A sealing welding device for the metal shell of an atmosphere industrial furnace

Abstract

The present invention relates to the field of kiln welding technology, and specifically to a sealing welding device for a metal furnace shell of an atmosphere industrial kiln, comprising a robot and a welding head; a cleaning unit is arranged around the welding head, the cleaning unit comprises two brackets, the two brackets are symmetrically arranged on both sides of the welding head around the welding head, and the two brackets rotate synchronously around the welding head around the axis of the welding head, a first driving unit is hinged on the bracket, a cleaning roller is arranged on the driving end of the first driving unit, the cleaning roller rotates synchronously with the first driving unit, and an angle monitoring device for monitoring the rotation angle of the first driving unit is arranged on the upper part of the first driving unit, the angle monitoring device is preset with a minimum angle, and when the first driving unit rotates to the minimum angle, the first driving unit starts. The present invention ensures that the interior of the furnace shell can be completely cleaned after welding is completed, thereby improving the welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of kiln welding, and in particular to a sealing welding device for a metal furnace shell of an atmosphere industrial kiln. Background Art

[0002] When welding the furnace body, it is crucial to ensure that the furnace body is in a stable state. During welding, a crane is generally used for hoisting, positioning and adjustment, and it is necessary to ensure that the joint surface of the flange and the furnace body fits. This positioning method is not only inconvenient during operation, but also has a poor positioning effect, which affects the efficiency and effect of welding. In addition, impurities are easily adhered to the welding point between the flange and the furnace body. If it is not cleaned, it will also affect the quality of welding.

[0003] Chinese patent CN115781093B discloses a gas industrial furnace shell welding device, including a base plate, a welding robot, a furnace body and a flange, the upper side wall of the base plate is provided with a supporting mechanism for supporting the furnace body and the flange, and the upper side wall of the base plate is provided with an adjusting mechanism for aligning the furnace body and the flange; the adjusting mechanism includes a U-shaped plate fixedly connected to the upper side wall of the base plate, and the side wall of the U-shaped plate is connected to two symmetrically arranged moving plates through a moving mechanism, the side wall of each of the moving plates is fixedly connected to a plurality of groups of symmetrically arranged fixed blocks, and the side walls of each group of fixed blocks are rotatably connected to rollers through a rotating shaft, the side wall of one of the fixed blocks is fixedly connected to a first motor, and the output end of the first motor is fixed to one end of the rotating shaft, the side wall of each of the moving plates is provided with a cleaning mechanism for cleaning the weld, and the upper side wall of the base plate is provided with a pushing mechanism for pushing the furnace body and the flange to fit.

[0004] The above scheme is mainly for welding furnace bodies with cylindrical structures to improve the stability of the furnace body during welding. However, not all furnace bodies are cylindrical structures. For example, an atmosphere industrial kiln is a square structure with an opening usually provided on one side. According to welding requirements, the atmosphere industrial kiln needs to weld not only the outer side of the kiln but also the inner side of the kiln during welding. In this way, welding residues will remain inside the industrial atmosphere kiln. The existing brush cannot clean the residues remaining inside the kiln, and after welding, the welding position needs to be observed again. However, some positions after welding will be blocked by residues. If a brush is used directly for cleaning, the residues will be swept away and cannot be discharged. If a vacuum cleaning device is used, the residues remaining at the welding position after welding cannot be cleaned. If the two are combined, the cleaning device cannot be operated at the same time as the welding device, that is, due to the small opening of the industrial atmosphere kiln, the cleaning device and the welding device cannot enter the industrial atmosphere kiln from the opening at the same time. Summary of the invention

[0005] In view of the above problems, a sealing welding device for the metal furnace shell of an atmosphere industrial furnace is provided. By arranging cleaning rollers on both sides of the welding head, the welding head and the cleaning unit are combined, and the status of the two cleaning rollers is monitored by an angle monitoring device to determine whether the two cleaning rollers are in the cleaning position, thereby ensuring that the cleaning rollers can clean the debris. At the same time, the dust suction port and the fan can absorb the cleaned debris, ensuring that the inside of the furnace shell can be completely cleaned after welding is completed, thereby improving the welding quality.

[0006] In order to solve the problems of the prior art, the present invention provides a sealing welding device for a metal furnace shell of an atmosphere industrial furnace, comprising a robot and a welding head arranged at the working end of the robot; a cleaning unit is arranged around the welding head, the cleaning unit comprises two brackets, the two brackets are symmetrically arranged on both sides of the welding head around the welding head, and the two brackets rotate synchronously around the welding head around the axis of the welding head, a first driving unit is hinged on the bracket, a cleaning roller is arranged on the driving end of the first driving unit, the cleaning roller rotates synchronously with the first driving unit, and an angle monitoring device for monitoring the rotation angle of the first driving unit is arranged on the upper part of the first driving unit, the angle monitoring device is preset with a minimum angle, when the first driving unit rotates to the minimum angle, the first driving unit is started, and when the welding head welds the furnace shell, the first driving unit drives the cleaning roller to rotate, and the peripheral walls of the two cleaning rollers are in contact with the inner side of the furnace shell, at this time, the axes of the two cleaning rollers located on both sides of the welding head are in a colinear state.

[0007] Preferably, when the axis of the cleaning roller and the axis of the welding head are perpendicular to each other, the angle of the first drive unit corresponding to the cleaning roller monitored by the angle monitoring device is zero. After the cleaning roller contacts the inner wall of the furnace shell, the cleaning roller drives the first drive unit to rotate toward the side of the welding end away from the welding head, and the angle of the first drive unit corresponding to the cleaning roller monitored by the angle monitoring device is greater than zero.

[0008] Preferably, the first driving unit includes a driving block hinged on a bracket, a plurality of first electromagnetic blocks are arranged at one end of the driving block, the first electromagnetic blocks are arranged in a ring shape, a cleaning roller is rotatably arranged at one end of the driving block along the axis of the ring structure formed by the first electromagnetic blocks, and a plurality of first adsorption blocks that can be magnetically attracted are evenly arranged around the axis of the cleaning roller at one end of the cleaning roller close to the driving block. When the first driving unit is in operation, the first electromagnetic blocks are energized in sequence.

[0009] Preferably, a second driving unit is arranged on the upper part of the bracket, and the second driving unit includes a fixing ring fixedly mounted on the side wall of the welding head, a driving ring is arranged below the fixing ring, the driving ring rotates around the axis of the welding head, the bracket is fixedly arranged at the bottom of the driving ring, a plurality of second electromagnetic blocks are evenly arranged on the fixing ring around the axis of the fixing ring, a plurality of second adsorption blocks that can be magnetically attracted are evenly arranged on the driving ring around the axis of the driving ring, and the second electromagnetic blocks located on the fixing ring are energized in sequence.

[0010] Preferably, the angle monitoring device includes a guide groove opened on the driving block along the extension direction of the driving block, a lifting block moving along the extension direction of the welding head is arranged on one side of the guide groove, the lifting block extends into the guide groove and slides with the guide groove, an extension rod is fixedly arranged on the upper part of the lifting block along the extension direction of the welding head, a rangefinder is arranged on the upper part of the extension rod along the extension direction of the extension rod, and the monitoring end of the rangefinder faces the upper end face of the extension rod.

[0011] Preferably, a fixing plate is fixedly provided on the bracket, the extension direction of the extension rod is perpendicular to the end face of the fixing plate, the extension rod penetrates the fixing plate and slides with the fixing plate along the extension direction of the welding head, and there is a gap between the upper part of the extension rod and the upper part of the fixing plate, and a spring is provided in the gap along the extension direction of the extension rod, the spring is sleeved on the periphery of the extension rod, and the two ends of the spring are respectively fixedly connected to the fixing plate and the upper end of the extension rod.

[0012] Preferably, a first corrugated sleeve is provided on the outer cover of the rangefinder, and the first corrugated sleeve is made of a light-shielding material.

[0013] Preferably, a self-locking unit is provided on the fixed plate, the self-locking unit includes an electromagnet fixedly provided on the fixed plate, a magnetically attracted adsorption ring is provided below the electromagnet, the adsorption ring fixed sleeve is provided on the extension rod, a second corrugated sleeve is provided inside the first corrugated sleeve along the extension direction of the first corrugated sleeve, an annular cavity is present between the first corrugated sleeve and the second corrugated sleeve, the rangefinder is provided in the annular cavity, and a valve body is provided on the upper part of the annular cavity.

[0014] Preferably, a plurality of brushes are evenly arranged on the peripheral wall of the cleaning roller around the axis of the cleaning roller, a sliding groove is opened on the peripheral wall of the cleaning roller along the radial direction of the cleaning roller, a knocking rod is slidably arranged in the sliding groove along the extension direction of the sliding groove, the end of the knocking rod away from the cleaning roller is coated with rubber, and the brushes and the knocking rod are arranged alternately.

[0015] Preferably, a dust suction port is provided on the peripheral wall of the cleaning roller, and outside air flows into the cleaning roller through the dust suction port. A fan is provided on one side of the bracket, and multiple fans are provided, and the fans are evenly arranged around the welding head.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When welding, the robot extends the welding head provided with a cleaning unit into the furnace shell from the opening of the furnace shell. Before the welding head reaches the preset welding position, the cleaning roller located on one side of the welding head first contacts the inner wall of the furnace shell, and the inner wall of the furnace shell abuts against the end of the cleaning roller away from the first drive unit. As the welding head moves, the end of the cleaning roller away from the first drive unit drives the first drive unit to rotate on the bracket, and the angle of the first drive unit monitored by the angle monitoring device gradually increases. When the welding head reaches the preset position, the cleaning roller no longer drives the first drive unit to rotate. If the angle of the first drive unit is greater than the minimum angle at this time, the bracket starts to rotate around the welding head. During the rotation of the bracket, the force of the inner wall of the furnace shell on the end of the cleaning roller gradually decreases, and the angle of the first drive unit gradually decreases. When the angle of the first drive unit is equal to or less than the minimum angle, the first drive unit is started, and the first drive unit drives the cleaning roller to rotate. The cleaning rollers on both sides of the welding head can respectively clean the sides that have completed welding and the sides that have not completed welding at the same time, thereby improving the welding quality. It is worth noting that during welding, the preset welding logic of the welding head is to weld all the sides in the furnace shell from top to bottom in sequence along the vertical direction, thereby ensuring that the inside of the furnace shell can be completely cleaned after welding is completed, thereby improving the welding quality.

[0018] 2. By setting up a distance meter and an extension rod, the distance meter can measure the upper end of the extension rod. When the cleaning roller contacts the inner wall of the furnace shell and drives the driving block to rotate, the lifting block is driven down. In this way, the distance meter can measure the changing distance of the extension rod. The changing distance and the angle of rotation of the driving block are in a trigonometric function relationship. In this way, the actual rotation distance of the driving block can be calculated according to the size of the changing distance.

[0019] 3. By arranging a knocking rod on the cleaning roller, the debris with a flaky structure can be broken by the knocking rod. At the same time, the end of the knocking rod is coated with rubber to ensure that the knocking rod will not damage the inner wall of the furnace shell when hitting the side of the inner wall of the furnace shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The invention is a three-dimensional schematic diagram of a sealing welding device of a metal furnace shell of an atmosphere industrial furnace when it is working.

[0021] Figure 2 The invention is a three-dimensional schematic diagram of a sealing welding device for a metal furnace shell of an atmosphere industrial furnace.

[0022] Figure 3 The present invention is a three-dimensional schematic diagram of a sealing welding device for a metal shell of an atmosphere industrial furnace without a robot.

[0023] Figure 4 It is a sealing welding device for the metal shell of an atmosphere industrial furnace. Figure 3A local enlarged schematic diagram of point A in the middle.

[0024] Figure 5 The present invention is a three-dimensional schematic diagram of a sealing welding device for a metal furnace shell of an atmosphere industrial furnace with the welding head and a robot removed.

[0025] Figure 6 It is a sealing welding device for the metal shell of an atmosphere industrial furnace. Figure 5 A local enlarged schematic diagram of point B in the middle.

[0026] Figure 7 The invention is a cutaway stereoscopic schematic diagram of a sealing welding device for a metal shell of an atmosphere industrial furnace with the welding head and a robot removed.

[0027] Figure 8 It is a sealing welding device for the metal shell of an atmosphere industrial furnace. Figure 7 A partial enlarged schematic diagram of point C in the middle.

[0028] Fig. 9 It is a sealing welding device for the metal shell of an atmosphere industrial furnace. Figure 7 A partial enlarged schematic diagram of point D in the middle.

[0029] Fig.10 The invention is a cutaway stereoscopic schematic diagram of a cleaning unit of a sealing welding device for a metal shell of an atmosphere industrial furnace.

[0030] The numbers in the figure are:

[0031] 1. Robot; 11. Welding head; 2. Cleaning unit; 21. Cleaning roller; 211. Brush; 212. Knocking rod; 213. Dust suction port; 214. Fan; 215. Dust collecting pipe; 22. Bracket; 23. First driving unit; 231. Driving block; 232. First electromagnetic block; 233. First adsorption block; 24. Angle monitoring device; 241. Guide groove; 242. Lifting block; 243. Extension rod; 244. Rangefinder; 245. Fixed plate; 246. Spring; 247. First corrugated sleeve; 248. Self-locking unit; 2481. Electromagnet; 2482. Adsorption ring; 2483. Second corrugated sleeve; 2484. Valve body; 25. Second driving unit; 251. Driving ring; 252. Fixed ring; 253. Second electromagnetic block; 254. Second adsorption block; 3. Furnace shell. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Reference Figure 1 , Figure 2 and Figure 5A sealing welding device for a metal furnace shell of an atmosphere industrial furnace comprises a robot 1 and a welding head 11 arranged at the working end of the robot 1; a cleaning unit 2 is arranged around the welding head 11, and the cleaning unit 2 comprises two brackets 22, the two brackets 22 are symmetrically arranged on both sides of the welding head 11 around the welding head 11, and the two brackets 22 rotate synchronously around the welding head 11 around the axis of the welding head 11, and a first driving unit 23 is hinged on the bracket 22, and a cleaning roller 21 is arranged on the driving end of the first driving unit 23, and the cleaning roller 21 and the first driving unit 23 are connected to each other. The first drive unit 23 rotates synchronously, and an angle monitoring device 24 for monitoring the rotation angle of the first drive unit 23 is arranged on the upper part of the first drive unit 23. The angle monitoring device 24 is preset with a minimum angle. When the first drive unit 23 rotates to the minimum angle, the first drive unit 23 starts. When the welding head 11 welds the furnace shell 3, the first drive unit 23 drives the cleaning rollers 21 to rotate, and the peripheral walls of the two cleaning rollers 21 contact the inner side of the furnace shell 3. At this time, the axes of the two cleaning rollers 21 located on both sides of the welding head 11 are in a collinear state.

[0034] In the existing welding operation, the cleaning unit 2 and the welding head 11 are usually separately arranged, and when the welding head 11 is welding inside the furnace shell 3, the cleaning unit 2 mostly uses the airflow cleaning method, that is, the debris generated during welding is sucked away by the suction of the airflow, but when the welding head 11 is welding, some debris will be adhered to the welded position, so the attached debris cannot be sucked out only by the suction of the airflow. Due to the special shape of the furnace shell 3, that is, an opening is provided on one side of the furnace shell 3, and the size of the opening is limited, if the welding head 11 and the cleaning unit 2 with a brushing function are operated at the same time, the operating space will be limited, which will result in that both the welding and cleaning operations cannot be completed well, and the robot 1 provided with the welding head 11 may also collide with the cleaning unit 2.

[0035] In order to avoid the above situation, the cleaning unit 2 is improved, and the cleaning unit 2 is combined with the welding head 11, so that the cleaning unit 2 can move synchronously with the welding head 11, so as to avoid the cleaning unit 2 causing obstruction to the welding operation of the welding head 11. The specific working principle is as follows. When welding, the robot 1 extends the welding head 11 provided with the cleaning unit 2 from the opening of the furnace shell 3 into the furnace shell 3. Since the existing automated welding processes are pre-set, after the welding head 11 is extended into the furnace shell 3, the welding head 11 gradually approaches one of the side edges in the furnace shell 3. Since the cleaning unit 2 is arranged around the welding head 11, the cleaning unit 2 may not be completely matched with the side edge in the furnace shell 3 at this time, that is, the two cleaning rollers 21 will contact the inner wall of the furnace shell 3 before the welding head 11 reaches the preset welding position. In the initial state, that is, when the two cleaning rollers 21 have not yet contacted the inner wall of the furnace shell 3, the axes of the two cleaning rollers 21 are in a mutually collinear state. When the cleaning rollers 21 are in contact with the inner wall of the furnace shell 3 and are squeezed, the axes of the two cleaning rollers 21 are no longer collinear. Before welding, after the two cleaning rollers 21 rotate around the welding head 11 to a collinear state, the welding head 11 can start working normally.

[0036] For ease of understanding, one of the cleaning rollers 21 is used as a reference for description. Before the welding head 11 reaches the preset welding position, the cleaning roller 21 on one side of the welding head 11 first contacts the inner wall of the furnace shell 3, and the inner wall of the furnace shell 3 abuts against the end of the cleaning roller 21 away from the first drive unit 23. As the welding head 11 moves, the end of the cleaning roller 21 away from the first drive unit 23 drives the first drive unit 23 to rotate on the bracket 22, and the angle monitoring device 24 monitors the rotation angle of the first drive unit 23 in real time. Since the first drive unit 23 is hinged on the bracket 22, there will be slight shaking during the movement of the welding head 11, which causes relative rotation between the first drive unit 23 and the bracket 22, and the rotation angle between the first drive unit 23 and the bracket 22 without external force is always less than the minimum angle. The reason why the angle between the first drive unit 23 and the bracket 22 is always less than the minimum angle will be described below. In this way, when the cleaning roller 21 is not in contact with the inner wall of the furnace shell 3 and the welding head 11 is in a moving state, the axes between the two cleaning rollers 21 on both sides of the welding head 11 can be assumed to be always in a colinear state, and when the welding head 11 moves to the preset position, the end of the cleaning roller 21 away from the first drive unit 23 will contact the inner wall of the furnace shell 3. As the welding head 11 moves, the cleaning roller 21 drives the first drive unit 23 to rotate, and the angle of the first drive unit 23 monitored by the angle monitoring device 24 gradually increases. When the welding head 11 reaches the preset position, the cleaning roller 21 no longer drives the first drive unit 23 to rotate. If the angle of the first drive unit 23 is greater than the minimum angle at this time, the bracket 22 begins to rotate around the welding head. 11 rotates, during the rotation of the bracket 22, the force of the inner wall of the furnace shell 3 on the end of the cleaning roller 21 gradually decreases, and the angle of the first drive unit 23 gradually decreases. When the angle of the first drive unit 23 is equal to or less than the minimum angle, the first drive unit 23 is started, and the first drive unit 23 drives the cleaning roller 21 to rotate. The cleaning rollers 21 located on both sides of the welding head 11 can respectively clean the side edges that have completed welding and the side edges that have not completed welding at the same time, thereby improving the welding quality. It is worth noting that during welding, the preset welding logic of the welding head 11 is to weld all the side edges in the furnace shell 3 from top to bottom in the vertical direction at one time, thereby ensuring that the inside of the furnace shell 3 can be completely cleaned after welding is completed.

[0037] Reference Figure 1-Figure 10 : When the axis of the cleaning roller 21 and the axis of the welding head 11 are perpendicular to each other, the angle of the first drive unit 23 corresponding to the cleaning roller 21 monitored by the angle monitoring device 24 is zero. After the cleaning roller 21 contacts the inner wall of the furnace shell 3, the cleaning roller 21 drives the first drive unit 23 to rotate toward the side of the welding end away from the welding head 11, and the angle of the first drive unit 23 corresponding to the cleaning roller 21 monitored by the angle monitoring device 24 is greater than zero.

[0038] And as the welding head 11 continues to approach the inner wall of the furnace shell 3, the cleaning roller 21 will also drive the first drive unit 23 to rotate continuously, so that the angle of the first drive unit 23 monitored by the angle monitoring device 24 will continue to increase. When the welding head 11 reaches the preset position, the rotation angle of the first drive unit 23 reaches the maximum. At this time, the bracket 22 begins to rotate around the welding head 11, so that the axis of the cleaning roller 21 is gradually parallel to the side of the furnace shell 3. At this time, the angle of the first drive unit 23 gradually decreases. When the rotation angle of the first drive unit 23 is less than the minimum angle, the first drive unit 23 is started. At this time, the cleaning roller 21 can be rotated to complete the cleaning of the side of the furnace shell 3.

[0039] Reference Fig.10 The first driving unit 23 includes a driving block 231 hinged on the bracket 22, and a plurality of first electromagnetic blocks 232 are arranged at one end of the driving block 231. The first electromagnetic blocks 232 are arranged in a ring shape. The cleaning roller 21 is rotatably arranged along the axis of the ring structure formed by the first electromagnetic blocks 232 at one end of the driving block 231. A plurality of first adsorption blocks 233 that can be magnetically attracted are evenly arranged around the axis of the cleaning roller 21 at one end of the cleaning roller 21 close to the driving block 231. When the first driving unit 23 is in operation, the first electromagnetic blocks 232 are energized in sequence.

[0040] The first electromagnetic block 232 that is energized in this way can attract the first adsorption block 233 , so that the first adsorption block 233 drives the cleaning roller 21 to rotate.

[0041] Reference Figure 5 and Figure 7 A second driving unit 25 is arranged on the upper part of the bracket 22, and the second driving unit 25 includes a fixing ring 252 fixedly mounted on the side wall of the welding head 11, and a driving ring 251 is arranged below the fixing ring 252. The driving ring 251 rotates around the axis of the welding head 11, and the bracket 22 is fixedly arranged at the bottom of the driving ring 251. A plurality of second electromagnetic blocks 253 are evenly arranged on the fixing ring 252 around the axis of the fixing ring 252, and a plurality of second adsorption blocks 254 that can be magnetically attracted are evenly arranged on the driving ring 251 around the axis of the driving ring 251. The second electromagnetic blocks 253 located on the fixing ring 252 are energized in sequence.

[0042] After the second electromagnetic blocks 253 are energized in sequence, the second electromagnetic blocks 253 that are energized in sequence will have an attraction effect on the second adsorption block 254, so that the second adsorption block 254 drives the driving ring 251 to rotate, and then the bracket 22 fixed on the driving ring 251 can rotate around the axis of the welding head 11. Compared with the traditional motor drive, the magnetic drive method occupies less space and is more suitable for being set around the welding head 11.

[0043] Reference Figure 7 , Fig. 9 and Fig.10 The angle monitoring device 24 includes a guide groove 241 provided on the driving block 231 along the extension direction of the driving block 231, a lifting block 242 moving along the extension direction of the welding head 11 is provided on one side of the guide groove 241, the lifting block 242 extends into the guide groove 241 and slides with the guide groove 241, an extension rod 243 is fixedly provided on the upper part of the lifting block 242 along the extension direction of the welding head 11, a rangefinder 244 is provided on the upper part of the extension rod 243 along the extension direction of the extension rod 243, and the monitoring end of the rangefinder 244 faces the upper end face of the extension rod 243.

[0044] The rangefinder 244 is fixedly arranged at the bottom of the driving ring 251. Since the lifting block 242 can only move along the extension direction of the welding head 11, the straight-line distance between the lifting block 242 and the bracket 22 does not change. Therefore, when the cleaning roller 21 contacts the inner wall of the furnace shell 3, the furnace shell 3 abuts the end of the cleaning roller 21, and the cleaning roller 21 drives the driving block 231 to rotate. In this way, the guide groove 241 arranged on the driving block 231 drives the lifting block 242. When the end of the cleaning roller 21 abuts against the inner wall of the furnace shell 3, the end of the cleaning tube away from the driving block 231 will only rotate toward the side of the welding end away from the welding head 11. In this way, when the driving block 231 rotates, the lifting block 242 begins to descend, and the extension rod 243 arranged on the upper part of the lifting block 242 descends synchronously with the lifting block 242. At this time, the rangefinder 244 can monitor the change distance of the upper part of the extension rod 243. The larger the change distance monitored by the rangefinder 244, the larger the rotation angle of the driving block 231. Conversely, the smaller the change distance monitored by the rangefinder 244, the smaller the rotation angle of the driving block 231. It can be seen that the rotation angle and the change distance are in a trigonometric function relationship. In this way, it is achieved by measuring the change distance of the extension rod 243, and then inferring the size of the rotation angle.

[0045] Reference Fig. 9 : A fixing plate 245 is fixedly arranged on the bracket 22, and the extension direction of the extension rod 243 is perpendicular to the end face of the fixing plate 245. The extension rod 243 penetrates the fixing plate 245 and slides with the fixing plate 245 along the extension direction of the welding head 11. There is a gap between the upper part of the extension rod 243 and the upper part of the fixing plate 245, and a spring 246 is arranged in the gap along the extension direction of the extension rod 243. The spring 246 is sleeved on the periphery of the extension rod 243, and the two ends of the spring 246 are respectively fixedly connected to the fixing plate 245 and the upper end of the extension rod 243.

[0046] In this way, the spring 246 can prevent the weight of the cleaning roller 21 from driving the driving block 231 to rotate through its own elastic force, thereby preventing the driving block 231 from rotating freely on the bracket 22. Under the elastic force of the spring 246, the rotation angle of the first driving unit 23 is always less than the minimum angle when the cleaning roller 21 is not in contact with the inner wall of the furnace shell 3.

[0047] Reference Fig. 9 A first corrugated sleeve 247 is provided on the outer sleeve of the rangefinder 244, and the first corrugated sleeve 247 is made of a light-shielding material.

[0048] Two ends of the first corrugated sleeve 247 are fixedly connected to the fixing plate 245 and the driving ring 251 respectively.

[0049] Reference Figure 5 , Figure 6 and Fig. 9 A self-locking unit 248 is arranged on the fixed plate 245, and the self-locking unit 248 includes an electromagnet 2481 fixedly arranged on the fixed plate 245, and a magnetically attracted adsorption ring 2482 is arranged below the electromagnet 2481, and the adsorption ring 2482 is fixedly sleeved on the extension rod 243, and a second corrugated sleeve 2483 is arranged inside the first corrugated sleeve 247 along the extension direction of the first corrugated sleeve 247, and an annular cavity is present between the first corrugated sleeve 247 and the second corrugated sleeve 2483, and the rangefinder 244 is arranged in the annular cavity, and a valve body 2484 is arranged on the upper part of the annular cavity.

[0050] In order to prevent the first driving unit 23 from rotating freely, a spring 246 is arranged between the upper end of the extension rod 243 and the upper part of the fixing plate 245. However, when not in use, the spring 246 needs to overcome the rotation thrust of the driving block 231 for a long time, so that the spring 246 is compressed for a long time, which greatly reduces the service life of the spring 246. In order to extend the service life of the spring 246, a self-locking unit 248 is arranged. The valve body 2484 is arranged on the upper part of the driving ring 251 and communicates with the annular cavity. When not in use daily, the electromagnet 2481 is energized first, the electromagnet 2481 adsorbs the adsorption ring 2482, and the adsorption ring 2482 drives the extension rod 243 to rise, so that the spring 246 in the gap is restored from the compressed state. When the electromagnet 2481 adsorbs the adsorption ring 2482, the valve body 2484 is in an open state. After the adsorption ring 2482 is adsorbed by the electromagnet 2481, the valve body 2484 is closed, so that an air lock is formed in the annular cavity, which ensures that the spring 246 will no longer be affected by the first drive unit 23.

[0051] Reference Figure 8: A plurality of brushes 211 are evenly arranged on the peripheral wall of the cleaning roller 21 around the axis of the cleaning roller 21, a sliding groove is opened on the peripheral wall of the cleaning roller 21 along the radial direction of the cleaning roller 21, a knocking rod 212 is slidably arranged in the sliding groove along the extension direction of the sliding groove, the end of the knocking rod 212 away from the cleaning roller 21 is coated with rubber, and the brushes 211 and the knocking rod 212 are arranged alternately.

[0052] Since some of the debris generated after welding is in a flaky structure, the debris needs to be broken into pieces before it can be cleaned normally. Therefore, after the cleaning roller 21 rotates, the cleaning roller 21 can clean the side of the furnace shell 3 through the brush 211. At the same time, as the cleaning roller 21 rotates, the knocking rod 212 in the sliding groove is thrown out under the action of centrifugal force. The knocking rod 212 hits the side of the furnace shell 3 after being thrown out, so that the debris remaining on the side can be broken into pieces and cleaned. The rubber coating on the end of the knocking rod 212 can prevent the inner wall of the furnace shell 3 from being damaged when the knocking rod 212 directly hits the inside of the furnace shell 3.

[0053] Reference Figure 3-Figure 5 A dust suction port 213 is provided on the peripheral wall of the cleaning roller 21, and external air flows into the cleaning roller 21 through the dust suction port 213. A fan 214 is provided on one side of the bracket 22. There are multiple fans 214, and the fans 214 are evenly arranged around the welding head 11.

[0054] Dust collecting pipes 215 are provided at the output ends of the dust suction port 213 and the output ends of the fan 214. The dust collecting pipe 215 is used to discharge welding debris from the furnace shell 3. The dust collecting pipe 215 connected to the dust suction port 213 is connected to the end of the cleaning roller 21, and passes through the driving block 231, the lifting block 242, the extension rod 243, the second corrugated sleeve 2483 and the fixing ring 252 in sequence. An air pump is provided at one end of the dust collecting pipe 215 connected to the dust suction port 213. The air pump extracts the debris at the dust suction port 213 through the dust collecting pipe 215. When the cleaning roller 21 rotates, the dust suction port 213 first cleans the swept debris, and then the fan 214 removes the debris not sucked away by the dust suction port 213 for a second time.

[0055] Working principle: When welding, the robot 1 extends the welding head 11 provided with the cleaning unit 2 into the furnace shell 3 from the opening of the furnace shell 3. Before the welding head 11 reaches the preset welding position, the cleaning roller 21 located on one side of the welding head 11 first contacts the inner wall of the furnace shell 3, and the inner wall of the furnace shell 3 abuts the end of the cleaning roller 21 away from the first drive unit 23. As the welding head 11 moves, the end of the cleaning roller 21 away from the first drive unit 23 drives the first drive unit 23 to rotate on the bracket 22, and the angle of the first drive unit 23 monitored by the angle monitoring device 24 gradually increases. When the welding head 11 reaches the preset position, the cleaning roller 21 no longer drives the first drive unit 23 to rotate. If the angle of the first drive unit 23 is greater than the minimum angle degrees, the bracket 22 starts to rotate around the welding head 11. During the rotation of the bracket 22, the force of the inner wall of the furnace shell 3 on the end of the cleaning roller 21 gradually decreases, and the angle of the first drive unit 23 gradually decreases. When the angle of the first drive unit 23 is equal to or less than the minimum angle, the first drive unit 23 is started, and the first drive unit 23 drives the cleaning roller 21 to rotate. The cleaning rollers 21 located on both sides of the welding head 11 can respectively clean the sides that have completed welding and the sides that have not completed welding at the same time, thereby improving the welding quality. It is worth noting that during welding, the preset welding logic of the welding head 11 is to weld all the sides in the furnace shell 3 from top to bottom in sequence along the vertical direction, thereby ensuring that the inside of the furnace shell 3 can be completely cleaned after welding is completed.

[0056] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A sealing welding device for a metal shell of an atmosphere industrial furnace, comprising a robot and a welding head arranged at the working end of the robot; It is characterized in that A cleaning unit is arranged around the welding head, and the cleaning unit comprises two brackets, which are symmetrically arranged on both sides of the welding head around the welding head, and the two brackets rotate synchronously around the welding head around the axis of the welding head, a first driving unit is hinged on the bracket, a cleaning roller is arranged on the driving end of the first driving unit, the cleaning roller rotates synchronously with the first driving unit, and an angle monitoring device for monitoring the rotation angle of the first driving unit is arranged on the upper part of the first driving unit, and the angle monitoring device is preset with a minimum angle, when the first driving unit rotates to the minimum angle, the first driving unit is started, and when the welding head welds the furnace shell, the first driving unit drives the cleaning roller to rotate, and the peripheral walls of the two cleaning rollers are in contact with the inner side of the furnace shell, and at this time, the axes of the two cleaning rollers located on both sides of the welding head are in a colinear state; When the axis of the cleaning roller is perpendicular to the axis of the welding head, the angle of the first drive unit corresponding to the cleaning roller monitored by the angle monitoring device is zero. After the cleaning roller contacts the inner wall of the furnace shell, the cleaning roller drives the first drive unit to rotate toward the welding end away from the welding head, and the angle of the first drive unit corresponding to the cleaning roller monitored by the angle monitoring device is greater than zero. The first driving unit includes a driving block hinged on the bracket, a plurality of first electromagnetic blocks are arranged at one end of the driving block, the first electromagnetic blocks are arranged in a ring shape, a cleaning roller is arranged to rotate along the axis of the ring structure formed by the first electromagnetic blocks at one end of the driving block, and a plurality of first adsorption blocks that can be magnetically attracted are evenly arranged around the axis of the cleaning roller at one end of the cleaning roller close to the driving block, and when the first driving unit is in operation, the first electromagnetic blocks are energized in sequence; The angle monitoring device includes a guide groove provided on the driving block along the extension direction of the driving block, a lifting block moving along the extension direction of the welding head is provided on one side of the guide groove, the lifting block extends into the guide groove and slidably cooperates with the guide groove, an extension rod is fixedly provided on the upper part of the lifting block along the extension direction of the welding head, a rangefinder is provided on the upper part of the extension rod along the extension direction of the extension rod, and a monitoring end of the rangefinder faces the upper end surface of the extension rod; A second driving unit is arranged on the upper part of the bracket, and the second driving unit includes a fixed ring fixedly sleeved on the side wall of the welding head, a driving ring is arranged below the fixed ring, and the driving ring rotates around the axis of the welding head. The bracket is fixedly arranged at the bottom of the driving ring, and a plurality of second electromagnetic blocks are evenly arranged on the fixed ring around the axis of the fixed ring, and a plurality of second adsorption blocks that can be magnetically attracted are evenly arranged on the driving ring around the axis of the driving ring, and the second electromagnetic blocks located on the fixed ring are energized in sequence; A plurality of brushes are evenly arranged on the peripheral wall of the cleaning roller around the axis of the cleaning roller, a sliding groove is opened on the peripheral wall of the cleaning roller along the radial direction of the cleaning roller, a knocking rod is slidably arranged in the sliding groove along the extension direction of the sliding groove, the end of the knocking rod away from the cleaning roller is coated with rubber, and the brushes and the knocking rod are arranged alternately.

2. The sealing welding device for the metal shell of an atmosphere industrial furnace according to claim 1 is characterized in that: A fixing plate is fixedly arranged on the bracket, and the extension direction of the extension rod is perpendicular to the end face of the fixing plate. The extension rod penetrates the fixing plate and slides with the fixing plate along the extension direction of the welding head. There is a gap between the upper part of the extension rod and the upper part of the fixing plate. A spring is arranged in the gap along the extension direction of the extension rod. The spring is sleeved on the periphery of the extension rod, and the two ends of the spring are fixedly connected to the fixing plate and the upper end of the extension rod respectively.

3. The sealing welding device for the metal shell of an atmosphere industrial furnace according to claim 2 is characterized in that: A first corrugated sleeve is arranged on the outer cover of the rangefinder, and the first corrugated sleeve is made of light-shielding material.

4. The sealing welding device for the metal shell of an atmosphere industrial furnace according to claim 3 is characterized in that: A self-locking unit is arranged on the fixed plate, and the self-locking unit includes an electromagnet fixedly arranged on the fixed plate, and an adsorption ring that can be magnetically attracted is arranged below the electromagnet, and the adsorption ring fixed sleeve is arranged on the extension rod, and a second corrugated sleeve is arranged inside the first corrugated sleeve along the extension direction of the first corrugated sleeve, and an annular cavity is present between the first corrugated sleeve and the second corrugated sleeve, and a rangefinder is arranged in the annular cavity, and a valve body is arranged on the upper part of the annular cavity.

5. The sealing welding device for the metal shell of an atmosphere industrial furnace according to claim 1 is characterized in that: A dust suction port is provided on the peripheral wall of the cleaning roller, and outside air flows into the cleaning roller through the dust suction port. A fan is provided on one side of the bracket. There are multiple fans, and the fans are evenly arranged around the welding head.

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