Pipe penetrating equipment for heat exchanger

Abstract

The utility model discloses pipe penetrating equipment for a heat exchanger. The pipe penetrating equipment comprises a pipe penetrating table, a U-shaped pipe discharging device and a pull rod device. The pipe penetrating table is provided with a fin placement position; the U-shaped pipe discharging device is located on one side of the pipe penetrating table in the first direction and provided with a U-shaped pipe containing cavity, and a U-shaped pipe outlet is formed in the side, facing the fin placing position, of the U-shaped pipe containing cavity. The U-shaped pipe discharging device combines a U-shaped pipe bending machine and heat exchanger pipe penetrating equipment, and has the functions of automatic discharging, pipe penetrating and automatic discharging. A traditional mode that a U-shaped pipe is pushed to be matched with a guide rod to be inserted into a fin set is changed into a mode that the U-shaped pipe is pulled to be inserted into an insertion hole of the fin set through a pull rod, the bending defect of the U-shaped pipe is overcome compared with the mode that the U-shaped pipe is pushed, and therefore the risk that the U-shaped pipe is bent when the pipe penetrates through the heat exchanger can be avoided; an additional machine mechanism is basically not added, and a U-shaped pipe pushing mechanism is omitted, so that the structure of the pipe penetrating equipment of the heat exchanger is simplified.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger production equipment, in particular to a heat exchanger pipe threading device. Background Art

[0002] The heat exchanger includes a fin group formed by stacking fins and a U-tube inserted into the jack of the fin group. The U-tube includes two straight sections and a curved section connecting the two straight sections. Some existing heat exchanger tube-threading equipment includes a tube-threading table, a U-tube discharging device, and a tube-pushing device. The fin group to be threaded is placed on the tube-threading table. The U-tube discharging device arranges the multiple U-tubes at intervals. The tube-pushing device clamps the outer walls of the curved sections of the multiple U-tubes at one time and pushes the straight sections of the U-tubes into the jack of the fin group to carry out the tube-threading process of the heat exchanger. However, in the process of pushing the U-tube into the jack of the fin group, the U-tube is prone to bending defects. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a heat exchanger tube threading device that can avoid the risk of U-tube bending defects during heat exchanger tube threading.

[0004] According to an embodiment of the present invention, the heat exchanger tube threading equipment includes a tube threading platform, a U-tube discharge device, and a pull rod device. The tube threading platform is provided with a fin placement position; the U-tube discharge device is located on one side of the tube threading platform along a first direction, and the U-tube discharge device is provided with a U-tube accommodating cavity, and the U-tube accommodating cavity is provided with a U-tube outlet on the side facing the fin placement position; the pull rod device is located on the other side of the tube threading platform along the first direction, and the pull rod device includes a pull rod driving mechanism and a pull rod, the pull rod is arranged along the first direction, the pull rod driving mechanism is used to drive the pull rod to move along the first direction, and the pull rod can pull the U-tube in the U-tube accommodating cavity from the U-tube outlet to the tube threading platform.

[0005] The heat exchanger tube threading device according to the embodiment of the present invention has at least the following beneficial effects: the fin group is placed in the fin placement position of the tube threading platform, the pull rod driving mechanism of the pull rod device drives the pull rod to move, the pull rod passes through the socket of the fin group and moves to the U-tube arrangement device, and then the pull rod connects the U-tube in the U-tube accommodating cavity, and when the pull rod is reset, it pulls the U-tube to move, so that the straight tube section of the U-tube is inserted into the socket of the fin group on the tube threading platform, thereby completing the heat exchanger tube threading process, and the pull rod plays the role of pulling the U-tube to move and guiding the U-tube to insert into the socket of the fin group, and pulling the U-tube avoids the U-tube bending defect compared to pushing the U-tube, thereby avoiding the risk of U-tube bending defects during heat exchanger tube threading.

[0006] According to some embodiments of the present invention, the U-tube discharging device is provided with at least two U-tube accommodating cavities arranged side by side, and the U-tube outlet is located on the side wall of the U-tube accommodating cavity.

[0007] According to some embodiments of the present invention, the U-tube discharge device includes a discharge seat and at least two material collection boxes arranged side by side. The material collection box is arranged on the discharge seat, and the material collection box is provided with the U-tube accommodating cavity.

[0008] According to some embodiments of the present invention, the U-tube accommodating cavity has a feed port, the aggregate box can be movably arranged on the discharge seat and has a tube insertion position and a loading position, in the tube insertion position, the aggregate box is opposite to the pull rod along the first direction, in the loading position, the aggregate box moves to a position where the U-tube can be placed in the U-tube accommodating cavity, and the U-tube discharge device also includes a aggregate box driving mechanism, which is used to drive the aggregate box to move to switch the tube insertion position and the loading position.

[0009] According to some embodiments of the present invention, the tube threading platform is provided with at least two fin stop needles and a first positioning driver, the fin stop needles are movably provided on the tube threading platform and can enter or leave the fin placement position, the fin stop needles can stop the position of the limiting fin, and the first positioning driver is used to drive the fin stop needles to move.

[0010] According to some embodiments of the present invention, a U-tube loading device is further included, which is located on one side of the U-tube discharging device. The U-tube loading device includes a loading seat, a guide frame, a pushing frame and a pushing driver. The guide frame is facing the feed port of the U-tube accommodating cavity along the length direction. The pushing frame is movably arranged on the loading seat and can move along the length direction of the guide frame. The pushing frame can push the U-tube on the guide frame into the U-tube accommodating cavity. The pushing driver is arranged on the loading seat and is used to drive the pushing frame to move.

[0011] According to some embodiments of the present invention, the U-tube loading device also includes a guide drive, the guide frame is movably arranged on the loading seat along the length direction and can be inserted into or away from the feed port of the U-tube accommodating cavity, and the guide drive is arranged on the loading seat and is used to drive the guide frame to move.

[0012] According to some embodiments of the present invention, the pull rod is provided with an insertion section for inserting into the U-tube, the insertion section is provided with a top portion of the inner hole of the tube, the top portion of the inner hole of the tube includes at least two elastic arms, and the elastic arms can be elastically deformed to insert into the inner hole of the U-tube and abut against the inner hole wall.

[0013] According to some embodiments of the present invention, the pull rod is provided with an external section, one end of the external section is connected to one end of the insertion section, the outer diameter of the external section is larger than the outer diameter of the insertion section, and a pipe mouth limiting surface is formed on the external section near one end of the insertion section.

[0014] According to some embodiments of the present invention, a fin picking and placing mechanism and a picking and placing drive assembly are further included. The fin picking and placing mechanism includes a picking and placing rack, at least two insertion rods arranged side by side, and an insertion rod fixer. One end of the insertion rod is connected to the picking and placing rack, and the insertion rod fixer is arranged on the picking and placing rack and can fix or loosen the other end of the insertion rod. The picking and placing drive assembly is connected to the fin picking and placing mechanism and is used to drive the fin picking and placing mechanism to move, and can drive the fin picking and placing mechanism close to or away from the fin placement position of the pipe threading platform.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic top view of a heat exchanger pipe threading device according to an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of a pipe threading platform of a heat exchanger pipe threading device according to an embodiment of the present utility model;

[0019] Figure 3 This is a three-dimensional schematic diagram of a U-tube discharge device of a heat exchanger tube threading device according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of a material collecting box of a heat exchanger pipe threading device according to an embodiment of the present utility model;

[0021] Figure 5 A schematic diagram of a pull rod of a heat exchanger tube threading device according to an embodiment of the present utility model;

[0022] Figure 6 This is a three-dimensional schematic diagram of a U-tube feeding device of a heat exchanger tube threading device according to an embodiment of the present utility model;

[0023] Figure 7 This is a three-dimensional schematic diagram of the fin removal and placement mechanism of the heat exchanger tube threading device according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] Pipe threading platform 100, fin placement position 101, fin stopper 110, blanking mechanism 120, stop frame 130;

[0026] U-tube discharge device 200, U-tube accommodating chamber 201, U-tube outlet 202, discharge seat 210, collection box 220, collection box driving mechanism 230;

[0027] Pull rod device 300, pull rod driving mechanism 310, pull rod 320, insertion section 321, pipe inner hole abutment top 322, outer section 323, pipe mouth limiting surface 324;

[0028] U-tube loading device 400, loading base 410, guide frame 420, pusher frame 430, guide driver 440;

[0029] Fin pick-up and placement mechanism 500, pick-up and placement rack 510, insertion rod 520, insertion rod holder 530;

[0030] Unloading conveyor line 600;

[0031] The longitudinal direction A of the guide frame. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are 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 cannot be understood as a limitation on the present invention.

[0034] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] In the description of the present invention, the linear drive structure includes structures such as an oil cylinder, an air cylinder, an electric cylinder, a screw rod, a rack, a transmission chain, a transmission belt, a linear motor and a rope winch pull. Those skilled in the art can make specific configurations according to actual needs.

[0037] Reference Figures 1 to 7 , is a heat exchanger tube threading device according to an embodiment of the present invention, comprising a tube threading platform 100, a U-tube discharge device 200, and a pull rod device 300. The tube threading platform 100 is provided with a fin placement position 101; the U-tube discharge device 200 is located on one side of the tube threading platform 100 along a first direction, and the U-tube discharge device 200 is provided with a U-tube accommodating chamber 201, and a U-tube outlet 202 is provided on the side of the U-tube accommodating chamber 201 facing the fin placement position 101; the pull rod device 300 is located on the other side of the tube threading platform 100 along the first direction, and the pull rod device 300 comprises a pull rod driving mechanism 310 and a pull rod 320, the pull rod 320 being arranged along the first direction, the pull rod driving mechanism 310 being used to drive the pull rod 320 to move along the first direction, and the pull rod 320 can pull the U-tube in the U-tube accommodating chamber 201 from the U-tube outlet 202 to move to the tube threading platform 100.

[0038] The fin group is placed in the fin placement position 101 of the tube threading platform 100, and the pull rod driving mechanism 310 of the pull rod device 300 drives the pull rod 320 to move. The pull rod 320 passes through the socket of the fin group and moves to the U-tube arrangement device. Then the pull rod 320 connects the U-tube in the U-tube accommodating cavity 201. When the pull rod 320 is reset, it pulls the U-tube to move, so that the straight tube section of the U-tube is inserted into the socket of the fin group on the tube threading platform 100, thereby completing the tube threading process of the heat exchanger. The pull rod 320 plays the role of pulling the U-tube to move and guiding the U-tube to insert into the socket of the fin group, and pulling the U-tube avoids the U-tube bending defect compared to pushing the U-tube, thereby avoiding the risk of U-tube bending defects during tube threading of the heat exchanger.

[0039] Specifically, the tie rods 320 are arranged in pairs, corresponding to the two straight sections of the U-tube. The tie rod device 300 may include two or more pairs of tie rods 320, and those skilled in the art may configure the tie rods 320 according to actual needs.

[0040] Specifically, the pull rod driving mechanism 310 is a linear driving structure, and the details can be referred to the above examples.

[0041] In this embodiment, the U-tube discharge device 200 is provided with at least two U-tube accommodating chambers 201 arranged side by side, with the U-tube outlet 202 located on the sidewall of the U-tube accommodating chamber 201. The pull rod device 300 is provided with at least two pull rods 320. This structure facilitates the simultaneous pulling of multiple U-tubes by the multiple pull rods 320 to thread the fin assembly.

[0042] In an embodiment, the U-tube discharge device 200 includes a discharge seat 210 and at least two side-by-side collection boxes 220. The collection boxes 220 are disposed on the discharge seat 210 and are provided with U-tube accommodating chambers 201. A plurality of collection boxes 220 are used to form a plurality of U-tube accommodating chambers 201, each of which allows U-tubes to be stacked in batches and placed in the U-tube accommodating chambers 201. A U-tube outlet 202 is provided on one side of the U-tube accommodating chamber 201. After the pull rod 320 removes the U-tube, the upper U-tube can automatically move under the action of gravity or an external mechanism to the position opposite the U-tube outlet 202 for refilling, thereby performing continuous production.

[0043] Specifically, the fin group of the heat exchanger is inserted with a plurality of U-tubes, so the U-tube discharge device 200 is provided with two or more U-tube accommodating chambers 201, and each heat exchanger may include two or more U-tubes. The U-tube discharge device 200 is provided with two or more collecting boxes 220 to form a corresponding number of U-tube accommodating chambers 201. The number of collecting boxes 220 can be specifically configured by those skilled in the art according to actual needs. It is conceivable that the U-tube discharge device 200 can also form a plurality of U-tube accommodating chambers 201 by other means, such as directly forming a plurality of U-tube accommodating chambers 201 through a shell. The number of U-tube accommodating chambers 201 and the pull rods 320 can be two, three or more, and those skilled in the art can specifically configure them according to actual needs.

[0044] In an embodiment, the U-tube accommodating chamber 201 has a feed port, and the collection box 220 is movably arranged on the discharge seat 210 and has a pipe insertion position and a loading position. In the pipe insertion position, the collection box 220 is opposite to the pull rod 320 along a first direction. In the loading position, the collection box 220 moves to a position where the U-tube can be placed in the U-tube accommodating chamber 201. The U-tube discharge device 200 also includes a collection box driving mechanism 230. The collection box driving mechanism 230 is used to drive the collection box 220 to move to switch between the pipe insertion position and the loading position. The collection box driving mechanism 230 can drive all the collection boxes 220 to pass through the loading position. At this time, the collection boxes 220 that have passed the loading position can be reloaded with new U-tubes, so that all the collection boxes 220 can be loaded at the loading position. After loading is completed, they are moved to the pipe insertion position for pipe insertion. After the U-tube is used, the collection box 220 moves back to the loading position for loading, so as to carry out continuous production and improve the degree of automation of the equipment.

[0045] Specifically, the material collection box drive mechanism 230 is a transmission chain or transmission belt with a closed-loop structure, and all the material collection boxes 220 are arranged in a circular manner on the transmission chain, and are moved in a circular manner through the loading position and the pipe threading position, and the loading and pipe threading are performed alternately. Each time the pipe threading is performed, all the material collection boxes 220 move one grid. When the material collection box 220 leaves the pipe threading position, the loaded U-tubes can be used up, and then the U-tubes can be replenished at the loading position for continuous production. It is conceivable that the material collection box 220 can also move back and forth along a straight track to pass through the loading position and the pipe threading position, and the material collection box drive mechanism 230 can also be a linear drive structure, specifically referring to the example above; or the material collection box 220 moves through the loading position and the pipe threading position along a circular track, and is driven by a motor to move. It is understandable that in some embodiments, the U-tube discharge device 200 can also move as a whole, or remain stationary for manual loading.

[0046] Specifically, since adjacent fins in the stacked fin group are directly contacted and stacked only at certain positions, and are spaced apart at other positions, the following improvements can be made:

[0047] In an embodiment, the tube threading platform 100 is provided with at least two fin stop pins 110 and a first positioning driver. The fin stop pins 110 are movably provided on the tube threading platform 100 and can enter or leave the fin placement position 101. The fin stop pins 110 can stop the position of the limit fin, and the first positioning driver is used to drive the fin stop pins 110 to move. When the fin group is placed in the fin placement position 101 of the tube threading platform 100, all the fin stop pins 110 rise into the fin placement position 101 and are inserted into the gap position between the fins to stop and position the fins and disperse the friction between the tube, the pull rod 320 and the fin socket. After the fin group is completed in threading the U-tube, the first positioning driver drives all the fin stop pins 110 to descend and leave the fin placement position 101. At this time, the heat exchanger on the tube threading platform 100 can move horizontally away from the tube threading platform 100 and enter the next process. Specifically, the fin stop pins 110 are arranged with many distributions, which has a better positioning effect on the fin group.

[0048] Specifically, the first positioning actuator can use a linear drive structure to move the fin stop pins 110 into or out of the fin placement position 101. Specifically, referring to the example above, the fin stop pins 110 are mounted on a plate, driving all fin stop pins 110 to move synchronously. It is conceivable that the first positioning actuator can also use a robot, with the fin stop pins 110 mounted on a plate, and the robot driving the plate to move.

[0049] In this embodiment, the tube-threading platform 100 is equipped with a discharge mechanism 120. A discharge conveyor line 600 is provided on one side of the tube-threading platform 100. The discharge mechanism 120 can move the heat exchanger on the fin placement position 101 into the discharge conveyor line 600. The provision of the discharge mechanism 120 facilitates the automated transfer of the heat exchanger after tube-threading to the discharge conveyor line 600 for movement to the next process location, thereby improving the automation level of the equipment.

[0050] Specifically, a stopper 130 and a stopper actuator are provided on the side of the tube threading platform 100 near the unloading conveyor line 600. The stopper actuator can drive the stopper 130 up and down, allowing the stopper 130 to rise to the side of the fin placement position 101 or to descend away from the fin placement position 101. When the stopper 130 descends, it allows the heat exchanger to be horizontally removed from the tube threading platform 100 and onto the unloading conveyor line 600. Specifically, the stopper actuator can employ the linear drive structure described above.

[0051] In an embodiment, the heat exchanger tube threading equipment also includes a U-tube loading device 400, which is located on one side of the U-tube discharging device 200. The U-tube loading device 400 includes a loading seat 410, a guide frame 420, a pushing rack 430 and a pushing drive. The guide frame 420 is directed toward the feed port of the U-tube accommodating cavity 201 along the length direction. The pushing rack 430 is movably arranged on the loading seat 410 and can move along the length direction of the guide frame 420. The pushing rack 430 can push the U-tube on the guide frame 420 into the U-tube accommodating cavity 201. The pushing drive is arranged on the loading seat 410 and is used to drive the pushing rack 430 to move.

[0052] After the tube bender bends the copper tube into a U-tube, a bracket temporarily secures the row of U-tubes. A guide frame 420 is inserted between two straight sections of the row to arrange the U-tubes on the guide frame 420. The bracket then descends to clear space for the pusher frame 430 to move. The pusher driver then drives the pusher frame 430 along the guide frame 420, pushing the U-tubes on the guide frame 420 into the U-tube accommodating chamber 201 one by one, performing the loading operation. This facilitates the continuous stacking of U-tubes into the U-tube accommodating chamber 201, allowing the U-tubes to be stacked relatively cohesively during automated loading. After loading is complete, the pusher driver resets the pusher frame 430 to facilitate the next push.

[0053] Specifically, the guide frame 420 may be two or more rods arranged side by side, or the guide frame 420 may be a strip-shaped plate, etc., as long as it can support and guide the U-tube into the U-tube accommodating cavity 201 .

[0054] In an embodiment, the U-tube loading device 400 further includes a guide driver 440. A guide frame 420 is movably disposed along its length on the loading base 410 and can be inserted into or removed from the feed port of the U-tube accommodating chamber 201. The guide driver 440 is disposed on the loading base 410 and is used to drive the movement of the guide frame 420. The guide driver 440 drives the guide frame 420 to insert into the U-tube accommodating chamber 201. When the U-tube is pushed into the U-tube accommodating chamber 201, this prevents the U-tube from accidentally failing to enter the U-tube accommodating chamber 201, thereby improving loading stability. The guide driver 440 drives the guide frame 420 away from the U-tube accommodating chamber 201, which facilitates the switching of the guide frame 420 for insertion into different U-tube accommodating chambers 201, providing flexibility and convenience.

[0055] Specifically, the guide driver 440 can adopt the linear drive structure exemplified above to drive the guide frame 420 to move; the guide frame 420 can move relative to the loading base 410 through a slide rail and slider structure or a guide column and guide sleeve structure.

[0056] In an embodiment, the pull rod 320 is provided with an insertion section 321 for inserting into the U-tube, and the insertion section 321 is provided with a tube inner hole abutting top 322, and the tube inner hole abutting top 322 includes at least two elastic arms, which can be elastically deformed to insert into the inner hole of the U-tube and abut against the inner hole wall.

[0057] Specifically, the tube bore abutment top 322 includes two or more elastic arms, the free ends of which have an outer diameter greater than the diameter of the U-tube's inner bore, and the free ends have guide surfaces for guiding insertion into the U-tube's inner bore. When the insertion section 321 of the pull rod 320 is inserted into the inner bore of the straight section of the U-tube, the guide surface is abutted by the inner bore opening, causing the elastic arms to elastically deform, thereby reducing the outer diameter of the tube bore abutment top 322 and allowing the insertion section 321 to be inserted into the straight section. While within the straight section, the elastic arms continuously abut against the inner bore wall of the straight section under the action of elastic force, generating static friction between the two, thereby allowing the pull rod 320 to pull the U-tube to move. After the U-tube is inserted into the fin assembly, the fin assembly secures the U-tube, preventing it from moving with the pull rod 320. Dynamic friction occurs between the pull rod 320 and the U-tube's inner bore, ultimately causing the pull rod 320 to slip out of the U-tube's inner bore. It is understood that other locations of the elastic arms can also protrude outward to abut the inner bore of the U-tube.

[0058] It is conceivable that the inner hole abutting top portion 322 may also have other structures, as long as the outer diameter can be increased or decreased. For example, an elastic rubber block with an outer diameter larger than the inner hole of the tube, or an inflatable rubber block can be used to increase the outer diameter of the inner hole abutting top portion 322, or a mechanical structure can be used to expand the outer diameter of the inner hole abutting top portion 322. Those skilled in the art can make specific configurations based on actual needs. It is understandable that the insertion section 321 can be provided with one or more inner hole abutting top portions 322. Those skilled in the art can make specific configurations based on actual needs.

[0059] In this embodiment, the tie rod 320 is provided with an outer section 323, one end of which is connected to one end of the insertion section 321. The outer diameter of the outer section 323 is larger than the outer diameter of the insertion section 321, and a pipe opening stop surface 324 is formed on one end of the outer section 323 near the insertion section 321. When the insertion section 321 of the tie rod 320 is inserted into the inner hole of the straight pipe section, and when the pipe opening of the U-tube abuts the pipe opening stop surface 324, the insertion section 321 is fully inserted into the straight pipe section of the U-tube, making the transition between the outer section 323 and the U-tube relatively smooth and facilitating pipe threading.

[0060] It can be understood that the outer diameter of the inserted section 321 is slightly smaller than the inner hole diameter of the straight pipe section, the maximum outer diameter of the inner hole of the tube 321 is larger than the inner hole diameter of the straight pipe section, and the outer diameter of the inner hole of the tube 322 can be reduced to smaller than the inner hole diameter of the straight pipe section; as long as the diameter of the outer section 323 is larger than the inner hole diameter of the straight pipe section of the U-tube and is close to the outer diameter of the straight pipe section, it does not need to be inserted into the U-tube and has a smooth transition with the straight pipe section.

[0061] In an embodiment, a fin picking and placing mechanism 500 and a picking and placing drive assembly are also included. The fin picking and placing mechanism 500 includes a picking and placing rack 510, at least two insertion rods 520 arranged side by side, and an insertion rod holder 530. One end of the insertion rod 520 is connected to the picking and placing rack 510, and the insertion rod holder 530 is arranged on the picking and placing rack 510 and can fix or loosen the other end of the insertion rod 520. The picking and placing drive assembly is connected to the fin picking and placing mechanism 500 and is used to drive the fin picking and placing mechanism 500 to move, and can drive the fin picking and placing mechanism 500 to approach or move away from the fin placement position 101 of the pipe threading platform 100. When the fin group needs to be placed on the pipe threading platform 100, the pick-up and placement drive assembly first moves the fin pick-up and placement mechanism 500 to one side of the fin group, and the rod holder 530 releases the other end of the rod 520. Then the pick-up and placement drive assembly drives the pick-up and placement frame 510 to move the rod 520, and the multiple rods 520 pass through the sockets of the fin group. Then the rod holder 530 re-fixes the other end of the rod 520, and lifts the fin group and the rod 520. At this time, the fin group is suspended on the multiple rods 520. Afterwards, the pick-and-place drive assembly can drive the fin pick-and-place mechanism 500 and the fin group thereon to move onto the tube-threading platform 100. Subsequently, the insertion rod holder 530 can release the other end of the insertion rod 520. Since the fin group is horizontally positioned on the tube-threading platform 100 by the first fin positioning assembly, the pick-and-place drive assembly can now move the fin pick-and-place mechanism 500 along the length of the insertion rod 520 to pull the insertion rod 520 out of the fin group. Subsequently, the pick-and-place drive assembly can drive the fin pick-and-place mechanism 500 to re-take the material. The above-mentioned fin pick-and-place mechanism 500, in conjunction with the pick-and-place drive assembly, can realize the automated placement of the fin group on the tube-threading platform 100. It has a simple structure and good performance.

[0062] Specifically, the fin taking and placing mechanism 500 may be provided with two or more inserting rods 520 , and those skilled in the art may configure the specific configuration according to actual needs.

[0063] Specifically, the rod holder 530 can be a finger cylinder that can clamp or release the other end of the rod 520, and cooperate with the pick-and-place frame 510 to lift the rod 520 to prevent the rod 520 from bending. It is conceivable that the rod holder 530 can also have other structures. For example, the rod holder 530 includes a hook and a rotary cylinder, the hook being rotatably connected to the pick-and-place frame 510 and capable of rotating to support the rod 520 or away from the rod 520, and the rotary cylinder being connected to the hook and used to drive the hook to rotate; or the rod 520 driver can also be an electromagnet that directly magnetically fixes the other end of the rod 520.

[0064] Specifically, the pick-and-place drive assembly can adopt a multi-axis robotic arm, or a multi-axis moving mechanism, such as an overhead crane, to drive the fin pick-and-place mechanism 500 to move horizontally and rotate. Those skilled in the art can make specific configurations according to actual needs.

[0065] It is understandable that the U-tube in this solution can also be replaced by a straight tube.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat exchanger pipe threading device, characterized in that: include: The tube insertion platform (100) is provided with a fin placement position (101); A U-tube discharge device (200) is located on one side of the tube insertion platform (100) along a first direction, the U-tube discharge device (200) is provided with a U-tube accommodating cavity (201), and a U-tube outlet (202) is provided on a side of the U-tube accommodating cavity (201) facing the fin placement position (101); A pull rod device (300) is located on the other side of the pipe threading platform (100) along the first direction. The pull rod device (300) includes a pull rod driving mechanism (310) and a pull rod (320). The pull rod (320) is arranged along the first direction. The pull rod driving mechanism (310) is used to drive the pull rod (320) to move along the first direction. The pull rod (320) can pull the U-tube in the U-tube accommodating cavity (201) from the U-tube outlet (202) to move to the pipe threading platform (100).

2. The heat exchanger pipe threading device according to claim 1, characterized in that: The U-tube discharging device (200) is provided with at least two U-tube accommodating chambers (201) arranged side by side, and the U-tube outlet (202) is located on the side wall of the U-tube accommodating chamber (201).

3. The heat exchanger pipe threading device according to claim 2, characterized in that: The U-tube discharge device (200) comprises a discharge seat (210) and at least two collection boxes (220) arranged side by side, wherein the collection boxes (220) are arranged on the discharge seat (210), and the collection boxes (220) are provided with the U-tube accommodating cavity (201).

4. The heat exchanger pipe threading device according to claim 3, characterized in that: The U-tube accommodating chamber (201) has a feed port, and the collecting box (220) can be movably arranged on the discharge seat (210) and has a tube insertion position and a loading position. At the tube insertion position, the collecting box (220) is opposite to the pull rod (320) along the first direction. At the loading position, the collecting box (220) moves to a position where a U-tube can be placed in the U-tube accommodating chamber (201). The U-tube discharge device (200) also includes a collecting box driving mechanism (230), and the collecting box driving mechanism (230) is used to drive the collecting box (220) to move to switch the tube insertion position and the loading position.

5. The heat exchanger pipe threading device according to claim 1, characterized in that: The tube threading platform (100) is provided with at least two fin stopper needles (110) and a first positioning driver. The fin stopper needles (110) are movably provided on the tube threading platform (100) and can enter or leave the fin placement position (101). The fin stopper needles (110) can stop the position of the limiting fin. The first positioning driver is used to drive the fin stopper needles (110) to move.

6. The heat exchanger pipe threading device according to claim 1, characterized in that: The invention also includes a U-tube loading device (400), which is located on one side of the U-tube discharging device (200). The U-tube loading device (400) includes a loading seat (410), a guide frame (420), a pushing frame (430) and a pushing drive. The guide frame (420) is oriented toward the feed port of the U-tube accommodating cavity (201) along the length direction. The pushing frame (430) is movably arranged on the loading seat (410) and can move along the length direction of the guide frame (420). The pushing frame (430) can push the U-tube on the guide frame (420) into the U-tube accommodating cavity (201). The pushing drive is arranged on the loading seat (410) and is used to drive the pushing frame (430) to move.

7. The heat exchanger pipe threading device according to claim 6, characterized in that: The U-tube loading device (400) further includes a guide driver (440), wherein the guide frame (420) is movably arranged on the loading seat (410) along the length direction and can be inserted into or away from the feeding port of the U-tube accommodating cavity (201), and the guide driver (440) is arranged on the loading seat (410) and is used to drive the guide frame (420) to move.

8. The heat exchanger pipe threading device according to claim 1, characterized in that: The pull rod (320) is provided with an insertion section (321) for inserting into the U-tube, and the insertion section (321) is provided with a tube inner hole abutting top (322), and the tube inner hole abutting top (322) includes at least two elastic arms, and the elastic arms can be elastically deformed to be inserted into the inner hole of the U-tube and abut against the inner hole wall.

9. The heat exchanger pipe threading device according to claim 8, characterized in that: The pull rod (320) is provided with an external section (323), one end of the external section (323) is connected to one end of the insertion section (321), the outer diameter of the external section (323) is larger than the outer diameter of the insertion section (321), and a pipe mouth limiting surface (324) is formed at one end of the external section (323) close to the insertion section (321).

10. The heat exchanger pipe threading device according to claim 1, characterized in that: The invention also includes a fin picking and placing mechanism (500) and a picking and placing drive assembly. The fin picking and placing mechanism (500) includes a picking and placing frame (510), at least two insertion rods (520) arranged side by side, and an insertion rod fixer (530). One end of the insertion rod (520) is connected to the picking and placing frame (510). The insertion rod fixer (530) is arranged on the picking and placing frame (510) and can fix or loosen the other end of the insertion rod (520). The picking and placing drive assembly is connected to the fin picking and placing mechanism (500) and is used to drive the fin picking and placing mechanism (500) to move, and can drive the fin picking and placing mechanism (500) to approach or move away from the fin placement position (101) of the pipe threading platform (100).

Images