Welding tool platform

Abstract

The welding tool platform comprises a supporting frame, and the supporting frame is provided with a rotary table capable of rotating, an air supply assembly and a water supply assembly; the rotary table is connected with a first driving device, and the first driving device is used for driving the rotary table to rotate; the rotary table is provided with a plurality of positioning seats used for installing copper pipes to be welded, each positioning seat is provided with a first vent hole, the air supply assembly is communicated with the first vent holes, and the first vent holes are communicated with inner cavities of the copper pipes arranged on the corresponding positioning seats. The water supply assembly is used for spraying water to cool the welded copper pipe; the gas supply assembly provides nitrogen for an inner cavity of the copper pipe so that welding operation of the copper pipe can be conveniently conducted, after welding operation is completed, the first driving device drives the rotary table to rotate, and the water supply assembly is arranged on the next station in the rotating direction of the rotary table and used for spraying water to cool the welded copper pipe. Therefore, the welding work efficiency of the copper pipe is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding, and particularly relates to a welding tooling platform. Background Art

[0002] In the prior art, brazing of copper pipes is a manual welding method, with combustion gases being oxygen and acetylene, and the shielding gas being nitrogen. During welding, first place the copper pipe and fittings on the welding platform, pass nitrogen through the inside of the copper pipe, then use a welding torch for welding. After welding is completed, put the copper pipe into water for cooling, and finally take out the copper pipe and place it on the rack. On the existing welding stations, only one copper pipe can be placed, and when taking the pipe for cooling, manual switching of nitrogen is required, resulting in low welding efficiency.

[0003] In view of this, the present invention is specifically proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a welding tooling platform.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is: a welding tooling platform, including a support frame, the support frame is provided with a rotatable turntable, a gas supply assembly, and a water supply assembly;

[0006] The turntable is connected to a first driving device, and the first driving device is used to drive the turntable to perform rotational movement;

[0007] The turntable is provided with a plurality of positioning seats for installing the copper pipes to be welded, each positioning seat is provided with a first ventilation hole, the gas supply assembly is in communication with the first ventilation hole, and the first ventilation hole is in communication with the inner cavity of the copper pipe provided in the corresponding positioning seat;

[0008] The water supply assembly is used to spray water to cool the copper pipe after welding is completed.

[0009] Through the above solution, the staff can install a plurality of copper pipes on the plurality of positioning seats on the turntable at the same time. After the staff completes the welding operation on one copper pipe, the first driving device is used to rotate the turntable to rotate the welded copper pipe to the position corresponding to the water supply assembly, and the water supply assembly is used to cool the copper pipe. During this process, the staff can continuously perform the welding operation on the copper pipe on the next positioning seat, thereby achieving the purpose of improving work efficiency.

[0010] Further, the gas supply assembly and the water supply assembly are arranged in sequence along the rotation direction of the turntable;

[0011] The gas supply assembly and the water supply assembly are respectively arranged corresponding to two different positioning seats, and the two positioning seats are arranged adjacent to each other;

[0012] Or at least one of the positioning seats is provided at intervals between the two positioning seats.

[0013] Through the above solution, the air supply assembly and the water supply assembly are arranged in sequence along the rotation direction of the turntable, so that during the process of the water supply assembly spraying water to cool the welded copper pipe, the air supply assembly can supply nitrogen to the inner cavity of the copper pipe to be welded, so that the copper pipe welding operation and the copper pipe cooling operation can be carried out simultaneously, thereby improving the working efficiency of the copper pipe welding process.

[0014] Further, the turntable is provided with a plurality of second ventilation holes, the plurality of second ventilation holes correspond to the plurality of first ventilation holes one by one, and the first ventilation holes are communicated with the air supply assembly through the second ventilation holes.

[0015] Through the above solution, by connecting the second ventilation holes and the first ventilation holes to each other, when the air supply conduit of the air supply assembly is inserted into the second ventilation holes, nitrogen supply to the inner cavity of the copper pipe is realized.

[0016] Further, the air supply assembly includes an air supply conduit, and the air supply conduit is communicated with the first ventilation holes through the second ventilation holes;

[0017] The air supply conduit is connected to a second driving device, and the second driving device is used to control the air supply conduit to reciprocate along the opening direction of the second ventilation holes.

[0018] Through the above solution, as the copper pipe welding operation continues, the turntable rotates with the first driving device. In order to avoid setting too many air supply conduits, resulting in individual control of multiple air supply conduits and prone to problems of chaotic nitrogen supply, an air supply conduit is arranged on the tooling platform, and the air supply conduit is reciprocated along the longitudinal direction through the second driving device. When the turntable needs to rotate, the second driving device can pull out the air supply conduit from the second ventilation holes. After the turntable rotates, the next positioning hole can rotate to the position corresponding to the air supply conduit. At this time, the second driving device drives the air supply conduit to move upward to realize nitrogen supply to the inner cavity of the copper pipe to be welded.

[0019] Further, the air supply conduit is provided with a switch assembly, and the switch assembly is used to control the connection state of the air supply conduit.

[0020] Through the above solution, since the air supply conduit needs to be connected to and detached from the plurality of second ventilation holes of the turntable one by one, in order to reduce waste of nitrogen, a switch assembly is arranged on the air supply conduit, and relevant opening or closing operations are carried out manually or through a program to ensure sufficient nitrogen supply to the copper pipe to be welded, while effectively avoiding waste.

[0021] Further, the water supply assembly includes a water supply conduit, and the water outlet of the water supply conduit faces the positioning seat;

[0022] The water inlet of the water supply conduit is connected to a water tank provided on the support frame, and a water pump is provided between the water supply conduit and the water tank. The water pump is used to pump the water in the water tank to the water supply conduit.

[0023] Through the above solution, in order to quickly cool the welded copper pipe, the water supply assembly is connected to the water tank, and the water pump of the water supply assembly pumps the water in the water tank to the water supply conduit to perform the cooling operation on the copper pipe.

[0024] Further, when the water pump is connected to at least two water supply conduits, the water outlets of the two water supply conduits respectively correspond to two adjacent positioning seats.

[0025] Through the above solution, when the welding process of the copper pipe takes a short time, the cooling effect of the water supply assembly on the copper pipe may not meet the corresponding cooling requirements within the same time. To avoid the above situation, two or more water supply conduits can be connected to the water pump, so that multiple water supply conduits can spray water to cool the copper pipes on multiple positioning seats at the same time, thereby increasing the cooling duration of the copper pipes and ensuring the cooling effect on the copper pipes.

[0026] Further, a water receiving trough is provided below the turntable, and a plurality of drain holes are evenly distributed on the turntable. The water sprayed by the water supply assembly flows into the water receiving trough through the plurality of drain holes.

[0027] Through the above solution, in order to prevent the water flow sprayed by the water spraying assembly from flowing randomly on the turntable and affecting the welding operation of the copper pipe, a plurality of drain holes are provided on the turntable, and a water receiving trough is provided below the turntable, so that the water flow sprayed by the water spraying assembly flows into the water receiving trough through the drain holes after completing the cooling operation on the copper pipe.

[0028] Further, the plurality of drain holes are divided into multiple groups of drain hole groups, and each drain hole group is arranged around the positioning seat.

[0029] Through the above solution, in order to minimize the water flow remaining on the turntable sprayed by the water supply assembly, the plurality of drain holes are divided into multiple groups of drain hole groups, and each drain hole group is arranged around the positioning seat, so that most of the water flow sprayed by the water supply assembly can flow into the water receiving trough through the drain holes in the first time, thereby effectively reducing the water flow remaining on the turntable.

[0030] Further, the positioning seat includes a plug-in part, and the plug-in part is used to install the copper pipe to be welded;

[0031] The first ventilation hole penetrates through the positioning seat and the plug-in part.

[0032] Through the above solution, the copper tube is arranged on the socket of the positioning seat, so that the copper tube can maintain a stable installation state on the positioning seat. During the rotation of the turntable and the copper tube welding operation, the copper tube can maintain a stable installation state, which helps to improve the welding efficiency of the copper tube.

[0033] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0034] By arranging a rotatable turntable, a gas supply component and a water supply component on the support frame, during the copper tube welding process by the staff, the gas supply component can supply nitrogen to the inner cavity of the copper tube to facilitate the smooth copper tube welding operation. After the welding operation is completed, the first driving device drives the turntable to rotate. There is a water supply component on the next station along the rotation direction of the turntable. The water supply component is used to spray water on the welded copper tube for cooling, so as to improve the welding work efficiency of the copper tube.

[0035] The gas supply component includes a gas supply conduit, on which a switch component and a second driving device are arranged. The second driving device is used to control the reciprocating movement of the gas supply conduit, so that the gas supply conduit can be inserted into the second ventilation hole of the turntable or pulled out from the second ventilation hole; the switch component is used to control the on-off state of the gas supply conduit, thereby avoiding nitrogen waste.

[0036] The gas supply component and the water supply component are respectively arranged corresponding to different positioning seats. The two positioning seats corresponding to the gas supply component and the water supply component can be arranged adjacent to each other, or at least one positioning seat is arranged at an interval between the two positioning seats, so as to avoid the water flow sprayed by the water supply component from splashing to the position of the gas supply component and affecting the welding process.

[0037] A water receiving tank is arranged below the turntable. Around each positioning seat on the turntable, a drainage hole group is arranged. The drainage hole group diverts the water flow sprayed by the water supply component into the water receiving tank, and connects the water receiving tank with the water tank, so that the water in the water tank can be recycled.

[0038] The following further describes in detail the specific embodiments of the present invention with reference to the drawings. Description of the Drawings

[0039] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0040] Figure 1It is a schematic structural diagram of the welding tooling platform in the present invention;

[0041] Figure 2 is the present invention Figure 1 schematic structural diagram of the transfer table;

[0042] Figure 3 is the present invention Figure 2 Another perspective schematic diagram of the transfer table.

[0043] In the figure: 1, support frame; 2, turntable; 201, positioning seat; 202, plug-in part; 203, first ventilation hole; 204, second ventilation hole; 205, drain hole; 206, first driving device; 3, water receiving tank; 4, water tank; 5, water supply assembly; 501, water supply conduit; 502, water pump; 6, air supply assembly; 601, water supply conduit; 602, switch assembly; 603, second driving device.

[0044] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation to the present invention.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] As Figures 1 to 3 shown, a welding tooling platform of the present invention includes a support frame 1, and the support frame 1 is provided with a rotatable turntable 2, an air supply assembly 6, and a water supply assembly 5;

[0049] The turntable 2 is connected to the first driving device 206, and the first driving device 206 is used to drive the turntable 2 to perform rotational motion;

[0050] The turntable 2 is provided with a plurality of positioning seats 201 for installing copper tubes. Each positioning seat 201 is provided with a first ventilation hole 203. The air supply assembly 6 is in communication with the first ventilation hole 203, and the first ventilation hole 203 is in communication with the inner cavity of the copper tube provided in the corresponding positioning seat 201;

[0051] The water supply assembly 5 is used to spray water to cool the copper tube after welding.

[0052] In the embodiment of the present application, a turntable 2, an air supply assembly 6 and a water supply assembly 5 are provided on the support frame 1 to implement the copper tube welding and cooling operations on the turntable 2. Specifically, the turntable 2 can perform rotational motion through the first driving device 206. The turntable 2 can adopt a circular structural platform, and a plurality of positioning seats 201 for installing copper tubes are arranged evenly around the edge of the circular turntable 2;

[0053] At the same time, the air supply assembly 6 and the water supply assembly 5 are respectively arranged at positions corresponding to different positioning seats 201; among them, the air supply assembly 6 and the water supply assembly 5 are arranged in sequence along the rotation direction of the turntable 2, and the air supply assembly 6 and the water supply assembly 5 can be respectively arranged corresponding to different positioning seats 201. The above different positioning seats 201 can be adjacent positioning seats 201, or two positioning seats 201 corresponding to at least one positioning seat 201 spaced apart.

[0054] Through the above settings, the welding worker can install a plurality of copper tubes and pipe fittings to be welded on the positioning seats 201 in the preparation stage and start the welding operation one by one. After the welding is completed, the first driving device 206 drives the turntable 2 to start rotational motion. When the welded copper tube rotates to the position corresponding to the water supply assembly 5, the water supply assembly 5 sprays water to cool the copper tube, so as to ensure the smooth progress of the entire welding operation, avoid the redundant operation of the welding worker repeatedly installing the copper tube, and the water supply assembly 5 can continuously spray water to cool the welded copper tube, thereby effectively improving the working efficiency of copper tube welding.

[0055] Optionally, a plurality of second ventilation holes 204 are provided on the turntable 2, and the plurality of second ventilation holes 204 correspond to the plurality of first ventilation holes 203 one by one;

[0056] The positioning seat 201 includes a cushion block provided on the upper end surface of the turntable 2. The first ventilation hole 203 can penetrate through the cushion block and is in communication with the second ventilation hole 204;

[0057] The air supply assembly 6 includes an air supply conduit 601 disposed below the air supply assembly 6. The air supply conduit 601 can be inserted into the second ventilation hole 204 and communicated with the inner cavity of the copper tube through the first ventilation hole 203. The air supply assembly 6 further includes a second driving device 603 connected to the air supply conduit 601. The second driving device 603 is used to drive the air supply conduit 601 to reciprocate in the longitudinal direction.

[0058] Further, a switch assembly 602 for controlling the on / off state of the air supply conduit 601 can be provided on the air supply conduit 601. The switch assembly 602 can be a solenoid valve. When the air supply conduit 601 is inserted into the second conduit. Specifically, before the staff starts the welding process, the second driving device 603 drives the air supply conduit 601 to move upward and insert it into the corresponding second ventilation hole 204, and controls the solenoid valve to open the air supply conduit 601 to fill the inner cavity of the copper tube to be welded with nitrogen. After the welding operation is completed, the solenoid valve is closed to stop the air supply conduit 601 from filling nitrogen into the copper tube. At the same time, the second driving unit pulls out the air supply conduit 601 from the second ventilation hole 204, and then the first driving device 206 drives the turntable 2 to start rotating, so that the first ventilation hole 203 of the next positioning seat 201 corresponds to the air supply conduit 601, and the above operation is repeated. In addition, the welded copper tube rotates with the turntable 2. When it rotates to the position corresponding to the water supply assembly 5, the water pump 502 pumps the water in the water tank 4 to the nozzle of the water supply conduit 501, and the welded copper tube is cooled by spraying water through the nozzle.

[0059] Further, the cushion block can be provided with a plug-in member 202 corresponding to the copper tube. The first ventilation hole 203 penetrates through the plug-in member 202 and is communicated with the inner cavity of the copper tube. During the process of the copper tube being disposed on the positioning seat 201, the staff can insert the copper tube and the pipe fitting on the plug-in member 202, so that the staff can directly weld the copper tube, and at the same time, during the process of rotating the turntable 2, the copper tube can still maintain a stable installation state.

[0060] Specifically, the plug-in member 202 can be a circular boss, and the diameter of the circular boss matches the inner diameter of the copper tube, so as to ensure a stable installation state when the copper tube is inserted into the circular boss. It should be noted that the specific shape of the plug-in member 202 is not specifically limited here, and the plug-in member 202 can adopt other shapes adapted to different workpieces to be welded.

[0061] Optionally, a water receiving tank 3 is provided below the turntable 2, and a plurality of drain holes 205 are evenly distributed on the turntable 2. The water sprayed by the water supply assembly 5 flows into the water receiving tank 3 through the plurality of drain holes 205. Further, in order to prevent the water sprayed by the water supply assembly 5 from flowing randomly on the turntable 2, which may affect the welding operation, or the water flowing randomly during the rotation of the turntable 2, the plurality of drain holes 205 are divided into multiple groups, and the plurality of drain holes 205 in each group are arranged around the positioning seat 201. When the water flow sprayed by the water supply assembly 5 reaches the turntable 2 after cooling the copper pipe, the water flow can flow into the water receiving tank 3 through the plurality of drain holes 205 around the positioning seat 201, avoiding the random flow of water above the turntable 2.

[0062] Further, the water receiving tank 3 may be provided with a through hole, and the drive shaft of the first drive device 206 can be connected to the turntable 2 through the through hole, avoiding interference between the water receiving tank 3 and the connection between the first drive device 206 and the turntable 2.

[0063] Optionally, in order to prevent the water flow sprayed by the water supply assembly 5 from affecting the welding operation, the gas supply assembly 6 and the water supply assembly 5 are arranged corresponding to different positioning seats 201, and at least one positioning seat 201 is spaced between the two positioning seats 201 corresponding to the gas supply assembly 6 and the water supply assembly 5 respectively. Thus, the distance between the gas supply assembly 6 and the water supply assembly 5 can be increased, effectively avoiding the water flow sprayed during the water spraying and cooling process of the water supply assembly 5 from affecting the welding operation.

[0064] Further, the water supply assembly 5 may be provided with two or more water supply conduits 501, and each water supply conduit 501 can correspond to two or more adjacent positioning seats 201 in sequence. When the welding time required is short, the plurality of water supply conduits 501 can perform the water spraying and cooling operation simultaneously; that is, when the turntable 2 is rotated after welding, the water supply conduit 501 on the side close to the gas supply assembly 6 fails to fully cool the copper pipe, and the next water supply conduit 501 can perform secondary cooling on the copper pipe that has not been fully cooled.

[0065] Further, the water receiving tank 3 can be connected to the water tank 4. By connecting the water receiving tank 3 to the water tank 4, the water in the water receiving tank 3 can flow back into the water tank 4 again, forming a circulating water path, effectively avoiding the overflow of water in the water receiving tank 3 while also enabling the reuse of water resources.

[0066] In the embodiments of the present application, the welding and cooling operations between the copper pipe and the pipe fitting are completed by a turntable 2, a gas supply assembly 6, and a water supply assembly 5 provided on a support frame 1. Specifically, the staff pre-insert multiple copper pipes and pipe fittings one by one onto the connectors 202 of the positioning seat 201. After the installation of the copper pipes and pipe fittings is completed, the second driving device 603 drives the gas supply conduit 601 to insert into the second ventilation hole 204 of the turntable 2, and the solenoid valve is opened to fill nitrogen into the inner cavity of the copper pipe. Subsequently, the staff performs the welding operation between the copper pipe and the pipe fitting. When the staff completes the welding operation, the solenoid valve closes the gas supply conduit 601 to stop filling nitrogen into the copper pipe, and the second driving device 603 controls the gas supply conduit 601 to be pulled out from the second ventilation hole 204. Subsequently, the first driving device 206 drives the turntable 2 to start rotating, and rotates the welded copper pipe to the position corresponding to the water supply assembly 5. At this time, the second driving device 603 and the solenoid valve can repeat the above operations to facilitate the staff to continue welding another copper pipe, and at the same time, the water supply assembly 5 can spray water to cool the welded copper pipe. In the above operations, according to the welding operation duration of the staff and the cooling effect of the water supply assembly 5 on the copper pipe during the corresponding duration, a solution of arranging multiple water supply pipes in the water supply assembly 5 can be adopted to ensure the cooling effect of the water supply assembly 5 on the copper pipe.

[0067] The above are only the preferred embodiments of the present invention, and there is no restriction on the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content as equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A welding tooling platform, characterized in that: It includes a support frame (1), and the support frame (1) is provided with a turntable (2) capable of rotational movement, a gas supply assembly (6) and a water supply assembly (5); The turntable (2) is connected to a first driving device (206), and the first driving device (206) is used to drive the turntable (2) to perform rotational movement; The turntable (2) is provided with a plurality of positioning seats (201) for installing the copper pipes to be welded. Each positioning seat (201) is provided with a first ventilation hole (203). The gas supply assembly (6) is in communication with the first ventilation hole (203), and the gas supply assembly (6) is in communication with the inner cavity of the copper pipe provided in the corresponding positioning seat (201) through the first ventilation hole (203); The water supply assembly (5) is used to spray water to cool the welded copper pipes.

2. The welding tooling platform according to claim 1, characterized in that: The gas supply assembly (6) and the water supply assembly (5) are arranged in sequence along the rotation direction of the turntable (2); The gas supply assembly (6) and the water supply assembly (5) are respectively arranged corresponding to two different positioning seats (201), and the two positioning seats (201) are adjacent to each other; Or at least one positioning seat (201) is provided at an interval between the two positioning seats (201).

3. The welding tooling platform according to claim 2, wherein: The turntable (2) is provided with a plurality of second ventilation holes (204), and the plurality of second ventilation holes (204) correspond to the plurality of first ventilation holes (203) one by one. The first ventilation hole (203) is in communication with the gas supply assembly (6) through the second ventilation hole (204).

4. The welding tooling platform according to claim 3, wherein: The gas supply assembly (6) includes a gas supply conduit (601), and the gas supply conduit (601) is in communication with the first ventilation hole (203) through the second ventilation hole (204); The gas supply conduit (601) is connected to a second driving device (603), and the second driving device (603) is used to control the reciprocating movement of the gas supply conduit (601) along the opening direction of the second ventilation hole (204).

5. The welding tooling platform according to claim 4, wherein: The gas supply conduit (601) is provided with a switch assembly (602), and the switch assembly (602) is used to control the communication state of the gas supply conduit (601).

6. The welding tooling platform according to claim 2, wherein: The water supply assembly (5) includes a water supply conduit (501), and the water outlet of the water supply conduit (501) is arranged towards the positioning seat (201); The water inlet of the water supply conduit (501) is connected to a water tank (4) provided on the support frame (1). A water pump (502) is provided between the water supply conduit (501) and the water tank (4), and the water pump (502) is used to pump the water in the water tank (4) to the water supply conduit (501).

7. The welding tooling platform according to claim 6, characterized in that: When the water pump (502) is connected to at least two water supply conduits (501), the water outlets of the two water supply conduits (501) respectively correspond to two adjacent positioning seats (201).

8. The welding tooling platform according to any one of claims 1-7, characterized in that: A water receiving tank (3) is provided below the turntable (2), and a plurality of drain holes (205) are evenly distributed on the turntable (2). The water sprayed by the water supply assembly (5) flows to the water receiving tank (3) through the plurality of drain holes (205).

9. The welding tooling platform according to claim 8, characterized in that: The multiple drain holes (205) are divided into multiple groups of drain hole groups, and each of the drain hole groups is arranged around the positioning seat (201).

10. The welding tooling platform according to any one of claims 1-7, characterized in that: The positioning seat (201) includes a plug-in part (202), and the plug-in part (202) is used for installing the copper pipe to be welded; The first ventilation hole (203) is arranged through the positioning seat (201) and the plug-in part (202).

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