used on the surface of the cylinder section 102, and the discharge end of the recovery component 105 delivers the used flux to the feed head 201. At the same time, the adjustment component in the feed head 201 can adjust the ratio of unused flux to used flux in the feed head 201, thereby saving flux and quantitatively providing the surface of the cylinder section 102 with a higher temperature of used flux, slowing down the heat loss of the molten pool, and avoiding the generation of thermal stress due to the excessively fast cooling rate of the molten pool.

[0046] Among them, see Figure 1 and Figure 2 The rotating part 101 is fixed to the ground and includes multiple opposing rollers. The roller axes are parallel to the axis of the cylindrical section 102. The rollers are located on both sides below the cylindrical section 102, and are divided into driving rollers and driven rollers. The driving rollers are controlled by a motor and a control module to start, stop, and rotate, thereby supporting the cylindrical section 102 and driving it to rotate circumferentially. The telescopic part 103 is fixed to the ground and can be a hydraulic telescopic structure. The actuating end of the telescopic part 103 is parallel to the axis of the cylindrical section 102, allowing the welding part to move axially along the cylindrical section 102 for feeding motion. See also... Figure 4 The telescopic part 103 has a mounting bracket 215 at its moving end, and the welding part is mounted on the mounting bracket 215. The feeding assembly 104 includes a hopper 106 and a tape reel 107. The hopper 106 stores unused flux. The feeding head 201 has a cavity inside and an opening at the lower end for discharging. When in use, both flux and welding strip (electrode) are output from the feeding head 201 to the welding station. At the same time, the welding strip is connected to the negative terminal of the power supply, and the cylinder section 102 is connected to the positive terminal of the power supply. Figure 4 , Figure 8 and Figure 11The reel 107 is rotatably mounted on the mounting frame 215. Welding strip is wound and stored on the reel 107. A strip housing 108 is inserted into the feed head 201 from top to bottom, with the lower end of the housing 108 protruding from the lower end of the feed head 201. Multiple guide wheels 109 are evenly spaced from top to bottom inside the housing 108, and these guide wheels 109 are arranged in pairs on both sides of the welding strip. One pair of guide wheels 109 are driving wheels, and the other guide wheels 109 are driven wheels. The driving wheels are controlled by a motor and a control module to start, stop, and rotate. The structure and working principle of the rotating part 101, the telescopic part 103, and the welding strip described above are all prior art, and will not be elaborated upon in this application.

[0047] The recovery component 105 includes a cyclone separator 110 and a vacuum pump 111. The cyclone separator 110 is a static device that uses centrifugal force for gas-solid or gas-liquid separation. Under the action of the vacuum pump 111, the used flux and air mix and enter the upper part of the separator at high speed tangentially from the suction end. The airflow rotates at high speed along the inner wall of the cylinder, forming an outer swirling airflow. The used flux is thrown against the cylinder wall under the action of centrifugal force and loses kinetic energy. Under the combined action of gravity and downward airflow, it spirals down along the inner wall of the cone and is finally discharged from the discharge end at the bottom into the feed head 201. After reaching the bottom of the cone, the outer swirling airflow is forced to form an upward inner swirling airflow. This gas has been purified and is connected to the input end of the vacuum pump 111 through the first exhaust pipe 112 at the top. The vacuum pump 111 discharges this gas during operation. The structure and working principle of the cyclone separator 110 and the vacuum pump 111 are existing technologies and will not be described in detail in this application.

[0048] It is understandable that during use, some flux reacts with the welding strip to form a molten pool, while flux far from the molten pool still provides some protection and thus retains some value. This application appropriately recycles and reuses the used flux, saving resources while quantitatively supplying a higher temperature flux to the surface of the cylinder section 102, slowing down heat loss from the molten pool and achieving a heat preservation effect. Furthermore, the sum of the weight of unused flux and used flux in the feed head 201 is a first preset value, i.e., a fixed value. In other words, the flux feeding speed of the feed head 201 is set before the welding process. Since used flux is replenished into the feed head 201, the amount of unused flux used needs to be reduced accordingly.

[0049] In one embodiment, see Figure 8 and Figure 11The welding strip is disposed vertically within the feed head 201. The adjustment component includes a separator sleeve 202 disposed between the welding strip and the feed head 201. An inner chamber 203 is formed between the welding strip and the separator sleeve 202, and an outer chamber 204 is formed between the separator sleeve 202 and the feed head 201. The discharge end of the recovery component 105 conveys the used flux to the inner chamber 203, and the feed component 104 conveys the unused flux to the outer chamber 204.

[0050] The discharge end of the recycling component 105 delivers the used flux to the inner chamber 203, and the feeding component 104 delivers the unused flux to the outer chamber 204. This results in the feeding head 201 containing, from the inside out, solder strip, used flux, and unused flux. This ensures that the used flux contacts the molten pool first, while the unused flux contacts the molten pool later, further slowing down the heat loss from the molten pool and preventing the molten pool from cooling too quickly and generating thermal stress.

[0051] Among them, see Figures 12 to 17 The separator sleeve 202 is a sleeve-shaped structure with openings at both the top and bottom. The separator sleeve 202 is disposed vertically between the housing 108 and the feed head 201. The cross-sectional shape of the separator sleeve 202 matches the cross-sectional shapes of the housing 108 and the feed head 201. Preferably, the cross-sectional shape of the separator sleeve 202, the housing 108, and the feed head 201 are all square rings. More preferably, both the housing 108 and the feed head 201 include a straight cylindrical section and a conical section disposed vertically. The internal dimensions of the straight cylindrical section remain consistent from top to bottom, while the internal dimensions of the conical section gradually decrease from top to bottom, to more accurately deliver the welding strip and flux to the surface of the cylindrical section 102.

[0052] In one embodiment, the inner chamber 203 has a first inlet and the outer chamber 204 has a second inlet. The discharge end of the recovery component 105 delivers the used flux to the inner chamber 203 through the first inlet, and the feeding component 104 delivers the unused flux to the outer chamber 204 through the second inlet. The cross-sectional area of ​​the first inlet is negatively correlated with the cross-sectional area of ​​the second inlet.

[0053] The cross-sectional area of ​​the first feed port is negatively correlated with the cross-sectional area of ​​the second feed port. When the cross-sectional area of ​​the first feed port increases, the cross-sectional area of ​​the second feed port decreases, so that when the flux used in the feed head 201 increases, the unused flux in the feed head 201 decreases; when the cross-sectional area of ​​the first feed port decreases, the cross-sectional area of ​​the second feed port increases, so that when the flux used in the feed head 201 decreases, the unused flux in the feed head 201 increases, thereby adjusting the ratio of unused flux to used flux in the feed head 201.

[0054] In one embodiment, the separator sleeve 202 is movable vertically relative to the feed head 201, and a first elastic member 205 is provided between the separator sleeve 202 and the feed head 201. The first elastic member 205 is used to give the separator sleeve 202 an upward tendency; see also Figure 7 and Figure 8 A discharge pipe 113 is provided between the discharge end of the recycling component 105 and the inner chamber 203. When the weight of the flux used in the discharge pipe 113 is greater than or equal to the second preset value, the separator sleeve 202 moves downward relative to the feed head 201, thereby increasing the cross-sectional area of ​​the first feed port and decreasing the cross-sectional area of ​​the second feed port.

[0055] When the weight of the flux used in the discharge pipe 113 is greater than or equal to the second preset value, the separator sleeve 202 moves downward relative to the feed head 201, increasing the cross-sectional area of ​​the first feed inlet and decreasing the cross-sectional area of ​​the second feed inlet; when the weight of the flux used in the discharge pipe 113 is less than the second preset value, the separator sleeve 202 moves upward relative to the feed head 201, decreasing the cross-sectional area of ​​the first feed inlet and increasing the cross-sectional area of ​​the second feed inlet, thereby automatically adjusting the amount of unused flux according to the amount of flux recovered.

[0056] It is worth noting that the end of the discharge pipe 113 near the feed head 201 is a flexible hose, allowing the weight of the flux already applied inside the discharge pipe 113 to act on the separator sleeve 202, causing the separator sleeve 202 to move downwards relative to the feed head 201. See also Figures 12 to 17 The first elastic element 205 is a compression spring, the separator sleeve 202 forms a first support 206 outward, the side wall of the feed head 201 is provided with a sliding groove for the first support 206 to move up and down, the feed head 201 is provided with a second support 207 outside the feed head 201, the first support 206 is higher than the second support 207 and the first elastic element 205 is disposed between the two.

[0057] In other embodiments not shown, two valves can be installed at the first feed inlet and the second feed inlet respectively. The opening and closing ratio of the two valves can be controlled by a PLC according to the amount of flux recovered. This can also adjust the ratio of unused flux to used flux in the feed head 201.

[0058] In one embodiment, see Figure 8 as well as Figures 12 to 17The separator sleeve 202 has a first connector 208 connected to the discharge pipe 113. The feed head 201 is provided with a first adjusting plate 209, and a first feed inlet is formed between the first connector 208 and the first adjusting plate 209. The feed head 201 has a second connector 210 connected to the feed assembly 104. The separator sleeve 202 is provided with a second adjusting plate 211, and a second feed inlet is formed between the second connector 210 and the second adjusting plate 211. When the separator sleeve 202 moves up and down relative to the feed head 201, the first adjusting plate 209 moves relative to the first connector 208 to change the cross-sectional area of ​​the first feed inlet. At the same time, the second adjusting plate 211 moves relative to the second connector 210 to change the cross-sectional area of ​​the second feed inlet.

[0059] When the separator sleeve 202 moves up and down relative to the feed head 201, the first adjusting plate 209 moves relative to the first connector 208, and the area of ​​the first adjusting plate 209 blocking the first feed inlet changes, thereby changing the cross-sectional area of ​​the first feed inlet. At the same time, the second adjusting plate 211 moves relative to the second connector 210, and the area of ​​the second adjusting plate 211 blocking the second feed inlet changes, thereby changing the cross-sectional area of ​​the second feed inlet.

[0060] The first connector 208 has an internal passage for the flow of used flux. The first adjusting plate 209 is part of the side wall of the feed head 201. The first adjusting plate 209 has a through hole 212. The size and shape of the through hole 212 correspond to the size and shape of the internal passage of the first connector 208. The used flux enters the internal passage and through hole 212 of the first connector 208 through the discharge pipe 113 and then enters the inner chamber 203. The first connector 208 has a slot 213 from top to bottom, so that the first adjusting plate 209 can be inserted into the slot 213 and move along it. When the separator sleeve 202 moves downward relative to the feed head 201, the first connector 208 moves downward relative to the first adjusting plate 209. The overlapping area of ​​the through hole 212 and the internal passage of the first connector 208 gradually increases, that is, the cross-sectional area of ​​the first feed port gradually increases. Similarly, the second connector 210 has a passage for the flow of unused flux inside. The second adjusting plate 211 is part of the side wall of the partition sleeve 202. The first adjusting plate 209 has a side groove 214. The size and shape of the side groove 214 correspond to the size and shape of the passage inside the second connector 210. Unused flux enters the passage inside the second connector 210 from the hopper 106, and then enters the outer chamber 204 after passing through the side groove 214. When the partition sleeve 202 moves downward relative to the feed head 201, the second adjusting plate 211 moves downward relative to the second connector 210. The overlapping area of ​​the side groove 214 and the passage inside the second connector 210 gradually decreases, that is, the cross-sectional area of ​​the second feed port gradually decreases.

[0061] In this embodiment, the first feed port and the second feed port are located on both sides of the feed head 201. Therefore, the first connector 208 is located on the separator sleeve 202, and the second connector 210 is located on the feed head 201. The feed head 201 is provided with a first adjusting plate 209, and the separator sleeve 202 is provided with a second adjusting plate 211. This allows the cross-sectional area of ​​the first feed port to be increased and the cross-sectional area of ​​the second feed port to be decreased when the separator sleeve 202 moves downward relative to the feed head 201.

[0062] In other embodiments not shown, the first and second feed inlets can both be located on the same side of the feed head 201, the first connector 208 and the second connector 210 are both located on the feed head 201, and the first adjusting plate 209 and the second adjusting plate 211 are both located on the partition sleeve 202. Specifically, the partition sleeve 202 has two upper and lower holes on its side wall, corresponding to the first connector 208 and the second connector 210, respectively. Initially, the upper hole is completely offset from the first connector 208, that is, the cross-sectional area of ​​the first feed inlet is the smallest, and the lower hole is completely opposite to the second connector 210, that is, the cross-sectional area of ​​the second feed inlet is the largest. At this time, there is no used flux in the feed head 201, and the amount of unused flux is the largest. When the partition sleeve 202 moves downward relative to the feed head 201, the upper hole gradually becomes opposite to the first connector 208, and the lower hole gradually becomes offset from the second connector 210, thereby changing the cross-sectional area of ​​the first and second feed inlets.

[0063] In one embodiment, the actuating end of the telescopic part 103 is provided with a mounting bracket 215, and the feeding head 201 can move up and down relative to the mounting bracket 215. A second elastic member 216 is provided between the mounting bracket 215 and the feeding head 201. The second elastic member 216 has a tendency to move the feeding head 201 upward. When the weight of the flux used in the discharge pipe 113 is greater than or equal to a third preset value, the feeding head 201 moves downward relative to the mounting bracket 215 to reduce the first preset value and make the third preset value greater than the second preset value.

[0064] During submerged arc welding, if too much flux accumulates in the molten pool, the flux's own weight will exert pressure on the molten pool, easily causing stress concentration. To solve the above problems, this application maintains a constant downward pressure on the feed head 201 without flux. When the weight of the used flux in the discharge pipe 113 is greater than or equal to the third preset value, it indicates that the amount of used flux recovered is large, and the flux feeding speed of the feed head 201 is large. At this time, the downward force exerted by the feed head 201 on the second elastic element 216 increases, and the feed head 201 can move downward relative to the mounting bracket 215, that is, the feed head 201 is closer to the surface of the cylinder section 102, thereby reducing the flux feeding speed of the feed head 201, thus reducing the first preset value and preventing excessive flux accumulation in the molten pool.

[0065] The second and third preset values ​​both represent the weight of the used flux in the discharge pipe 113, while the first preset value represents the sum of the weight of the unused flux and the used flux in the feed head 201. Therefore, the second and third preset values ​​are not directly related to the first preset value, and their relative magnitudes are not limited in this application.

[0066] In one embodiment, see Figure 8 The inner chamber 203 is provided with a first guide ring 217, which is lower than the first feed inlet, and the upper surface of the first guide ring 217 is inclined from top to bottom and from near to far from the first feed inlet; the outer chamber 204 is provided with a second guide ring 218, which is lower than the second feed inlet, and the upper surface of the second guide ring 218 is inclined from top to bottom and from near to far from the second feed inlet.

[0067] The used flux entering the inner chamber 203 through the first feed port is evenly distributed around the circumference of the inner chamber 203 and falls under the guidance of the first guide ring 217. Similarly, the unused flux entering the outer chamber 204 through the second feed port is evenly distributed around the circumference of the outer chamber 204 and falls under the guidance of the second guide ring 218.

[0068] The first guide ring 217 is disposed on the inner wall of the separator sleeve 202, and there is a gap between the inner side of the first guide ring 217 and the housing 108 to allow the used flux to move downward; the second guide ring 218 is disposed on the inner wall of the feed head 201, and there is a gap between the inner side of the second guide ring 218 and the separator sleeve 202 to allow the unused flux to move downward.

[0069] In one embodiment, the recovery assembly 105 also has an exhaust end facing the welded area on the surface of the cylinder section 102.

[0070] The suction end of the recycling component 105 recovers the flux used at the welding station. Since the used flux has a certain temperature, hot air with a certain temperature can be blown to the welded area on the surface of the cylinder section 102 through the exhaust end to further slow down the heat loss of the molten pool and avoid the molten pool cooling too fast and generating thermal stress.

[0071] The exhaust end of the recovery component 105 is the output end of the vacuum pump 111.

[0072] In one embodiment, see Figure 7 and Figure 8 The recycling component 105 includes a suction pipe 114 and a second exhaust pipe 115. The suction pipe 114 is connected to the suction end of the recycling component 105, and the second exhaust pipe 115 is connected to the exhaust end of the recycling component 105. The suction pipe 114 is inserted into the second exhaust pipe 115.

[0073] The suction pipe 114 and the second exhaust pipe 115 are nested inside and outside, so that the suction pipe 114 and the second exhaust pipe 115 face the same place on the surface of the cylinder section 102 where the welding area has been welded, so that the recovery of used flux and the discharge of hot air are carried out simultaneously at the same place on the surface of the cylinder section 102 where the welding area has been welded.

[0074] The cyclone separator 110 is connected to the suction pipe 114 at the suction end, and the vacuum pump 111 is connected to the second exhaust pipe 115 at the output end via pipe 116.

[0075] In one embodiment, the end of the suction pipe 114 is provided with a guide plate 219, which is used to regulate the flux that has been used.

[0076] The guide plate 219 has an inner hole in the center. The used flux is sucked in by the suction pipe 114 through the inner hole. At the same time, the guide plate 219 organizes the used flux so that the flux is evenly distributed in the molten pool, further avoiding excessive local accumulation of flux.

[0077] The working principle of this invention is as follows:

[0078] The cylindrical section 102 is placed on a plurality of oppositely arranged rollers. The actuating end of the telescopic part 103 causes the welding part to move along the axial direction of the cylindrical section 102 for feeding motion. The pulley 107 and the guide wheel 109 transport the welding strip from top to bottom into the pulley shell 108. The hopper 106 transports unused flux through the second connector 210 to the outer chamber 204 of the feed shell, so that the welding strip moves out from the center of the feed head 201. The unused flux flows downward from the outside of the feed head 201. The welding strip is connected to the negative terminal of the power supply, and the cylindrical section 102 is connected to the positive terminal of the power supply. The rotation of the rollers can drive the cylindrical section 102 to rotate around its circumference to start the submerged arc welding process.

[0079] Vacuum pump 111 provides power to cyclone separator 110. Cyclone separator 110 draws in used flux from the welding station through suction pipe 114. The used flux mixes with air and enters cyclone separator 110. After separation, the gas with a certain temperature enters vacuum pump 111 through first exhaust pipe 112 and is blown onto the welded area on the surface of cylinder section 102 through second exhaust pipe 115 to slow down heat loss from the molten pool and prevent thermal stress caused by excessive cooling of the molten pool. At the same time, the separated used flux is sent to first joint 208 through discharge pipe 113 of cyclone separator 110, then enters inner chamber 203 and flows downwards to be discharged. This saves flux while quantitatively providing high-temperature used flux to the surface of cylinder section 102, further slowing down heat loss from the molten pool and preventing thermal stress caused by excessive cooling of the molten pool. In addition, the used flux comes into contact with the molten pool first, while the unused flux comes into contact with the molten pool later, which further slows down the heat loss of the molten pool and avoids the molten pool cooling too quickly and generating thermal stress.

[0080] During submerged arc welding, the adjusting component inside the feed head 201 can adjust the ratio of unused flux to used flux inside the feed head 201. Specifically, the separated used flux enters the internal passage of the first joint 208 through the discharge pipe 113, and then enters the inner chamber 203 through the through hole 212. The unused flux enters the internal passage of the second joint 210 through the hopper 106, and then enters the outer chamber 204 through the side groove 214. When the weight of the flux used in the discharge pipe 113 is greater than or equal to the second preset value, the separator sleeve 202 moves downward relative to the feed head 201, the first connector 208 moves downward relative to the first adjusting plate 209, the overlapping area of ​​the through hole 212 and the internal passage of the first connector 208 gradually increases, that is, the cross-sectional area of ​​the first feed port gradually increases, and the flux used in the feed head 201 increases; at the same time, the second adjusting plate 211 moves downward relative to the second connector 210, the overlapping area of ​​the side groove 214 and the internal passage of the second connector 210 gradually decreases, that is, the cross-sectional area of ​​the second feed port gradually decreases, and the unused flux in the feed head 201 decreases, thereby automatically adjusting the ratio of unused flux to used flux according to the amount of used flux recovered.

[0081] During submerged arc welding, since the downward pressure applied to the feed head 201 without flux is constant, when the weight of the used flux in the discharge pipe 113 is greater than or equal to the third preset value, it indicates that the amount of used flux recovered is large, and the flux feeding speed of the feed head 201 is large. At this time, the downward force applied by the feed head 201 to the second elastic element 216 increases, and the feed head 201 can move downward relative to the mounting bracket 215, that is, the feed head 201 is closer to the surface of the cylinder section 102, thereby reducing the flux feeding speed of the feed head 201, thereby reducing the first preset value, avoiding excessive pressure on the molten pool caused by excessive flux accumulation at the molten pool, thereby alleviating stress concentration.

[0082] 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.

[0083] 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. An integrated welding and overlay equipment for hydrogenation reactor cylinder sections, characterized in that, It includes a rotating part and a telescopic part. The rotating part is used to drive the cylinder section to rotate circumferentially. The telescopic part has a welding part at its moving end, which is used to move the welding part along the axial direction of the cylinder section. The welding section includes a feeding assembly, a feeding head, and a recovery assembly. The feeding assembly feeds welding strip and unused flux onto the surface of the cylinder section through the feeding head. The recovery assembly has a suction end and a discharge end. The suction end of the recovery assembly is used to recover the used flux from the surface of the cylinder section, and the discharge end of the recovery assembly delivers the used flux back into the feeding head. The feeding head is equipped with an adjustment assembly, which is used to adjust the ratio of unused flux to used flux in the feeding head, and the sum of the weights of unused flux and used flux in the feeding head is a first preset value. The welding strip is installed through the feed head from top to bottom. The adjustment component includes a partition sleeve installed between the welding strip and the feed head. An inner chamber is formed between the welding strip and the partition sleeve, and an outer chamber is formed between the partition sleeve and the feed head. The discharge end of the recovery component delivers the used flux to the inner chamber, and the feeding component delivers the unused flux to the outer chamber. The inner chamber has a first inlet and the outer chamber has a second inlet. The discharge end of the recovery component delivers the used flux to the inner chamber through the first inlet, and the feeding component delivers the unused flux to the outer chamber through the second inlet. The cross-sectional area of ​​the first inlet is negatively correlated with the cross-sectional area of ​​the second inlet.

2. The integrated welding equipment for hydrogenation reactor cylinder sections according to claim 1, characterized in that, The separator sleeve can move up and down relative to the feed head. A first elastic element is provided between the separator sleeve and the feed head. The first elastic element is used to make the separator sleeve have an upward tendency. A discharge pipe is provided between the discharge end of the recycling component and the inner chamber. When the weight of the flux used in the discharge pipe is greater than or equal to the second preset value, the separator sleeve moves downward relative to the feed head, thereby increasing the cross-sectional area of ​​the first feed port and decreasing the cross-sectional area of ​​the second feed port.

3. The integrated welding equipment for hydrogenation reactor cylinder sections according to claim 2, characterized in that, A first connector connected to a discharge pipe is formed on the separating sleeve, a first adjusting plate is provided on the feeding head, and a first inlet is formed between the first connector and the first adjusting plate; a second connector connected to a feeding assembly is formed on the feeding head, a second adjusting plate is provided on the separating sleeve, and a second inlet is formed between the second connector and the second adjusting plate. When the separator sleeve moves up and down relative to the feed head, the first adjusting plate moves relative to the first connector to change the cross-sectional area of ​​the first feed inlet. At the same time, the second adjusting plate moves relative to the second connector to change the cross-sectional area of ​​the second feed inlet.

4. The integrated welding equipment for hydrogenation reactor cylinder sections according to claim 2, characterized in that, The telescopic part has a mounting frame at its moving end, and the feeding head can move up and down relative to the mounting frame. A second elastic element is provided between the mounting frame and the feeding head, and the second elastic element has a tendency to move the feeding head upward. When the weight of the flux already used in the discharge pipe is greater than or equal to the third preset value, the feed head moves downward relative to the mounting bracket to reduce the first preset value and make the third preset value greater than the second preset value.

5. The integrated welding equipment for hydrogenation reactor cylinder sections according to claim 1, characterized in that, The inner cavity is provided with a first guide ring, which is lower than the first feed inlet, and the upper surface of the first guide ring is inclined from top to bottom and from near to far from the first feed inlet; the outer cavity is provided with a second guide ring, which is lower than the second feed inlet, and the upper surface of the second guide ring is inclined from top to bottom and from near to far from the second feed inlet.

6. The integrated welding equipment for hydrogenation reactor cylinder sections according to any one of claims 1 to 5, characterized in that, The recycling assembly also has an exhaust end, which faces the welded area on the surface of the cylinder section.

7. The integrated welding equipment for hydrogenation reactor cylinder sections according to claim 6, characterized in that, The recycling component includes a suction pipe and a second exhaust pipe. The suction pipe is connected to the suction end of the recycling component, and the second exhaust pipe is connected to the exhaust end of the recycling component. The suction pipe is inserted into the second exhaust pipe.

8. The integrated welding equipment for hydrogenation reactor cylinder sections according to claim 7, characterized in that, The end of the suction pipe is equipped with a guide plate, which is used to organize the used flux.

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