A heat exchange tube threading device for a straight tube heat exchanger

Abstract

The present invention proposes a heat exchange tube threading device for a straight tube heat exchanger. The device comprises a tube plate, a baffle fixing assembly, a conveying frame and a conveying device; the conveying frame is located on a lifting platform; a hoisting frame is detachably mounted on the base, a heat exchange tube bracket is provided on the fixing plate, slideways are arranged in parallel on the fixing plate, and a mobile bracket for carrying is provided on the slideways; the conveying device comprises a longitudinal adjustment mechanism, a conveying mechanism, a feeding mechanism and a heat exchange tube spacing adjustment mechanism; the longitudinal adjustment mechanism is connected to the mobile bracket via a nut; the conveying mechanism is symmetrically assembled on the mobile bracket via a positioning bracket, and simultaneously threading two groups of heat exchange tubes; a pressure wheel pushes the heat exchange tube to a threading active wheel, and a torque sensor is provided below the threading active wheel to record the threading force of the heat exchange tube; the heat exchange tube spacing adjustment mechanism adjusts the distance between the two threading active wheels; the feeding mechanism is symmetrically mounted on the mobile bracket, and simultaneously pushes the heat exchange tubes for the two conveying mechanisms.

Description

Technical Field

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

[0002] A straight-tube heat exchanger typically consists of a shell, tubesheet, heat transfer tubes, headers, and baffles. The tubes are arranged in a straight line, with fluid flowing within the tubes while the fluid within the shell exchanges heat through the shell walls. A straight-tube heat exchanger transfers heat through the temperature difference between the fluid inside and outside the tubes. As the fluid flows through the tubes, heat is transferred to the fluid within the shell through the tube walls, achieving heating or cooling. Because the heat transfer tubes are straight, the fluid flow path is short and the pressure drop is minimal, making it suitable for applications requiring rapid heat transfer without pressure loss.

[0003] However, in the process of implementing the technical solutions of the embodiments of the present application, the inventors of the present application discovered that the above technology has at least the following technical problems:

[0004] The heat exchange tubes of straight-tube heat exchangers are typically long and straight, inserted into the baffles of the array. Currently, tube insertion is performed manually, with one person guiding and another pushing the tubes. Because the tube length is not fixed, excessively long tubes can bend radially, causing misalignment between the tube and the baffle mounting holes during insertion. Slight misalignment increases the thrust, and in severe cases, the tube cannot pass through the baffles. Furthermore, forcing the tubes through the baffles can damage the tubes and reduce the lifespan of the equipment. Furthermore, no data is recorded. Tube replacement relies solely on visual inspection, which increases the risk of error. Summary of the Invention

[0005] To address the shortcomings of the prior art, the present invention provides a heat exchange tube threading device for a straight tube heat exchanger, focusing on the issues of threading and assembling heat exchange tubes concentrically with the mounting holes on the baffles of the array, and recording the thrust data for threading the heat exchange tubes to predict damage. The device is positioned using the same reference as the baffles to ensure that the heat exchange tube holes are concentric. A conveying device is also provided on the conveying frame to adjust the position of the heat exchange tubes to correspond to the position of the heat exchange tube holes on the baffles, thereby meeting the requirement for uniform force when threading the two heat exchange tubes and resolving the technical issue of concentric threading of the heat exchange tubes.

[0006] The solution adopted by the embodiment of this application to solve the technical problem is:

[0007] A heat exchange tube threading device for a straight tube heat exchanger comprises a tube sheet, a baffle fixing assembly, a conveying frame and a conveying device;

[0008] The tube sheet is arrayed with heat exchange tube holes for assembling heat exchange tubes; the baffle fixing assembly includes a fixed groove, a movable seat, a baffle and a fixed-moment tube; the baffle is located on the movable seat and is detachably arranged in two fixed grooves, and heat exchange tube holes are also arrayed on the baffle, and the baffles are connected and fixed by fixed-moment tubes; the conveying frame is arranged at one end of the baffle fixing assembly and is located on the lifting platform; the conveying frame includes a base, a hanging frame, a fixed plate and a heat exchange tube bracket; a hanging frame is detachably installed on the base, a fixed plate is provided on the base, a heat exchange tube bracket is provided on the fixed plate, slides are arranged in parallel on the fixed plate, and a movable bracket for carrying is provided on the slide; the conveying device is installed on the movable bracket , including 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 fixed plate and is vertically staggered with the baffle, and a nut is provided in the longitudinal adjustment mechanism, which is connected to the movable bracket through the nut; the conveying mechanism is symmetrically assembled on the movable bracket through the positioning bracket, and the heat exchange tube is pushed to the tube threading active wheel by the pressure wheel, and a torque sensor is provided under the tube threading active wheel to record the tube threading 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 threading active wheels and perform the tube threading operation of two heat exchange tubes at the same time; the feeding mechanism is symmetrically installed in the middle of the movable bracket, and pushes the heat exchange tube 110 for the two conveying mechanisms at the same time;

[0009] Among them, the two conveying mechanisms are installed in the conveying frame, and the position of the pipe-threading active wheel in the Z-axis direction is adjusted by the lifting platform; the position of the pipe-threading active wheel in the Y-axis direction is adjusted by the longitudinal adjustment mechanism; the position of the other pipe-threading active wheel in the Y-axis direction is adjusted by the heat exchange tube spacing adjustment mechanism, and the pipe threading operation of two heat exchange tubes is carried out 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.

[0010] In order to further solve the technical problem to be solved by the embodiment of the present application, in the longitudinal adjustment mechanism provided in the embodiment of the present application, the longitudinal adjustment mechanism includes a first servo motor, a first lead screw, a bearing seat and a nut;

[0011] Bearing seats with bearings are installed at both ends of the first lead screw, and the bearing seats are located in the middle of the fixed plate to support the first lead screw; a first servo motor is provided at the extended end of the first lead screw support, and the first servo motor drives the first lead screw to rotate; the nut is threadedly connected to the first lead screw, and when the first lead screw rotates, the nut translates axially along the first lead screw, and drives the movable bracket to slide, thereby performing radial adjustment of the conveying device.

[0012] Furthermore, the loading mechanism includes a chassis, the lower part of the chassis is connected to the middle part of the movable bracket and moves with it; a second reduction motor is symmetrically arranged on the chassis, and a driving sprocket is installed at the output end of the second reduction motor. The driving sprocket is connected to the driven sprocket through a chain, and the driven sprocket is installed in the middle of the transmission shaft. Push plates are installed at both ends of the transmission shaft. The push plates rotate with the transmission shaft, and a push block is provided on the push plate for pushing the heat exchange tube to perform pipe threading operations.

[0013] Furthermore, the push plate is a wheel-shaped structure mounted on the transmission shaft, and push blocks are arranged in a circumferential array on the outer circumference of the push plate, and the push blocks push the heat exchange tubes to the tube-threading active wheel.

[0014] Furthermore, the conveying mechanism includes a positioning bracket, the lower part of the positioning bracket is connected to the two ends of the movable bracket and moves with it; a first reduction motor is provided at one end of the positioning bracket, and a pipe threading active wheel is provided at the output end of the first reduction motor, which is used to squeeze the heat exchange tube to perform the pipe threading operation; a torque sensor is provided at the lower part of the pipe threading active wheel, which is used to monitor and record the force of the pipe threading; a pressure wheel is provided at the colinear point of the pipe threading active wheel, and the pressure wheel extends to the pipe threading active wheel through a cylinder, which is used to press the heat exchange tube against the pipe threading active wheel; a guide frame is provided on the side of the pressure wheel, which is used to receive the heat exchange tube pushed by the feeding mechanism.

[0015] Furthermore, a heat exchange tube spacing adjustment mechanism is provided 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 adjustment mechanism includes a second servo motor, a second lead screw, a slider and a slide seat;

[0016] The slide is installed at the other end of the positioning bracket, and a slider is assembled on the slide. The second lead screw is screwed to the slider and connected to the positioning bracket through a support seat. A second servo motor is provided at the outer end of the second lead screw. When the second servo motor drives the second lead screw to rotate, the slider is translated along the axial direction of the second lead screw, thereby adjusting the distance between the two pipe-threading active wheels; wherein, a first reduction motor is provided on the upper part of the slider, and a pipe-threading active wheel is provided at the output end of the first reduction motor; a torque sensor is provided at the lower part of the pipe-threading active wheel, and a pressure wheel is provided at the colinear part of the pipe-threading active wheel, which extends to the pipe-threading active wheel through a cylinder to press the heat exchange tube against the pipe-threading active wheel; a guide frame is provided on the side of the pressure wheel for receiving the heat exchange tube pushed by the feeding mechanism.

[0017] Positive effects:

[0018] The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. Since the embodiment of the present application adopts the technical means of a conveying frame located on a lifting platform, the conveying device can adjust the height in the Z-axis direction, and the heat exchange tube pushed by the tube-threading active wheel is consistent in height with the heat exchange tube hole; the longitudinal adjustment mechanism adjusts the position of the tube-threading active wheel 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 tube-threading active wheel in the Y-axis direction so that the other heat exchange tube is aligned with the heat exchange tube hole of the baffle, effectively solving the technical problem of concentric heat exchange tube threading in the prior art, meeting the spacing requirement between the two heat exchange tubes, the two heat exchange tubes are concentric with the heat exchange tube hole of the baffle, the force during threading is consistent, and the threading operation of the two heat exchange tubes is performed simultaneously, thereby improving the working efficiency of assembling the heat exchange tubes of the straight tube heat exchanger, thereby achieving the technical effect of uniform force for threading the heat exchange tubes of the straight tube heat exchanger.

[0020] 2. Because the present embodiment utilizes a torque sensor positioned below the tube-threading drive wheel, the torque sensor records the threading force between each heat exchange tube and the heat exchange tube hole of the baffle. This effectively solves the existing technical problem of predicting damaged heat exchange tubes for repair. This allows identification of potentially damaged heat exchange tubes, predicting the location for replacement, and improving heat exchanger repair efficiency. This further achieves the technical effect of uniform threading force for the heat exchange tubes of a straight-tube heat exchanger.

[0021] The invention is suitable for use as a heat exchange tube threading device of a straight tube heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is the southwest isometric view of this embodiment;

[0024] Figure 2 This is a southeast isometric view of the tube sheet and baffle fixing assembly of this embodiment;

[0025] Figure 3 This is a southwest isometric view of the conveying frame and conveying device of this embodiment;

[0026] Figure 4 This is a northwest isometric view of the conveying frame and conveying device after the lifting frame is removed from this embodiment;

[0027] Figure 5 This is a southeast isometric view of the conveying frame and conveying device after the lifting frame and material rack are disassembled in this embodiment;

[0028] Figure 6 This is a northeast isometric view of the conveying frame and conveying device after the lifting frame and material rack are disassembled in this embodiment;

[0029] Figure 7 This is a southwest isometric view of the loading mechanism of this embodiment;

[0030] Figure 8 This is a southwest isometric view of the conveying mechanism of this embodiment;

[0031] Figure 9 This is a front view of the conveying frame and conveying device after the lifting frame and material rack are disassembled in this embodiment;

[0032] Figure 10 This is a side view of the conveying frame and conveying device after the lifting frame and material rack are disassembled in this embodiment;

[0033] Figure 11 This is a top view of the conveying frame and conveying device after the lifting frame and material rack are disassembled in this embodiment;

[0034] Figure 12 This is the AA cross-sectional view of this embodiment;

[0035] Figure 13 This is a cross-sectional view taken along line BB of this embodiment;

[0036] Figure 14 This is a cross-sectional view taken along line CC of this embodiment;

[0037] Figure 15 This is a DD cross-sectional view of this embodiment.

[0038] In the picture:

[0039] 100. Tube sheet,

[0040] 110. Heat exchange tube,

[0041] 111. Heat exchange tube holes;

[0042] 200. Baffle fixing assembly;

[0043] 210. Fixed slot,

[0044] 211. Rectangular tube,

[0045] 212. Top plate,

[0046] 213. Bolts,

[0047] 214. Bottom plate,

[0048] 215. Pulley;

[0049] 220. Mobile seat,

[0050] 221. Two-wing baffle moving seat,

[0051] 222. Center baffle moving seat;

[0052] 230. Baffle,

[0053] 231.Integral baffle,

[0054] 232.Center baffle,

[0055] 233. Two-wing baffles;

[0056] 240. Fixed moment tube,

[0057] 241. Two-wing baffle fixed moment tube,

[0058] 242.Intermediate baffle fixed moment tube;

[0059] 300.Conveyor frame,

[0060] 310. Base,

[0061] 320. Lifting frame,

[0062] 330. Fixed plate,

[0063] 331. Slide,

[0064] 332. Mobile bracket;

[0065] 340.Heat exchange tube bracket,

[0066] 400. Conveying device,

[0067] 410. Longitudinal adjustment mechanism,

[0068] 411. First servo motor,

[0069] 412. First screw,

[0070] 413. Bearing seat,

[0071] 414. Silk mother;

[0072] 420. Conveying mechanism,

[0073] 421. The first reduction motor,

[0074] 422. Pipe driving wheel,

[0075] 423.Torque sensor,

[0076] 424. Cylinder,

[0077] 425. Pressure wheel,

[0078] 426. Guide frame,

[0079] 427. Positioning bracket;

[0080] 430. Feeding mechanism,

[0081] 431. Chassis,

[0082] 432. Second reduction motor,

[0083] 433. Driving sprocket,

[0084] 434. Chain,

[0085] 435. Driven sprocket,

[0086] 436. Drive shaft,

[0087] 437. Push the plate,

[0088] 438. Push Block;

[0089] 440. Heat exchange tube spacing adjustment mechanism,

[0090] 441. Second servo motor,

[0091] 442. Second screw,

[0092] 443. Slider,

[0093] 444. Slide seat. DETAILED DESCRIPTION

[0094] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached 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 making creative work are within the scope of protection of the present invention.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0096] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0097] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0098] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0099] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two). Similarly,

[0100] "Multiple groups" refers to two or more groups (including two groups), and "multiple tablets" refers to two or more tablets (including two tablets).

[0101] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0102] In the description of the embodiments of this application, unless otherwise specified and defined, the technical term "installation"

[0103] Terms such as "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0104] The embodiment of the present application solves the problem of being unable to control the penetration force of the heat exchange tube 110 when assembling the heat exchange tube 110 on the baffle 230 in the prior art of the straight tube heat exchanger by providing a heat exchange tube penetration device for the straight tube heat exchanger. During the penetration of the heat exchange tube 110, a conveying device 400 is used to adjust the penetration active wheel 422, thereby realizing the adjustment of the three-dimensional position of the heat exchange tube 110, recording the matching relationship between each heat exchange tube 110 and the baffle 230, determining the service life of the heat exchange tube 110, predicting the position for replacing the heat exchange tube 110, ensuring the accuracy of subsequent maintenance, and meeting the requirements of the tube penetration assembly process of the straight tube heat exchanger.

[0105] according to Figure 1-15 As shown, a heat exchange tube threading device for a straight tube heat exchanger includes a tube sheet 100, a baffle fixing assembly 200, a conveying frame 300 and a conveying device 400;

[0106] The tube sheet 100 is provided with heat exchange tube holes 111 for assembling the heat exchange tubes 110. A tube guide 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.

[0107] The baffle fixing assembly 200 is disposed on one side of the tube sheet 100 and includes a fixing slot 210, a movable seat 220, a baffle 230, and a fixed-torque tube 240. The baffles 230 are seated on the movable seat 220 and are detachably arranged in the two fixing slots 210. The baffles 230 can be positioned on the same reference. Heat exchange tube holes 111 are also arranged in an array on the baffles 230. The baffles 230 are connected and fixed by the fixed-torque tube 240. The centers of the tube sheet 100 and the baffles 230 are collinear, so that the heat exchange tube holes 111 are concentric.

[0108] 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 to limit the Z-axis direction so that the heat exchange tube 110 and the heat exchange tube hole 111 on the baffle 230 are adapted to each other, and then the heat exchange tube 110 and the heat exchange tube hole 111 of the baffle 230 are concentric, so that the force is uniform when the tube is threaded; the conveying frame 300 includes a base 310, a hanging frame 320, a fixing plate 330 and a heat exchange tube bracket 340; a hanging frame 320 is detachably installed on the base 310. 20, the hoisting frame 320 is used to transport the conveying frame 300 to the lifting platform. After the hoisting frame 320 is disassembled, the pipe threading operation can be carried out; a fixed plate 330 is provided on the base 310, and a heat exchange tube bracket 340 is provided on the fixed plate 330 for placing the heat exchange tubes 110 for material preparation. A grid structure is provided between the fixed plate 330 and the base 310 to enhance the planar stability of the fixed plate 330; slideways 331 are arranged in parallel on the fixed plate 330, and a movable bracket 332 for carrying is provided on the slideway 331;

[0109] The conveying device 400 is mounted on the movable bracket 332 and includes a longitudinal adjustment mechanism 410, a conveying mechanism 420, a loading mechanism 430 and a heat exchange tube spacing adjustment mechanism 440;

[0110] The longitudinal adjustment mechanism 410 is installed in the middle of the fixed plate 330 and is perpendicular to the baffle 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 longitudinal adjustment mechanism 410 is used to adjust the position of the conveying device 400 in the Y-axis direction so that the heat exchange tube 110 to be threaded is aligned with the heat exchange tube hole 111 of the baffle 230, so that the heat exchange tube 110 and the heat exchange tube hole 111 are collinear, thereby reducing the resistance to the tube threading and achieving uniform force during the tube threading.

[0111] The conveying mechanism 420 is symmetrically assembled on the movable bracket 332 via the positioning bracket 427, and simultaneously performs the pipe threading operation on two groups of heat exchange tubes 110; the heat exchange tubes 110 are pushed to the pipe threading active wheel 422 by the pressing wheel 425, and then the pipe threading active wheel 422 and the pressing wheel 425 squeeze the heat exchange tubes 110, and sequentially penetrate the heat exchange tube holes 111 of the baffle 230, thereby completing the pipe threading operation of the heat exchange tubes 110; a torque sensor 423 is provided below the pipe threading active wheel 422 to record the pipe threading force of the heat exchange tubes 110 and the matching relationship between each heat exchange tube 110 and the baffle 230, thereby ensuring the accuracy of subsequent maintenance;

[0112] The heat exchange tube spacing adjustment mechanism 440 is mounted on one end of the positioning bracket 427 and is used to adjust a conveying mechanism 420, thereby adjusting the distance between the two tube threading driving wheels 422, thereby adjusting the spacing between the two heat exchange tubes 110 so that they match the heat exchange tube holes 111 of the baffle 230, allowing the tube threading operation of two heat exchange tubes 110 to be performed simultaneously;

[0113] The loading 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;

[0114] Among them, two conveying mechanisms 420 are installed in the conveying frame 300, and the pipe threading active wheel 422 adjusts its position in the Z-axis direction through the lifting platform, so that the heat exchange tube 110 and the heat exchange tube hole 111 of the baffle 230 are at the same height; the position of the pipe threading active wheel 422 in the Y-axis direction is adjusted by the longitudinal adjustment mechanism 410, so that one heat exchange tube 110 and the center of the heat exchange tube hole 111 of the baffle 230 are collinear; the position of the other pipe threading active wheel 422 in the Y-axis direction is adjusted by the heat exchange tube spacing adjustment mechanism 440, so that the other heat exchange tube 110 is aligned with the heat exchange tube hole 111 of the baffle 230, meeting the spacing requirement between the two heat exchange tubes 110, and the pipe threading operation of the two heat exchange tubes 110 is performed at the same time; the torque sensor 423 records the matching relationship between each heat exchange tube 110 and the heat exchange tube hole 111 of the baffle 230, predicts the position of replacing the heat exchange tube 110, and improves the maintenance efficiency of the heat exchanger.

[0115] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0116] Since the conveying frame 300 is located on the lifting platform, the conveying device can adjust the height in the Z-axis direction, so that the heat exchange tube 110 pushed by the tube-threading active wheel 422 is at the same height as the heat exchange tube hole 111 of the baffle 230; the longitudinal adjustment mechanism 410 adjusts the position of the tube-threading active wheel 422 in the Y-axis direction, so that one heat exchange tube 110 is concentric with the heat exchange tube hole 111 of the baffle 230; at the same time, the heat exchange tube spacing adjustment mechanism 440 adjusts the position of the other tube-threading active wheel 422 in the Y-axis direction, so that the other heat exchange tube 110 is aligned with the heat exchange tube hole 111 of the baffle 230, meeting the spacing requirement between the two heat exchange tubes 110, so that the two heat exchange tubes 110 are concentric with the heat exchange tube hole 111 of the baffle 230, and the force during tube threading is consistent and the tube threading operation of the two heat exchange tubes 110 is performed at the same time, thereby improving the working efficiency of assembling heat exchange tubes of the straight tube heat exchanger.

[0117] Since a torque sensor 423 is provided below the tube-threading driving wheel 422, the tube-threading force between each heat exchange tube 110 and the heat exchange tube hole 111 of the baffle 230 is recorded by the torque sensor 423, thereby determining the heat exchange tube 110 that may be damaged, thereby predicting the position for replacing the heat exchange tube 110 and improving the maintenance efficiency of the heat exchanger.

[0118] In order to ensure the stability of the structure of this embodiment, the fixing groove 210 is a long strip-shaped structure, including a rectangular tube 211, a top plate 212, a bolt 213, a bottom plate 214 and a pulley 215;

[0119] 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 open on one side, 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.

[0120] 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, which is arranged in the middle of the fixing groove 210; the central baffle plate 232 is an integral partial baffle plate, which is arranged on both sides of the integral baffle plate 231; the two-wing baffle plates 233 are split partial baffle plates, which are arranged between the central baffle plates 232, so that the heat exchange tubes 110 are staggered and 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 pipe threading, thereby ensuring that the pipe threading force is consistent and avoiding damaging the heat exchange tubes 110.

[0121] 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 for carrying the integral baffle plate 231 and the central baffle plate 232, and the two-wing baffle plate moving seat 221 is used for carrying the two-wing baffle plates 233.

[0122] 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 connected to the baffle plate 230 in sequence; 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 for connecting the integral baffle plate 231 and the central baffle plate 232, and the two-wing baffle plate fixed-distance pipe 241 is used for connecting 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.

[0123] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0124] 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 staggered and sleeved in the heat exchange tube holes 111, and further the contact between the heat exchange tubes 110 and the heat exchange tube holes 111 is reduced, so that the resistance of pipe threading can be reduced, and the pipe threading force can be ensured to be consistent.

[0125] In order 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 seat 413 and a nut 414;

[0126] Bearing seats 413 with bearings are installed at both ends of the first lead screw 412. 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 provided 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. 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, thereby performing radial adjustment of the conveying device 400.

[0127] In order to optimize the structure of this embodiment, the loading mechanism 430 includes a chassis 431, which is a frame structure, and the lower part 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, and a driving sprocket 433 is installed at the output end of the second reduction motor 432. The driving sprocket 433 is connected to the driven sprocket 435 through a chain 434, and the driven sprocket 435 is installed in the middle part of the transmission shaft 436. Push plates 437 are installed at both ends of the transmission shaft 436. The push plate 437 rotates with the transmission shaft 436, and a push block 438 is provided on the push plate 437 for pushing the heat exchange tube 110 to load and perform pipe threading operations.

[0128] In this embodiment, the push plate 437 is a wheel-shaped structure mounted 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 .

[0129] In order 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 the two ends of the movable bracket 332 and moves with it; a first reduction motor 421 is provided at one end of the positioning bracket 427, and a pipe-threading driving wheel 422 is provided at the output end of the first reduction motor 421 for squeezing the heat exchange tube 110 for pipe-threading operation; a torque sensor 423 is provided at the lower part of the pipe-threading driving wheel 422 for monitoring and recording the force of pipe-threading, and then judging whether the heat exchange tube may be damaged. 110, so as to predict the position of replacing the heat exchange tube 110 and improve the maintenance efficiency of the heat exchanger; a pressure wheel 425 is provided at the colinear position of the tube-threading active wheel 422, and the pressure wheel 425 extends toward the tube-threading active wheel 422 through the cylinder 424, and is used to press the heat exchange tube 110 against the tube-threading active wheel 422, and then the tube-threading active wheel 422 transports the heat exchange tube 110 to the deflector 230 for tube-threading operation; a guide frame 426 is provided on the side of the pressure wheel 425, and is used to receive the heat exchange tube 110 pushed by the feeding mechanism 430.

[0130] In order to further optimize the structure of this embodiment, a heat exchange tube spacing adjustment mechanism 440 is provided at the other end of the positioning bracket 427, and is used to adjust the position of the other tube insertion active wheel 422 in the Y-axis direction so that the other heat exchange tube 110 is aligned with the heat exchange tube hole 111 of the baffle 230 at the same time, meeting the spacing requirement between the two heat exchange tubes 110. As a result, the two heat exchange tubes 110 are concentric with the heat exchange tube holes 111 of the baffle 230, and the force used during tube insertion is consistent, and the tube insertion operation of the two heat exchange tubes 110 is performed simultaneously, thereby improving the working efficiency of assembling heat exchange tubes in 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.

[0131] The slide 444 is mounted on the other end of the positioning bracket 427, and a slider 443 is assembled on the slide 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 provided 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 moves axially along the second lead screw 442, thereby adjusting the distance between the two tube-penetrating driving wheels 422. The first reduction motor 421, the output end of the first reduction motor 421 is provided with a tube-threading driving wheel 422; a torque sensor 423 is provided at the lower part of the tube-threading driving wheel 422, and a pressure wheel 425 is provided at the colinear part of the tube-threading driving wheel 422. The pressure wheel 425 extends toward the tube-threading driving wheel 422 through the cylinder 424, and presses the heat exchange tube 110 against the tube-threading driving wheel 422; a guide frame 426 is provided on the side of the pressure wheel 425 for receiving the heat exchange tube 110 pushed by the feeding mechanism 430.

[0132] Preferably, the lifting frame 320 is an open frame structure at the bottom, the lifting frame 320 is provided with column legs at the bottom, and corresponding column seats are provided on the base 310, and the column legs and the column seats are detachably connected by a bolt assembly; the lifting frame 320 is provided with lifting ears at the top for lifting and transporting the conveying frame 300 and the conveying device 400.

[0133] The heat exchange tube bracket 340 is a saddle-type frame structure with seat plates provided around the bottom. The heat exchange tube bracket 340 is detachably connected to the fixing plate 330 by a bolt assembly.

[0134] The working process of this embodiment:

[0135] The following steps are involved:

[0136] A. Fix the fixed groove 210 of the baffle 230 and the tube sheet 100, move the movable seat 220 of the baffle 230, place the baffle 230 and the distance tube 240 in sequence, and fix them with a pull rod, and lock the movable seat 220 of the baffle 230 on the fixed groove 210;

[0137] B, installing the longitudinal adjustment mechanism 410;

[0138] C. Hoist the conveying frame 300 and the conveying device 400 to the lifting platform and remove the hoisting frame 320;

[0139] D, install the heat exchange tube bracket 340;

[0140] E. First, adjust the lifting platform to the appropriate height, then adjust the longitudinal adjustment mechanism 410, and finally adjust the heat exchange tube spacing adjustment mechanism 440 so that the distance between the two tube-threading driving wheels 422 matches the distance between the two heat exchange tubes 110;

[0141] F, manually fill the heat exchange tube 110 into the heat exchange tube bracket 340 and set the torque value of the torque sensor 423;

[0142] 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 is actuated to push the heat exchange tube 100 to the tube-threading driving wheel 422 and press it tightly. Start the first reduction motor 421, and the tube-threading driving wheel 422 drives the heat exchange tube 110 forward. When the torque value of the torque sensor 423 exceeds the set value, an alarm is triggered and the value and the position information of the heat exchange tube 110 are recorded by the computer. When the heat exchange tube 110 leaves the tube-threading driving wheel 422 and reaches the predetermined position, the first reduction motor 421 stops. Adjust the longitudinal adjustment mechanism 410 to reach the designated position of the next group of heat exchange tubes 110. Feedback the signal to the feeding mechanism 430 and start it again, and repeat step G.

[0143] H, until all the heat exchange tubes 110 in this row are threaded;

[0144] I. Adjust the height of the lifting platform to the height of the next row of heat exchange tubes 110, and repeat steps G, H, and I until all heat exchange tubes 110 have been threaded.

[0145] J. Remove the heat exchange tube bracket 340, install the hoisting frame 320, hoist the mobile conveying frame 300 and the conveying device 400 to a safe place, and complete the subsequent pipe threading action.

[0146] It is worth noting that the contents not described in detail in the specification belong to the existing technology 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 can be determined using conventional equipment. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the existing technology and will not be described here.

[0147] The description of the present invention has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the form disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as are suited for specific applications.

[0148] Finally, it should be noted that:

[0149] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat exchange tube threading device for a straight tube heat exchanger, characterized by: 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 assembling heat exchange tubes (110); The baffle fixing assembly (200) includes a fixing groove (210), a movable seat (220), a baffle (230) and a fixed-moment tube (240); the baffle (230) is located on the movable seat (220) and is detachably arranged in the 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-moment 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) includes 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 carrying is arranged on the slideway (331); The conveying device (400) is installed on the movable bracket (332), and includes 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 (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 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 provided 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; a nut (414) is screwed 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, thereby performing radial adjustment of the conveying device (400); The conveying mechanism (420) is symmetrically assembled on the movable bracket (332) via the positioning bracket (427), and the heat exchange tube (110) is pushed to the tube-threading driving wheel (422) via the 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) to simultaneously perform the tube threading operation on the two heat exchange tubes (110); 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-threading active wheel (422) in the Y-axis direction; 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 (444) is mounted on the other end of the positioning bracket (427), and a slider (443) is mounted on the slide (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 provided 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) moves axially along the second lead screw (442), thereby adjusting the distance between the two tube-penetrating driving wheels (422); wherein, the second servo motor (441) at the upper part of the slider (443) is connected to the slider (443). A reduction motor (421), wherein the output end of the first reduction motor (421) is provided with a tube-threading driving wheel (422); a torque sensor (423) is provided at the lower portion of the tube-threading driving wheel (422); a pressure wheel (425) is provided at the colinear position of the tube-threading driving wheel (422); the pressure 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); a guide frame (426) is provided on the side of the pressure wheel (425) for receiving the heat exchange tube (110) pushed by the feeding mechanism (430); The loading 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); The two conveying mechanisms (420) are installed in the conveying frame (300), and the position of the pipe-threading driving wheel (422) in the Z-axis direction is adjusted by the lifting platform; the position of the pipe-threading driving wheel (422) in the Y-axis direction is adjusted by the longitudinal adjustment mechanism (410); the position of the other pipe-threading driving wheel (422) in the Y-axis direction is adjusted by the heat exchange tube spacing adjustment mechanism (440), and the pipe-threading operation of the two heat exchange tubes (110) is performed simultaneously; and the matching relationship between each heat exchange tube (110) and the heat exchange tube hole (111) of the baffle (230) is recorded by the torque sensor (423).

2. The heat exchange tube threading device of a straight tube heat exchanger according to claim 1, characterized in that: The fixing groove (210) includes a rectangular tube (211), a top plate (212), bolts (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 open on one side, and pulleys (215) for supporting the moving seat (220) are assembled in the U-shape. The baffle plate (230) is positioned between the two fixed slots (210) and locked and fixed by bolts (213).

3. The heat exchange tube threading device of a straight tube type heat exchanger according to claim 2, wherein: 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, which is arranged in the middle of the fixed slot (210); the central baffle plate (232) is an integral partial baffle plate, which is arranged on both sides of the integral baffle plate (231); the two-wing baffle plates (233) are split partial baffle plates, which are arranged between the central baffle plates (232).

4. The heat exchange tube threading device of a straight tube type heat exchanger according to claim 3, wherein: The upper part of the moving seat (220) is assembled with a baffle plate (230), and the lower part at both ends is connected with the pulleys (215); the moving seat (220) 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).

5. The heat exchange tube threading device of a straight tube type heat exchanger according to claim 3, wherein: 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 plate (230); the fixed-distance tube (240) includes a two-wing baffle plate fixed-distance tube (241) and an intermediate baffle plate fixed-distance tube (242); The intermediate baffle plate fixed-distance tube (242) is used to connect the integral baffle plate (231) and the central baffle plate (232), and the two-wing baffle plate fixed-distance tube (241) is used to connect the integral baffle plate (231) and the two-wing baffle plates (233).

6. The heat exchange tube threading device of a straight tube type heat exchanger according to claim 1, wherein: The feeding mechanism (430) includes a chassis (431), and the lower part of the chassis (431) is connected to the middle part of the moving bracket (332) 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 provided 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 disks (437) are installed at both ends of the transmission shaft (436), the pushing disks (437) rotate with the transmission shaft (436), and pushing blocks (438) are arranged on the pushing disks (437) for pushing the heat exchange tubes (110) to be fed for threading operations.

7. The heat exchange tube threading device for a straight tube heat exchanger according to claim 6, characterized in that: The push plate (437) is a wheel-shaped structure mounted on the transmission shaft (436). 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).

8. The heat exchange tube threading device for a straight tube heat exchanger according to claim 1, characterized in that: The conveying mechanism (420) includes a positioning bracket (427), the lower portion of which is connected to both ends of the moving bracket (332) and moves with the moving bracket (332); a first reduction motor (421) is provided at one end of the positioning bracket (427), and a tube-threading driving wheel (422) is provided at the output end of the first reduction motor (421) for squeezing the heat exchange tube (110) to perform the tube-threading operation; a torque sensor (423) is provided at the lower portion of the tube-threading driving wheel (422) for monitoring and recording the force of the tube-threading driving wheel (422); a pressing wheel (425) is provided at a colinear position of the tube-threading driving wheel (422), the pressing wheel (425) extending 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 provided 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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