Pipe penetrating equipment for heat exchanger

Abstract

The invention 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 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 invention relates to the field of heat exchanger production equipment, and in particular to a heat exchanger pipe threading equipment. Background Art

[0002] The heat exchanger includes a fin group formed by stacking fins and a U-tube inserted into the fin group socket, and the U-tube includes two straight tube sections and a curved tube section connecting the two straight tube 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 a plurality of U-tubes at intervals, and the tube pushing device clamps the outer walls of the curved tube sections of a plurality of U-tubes at one time and pushes the straight tube section of the U-tube into the socket of the fin group to perform the tube threading process of the heat exchanger. However, in the process of pushing the U-tube into the socket of the fin group, the U-tube is prone to bending defects. Summary of the invention

[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, which can avoid the risk of bending defects of U tubes when threading the heat exchanger tubes.

[0004] The heat exchanger tube threading equipment according to an embodiment of the present invention 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 the first direction, 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, 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 equipment 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 table, the pull rod driving mechanism of the pull rod device drives the pull rod to move, the pull rod passes through the insertion hole 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 insertion hole of the fin group on the tube threading table, thereby completing the heat exchanger tube threading process, the pull rod plays the role of pulling the U-tube to move and guiding the U-tube to insert into the insertion hole 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 chambers arranged side by side, and the U-tube outlet is located on the side wall of the U-tube accommodating chamber.

[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 material collection box can be movably arranged on the discharge seat and has a tube insertion position and a loading position, at the tube insertion position, the material collection box is opposite to the pull rod along the first direction, at the loading position, the material collection 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 material collection box driving mechanism, and the material collection box driving mechanism is used to drive the material collection 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 needle is movably provided on the tube threading platform and can enter or leave the fin placement position, the fin stop needle can stop the position of the limiting fin, and the first positioning driver is used to drive the fin stop needle 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 drive. The guide frame is facing the feed port of the U-tube accommodating cavity along the length direction, and 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 drive 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 feeding device also includes a guide drive, wherein the guide frame is movably disposed on the feeding seat along the length direction and can be inserted into or away from the feeding port of the U-tube accommodating cavity, and the guide drive is disposed on the feeding 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 an inner hole abutment top, the inner hole abutment top 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.

[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 orifice 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, wherein the fin picking and placing mechanism includes a picking and placing rack, at least two insertion rods and an insertion rod fixer arranged side by side, one end of the insertion rod is connected to the picking and placing rack, 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 to approach or move away from the fin placement position of the tube threading platform.

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

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

[0017] Figure 1 A schematic top view of a heat exchanger tube threading device according to an embodiment of the present invention;

[0018] Figure 2 A three-dimensional schematic diagram of a tube threading platform of a heat exchanger tube threading device according to an embodiment of the present invention;

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

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

[0022] Figure 6 It 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 invention;

[0023] Figure 7 It 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 invention.

[0024] Reference numerals:

[0025] Pipe-threading station 100, fin placement position 101, fin stopper 110, feeding mechanism 120, stopper frame 130;

[0026] U-tube discharging device 200, U-tube accommodating chamber 201, U-tube outlet 202, discharging seat 210, material collecting box 220, and material collecting box driving mechanism 230;

[0027] A pull rod device 300, a pull rod driving mechanism 310, a pull rod 320, an insertion section 321, a top portion 322 of the inner hole of the pipe, an outer section 323, and a pipe opening limiting surface 324;

[0028] U-tube feeding device 400, feeding seat 410, guide frame 420, pushing frame 430, guide driver 440;

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

[0030] Unloading conveyor line 600;

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

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

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

[0034] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

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

[0036] In the description of the present invention, the linear drive structure includes structures such as oil cylinders, air cylinders, electric cylinders, screw rods, racks, transmission chains, transmission belts, linear motors and rope winch pulling, and technical personnel in this field 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 at one side of the tube threading platform 100 along the first direction, the U-tube discharge device 200 is provided with a U-tube accommodating chamber 201, and the U-tube accommodating chamber 201 is provided with a U-tube outlet 202 on the side facing the fin placement position 101; the pull rod device 300 is located at the other side of the tube threading platform 100 along the first direction, the pull rod device 300 comprises 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, 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 on 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 insertion hole 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 insertion hole 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 insertion hole of the fin group. Pulling the U-tube avoids the bending defect of the U-tube compared to pushing the U-tube, thereby avoiding the risk of bending defects of the U-tube during tube threading of the heat exchanger.

[0039] Specifically, the tie rods 320 are arranged in pairs, respectively corresponding to the two straight pipe 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 the embodiment, the U-tube discharging device 200 is provided with at least two U-tube accommodating chambers 201 arranged side by side, the U-tube outlet 202 is located on the side wall of the U-tube accommodating chamber 201, and the pull rod device 300 is provided with at least two pull rods 320. The above structure facilitates the multiple pull rods 320 to pull the multiple U-tubes at the same time to thread the fin group.

[0042] In the embodiment, the U-tube discharging device 200 includes a discharging seat 210 and at least two material collecting boxes 220 arranged side by side. The material collecting boxes 220 are arranged on the discharging seat 210, and the material collecting boxes 220 are provided with a U-tube accommodating chamber 201. A plurality of the material collecting boxes 220 are used to form a plurality of U-tube accommodating chambers 201, respectively. U-tubes can 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, so that after the pull rod 320 takes away the U-tube, the upper U-tube can automatically move to the position opposite to the U-tube outlet 202 under the action of gravity or an external mechanism to replenish materials and perform 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, and 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, and the number of U-tube accommodating chambers 201 and pull rods 320 can be two, three or more, and those skilled in the art can specifically configure according to actual needs.

[0044] In the embodiment, the U-tube accommodating chamber 201 has a feed port, and the collection box 220 can be movably arranged on the discharge seat 210 and has a tube insertion position and a loading position. In the tube insertion position, the collection box 220 is opposite to the pull rod 320 along the 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, which is used to drive the collection box 220 to move to switch the tube insertion position and the loading position. The collection box driving mechanism 230 can drive all the collection boxes 220 to pass the loading position. At this time, the collection boxes 220 passing the loading position can be reloaded with new U tubes, so that all the collection boxes 220 can be loaded at the loading position, and then moved to the tube insertion position to load the tube after the loading is completed. After the U tube is used, the collection box 220 moves back to the loading position for loading, and continuous production is carried out to improve the degree of automation of the equipment.

[0045] Specifically, the material collection box driving mechanism 230 is a transmission chain or a transmission belt of 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 feeding position and the pipe-threading position, and the feeding and pipe-threading are performed alternately. Each time the pipe is threaded, all the material collection boxes 220 move one grid, and when the material collection box 220 leaves the pipe-threading position, the loaded U-tube can be used up, and then the U-tube is replenished at the feeding position for continuous production. It is conceivable that the material collection box 220 can also be a linear track reciprocating movement to pass through the feeding position and the pipe-threading position, and the material collection box driving mechanism 230 can also be a linear drive structure, specifically referring to the example above: or the material collection box 220 moves through the feeding position and the pipe-threading position through a circular track, and is driven to move by a motor. It is understandable that in some embodiments, the U-tube discharge device 200 can also be moved as a whole, or the whole is not moved for manual feeding.

[0046] Specifically, since the adjacent fins in the stacked fin group are directly contacted and stacked only at certain positions, and other positions are arranged at intervals, 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 arranged 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 and enter 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 threaded with 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 to leave 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 driver can use a linear drive structure to make the fin stopper 110 enter or leave the fin placement position 101. For specific reference, the fin stopper 110 is installed on a plate body, driving all fin stopper 110 to move synchronously. It is conceivable that the first positioning driver can also use a manipulator, the fin stopper 110 is installed on a plate body, and the manipulator drives the plate body to move.

[0049] In the embodiment, the tube-threading platform 100 is provided with a material unloading mechanism 120, and a material unloading conveyor line 600 is provided on one side of the tube-threading platform 100. The material unloading mechanism 120 can move the heat exchanger on the fin placement position 101 into the material unloading conveyor line 600. The material unloading mechanism 120 is provided to facilitate the automatic movement of the heat exchanger after tube threading into the material unloading conveyor line 600 to move it to the next process position, thereby improving the automation degree of the equipment.

[0050] Specifically, a stop frame 130 and a stop driver are provided on one side of the tube threading platform 100 close to the material unloading conveyor line 600. The stop driver can drive the stop frame 130 to rise and fall. The stop frame 130 can rise to one side of the fin placement position 101, or fall to avoid the fin placement position 101. After the stop frame 130 falls, the heat exchanger can be horizontally moved out of the tube threading platform 100 and enter the material unloading conveyor line 600. Specifically, the stop driver can adopt the linear drive structure exemplified 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 row of U tubes is temporarily fixed by a bracket, and the guide frame 420 is inserted between two straight tube sections of a row of U tubes to arrange the U tubes on the guide frame 420. The bracket descends to make room for the pusher frame 430 to move. At this time, the pusher driver drives the pusher frame 430 to move along the guide frame 420, and pushes the U tubes on the guide frame 420 into the U tube accommodating cavity 201 in sequence to load the U tubes, so as to facilitate the continuous stacking of U tubes in the U tube accommodating cavity 201. When the U tubes are automatically loaded, they can be stacked relatively as a whole. After loading is completed, the pusher driver drives the pusher frame 430 to reset 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 also be a strip-shaped plate, etc., as long as it can support and guide the U-tube to enter the U-tube accommodating cavity 201 .

[0054] In the embodiment, the U-tube feeding device 400 further includes a guide driver 440. The guide frame 420 is movably arranged on the feeding seat 410 along the length direction and can be inserted into or away from the feeding port of the U-tube accommodating cavity 201. The guide driver 440 is arranged on the feeding seat 410 and is used to drive the guide frame 420 to move. The guide driver 440 drives the guide frame 420 to insert into the U-tube accommodating cavity 201. When the U-tube is pushed into the U-tube accommodating cavity 201, it can be avoided that the U-tube does not enter the U-tube accommodating cavity 201 due to an accident, and the feeding stability is better; the guide driver 440 drives the guide frame 420 away from the U-tube accommodating cavity 201, which can facilitate the guide frame 420 to switch and insert into different U-tube accommodating cavities 201, and is flexible and convenient to use.

[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 the U-tube, and the insertion section 321 is provided with a tube inner hole abutment top 322, and the tube inner hole abutment 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 inner hole abutting top 322 includes two or more elastic arms, the outer diameter formed by the free ends of all the elastic arms is larger than the diameter of the inner hole of the U tube, and the free ends have a guide surface for guiding the insertion into the inner hole of the U tube. When the insertion section 321 of the pull rod 320 is inserted into the inner hole of the straight tube section of the U tube, the guide surface is abutted by the inner hole orifice, so that the elastic arm is elastically deformed, thereby reducing the outer diameter size of the tube inner hole abutting top 322, so that the insertion section 321 can be inserted into the straight tube section. When the elastic arm is in the straight tube section, it continues to abut the inner hole wall of the straight tube section under the action of the elastic force, so that static friction is generated between the two, so that the pull rod 320 can pull the U tube to move. After the U tube is inserted into the fin group, the fin group fixes the U tube, so that the U tube no longer moves with the pull rod 320, and the pull rod 320 and the inner hole of the U tube have dynamic friction, and finally the pull rod 320 is out of the inner hole of the U tube. It can be understood that other positions of the elastic arm can also convexly abut the inner hole of the U tube.

[0058] It is conceivable that the inner hole of the tube can also be 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 a rubber block that can be inflated to increase the outer diameter of the inner hole of the tube, or a mechanical structure is used to expand the outer diameter of the inner hole of the tube, etc., and those skilled in the art can make specific configurations according to actual needs. It is understandable that the insertion section 321 can be provided with one or more inner hole of the tube top 322, and those skilled in the art can make specific configurations according to actual needs.

[0059] In the embodiment, the pull rod 320 is provided with an outer section 323, one end of the outer section 323 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 limiting surface 324 is formed at one end of the outer section 323 close to the insertion section 321. When the insertion section 321 of the pull rod 320 is inserted into the inner hole of the straight pipe section, when the pipe opening of the U pipe abuts against the pipe opening limiting surface 324, the insertion section 321 is completely inserted into the straight pipe section of the U pipe, so that the transition between the outer section 323 and the U pipe is relatively smooth and convenient for 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 321 can be reduced to be 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 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 tube threading platform 100. When the fin group needs to be placed on the tube insertion 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 drive the rod 520 to move, and the multiple rods 520 pass through the insertion holes of the fin group. Then the rod holder 530 re-fixes the other end of the rod 520, and the fin group and the rod 520 are lifted. 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, and then the plunger holder 530 can release the other end of the plunger 520. Since the fin group is horizontally positioned on the tube-threading platform 100 through the first fin positioning assembly, the pick-and-place drive assembly moves the fin pick-and-place mechanism 500 along the length direction of the plunger 520, and the plunger 520 can be pulled out of the fin group. Then the pick-and-place drive assembly can drive the fin pick-and-place mechanism 500 to pick up materials again. The above-mentioned fin pick-and-place mechanism 500 cooperates with the pick-and-place drive assembly to realize automatic placement of the fin group on the tube-threading platform 100, with a simple structure and good use effect.

[0062] Specifically, the fin placing and retrieving 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 may be a finger cylinder, which can clamp or release the other end of the rod 520, and cooperate with the pick-and-place rack 510 to lift the rod 520 to prevent the rod 520 from bending. It is conceivable that the rod holder 530 may also be other structures, for example, the rod holder 530 includes a hook and a rotating cylinder, the hook is rotatably connected to the pick-and-place rack 510 and can be rotated to hold the rod 520 or away from the rod 520, and the rotating cylinder is connected to the hook and is used to drive the hook to rotate; or the rod 520 driver may also be an electromagnet, which directly fixes the other end of the rod 520 with magnetic attraction.

[0064] Specifically, the pick-and-place drive assembly may adopt a multi-axis robot arm, or a multi-axis moving mechanism, such as an overhead crane, etc., to drive the fin pick-and-place mechanism 500 to move in translation and rotation. Those skilled in the art may configure it specifically according to actual needs.

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

[0066] In the description of this specification, the description with reference to the terms "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 the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit 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 tube threading device, characterized in that: include: The tube insertion platform (100) is provided with a fin placement position (101); A U-tube discharging device (200) is located on one side of the tube threading platform (100) along a first direction, the U-tube discharging device (200) is provided with a U-tube accommodating chamber (201), and a U-tube outlet (202) is provided on one side of the U-tube accommodating chamber (201) facing the fin placement position (101); A pull rod device (300) is located on the other side of the tube threading platform (100) along a 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 tube threading platform (100).

2. The heat exchanger tube 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 tube threading device according to claim 2, characterized in that: The U-tube discharge device (200) comprises a discharge seat (210) and at least two material collection boxes (220) arranged side by side, wherein the material collection box (220) is arranged on the discharge seat (210), and the material collection box (220) is 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 material collection 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 material collection box (220) is opposite to the pull rod (320) along the first direction. At the loading position, the material collection 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 material collection box driving mechanism (230), and the material collection box driving mechanism (230) is used to drive the material collection box (220) to move so as to switch between the tube insertion position and the loading position.

5. The heat exchanger tube 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 arranged 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 fins. 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), wherein the U-tube loading device (400) is located on one side of the U-tube discharging device (200), and 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 disposed along the length direction toward the feed port of the U-tube accommodating cavity (201), and the pushing frame (430) is movably disposed 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), and the pushing drive is disposed on the loading seat (410) and is used to drive the pushing frame (430) to move.

7. The heat exchanger tube threading device according to claim 6, characterized in that: The U-tube feeding device (400) further comprises a guide driver (440), wherein the guide frame (420) is movably arranged on the feeding 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 feeding seat (410) and is used to drive the guide frame (420) to move.

8. The heat exchanger tube threading device according to claim 1, characterized in that: The pull rod (320) is provided with an insertion section (321) for inserting the U-tube, and the insertion section (321) is provided with a tube inner hole abutment top (322), and the tube inner hole abutment 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 tube 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 tube threading device according to claim 1, characterized in that: The fin picking and placing mechanism (500) 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).

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