Water separator welding airtight integrated device

Abstract

The present invention discloses an integrated gas-tight device for welding a manifold, comprising: a frame; a main pipe positioning module, a branch pipe positioning module, which comprises a lifting drive, a rotating drive mechanism, a driving plate and a branch pipe plug column, the number of the branch pipe plug columns is multiple, and the rotating drive mechanism drives the branch pipe plug column to rotate around its own axis; a welding module, which comprises a transverse drive, a telescopic drive, a clamping jaw drive and a welding gun assembly, the clamping jaw drive and the welding gun assembly are detachably connected, and the clamping jaw drive is used to clamp the welding gun assembly on the branch pipe plug column; an airtight detection module, and the airtight detection module is used to close the main pipe and pass gas. The welding module enables the welding gun assembly to be fixed on different branch pipe plug columns through the transverse drive, the telescopic drive and the clamping jaw drive, and there is no need to repeatedly perform multiple positioning when welding the manifold pipe, and there is no need to additionally seal the manifold pipe during subsequent airtight detection, which greatly improves efficiency.

Description

Technical Field

[0001] The invention relates to the field of pipeline manufacturing, and in particular to a welded airtight integrated device for a water distributor. Background Art

[0002] The water divider is a commonly used component in the field of pipeline connection. The water divider includes a collecting pipe and a plurality of diverter pipes connected to the collecting pipe. When processing the water divider, the method currently adopted by most people is to weld the diverter pipes to the collecting pipe one by one. Specifically, a module including a diverter pipe positioning block and a welding gun mechanism fixes and welds the diverter pipes one by one. In this welding method, each time a diverter pipe is welded, it is necessary to reload the material once, and the welding efficiency is not high. In addition, the diverter pipe needs to be sealed when the airtightness test of the diverter formed after welding is performed later. The process is relatively complicated and there is still room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] The present invention provides a water divider welded airtight integrated device, comprising:

[0005] frame;

[0006] A main pipe positioning module, comprising a main pipe positioning block, wherein the main pipe positioning block is arranged on the frame;

[0007] The branch-management positioning module comprises a lifting drive, a rotating drive mechanism, a driving plate and a branch-management plug column, wherein the lifting drive is arranged on the frame, the lifting drive is drivingly connected to the driving plate, the rotating drive mechanism is arranged on the driving plate, the branch-management plug column is in multiple numbers, the branch-management plug column is rotationally connected to the driving plate, the branch-management plug columns all extend toward the main-management positioning block, and the rotating drive mechanism drives the branch-management plug column to rotate around its own axis;

[0008] A welding module, comprising a transverse drive, a telescopic drive, a clamping drive and a welding gun assembly, wherein the transverse drive is arranged on the frame, the transverse drive is drivingly connected to the telescopic drive, the telescopic drive is drivingly connected to the clamping drive, the clamping drive is detachably connected to the welding gun assembly, and the clamping drive is used to clamp the welding gun assembly on the branch plug column;

[0009] An airtight detection module is used to seal the main pipe and pass gas.

[0010] The beneficial effects of the present invention are as follows: the manifold welding airtight integrated device is equipped with a main pipe positioning module to position the collecting pipe, and a branch pipe positioning module is equipped to position multiple branch pipes on the collecting pipe at one time. The welding module enables the welding gun assembly to be fixed on different branch pipe plugs through the transverse drive, the telescopic drive and the clamping claw drive. The rotating drive mechanism and the welding gun are started at the same time to weld the branch pipes to the collecting pipe; therefore, on the one hand, there is no need to repeatedly perform multiple positioning when welding each branch pipe to the collecting pipe, and on the other hand, since the branch pipe plugs are always kept tightly inserted with the branch pipes during the welding process, there is no need to additionally seal the branch pipes when the airtight detection module is used for subsequent airtight detection, which greatly improves the detection efficiency.

[0011] As some sub-solutions of the above technical solution, the clamping jaw driver includes a first clamping plate and a second clamping plate that can be opened and closed; the welding gun assembly includes a first clamping arm, a second clamping arm, an elastic member and a welding gun, the middle parts of the first clamping arm and the second clamping arm are hinged to form a clamping jaw that can be opened and closed, the clamping jaw includes a connecting side and a clamping side, the elastic member is arranged between the first clamping arm and the second clamping arm, so that the clamping jaw has a tendency to close on the clamping side;

[0012] The first clamping plate is detachably connected to the first clamping arm at the connection side, the second clamping plate is detachably connected to the second clamping arm at the connection side, and the clamping jaw driver is used to release the tendency of the engagement.

[0013] As some sub-schemes of the above technical scheme, the branch pipe plug column includes a rotating column and a plug-in column, the rotation drive mechanism is transmission-connected to the rotating column, the plug-in column is located on the lower side of the rotating column, the plug-in column is adjacent to the main pipe positioning block, and the plug-in column is rotationally connected to the rotating column.

[0014] As some sub-schemes of the above technical scheme, the first clamping arm includes a first clamping portion, the first clamping portion is formed on the clamping side, and the first clamping portion is in a "V" shape; the second clamping arm includes a second clamping portion, the second clamping portion is formed on the clamping side, and the second clamping portion is in a "V" shape; the first clamping portion and the second clamping portion are arranged opposite to each other, and the rotating column is cylindrical.

[0015] As some sub-solutions of the above technical solution, a height positioning groove is formed on the rotating column.

[0016] As some sub-schemes of the above technical scheme, the cross-section of the height positioning groove is "V"-shaped, and the top edge and the bottom edge on the side opposite to the first clamp arm and the second clamp arm have the first chamfer and the second chamfer respectively, and the top edge and the bottom edge on the side opposite to the first clamp arm have the third chamfer and the fourth chamfer respectively.

[0017] As some sub-solutions of the above technical solution, a first arm groove is provided on the side opposite to the first clamping plate and the second clamping plate.

[0018] As some sub-solutions of the above technical solution, a friction pad is formed on the bottom surface of the first arm groove.

[0019] As some sub-schemes of the above technical scheme, the airtight detection module includes an air pump, a first plug driver, a second plug driver, an inflation plug and a sealing head, the inflation plug and the sealing head are respectively arranged on both sides of the main pipe positioning block, the first plug driver and the second plug driver are both arranged on the frame, the first plug driver is connected to the inflation plug driving, the second plug driver is connected to the sealing head driving, the air pump is arranged on the frame, the inflation plug is provided with an inflation channel, and the air outlet end of the air pump is connected to the inflation channel.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure after cross section at A.

[0024] In the attached drawings: 11-main pipe positioning block; 21-lifting drive; 22-rotation drive mechanism; 23-drive plate; 24-branch plug column; 241-rotating column; 2411-height positioning slot; 242-plug column; 31-transverse drive; 32-telescopic drive; 33-grip drive; 331-first clamping plate; 3311-first arm slot; 332-second clamping plate; 341-first clamping arm; 3411-first clamping part; 342-second clamping arm; 3421-second clamping part; 343-welding gun; 35-friction pad; 41-inflatable plug; 42-sealing plug. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, the meaning of "several" is an indefinite quantity, the meaning of "multiple" is more than two, "greater than", "less than", "exceed", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of the first and the second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. The "and / or" that appears in the full text represents three parallel solutions. For example, A and / or B represents the solution satisfied by A, the solution satisfied by B, or the solution satisfied by both A and B.

[0028] In the description of the present invention, if there is a short sentence containing multiple parallel features, the attributive defines the closest feature, for example: B, C, and E connected to D are arranged on A, which means that B is arranged on A and E is connected to D, and does not constitute a limitation on C; but attributives that indicate the relationship between features, such as "interval arrangement" and "circular arrangement", do not belong to this category. If the word "all" is preceded by an attributive, it means that all features in the short sentence are limited, such as B, C, and D are all arranged on A, which means that B, C, and D are all arranged on A. For a sentence with an omitted subject, the omitted subject is the subject of the previous sentence, that is, B is arranged on A, including C, which means that B is arranged on A and A includes C.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Combine the following Figure 1 to Figure 2 Embodiments of the present invention are described.

[0031] This embodiment relates to a water separator welded airtight integrated device, comprising:

[0032] A rack (not shown);

[0033] A main pipe positioning module, comprising a main pipe positioning block 11, wherein the main pipe positioning block 11 is arranged on the frame;

[0034] The branch-manage positioning module comprises a lifting drive 21, a rotating drive mechanism 22, a driving plate 23 and a branch-manage plug column 24. The lifting drive 21 is arranged on the frame, the lifting drive 21 is drivingly connected to the driving plate 23, the rotating drive mechanism 22 is arranged on the driving plate 23, the branch-manage plug column 24 is in multiple numbers, the branch-manage plug column 24 is rotationally connected to the driving plate 23, the branch-manage plug column 24 all extends toward the main-manage positioning block 11, and the rotating drive mechanism 22 drives the branch-manage plug column 24 to rotate around its own axis;

[0035] The welding module includes a transverse drive 31, a telescopic drive 32, a clamping drive 33 and a welding gun assembly. The transverse drive 31 is arranged on the frame, the transverse drive 31 is drivingly connected to the telescopic drive 32, the telescopic drive 32 is drivingly connected to the clamping drive 33, the clamping drive 33 is detachably connected to the welding gun assembly, and the clamping drive 33 is used to clamp the welding gun assembly on the branch plug column 24;

[0036] An airtight detection module is used to seal the main pipe and pass gas.

[0037] The integrated airtight welding device of the manifold is equipped with a main pipe positioning module to position the collecting pipe, and a branch pipe positioning module to position multiple branch pipes on the collecting pipe at one time. The welding module enables the welding gun assembly to be fixed on different branch pipe plugs 24 through the transverse drive 31, the telescopic drive 32 and the clamping claw drive 33. The rotating drive mechanism and the welding gun 343 can be started at the same time to weld the branch pipes to the collecting pipe; therefore, on the one hand, there is no need to repeatedly perform multiple positioning when welding each branch pipe to the collecting pipe, and on the other hand, because the branch pipe plug 24 always keeps the branch pipe tightly inserted during the welding process, there is no need to additionally seal the branch pipe when the airtight detection module is used for airtight detection later, which greatly improves the detection efficiency.

[0038] Further, the clamping jaw driver 33 includes a first clamping plate 331 and a second clamping plate 332 that can be opened and closed; the welding gun assembly includes a first clamping arm 341, a second clamping arm 342, an elastic member (not shown in the figure) and a welding gun 343, the first clamping arm 341 and the second clamping arm 342 are hinged at their middle parts to form a clamping jaw that can be opened and closed, the clamping jaw includes a connecting side and a clamping side, the elastic member is arranged between the first clamping arm 341 and the second clamping arm 342, so that the clamping jaw has a tendency to close on the clamping side;

[0039] The first clamping plate 331 is detachably connected to the first clamping arm 341 at the connection side, the second clamping plate 332 is detachably connected to the second clamping arm 342 at the connection side, and the clamping jaw driver 33 is used to release the tendency of the engagement.

[0040] The welding gun assembly is provided with a first clamping arm 341, a second clamping arm 342 and an elastic member to form a clamping claw with a tendency to close together. The welding gun 343 fixed on the first clamping arm 341 can be clamped on the branch pipe plug column 24, and cooperate with the rotating branch pipe plug column 24 to achieve ring welding; the transverse drive 31, the telescopic drive 32 and the clamping claw drive 33 cooperate with each other to realize switching the welding gun assembly to different branch pipe plug columns 24, so that the shunt pipes can be welded one by one while positioning multiple shunt pipes at one time, without the need for multiple shunt pipe positioning, thereby improving welding efficiency.

[0041] The state where the welding gun assembly is not connected to the branch plug column 24 is the initial state, and the state where the welding gun assembly is connected to the branch plug column 24 is the welding state. In the initial state, the clamping claw driver 33 clamps the first clamping arm 341 and the second clamping arm 342, so that the clamping side remains in an open state, and the telescopic driver 32 drives the clamping claw driver 33 and the welding gun assembly to extend toward the branch plug column 24, and then the clamping claw driver 33 drives the first clamping plate 331 and the second clamping plate 332 away, and the first clamping arm 341 and the second clamping arm 342 clamp the branch plug column 24 under the action of the elastic member, and then the telescopic driver 32 drives the clamping claw driver 33 to leave the connection side of the clamping claw to avoid hindering the rotation of the welding gun assembly; in this state, the rotation of the branch positioning column can achieve ring welding. When it is necessary to switch to a different branch plug column 24, the telescopic driver 32 drives the clamp driver 33 to move toward the clamping claw, and the clamp driver 33 drives the first clamp plate 331 and the second clamp plate 332 to move closer, so that the clamping side is opened, and the telescopic driver 32 retracts to restore the welding gun assembly to its initial state, and then the transverse driver 31 drives the transverse movement to the corresponding position of another branch plug column 24, where the other branch plug column 24 is clamped by the telescopic driver 32 and the clamp driver 33.

[0042] The rotary drive mechanism 22 drives each branch plug column 24 to rotate by means of a belt drive through a drive motor, or each branch plug column 24 can be equipped with a drive motor. The lifting drive 21 can be a pneumatic push rod, an electric push rod, a hydraulic push rod, a linear module, a linear module, a screw mechanism, etc., and its main function is to provide an output end for linear motion. In this embodiment, the lifting drive 21 is a cylinder, and the cylinder can share the air supply source of the airtight detection module as a power device. The lifting drive 21 is used to extend the branch plug column 24 into the shunt pipe and position and fix the shunt pipe.

[0043] Furthermore, the branch pipe plug column 24 includes a rotating column 241 and a plug column 242, the rotating drive mechanism 22 is transmission-connected with the rotating column 241, the plug column 242 is located at the lower side of the rotating column 241, the plug column 242 is adjacent to the main pipe positioning block 11, and the plug column 242 is rotationally connected with the rotating column 241. The branch pipe plug column 24 is configured with the rotating column 241 and the plug column 242, and when the welding gun 343 clamps the rotating column 241, since the rotating column 241 is rotationally connected with the plug column 242, when the rotating drive mechanism drives the rotating column 241 to rotate, the plug column 242 can remain fixed with the shunt pipe without relative rotation, which is beneficial to improve the positioning accuracy of the shunt pipe. The manner in which the plug-in column 242 and the rotating column 241 are rotationally connected is specifically shown in the figure. An annular groove is formed at the lower portion of the rotating column 241, and a disc is formed on the upper side of the plug-in column 242. The disc is arranged in the annular groove, and plane bearings can also be arranged on the upper and lower sides of the disc, so that the torque of the branch plug-in column 24 rotating is not transmitted to the plug-in column 242, thereby further reducing the influence of the rotation of the rotating column 241 on the plug-in column 242.

[0044] Furthermore, the first clamping arm 341 includes a first clamping portion 3411, which is formed on the clamping side and is in a "V" shape. The second clamping arm 342 includes a second clamping portion 3421, which is formed on the clamping side and is in a "V" shape. The first clamping portion 3411 and the second clamping portion 3421 are arranged opposite to each other, and the rotating column 241 is cylindrical. The first clamping portion 3411 and the second clamping portion 3421 are both in a "V" shape, so that when clamping the external branch plug column 24, the alignment between the first clamping arm 341 and the second clamping arm 342 and the axis of the branch plug column 24 in the clamping state can be ensured, and then when the branch plug column 24 rotates, the center of the rotation trajectory of the welding gun 343 can be ensured to fall on the center of the shunt pipe, thereby improving the welding accuracy.

[0045] Furthermore, a height positioning groove 2411 is formed on the rotating column 241. By configuring the height positioning groove 2411 on the rotating column 241, the clamping claw can be positioned in the height direction when clamping the rotating column 241, thereby improving the positioning accuracy of the height position of the welding gun 343.

[0046] Furthermore, the cross section of the height positioning groove 2411 is in a "V" shape, and the top and bottom edges on the side opposite to the first clamp arm 341 and the second clamp arm 342 respectively have a first chamfer and a second chamfer, and the top and bottom edges on the side opposite to the first clamp arm 342 and the first clamp arm 341 respectively have a third chamfer and a fourth chamfer. By forming the first chamfer and the second chamfer, when the first clamp arm 341 cooperates with the groove preset on the external branch plug column 24, the height position of the welding gun assembly can be limited, thereby limiting the height position of the welding gun 343. A third chamfer and a fourth chamfer are formed on the second clamp arm 342, which cooperate with the first chamfer and the second chamfer formed on the first clamp arm 341 to limit the height position of the welding gun 343. When the chamfer structures are formed on the first clamp arm 341 and the second clamp arm 342, on the one hand, a full circle of grooves can be preset on the external diverter positioning column to cooperate with the above-mentioned chamfer structures, and the matching diverter positioning column is relatively simple to process. On the other hand, the first clamp arm 341 and the second clamp arm 342 do not need to perform circumferential positioning when clamping the diverter positioning column, and the operation is convenient.

[0047] Furthermore, a first arm slot 3311 is provided on the side opposite to the second clamping plate 332. The first arm slot 3311 is provided on the first clamping plate 331 to limit the height position of the first clamping arm 341 when clamping the first clamping arm 341, so as to ensure the height position of the welding gun 343.

[0048] Furthermore, a friction pad 35 is formed on the bottom surface of the first arm slot 3311. By configuring the friction pad 35, the friction force between the first arm slot 3311 and the first clamping arm 341 is increased, which is conducive to improving the clamping stability. The friction pad 35 can be specifically made of a rubber pad, a silicone pad, etc.

[0049] Further, the airtight detection module includes an air pump (not shown in the figure), a first plug driver (not shown in the figure), a second plug driver (not shown in the figure), an air-filled plug 41 and a sealing head 42, wherein the air-filled plug 41 and the sealing head 42 are respectively arranged on both sides of the main pipe positioning block 11, the first plug driver and the second plug driver are both arranged on the frame, the first plug driver is drivingly connected to the air-filled plug 41, the second plug driver is drivingly connected to the sealing head 42, the air pump is arranged on the frame, an air-filled plug 41 is provided with an air-filled channel, and the air outlet end of the air pump is connected to the air-filled channel. In the present embodiment, the first plug driver and the second plug driver are both cylinders, and the plug driver is drivingly connected to the air-filled plug 41. The first plug driver and the second plug driver both use cylinders and use air pumps as power sources, which is relatively low in cost. When an airtightness test is required, the first plug driver and the second plug driver respectively drive the inflation plug 41 and the sealing head 42 to extend toward the collecting pipe placed on the main pipe positioning block 11, closing the two ends of the collecting pipe, and then the air pump supplies air through the inflation plug 41 to detect the air pressure in the pipe. Based on the air pressure in the pipe, it can be determined whether the airtightness of the diverter formed after welding is qualified.

[0050] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. The water distributor is welded and airtight integrated, characterized in that: include: frame; A main pipe positioning module, comprising a main pipe positioning block (11), wherein the main pipe positioning block (11) is arranged on the frame; The branch pipe positioning module comprises a lifting drive (21), a rotating drive mechanism (22), a driving plate (23) and a branch pipe plug column (24), wherein the lifting drive (21) is arranged on the frame, the lifting drive (21) is drivingly connected to the driving plate (23), the rotating drive mechanism (22) is arranged on the driving plate (23), the branch pipe plug column (24) is in plurality, the branch pipe plug column (24) is rotationally connected to the driving plate (23), the branch pipe plug column (24) all extend toward the main pipe positioning block (11), and the rotating drive mechanism (22) drives the branch pipe plug column (24) to rotate around its own axis; A welding module, comprising a transverse drive (31), a telescopic drive (32), a clamping drive (33) and a welding gun assembly, wherein the transverse drive (31) is arranged on the frame, the transverse drive (31) is drivingly connected to the telescopic drive (32), the telescopic drive (32) is drivingly connected to the clamping drive (33), the clamping drive (33) is detachably connected to the welding gun assembly, and the clamping drive (33) is used to clamp the welding gun assembly on the branch pipe plug column (24); An airtightness detection module, the airtightness detection module is used to seal the main pipe and pass gas; The clamping jaw driver (33) comprises a first clamping plate (331) and a second clamping plate (332) that can be opened and closed; the welding gun assembly comprises a first clamping arm (341), a second clamping arm (342), an elastic member and a welding gun (343); the middle parts of the first clamping arm (341) and the second clamping arm (342) are hinged to form a clamping jaw that can be opened and closed; the clamping jaw comprises a connecting side and a clamping side; the elastic member is arranged between the first clamping arm (341) and the second clamping arm (342) so that the clamping jaw has a tendency to close on the clamping side; The first clamping plate (331) is detachably connected to the first clamping arm (341) at the connection side, the second clamping plate (332) is detachably connected to the second clamping arm (342) at the connection side, and the clamping jaw driver (33) is used to release the tendency of the engagement; The branch pipe plug column (24) comprises a rotating column (241) and a plug column (242), the rotary drive mechanism (22) is transmission-connected to the rotating column (241), the plug column (242) is located at the lower side of the rotating column (241), the plug column (242) is adjacent to the main pipe positioning block (11), and the plug column (242) is rotationally connected to the rotating column (241); The airtight detection module comprises an air pump, a first plug driver, a second plug driver, an inflation plug (41) and a sealing head (42); the inflation plug (41) and the sealing head (42) are respectively arranged on both sides of the main pipe positioning block (11); the first plug driver and the second plug driver are both arranged on the frame; the first plug driver is drivingly connected to the inflation plug (41); the second plug driver is drivingly connected to the sealing head (42); the air pump is arranged on the frame; the inflation plug (41) is provided with an inflation channel; and the air outlet end of the air pump is connected to the inflation channel.

2. The integrated water separator welding airtight device according to claim 1, characterized in that: The first clamping arm (341) includes a first clamping portion (3411), the first clamping portion (3411) is formed on the clamping side, and the first clamping portion (3411) is in a "V" shape. The second clamping arm (342) includes a second clamping portion (3421), the second clamping portion (3421) is formed on the clamping side, and the second clamping portion (3421) is in a "V" shape. The first clamping portion (3411) and the second clamping portion (3421) are arranged opposite to each other, and the rotating column (241) is cylindrical.

3. The integrated gas-tight device for welding a water separator according to claim 1, characterized in that: A height positioning groove (2411) is formed on the rotating column (241).

4. The integrated water separator welding airtight device according to claim 3, characterized in that: The cross section of the height positioning groove (2411) is "V"-shaped, and the top edge and the bottom edge on the side opposite to the first clamp arm (341) and the second clamp arm (342) respectively have a first chamfer and a second chamfer, and the top edge and the bottom edge on the side opposite to the first clamp arm (342) and the first clamp arm (341) respectively have a third chamfer and a fourth chamfer.

5. The integrated gas-tight device for welding a water separator according to claim 1, characterized in that: A first arm groove (3311) is provided on the side surface of the first clamping plate (331) opposite to the second clamping plate (332).

6. The integrated water separator welding airtight device according to claim 5, characterized in that: A friction pad (35) is formed on the bottom surface of the first arm groove (3311).

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