Flame welding mechanism for copper pipe

Abstract

The invention relates to the technical field of copper pipe welding, in particular to a flame welding mechanism for a copper pipe. And the horizontal telescopic rod drives the flame spray head to move to the to-be-welded part located at the welding position, so that flames sprayed out of the flame spray head heat the to-be-welded point of the to-be-welded part, the welding flux at the to-be-welded point is molten, the welding flux is molten and enters the welding gap, and then welding of the to-be-welded part is completed. In the whole welding process, workers are far away from the welding position, and then the risk of hurting the workers in the welding process can be effectively reduced. And meanwhile, the horizontal reciprocating motion of the horizontal telescopic rod can enable a to-be-welded point of the to-be-welded part to be uniformly heated, so that the welding flux is fully melted. And under the action of the vertical reciprocating motion of the vertical telescopic rod, the whole welding seam can be completely heated, and then the welding flux flows to the whole welding seam from top to bottom, so that the compactness degree of the welding seam after the welding flux is solidified is improved, and the sealing performance of the welding seam is improved.

Description

Technical Field

[0001] The invention relates to the technical field of copper pipe welding, in particular to a copper pipe flame welding mechanism. Background Art

[0002] Copper tubes are important components of air conditioners, and they connect various parts to conduct air flow. Copper tubes have different shapes due to their different locations. The most commonly used are straight tubes without branches. However, this straight tube is mainly used for external connections of air conditioners; and because the space inside the air conditioner is relatively small, the copper tubes are usually designed to be more complicated, and are often irregular tree branches.

[0003] The dendrite-shaped copper pipe is mainly composed of a main pipe and a branch pipe welded to the main pipe. In the process of branch pipe welding, the main pipe is usually fixed, and then the branch pipe is inserted into the positioning hole on the main pipe, and then welded by manually holding a flame nozzle. Although this method can weld the branch pipe to the main pipe, the welding efficiency is low during the welding process due to manual operation; and since flame is used in welding, there is also a potential risk of injury to the staff. It can be seen that a welding mechanism is needed to replace manual operation. Summary of the invention

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a copper tube flame welding mechanism. The present invention uses a welding mechanism to replace manual operation, which can improve welding efficiency and reduce harm to workers.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A copper tube flame welding mechanism comprises a turntable for fixing parts to be welded, the turntable can perform a rotational motion to sequentially deliver the parts to be welded into a welding position; a flame nozzle for welding the parts to be welded in the welding position is arranged on the side of the turntable, the flame nozzle is mounted on the telescopic end of a horizontal telescopic rod, and the horizontal telescopic rod can perform a horizontal reciprocating motion to push the flame nozzle toward or pull it out of the welding position; the fixed end of the horizontal telescopic rod is mounted on the telescopic end of a vertical telescopic rod, and the vertical telescopic rod can perform a vertical reciprocating motion to make the flame nozzle move vertically up and down in the welding position.

[0007] As a further solution of the present invention: the fixed end of the horizontal telescopic rod is installed on the support plate, and the telescopic direction of the horizontal telescopic rod is arranged horizontally; a cross bar is horizontally arranged on the telescopic end of the horizontal telescopic rod, a swing rod is hinged at the front end of the cross bar, and a flame nozzle is fixedly installed at the front end of the swing rod; the hinge axis of the swing rod and the cross bar is arranged horizontally and perpendicular to the length direction of the cross bar, and a driving swing member is also installed on the cross bar, which can make the swing rod swing back and forth around the hinge axis within a set angle range to avoid each other with the workpiece to be welded.

[0008] As a further solution of the present invention: the driving swing member includes a driving rod hinged on the cross bar, the intersection axis of the driving rod and the cross bar and the hinge axis of the swing rod and the cross bar are parallel to each other; the middle part of the driving rod is hinged to the cross bar so that both ends of the driving rod constitute cantilever ends, and elastic parts are elastically connected between the two cantilever ends and the cantilever ends of the swing rod; a plurality of swinging teeth are arranged in sequence on the horizontal moving path of the driving rod, which can collide with the top end of the driving rod in sequence to make the driving rod swing back and forth; the two elastic parts can make the swing rod fixedly installed with the flame nozzle in a horizontal state when the driving rod and any swinging teeth are in a static state of abutting each other; baffles for limiting the set angle range are also arranged on the upper and lower sides of the swing rod.

[0009] As a further solution of the present invention: a transverse plate is fixedly mounted on the support plate, the transverse plate is located above the transverse rod, and each swinging tooth is sequentially mounted on the lower plate surface of the transverse plate.

[0010] As a further solution of the present invention: the tail end of the baffle rod is fixed on the cross bar, and the front end of the baffle rod extends to the upper side or the lower side of the swing rod.

[0011] As a further solution of the present invention: a guide sleeve is fixedly mounted on the support plate, and the tail end of the cross bar is coaxially slidably fitted in the sleeve cavity of the guide sleeve.

[0012] As a further solution of the present invention: the elastic member is a return spring, and the elastic coefficient of the return spring on the upper side of the cross bar is greater than the elastic coefficient of the return spring on the lower side of the cross plate.

[0013] As a further solution of the present invention: a mounting seat is fixedly installed at the front end of the swing arm, and a plurality of gas pipes are installed on the mounting seat, each of which extends downward, and a flame nozzle is installed at the end of the gas pipe, and the flame nozzles are arranged in a circular direction in sequence, and the flame nozzles cooperate to form a welding space for heating and welding the workpiece to be welded, and each flame nozzle is connected to an openable and closable gas storage tank that provides fuel gas.

[0014] As a further solution of the present invention: a clamping sleeve is fixedly installed on the turntable, and the fixed end to be welded is coaxially inserted in the clamping sleeve; each clamping sleeve is evenly arranged on the turntable in sequence around the circumference of the turntable; the axial direction of the turntable is arranged vertically; the turntable is coaxially fixed on the motor shaft of the driving motor.

[0015] As a further solution of the present invention: the fixed end of the vertical telescopic rod is fixedly installed on a support frame, and the support frame is supported and arranged on the ground.

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

[0017] 1. The horizontal telescopic rod drives the flame nozzle to move to the workpiece to be welded at the welding position, so that the flame sprayed by the flame nozzle heats the welding point of the workpiece to be welded to melt the solder at the welding point, thereby melting the solder and entering the welding gap to complete the welding of the workpiece to be welded. During the entire welding process, the workers stay away from the welding point, which can effectively reduce the risk of harming the workers during the welding process. At the same time, the horizontal reciprocating motion of the horizontal telescopic rod can make the welding point of the workpiece to be welded evenly heated, so that the solder can be fully melted. And under the action of the vertical reciprocating movement of the vertical telescopic rod, the entire weld can be heated, so that the solder flows from top to bottom throughout the weld, thereby improving the density of the weld after the solder solidifies, and improving the sealing performance of the weld.

[0018] 2. During the movement of the crossbar, the driving rod continuously collides with the swinging teeth, causing the driving rod to continuously shake, thereby driving the swing rod to continuously swing up and down, thereby fully heating the welding point.

[0019] 3. When welding is not in progress, the top of the driving rod is clamped between two adjacent swing teeth. Under the action of the two elastic members, the swing rod is in a stationary state, and under the adjustment of the horizontal telescopic rod, the swing rod can be in a horizontal state. During the welding process, when the driving rod contacts the swing tooth, the driving rod will rotate in the opposite direction, and the swing rod will be pulled up by the elastic member; when it passes the current swing tooth, the swing rod falls under the action of gravity; when the driving rod contacts the next swing tooth, the swing rod is pulled up again, so that the swing rod swings repeatedly, and then the welding point is evenly and fully heated, so that the solder is completely melted and fully flows into the weld, thereby improving the sealing of the welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the swinging member in the present invention.

[0022] Figure 3 It is a top view of the support plate in the present invention.

[0023] In the figure: 1. base; 11. drive motor; 12. turntable; 121. clamping sleeve; 2. support frame; 21. vertical telescopic rod; 22. support plate; 3. horizontal telescopic rod; 31. cross bar; 32. guide sleeve; 33. swing member; 331. drive rod; 332. elastic member; 333. stop rod; 34. swing rod; 35. mounting seat; 351. flame nozzle; 36. cross plate; 361. swing tooth; 4. gas storage tank; 5. parts to be welded; 51. main pipe; 52. branch pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 to Figure 3 In an embodiment of the present invention, a copper tube flame welding mechanism includes a base 1 supported on the ground. A driving motor 11 is fixedly mounted on the base 1, and the axial direction of the driving motor 11 is arranged vertically. A turntable 12 is coaxially fixed to the top of the motor shaft of the driving motor 11, and the upper disk surface of the turntable 12 is a horizontal plane. A clamping sleeve 121 is fixedly mounted on the upper disk surface of the turntable 12, and the axial directions of each clamping sleeve 121 are arranged vertically. Each clamping sleeve 121 is uniformly arranged in sequence around the circumference of the turntable 12. An exhaust pipe is connected to the bottom of the sleeve cavity of each clamping sleeve 121, and the exhaust pipe is connected to an exhaust pump. When welding is performed, exhaust is performed to collect toxic gases generated during the welding process. The exhaust pump is fixed on the upper disk surface of the turntable 12, and the air bag containing toxic gas is removed regularly and replaced with a clean air bag to continuously extract the toxic gas.

[0026] The workpiece 5 to be welded includes a closed cylindrical copper main pipe 51 and a U-shaped copper branch pipe 52. One end of the branch pipe 52 is sleeved at the top of the main pipe 51. Then the main pipe 51 of the entire workpiece 5 to be welded is coaxially inserted into the sleeve cavity of the clamping sleeve 121 manually, and then some solder is placed at the sleeve joint of the main pipe 51 and the branch pipe 52. The manual loading position and the welding position are arranged relative to each other so that the workers can avoid the flame spray head 351 as much as possible, thereby improving the safety of the workers. In addition, some cooling water nozzles are arranged on the side of the turntable 12 to cool the workpiece after welding.

[0027] A support frame 2 is also arranged beside the base 1. A vertical telescopic motor as a vertical telescopic rod 21 is fixedly welded on the support frame 2. The axis of the vertical telescopic motor is arranged vertically, and a support plate 22 is fixedly installed on the top of the vertical telescopic motor. In order to improve the support strength of the support plate 22, an inner sleeve rod with an axis arranged vertically is arranged at the bottom of the support plate 22, and an outer sleeve rod is arranged on the support frame 2. The inner sleeve rod is coaxially sleeved inside the outer sleeve rod, thereby improving the stability of the vertical up and down movement of the support plate 22 when the vertical telescopic motor is working.

[0028] A horizontal telescopic motor as a horizontal telescopic rod 3 is installed on the upper plate surface of the support plate 22. A crossbar 31 is installed at the front end of the horizontal telescopic motor, and the rod length direction is parallel to the telescopic direction of the horizontal telescopic motor. A guide sleeve 32 is also installed on the support plate 22, and the crossbar 31 is coaxially slidably inserted into the sleeve hole of the guide sleeve 32. The swing member 33 includes a swing rod 34 connected to the front end of the crossbar 31, and the hinge axis of the crossbar 31 and the swing rod 34 is arranged horizontally and perpendicular to the rod length direction of the crossbar 31. A through hole connected up and down is started in the middle of the crossbar 31, and a driving rod 331 is inserted in the through hole, and the driving rod 331 is hinged in the through hole through a hinge shaft. The hinge axis at the driving rod 331 is arranged horizontally and perpendicular to the rod length direction of the crossbar 31. The upper and lower ends of the driving rod 331 are connected to the middle position of the swing rod 34 through a return spring as an elastic member 332.

[0029] A transverse plate 36 is fixedly mounted on the support plate 22 . The transverse plate 36 is located above the transverse rod 31 , and each swinging tooth 361 is sequentially mounted on the lower plate surface of the transverse plate 36 .

[0030] A plurality of swing teeth 361 are arranged in sequence on the horizontal moving path of the driving rod 331, which can collide with the top of the driving rod 331 in sequence to make the driving rod 331 swing back and forth; when the driving rod 331 and any swing tooth 361 are in a static state of abutting each other, the two elastic members 332 can make the swing rod 34 fixed with the flame spray head 351 in a horizontal state; and the upper and lower sides of the swing rod 34 are also arranged with stopper rods 333 for limiting the set angle range. The front end of the stopper rod 333 extends to the upper side or the lower side of the swing rod 34.

[0031] A mounting seat 35 is fixedly installed at the front end of the swing arm 34, and a plurality of gas pipes are installed on the mounting seat 35. Each gas pipe extends downward, and a flame nozzle 351 is installed at the end of the gas pipe. The flame nozzles 351 are arranged in a circular direction in sequence, and the flame nozzles 351 cooperate to form a welding space for heating and welding the workpiece 5 to be welded. Each flame nozzle 351 is connected to an openable and closable gas storage tank 4 that provides fuel gas.

[0032] When in use, first turn on the drive motor 11, and the drive motor 11 rotates intermittently. When the drive motor 11 stops, there will always be a workpiece 5 to be welded at the welding position for welding. During the operation of the turntable 12, the staff will continuously load the material and remove the welded workpiece. During the welding process, the vertical telescopic motor and the horizontal telescopic motor move synchronously to achieve comprehensive heating and welding of the top, bottom, left, right, front and back of the welding point. The horizontal telescopic motor extends so that the workpiece 5 to be welded passes through the channel between the adjacent flame nozzles 351 and enters the welding space. Then the horizontal telescopic motor starts to do reciprocating linear motion, so that each flame nozzle 351 heats and welds it on the surrounding side of the welding workpiece. At the same time, the vertical telescopic motor stretches up and down, so that each flame nozzle 351 heats and welds the upper and lower positions of the welding point. When no welding is performed, the top of the drive rod 331 is clamped between two adjacent swing teeth 361, and under the action of the two elastic members 332, the swing rod 34 is in a static state, and under the adjustment of the horizontal telescopic rod 3, the swing rod 34 can be in a horizontal state. During the welding process, when the driving rod 331 contacts the swinging tooth 361, the driving rod 331 will rotate in the opposite direction, and pull the swing rod 34 upward under the action of the elastic member 332; when passing over the current swinging tooth 361, the swing rod 34 falls under the action of gravity; when the driving rod 331 contacts the next swinging tooth 361, the swing rod 34 is pulled up again, so that the swing rod 34 swings repeatedly, and then the welding point is evenly and fully heated, so that the solder is completely melted and fully flows into the weld, so as to improve the sealing of the welding. During the up and down swinging of the swing rod 34, the limiting effect of the upper and lower stop rods 333 limits the swinging range of the swing rod 34, thereby avoiding collision with the workpiece 5 to be welded during the swinging process of the swing rod 34. When a workpiece is welded, the horizontal telescopic motor and the vertical telescopic motor are reset, the turntable 12 rotates, and the next workpiece 5 to be welded enters the welding position to complete the welding work.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A copper tube flame welding mechanism, characterized in that: The invention comprises a rotating disk (12) for fixing the parts to be welded (5), the rotating disk (12) being capable of rotating to sequentially deliver the parts to be welded (5) to the welding position; a flame spray head (351) for welding the parts to be welded (5) at the welding position is arranged on the side of the rotating disk (12), the flame spray head (351) being mounted on the telescopic end of a horizontal telescopic rod (3), and the horizontal telescopic rod (3) being capable of horizontal reciprocating motion to push the flame spray head (351) toward or pull it out of the welding position; the fixed end of the horizontal telescopic rod (3) being mounted on the telescopic end of a vertical telescopic rod (21), and the vertical telescopic rod (21) being capable of vertical reciprocating motion to enable the flame spray head (351) to vertically move up and down at the welding position.

2. A copper tube flame welding mechanism according to claim 1, characterized in that: The fixed end of the horizontal telescopic rod (3) is mounted on the support plate (22), and the telescopic direction of the horizontal telescopic rod (3) is arranged horizontally; a horizontal cross bar (31) is arranged horizontally on the telescopic end of the horizontal telescopic rod (3), a swing rod (34) is hinged at the front end of the cross bar (31), and a flame spray head (351) is fixedly mounted at the front end of the swing rod (34); the hinge axis of the swing rod (34) and the cross bar (31) is arranged horizontally and perpendicular to the length direction of the cross bar (31), and a driving swing member is also installed on the cross bar (31) to enable the swing rod (34) to swing back and forth around the hinge axis within a set angle range to avoid the welded part (5).

3. A copper tube flame welding mechanism according to claim 2, characterized in that: The swing driving member comprises a driving rod (331) hinged on the cross bar (31), the hinge axis of the driving rod (331) and the cross bar (31) and the hinge axis of the swing rod (34) and the cross bar (31) are parallel to each other; the middle part of the driving rod (331) is hinged to the cross bar (31), so that both ends of the driving rod (331) form cantilever ends, and elastic members (332) are elastically connected between the two cantilever ends and the cantilever end of the swing rod (34); a horizontal elastic member (332) located at the driving rod (331) A plurality of swing teeth (361) are arranged in sequence on the moving path and can collide with the top of the driving rod (331) in sequence to make the driving rod (331) swing back and forth; when the driving rod (331) and any swing tooth (361) are in a static state of abutting each other, the two elastic members (332) can make the swing rod (34) on which the flame spray head (351) is fixedly mounted be in a horizontal state; and blocking rods (333) for limiting the set angle range are also arranged on the upper and lower sides of the swing rod (34).

4. A copper tube flame welding mechanism according to claim 3, characterized in that: A transverse plate (36) is fixedly mounted on the support plate (22), the transverse plate (36) is located above the transverse rod (31), and each swinging tooth (361) is sequentially mounted on the lower plate surface of the transverse plate (36).

5. A copper tube flame welding mechanism according to claim 4, characterized in that: The rear end of the blocking rod (333) is fixed on the crossbar (31), and the front end of the blocking rod (333) extends to the upper side or the lower side of the swing rod (34).

6. A copper tube flame welding mechanism according to claim 5, characterized in that: A guide sleeve (32) is also fixedly mounted on the support plate (22), and the tail end of the crossbar (31) is coaxially slidably fitted in the sleeve cavity of the guide sleeve (32).

7. A copper tube flame welding mechanism according to claim 6, characterized in that: The elastic member (332) is a return spring, and the elastic coefficient of the return spring on the upper side of the cross bar (31) is greater than the elastic coefficient of the return spring on the lower side of the cross plate (36).

8. A copper tube flame welding mechanism according to any one of claims 2 to 7, characterized in that: A mounting seat (35) is fixedly mounted on the front end of the swing rod (34), and a plurality of gas guide pipes are mounted on the mounting seat (35), each of which extends downward, and a flame spray head (351) is mounted at the end of the gas guide pipe, and each of the flame spray heads (351) is arranged in a circular manner in sequence, and each of the flame spray heads (351) cooperates to form a welding space for heating and welding the workpiece (5) to be welded, and each of the flame spray heads (351) is connected to an openable and closable gas storage tank (4) for providing fuel gas.

9. A copper tube flame welding mechanism according to claim 8, characterized in that: A clamping sleeve (121) is fixedly installed on the turntable (12), and a fixed end to be welded is coaxially inserted into the clamping sleeve (121); each clamping sleeve (121) is uniformly arranged on the turntable (12) in sequence around the circumference of the turntable (12); the axial direction of the turntable (12) is arranged vertically; and the turntable (12) is coaxially fixed on the motor shaft of the driving motor (11).

10. A copper tube flame welding mechanism according to claim 9, characterized in that: The fixed end of the vertical telescopic rod (21) is fixedly mounted on a support frame (2), and the support frame (2) is supported and arranged on the ground.

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