Welding device for transformer oil tank and working method

Abstract

The invention belongs to the technical field of machine tools, and relates to a welding device for a transformer oil tank and a working method.The welding device for the transformer oil tank comprises a welding mechanism, a welding mechanism and a welding mechanism, when the elastic strip is in a bent state, the elastic strip is partially in contact with the inner wall of the conical part, the introduced protective gas drives the inner sleeve to rotate, and the elastic strip is driven to scrape off residues remaining on the inner wall of the conical part; when the scraping assembly cannot scrape residues, the residues jack up the elastic strip to enable the clamping block to be separated from the clamping groove, the elastic strip recovers deformation to drive the inner sleeve to incline, and the elastic strip part does not make contact with the inner wall of the conical part any more, so that protective gas introduced into the gap is guided by the inclined inner sleeve and then is directly blown out without passing through the residues; and therefore, the blown protective gas is prevented from being disturbed by the residual welding slag of the outer sleeve in the welding process, and the protective gas is ensured to be uniformly blown out to protect a welding seam.

Description

Technical Field

[0001] The present invention belongs to the technical field of machine tools, and specifically relates to welding, and in particular to a welding device and a working method for a transformer oil tank. Background Art

[0002] Shielded welding refers to the protection of the molten weld produced during the welding process by gas protection. For example, argon arc welding is to introduce argon gas to cover the weld during the welding process to isolate the weld from the air, thereby preventing the weld from oxidizing before solidification and affecting the welding effect. In traditional flat plate welding, the welding head and the plate surface are usually designed to have a certain inclination angle to prevent the airflow from colliding with the plate surface and then flowing back into the nozzle, thereby carrying molten welding slag and splashing into the nozzle, causing nozzle blockage.

[0003] Since various pipelines need to be welded on the transformer oil tank, the outer wall of the pipeline is in an arc shape during the welding process. At this time, the blown airflow will be rebounded by the pipe wall and will be scattered irregularly. There will still be a situation where welding slag splashes into the inside of the nozzle. The above situation will cause the blown airflow to be disturbed due to the adhesion of welding slag in the nozzle. In severe cases, the weld cannot be completely covered, resulting in a decrease in welding effect.

[0004] Therefore, due to the technical problem that welding slag will adhere to the inner wall of the sleeve during the welding process, causing the blown shielding gas to be disturbed and unable to evenly protect the weld, it is necessary to design a welding device and working method for the transformer oil tank.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide a welding device and a working method for a transformer oil tank.

[0007] In a first aspect, an embodiment of the present disclosure provides a welding device for a transformer oil tank, comprising: a welding mechanism configured to weld the transformer tank; A protection mechanism is sleeved outside the welding mechanism, with a gap between the welding mechanism and the protection mechanism, through which a shielding gas is introduced to protect the weld during welding; The protection mechanism includes: an outer sleeve and an inner sleeve; The inner sleeve is inserted into the outer sleeve and is rotatably connected to the outer sleeve; The bottom of the outer sleeve is a tapered portion; The bottom of the inner sleeve is connected to a plurality of scraping components, and the clamping blocks in the scraping components extend into the clamping grooves provided in the outer sleeve, so that the elastic strips in the scraping components are bent; When the elastic strip is bent, the elastic strip contacts the inner wall of the tapered portion, and the introduced protective gas drives the inner sleeve to rotate, driving the elastic strip to scrape off the residue remaining on the inner wall of the tapered portion; When the scraping assembly cannot scrape off the residue, the residue pushes up the elastic strip to disengage the block from the slot, and the elastic strip recovers its deformation to drive the inner sleeve to tilt. The elastic strip part no longer contacts the inner wall of the tapered portion, so that the protective gas entering the gap is guided by the inclined inner sleeve and blown out directly without passing through the residue.

[0008] In an optional embodiment, the inner sleeve includes a plurality of trapezoidal bars, the trapezoidal bars are arranged around the welding mechanism, and the trapezoidal bars are connected to corresponding elastic bars; A clamping block is provided on one side of the elastic strip close to the outer sleeve; When the card block is inserted into the card slot, the elastic strip is bent, and the oblique part of the elastic strip contacts the inner wall of the tapered part, and the vertical part of the elastic strip contacts the inner wall of the outer sleeve; When the card block is disengaged from the card slot, the elastic strip recovers its deformation and drives the corresponding trapezoidal strip to tilt.

[0009] In an optional embodiment, an annular groove is provided on the inner wall of the outer sleeve; An adaptable ring body is provided in the annular groove, the ring body is sleeved outside the trapezoidal bar, and the trapezoidal bar is connected to the ring body. In an optional embodiment, the outer sleeve includes: a straight portion and a tapered portion; The tapered portion contacts the bottom surface of the straight portion, the clamping groove is opened on the bottom surface of the straight portion, and the clamping groove is annular with an opening facing downward.

[0010] In an optional embodiment, the welding mechanism includes: a welding head; The inner sleeve is sleeved outside the welding head, and there is a gap between the inner sleeve and the welding head; At least one air outlet is provided on the outer wall of the welding head. The air outlet is arranged obliquely downward and is connected to an external air source so that the gas is blown obliquely downward into the gap through the air outlet.

[0011] In an optional embodiment, the welding head is provided on a robot; The outer sleeve is fixedly arranged on the manipulator; The robot is configured to drive the welding head to move.

[0012] In an optional embodiment, a fixing mechanism is provided on one side of the manipulator, and the fixing mechanism is configured to fix the workpiece to be welded; The robot is configured to drive the welding head to move so as to weld the workpiece to be welded.

[0013] In an optional embodiment, the fixing mechanism includes: a bearing plate and a pair of rotating plates; A workpiece to be welded is fixed on the carrying plate; The rotating plate is arranged on both sides of the carrying plate, and the carrying plate is connected to the rotating plate; A rotating shaft is connected to a surface of the rotating plate away from the bearing plate, and a bearing is sleeved on the rotating shaft; The bearing is rotatably connected to the support seat; One of the rotating shafts is connected to a driving motor, which drives the rotating shaft to rotate and then drives the rotating plate to rotate, so that the supporting plate rotates.

[0014] In an optional embodiment, a pair of cylinders are provided on one of the support seats, and the telescopic ends of the cylinders are connected to the tightening blocks. After the supporting plate rotates, the cylinders drive the tightening blocks to contact the rotating plate.

[0015] In a second aspect, the embodiments of the present disclosure further provide a working method using the welding device for a transformer oil tank, comprising: The workpiece to be welded is welded by a welding mechanism, and a shielding gas is introduced during welding to cause the inner sleeve to rotate; When the elastic strip is bent, the elastic strip contacts the inner wall of the tapered portion, and the introduced protective gas drives the inner sleeve to rotate, driving the elastic strip to scrape off the residue remaining on the inner wall of the tapered portion; When the scraping assembly cannot scrape off the residue, the residue pushes up the elastic strip to disengage the block from the slot, and the elastic strip recovers its deformation to drive the inner sleeve to tilt. The elastic strip part no longer contacts the inner wall of the tapered portion, so that the protective gas entering the gap is guided by the inclined inner sleeve and blown out directly without passing through the residue.

[0016] The beneficial effects of the present invention are as follows: the welding device for transformer oil tanks comprises: a welding mechanism, which is configured to weld the transformer oil tank; a protective mechanism, which is sleeved outside the welding mechanism, and there is a gap between the welding mechanism and the protective mechanism, and a protective gas is passed into the gap to protect the weld during the welding process; the protective mechanism comprises: an outer sleeve and an inner sleeve; the inner sleeve is inserted into the outer sleeve and the inner sleeve is rotatably connected to the outer sleeve; the bottom of the outer sleeve is a tapered portion; a plurality of scraping assemblies are connected to the bottom of the inner sleeve, and the card blocks in the scraping assemblies extend into the card grooves provided in the outer sleeve so that the scraping assemblies The elastic strip inside is in a bent state; when the elastic strip is in a bent state, part of the elastic strip contacts the inner wall of the tapered portion, and the introduced shielding gas drives the inner sleeve to rotate, driving the elastic strip to scrape off the residue remaining on the inner wall of the tapered portion; when the scraping assembly cannot scrape off the residue, the residue pushes up the elastic strip to disengage the block from the slot, and the elastic strip recovers its deformation to drive the inner sleeve to tilt, and part of the elastic strip no longer contacts the inner wall of the tapered portion, so that the shielding gas introduced into the gap is guided by the inclined inner sleeve and blown out directly without passing through the residue, thereby preventing the blown shielding gas from being disturbed by the welding slag remaining on the outer sleeve during the welding process, ensuring that the shielding gas is blown out evenly to protect the weld.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a welding device for a transformer oil tank provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of the structure of a protection mechanism provided in an embodiment of the present disclosure; Figure 3 A cross-sectional view of a protection mechanism provided in an embodiment of the present disclosure; Figure 4A cross-sectional view of an outer sleeve provided in an embodiment of the present disclosure; Figure 5 A schematic structural diagram of an inner sleeve provided in an embodiment of the present disclosure; Figure 6 A schematic diagram of the airflow direction of an air outlet provided in an embodiment of the present disclosure; Figure 7 A schematic diagram of a trapezoidal strip state after an elastic strip recovers its deformation provided by an embodiment of the present disclosure; Figure 8 A schematic diagram of the flow direction of protective gas when an elastic strip is bent according to an embodiment of the present disclosure; Figure 9 A schematic diagram of the protective gas flow direction when an elastic strip recovers its deformation provided by an embodiment of the present disclosure.

[0021] In the picture: 1 welding mechanism, 11 welding head, 12 air outlet, 13 manipulator; 2 protection mechanism, 21 outer sleeve, 211 annular groove, 212 clamping groove, 213 straight portion, 214 tapered portion, 22 inner sleeve, 221 elastic strip, 222 clamping block, 223 oblique portion, 224 vertical portion, 225 ring body, 226 trapezoidal strip; 3 fixing mechanism, 31 bearing plate, 32 rotating plate, 33 rotating shaft, 34 bearing, 35 supporting seat, 36 driving motor, 37 cylinder, 38 tightening block. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0024] Various pipelines need to be welded on the transformer oil tank. During the welding process, a sleeve is installed around the welding head to blow shielding gas between the welding head and the inner wall of the sleeve to protect the weld during the welding process. However, welding slag and other impurities will adhere to the inner wall of the sleeve during welding, causing the blown shielding gas to be disturbed by impurities such as welding slag, and the shielding gas cannot be blown out evenly to protect the weld.

[0025] The defects in the above solutions are the results obtained by the inventors after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this article should be the contributions made by the inventors to this disclosure during the disclosure process.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0028] like Figure 2 and Figure 3 As shown, at least one disclosed embodiment provides a welding device for a transformer oil tank, comprising: a welding mechanism 1, which is configured to weld the transformer oil tank; a protective mechanism 2, which is sleeved outside the welding mechanism 1, and there is a gap between the welding mechanism 1 and the protective mechanism 2, and a protective gas is passed into the gap to protect the weld during the welding process.

[0029] The protection mechanism 2 includes: an outer sleeve 21 and an inner sleeve 22; the inner sleeve 22 is inserted into the outer sleeve 21 and is rotatably connected to the outer sleeve 21; the bottom of the outer sleeve 21 is a tapered portion 214; a plurality of scraping components are connected to the bottom of the inner sleeve 22, and the card blocks 222 in the scraping components extend into the card grooves 212 provided in the outer sleeve 21, so that the elastic strips 221 in the scraping components are in a bent state; when the elastic strips 221 are in a bent state, part of the elastic strips 221 contacts the inner wall of the tapered portion 214, and the introduced protective gas drives the inner sleeve 22 to rotate, driving the elastic strips 221 to scrape off the residue remaining on the inner wall of the tapered portion 214.

[0030] When the scraping assembly is unable to scrape off the residue, the residue pushes up the elastic strip 221 to disengage the block 222 from the slot 212, and the elastic strip 221 recovers its deformation to drive the inner sleeve 22 to tilt. The elastic strip 221 part no longer contacts the inner wall of the tapered portion 214, so that the protective gas introduced into the gap is guided by the inclined inner sleeve 22 and blown out directly without passing through the residue, thereby preventing the blown protective gas from being disturbed by the welding slag remaining on the outer sleeve 21 during the welding process, ensuring that the protective gas is blown out evenly to protect the weld.

[0031] Specifically, when residue cannot be scraped off, it is usually because large particles of welding slag have solidified into the nozzle. That is, the welding slag just after sputtering is in a molten state and is easy to scrape off. If it solidifies and is large enough to affect the stability of the airflow, it cannot be scraped off and needs to be processed.

[0032] In this embodiment, when the elastic strip 221 contacts the inner wall of the tapered portion 214, the inner sleeve 22 rotates to drive the elastic strip 221 to rotate, scraping off the smaller impurities such as welding slag on the inner wall of the tapered portion 214, so as to avoid the welding slag from disturbing the shielding gas during the welding process, so that the shielding gas can be evenly blown out from between the outer sleeve 21 and the welding head 11 to evenly protect the weld. At this time, the flow direction of the shielding gas is as follows: Figure 8 As shown in f1.

[0033] In this embodiment, when the welding slag and other impurities on the inner wall of the tapered portion 214 are large, the rotating elastic strip 221 cannot scrape off the welding slag. At this time, the welding slag will push up the elastic strip 221. Since the elastic strip 221 is pushed up, the block 222 originally located in the slot 212 is pulled out by the lifted part of the elastic strip 221. At this time, the elastic strip 221 recovers its deformation, and the elastic strip 221 recovers from the bent state to a long strip shape, pulling the inner sleeve 22 to tilt the inner sleeve 22, that is, the part of the inner sleeve 22 corresponding to the elastic strip 221, the closer it is to the bottom surface of the inner sleeve 22 and the closer it is to the axis of the inner sleeve 22, at this time, the shielding gas in the gap will not pass through the welding slag after being guided by the deformed inner sleeve 22, thereby avoiding the welding slag from disturbing the shielding gas.

[0034] In this embodiment, when the elastic strip 221 is in a bent state, the sum of the lengths of the oblique portion 223 and the vertical portion 224 of the elastic strip 221 is greater than the length of the elastic strip 221 after recovering from the deformation, so that when the block 222 is disengaged from the slot 212, the elastic strip 221 recovers its deformation and can pull the inner sleeve 22 to tilt.

[0035] In this embodiment, the inner sleeve 22 is elastic, so that the elastic strip 221 can pull the inner sleeve 22 to tilt after recovering its deformation, and the inner sleeve 22 continues to rotate after tilting.

[0036] In this embodiment, the block 222 has a certain degree of elasticity, so that the block 222 can be separated from the slot 212 after being pulled by the elastic strip 221 .

[0037] like Figure 3 and Figure 5 As shown, in an optional embodiment, the inner sleeve 22 includes a plurality of trapezoidal bars 226, which are arranged around the welding mechanism 1, and the trapezoidal bars 226 are connected to corresponding elastic bars 221; a clamping block 222 is provided on the side of the elastic bar 221 close to the outer sleeve 21; when the clamping block 222 extends into the clamping groove 212, the elastic bar 221 is in a bent state, and at this time, the inclined portion 223 of the elastic bar 221 contacts the inner wall of the conical portion 214, and the vertical portion 224 of the elastic bar 221 contacts the inner wall of the outer sleeve 21; when the clamping block 222 is disengaged from the clamping groove 212, the elastic bar 221 recovers its deformation and drives the corresponding trapezoidal bar 226 to tilt.

[0038] In this embodiment, only a portion of the vertical portion 224 may be in contact with the inner wall of the outer sleeve 21 . For example, the contact portion may be a portion of the vertical portion 224 close to the connection position between the vertical portion 224 and the oblique portion 223 .

[0039] In this embodiment, when the inner sleeve 22 rotates, the shielding gas can be evenly guided.

[0040] like Figure 7 As shown, in this embodiment, the inner sleeve 22 can be surrounded by a plurality of trapezoidal bars 226. The length of the bottom end of the trapezoidal bar 226 is less than the length of the top end. Each trapezoidal bar 226 is connected to a corresponding elastic bar 221. The corresponding trapezoidal bar 226 is tilted by the recovery deformation of the elastic bar 221, thereby tilting the inner sleeve 22. When all the elastic bars 221 are restored, the side walls of the adjacent trapezoidal bars 226 are in contact. At this time, the inner sleeve 22 surrounded by the trapezoidal bars 226 is conical, and the flow direction of the protective gas is as follows. Figure 9 As shown in f2.

[0041] In this embodiment, a groove can be opened on the inner wall of the conical portion 214 in the outer sleeve 21 near the bottom surface of the conical portion 214, and the groove is annular. The bottom end of the elastic strip 221 can be connected to a protrusion, and the protrusion is located in the groove. When the elastic strip 221 recovers its deformation, the protrusion is always located in the groove to prevent the bottom end of the elastic strip 221 from moving.

[0042] like Figure 4 As shown, in an optional embodiment, an annular groove 211 is provided on the inner wall of the outer sleeve 21; an adaptive ring body 225 is provided in the annular groove 211, and the ring body 225 is sleeved on the outside of the trapezoidal bar 226, and the trapezoidal bar 226 is connected to the ring body 225.

[0043] In an optional embodiment, the outer sleeve 21 includes: a straight portion 213 and a tapered portion 214; the tapered portion 214 contacts the bottom surface of the straight portion 213, the slot 212 is opened on the bottom surface of the straight portion 213, and the slot 212 is annular with the opening of the slot 212 facing downward.

[0044] like Figure 2 and Figure 6 As shown, in an optional embodiment, the welding mechanism 1 includes: a welding head 11; the inner sleeve 22 is sleeved outside the welding head 11, and there is a gap between the inner sleeve 22 and the welding head 11; at least one air outlet 12 is opened on the outer wall of the welding head 11, and the air outlet 12 is inclined downward, and the flow direction of the protective gas at the air outlet is as follows Figure 6 As shown in FIG. 5F , the air outlet 12 is connected to an external air source so that the air is blown obliquely downward into the gap through the air outlet 12 .

[0045] In this embodiment, welding rods are fed into the welding head 11 to perform continuous welding.

[0046] In this embodiment, the air outlet direction of the air outlet hole 12 is tilted downward, so that the blown protective gas can drive the inner sleeve 22 to rotate.

[0047] like Figure 1 As shown, in an optional embodiment, the welding head 11 is disposed on a manipulator 13 ; the outer sleeve 21 is fixedly disposed on the manipulator 13 ; and the manipulator 13 is configured to drive the welding head 11 to move.

[0048] like Figure 1 As shown, in an optional embodiment, a fixing mechanism 3 is provided on one side of the manipulator 13, and the fixing mechanism 3 is configured to fix the workpiece to be welded; the manipulator 13 is configured to drive the welding head 11 to move to weld the workpiece to be welded.

[0049] In this embodiment, the robot 13 can drive the welding head 11 to move according to demand to complete the required welding.

[0050] In this embodiment, the workpiece to be welded may be a pipe connected to the outside of the transformer oil tank, or the transformer oil tank itself.

[0051] like Figure 1As shown, in an optional embodiment, the fixing mechanism 3 includes: a supporting plate 31 and a pair of rotating plates 32; the workpiece to be welded is fixed on the supporting plate 31; the rotating plates 32 are arranged on both sides of the supporting plate 31, and the supporting plate 31 is connected to the rotating plates 32; the rotating plate 32 is connected to a rotating shaft 33 on the side away from the supporting plate 31, and a bearing 34 is sleeved on the rotating shaft 33; the bearing 34 is rotatably connected to the support seat 35; one of the rotating shafts 33 is connected to a driving motor 36, which drives the rotating shaft 33 to rotate through the driving motor 36 and then drives the rotating plate 32 to rotate, so that the supporting plate 31 rotates.

[0052] In this embodiment, some pressing components may be provided on the supporting plate 31 to press the workpieces to be welded placed on the supporting plate 31 to prevent the workpieces to be welded from moving when the supporting plate 31 rotates.

[0053] In this embodiment, the rotating plate 32 can drive the supporting plate 31 to rotate, thereby driving the workpiece to be welded to rotate, so as to facilitate better welding.

[0054] like Figure 1 As shown, in an optional embodiment, a pair of cylinders 37 are provided on one of the support seats 35 , and the telescopic ends of the cylinders 37 are connected to the tightening blocks 38 . After the supporting plate 31 rotates, the cylinders 37 drive the tightening blocks 38 to contact the rotating plate 32 .

[0055] In this embodiment, after the supporting plate 31 rotates, the cylinder 37 drives the pressing block 38 to contact the rotating plate 32, thereby better locking the rotating plate 32 and preventing the rotating plate 32 from rotating during welding, thereby ensuring the welding effect.

[0056] At least one other disclosed embodiment also provides a working method using the above-mentioned welding device for transformer oil tanks, including: welding the workpiece to be welded by the welding mechanism 1, and introducing shielding gas during welding to rotate the inner sleeve 22; when the elastic strip 221 is in a bent state, part of the elastic strip 221 contacts the inner wall of the tapered portion 214, and the introduced shielding gas drives the inner sleeve 22 to rotate, driving the elastic strip 221 to scrape off the residue remaining on the inner wall of the tapered portion 214; when the scraping assembly is unable to scrape off the residue, the residue pushes up the elastic strip 221 to disengage the block 222 from the slot 212, and the elastic strip 221 recovers its deformation to drive the inner sleeve 22 to tilt, and part of the elastic strip 221 no longer contacts the inner wall of the tapered portion 214, so that the shielding gas introduced into the gap is guided by the inclined inner sleeve 22 and blown out directly without passing through the residue.

[0057] In summary, the welding device for the transformer oil tank comprises: a welding mechanism 1, which is configured to weld the transformer oil tank; a protective mechanism 2, which is sleeved outside the welding mechanism 1, and there is a gap between the welding mechanism 1 and the protective mechanism 2, and a protective gas is passed into the gap to protect the weld during the welding process; the protective mechanism 2 comprises: an outer sleeve 21 and an inner sleeve 22; the inner sleeve 22 is inserted into the outer sleeve 21 and the inner sleeve 22 is rotatably connected to the outer sleeve 21; the bottom of the outer sleeve 21 is a tapered portion 214; a plurality of scraping components are connected to the bottom of the inner sleeve 22, and the card block 222 in the scraping component extends into the card groove 212 provided in the outer sleeve 21, so that the elastic strip 221 in the scraping component It is in a bent state; when the elastic strip 221 is in a bent state, part of the elastic strip 221 contacts the inner wall of the tapered portion 214, and the introduced shielding gas drives the inner sleeve 22 to rotate, driving the elastic strip 221 to scrape off the residue remaining on the inner wall of the tapered portion 214; when the scraping assembly cannot scrape off the residue, the residue pushes up the elastic strip 221 to disengage the block 222 from the slot 212, and the elastic strip 221 recovers its deformation to drive the inner sleeve 22 to tilt, and part of the elastic strip 221 no longer contacts the inner wall of the tapered portion 214, so that the shielding gas introduced into the gap is guided by the inclined inner sleeve 22 and blown out directly without passing through the residue, thereby achieving the goal of avoiding the blown shielding gas from being disturbed by the welding slag remaining on the outer sleeve 21 during the welding process, ensuring that the shielding gas is blown out evenly to protect the weld.

[0058] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein unless expressly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0060] Spatially relative terms, such as "inside," "outside," "below," "beneath," "down," "above," "on," etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientations depicted in the figures, spatially relative terms may be intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as being "below" or "below" other elements or features will be oriented to be "above" the other elements or features. Thus, the example term "below" may encompass both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0061] In the above discussion, unless otherwise indicated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0062] With the above-described preferred embodiments of the present invention as inspiration, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A welding device for a transformer oil tank, characterized in that: include: A welding mechanism (1) configured to weld a transformer tank; A protective mechanism (2) is sleeved outside the welding mechanism (1), and a gap exists between the welding mechanism (1) and the protective mechanism (2), and a protective gas is introduced into the gap to protect the weld during the welding process; The protection mechanism (2) comprises: an outer sleeve (21) and an inner sleeve (22); Wherein, the inner sleeve (22) is located inside the sleeve (21) and is rotationally engaged; The bottom of the outer sleeve (21) is a tapered portion (214); The bottom of the inner sleeve (22) is connected to a plurality of scraping components, and the clamping blocks (222) in the scraping components extend into the clamping grooves (212) provided in the outer sleeve (21), so that the elastic strips (221) in the scraping components are in a bent state; When the elastic strip (221) is in a bent state, a portion of the elastic strip (221) contacts the inner wall of the tapered portion (214), and the introduced protective gas drives the inner sleeve (22) to rotate, driving the elastic strip (221) to scrape off the residue remaining on the inner wall of the tapered portion (214); When the scraping assembly is unable to scrape off the residue, the residue pushes up the elastic strip (221) to disengage the clamping block (222) from the clamping groove (212), and the elastic strip (221) recovers its deformation to drive the inner sleeve (22) to tilt, so that the elastic strip (221) part no longer contacts the inner wall of the tapered portion (214), so that the protective gas introduced into the gap is guided by the inclined inner sleeve (22) and blown out directly without passing through the residue.

2. The welding device for transformer oil tank according to claim 1, characterized in that: The inner sleeve (22) comprises a plurality of trapezoidal bars (226), the trapezoidal bars (226) being arranged around the welding mechanism (1), and the trapezoidal bars (226) being connected to corresponding elastic bars (221); A clamping block (222) is provided on a surface of the elastic strip (221) close to the outer sleeve (21); When the clamping block (222) extends into the clamping slot (212), the elastic strip (221) is in a bent state, and at this time, the inclined portion (223) of the elastic strip (221) contacts the inner wall of the tapered portion (214), and the vertical portion (224) of the elastic strip (221) contacts the inner wall of the outer sleeve (21); When the clamping block (222) is disengaged from the clamping slot (212), the elastic strip (221) recovers its deformation and drives the corresponding trapezoidal strip (226) to tilt.

3. The welding device for transformer oil tank according to claim 2, characterized in that: An annular groove (211) is formed on the inner wall of the outer sleeve (21); An adaptable ring body is provided in the annular groove (211), the ring body is sleeved outside the trapezoidal bar (226), and the trapezoidal bar (226) is connected to the ring body.

4. The welding device for transformer oil tank according to claim 2, characterized in that: The outer sleeve (21) comprises a straight portion (213) and a tapered portion (214); The tapered portion (214) contacts the bottom surface of the straight portion (213), the clamping groove (212) is opened on the bottom surface of the straight portion (213), and the clamping groove (212) is annular, with the opening of the clamping groove (212) facing downward.

5. The welding device for transformer oil tank according to claim 1, characterized in that: The welding mechanism (1) comprises: a welding head (11); The inner sleeve (22) is sleeved outside the welding head (11), and a gap exists between the inner sleeve (22) and the welding head (11); At least one air outlet (12) is provided on the outer wall of the welding head (11), and the air outlet (12) is arranged obliquely downward. The air outlet (12) is connected to an external air source so that the gas is blown obliquely downward into the gap through the air outlet (12).

6. The welding device for transformer oil tank according to claim 5, characterized in that: The welding head (11) is arranged on a robot (13); The outer sleeve (21) is fixedly mounted on the manipulator (13); The robot (13) is configured to drive the welding head (11) to move.

7. The welding device for transformer oil tank according to claim 6, characterized in that: A fixing mechanism (3) is provided on one side of the manipulator (13), and the fixing mechanism (3) is configured to fix a workpiece to be welded; The manipulator (13) is configured to drive the welding head (11) to move so as to weld the workpiece to be welded.

8. The welding device for transformer oil tank according to claim 7, characterized in that: The fixing mechanism (3) comprises: a bearing plate (31) and a pair of rotating plates (32); A workpiece to be welded is fixed on the bearing plate (31); The rotating plate (32) is arranged on both sides of the supporting plate (31), and the supporting plate (31) is connected to the rotating plate (32); A rotating shaft (33) is connected to a surface of the rotating plate (32) away from the supporting plate (31), and a bearing (34) is sleeved on the rotating shaft (33); The bearing (34) is rotatably connected to the support seat (35); One of the rotating shafts (33) is connected to a driving motor (36), and the driving motor (36) drives the rotating shaft (33) to rotate, thereby driving the rotating plate (32) to rotate, so that the supporting plate (31) rotates.

9. The welding device for transformer oil tank according to claim 8, characterized in that: A pair of cylinders (37) are provided on one of the support seats (35), and the telescopic ends of the cylinders (37) are connected to the abutting blocks (38). After the bearing plate (31) rotates, the cylinders (37) drive the abutting blocks (38) to contact the rotating plate (32).

10. A working method using the welding device for transformer oil tank according to claim 1, characterized in that: include: Welding the workpiece to be welded by a welding mechanism (1), and introducing a protective gas during welding to cause the inner sleeve (22) to rotate; When the elastic strip (221) is in a bent state, a portion of the elastic strip (221) contacts the inner wall of the tapered portion (214), and the introduced protective gas drives the inner sleeve (22) to rotate, driving the elastic strip (221) to scrape off the residue remaining on the inner wall of the tapered portion (214); When the scraping assembly is unable to scrape off the residue, the residue pushes up the elastic strip (221) to disengage the clamping block (222) from the clamping groove (212), and the elastic strip (221) recovers its deformation to drive the inner sleeve (22) to tilt, so that the elastic strip (221) part no longer contacts the inner wall of the tapered portion (214), so that the protective gas introduced into the gap is guided by the inclined inner sleeve (22) and blown out directly without passing through the residue.

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