Transfer device and transfer system of heat exchange tube

Abstract

The utility model relates to the technical field of pipe machining, in particular to a heat exchange pipe transfer device and transfer system which are used for transferring a heat exchange pipe among multiple stations, the heat exchange pipe extends in the first direction, the multiple stations are arranged in the second direction perpendicular to the first direction, and the transfer device comprises a cross beam, a first guide rail and a second guide rail; the cross beam is erected above the multiple stations, extends in the second direction and is provided with a first guide rail extending in the first direction; a chain disposed at the cross beam, and at least a portion of the chain configured to move back and forth in a second direction; the pipe grabbing mechanism comprises a first sliding block in sliding connection with the first guide rail, a plurality of clamping jaws arranged at intervals in the first direction and a plurality of air cylinders driving the clamping jaws correspondingly, the clamping jaws are configured to be capable of grabbing and releasing the heat exchange pipes, the air cylinders share the same air source, and the pipe grabbing mechanism is connected to the chain; and the chain is driven by the chain to move back and forth along the second direction.

Description

Technical Field

[0001] The present application relates to the technical field of tube processing, and in particular to a heat exchange tube transfer device. Background Art

[0002] In nuclear power units, the Moisture Separator Reheater (MSR) is an indispensable key equipment. There are a large number of high-efficiency heat exchange tubes inside the Moisture Separator Reheater. Usually, the outer fins and inner strengthening threads (or inner fins) need to be processed on the wall of each high-efficiency heat exchange tube as required. In some application scenarios, since the length of the heat exchange tube in the Moisture Separator Reheater reaches nearly 40 meters, and the straightness requirements of the heat exchange tube are relatively strict, the tube blank needs to be straightened before processing the outer fins and inner strengthening threads of the heat exchange tube, and the straightened tube blank is transferred from the straightening station to the subsequent station for related processing, for example, the tube is transferred to the finning machine station for processing the outer fins and inner strengthening threads, and the heat exchange tube that has been processed with the outer fins and inner strengthening threads is transferred to the inspection station for quality inspection.

[0003] During the transfer process of the heat exchange tube, the straightness of the heat exchange tube must be strictly guaranteed to be unchanged and avoid bending. In addition, in the process of processing the heat exchange tube by the fin machine, an emulsified cutting fluid is required. When processing the fin, the inner cavity of the tube blank needs to be filled with cutting fluid. Before transferring the processed heat exchange tube to the next process, the cutting fluid in the tube needs to be discharged to the cutting fluid tank. While initially cleaning the inner wall of the heat exchange tube, the cutting fluid is also reused. Obviously, the method of transferring the heat exchange tube manually has the problems of low production efficiency and easy damage to the straightness of the heat exchange tube. Summary of the invention

[0004] In view of this, the present application proposes a transfer device and a transfer system for a heat exchange tube.

[0005] In a first aspect, a heat exchange tube transfer device is provided, which is used to transfer the heat exchange tube between a plurality of workstations, wherein the heat exchange tube extends along a first direction, and the plurality of workstations are arranged along a second direction perpendicular to the first direction, and the transfer device comprises:

[0006] a crossbeam, which is erected above the plurality of workstations and extends along the second direction, the crossbeam having a first guide rail extending along the first direction;

[0007] a chain disposed at the beam, wherein at least a portion of the chain is configured to reciprocate along the second direction;

[0008] The pipe grasping mechanism comprises a first slider slidably connected to the first guide rail, a plurality of jaws arranged in a spaced relationship along the first direction, and a plurality of cylinders respectively driving the plurality of jaws, wherein the jaws are configured to grasp and release the heat exchange tube, the plurality of cylinders share a same air source, and the pipe grasping mechanism is connected to the chain so as to move back and forth along the second direction under the drive of the chain.

[0009] In some possible implementations, the chain includes a plurality of chain links connected to each other via pins, at least one chain link has a mounting hole, and the pipe gripping mechanism is connected to the chain via a fixing buckle penetrating into the mounting hole.

[0010] In some possible implementations, the following further includes:

[0011] A first sprocket wheel is rotatably disposed at one end of the beam, and the first sprocket wheel is driven to rotate by a first motor;

[0012] a second sprocket rotatably disposed at the other end of the beam;

[0013] The chain meshes and connects the first sprocket and the second sprocket in a manner of surrounding the first sprocket and the second sprocket.

[0014] In some possible implementations, the rotation axes of the first sprocket and the second sprocket extend in the direction of gravity, and the chain has two straight extension segments extending in the second direction between the first sprocket and the second sprocket and spaced apart from each other in the first direction;

[0015] The crossbeam has a plurality of chain guide grooves extending along the second direction, and the two straight extension sections are respectively arranged in the plurality of chain guide grooves;

[0016] Wherein, the inner wall of the chain guide groove is formed of polyethylene or nylon.

[0017] In some possible implementations, the plurality of chain guide grooves are arranged into two guide groove groups spaced apart from each other in the first direction, and each guide groove group includes at least two chain guide grooves spaced apart from each other in sequence and collinear with each other in the second direction.

[0018] In some possible implementations, the pipe grasping mechanism includes:

[0019] a support arm fixed to the first slider and extending in the direction of gravity, the support arm having a second guide rail extending in the direction of gravity;

[0020] a lifting arm, comprising a second slider slidably connected to the second guide rail and also extending in the direction of gravity,

[0021] A second motor connected to the lifting arm to drive the lifting arm to move up and down;

[0022] a cross arm fixed to the lower end of the lifting arm and extending along the first direction;

[0023] Wherein, the plurality of clamps are mounted on the cross arm.

[0024] In some possible implementations, the number of the clamping jaws is two, and the two clamping jaws are respectively configured at two ends of the cross arm.

[0025] In some possible embodiments, the clamp includes a first claw body and a second claw body opposite to each other in the first direction, a downwardly opening clamping space is defined between the first claw body and the second claw body, the opening is configured to allow the heat exchange tube to enter the clamping space and to allow the heat exchange tube to leave the clamping space, and the cylinder is configured to drive the first claw body and the second claw body to move symmetrically away from and closer to each other, thereby changing the size of the clamping space.

[0026] In some possible implementations, the cross arm includes:

[0027] a first arm body, which is fixed to the lower end of the lifting arm and is divided by the lower end of the lifting arm into a first arm segment and a second arm segment arranged in the first direction;

[0028] a second arm body connected to the first arm segment in a manner that its position in the first direction is adjustable;

[0029] a third arm body connected to the second arm segment in a manner that its position in the first direction is adjustable;

[0030] Wherein, the second arm body and the third arm body respectively define the two ends of the cross arm.

[0031] In a second aspect, the present application proposes a heat exchange tube transfer system, comprising:

[0032] A plurality of transfer devices as described in the first aspect, wherein the plurality of transfer devices are arranged spaced apart along the first direction;

[0033] A first motor is connected to each chain of the transfer device via a synchronous transmission mechanism to drive each chain to move synchronously.

[0034] According to the transfer device and transfer system of the heat exchange tube provided in the present application, each clamp thereon can respectively grasp different sections of the heat exchange tube, and each clamp can synchronously perform grasping and releasing actions, thereby effectively suppressing the bending of the heat exchange tube during the transfer process and ensuring the straightness of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0036] Figure 1 It is a structural schematic diagram of a heat exchange tube transfer system provided in one embodiment of the present application.

[0037] Figure 2 yes Figure 1 Schematic diagram of the structure of a part of .

[0038] Figure 3 yes Figure 1 Schematic diagram of the structure of a part of .

[0039] Figure 4 yes Figure 3 Top view of the .

[0040] Figure 5 yes Figure 4 A partial enlarged view of .

[0041] Figure 6 yes Figure 4 Right view of .

[0042] Figure 7 yes Figure 6 Schematic diagram of the structure of a part of .

[0043] Figure 8 yes Figure 6 Schematic diagram of the structure of a part of .

[0044] Fig. 9 yes Figure 6 Schematic diagram of the structure of a part of .

[0045] Description of reference numerals:

[0046] DR1-first direction, DR2-second direction, DR3-gravity direction;

[0047] T-heat exchange tube;

[0048] 1-support frame, 2-column, 2A-first flange, 3-lateral support arm, 3A-second flange, 3B-first plate, 3C-second plate, 3D-horizontal supporting surface, 4-flange;

[0049] 5-crossbeam, 5A-chain guide groove, 6-first guide rail;

[0050] 7-chain, 7A-straight extension section, 8-chain link, 8A-mounting hole, 9-pin shaft;

[0051] 10-first sprocket, 11-second sprocket;

[0052] 12-cylinder, 13-clamping claw, 13A-clamping space, 14-first claw body, 15-second claw body;

[0053] 16-first motor, 17-second motor;

[0054] 18-support arm, 19-first slider, 20-second guide rail, 21-fixing buckle, 22-moving plate;

[0055] 23-lifting arm, 24-second slider;

[0056] 25-cross arm, 26-first arm body, 26A-first arm section, 26B-second arm section, 27-second arm body, 28-third arm body;

[0057] 29-synchronous transmission mechanism, 30-transmission shaft, 31-transfer device, 32-pipe grasping mechanism, 33-transfer system. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described below in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application. It can be understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0059] In the description of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, an object defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects, and, for example, the term "first element" itself does not mean the existence of the "second element", and the term "second element" itself does not mean the existence of the "first element". In addition, "one" or "a" and similar words do not indicate a quantity limitation, but rather indicate the existence of at least one, and "multiple" means not less than two.

[0060] In the description of the present application, the terms “including”, “having” indicate the existence of the described features, numbers, operations, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, numbers, operations, elements and / or their combinations.

[0061] In the description of the present application, reference to "one embodiment" or "some embodiments" etc. means that one or more embodiments of the present application include a particular feature, structure or characteristic described in conjunction with the embodiment. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in the present specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0062] Figures 1 to 9 The heat exchange tube transfer system 33 provided in one embodiment of the present application is shown. Figure 1 and Figure 2 The heat exchange tube T shown in FIG. 3 is transferred between stations P1, P2, P3, and P4, wherein the heat exchange tube T extends along a first direction DR1 and has a length of about 40 meters, and stations P1, P2, P3, and P4 are arranged in a second direction DR2 in the plant, and the first direction DR1 and the second direction DR2 are horizontal directions perpendicular to each other. Exemplarily, the transfer system 33 can transfer the heat exchange tube T from each of stations P1, P2, P3, and P4 to another. Figure 1 The heat exchange tubes in the embodiment may be finished heat exchange tubes or semi-finished heat exchange tubes (such as tube blanks), and this embodiment of the present application does not limit this.

[0063] The transfer system 33 includes a plurality of transfer devices 31 arranged in a spaced relationship along a first direction DR1 , and the transfer devices 31 cooperate with each other to transfer the heat exchange tube T among the workstations P1 , P2 , P3 , and P4 .

[0064] The transfer device 31 includes a crossbeam 5 , a chain 7 and a pipe grasping mechanism 32 .

[0065] The cross beam 5 is formed into a long straight shape extending in the second direction DR2, and is mounted above the aforementioned workstations P1, P2, P3, and P4 by two support frames 1 located at both ends. In addition, the cross beam 5 has a first guide rail 6 extending in the first direction DR1, and the first guide rail 6 extends substantially over the entire length of the cross beam 5.

[0066] Workstations P1, P2, P3 and P4 occupy a relatively large space in the second direction DR2. In order to allow the pipe-grasping mechanism 32 to reach the position of each workstation, the beam 5 is formed to have a length of more than ten meters. Therefore, under the action of gravity, the middle part of the beam 5 is prone to bend downward, which will affect the displacement accuracy of the pipe-grasping mechanism 32.

[0067] In this regard, in this embodiment, each of the two support frames 1 is constructed to include a column 2 and a transverse support arm 3. The column 2 extends vertically upward from the floor of the factory building, and its lower end is fastened to the bottom surface of the factory building. The transverse support arm 3 is fastened to the top of the column 2 via the flange 4, and extends from the top of the column 2 toward the other support frame 1 along the second direction DR2, and the transverse support arm 3 extends below the crossbeam 5 and supports the crossbeam 5. In detail, the flange 4 includes a first flange 2A integrally formed at the upper end of the column 2 and a second flange 3A integrally formed at the lower end of the transverse support arm 3, and a plurality of fastening bolts fasten the first flange 2A and the second flange 3A at different positions in the circumferential direction. The transverse support arm 3 supports the crossbeam 5 from below, thereby reducing the length of the middle suspended section of the crossbeam 5 to suppress the bending of the crossbeam 5. In addition, the transverse support arm 3 and the cross beam 5 are fixedly connected together via a plurality of fastening bolts not shown in the figure, which apply a force to the transverse support arm 3 and the cross beam 5 to press them against each other in the vertical direction, and at least one fastening bolt is arranged near the end of the cross beam 5.

[0068] In addition, the two support frames 1 are supported at both ends of the cross beam 5 with the workstations P1 , P2 , P3 , and P4 interposed therebetween, thereby preventing the support frames 1 from interfering with the movement of the pipe grasping mechanism 32 .

[0069] In this embodiment, the transverse support arm 3 supports the cross beam 5 over its entire length, that is, each portion of the transverse support arm 3 in the length direction provides support force to the cross beam 5, thereby better suppressing the bending of the cross beam 5. More specifically, the transverse support arm 3 has an upwardly facing horizontal supporting surface 3D, and under the connection action of the aforementioned fastening bolts, the entire portion of the horizontal supporting surface 3D is in close contact with the lower surface of the cross beam 5.

[0070] See also Figure 2 The transverse support arm 3 includes two first plates 3B spaced apart from each other in the first direction DR1, and a second plate 3C connecting the two first plates 3B at their top ends, and the second plate 3C defines the aforementioned horizontal support surface 3D of the transverse support arm 3. Each first plate 3B extends in a vertical plane, so the two first plates 3B are parallel to each other, and therefore, the transverse support arm 3 can provide a sufficiently large upward support force. In addition, the first plate 3B is formed in an L shape.

[0071] The material forming the cross beam 5 and the support frame 1 may be high-strength steel.

[0072] A mounting seat with omitted reference numerals is fixed to each end of the crossbeam 5, wherein a rotatable first sprocket 10 is mounted on one of the mounting seats, and a rotatable second sprocket 11 is mounted on the other mounting seat, and the rotation axes of the first sprocket 10 and the second sprocket 11 both extend along the gravity direction DR3 (i.e., extend vertically). The chain 7 meshes and connects the first sprocket 10 and the second sprocket 11 in a manner surrounding the first sprocket 10 and the second sprocket 11, so that the chain 7 has two relatively long straight extension sections 7A extending along the second direction DR2 between the first sprocket 10 and the second sprocket 11, and the two straight extension sections 7A are separated from each other in the second direction DR2. When the first sprocket 10 is in the Figure 1 When the first motor 16 is driven to rotate, the chain 7 and the second sprocket 11 rotate passively, and the straight extension section 7A of the chain 7 moves along the first direction DR1. When the first sprocket 10 rotates back and forth, the straight extension section 7A of the chain 7 moves back and forth along the second direction DR2. In addition, the position of the first sprocket 10 relative to the crossbeam 5 can be adjusted to adjust the tension of the chain 7.

[0073] The tube grasping mechanism 32 includes a first slider 19 slidably connected to the first guide rail 6, two clamping jaws 13 arranged in a spaced relationship along the first direction DR1, and two cylinders 12 driving the two clamping jaws 13 respectively. The clamping jaws 13 are configured to grasp and release the heat exchange tube T under the drive of the cylinders 12. In addition, the two cylinders 12 share the same air source to ensure the consistency of the driving actions of the two cylinders 12, thereby ensuring the consistency of the grasping or releasing actions of the two clamping jaws 13.

[0074] The pipe grabbing mechanism 32 is connected to the straight extension section 7A of the chain 7 so as to be reciprocally movable along the second direction DR2 under the drive of the chain 7, thereby enabling the pipe grabbing mechanism 32 to reach each of the workstations P1, P2, P3, and P4. In addition, the first guide rail 6 and the first slider 19 that slidably cooperate with each other guide the movement of the pipe grabbing mechanism 32 in the second direction DR2, thereby improving the smoothness of the movement of the pipe grabbing mechanism 32.

[0075] In the process of the straight extension section 7A of the chain 7 dragging the pipe grabbing mechanism 32 to move, the straight extension section 7A of the chain 7 may generate a relatively obvious bend, which will affect the control of the moving position of the pipe grabbing mechanism 32. For this reason, in order to suppress the aforementioned bend, in this embodiment, ten chain guide grooves 5A extending along the second direction DR2 are provided on the crossbeam 5, and these chain guide grooves 5A are arranged into two guide groove groups separated from each other in the first direction DR1, and each guide groove group includes five chain guide grooves 5A separated from each other in sequence and collinear with each other in the second direction DR2, and the two straight extension sections 7A of the chain 7 are respectively arranged in these two guide groove groups. In addition, the inner wall of the chain guide groove 5A can be formed of polyethylene or nylon to better protect the chain 7 and reduce friction.

[0076] As mentioned above, the pipe gripping mechanism 32 is connected to the straight extension 7A of the chain 7. For details, see Figure 4 and Figure 5 The chain 7 includes a plurality of links 8 connected to each other via a pin 9, at least one link 8 has a vertically penetrating mounting hole 8A, and the pipe grabbing mechanism 32 is connected to the straight extension section 7A of the chain 7 via a fixing buckle 21 penetrating the mounting hole 8A. Exemplarily, the fixing buckle 21 may be a screw structure, which passes through the aforementioned mounting hole 8A and is screwed to the pipe grabbing mechanism 32.

[0077] The pipe grasping mechanism 32 further includes a support arm 18 , a lifting arm 23 , a second motor 17 and a cross arm 25 .

[0078] The support arm 18 is fixed to the first slider 19 and extends along the gravity direction DR3, and the support arm 18 has a second guide rail 20 extending along the gravity direction DR3. Figure 7 A moving plate 22 is vertically fixed to the middle of the supporting arm 18 , and the aforementioned first sliding block 19 and the fixing buckle 21 are both mounted on the moving plate 22 . Figure 7 A portion of the support arm 18 is shown, Figure 8 Another portion of the support arm 18 is shown.

[0079] The lifting arm 23 includes a second slider 24 slidably connected to the second guide rail 20, and the lifting arm 23 also extends along the gravity direction DR3. The second motor 17 fixed to the upper end of the support arm 18 is connected to the lifting arm 23 via a motion transmission component (not shown) to drive the lifting arm 23 to rise and fall. Exemplarily, the motion transmission component can be a screw.

[0080] The cross arm 25 is vertically fixed to the lower end of the lifting arm 23 and extends in the first direction DR1, and the two clamping claws 13 are respectively mounted to both ends of the cross arm 25. More specifically, the two cylinders 12 for driving the two clamping claws 13 are respectively fixed to both ends of the cross arm 25, and the clamping claws 13 are mounted to the power output ends of the cylinders 12, so that the clamping claws 13 are mounted to both ends of the cross arm 25 via the cylinders 12.

[0081] See also Fig. 9The clamping jaw 13 includes a first claw body 14 and a second claw body 15 that are opposite to each other in the first direction DR1, and a clamping space 13A that opens downward is defined between the first claw body 14 and the second claw body 15, and the opening is configured to allow the heat exchange tube T to enter the clamping space 13A and to allow the heat exchange tube T to leave the clamping space 13A. The cylinder 12 is configured to drive the first claw body 14 and the second claw body 15 to move away from and approach symmetrically, thereby changing the size of the clamping space 13A. It can be understood that when the cylinder 12 drives the first claw body 14 and the second claw body 15 to move relatively close, the clamping jaw 13 performs a clamping action, and the clamping space 13A becomes smaller. When the cylinder 12 drives the first claw body 14 and the second claw body 15 to move relatively far away, the clamping jaw 13 performs a releasing action, and the clamping space 13A becomes larger.

[0082] In this embodiment, the cross arm 25 is configured as a structure with adjustable length, thereby the interval between the two clamping jaws 13 can be adjusted to better clamp the heat exchange tubes T of different sizes.

[0083] In detail, the cross arm 25 includes a first arm body 26, a second arm body 27, and a third arm body 28 which are separate from each other. The first arm body 26 is fixed to the lower end of the lifting arm 23, and is divided into a first arm segment 26A and a second arm segment 26B arranged in the first direction DR1 by the lower end of the lifting arm 23. The second arm body 27 is connected to the first arm segment 26A in a manner that the position in the first direction DR1 can be adjusted, and the third arm body 28 is connected to the second arm segment 26B in a manner that the position in the first direction DR1 can be adjusted. The second arm body 27 and the third arm body 28 respectively define the aforementioned two ends of the cross arm 25, that is, the two clamping claws 13 are respectively arranged on the second arm body 27 and the third arm body 28.

[0084] More specifically, the second arm 27 and the third arm 28 respectively have an elongated hole 27A and an elongated hole 28A extending along the first direction DR1. Fig. 9 Multiple fastening bolts omitted from the figure are respectively passed through the long holes 27A and the long holes 28A and screwed into the first arm body 26. With the help of the long holes 27A and the long holes 28A, the installation positions of the second arm body 27 and the third arm body 28 on the first arm body 26 can be adjusted, thereby adjusting the length of the cross arm 25 and thereby adjusting the spacing between the two clamps 13.

[0085] Please review Figure 1 In order to ensure the consistency of the displacement pace of the tube grasping mechanisms 32 in each transfer device 31 in the second direction DR2, so that these tube grasping mechanisms 32 can correctly grasp different tube sections of the same heat exchange tube T, the transfer system 33 in this embodiment is constructed as follows: the same motor, that is, the aforementioned first motor 16, is connected to the chain 7 of each transfer device 31 via a synchronous transmission mechanism 29 to drive each chain 7 to move synchronously. The synchronous transmission mechanism 29 is a gear transmission mechanism and includes Figure 1 The first motor 16 drives the transmission shafts 30 to rotate at the same speed via gears not shown in the figure, and then each transmission shaft 30 drives the first sprocket 10 corresponding to the transmission shaft 30 to rotate at the same speed. In other embodiments, the synchronous transmission mechanism 29 can also be a synchronous belt.

[0086] In some embodiments, when each tube grasping mechanism 32 grasps the heat exchange tube T with residual cutting fluid inside, the second motor 17 can be used to make the jaws 13 of different tube grasping mechanisms 32 be at different elevations, thereby tilting the heat exchange tube T so that the cutting fluid in the tube is discharged from the downward inclined end of the tube into the cutting fluid tank under the action of gravity.

Claims

1. A heat exchange tube transfer device, used for transferring a heat exchange tube between a plurality of workstations, wherein the heat exchange tube extends along a first direction, and the plurality of workstations are arranged along a second direction perpendicular to the first direction, characterized in that: The transfer device comprises: a crossbeam, which is erected above the plurality of workstations and extends along the second direction, the crossbeam having a first guide rail extending along the first direction; a chain disposed at the beam, wherein at least a portion of the chain is configured to reciprocate along the second direction; The pipe grasping mechanism comprises a first slider slidably connected to the first guide rail, a plurality of jaws arranged in a spaced relationship along the first direction, and a plurality of cylinders respectively driving the plurality of jaws, wherein the jaws are configured to grasp and release the heat exchange tube, the plurality of cylinders share a same air source, and the pipe grasping mechanism is connected to the chain so as to move back and forth along the second direction under the drive of the chain.

2. The transfer device according to claim 1, characterized in that The chain comprises a plurality of chain links connected to each other via pins, at least one chain link has a mounting hole, and the pipe gripping mechanism is connected to the chain via a fixing buckle penetrating into the mounting hole.

3. The transfer device according to claim 1, characterized in that Also includes: A first sprocket wheel is rotatably disposed at one end of the beam, and the first sprocket wheel is driven to rotate by a first motor; a second sprocket rotatably disposed at the other end of the beam; The chain meshes and connects the first sprocket and the second sprocket in a manner of surrounding the first sprocket and the second sprocket.

4. The transfer device according to claim 3, characterized in that: The rotation axes of the first sprocket and the second sprocket extend in the direction of gravity, and the chain has two straight extensions extending in the second direction between the first sprocket and the second sprocket and spaced apart from each other in the first direction; The crossbeam has a plurality of chain guide grooves extending along the second direction, and the two straight extension sections are respectively arranged in the plurality of chain guide grooves; Wherein, the inner wall of the chain guide groove is formed of polyethylene or nylon.

5. The transfer device according to claim 4, characterized in that The plurality of chain guide grooves are arranged into two guide groove groups spaced apart from each other in the first direction, and each guide groove group includes at least two chain guide grooves spaced apart from each other in sequence in the second direction and collinear with each other.

6. The transfer device according to any one of claims 1 to 5, characterized in that The pipe grasping mechanism comprises: a support arm fixed to the first slider and extending in the direction of gravity, the support arm having a second guide rail extending in the direction of gravity; a lifting arm, comprising a second slider slidably connected to the second guide rail and also extending in the direction of gravity, A second motor connected to the lifting arm to drive the lifting arm to move up and down; a cross arm fixed to the lower end of the lifting arm and extending along the first direction; Wherein, the plurality of clamping claws are mounted on the cross arm.

7. The transfer device according to claim 6, characterized in that The number of the clamping jaws is two, and the two clamping jaws are respectively arranged at two ends of the cross arm.

8. The transfer device according to claim 7, characterized in that The clamping jaw includes a first claw body and a second claw body opposite to each other in the first direction, a downwardly opening clamping space is defined between the first claw body and the second claw body, the opening is configured to allow the heat exchange tube to enter the clamping space and to allow the heat exchange tube to leave the clamping space, and the cylinder is configured to drive the first claw body and the second claw body to move away from and approach symmetrically, thereby changing the size of the clamping space.

9. The transfer device according to claim 8, characterized in that The cross arm comprises: a first arm body, which is fixed to the lower end of the lifting arm and is divided by the lower end of the lifting arm into a first arm segment and a second arm segment arranged in the first direction; a second arm body connected to the first arm segment in a manner that its position in the first direction is adjustable; a third arm body connected to the second arm segment in a manner that its position in the first direction is adjustable; Wherein, the second arm body and the third arm body respectively define the two ends of the cross arm.

10. A heat exchange tube transfer system, characterized in that: include: A plurality of transfer devices according to any one of claims 1 to 9, wherein the plurality of transfer devices are arranged spaced apart along the first direction; A first motor is connected to each chain of the transfer device via a synchronous transmission mechanism to drive each chain to move synchronously.

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