Heat exchange tube penetrating device of straight tube type heat exchanger

Abstract

The invention provides a heat exchange tube penetrating device of a straight tube type heat exchanger. Comprising a tube plate, a baffle plate fixing assembly, a conveying frame and a conveying device, the conveying frame is located on the lifting platform; a lifting frame is detachably mounted on the base, a heat exchange tube bracket is arranged on the fixed plate, slideways are arranged on the fixed plate in parallel, and a movable bracket for bearing is arranged on the slideways; the conveying device comprises a longitudinal adjusting mechanism, a conveying mechanism, a feeding mechanism and a heat exchange tube distance adjusting mechanism. The longitudinal adjusting mechanism is connected with the movable bracket through a nut; the conveying mechanisms are symmetrically assembled on the movable bracket through the positioning bracket and conduct pipe penetrating operation of the two sets of heat exchange pipes at the same time. The pressing wheel pushes the heat exchange tube to the tube penetrating driving wheel, and a torque sensor is arranged below the tube penetrating driving wheel to record the tube penetrating force of the heat exchange tube; the heat exchange tube spacing adjusting mechanism is used for adjusting the distance between the two tube penetrating driving wheels; the feeding mechanisms are symmetrically installed on the movable bracket and push the heat exchange tubes to the two conveying mechanisms at the same time.

Description

Technical Field

[0001] The present invention relates to a heat exchange tube in the field of straight-tube heat exchangers, and particularly to a tube threading device for a heat exchange tube of a straight-tube heat exchanger. Background Art

[0002] A straight-tube heat exchanger generally consists of a shell, tube sheets, heat exchange tubes, tube heads, baffles, etc. The heat exchange tubes are arranged in a straight line, with fluids flowing inside the tubes, and the fluids in the shell exchange heat through the shell wall. The straight-tube heat exchanger achieves heat transfer through the temperature difference between the fluids inside and outside the heat exchange tubes. When the fluid flows inside the heat exchange tube, heat is transferred through the tube wall to the fluid in the shell, thereby achieving the purpose of heating or cooling. Since the heat exchange tubes adopt a straight-tube design, the fluid flow path is short and the pressure drop is small, which is suitable for heat transfer occasions that require rapid heat transfer without pressure loss.

[0003] However, during the process of implementing the technical solutions of the present invention in the embodiments of the present application, the inventors of the present application found that the above technologies have at least the following technical problems: The heat exchange tubes of a straight-tube heat exchanger are usually long and without bending. The heat exchange tubes are inserted into an array of baffles. Currently, the tube threading of the heat exchange tubes of the heat exchanger is all manual, with one person guiding and one person pushing the tube. Since the length of the heat exchange tube is not a fixed value, the overly long heat exchange tube will bend radially, and then when threading the tube, the heat exchange tube will be non-concentric with the mounting holes on the baffle. When the eccentricity is slight, the thrust increases, and when it is severe, the heat exchange tube cannot pass through the baffle. Moreover, forcing it to penetrate will cause damage to the heat exchange tube and reduce the service life of the equipment. And there is no data record. When replacing the heat exchange tube, it can only be judged by eyesight, increasing the error rate. Summary of the Invention

[0004] In order to solve the deficiencies existing in the prior art, aiming at the problems of threading and assembling the heat exchange tube concentrically with the mounting holes on the array of baffles and recording the thrust data of the heat exchange tube threading to predict damage, the embodiments of the present application provide a tube threading device for a heat exchange tube of a straight-tube heat exchanger. The tube threading device for the heat exchange tube ensures that the heat exchange tube holes are in a concentric position through the same reference positioning of the baffle; and a conveying device is arranged on the conveying frame to adjust the position of the heat exchange tube so that it corresponds to the position of the heat exchange tube holes on the baffle, meeting the requirement of uniform force when threading two heat exchange tubes, and solving the technical problem of concentric tube threading of the heat exchange tube.

[0005] The solutions adopted by the embodiments of the present application to solve the technical problems are as follows: A tube threading device for a heat exchange tube of a straight-tube heat exchanger includes a tube sheet, a baffle fixing component, a conveying frame, and a conveying device; The tube sheet is arrayed with heat exchange tube holes for assembling heat exchange tubes; the baffle plate fixing assembly includes a fixing groove, a moving seat, a baffle plate and a spacer tube; the baffle plate is located on the moving seat and is detachably arranged in the two fixing grooves. The baffle plate is also arrayed with heat exchange tube holes, and the baffle plates are connected and fixed by spacer tubes; the conveying frame is arranged at one end of the baffle plate fixing assembly and is located on the lifting platform; the conveying frame includes a base, a lifting frame, a fixing plate and a heat exchange tube bracket; the lifting frame is detachably installed on the base, the base is provided with a fixing plate, the fixing plate is provided with a heat exchange tube bracket, the fixing plate is arranged with parallel slideways, and a moving bracket for bearing is arranged on the slideways; the conveying device is installed on the moving bracket and includes a longitudinal adjustment mechanism, a conveying mechanism, a feeding mechanism and a heat exchange tube spacing adjustment mechanism; the longitudinal adjustment mechanism is installed in the middle of the fixing plate and is vertically staggered with the baffle plate. A lead nut is arranged in the longitudinal adjustment mechanism and is connected to the moving bracket through the lead nut; the conveying mechanism is symmetrically assembled on the moving bracket through a positioning bracket, and the heat exchange tube is pushed to the tube-passing driving wheel through a pressing wheel. A torque sensor is arranged below the tube-passing driving wheel to record the tube-passing force of the heat exchange tube; the heat exchange tube spacing adjustment mechanism is installed at one end of the positioning bracket and is used to adjust the distance between the two tube-passing driving wheels and perform the tube-passing operation of two heat exchange tubes at the same time; the feeding mechanism is symmetrically installed in the middle of the moving bracket and pushes the heat exchange tubes 110 to the two conveying mechanisms at the same time; Among them, the two conveying mechanisms are installed in the conveying frame, and the tube-passing driving wheel adjusts the position in the Z-axis direction through the lifting platform; the tube-passing driving wheel adjusts the position in the Y-axis direction through the longitudinal adjustment mechanism; the other tube-passing driving wheel adjusts the position in the Y-axis direction through the heat exchange tube spacing adjustment mechanism, and performs the tube-passing operation of two heat exchange tubes at the same time; the torque sensor records the matching relationship between each heat exchange tube and the heat exchange tube hole of the baffle plate.

[0006] In order to further solve the technical problems to be solved by the embodiments of the present application, in the longitudinal adjustment mechanism provided by the embodiments of the present application, the longitudinal adjustment mechanism includes a first servo motor, a first lead screw, a bearing seat and a lead nut; Both ends of the first lead screw are installed with bearing seats with bearings, and the bearing seats are located in the middle of the fixing plate to support the first lead screw; a first servo motor is arranged at the extending end of the first lead screw supported, and the first servo motor drives the first lead screw to rotate; the lead nut is screwed to the first lead screw. When the first lead screw rotates, the lead nut translates along the axial direction of the first lead screw and drives the moving bracket to slide, so as to perform the radial adjustment of the conveying device.

[0007] Further, the feeding mechanism includes a chassis, the lower part of which is connected to the middle part of the moving bracket and moves along with it; symmetrically arranged on the chassis are second reduction motors, the output ends of which are equipped with driving sprockets. The driving sprockets are connected to driven sprockets through chains, and the driven sprockets are installed in the middle of the transmission shaft. Thrust plates are installed at both ends of the transmission shaft, and the thrust plates rotate along with the transmission shaft. Thrust blocks are arranged on the thrust plates for pushing the heat exchange tubes for feeding and tube threading operations.

[0008] Furthermore, the thrust plate is a wheel-shaped structure sleeved on the transmission shaft, and thrust blocks are circumferentially arrayed on the outer circumference of the thrust plate. The thrust blocks push the heat exchange tubes to the tube threading driving wheel.

[0009] Furthermore, the conveying mechanism includes a positioning bracket, the lower part of which is connected to both ends of the moving bracket and moves along with it; at one end of the positioning bracket is arranged a first reduction motor, and the output end of the first reduction motor is provided with a tube threading driving wheel for extruding the heat exchange tubes for tube threading operations; a torque sensor is arranged below the tube threading driving wheel for monitoring and recording the force of tube threading; at the collinear position of the tube threading driving wheel is arranged a pressure wheel, and the pressure wheel extends towards the tube threading driving wheel through a cylinder for pressing the heat exchange tubes against the tube threading driving wheel; a guiding frame is arranged on the side of the pressure wheel for receiving the heat exchange tubes pushed by the feeding mechanism.

[0010] Furthermore, the heat exchange tube spacing adjusting mechanism is arranged at the other end of the positioning bracket for adjusting the position of another tube threading driving wheel in the Y-axis direction; the heat exchange tube spacing adjusting mechanism includes a second servo motor, a second lead screw, a slider and a sliding seat; The sliding seat is installed at the other end of the positioning bracket, and a slider is assembled on the sliding seat. The second lead screw is screwed with the slider and is connected to the positioning bracket through a support seat. The outer end of the second lead screw is provided with a second servo motor. When the second servo motor drives the second lead screw to rotate, the slider translates along the axial direction of the second lead screw, thereby adjusting the distance between the two tube threading driving wheels; among them, a first reduction motor is arranged on the upper part of the slider, and the output end of the first reduction motor is provided with a tube threading driving wheel; a torque sensor is arranged below the tube threading driving wheel, and a pressure wheel is arranged at the collinear position of the tube threading driving wheel. The pressure wheel extends towards the tube threading driving wheel through a cylinder to press the heat exchange tubes against the tube threading driving wheel; a guiding frame is arranged on the side of the pressure wheel for receiving the heat exchange tubes pushed by the feeding mechanism.

[0011] Positive effects: The technical solution provided in the embodiment of the present application has at least the following technical effects or advantages: 1. Since the embodiment of the present application adopts the technical means that the conveying frame is located on the lifting platform, the conveying device can adjust the height in the Z-axis direction, and the heat exchange tubes pushed by the pipe-passing driving wheels are at the same height as the heat exchange tube holes; the longitudinal adjustment mechanism adjusts the position of the pipe-passing driving wheels in the Y-axis direction so that one heat exchange tube is concentric with the heat exchange tube hole; at the same time, the heat exchange tube spacing adjustment mechanism adjusts the position of the other pipe-passing driving wheel in the Y-axis direction so that the other heat exchange tube is aligned with the heat exchange tube hole of the baffle plate, effectively solving the technical problem of concentric pipe-passing of heat exchange tubes in the prior art, meeting the spacing requirements between the two heat exchange tubes, the two heat exchange tubes are concentric with the heat exchange tube holes of the baffle plate, the force during pipe-passing is the same, and the pipe-passing operation of the two heat exchange tubes is carried out simultaneously, improving the working efficiency of assembling the heat exchange tubes of the straight-tube heat exchanger, and further achieving the technical effect of uniform pipe-passing force of the heat exchange tubes of the straight-tube heat exchanger.

[0012] 2. Since the embodiment of the present application adopts the technical means that a torque sensor is arranged below the pipe-passing driving wheel, the pipe-passing force between each heat exchange tube and the heat exchange tube hole of the baffle plate is recorded by the torque sensor, effectively solving the technical problem of predicting and repairing damaged heat exchange tubes in the prior art, judging the possibly damaged heat exchange tubes, thereby predicting the position for replacing the heat exchange tubes, and improving the maintenance efficiency of the heat exchanger. Further achieving the technical effect of uniform pipe-passing force of the heat exchange tubes of the straight-tube heat exchanger.

[0013] It is suitable to be used as a pipe-passing device for the heat exchange tubes of a straight-tube heat exchanger. Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is the southwestern isometric view of this embodiment; Figure 2 It is the southeastern isometric view of the tube sheet and baffle plate fixing assembly of this embodiment; Figure 3 It is the southwestern isometric view of the conveying frame and the conveying device of this embodiment; Figure 4 It is the northwestern isometric view of the conveying frame and the conveying device after removing the disassembly and hoisting rack of this embodiment; Figure 5 It is the southeastern isometric view of the conveying frame and the conveying device after removing the disassembly and hoisting rack and the material rack of this embodiment; Figure 6 It is the northeastern isometric view of the conveying frame and the conveying device after removing the disassembly and hoisting rack and the material rack of this embodiment; Figure 7 Isometric view of the feeding mechanism of this embodiment from the southwest direction; Figure 8 Isometric view of the conveying mechanism of this embodiment from the southwest direction; Figure 9 Front view of the conveying frame and the conveying device after removing the disassembly and hoisting rack and the material rack of this embodiment; Figure 10 Side view of the conveying frame and the conveying device after removing the disassembly and hoisting rack and the material rack of this embodiment; Figure 11 Top view of the conveying frame and the conveying device after removing the disassembly and hoisting rack and the material rack of this embodiment; Figure 12 A - A sectional view of this embodiment; Figure 13 B - B sectional view of this embodiment; Figure 14 C - C sectional view of this embodiment; Figure 15 D - D sectional view of this embodiment.

[0016] In the figure: 100. Tube sheet, 110. Heat exchange tube, 111. Heat exchange tube hole; 200. Baffle fixing assembly; 210. Fixed groove, 211. Rectangular tube, 212. Top plate, 213. Bolt, 214. Bottom plate, 215. Pulley; 220. Moving seat, 221. Two - wing baffle moving seat, 222. Central baffle moving seat; 230. Baffle, 231. Integral baffle, 232. Central baffle, 233. Two - wing baffle; 240. Spacing tube, 241. Two - wing baffle spacing tube, 242. Intermediate baffle spacing tube; 300. Conveying frame, 310. Base, 320. Hoisting rack, 330. Fixed plate, 331. Slideway, 332. Moving bracket; 340. Heat exchange tube bracket, 400. Conveying device, 410. Longitudinal adjustment mechanism, 411. First servo motor, 412. First lead screw, 413. Bearing seat, 414. Nut; 420. Conveying mechanism, 421. First reduction motor, 422. Pipe threading driving wheel, 423. Torque sensor, 424. Cylinder, 425. Pressing wheel, 426. Guide frame, 427. Positioning bracket; 430. Loading mechanism, 431. Chassis, 432. Second reduction motor, 433. Driving sprocket, 434. Chain, 435. Driven sprocket, 436. Transmission shaft, 437. Pushing plate, 438. Pushing block; 440. Heat exchange tube spacing adjustment mechanism, 441. Second servo motor, 442. Second lead screw, 443. Slide block, 444. Slide seat. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0019] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0020] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0021] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0022] In the description of the embodiments of this application, the term "a plurality of" means more than two (including two). Similarly, "A plurality of groups" means more than two groups (including two groups), and "a plurality of pieces" means more than two pieces (including two pieces).

[0023] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of this application.

[0024] In the description of the embodiments of this application, unless otherwise clearly specified and limited, the technical term "installation" Terms such as "connected", "joined", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0025] By providing a tube threading device for heat exchange tubes of a straight tube heat exchanger in the embodiments of the present application, the problem in the prior art of the straight tube heat exchanger that it is easy to be unable to control the tube threading force when assembling the heat exchange tubes 110 on the baffle 230 is solved. In the tube threading of the heat exchange tubes 110, the conveying device 400 is used to adjust the tube threading driving wheel 422, realizing the adjustment of the three-dimensional position of the heat exchange tubes 110, recording the matching relationship between each heat exchange tube 110 and the baffle 230, determining the service life of the heat exchange tubes 110, predicting the positions for replacing the heat exchange tubes 110, ensuring the accuracy of later maintenance, and meeting the requirements of the tube threading assembly process of the straight tube heat exchanger.

[0026] According to Figures 1-15 As shown, a tube threading device for heat exchange tubes of a straight tube heat exchanger includes a tube sheet 100, a baffle fixing assembly 200, a conveying frame 300, and a conveying device 400; The tube sheet 100 is provided with heat exchange tube holes 111 in an array for assembling the heat exchange tubes 110. A tube threading guide head is installed at the front end of the heat exchange tubes 110 to facilitate the heat exchange tubes 110 to penetrate and pass through the heat exchange tube holes 111. The baffle fixing assembly 200 is arranged on one side of the tube sheet 100 and includes a fixing groove 210, a moving seat 220, a baffle 230, and a spacing tube 240; the baffle 230 is located on the moving seat 220 and is detachably arranged in the two fixing grooves 210. The baffle 230 can be positioned with the same reference. The baffle 230 is also provided with heat exchange tube holes 111 in an array. The baffles 230 are connected and fixed by the spacing tube 240. The centers of the tube sheet 100 and the baffle 230 are collinear, so that the heat exchange tube holes 111 are in a concentric position. The conveying frame 300 is arranged at one end of the baffle fixing assembly 200 and is located on the lifting platform. It can adjust the height for Z-axis direction limiting, so that the heat exchange tubes 110 are adapted to the heat exchange tube holes 111 on the baffle 230. Furthermore, the heat exchange tubes 110 and the heat exchange tube holes 111 of the baffle 230 are concentric, so that the force is uniform during tube threading operation; the conveying frame 300 includes a base 310, a lifting frame 320, a fixing plate 330 and a heat exchange tube bracket 340; the lifting frame 320 is detachably installed on the base 310, and the lifting frame 320 is used to move the conveying frame 300 to the lifting platform. After the lifting frame 320 is disassembled, the tube threading operation is carried out; a fixing plate 330 is arranged on the base 310, and a heat exchange tube bracket 340 is arranged on the fixing plate 330 for placing the heat exchange tubes 110 for stock preparation. A grid structure is provided between the fixing plate 330 and the base 310 to enhance the planar stability of the fixing plate 330; slide ways 331 are arranged in parallel on the fixing plate 330, and a moving bracket 332 for bearing is arranged on the slide ways 331; The conveying device 400 is installed on the moving bracket 332 and includes a longitudinal adjustment mechanism 410, a conveying mechanism 420, a feeding mechanism 430 and a heat exchange tube spacing adjustment mechanism 440; The longitudinal adjustment mechanism 410 is installed in the middle of the fixing plate 330 and is vertically staggered with the baffle 230. A lead nut 414 is arranged in the longitudinal adjustment mechanism 410 and is connected to the moving bracket 332 through the lead nut 414; it is used to adjust the position of the conveying device 400 in the Y-axis direction, so that the heat exchange tubes 110 to be threaded are aligned with the heat exchange tube holes 111 of the baffle 230, realizing the co-linearity of the heat exchange tubes 110 and the heat exchange tube holes 111, reducing the resistance during tube threading, and further making the force uniform during tube threading; The conveying mechanism 420 is symmetrically assembled on the moving bracket 332 through a positioning bracket 427 to carry out the tube threading operation of two groups of heat exchange tubes 110 at the same time; the heat exchange tubes 110 are pushed to the tube threading driving wheel 422 through the pressing wheels 425. Furthermore, the tube threading driving wheel 422 and the pressing wheels 425 squeeze the heat exchange tubes 110 and sequentially penetrate through the heat exchange tube holes 111 of the baffle 230, thus realizing the tube threading operation of the heat exchange tubes 110; a torque sensor 423 is arranged below the tube threading driving wheel 422 to record the tube threading force of the heat exchange tubes 110 and record the matching relationship between each heat exchange tube 110 and the baffle 230 to ensure the accuracy of later maintenance; The heat exchange tube spacing adjustment mechanism 440 is installed at one end of the positioning bracket 427 and is used to adjust one conveying mechanism 420. Furthermore, the distance between the two tube threading driving wheels 422 can be adjusted, so as to adjust the distance between the two heat exchange tubes 110 to make it match the heat exchange tube holes 111 of the baffle 230, and the tube threading operation of two heat exchange tubes 110 can be carried out at the same time; The feeding mechanism 430 is symmetrically installed in the middle of the moving bracket 332 and pushes the heat exchange tubes 110 to the two conveying mechanisms 420 at the same time; Among them, two conveying mechanisms 420 are installed in the conveying frame 300. The pipe-passing driving wheel 422 adjusts its position in the Z-axis direction through the lifting platform, so that the heat exchange pipe 110 is at the same height as the heat exchange pipe hole 111 of the baffle plate 230; the longitudinal adjustment mechanism 410 adjusts the position of the pipe-passing driving wheel 422 in the Y-axis direction, so that the center of one heat exchange pipe 110 is collinear with the heat exchange pipe hole 111 of the baffle plate 230; the heat exchange pipe spacing adjustment mechanism 440 adjusts the position of the other pipe-passing driving wheel 422 in the Y-axis direction, so that the other heat exchange pipe 110 is aligned with the heat exchange pipe hole 111 of the baffle plate 230, meeting the spacing requirement between the two heat exchange pipes 110, and at the same time performing the pipe-passing operation of the two heat exchange pipes 110; the torque sensor 423 records the matching relationship between each heat exchange pipe 110 and the heat exchange pipe hole 111 of the baffle plate 230, predicts the position of replacing the heat exchange pipe 110, and improves the maintenance efficiency of the heat exchanger.

[0027] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages: Since the conveying frame 300 is located on the lifting platform, the conveying device can adjust the height in the Z-axis direction. Furthermore, the heat exchange pipe 110 pushed by the pipe-passing driving wheel 422 is at the same height as the heat exchange pipe hole 111 of the baffle plate 230; the longitudinal adjustment mechanism 410 adjusts the position of the pipe-passing driving wheel 422 in the Y-axis direction, so that the center of one heat exchange pipe 110 is concentric with the heat exchange pipe hole 111 of the baffle plate 230; at the same time, the heat exchange pipe spacing adjustment mechanism 440 adjusts the position of the other pipe-passing driving wheel 422 in the Y-axis direction, so that the other heat exchange pipe 110 is aligned with the heat exchange pipe hole 111 of the baffle plate 230, meeting the spacing requirement between the two heat exchange pipes 110. Thus, the two heat exchange pipes 110 and the heat exchange pipe holes 111 of the baffle plate 230 are concentric, the force during pipe-passing is the same, and the pipe-passing operation of the two heat exchange pipes 110 is carried out at the same time, improving the working efficiency of assembling the heat exchange pipes of the straight-tube heat exchanger.

[0028] Since a torque sensor 423 is provided below the pipe-passing driving wheel 422, the pipe-passing force between each heat exchange pipe 110 and the heat exchange pipe hole 111 of the baffle plate 230 is recorded by the torque sensor 423, and then the heat exchange pipe 110 that may be damaged is judged, thereby predicting the position of replacing the heat exchange pipe 110 and improving the maintenance efficiency of the heat exchanger.

[0029] To ensure the stability of the structure of this embodiment, the fixing groove 210 is a U-shaped long strip structure, including a rectangular pipe 211, a top plate 212, a bolt 213, a bottom plate 214 and a pulley 215; A top plate 212 is provided at the upper part of the rectangular pipe 211, and a bottom plate 214 is provided at the lower part; the top plate 212, the bottom plate 214 and the rectangular pipe 211 are closed to form a U-shaped structure with one side open, and pulleys 215 for supporting the moving seat 220 are assembled in the U-shape, and the baffle plate 230 is positioned between the two fixing grooves 210 and locked and fixed by bolts 213.

[0030] As a conventional technical option, the baffle plate 230 includes an integral baffle plate 231, a central baffle plate 232 and two-wing baffle plates 233; the integral baffle plate 231 is an integral and complete baffle plate and is arranged in the middle of the fixing groove 210; the central baffle plate 232 is an integral partial baffle plate and is arranged on both sides of the integral baffle plate 231; the two-wing baffle plates 233 are split partial baffle plates and are arranged between the central baffle plates 232, so that the heat exchange tubes 110 are alternately sleeved in the heat exchange tube holes 111 of the baffle plate 230, reducing the contact between the heat exchange tubes 110 and the heat exchange tube holes 111, and further being able to reduce the resistance of tube threading, thereby ensuring that the tube threading force is consistent and avoiding damaging the heat exchange tubes 110.

[0031] As a conventional technical option, the upper part of the moving seat 220 is assembled with the baffle plate 230, and the lower part is connected to the pulleys 215 at both ends, so that there is the same reference between the baffle plates 230; it includes a two-wing baffle plate moving seat 221 and a central baffle plate moving seat 222; the central baffle plate moving seat 222 is used to carry the integral baffle plate 231 and the central baffle plate 232, and the two-wing baffle plate moving seat 221 is used to carry the two-wing baffle plates 233.

[0032] As a conventional technical option, one end of the fixed-distance pipe 240 is connected to the tube sheet 100, and the other end is sequentially connected to the baffle plate 230; it includes a two-wing baffle plate fixed-distance pipe 241 and an intermediate baffle plate fixed-distance pipe 242; the intermediate baffle plate fixed-distance pipe 242 is used to connect the integral baffle plate 231 and the central baffle plate 232, and the two-wing baffle plate fixed-distance pipe 241 is used to connect the integral baffle plate 231 and the two-wing baffle plates 233; the tube sheet 100 and the baffle plate 230 are detachably connected and fixed.

[0033] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages: Since the baffle plate 230 includes an integral baffle plate 231, a central baffle plate 232 and two-wing baffle plates 233, the integral baffle plate 231 is arranged in the middle of the fixing groove 210, the central baffle plate 232 is arranged on both sides of the integral baffle plate 231, and the two-wing baffle plates 233 are arranged between the central baffle plates 232, therefore, the heat exchange tubes 110 are alternately sleeved in the heat exchange tube holes 111, and further reduce the contact between the heat exchange tubes 110 and the heat exchange tube holes 111, thereby being able to reduce the resistance of tube threading and ensuring that the tube threading force is consistent.

[0034] To further ensure the stability of the structure of this embodiment, the longitudinal adjustment mechanism 410 includes a first servo motor 411, a first lead screw 412, a bearing block 413, and a nut 414; Both ends of the first lead screw 412 are equipped with bearing blocks 413 with bearings. The bearing blocks 413 are located in the middle of the fixed plate 330 to support the first lead screw 412. A first servo motor 411 is provided at the extended support end of the first lead screw 412, and the first servo motor 411 drives the first lead screw 412 to rotate. The nut 414 is screwed onto the first lead screw 412. When the first lead screw 412 rotates, the nut 414 translates along the axial direction of the first lead screw 412 and drives the moving bracket 332 to slide, performing radial adjustment of the conveying device 400.

[0035] To optimize the structure of this embodiment, the feeding mechanism 430 includes a chassis 431. The chassis 431 is a frame structure and is connected to the middle of the moving bracket 332 at the lower part and moves with it. Second reduction motors 432 are symmetrically arranged on the chassis 431. The output ends of the second reduction motors 432 are equipped with driving sprockets 433. The driving sprockets 433 are connected to driven sprockets 435 through chains 434. The driven sprockets 435 are installed in the middle of the transmission shaft 436. Pushing plates 437 are installed at both ends of the transmission shaft 436. The pushing plates 437 rotate with the transmission shaft 436. Pushing blocks 438 are provided on the pushing plates 437 for pushing the heat exchange tubes 110 for tube threading operation.

[0036] In this embodiment, the pushing plate 437 is a wheel-shaped structure sleeved on the transmission shaft 436. Pushing blocks 438 are circumferentially arranged on the outer circumference of the pushing plate 437, and the pushing blocks 438 push the heat exchange tubes 110 to the tube threading driving wheel 422.

[0037] To further optimize the structure of this embodiment, the conveying mechanism 420 includes a positioning bracket 427. The lower part of the positioning bracket 427 is connected to both ends of the moving bracket 332 and moves with it. A first reduction motor 421 is provided at one end of the positioning bracket 427. The output end of the first reduction motor 421 is provided with a tube threading driving wheel 422 for extruding the heat exchange tubes 110 for tube threading operation. A torque sensor 423 is provided below the tube threading driving wheel 422 for monitoring and recording the force during tube threading, thereby judging the possibly damaged heat exchange tubes 110, predicting the positions for replacing the heat exchange tubes 110, and improving the maintenance efficiency of the heat exchanger. A pressure wheel 425 is provided at the collinear position of the tube threading driving wheel 422. The pressure wheel 425 extends towards the tube threading driving wheel 422 through a cylinder 424 for pressing the heat exchange tubes 110 against the tube threading driving wheel 422. Then, the tube threading driving wheel 422 conveys the heat exchange tubes 110 to the baffle 230 for tube threading operation. A guiding frame 426 is provided on the side of the pressure wheel 425 for receiving the heat exchange tubes 110 pushed by the feeding mechanism 430.

[0038] To further optimize the structure of this embodiment, the heat exchange tube spacing adjustment mechanism 440 is arranged at the other end of the positioning bracket 427 and is used to adjust the position of the other tube-passing driving wheel 422 in the Y-axis direction, so that another heat exchange tube 110 is aligned with the heat exchange tube hole 111 of the baffle plate 230 at the same time, meeting the spacing requirements between the two heat exchange tubes 110. Thus, the two heat exchange tubes 110 and the heat exchange tube holes 111 of the baffle plate 230 are concentric, and when passing the tubes, the forces are consistent, and the tube-passing operation of the two heat exchange tubes 110 is carried out simultaneously, improving the working efficiency of assembling the heat exchange tubes of the straight-tube heat exchanger; the heat exchange tube spacing adjustment mechanism 440 includes a second servo motor 441, a second lead screw 442, a slider 443 and a slide seat 444; The slide seat 444 is installed at the other end of the positioning bracket 427. A slider 443 is assembled on the slide seat 444. The second lead screw 442 is screwed with the slider 443 and is connected to the positioning bracket 427 through a support seat. A second servo motor 441 is arranged at the outer end of the second lead screw 442. When the second servo motor 441 drives the second lead screw 442 to rotate, the slider 443 translates along the axial direction of the second lead screw 442, thereby adjusting the distance between the two tube-passing driving wheels 422; among them, a first reduction motor 421 is arranged on the upper part of the slider 443, and a tube-passing driving wheel 422 is arranged at the output end of the first reduction motor 421; a torque sensor 423 is arranged below the tube-passing driving wheel 422, and a pressure wheel 425 is arranged at the collinear position of the tube-passing driving wheel 422. The pressure wheel 425 extends towards the tube-passing driving wheel 422 through a cylinder 424, pressing the heat exchange tube 110 against the tube-passing driving wheel 422; a guiding frame 426 is arranged on the side of the pressure wheel 425 for receiving the heat exchange tubes 110 pushed by the feeding mechanism 430.

[0039] Preferably, the lifting frame 320 is a lower open-frame structure. Column legs are provided at the lower part of the lifting frame 320, and corresponding column seats are provided on the base 310. The column legs and the column seats are detachably connected through bolt assemblies; lifting lugs are arranged at the upper part of the lifting frame 320 for lifting and transporting the conveying frame 300 and the conveying device 400.

[0040] The heat exchange tube bracket 340 is a saddle-shaped frame structure, and seat plates are provided around the bottom. The heat exchange tube bracket 340 is detachably connected to the fixing plate 330 through bolt assemblies.

[0041] The working process of this embodiment: It includes the following steps: A. Fix the fixing groove 210 of the baffle plate 230 and the tube sheet 100, move the moving seat 220 of the baffle plate 230, place the baffle plate 230 and the spacer tube 240 in sequence, and fix them with tie rods, and lock the moving seat 220 of the baffle plate 230 on the fixing groove 210; B. Install the longitudinal adjustment mechanism 410; C. Lift and convey the frame 300 and the conveying device 400 to the lifting platform, and remove the lifting frame 320; D. Install the heat exchange tube bracket 340; E. First, adjust the lifting platform to a suitable height, second, adjust the longitudinal adjustment mechanism 410, and finally adjust the heat exchange tube spacing adjustment mechanism 440 so that the distance between the two pipe-passing driving wheels 422 matches the distance between the two heat exchange tubes 110; F. Manually load the heat exchange tubes 110 onto the heat exchange tube bracket 340 and set the torque value of the torque sensor 423; G. Start the feeding mechanism 430. When the first heat exchange tube 110 reaches the designated position, the proximity switch is activated and the feeding mechanism 430 stops. The cylinder 424 in the conveying device 400 acts to push the heat exchange tube 100 to the pipe-passing driving wheel 422 and press it tightly. Start the first reduction motor 421, and the pipe-passing driving wheel 422 drives the heat exchange tube 110 to move forward. When the torque value of the torque sensor 423 exceeds the set value, an alarm is given and the value and the position information of the heat exchange tube 110 are recorded, all of which are recorded by the computer. When the heat exchange tube 110 disengages from the pipe-passing driving wheel 422 and reaches the predetermined position, the first reduction motor 421 stops operating. Adjust the longitudinal adjustment mechanism 410 to reach the designated position of the next group of heat exchange tubes 110. The signal is fed back to the feeding mechanism 430 and it is activated, and repeat the operation in step G; H. Until all the heat exchange tubes 110 in this row are completely passed through the pipes; I. Adjust the height of the lifting platform to the height where the next row of heat exchange tubes 110 is located, and repeat the operations in steps G, H, and I until all the heat exchange tubes 110 are completely passed through the pipes; J. Remove the heat exchange tube bracket 340, install the lifting frame 320, lift the mobile conveying frame 300 and the conveying device 400 to a safe location, and complete the subsequent pipe-passing operations.

[0042] It should be noted that the content not described in detail in the specification belongs to the prior art well-known to those skilled in the art, and the model parameters of the first servo motor 411, the first reduction motor 421, the second reduction motor 432, and the second servo motor 441 are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described herein.

[0043] The description of the present invention is given for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention so as to design various embodiments with various modifications suitable for a particular purpose.

[0044] Finally, it should be noted that: The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchange tube threading device for a straight tube heat exchanger, characterized in that: It comprises a tube sheet (100), a baffle fixing assembly (200), a conveying frame (300) and a conveying device (400); The tube sheet (100) is provided with an array of heat exchange tube holes (111) for mounting heat exchange tubes (110); The baffle fixing assembly (200) comprises a fixing groove (210), a movable seat (220), a baffle (230) and a fixed-length tube (240); the baffle (230) is located on the movable seat (220) and is detachably arranged in two fixing grooves (210); heat exchange tube holes (111) are also arranged in an array on the baffle (230); and the baffles (230) are connected and fixed by the fixed-length tube (240); The conveying frame (300) is arranged at one end of the baffle fixing assembly (200) and is located on the lifting platform; the conveying frame (300) comprises a base (310), a hanging frame (320), a fixing plate (330) and a heat exchange tube bracket (340); the hanging frame (320) is detachably mounted on the base (310), the fixing plate (330) is arranged on the base (310), the heat exchange tube bracket (340) is arranged on the fixing plate (330), slideways (331) are arranged in parallel on the fixing plate (330), and a movable bracket (332) for bearing is arranged on the slideways (331); The conveying device (400) is installed on the movable bracket (332), and comprises a longitudinal adjustment mechanism (410), a conveying mechanism (420), a loading mechanism (430), and a heat exchange tube spacing adjustment mechanism (440); The longitudinal adjustment mechanism (410) is installed in the middle of the fixed plate (330) and is vertically staggered with the baffle plate (230). A nut (414) is provided in the longitudinal adjustment mechanism (410) and is connected to the movable bracket (332) via the nut (414). The conveying mechanism (420) is symmetrically assembled on the movable bracket (332) via a positioning bracket (427); the heat exchange tube (110) is pushed to the tube-threading driving wheel (422) via a pressing wheel (425); a torque sensor (423) is provided below the tube-threading driving wheel (422) to record the tube-threading force of the heat exchange tube (110); The heat exchange tube spacing adjustment mechanism (440) is installed at one end of the positioning bracket (427) and is used to adjust the distance between the two tube threading driving wheels (422) and to perform tube threading operations on two heat exchange tubes (110) at the same time; The feeding mechanism (430) is symmetrically mounted in the middle of the movable bracket (332) and simultaneously pushes the heat exchange tubes (110) for the two conveying mechanisms (420); Among them, two conveying mechanisms (420) are installed in the conveying frame (300). The pipe-passing driving wheel (422) adjusts its position in the Z-axis direction through a lifting platform; the position of the pipe-passing driving wheel (422) in the Y-axis direction is adjusted through a longitudinal adjustment mechanism (410); the position of the other pipe-passing driving wheel (422) in the Y-axis direction is adjusted through a heat exchange tube spacing adjustment mechanism (440), and at the same time, the pipe-passing operation of two heat exchange tubes (110) is carried out; the cooperation relationship between each heat exchange tube (110) and the heat exchange tube hole (111) of the baffle (230) is recorded through a torque sensor (423).

2. The heat exchange tube pipe-passing device for a straight tube heat exchanger according to claim 1, characterized in that: The fixed groove (210) includes a rectangular tube (211), a top plate (212), bolts (213), a bottom plate (214) and pulleys (215); A top plate (212) is arranged on the upper part of the rectangular tube (211), and a bottom plate (214) is arranged on the lower part; the top plate (212), the bottom plate (214) and the rectangular tube (211) are closed to form a U-shaped structure with one side open, and pulleys (215) for supporting the moving seat (220) are assembled in the U-shape. The baffle (230) is positioned between the two fixed grooves (210) and is locked and fixed through bolts (213).

3. The heat exchange tube pipe-passing device for a straight tube heat exchanger according to claim 2, characterized in that: The baffle (230) includes an integral baffle (231), a central baffle (232) and two-wing baffles (233); The integral baffle (231) is an integral and complete baffle, which is arranged in the middle of the fixed groove (210); the central baffle (232) is an integral partial baffle, which is arranged on both sides of the integral baffle (231); the two-wing baffles (233) are split partial baffles, which are arranged between the central baffles (232).

4. The heat exchange tube pipe-passing device for a straight tube heat exchanger according to claim 3, characterized in that: The upper part of the moving seat (220) is assembled with a baffle (230), and the lower part is connected to pulleys (215) at both ends; it includes a two-wing baffle moving seat (221) and a central baffle moving seat (222); the central baffle moving seat (222) is used to carry the integral baffle (231) and the central baffle (232), and the two-wing baffle moving seat (221) is used to carry the two-wing baffles (233).

5. The heat exchange tube pipe-passing device for a straight tube heat exchanger according to claim 3, characterized in that: One end of the fixed-distance tube (240) is connected to the tube sheet (100), and the other end is successively connected to the baffle (230); it includes a two-wing baffle fixed-distance tube (241) and an intermediate baffle fixed-distance tube (242); the intermediate baffle fixed-distance tube (242) is used to connect the integral baffle (231) and the central baffle (232), and the two-wing baffle fixed-distance tube (241) is used to connect the integral baffle (231) and the two-wing baffles (233).

6. The heat exchange tube pipe-passing device for a straight tube heat exchanger according to claim 1, characterized in that: The longitudinal adjustment mechanism (410) comprises a first servo motor (411), a first lead screw (412), a bearing seat (413) and a nut (414); Bearing seats (413) with bearings are installed at both ends of the first lead screw (412), and the bearing seats (413) are located in the middle of the fixed plate (330) to support the first lead screw (412); a first servo motor (411) is arranged at the supporting extension end of the first lead screw (412), and the first servo motor (411) drives the first lead screw (412) to rotate; the nut (414) is threadedly connected to the first lead screw (412), and when the first lead screw (412) rotates, the nut (414) translates axially along the first lead screw (412), and drives the movable bracket (332) to slide, so as to perform radial adjustment of the conveying device (400).

7. The heat exchange tube threading device of a straight tube heat exchanger according to claim 6, characterized in that: The feeding mechanism (430) comprises a chassis (431), the lower part of which is connected to the middle part of the movable bracket (332) and moves with it; a second reduction motor (432) is symmetrically arranged on the chassis (431), a driving sprocket (433) is installed at the output end of the second reduction motor (432), the driving sprocket (433) is connected to a driven sprocket (435) via a chain (434), the driven sprocket (435) is installed in the middle part of the transmission shaft (436), and push plates (437) are installed at both ends of the transmission shaft (436), the push plates (437) rotate with the transmission shaft (436), and a push block (438) is arranged on the push plate (437) for pushing the heat exchange tube (110) for feeding and performing a tube threading operation.

8. The heat exchange tube threading device of a straight tube heat exchanger according to claim 7, characterized in that: The push plate (437) is a wheel-shaped structure sleeved on the transmission shaft (436), and push blocks (438) are arranged in a circumferential array on the outer circumference of the push plate (437). The push blocks (438) push the heat exchange tube (110) to the tube threading driving wheel (422).

9. The heat exchange tube threading device of a straight tube heat exchanger according to claim 6, characterized in that: The conveying mechanism (420) comprises a positioning bracket (427), the lower part of which is connected to both ends of the moving bracket (332) and moves with it; a first reduction motor (421) is arranged at one end of the positioning bracket (427), and a tube-threading driving wheel (422) is arranged at the output end of the first reduction motor (421) for squeezing the heat exchange tube (110) to perform a tube-threading operation; a torque sensor (423) is arranged at the lower part of the tube-threading driving wheel (422) for monitoring and recording the force of tube-threading; a pressing wheel (425) is arranged at the colinear part of the tube-threading driving wheel (422), and the pressing wheel (425) extends toward the tube-threading driving wheel (422) through a cylinder (424) for pressing the heat exchange tube (110) against the tube-threading driving wheel (422); and a guide frame (426) is arranged on the side of the pressing wheel (425) for receiving the heat exchange tube (110) pushed by the feeding mechanism (430).

10. The heat exchange tube threading device of a straight tube heat exchanger according to claim 6, characterized in that: The heat exchange tube spacing adjustment mechanism (440) is arranged at the other end of the positioning bracket (427) and is used to adjust the position of another tube-threading driving wheel (422) in the Y-axis direction; the heat exchange tube spacing adjustment mechanism (440) comprises a second servo motor (441), a second lead screw (442), a slider (443) and a slide seat (444); The slide seat (444) is installed at the other end of the positioning bracket (427), and a slider (443) is installed on the slide seat (444). The second lead screw (442) is screwed to the slider (443) and connected to the positioning bracket (427) through a support seat. A second servo motor (441) is arranged at the outer end of the second lead screw (442). When the second servo motor (441) drives the second lead screw (442) to rotate, the slider (443) translates along the axial direction of the second lead screw (442), thereby adjusting the distance between the two tube-penetrating driving wheels (422); wherein, at the upper part of the slider (443), the slider (443) is provided with a second servo motor (441). A reduction motor (421); a tube-threading driving wheel (422) is arranged at the output end of the first reduction motor (421); a torque sensor (423) is arranged at the lower part of the tube-threading driving wheel (422); a pressing wheel (425) is arranged at the colinear position of the tube-threading driving wheel (422); the pressing wheel (425) extends toward the tube-threading driving wheel (422) through a cylinder (424) to press the heat exchange tube (110) against the tube-threading driving wheel (422); and a guide frame (426) is arranged on the side of the pressing wheel (425) for receiving the heat exchange tube (110) pushed by the feeding mechanism (430).

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