A bondi tube feed back mechanism of a condenser tube welding machine

Abstract

This utility model relates to a Bundy tube feeding and return mechanism for a condenser tube welding machine. The features of this utility model are: it includes a horizontal feeding and return support frame, a vertical feeding and return support frame, a first Bundy tube carrier, a second Bundy tube carrier, a horizontal feeding and return structure, and a vertical feeding and return structure. The first Bundy tube carrier is equipped with a slide rail and two Bundy tube hangers. A push pin is located at one end of the first Bundy tube carrier. The structure of the second Bundy tube carrier is the same as that of the first Bundy tube carrier. The horizontal and vertical feeding and return support frames are fixed side-by-side. The horizontal feeding and return structure is fixed to the horizontal feeding and return support frame, and the vertical feeding and return structure is fixed to the vertical feeding and return support frame. Both the first and second Bundy tube carriers cooperate with the horizontal feeding and return structure, and the horizontal and vertical feeding and return structures cooperate with each other. This utility model has a reasonable structural design and high feeding and return efficiency.

Description

Technical Field

[0001] This utility model relates to a Bondi tube feeding and return mechanism for a condenser tube welding machine. It is used to feed the Bondi tubes containing steel wire to be welded to the welding mechanism of the condenser tube welding machine, and to retrieve the Bondi tubes after welding the steel wire from the welding mechanism. In other words, it is used for feeding and returning Bondi tubes during welding in the condenser tube welding machine, and is a component of the condenser tube welding machine. Background Technology

[0002] Condenser coils are widely used in refrigerators, air conditioners, and other equipment requiring condensation. Condenser coils are typically produced by bending Bondi tubing into the desired shape and then welding steel wire onto the Bondi tubing using a condenser coil welding machine. Currently, the design of the Bondi tubing feeding and return mechanism is not optimal, resulting in low feeding and return efficiency. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned deficiencies in the existing technology and to provide a Bundy tube feeding and return mechanism for a condenser tube welding machine with a reasonable structural design and high feeding and return efficiency.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: The structural features of the Bundy tube feeding and return mechanism of the condenser tube welding machine are as follows: it includes a horizontal feeding and return support frame, a vertical feeding and return support frame, a first Bundy tube carrier, a second Bundy tube carrier, a horizontal feeding and return structure, and a vertical feeding and return structure. The top of the first Bundy tube carrier is provided with a slide rail, and the bottom of the first Bundy tube carrier is provided with two Bundy tube hangers for hanging the Bundy tubes. A push pin is provided at one end of the first Bundy tube carrier. The structure of the second Bundy tube carrier is the same as that of the first Bundy tube carrier. The horizontal feeding and return support frame and the vertical feeding and return support frame are fixed side by side. The horizontal feeding and return structure is fixed on the horizontal feeding and return support frame, and the vertical feeding and return structure is fixed on the vertical feeding and return support frame. The first Bundy tube carrier and the second Bundy tube carrier both cooperate with the horizontal feeding and return structure. The horizontal feeding and return structure cooperate with the vertical feeding and return structure.

[0005] Preferably, the horizontal feeding and returning structure of this utility model includes a station switching cylinder, two suspension fixing components, a first lifting beam, a second lifting beam, a motor, a horizontal feeding and returning reducer, a driving roller, a driven roller, a horizontal synchronous belt, a cylinder fixing plate, a first pushing cylinder, a second pushing cylinder, a first pushing component, a second pushing component, a first lifting rail, and a second lifting rail. Each suspension fixing component includes a suspension fixing groove, a linear guide rail, and a linear bearing. The top of the suspension fixing groove is slidably connected to the top of the horizontal feeding and returning support frame, and the linear guide rail is fixed to the bottom of the suspension fixing groove. The two ends of the linear bearing are respectively fixed to the top of the first and second lifting beams. The first and second lifting beams are parallel and have a gap between them to accommodate the driving roller, driven roller, and horizontal synchronous belt. The linear guide rail is mounted on the linear bearing. The station switching cylinder is fixed to the top of the horizontal feeding and returning support frame. The piston rod of the station switching cylinder is horizontal and fixed to the top of the first lifting beam. The motor is fixed to one end of the second lifting beam. The horizontal feeding and returning reducer is connected to the motor. The driving roller and the horizontal feeding and returning support frame are connected. The return material reducer is connected, and the driven roller is installed at the other end of the second lifting beam. The driving roller and the driven roller are connected by a horizontal synchronous belt. The driving roller, the driven roller, and the horizontal synchronous belt are all located between the first and second lifting beams. The top of the cylinder fixing plate is fixed to the bottom surface of the horizontal synchronous belt. The first and second pushing cylinders are both fixed to the bottom of the cylinder fixing plate, and the piston rods of the first and second pushing cylinders are both vertically downward. The tops of the first and second pushing components are respectively connected to the first pushing cylinder. On the piston rod of the piston rod and the piston rod of the second pushing cylinder, the bottom of the first pushing component is provided with a first sleeve notch that mates with the pushing pin on the first Bundy tube carrier, and the bottom of the second pushing component is provided with a second sleeve notch that mates with the pushing pin on the second Bundy tube carrier; the first and second lifting rails are respectively fixed below the first and second lifting beams, the bottom of the first lifting rail is provided with a first material groove that mates with the slide rail on the first Bundy tube carrier, and the bottom of the second lifting rail is provided with a second material groove that mates with the slide rail on the second Bundy tube carrier.

[0006] Preferably, the vertical feeding and return structure of this utility model includes a carrier beam, a carrier positioning cylinder, a stepper motor, a vertical feeding and return reducer, a transmission rod, two upper rollers, two lower rollers, and two vertical synchronous belts. The stepper motor and the vertical feeding and return reducer are both fixed to the top of the vertical feeding and return support frame. The vertical feeding and return reducer is connected to the stepper motor, and the transmission rod is connected to the vertical feeding and return reducer. The two upper rollers are respectively fixed to both ends of the transmission rod, and the two lower rollers... Rollers are fixed on both sides of the vertical feeding and return support frame. An upper roller and a lower roller are grouped together and connected by a vertical synchronous belt. The two ends of the carrier beam are fixed on two vertical synchronous belts, and the carrier beam is horizontal. The bottom of the carrier beam is provided with a material trough that cooperates with the slide rails on the No. 1 and No. 2 Bundy tube carriers. The carrier positioning cylinder is installed on the carrier beam to position the slide rails located in the material trough.

[0007] Preferably, the side of the first hanging rail of this invention is fixed by at least two vertical plates and the side of the first hanging beam, and the first hanging rail is located directly below the first hanging beam. The side of the second hanging rail is fixed by at least two vertical plates and the side of the second hanging beam, and the second hanging rail is located directly below the second hanging beam. The first and second hanging rails are parallel, and the first material trough in the first hanging rail is parallel to the second material trough in the second hanging rail.

[0008] Preferably, the top of the vertical feeding and return support frame of this utility model is provided with two horizontal cantilever arms. The suspension fixing groove in one suspension fixing component is slidably connected to the bottom of one cantilever arm, and the suspension fixing groove in the other suspension fixing component is slidably connected to the bottom of the other cantilever arm.

[0009] Preferably, the transmission rod of this invention is connected to the vertical feeding and return support frame via two bearing seats.

[0010] Preferably, the workstation switching cylinder of this utility model is located between two suspension fixing components.

[0011] Preferably, both sides of the cylinder fixing plate of this utility model are slidably connected to the first and second lifting beams respectively through a sliding groove and sliding rail structure.

[0012] Preferably, the first Bondi tube support of this invention has a push pin at one end position, and the second Bondi tube support has a push pin at the other end position.

[0013] Compared with the prior art, this utility model has the following advantages and effects: It is used to feed the Bondi tube (for welding steel wire) to the welding mechanism of the condenser tube welding machine, and to retrieve the Bondi tube after welding. Specifically, it is used for feeding and retrieving the Bondi tube during welding in the condenser tube welding machine. Under the pushing and pulling action of the station switching cylinder, the No. 1 and No. 2 hanging rails work alternately. For example, the No. 1 pushing cylinder controls the No. 1 pushing component to send the No. 1 Bondi tube carrier, which is located on the No. 1 hanging rail and has the Bondi tube hanging on it, into the carrier beam of the vertical feeding and returning support frame. The stepper motor controls the carrier beam to rise step by step. The steel wire is welded to the Bondi tube by the welding mechanism of the condenser tube welding machine. Each time the carrier beam rises one step, the welding mechanism moves along the Bondi tube. A steel wire is welded to each corresponding position on both sides of the tube. At the same time, the worker can hang the next batch of Bondi tubes to be welded on the No. 2 Bondi tube support for backup. After the Bondi tubes hanging on the No. 1 Bondi tube support are welded and returned to the No. 1 material trough of the No. 1 hanging rail, the No. 2 push cylinder controls the No. 2 pusher to send the No. 2 Bondi tube support, which is located on the No. 2 hanging rail and has Bondi tubes hanging on it, into the carrier beam of the vertical feeding and returning support frame. The steel wires are welded to the Bondi tubes by the welding mechanism of the condenser tube welding machine. At the same time, the worker first removes the welded Bondi tubes from the No. 1 Bondi tube support, and then hangs the next batch of Bondi tubes to be welded on the No. 1 Bondi tube support for backup. This cycle is repeated, and the feeding and returning efficiency is high. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the drawings used in the description of the embodiments and / or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view structural schematic diagram of the Bundy tube feeding and return mechanism of the condenser tube welding machine in this embodiment of the utility model.

[0016] Figure 2 This is a left-side structural schematic diagram of the Bundy tube feeding and return mechanism of the condenser tube welding machine in this embodiment of the present invention.

[0017] Figure 3 This is a top view of the Bundy tube feeding and return mechanism of the condenser tube welding machine in this embodiment of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the Bundy tube feeding and return mechanism of the condenser tube welding machine in this embodiment of the present invention.

[0019] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0020] Figure 6 This is a three-dimensional structural schematic diagram of the Bundy tube feeding and return mechanism of the condenser tube welding machine in this embodiment of the present invention from another perspective.

[0021] Figure 7 yes Figure 6 A magnified structural diagram of section B.

[0022] Figure 8 yes Figure 6 A magnified structural diagram of point C.

[0023] Figure 9 yes Figure 6 A magnified structural diagram of point D in the middle.

[0024] Figure 10 This is an enlarged structural diagram of a Bundy tube after it has been welded with steel wire.

[0025] In the diagram: 1-Horizontal feeder support frame; 2-Vertical feeder support frame; 3-No. 1 Bundy tube support component; 4-Slide rail; 5-Bundy tube hanger; 6-Cantilever; 7-Horizontal feeder structure; 8-Vertical feeder structure; 71-Station switching cylinder; 72-Suspension fixing component; 73-No. 1 lifting beam; 74-No. 2 lifting beam; 75-Motor; 76-Horizontal feeder reducer; 77-Driving roller; 78-Driven roller; 79-Horizontal synchronous belt; 710-Cylinder fixing plate; 711-No. 1 pushing cylinder; 712-No. 2 pushing cylinder; 713-No. 1 pushing component; 714-Second Push Material Pusher; 715-First Hanging Rail; 716-Second Hanging Rail; 720-Suspension Fixing Groove; 721-Linear Guide Rail; 722-Linear Bearing; 723-First Socket Notch; 724-Second Socket Notch; 725-First Material Groove; 726-Second Material Groove; 727-Vertical Plate; 81-Carrier Beam; 82-Carrier Positioning Cylinder; 83-Stepper Motor; 84-Vertical Feed Return Reducer; 85-Transmission Rod; 86-Upper Roller; 87-Lower Roller; 88-Vertical Synchronous Belt; 89-Material Groove; 100-Steel Wire; 200-Bundy Tube. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0027] Example

[0028] See Figures 1 to 10In this embodiment, the Bundy tube feeding and return mechanism of the condenser tube welding machine includes a horizontal feeding and return support frame 1, a vertical feeding and return support frame 2, a first Bundy tube carrier 3, a second Bundy tube carrier, a horizontal feeding and return structure 7, and a vertical feeding and return structure 8. The top of the first Bundy tube carrier 3 is provided with a slide rail 4, and the bottom of the first Bundy tube carrier 3 is provided with two Bundy tube hangers 5 for hanging the Bundy tube 200. A push pin is provided at one end of the first Bundy tube carrier 3. The structure of the second Bundy tube carrier is the same as that of the first Bundy tube carrier 3, except that the push pin on the second Bundy tube carrier is located on the other side of the second Bundy tube carrier. That is, when the first Bundy tube carrier 3 and the second Bundy tube carrier are side by side, the push pin on the first Bundy tube carrier 3 faces the second Bundy tube carrier, and the push pin on the second Bundy tube carrier faces the first Bundy tube carrier 3.

[0029] In this embodiment, the horizontal feeding and return support frame 1 and the vertical feeding and return support frame 2 are fixed side by side. The horizontal feeding and return structure 7 is fixed on the horizontal feeding and return support frame 1, and the vertical feeding and return structure 8 is fixed on the vertical feeding and return support frame 2. The first Bondi tube carrier 3 and the second Bondi tube carrier both cooperate with the horizontal feeding and return structure 7, and the horizontal feeding and return structure 7 and the vertical feeding and return structure 8 cooperate with each other.

[0030] The horizontal feeding and returning structure 7 in this embodiment includes a station switching cylinder 71, two suspension fixing components 72, a first lifting beam 73, a second lifting beam 74, a motor 75, a horizontal feeding and returning reducer 76, a driving roller 77, a driven roller 78, a horizontal synchronous belt 79, a cylinder fixing plate 710, a first pushing cylinder 711, a second pushing cylinder 712, a first pushing material component 713, a second pushing material component 714, a first lifting rail 715, and a second lifting rail 716. Each suspension fixing component 72 includes a suspension fixing groove 7. 20. Linear guide rail 721 and linear bearing 722. The top of the suspension fixing groove 720 is slidably connected to the top of the horizontal feeding and returning support frame 1. The linear guide rail 721 is fixed to the bottom of the suspension fixing groove 720. The two ends of the linear bearing 722 are respectively fixed to the top of the first lifting beam 73 and the top of the second lifting beam 74. The first lifting beam 73 and the second lifting beam 74 are parallel and there is a gap between them to accommodate the driving roller 77, the driven roller 78 and the horizontal synchronous belt 79. The linear guide rail 721 is mounted on the linear bearing 722.

[0031] In this embodiment, the station switching cylinder 71 is fixed to the top of the horizontal feed and return support frame 1. The piston rod of the station switching cylinder 71 is horizontal, and the station switching cylinder 71 is located between two suspension fixing members 72. The piston rod of the station switching cylinder 71 is fixed to the top of the first lifting beam 73. Two horizontal cantilever arms 6 are provided at the top of the vertical feed and return support frame 2. The suspension fixing groove 720 in one suspension fixing member 72 is slidably connected to the bottom of one cantilever arm 6, and the suspension fixing groove 720 in the other suspension fixing member 72 is slidably connected to the bottom of the other cantilever arm 6. The station switching cylinder 71 can push and pull the first lifting beam 73, so that the suspension fixing groove 720 can slide back and forth along the cantilever arm 6, thereby achieving the function of switching the station.

[0032] In this embodiment, the motor 75 is fixed to one end of the second lifting beam 74. The horizontal feed return reducer 76 is connected to the motor 75, the drive roller 77 is connected to the horizontal feed return reducer 76, and the driven roller 78 is installed at the other end of the second lifting beam 74. The drive roller 77 and the driven roller 78 are connected by a horizontal synchronous belt 79. The drive roller 77, the driven roller 78, and the horizontal synchronous belt 79 are all located between the first lifting beam 73 and the second lifting beam 74. The top of the cylinder fixing plate 710 is fixed to the bottom surface of the horizontal synchronous belt 79, and both sides of the cylinder fixing plate 710 are slidably connected to the first lifting beam 73 and the second lifting beam 74 respectively through a sliding groove and sliding rail structure, which is more conducive to ensuring the stability of the cylinder fixing plate 710. Both the first pushing cylinder 711 and the second pushing cylinder 712 are fixed to the bottom of the cylinder fixing plate 710, and the piston rods of the first pushing cylinder 711 and the second pushing cylinder 712 are vertically downward. The top of the first pushing component 713 and the top of the second pushing component 714 are respectively connected to the piston rods of the first pushing cylinder 711 and the second pushing cylinder 712. The bottom of the first pushing component 713 is provided with a first sleeve notch 723 that cooperates with the pushing pin on the first Bondi tube carrier 3. The bottom of the second pushing component 714 is provided with a second sleeve notch 724 that cooperates with the pushing pin on the second Bondi tube carrier.

[0033] In this embodiment, the first hanging rail 715 and the second hanging rail 716 are respectively fixed below the first hanging beam 73 and the second hanging beam 74. The bottom of the first hanging rail 715 is provided with a first material groove 725 that cooperates with the slide rail 4 on the first Bundy tube support 3. The bottom of the second hanging rail 716 is provided with a second material groove 726 that cooperates with the slide rail 4 on the second Bundy tube support. The side of the first lifting rail 715 is fixed by at least two vertical plates 727 and the side of the first lifting beam 73. The first lifting rail 715 is located directly below the first lifting beam 73. The side of the second lifting rail 716 is fixed by at least two vertical plates 727 and the side of the second lifting beam 74. The second lifting rail 716 is located directly below the second lifting beam 74. The first lifting rail 715 and the second lifting rail 716 are parallel. The first material trough 725 in the first lifting rail 715 and the second material trough 726 in the second lifting rail 716 are parallel.

[0034] In this embodiment, the horizontal synchronous belt 79 can be rotated by the motor 75, and then the horizontal synchronous belt 79 drives the cylinder fixing plate 710 to move. The first push cylinder 711 and the second push cylinder 712, which are fixed to the bottom surface of the cylinder fixing plate 710, move synchronously. When the first push cylinder 711 presses down on the first push material 713, the first sleeve notch 723 in the first push material 713 can be fitted onto the push pin of the first Bundy tube carrier 3, thereby driving the first Bundy tube carrier 3 to move synchronously. When the second push cylinder 712 presses down on the second push material 714, the second sleeve notch 724 in the second push material 714 can be fitted onto the push pin of the second Bundy tube carrier, thereby driving the second Bundy tube carrier to move synchronously.

[0035] The vertical feeding and return structure 8 in this embodiment includes a carrier beam 81, a carrier positioning cylinder 82, a stepper motor 83, a vertical feeding and return reducer 84, a transmission rod 85, two upper rollers 86, two lower rollers 87, and two vertical synchronous belts 88. The stepper motor 83 and the vertical feeding and return reducer 84 are both fixed to the top of the vertical feeding and return support frame 2. The vertical feeding and return reducer 84 is connected to the stepper motor 83, and the transmission rod 85 is connected to the vertical feeding and return reducer 84. The transmission rod 85 is connected to the vertical feeding and return support frame 2 via two bearing seats. The two upper rollers 86 are respectively fixed to both ends of the transmission rod 85, and the two lower rollers 87 are respectively fixed to both sides of the vertical feeding and return support frame 2. One upper roller 86 and one lower roller 87 form a group and are connected by a vertical synchronous belt 88. The two ends of the carrier beam 81 are fixed on two vertical synchronous belts 88 respectively, and the carrier beam 81 is horizontal. The bottom of the carrier beam 81 is provided with a material trough 89 that cooperates with the slide rail 4 on the first Bundy tube carrier 3 and the second Bundy tube carrier. The carrier positioning cylinder 82 is installed on the carrier beam 81 to position the slide rail 4 located in the material trough 89.

[0036] In this embodiment, the Bondi tube feeding and returning mechanism is initially aligned with the first material trough 725 in the first hanging rail 715 and the material trough 89 in the carrier beam 81. The first pushing cylinder 711 presses down the first pushing material component 713, and the Bondi tube 200 to be welded hangs on the first Bondi tube carrier 3. The first sleeve notch 723 in the first pushing material component 713 is fitted onto the pushing pin of the first Bondi tube carrier 3 located in the first material trough 725. The first Bondi tube carrier 3 is moved from the first material trough 725 into the material trough 89 by the horizontal synchronous belt 79. Then, the first pushing cylinder 711 controls the first pushing material component 713 to rise and retract a certain distance, and the stepper motor 83 controls the carrier beam 81 to rise step by step. The condenser tube welding machine is on the Bondi tube 100 steel wires are welded onto the 200. After welding, the carrier beam 81 is lowered and reset. The material trough 89 in the carrier beam 81 and the first material trough 725 in the first hanging rail 715 are aligned. The first Bondi tube carrier 3 is moved from the material trough 89 into the first material trough 725 by the first pushing material component 713. Then, the work position is switched by the work position switching cylinder 71, so that the second material trough 726 in the second hanging rail 716 and the material trough 89 in the carrier beam 81 are aligned. The second pushing material component 714 is pressed down by the second pushing cylinder 712. Under the action of the motor 75, the second Bondi tube carrier is moved from the second material trough 726 into the material trough 89. The Bondi tube 200 hanging on the second Bondi tube carrier is welded by the condenser tube welding machine. This cycle is repeated. The condenser tube welding machine is used to weld steel wire 100 onto Bundy tube 200. It is common knowledge to those skilled in the art that steel wire 100 needs to be welded onto Bundy tube 200.

[0037] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A Bundy tube feeding and return mechanism for a condenser tube welding machine, characterized in that: The system includes a horizontal feed and return support frame (1), a vertical feed and return support frame (2), a first Bundy tube support (3), a second Bundy tube support, a horizontal feed and return structure (7), and a vertical feed and return structure (8). The first Bundy tube support (3) has a slide rail (4) at its top and two Bundy tube hangers (5) at its bottom for hanging the Bundy tubes (200). The first Bundy tube support (3) has a push pin at one end of its side. The second Bundy tube support (3) has a slide rail (4) at its top and two Bundy tube hangers (5) at its bottom for hanging the Bundy tubes (200). The structure of the Bundy tube carrier is the same as that of the first Bundy tube carrier (3); the horizontal return material support frame (1) and the vertical return material support frame (2) are fixed side by side, the horizontal return material structure (7) is fixed on the horizontal return material support frame (1), the vertical return material structure (8) is fixed on the vertical return material support frame (2), the first Bundy tube carrier (3) and the second Bundy tube carrier are both matched with the horizontal return material structure (7), and the horizontal return material structure (7) and the vertical return material structure (8) are matched.

2. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 1, characterized in that: The horizontal feeding and return structure (7) includes a station switching cylinder (71), two suspension fixing parts (72), a first lifting beam (73), a second lifting beam (74), a motor (75), a horizontal feeding and return reducer (76), a driving roller (77), a driven roller (78), a horizontal synchronous belt (79), a cylinder fixing plate (710), a first pushing cylinder (711), a second pushing cylinder (712), a first pushing material part (713), a second pushing material part (714), a first lifting rail (715), and a second lifting rail (716). Each suspension fixing part (72) includes a suspension fixing groove (720), a linear guide rail (721), and a linear bearing (722). The top of the suspension fixing groove (720) The linear guide rail (721) is fixed to the bottom of the suspension fixing groove (720) and the two ends of the linear bearing (722) are respectively fixed to the top of the first lifting beam (73) and the top of the second lifting beam (74). The first lifting beam (73) and the second lifting beam (74) are parallel and there is a gap between them to accommodate the driving roller (77), the driven roller (78) and the horizontal synchronous belt (79). The linear guide rail (721) is mounted on the linear bearing (722). The station switching cylinder (71) is fixed to the top of the horizontal feeding and returning support frame (1). The piston rod of the station switching cylinder (71) is horizontal. The piston rod is fixed to the top of the first lifting beam (73); the motor (75) is fixed to one end of the second lifting beam (74); the horizontal feed return reducer (76) is connected to the motor (75); the driving roller (77) is connected to the horizontal feed return reducer (76); the driven roller (78) is installed at the other end of the second lifting beam (74); the driving roller (77) and the driven roller (78) are connected by a horizontal synchronous belt (79); the driving roller (77), the driven roller (78), and the horizontal synchronous belt (79) are all located between the first lifting beam (73) and the second lifting beam (74); the top of the cylinder fixing plate (710) is fixed to the bottom surface of the horizontal synchronous belt (79); the first push cylinder Both (711) and the second push cylinder (712) are fixed at the bottom of the cylinder fixing plate (710), and the piston rods of the first push cylinder (711) and the second push cylinder (712) are vertically downward. The top of the first push component (713) and the top of the second push component (714) are respectively connected to the piston rods of the first push cylinder (711) and the second push cylinder (712). The bottom of the first push component (713) is provided with a first sleeve notch (723) that cooperates with the push pin on the first Bondi tube carrier (3). The bottom of the second push component (714) is provided with a second sleeve notch (724) that cooperates with the push pin on the second Bondi tube carrier.The first hanging rail (715) and the second hanging rail (716) are respectively fixed below the first hanging beam (73) and the second hanging beam (74). The bottom of the first hanging rail (715) is provided with a first material trough (725) that cooperates with the slide rail (4) on the first Bundy tube support (3). The bottom of the second hanging rail (716) is provided with a second material trough (726) that cooperates with the slide rail (4) on the second Bundy tube support.

3. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 1, characterized in that: The vertical feeding and return structure (8) includes a carrier beam (81), a carrier positioning cylinder (82), a stepper motor (83), a vertical feeding and return reducer (84), a transmission rod (85), two upper rollers (86), two lower rollers (87), and two vertical synchronous belts (88). The stepper motor (83) and the vertical feeding and return reducer (84) are both fixed to the top of the vertical feeding and return support frame (2). The vertical feeding and return reducer (84) is connected to the stepper motor (83), and the transmission rod (85) is connected to the vertical feeding and return reducer (84). The two upper rollers (86) are respectively fixed to both ends of the transmission rod (85), and the two lower rollers (87) are fixed to the two lower rollers (88). Rollers (87) are fixed on both sides of the vertical feed return support frame (2). An upper roller (86) and a lower roller (87) are connected by a vertical synchronous belt (88). The two ends of the carrier beam (81) are fixed on two vertical synchronous belts (88), and the carrier beam (81) is horizontal. The bottom of the carrier beam (81) is provided with a material trough (89) that cooperates with the slide rail (4) on the first Bundy tube carrier (3) and the second Bundy tube carrier. The carrier positioning cylinder (82) is installed on the carrier beam (81) to position the slide rail (4) located in the material trough (89).

4. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 2, characterized in that: The side of the first lifting rail (715) is fixed by at least two vertical plates (727) and the side of the first lifting beam (73). The first lifting rail (715) is located directly below the first lifting beam (73). The side of the second lifting rail (716) is fixed by at least two vertical plates (727) and the side of the second lifting beam (74). The second lifting rail (716) is located directly below the second lifting beam (74). The first lifting rail (715) and the second lifting rail (716) are parallel. The first material trough (725) in the first lifting rail (715) and the second material trough (726) in the second lifting rail (716) are parallel.

5. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 2, characterized in that: The top of the vertical feeding and return support frame (2) is provided with two horizontal cantilever arms (6). The suspension fixing groove (720) in one suspension fixing component (72) is slidably connected to the bottom of one cantilever arm (6), and the suspension fixing groove (720) in the other suspension fixing component (72) is slidably connected to the bottom of the other cantilever arm (6).

6. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 3, characterized in that: The transmission rod (85) is connected to the vertical feed return support frame (2) through two bearing seats.

7. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 2, characterized in that: The workstation switching cylinder (71) is located between two suspension fixing parts (72).

8. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 2, characterized in that: Both sides of the cylinder fixing plate (710) are slidably connected to the first hanging beam (73) and the second hanging beam (74) respectively through a sliding groove and sliding rail structure.

9. The Bundy tube feeding and return mechanism of a condenser tube welding machine according to claim 1, characterized in that: The first Bundy tube carrier (3) has a push pin at one end position, and the second Bundy tube carrier has a push pin at the other end position.

Images