Auxiliary device for pipe fixing opening argon arc welding

Abstract

The application discloses an auxiliary device for pipe fixed mouth argon arc welding, comprising: a support, the lower part of the support can be arranged in the weld mouth of the pipe; an argon filling protection structure, the argon filling protection structure is arranged on the lower part of the support and has a folded state and an unfolded state, when the argon filling protection structure is switched to the folded state, the argon filling protection structure can pass through the weld mouth of the pipe and enter the inside of the pipe body, when the argon filling protection structure is switched to the unfolded state, the argon filling protection structure is in the form of a cavity structure with an open top, so that after the argon filling protection structure passes through the weld mouth of the pipe and enters the inside of the pipe body, the argon filling protection structure can be surrounded by the inner wall of the pipe body to form a space for filling argon; an adjusting structure, the adjusting structure is arranged on the support and is used for driving the argon filling protection structure to switch between the folded state and the unfolded state. When the above structure is used for argon arc welding operation, it is not necessary to fill argon in the whole pipe, and it is not necessary to additionally use a conventional temporary plugging material to temporarily plug the weld mouth of the pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline construction, in particular to an auxiliary device for argon arc welding of a pipeline fixed opening. BACKGROUND

[0002] Currently, there are three main welding methods for pressure pipelines, namely tungsten argon arc welding, stick electrode arc welding and argon-electric combined welding (tungsten argon arc welding + stick electrode arc welding). When using tungsten argon arc welding or argon-electric combined welding to weld the pipeline, in order to avoid the influence of oxidation on the welding quality, temporary plugging (direct plugging method, self-made rubber plate jig method or water-soluble paper method) is needed at the weld opening, and argon gas is filled in the entire pipeline to isolate oxygen. However, filling argon gas in the entire pipeline is relatively high in cost, and it is difficult to remove the temporary plugging after welding when welding the pipeline fixed opening. Therefore, currently, self-preserved flux-cored wire is usually used instead of argon filling to weld the pipeline fixed opening, so that the entire welding process does not need to fill argon gas and does not need to temporarily plug the weld opening. However, when using self-preserved flux-cored wire to weld the pipeline fixed opening, it is easy to leave non-metallic inclusions in the form of cones or needles in the weld, which not only reduces the plasticity and toughness of the metal structure, but also increases the stress of the metal structure, thereby causing the metal structure to be prone to cracking due to cold and hot brittleness, and thus the pipeline is prone to be damaged. At the same time, a large amount of spatter is also generated during the welding process, which causes serious appearance defects. Moreover, since the welded part is usually a golden opening, the appearance defects caused by spatter cannot be cleaned, thereby seriously affecting the service life of the pipeline. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an auxiliary device for argon arc welding of a pipeline fixed opening, which is used to assist the operator in performing argon arc welding without contaminating the inner wall of the pipeline. When used, argon gas does not need to be filled in the entire pipeline, thereby facilitating cost reduction. At the same time, there is no need to use a conventional temporary plugging material to temporarily plug the weld opening of the pipeline, which can effectively avoid the problem that the temporary plugging material cannot be removed after welding in the prior art. In addition, it can also effectively avoid a series of problems caused by using self-preserved flux-cored wire welding in the prior art.

[0004] The auxiliary device for pipe fixed opening argon arc welding according to the embodiments of the present application comprises a support, the lower part of the support can be arranged in the weld opening of a pipe; an argon filling protection structure is arranged on the lower part of the support, the argon filling protection structure has a folded state and an unfolded state, the argon filling protection structure can pass through the weld opening of the pipe and enter the inside of the pipe body when switched to the folded state, the argon filling protection structure is in the form of a cavity structure with an open top when switched to the unfolded state, so that the argon filling protection structure can form a space for filling argon with the inner wall of the pipe body after passing through the weld opening of the pipe and entering the inside of the pipe body; an adjusting structure is arranged on the support, the adjusting structure is used to switch the argon filling protection structure between the folded state and the unfolded state.

[0005] The auxiliary device for pipe fixed opening argon arc welding according to the embodiments of the present application has at least the following beneficial effects: the auxiliary device for pipe fixed opening argon arc welding according to the embodiments of the present application can assist the operator to perform argon arc welding operation on the pipe fixed opening without contaminating the inner wall of the pipe, when in use, first, the adjusting structure is used to switch the argon filling protection structure to the folded state, then the lower part of the support and the argon filling protection structure switched to the folded state are passed through the weld opening of the pipe and enter the inside of the pipe body, then the adjusting structure is used to switch the argon filling protection structure to the unfolded state, then the argon filling protection structure switched to the unfolded state and the inner wall of the pipe body form a space for filling argon, at this time, after filling argon in the space formed by the argon filling protection structure switched to the unfolded state and the inner wall of the pipe body, the argon arc welding operation can be performed, compared with the prior art, there is no need to fill argon in the whole pipe, thereby reducing the cost, at the same time, there is no need to use a conventional temporary plugging material to temporarily plug the weld opening of the pipe, which can effectively avoid the problem that the temporary plugging material cannot be removed after welding in the prior art, in addition, it can also effectively avoid a series of problems caused by using self-shielded flux-cored wire welding in the prior art.

[0006] According to some embodiments of the present application, the cross-sectional profile of the argon-filling protection structure in the unfolded state is V-shaped. The argon-filling protection structure has two side walls and two end walls. The two side walls are foldable along the junctions between the two side walls. The end walls are foldable along the junctions between the end walls and the side walls. The middle part of the end walls is foldable. The top part of the side walls is provided with a first extension part. The first extension part is foldable along the junction between the first extension part and the side wall. The support includes a support body and two support members. One end of each of the two support members is rotatably connected to the lower part of the opposite sides of the support body. One end of one of the support members, which is away from the support body, is connected to one of the first extension parts. One end of the other support member, which is away from the support body, is connected to the other first extension part. When both of the support members are rotated to a first position in which the length direction of the support members is parallel to the length direction of the support body, the argon-filling protection structure is switched to the folded state. When both of the support members are rotated to a second position in which the length direction of the support members has a preset included angle with the length direction of the support body, the argon-filling protection structure is switched to the unfolded state. The adjusting structure can switch the two support members between the first position and the second position.

[0007] According to some embodiments of the present application, the number of supports is one. The support is arranged at one end of the argon-filling protection structure.

[0008] According to some embodiments of the present application, the junctions between the two side walls are provided with first creases. The junctions between the end walls and the side walls are provided with second creases. The end walls are of a split structure. The end walls include a first end wall part and a second end wall part which are movably connected to each other. The junction between the first end wall part and the second end wall part forms a vertical joint seam. The junction between the first extension part and the side wall is provided with a third crease.

[0009] According to some embodiments of the present application, the top part of the first extension part is arc-shaped so that the top part of the first extension part can be attached to the inner wall of the pipe body.

[0010] According to some embodiments of the present application, the top part of the first extension part is provided with a first connecting part which extends towards the inside, corresponding to the support member. One end of the support member, which is away from the support body, is connected to the bottom part of the first connecting part.

[0011] According to some embodiments of the present application, the adjusting structure includes a pull rope. One end of the pull rope is connected to one end of the support member which is away from the support body. The other end of the pull rope and the support body are provided with a connecting structure. The connecting structure can adjust the connection position of the other end of the pull rope which is away from the support member, along the length direction of the support body.

[0012] According to some embodiments of the present application, the connecting structure comprises a sliding sleeve and a locking structure, the sliding sleeve is slidably sleeved on the support body, the side of the sliding sleeve is provided with a second connecting part, one end of the pull rope away from the support is connected to the second connecting part, the locking structure has a locked state and an unlocked state, when the locking structure is switched to the locked state, the sliding sleeve can be limited to slide up and down relative to the support body, when the locking structure is switched to the unlocked state, the limitation on the sliding sleeve is removed.

[0013] According to some embodiments of the present application, the opposite sides of the sliding sleeve are provided with second extension parts, the length direction of the second extension parts has an included angle with the length direction of the argon filling protection structure.

[0014] According to some embodiments of the present application, the support body and the support are both pipe body structures, one end of the support away from the support body is provided with a connecting rod for connecting the pull rope, one end of the support away from the first extension part is provided with a first rope passing hole, the support body is provided with a second rope passing hole corresponding to the first rope passing hole, and the top of the support body is an open structure.

[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein:

[0017] Figure 1 is a structural schematic view of an auxiliary device for argon arc welding of a pipe fixed opening when the argon filling protection structure of the embodiment of the present application is located inside the pipe body and switched to the unfolded state;

[0018] Figure 2 is a structural schematic view of an auxiliary device for argon arc welding of a pipe fixed opening when the argon filling protection structure of the embodiment of the present application is switched to the unfolded state;

[0019] Figure 3 is Figure 2 a partial schematic view of the structure shown;

[0020] Figure 4 is a structural schematic view of the argon filling protection structure of the embodiment of the present application when switched to the unfolded state;

[0021] Figure 5 is a structural schematic view of the argon filling protection structure of the embodiment of the present application when unfolded and laid out;

[0022] Figure 6 is a structural schematic view of a support and adjusting structure of an embodiment of the present application;

[0023] Figure 7 is a sectional view schematic view of a sliding sleeve of an embodiment of the present application;

[0024] Figure 8 is a structural schematic view of a support body of an embodiment of the present application;

[0025] Figure 9 is Figure 8 is a sectional view schematic view of a support body of an embodiment of the present application;

[0026] Figure 10 is a sectional view schematic view of a support of an embodiment of the present application.

[0027] Reference signs:

[0028] Support 100, support body 110, first pivot hole 111, second rope passing hole 112, support 120, second pivot hole 121, connecting rod 122, first rope passing hole 123, argon protection structure 200, side wall 210, end wall 220, first end wall part 221, second end wall part 222, first crease 230, second crease 240, splicing seam 250, first extension part 260, first connecting part 261, third crease 270, sliding sleeve 310, second connecting part 311, threaded through hole 312, second extension part 313, threaded locking piece 320. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are exemplary only, and are used only for explaining the present application, and cannot be understood as limiting the present application.

[0030] In the description of the present application, it should be understood that, if the orientation description is involved, for example, the orientation or position relationship indicated by the up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0031] In the description of the present application, if the words such as several, more than, less than, exceed, above, below, within, etc. appear, the meaning of several is one or more, the meaning of more than is two or more, more than, less than, exceed, etc. are understood as not including the number, above, below, within, etc. are understood as including the number.

[0032] In the description of the present application, if the first, second, etc. words appear, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0034] The specific structure of the auxiliary device for pipe fixed opening argon arc welding of the embodiments of the present application will be described in detail below, wherein the orientations involved in the following description should be understood based on the perspective of the argon filling protection structure 200 of the auxiliary device for pipe fixed opening argon arc welding switching to the unfolded state, and these orientations are based on the markings in the drawings.

[0035] Referring to Figures 1 to 10 , the auxiliary device for pipe fixed opening argon arc welding according to the embodiments of the present application comprises a support 100, an argon filling protection structure 200 and an adjusting structure.

[0036] The lower part of the support 100 can be arranged in the weld opening of the pipe, the argon filling protection structure 200 is arranged on the lower part of the support 100, the argon filling protection structure 200 has a folded state and an unfolded state, the argon filling protection structure 200 can pass through the weld opening of the pipe and enter the inside of the pipe body when switching to the folded state, the argon filling protection structure 200 is in the form of a cavity structure with an open top when switching to the unfolded state, so that the argon filling protection structure 200 can form a space for filling argon with the inner wall of the pipe body after passing through the weld opening of the pipe and entering the inside of the pipe body, the adjusting structure is arranged on the support 100, and the adjusting structure is used to drive the argon filling protection structure 200 to switch between the folded state and the unfolded state.

[0037] The auxiliary device for pipe fixed opening argon arc welding of the embodiment of the application can assist the operator to perform the argon arc welding operation on the pipe fixed opening without polluting the inner wall of the pipe. When in use, first, the argon filling protection structure 200 is switched to the folded state through the adjusting structure, then the lower part of the support 100 together with the argon filling protection structure 200 switched to the folded state is passed through the weld joint of the pipe and enters the inside of the pipe body, then the argon filling protection structure 200 is switched to the unfolded state through the adjusting structure, then the space for filling argon is formed by the argon filling protection structure 200 switched to the unfolded state and the inner wall of the pipe body. At this time, after the space formed by the argon filling protection structure 200 switched to the unfolded state and the inner wall of the pipe body is filled with argon, the argon arc welding operation can be performed. Compared with the prior art, it is not necessary to fill argon in the whole pipe, thereby being conducive to reducing the cost. At the same time, it is not necessary to additionally use a conventional temporary plugging material to temporarily plug the weld joint of the pipe, thereby being capable of effectively avoiding the problem that the temporary plugging material cannot be removed after the welding is completed in the prior art. In addition, it is also capable of effectively avoiding a series of problems caused by the use of the self-shield flux-cored wire welding in the prior art. It should be noted that when the to-be-welded area covered by the argon filling protection structure 200 is completed, the auxiliary device for pipe fixed opening argon arc welding of the embodiment of the application is moved so that the argon filling protection structure 200 covers other to-be-welded areas to continue the welding operation. When the space of the remaining to-be-welded area is just enough for the argon filling protection structure 200 switched to the folded state to be taken out from the inside of the pipe body, or when the space of the remaining to-be-welded area is slightly larger than the space required for the argon filling protection structure 200 switched to the folded state to be taken out from the inside of the pipe body, the argon filling protection structure 200 is switched to the folded state through the adjusting structure, then the argon filling protection structure 200 switched to the folded state is taken out from the inside of the pipe body, and finally the welding operation is performed on the remaining to-be-welded area which has not been completed (at this time, whether it is necessary to locally fill argon in the pipe depends on the specific circumstances).

[0038] Reference Figures 1 to 6 and Figures 8 to 10In some of the embodiments, the cross section of the argon-filled protection structure 200 is V-shaped when the argon-filled protection structure 200 is switched to the unfolded state, the argon-filled protection structure 200 has two side walls 210 and two end walls 220, the two side walls 210 are foldable along the joint between the two side walls 210, the end wall 220 is foldable along the joint between the end wall 220 and the side wall 210, the middle part of the end wall 220 is foldable, the top part of the side wall 210 is provided with a first extension 260, the first extension 260 is foldable along the joint between the first extension 260 and the side wall 210, the support 100 includes a support body 110 and two support members 120, one end of each of the two support members 120 is rotatably connected to the lower part of the opposite sides of the support body 110 through a pivot shaft (not shown in the figure), specifically, the support body 110 is provided with a first pivot hole 111 corresponding to the pivot shaft, the support member 120 is provided with a second pivot hole 121 corresponding to the pivot shaft, one end of one of the support members 120 away from the support body 110 is connected to one of the first extensions 260, one end of the other support member 120 away from the support body 110 is connected to the other first extension 260, when both of the support members 120 are rotated to a first position in which the length direction of each of the support members 120 is parallel to the length direction of the support body 110, the two support members 120 can drive the argon-filled protection structure 200 to switch to the folded state, when both of the support members 120 are rotated to a second position in which the length direction of each of the support members 120 has a preset included angle with the length direction of the support body 110, the two support members 120 can drive the argon-filled protection structure 200 to switch to the unfolded state, specifically, the preset included angle is preferably 90°, the adjusting structure can drive both of the support members 120 to rotate relative to the support body 110, so as to drive both of the support members 120 to switch between the first position and the second position. The above structure is simple and easy to operate, when in use, the two support members 120 can be driven to rotate relative to the support body 110 through the adjusting structure, during the switching process of the two support members 120 relative to the support body 110 between the first position and the second position, the two rotating support members 120 can drive the two side walls 210 of the argon-filled protection structure 200 to fold along the joint between the two side walls 210, so as to make the upper parts of the two side walls 210 close to or away from each other, thereby driving the end wall 220 to fold along the joint between the end wall 220 and the side wall 210 and driving the middle part of the end wall 220 to fold, wherein the first extension 260 and the side wall 210 can fold along the joint between the first extension 260 and the side wall 210 during the rotation of the support member 120, so as to make the first extension 260 adapt to the position change of the support member 120.

[0039] Referring to Figure 1 and Figure 2In some embodiments, the number of the supports 100 is one, and the support 100 is arranged at one end of the argon-filled protection structure 200. Compared with the case of arranging multiple supports 100, the space required for taking out the argon-filled protection structure 200 in the folded state from the inside of the pipe body is reduced, thereby reducing the remaining welding area to be welded after the argon-filled protection structure 200 is taken out from the inside of the pipe body, and further improving the welding quality. Specifically, the space of the remaining welding area to be welded is only slightly larger than the maximum width of the argon-filled protection structure 200 in the folded state. When the argon-filled protection structure 200 needs to be taken out from the inside of the pipe body, the argon-filled protection structure 200 in the folded state is rotated from the state of being perpendicular to the radius of the pipe body to the state of being parallel to the radius of the pipe body, and then the argon-filled protection structure 200 in the folded state is taken out from the inside of the pipe body along the radius of the pipe body.

[0040] Referring to Figures 1 to 5 In some embodiments, the junction of the two side walls 210 is provided with a first crease 230, so that the two side walls 210 can be folded along the junction thereof. The junction of the end wall 220 and the side wall 210 is provided with a second crease 240, so that the end wall 220 and the side wall 210 can be folded along the junction thereof. The end wall 220 is a split structure, and the end wall 220 includes a first end wall part 221 and a second end wall part 222 which are movably connected to each other. The junction of the first end wall part 221 and the second end wall part 222 forms a vertical joint seam 250, so that the middle part of the end wall 220 can be folded. The junction of the first extension part 260 and the side wall 210 is provided with a third crease 270, so that the first extension part 260 and the side wall 210 can be folded along the junction thereof. By arranging the end wall 220 as a split structure, the argon-filled protection structure 200 can be folded from a metal sheet which is cut according to the outer shape of the argon-filled protection structure 200 after being unfolded and laid flat, thereby reducing the processing difficulty of the argon-filled protection structure 200. Specifically, the first end wall part 221 and the second end wall part 222 are symmetrically arranged with the joint seam 250 as the axis of symmetry. The first end wall part 221 and the second end wall part 222 are movably connected to each other by means of a high-temperature-resistant adhesive tape. Of course, the first end wall part 221 and the second end wall part 222 can also be movably connected to each other by means of a flexible metal sheet or a hinge, which is not limited herein.

[0041] It should be noted that in some other embodiments, the end wall 220 can also be a one-piece structure. Correspondingly, the joint seam 250 in the middle part of the end wall 220 needs to be replaced by a crease, and one of the two second creases 240 corresponding to the end wall 220 needs to be replaced by a joint seam.

[0042] Referring toFigure 2 And Figure 4 In some embodiments, the top of the first extension 260 is arc-shaped, so that the top of the first extension 260 can be attached to the inner wall of the pipe body, which is conducive to improving the sealing performance of the space enclosed by the expanded argon-filling protection structure 200 and the inner wall of the pipe body, thereby preventing the argon from escaping, and further reducing the consumption of argon during the welding operation.

[0043] Referring to Figures 2 to 5 In some embodiments, the top of the first extension 260 is provided with a first connecting portion 261 extending towards the inner side, and the end of the support 120 away from the bracket body 110 is connected to the bottom of the first connecting portion 261. By providing the first connecting portion 261, the contact area of the connection between the first extension 260 and the support 120 can be increased, which is conducive to reducing the connection difficulty of the first extension 260 and the support 120, and improving the stability and reliability of the connection between the first extension 260 and the support 120. The end of the support 120 away from the bracket body 110 is connected to the bottom of the first connecting portion 261, so that the support 120 does not hinder the top of the first extension 260 from being attached to the inner wall of the pipe body. Specifically, the first connecting portion 261 is a sheet-shaped structure bent towards the inner side of the first extension 260, so that the argon-filling protection structure 200 with the first connecting portion 261 added can still be folded from a whole metal sheet. In addition, the first connecting portion 261 and the support 120 are connected, of course, the first connecting portion 261 and the support 120 can also be bonded or connected by bolts, which is not limited here.

[0044] It should be noted that in some embodiments, the adjusting structure includes a pull rope (not shown in the figure), one end of the pull rope is connected to the end of the support 120 away from the bracket body 110, and the other end of the pull rope and the bracket body 110 are provided with a connecting structure. The connecting structure can adjust the connection position of the end of the pull rope away from the support 120 up and down along the length direction of the bracket body 110. The above structure is simple and easy to operate. In use, the connection position of the end of the pull rope away from the support 120 is adjusted up and down along the length direction of the bracket body 110 by the connecting structure, so that the two supports 120 can be driven to rotate relative to the bracket body 110, so as to drive the two supports 120 to switch between the first position and the second position, and further drive the argon-filling protection structure 200 to switch between the folded state and the expanded state.

[0045] Referring to Figures 1 to 3 And Figure 6 And Figure 7In some embodiments, the connecting structure comprises a sliding sleeve 310 and a locking structure. The sliding sleeve 310 is slidably sleeved on the support body 110, and the side of the sliding sleeve 310 is provided with a second connecting part 311. The end of the pull rope away from the support 120 is connected to the second connecting part 311. The locking structure has a locked state and an unlocked state. When the locking structure is switched to the locked state, the sliding sleeve 310 is limited to slide up and down relative to the support body 110. When the locking structure is switched to the unlocked state, the sliding sleeve 310 is released from the limitation. The above structure is simple and easy to operate. Specifically, the locking structure comprises a threaded locking piece 320. The side of the sliding sleeve 310 is provided with a threaded through hole 312. The threaded locking piece 320 is threadedly connected to the threaded through hole 312. Rotating the threaded locking piece 320 can make the end of the threaded locking piece 320 abut against the side of the support body 110 to limit the sliding sleeve 310 to slide up and down relative to the support body 110. At the same time, rotating the threaded locking piece 320 can make the end of the threaded locking piece 320 separate from the side of the support body 110 to release the sliding sleeve 310 from the limitation. When it is necessary to adjust the connection position of the end of the pull rope away from the support 120 to the support body 110 in the length direction of the support body 110, the threaded locking piece 320 is released from the limitation of the sliding sleeve 310, and the sliding sleeve 310 is slid to the required position. Then, the sliding sleeve 310 is re-limited to slide up and down relative to the support body 110 by the threaded locking piece 320.

[0046] It should be noted that in some other embodiments, the locking structure comprises a latch. The side of the sliding sleeve 310 is provided with a avoiding through hole corresponding to the latch. The latch is arranged in the avoiding through hole. The support body 110 is provided with a plurality of positioning holes corresponding to the latch. The plurality of positioning holes are arranged up and down along the length direction of the support body 110. When it is necessary to adjust the connection position of the end of the pull rope away from the support 120 to the support body 110 in the length direction of the support body 110, the latch arranged in the avoiding through hole is inserted into different positioning holes.

[0047] Referring to Figures 1 to 3 and Figure 6In some embodiments, the second extension 313 is arranged on opposite sides of the sliding sleeve 310, and the length direction of the second extension 313 forms an angle with the length direction of the argon-filled protection structure 200. Specifically, the angle between the length direction of the second extension 313 and the length direction of the argon-filled protection structure 200 is 90°, which is conducive to preventing the second extension 313 from hindering the welding operation. By adjusting the pull rope, the auxiliary device for argon arc welding of a pipe fixed opening of the embodiments can abut against the outer wall of the pipe body when in operation, thereby fixing the auxiliary device for argon arc welding of a pipe fixed opening of the embodiments, i.e., without the need for the operator to apply force to the support body 110 to maintain the working position of the auxiliary device for argon arc welding of a pipe fixed opening of the embodiments.

[0048] It should be noted that in some other embodiments, the second extension 313 can also be arranged on the support body 110.

[0049] It should be noted that in some other embodiments, the second connection portion 311 can also be directly arranged on the side of the support body 110. Specifically, the number of the second connection portions 311 is multiple, and the multiple second connection portions 311 are arranged in an up-down interval along the length direction of the support body 110. At this time, the sliding sleeve 310 described above is not needed.

[0050] Referring to Figure 2 , Figure 3 , Figure 6 and Figures 8 to 10 In some embodiments, the support body 110 and the support piece 120 are both pipe structures. The support piece 120 is provided with a connecting rod 122 for connecting the pull rope at the end away from the support body 110. The support piece 120 is provided with a first rope passing hole 123 at the end away from the first extension 260. The support body 110 is provided with a second rope passing hole 112 corresponding to the first rope passing hole 123. The top of the support body 110 is an open structure. Specifically, one end of the pull rope is connected to the connecting rod 122. The other end of the pull rope passes through the first rope passing hole 123 and then passes into the inside of the support body 110 and passes through the inside of the support body 110 until it passes out of the opening at the top of the support body 110 and is finally connected to the connecting structure on the support body 110. The above structure makes the pull rope have a part inside the support piece 120 and a part inside the support body 110, which not only can tension the pull rope, but also can reduce the part of the pull rope outside, thereby preventing the part of the pull rope outside from hindering the welding operation, and protecting the part of the pull rope inside the support piece 120 and the support body 110.

[0051] It should be noted that in some other embodiments, the argon-filling protection structure can also be a flexible cavity structure with a top opening supported by a memory metal. In use, the argon-filling protection structure is first squeezed to switch to a folded state, and then the argon-filling protection structure can pass through the weld opening of the pipe and enter the inside of the pipe body. Then the memory metal returns to its original state to switch the argon-filling protection structure in the inside of the pipe body to an unfolded state, i.e., to return to the cavity structure with a top opening, so that the argon-filling protection structure can be surrounded by the inner wall of the pipe body to form a space for filling argon.

[0052] In the description of the present specification, if the description involves the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" and "some examples", it means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An auxiliary device for pipe fixing opening argon arc welding, characterized in that, The utility model relates to a kind of filling argon protection structure and its adjusting structure, including: Support (100), the lower part of the support (100) can be worn in the weld port of pipeline; Argon-filled protection structure (200), the lower part of the support (100) is provided with the argon-filled protection structure (200), the argon-filled protection structure (200) has folding state and unfolding state, the argon-filled protection structure (200) can pass through the weld port of pipeline and enter the inside of pipe body when switching to folding state, the argon-filled protection structure (200) is cavity structure when switching to unfolding state Top opening, so that the argon-filled protection structure (200) can be formed with the inner wall of pipe body after passing through the weld port of pipeline and entering the inside of pipe body Space for filling argon; Adjusting structure, the adjusting structure is provided on the support (100), and the adjusting structure is used to drive the argon-filled protection structure (200) to switch between folding state and unfolding state; The outer shape of the cross section of the argon-filled protection structure (200) is V-shaped when switching to unfolding state, the argon-filled protection structure (200) has two side walls (210) and two end walls (220), two side walls (210) can be folded along the junction of two, the end wall (220) can be folded along the junction of two with the side wall (210), the middle part of the end wall (220) can be folded, the top of the side wall (210) is provided with first extension (260), the first extension (260) can be folded along the junction of two with the side wall (210), the support (100) includes support body (110) and two support pieces (120), one end of two support pieces (120) is rotatably connected to the lower part of the opposite side of support body (110) respectively, one of the support pieces (120) is connected to one of the first extensions (260) away from the one end of the support body (110), the other support piece (120) is connected to the other first extension (260) away from the one end of the support body (110), two support pieces (120) can drive the argon-filled protection structure (200) to switch to folding state when rotating to the first position that the length direction of itself is parallel to the length direction of the support body (110), two support pieces (120) can drive the argon-filled protection structure (200) to switch to unfolding state when rotating to the second position that the length direction of itself has preset included angle with the length direction of the support body (110), the adjusting structure can drive two support pieces (120) to switch between the first position and the second position.

2. The auxiliary device for pipe fixing opening argon arc welding according to claim 1, characterized in that, The number of the support (100) is one, and the support (100) is arranged at one end of the argon-filled protection structure (200).

3. The auxiliary device for pipe fixing opening argon arc welding according to claim 1, characterized in that, The junction of the two side walls (210) is provided with a first crease (230), the junction of the end wall (220) and the side wall (210) is provided with a second crease (240), the end wall (220) is a split structure, the end wall (220) comprises a first end wall part (221) and a second end wall part (222) movably connected with each other, the junction of the first end wall part (221) and the second end wall part (222) forms a vertical splicing joint (250), and the junction of the first extension part (260) and the side wall (210) is provided with a third crease (270).

4. The auxiliary device for pipe fixing opening argon arc welding according to claim 1, characterized in that, The top of the first extension part (260) is arc-shaped, so that the top of the first extension part (260) can be attached to the inner wall of the pipe body.

5. The auxiliary device for pipe fixing opening argon arc welding according to claim 4, characterized in that, The top of the first extension part (260) is provided with a first connecting part (261) extending towards the inside, and one end of the support piece (120) away from the support body (110) is connected to the bottom of the first connecting part (261).

6. The apparatus for pipe joint argon arc welding according to claim 1, wherein The adjusting structure comprises a pull rope, one end of the pull rope is connected to one end of the support piece (120) away from the support body (110), and the other end of the pull rope and the support body (110) are provided with a connecting structure, and the connecting structure can adjust the connection position of the other end of the pull rope away from the support piece (120) up and down along the length direction of the support body (110).

7. The auxiliary device for pipe fixing opening argon arc welding according to claim 6, characterized in that, The connecting structure comprises a sliding sleeve (310) and a locking structure, the sliding sleeve (310) is slidably sleeved on the support body (110), the side of the sliding sleeve (310) is provided with a second connecting part (311), the other end of the pull rope away from the support piece (120) is connected to the second connecting part (311), the locking structure has a locked state and an unlocked state, when the locking structure is switched to the locked state, the sliding sleeve (310) can be limited to slide up and down relative to the support body (110), and when the locking structure is switched to the unlocked state, the limitation on the sliding sleeve (310) is removed.

8. The auxiliary device for pipe fixing opening argon arc welding according to claim 7, characterized in that, The opposite sides of the sliding sleeve (310) are provided with second extension parts (313), and the length direction of the second extension parts (313) and the length direction of the argon-filled protection structure (200) form an included angle.

9. The auxiliary device for pipe fixing opening argon arc welding according to claim 6, characterized in that, The support body (110) and the support piece (120) are both pipe structures, one end of the support piece (120) away from the support body (110) is provided with a connecting rod (122) for connecting the pull rope, one end of the support piece (120) away from the first extension part (260) is provided with a first rope passing hole (123), the support body (110) is provided with a second rope passing hole (112) corresponding to the first rope passing hole (123), and the top of the support body (110) is an open structure.

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