Method for introducing a large heat exchange equipment internals

Abstract

The application discloses a method for guiding a large heat exchange equipment inner part into a shell, which comprises the following steps: 1) horizontally placing the shell and restricting it on a base surface; 2) supporting the inner part on the base surface through a first trolley and a second trolley, wherein the first trolley is arranged at a second port of the shell and is axially movably supported on a bottom surface of an inner wall of the shell, the second trolley is arranged adjacent to a second end of the inner part and is movably supported on the base surface outside the second port of the shell, and the moving direction of the second trolley is consistent with the moving direction of the first trolley; and 3) applying a horizontal pulling force along the guiding direction of the inner part on the first end of the inner part through a traction mechanism outside a first port of the shell, thereby pulling the inner part and the first trolley to move towards the first port of the shell to complete the guiding of the inner part. Compared with the prior art, the application does not need to use a travelling crane to lift, thereby reducing the risk of scratching the inner part.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 202210437179.1, filed on April 18, 2022, entitled "A Method for Introducing Internal Components of a Large Heat Exchange Equipment". Technical Field

[0002] This invention belongs to the field of internal component introduction technology for large heat exchange equipment, and specifically relates to a method for introducing internal components into large heat exchange equipment. Background Technology

[0003] Large heat exchange equipment typically consists of a cylindrical shell and internal components constrained within it. For heat exchange equipment exceeding 200 tons, the internal components alone can weigh over 100 tons. During assembly, the prefabricated internal components must be carefully inserted into the shell without contacting or scraping against the inner wall of the shell, as this could easily damage them. However, the large size and weight of the internal components make this insertion process quite challenging.

[0004] Currently, the internal component introduction technology for large heat exchange equipment, such as the invention patent application CN201510594433.9 entitled "Plate Heat Exchanger Core Assembly Trolley and its Usage Method" (publication number CN105129615A), discloses a structure including three pulleys, a plate, and baffles. The plate is welded onto the three pulleys, and the baffles are located at both ends of the plate. The usage method is as follows: the trolley is placed at the lower port of the shell, the core is lifted, and one end of the core's reinforced portion rests on the trolley. A crane is used to slowly push the core into the shell using a spreader until it is in place. The trolley is then removed, and the core's tail positioning plate and positioning slide plate are assembled. The use of the aforementioned assembly trolley allows for adjustment of the core's installation position.

[0005] For example, the invention patent application CN105775991A, entitled "Lifting and Assembly Fixture for Large-Diameter Tube Bundles and Its Usage Method," discloses a lifting and assembly fixture. Its structure includes a tube bundle lifting plate assembly, a fixed pulley assembly, and a tube bundle tension assembly. The tube bundle lifting plate assembly consists of an arc plate and lifting lugs, and the fixed pulley assembly is fixed to a foundation platform. In use: the tube bundle tension assembly is installed at the middle position of the front end of the tube bundle; a wire rope passes around the fixed pulley assembly, with one end passing through the tube bundle and connected to the tension assembly, and the other end connected to another crane; the wire rope, through the fixed pulley assembly, pulls the tube bundle horizontally and at a uniform speed into the housing. This fixture structure allows for uniform and controllable speed during the assembly and lifting of large-diameter tube bundles into and out of the housing, minimizing operational risks; it is also highly versatile and applicable to the assembly of tube bundles of various diameters; thus significantly improving tube bundle assembly efficiency and reducing tube bundle assembly costs.

[0006] The above solutions have the following technical problems:

[0007] 1. All of them require the use of a crane, which is not suitable for outdoor operations or use in places without lifting equipment; and there is a swaying phenomenon when the crane lifts, which may lead to the risk of internal parts scraping against the inner wall of the shell.

[0008] 2. In actual operating conditions, the dimensions of the shell of heat exchange equipment vary. When the inner diameter of the shell increases or decreases, the curvature of the inner wall of the shell also changes. However, the assembly trolley in the aforementioned application CN201510594433.9 is only applicable to heat exchangers of a certain specification and cannot be adjusted according to the shell size. Furthermore, even if the assembly trolley in the aforementioned application could be adjusted according to the shell size, it would still need to be done inside the shell, which would be inconvenient in operation. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a method for introducing internal components of a large heat exchange device without the need for crane lifting, thereby reducing the risk of internal component scratches.

[0010] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a method for introducing internal components of a large heat exchange device. The heat exchange device includes a cylindrical shell and internal components. The shell has an axially extending chamber with a first port and a second port on its two end faces for introducing internal components. The internal components have a first end and a second end opposite to each other in the introduction direction.

[0011] The feature is that the steps for importing the internal components are as follows:

[0012] 1. Place the shell horizontally and constrain it to the base surface;

[0013] 2. The inner component is supported on the base surface by the first trolley and the second trolley. The first end of the first trolley adjacent to the inner component is located at the second port of the housing and is axially movable and supported on the bottom surface of the inner wall of the housing. The second trolley is located adjacent to the second end of the inner component and is movably supported on the base surface outside the second port of the housing. The moving direction of the second trolley is the same as the moving direction of the first trolley.

[0014] Third, a horizontal pulling force along the inner part's introduction direction is applied to the first end of the inner part by a traction mechanism located outside the first port of the housing, thereby pulling the inner part and the first trolley toward the first port of the housing to complete the introduction of the inner part.

[0015] Preferably, a frame assembly connected to the housing is provided on the outer side of the first port of the housing, the traction mechanism is installed on the frame assembly and its output end extends into the housing from the first port and is connected to the first end of the inner part.

[0016] To further reduce the risk of scratches to the internal components, the frame assembly preferably includes:

[0017] The frame body has a channel inside that extends horizontally along the direction of internal component introduction and has an entrance that penetrates its side wall. The entrance of the channel is opposite to the first port of the aforementioned housing, and a slide rail that extends horizontally along the direction of internal component introduction is provided on the bottom wall of the channel.

[0018] A follower trolley is movably mounted on the above, and the follower trolley is provided with a support part;

[0019] The inner component has a first support tube extending axially along the housing at its first end. In step three, after the inner component moves to the point where the first support tube extends out of the housing's first port, the first support tube rests on the support portion of the aforementioned follower trolley and moves along the slide rail together with the follower trolley under the action of the traction mechanism until the first end of the inner component moves to the first port, thus completing the introduction of the inner component. In this way, the cooperation of the slide rail, the trolley, and the traction mechanism ensures that the inner component can only move along its introduction direction without any shaking during the process, thereby reducing the risk of the inner component scraping against the inner wall of the housing.

[0020] Meanwhile, the cooperation between the frame components and the traction mechanism makes the implementation of this application not limited by the site, and it is applicable to open-air operations or occasions without lifting equipment.

[0021] To achieve the connection between the frame body and the shell, a plurality of connectors are provided on the side wall where the entrance of the frame body is located, and the plurality of connectors are arranged at intervals along the circumference of the entrance. Each connector has a connector head that can be connected to the end face where the first port of the shell is located.

[0022] Different housings have different port sizes. To ensure that the frame assembly of this application can be adapted to housings of any port size, the frame assembly further includes multiple strip-shaped mounting plates. The number of mounting plates matches the number of the aforementioned connectors, and these mounting plates are radially mounted on the sidewalls of the frame body. Each connector is mounted on its corresponding mounting plate and can be moved and fixed along the length of the mounting plate. In this way, the position of each connector can be adjusted according to the diameter of the first port of the housing, thereby achieving connection with the housing.

[0023] Preferably, the second end of the internal component is provided with a second support tube extending axially along the housing. Before the introduction operation, the first support tube and the second support tube are supported on the base surface by their respective brackets. When the introduction operation is paused, the second support tube can also be supported by the bracket. When the introduction operation resumes, the bracket can be removed, thus improving the safety and stability of the operation.

[0024] In order to move the inner part more smoothly, the traction mechanism preferably includes a chain with one end connected to the first end of the inner part, a driving device for driving the chain to move in the direction of guiding the inner part, and a locking structure for preventing the chain from moving in the opposite direction.

[0025] Preferably, the driving device includes a hook and a driver that drives the hook to reciprocate along the inner component introduction direction. One end of the hook is a hook structure adapted to the chain, and the other end of the hook is connected to the output end of the driver. When the output end of the driver moves in the inner component introduction direction, one end of the hook hooks into the chain and pulls the chain to move along the inner component introduction direction. When the output end of the driver moves in the opposite direction of the inner component introduction, one end of the hook disengages from the chain and moves along the length of the chain in the opposite direction of the inner component introduction.

[0026] The locking structure includes a ratchet and a pawl that engages with the ratchet. The ratchet is connected to the chain for transmission, and the pawl is rotatably connected to the frame assembly near the ratchet.

[0027] In the above scheme, to make the first cart applicable to shells of different sizes, preferably, the first cart includes a frame and wheels, wherein the top of the frame is provided with a support for supporting the internal components; the bottom of the frame is provided with two wheel frames arranged horizontally and perpendicular to the axial direction of the shell, spaced apart. There are two sets of wheels, each rotatably constrained to the bottom of its corresponding wheel frame, so that the first cart can move along the axial direction of the shell; the tops of the two wheel frames are rotatably constrained to the frame relative to each other, so that the two sets of wheels can move closer or further apart in the first direction. Thus, the angle between the two wheel frames can be adjusted according to the inner diameter of the shell, allowing the wheels on the two wheel frames to move closer or further apart to stably support the inner wall of the shell, thereby making this application applicable to shells of different inner diameters.

[0028] In order to allow adjustment of the first trolley outside the housing, preferably, an adjustment platform is provided on the side of the second port of the housing. The adjustment platform is supported on the base and includes a base. The top surface of the base is provided with a first adjustment plate and a second adjustment plate arranged side by side along the first direction and facing upward, which are connected to the inner wall of the housing. The first adjustment plate has a first side opposite to the second adjustment plate, and the second adjustment plate has a second side opposite to the first side. The first adjustment plate is rotatably constrained on the top surface of the base around its first side, and the second adjustment plate is rotatably constrained on the top surface of the base around its second side, so that the tilt angle of the first adjustment plate and the second adjustment plate can be adjusted so that the corresponding parts of the first adjustment plate and the second adjustment plate are basically flush with the bottom surface of the inner wall of the housing.

[0029] The debugging platform also includes a first limiting member acting on the first adjusting plate to position the first adjusting plate at the required tilt angle, and a second limiting member acting on the second adjusting plate to position the second adjusting plate at the required tilt angle.

[0030] In step two, before entering the housing, the two sets of wheels of the first trolley are supported on the first and second adjustment plates of the above-mentioned debugging platform, and the angles of the two wheel frames are adjusted so that the rotation axes of the two sets of wheels are parallel to the surfaces of the first and second adjustment plates, respectively. Then, under the action of the above-mentioned pulling force, the first trolley moves from the debugging platform to the bottom surface of the inner wall of the housing.

[0031] In this way, the tilt angles of the first and second adjustment plates can be adjusted according to the size of the housing, and then the first trolley can be adjusted on the first and second adjustment plates, thereby enabling the first trolley to be adjusted outside the housing, which facilitates the introduction of internal components.

[0032] Compared with the prior art, the advantages of the present invention are as follows: During the introduction operation, the first end of the inner part is supported on the bottom surface of the inner wall of the shell by the first trolley, and the second end of the inner part is supported on the base surface by the second trolley. Both the first trolley and the second trolley can move along the axial direction of the shell. When a horizontal pulling force along the introduction direction of the inner part is applied to the first end of the inner part, the inner part and the first trolley and the second trolley can be pulled to move and complete the introduction of the inner part. In this process, there is no need to use a crane, which is convenient for outdoor operations or occasions without lifting equipment. It can also improve the stability and safety of the inner part introduction operation and reduce the risk of inner part scratching. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the working state of Embodiment 1 of the present invention;

[0034] Figure 2 This is another working state diagram of Embodiment 1 of the present invention (omitting components such as the housing, the first trolley, and the second trolley).

[0035] Figure 3 This is an exploded perspective view of the frame component in Embodiment 1 of the present invention (the follower trolley is omitted).

[0036] Figure 4 for Figure 2 The right view;

[0037] Figure 5 for Figure 1 Schematic diagram of the structure in direction B;

[0038] Figure 6 for Figure 1 Schematic diagram of the structure in the C-direction;

[0039] Figure 7This is an exploded perspective view of the first trolley supported on the inner wall of the housing in Embodiment 1 of the present invention;

[0040] Figure 8 for Figure 1 Enlarged view of section A;

[0041] Figure 9 This is a schematic diagram of the debugging platform in Embodiment 1 of the present invention;

[0042] Figure 10 This is a cross-sectional view of the debugging platform in Embodiment 1 of the present invention;

[0043] Figure 11 This is another cross-sectional view of the debugging platform in Embodiment 1 of the present invention;

[0044] Figure 12 This is a cross-sectional view along direction D in Embodiment 1 of the present invention (partial view of the internal components, a portion of the first trolley, and a portion of the housing are omitted).

[0045] Figure 13 This is a partial structural diagram of the working state of Embodiment 2 of the present invention;

[0046] Figure 14 for Figure 13 Enlarged view of section B in the middle. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example 1:

[0048] like Figures 1-12 As shown, this is a preferred embodiment of a method for introducing internal components into a large heat exchange device according to the present invention. The heat exchange device includes a cylindrical shell 10 and internal components 20. The shell 10 has an axially extending chamber with a first port 11 and a second port 12 on its two end faces, respectively, for introducing the internal components 20. The internal components 20 are introduced in the following direction (i.e., Figure 1 (In the direction indicated by the arrow from right to left) it has a first end 21 and a second end 22. In this embodiment, as... Figure 1 As shown, the housing 10 is placed horizontally and constrained on the base surface 1a. The housing 10 extends axially in the left-right direction. The first port 11 is located on the left end face of the housing 10, and the second port 12 is located on the right end face of the housing 10. To facilitate the introduction of the inner component 20, a first support tube 23 extending to the left is provided on the first end 21 of the inner component 20, and a second support tube 24 extending to the right is provided on the second end 22 of the inner component 20. After the introduction is completed, the first support tube 23 and the second support tube 24 can be detached from the inner component 20.

[0049] To complete the import of the internal component 20, this embodiment also includes a first trolley 100, a frame assembly 200, a debugging platform 300, a second trolley 400, and a bracket 500.

[0050] like Figures 1-4 As shown, the frame assembly 200 is located on the left side of the housing 10. The frame assembly 200 includes a frame body 210, multiple connectors 220, a mounting plate 230, and a follower trolley 270 described below. The frame body 210 has a channel 211 extending horizontally along the direction of the inner component 20, with an entrance 212 penetrating its sidewall. The entrance 212 of the channel 211 is opposite to the first port 11 of the housing 10. The bottom wall of the channel 211 is provided with a slide rail 260 extending horizontally along the direction of the inner component 20. A follower trolley 270 that can move along the slide rail 260 is provided on the slide rail 260. The top of the follower trolley 270 is provided with a support portion 271 for supporting the inner component 20. Multiple connectors 220 are mounted on the sidewall of the frame body 210 via their respective mounting plates 230 and are arranged circumferentially at intervals along the entrance 212 of the channel 211. Each connector 220 has a connector head 221 that can be connected to the end face of the housing 10. In this embodiment, each connector 220 is a component that can extend and retract along the direction of the inner component 20, and the connector 221 is located at the telescopic end of the component. This allows the length of each connector 220 to be adjusted according to the distance between the end faces of the frame body 210 and the housing 10, thereby ensuring that the connector 221 can be well connected to the end face of the housing 10. The connector 221 and the end face of the housing 10 can be connected by bolts, snap-fit ​​connections, or other detachable methods.

[0051] The number of mounting plates 230 matches the number of connectors 220, and the mounting plates 230 are radially mounted on the side walls of the frame body 210. The inner ends of the mounting plates 230 form a space 233 through which the inner component 20 partially passes. Each connector 220 is mounted on its corresponding mounting plate 230 and can be moved and fixed along the length of the mounting plate 230. Specifically, each mounting plate 230 has a mounting groove 231 extending along its length on its surface. Each connector 220 is inserted into the mounting groove 231 of its corresponding mounting plate 230, and the groove wall of the mounting groove 231 has multiple mounting holes 232 spaced apart along its length. This allows each connector 220 to move along the mounting groove 231 to adjust its position, and then the connector 220 is positioned by the cooperation of bolts or other components with the mounting holes 232.

[0052] The bottom of the frame body 210 is provided with multiple vertically extending support legs 240, each of which is a height-adjustable telescopic structure. Specifically, each support leg 240 is a screw and nut assembly, with the screw 241 of the screw and nut assembly being vertically arranged. The top of the screw 241 is inserted into a hole on the bottom surface of the frame body 210, and the nut 242 of the screw and nut assembly is threadedly connected to the screw 241, with the upper end face of the nut 242 abutting against the bottom surface of the frame body 210. The height of the support leg 240 can be adjusted by rotating the nut 242.

[0053] In this embodiment, the frame body 210 includes a lower frame 213, an upper frame 214 detachably constrained on the lower frame 213, a connector 220 disposed on the side wall of the upper frame 214, and a support leg 240 disposed at the bottom of the lower frame 213. The upper frame 214 is provided with a traction mechanism 250 for moving the inner component 20. The traction mechanism 250 can be a horizontally arranged hydraulic cylinder, pneumatic cylinder, electric cylinder, etc. The output end of the traction mechanism 250 is connected to the first support tube 23 of the inner component 20 through a pull rope, thereby pulling the inner component 20 to move and guide it into the housing 10.

[0054] like Figure 1 , 7 As shown in Figures 8 and 12, the aforementioned first trolley 100 includes a frame 110, wheels 120, and a lifting mechanism capable of being raised and lowered. The top of the frame 110 is provided with a support member 130 for supporting the first end 21 of the inner component 20. The support member 130 is a horizontally arranged plate-like body. To better support the inner component 20, in this embodiment, the top surface of the support member 130 is provided with a limiting groove 131 into which the first end 21 of the inner component 20 is inserted. An anti-slip pad 170 is provided on the bottom wall of the limiting groove 131, and the limiting groove 131 is positioned along a horizontal first direction (i.e.,...). Figure 1 The front and back directions in Figure 7 The inner part 20 has two sidewalls on its left and right sides, each equipped with a push rod 132 that can move along a first direction. Each push rod 132 is horizontally positioned and its inner end extends into a limiting groove 131. Specifically, the two sidewalls of the limiting groove 131 in the first direction are respectively provided with threaded holes 133 extending along the first direction, and the push rods 132 are screws threaded into their respective threaded holes 133. By rotating the push rods 132, the position of the push rods 132 can be adjusted so that the inner end of the push rods 132 abuts against the inner part 20, thereby limiting the inner part 20.

[0055] Meanwhile, in order to adjust the height of the support member 130, the support member 130 is supported on the top of the frame 110 by the aforementioned lifting mechanism. This lifting mechanism includes a telescopic power member 150 located on the top of the frame 110. The telescopic power member 150 is a pneumatic cylinder, hydraulic cylinder, or electric cylinder, and its output end faces upward and abuts against the support member 130. The lifting mechanism also includes a lead screw and nut assembly 160. At least two sets of lead screw and nut assemblies 160 are located around the telescopic power member 150. In each set of lead screw and nut assemblies 160, the second lead screw 161 is vertically arranged, and its top abuts against the support member 130. The second nut 162 in each set of lead screw and nut assemblies 160 is threadedly connected to the second lead screw 161 and constrained to the top of the frame 110. In this embodiment, since the support member 130 is a horizontally arranged plate, in order to support the plate more stably, the output end of the telescopic power member 150 is arranged corresponding to the center of the plate, and each set of screw nut pairs 160 is arranged near the edge of the plate.

[0056] The bottom of the aforementioned frame 110 is provided with two wheel carriers 140 arranged at intervals along a horizontal first direction. Two sets of wheels 120 are rotatably constrained at the bottom of their respective wheel carriers 140, and the rotation axes of each set of wheels 120 extend along the aforementioned first direction. The tops of the two wheel carriers 140 are rotatably constrained to the frame 110, thereby allowing the two sets of wheels 120 to move closer or further apart in the first direction. In this embodiment, the tops of the wheel carriers 140 are rotatably connected to the frame 110 via their respective pivots 141, and each pivot 141 is along a horizontal second direction perpendicular to the first direction (i.e.,...). Figure 7 The front and back directions in Figure 8 Extending in the left and right direction. Each set of wheels 120 has two wheel units 121, and the two wheel units 121 are spaced apart on the wheel frame 140 along the second direction mentioned above.

[0057] In use, the angle between the two wheel carriers 140 is adjusted according to the inner diameter of the housing 10, so that the two sets of wheels 120 on the two wheel carriers 140 are arranged at intervals along the circumference of the housing and can be supported on the inner wall of the housing 10. At this time, each set of wheels 120 can rotate along the axial direction of the housing 10 under the action of external force, thereby guiding the inner component 20 into the housing 10.

[0058] like Figure 1 , 5 As shown, the second trolley 400 is a conventional four-wheeled vehicle structure, located on the base surface 1a to the right of the second port 12 of the housing 10, and used to support the second end 22 of the inner component 20. The moving direction of the second trolley 400 is the same as that of the first trolley 100.

[0059] like Figures 8-12As shown, the aforementioned debugging platform 300 is located on the right side of the housing 10. The debugging platform 300 includes a base 310, a first adjusting plate 320, a second adjusting plate 330, a first limiting member 340, and a second limiting member 350. The first adjusting plate 320 and the second adjusting plate 330 are arranged side by side with their plate surfaces facing upwards on the top surface of the base 310. Furthermore, both the first adjusting plate 320 and the second adjusting plate 330 have positioning grooves 370 extending in the left-right direction on their plate surfaces. The first adjusting plate 320 has a first side 321 opposite to the second adjusting plate 330, and the second adjusting plate 330 has a second side 331 opposite to the first side 321. The first adjusting plate 320 is rotatably constrained to the top surface of the base 310 around its first side 321, and the second adjusting plate 330 is rotatably constrained to the top surface of the base 310 around its second side 331. This allows adjustment of the tilt angles of the first adjusting plate 320 and the second adjusting plate 330 so that the corresponding portions of the first adjusting plate 320 and the second adjusting plate 330 are substantially flush with the bottom surface of the inner wall of the housing 10. Specifically, the first side 321 of the first adjusting plate 320 and the second side 331 of the second adjusting plate 330 both extend in the left-right direction and are spaced apart. The first side 321 of the first adjusting plate 320 and the second side 331 of the second adjusting plate 330 are respectively connected to the top surface of the base 310 through their respective first pins 363 and first nuts 364. The top ends of each first pin 363 are rotatably constrained to their respective adjusting plates. The top surface of the base 310 is provided with a strip-shaped hole 312 extending forward and backward. The bottom end of each first pin 363 passes downward through the strip-shaped hole 312 and is threadedly connected to the first nut 364. In this embodiment, there are four sets of first pins 363 and first nuts 364, which are arranged in pairs at the left and right ends of the first side 321 of the first adjusting plate 320 and the left and right ends of the second side 331 of the second adjusting plate 330.

[0060] Meanwhile, the third side of the first adjusting plate 320 opposite to the first side 321 and the fourth side of the second adjusting plate 330 opposite to the second side 331 are respectively connected to the top surface of the base 310 through their respective second pins 365 and second nuts 366. The top ends of each second pin 365 are rotatably constrained to their respective adjusting plates, and the bottom ends of each second pin 365 pass downward through the aforementioned slotted hole 312 (the slotted hole 312 through which the second pin 365 passes can be connected to the slotted hole through which the first pin 363 passes, but preferably adopts a structure that separates them as shown in the figure), and are threadedly connected to the second nut 366. Similarly, there are four sets of second pins 365 and second nuts 366, which are arranged in pairs at the left and right ends of the third side of the first adjusting plate 320 and the left and right ends of the fourth side of the second adjusting plate 330.

[0061] The first limiting member 340 acts on the first adjusting plate 320 to position the first adjusting plate 320 at the desired tilt angle; the second limiting member 350 acts on the second adjusting plate 330 to position the second adjusting plate 330 at the desired tilt angle. Specifically, the first limiting member 340 includes a first limiting block 341 inserted from front to back between the bottom surface of the first adjusting plate 320 and the top surface of the base 310. The first limiting block 341 has a first inclined surface 342 that mates with the bottom surface of the first adjusting plate 320. The first inclined surface 342 slopes downward from front to back (i.e., the first inclined surface 342 reduces the thickness of the first limiting block 341 from front to back). The second limiting member 350 includes a second limiting block 351 inserted from back to front between the bottom surface of the second adjusting plate 330 and the top surface of the base 310. The second limiting block 351 has a second inclined surface 352 that mates with the bottom surface of the second adjusting plate 330. The second inclined surface 352 slopes downward from back to front (i.e., the second inclined surface 352 reduces the thickness of the second limiting block 351 from back to front). In this embodiment, there are multiple first limiting blocks 341 and second limiting blocks 351, which are arranged at intervals along the left-right direction. Meanwhile, in order to achieve the positioning of each first limiting block 341 and second limiting block 351, each first limiting block 341 and second limiting block 351 is provided with a vertical limiting hole 360. The top surface of the base 310 is provided with a positioning hole 311 corresponding to its respective limiting hole 360. Each first limiting block 341 and second limiting block 351 is constrained to the top surface of the base 310 by its respective bolt 361 and nut 362 (that is, the bolt 361 passes through the corresponding limiting hole 360 ​​and positioning hole 311 and is connected to the nut 362).

[0062] To adjust the height of the first adjusting plate 320 and the second adjusting plate 330, the bottom of the base 310 is provided with multiple vertically extending support columns 380, each of which is a telescopic adjustment structure capable of height adjustment. In this embodiment, each support column 380 is a screw and nut pair, and the screw 381 in the screw and nut pair is vertically arranged. The top of the screw 381 is inserted into the insertion hole on the bottom surface of the base 310. The nut 382 in the screw and nut pair is threadedly connected to the screw 381, and the upper end face of the nut 382 abuts against the bottom surface of the base 310.

[0063] Before the internal components 20 are introduced into operation, the debugging platform 300 is placed on the right side of the second port 12 of the housing 10. The tilt angles of the first adjustment plate 320 and the second adjustment plate 330 are adjusted according to the curvature of the inner peripheral wall of the housing 10 so that the first adjustment plate 320 and the second adjustment plate 330 are basically flush with the corresponding parts of the inner peripheral wall of the housing 10. Then, the first trolley 100 is placed on the debugging platform, and the two sets of wheel frames 140 of the first trolley 100 are adjusted so that the two sets of wheels 120 of the first trolley 100 can be supported on the positioning grooves 370 of the first adjustment plate 320 and the second adjustment plate 330 respectively, and the tires of the two sets of wheels 120 are in contact with the bottom wall of their respective positioning grooves 370.

[0064] The steps for importing component 20 in this embodiment are as follows:

[0065] 1. Place the shell 10 horizontally and constrain it on the base surface 1a;

[0066] 2. Place the first trolley 100 on the adjustment plate of the debugging platform 300, place the second trolley 400 on the base surface 1a on the right side of the housing 10, and then support the first end 21 of the inner part 20 on the support member 130 of the first trolley 100, and support the second end 22 of the inner part 20 on the second trolley 400.

[0067] Third, drive the traction mechanism 250 to apply a horizontal pulling force along the inner part 20 introduction direction to the first end 21 of the inner part 20, thereby pulling the inner part 20 and the first trolley 100 and the second trolley 400 to move in the inner part 20 introduction direction. After the inner part 20 moves to the first support tube 23 extending out of the first port 11 of the housing 10, the first support tube 23 is supported on the support part 271 of the follower trolley 270, and moves along the slide rail 260 together with the follower trolley 270 under the action of the traction mechanism 250 until the first end 21 of the inner part 20 moves to the first port 11 to complete the introduction of the inner part 20.

[0068] After the first support tube 23 is supported on the support part 271 of the follower trolley 270, the first trolley 100 can be moved in the opposite direction of the guide direction and moved out of the housing 10.

[0069] To improve the safety and stability of the internal component introduction operation, when the traction mechanism 250 is temporarily in operation, the first support pipe 23 and the second support pipe 24 on the internal component 20 are supported on the base surface 1a by their respective brackets 500. Example 2:

[0070] like Figure 13 , 14As shown, this is a preferred embodiment of a method for introducing internal components of a large heat exchange device according to the present invention. This embodiment is basically the same as the first embodiment, except that the traction mechanism 250 in this embodiment includes one end (i.e. Figure 13 The chain 251 (right end) connects to the first end 21 of the inner component 20, and drives the chain 251 in the direction of guiding the inner component 20 (i.e., Figure 1 The drive mechanism (in the direction indicated by the middle arrow) and the locking structure that prevents the chain 251 from moving in the opposite direction. The drive mechanism includes a hook 252 and a driver 253 that drives the hook 252 to reciprocate along the guide direction of the inner part 20. One end of the hook 252 is a hook structure adapted to the chain 251, and the other end of the hook 252 is connected to the output end of the driver 253. In this embodiment, the driver 322 is a hydraulic jack. The locking structure includes a ratchet 254 and a pawl 255 that cooperates with the ratchet 254. The ratchet 254 is drivenly connected to the chain 251, and the pawl 255 is rotatably connected to the frame assembly 200 near the ratchet 254. When the output end of the driver 253 moves in the direction of the inner part 20, one end of the hook 252 hooks into the chain 251 and pulls the chain 251 to move in the direction of the inner part 20, and the pawl 255 does not affect the movement of the chain 251; when the output end of the driver 253 moves in the opposite direction of the inner part 20, one end of the hook 252 disengages from the chain 251 and moves in the opposite direction of the inner part 20 along the length of the chain 251, while one end of the pawl 255 engages in the slot of the ratchet 254 to prevent the chain 251 from moving in the opposite direction.

Claims

1. A method for introducing internal components of a large heat exchange device, the heat exchange device including a cylindrical shell (10) and internal components (20), the shell (10) having an axially extending chamber with a first port (11) and a second port (12) on two end faces respectively, for introducing internal components (20), the internal components (20) having a first end (21) and a second end (22) opposite to each other in the introduction direction; Its features The import steps are as follows:

1. Place the shell (10) horizontally and constrain it on the base surface (1a); 2. The inner component (20) is supported on the base surface (1a) by the first trolley (100) and the second trolley (400). The first trolley (100) is located at the second port (12) of the housing (10) near the first end (21) of the inner component (20) and is axially movable and supported on the bottom surface of the inner wall of the housing (10). The second trolley (400) is located at the second end (22) of the inner component (20) and is movably supported on the base surface (1a) outside the second port (12) of the housing (10). The moving direction of the second trolley (400) is consistent with the moving direction of the first trolley (100).

3. A horizontal pulling force along the direction of the inner part (20) is applied to the first end (21) of the inner part (20) by a traction mechanism (250) located outside the first port (11) of the housing (10), thereby pulling the inner part (20) and the first carriage (100) toward the first port (11) of the housing (10) to complete the introduction of the inner part (20); The first trolley (100) includes a frame (110) and wheels (120). The top of the frame (110) is provided with a support member (130) for supporting the inner part (20). The bottom of the frame (110) is provided with two wheel frames (140) arranged horizontally and perpendicular to the axial direction of the housing (10). There are two sets of wheels (120) and they are rotatably constrained to the bottom of their respective wheel frames (140) so that the first trolley (100) can move along the axial direction of the housing (10). The tops of the two wheel frames (140) are rotatably constrained to the frame (110) so that the two sets of wheels (120) can move closer to or further away from each other in the first direction. An adjustment platform (300) is provided on the side of the second port (12) of the housing (10). The adjustment platform (300) is supported on the base surface (1a) and includes a base (310). The top surface of the base (310) is provided with a first adjustment plate (320) and a second adjustment plate (330) arranged side by side along the first direction and facing upward, which are connected to the inner wall of the housing (10). The first adjustment plate (320) has a first side (321) opposite to the second adjustment plate (330), and the second adjustment plate (330) has a first side (321) opposite to the second adjustment plate (330). The first side (321) is opposite to the second side (331). The first adjusting plate (320) is rotatably constrained on the top surface of the base (310) around its first side (321), and the second adjusting plate (330) is rotatably constrained on the top surface of the base (310) around its second side (331). Thus, the tilt angle of the first adjusting plate (320) and the second adjusting plate (330) can be adjusted so that the corresponding parts of the first adjusting plate (320) and the second adjusting plate (330) are basically flush with the bottom surface of the inner wall of the shell (10). The debugging platform (300) also includes a first limiting member (340) acting on the first adjusting plate (320) to position the first adjusting plate (320) at the required tilt angle, and a second limiting member (350) acting on the second adjusting plate (330) to position the second adjusting plate (330) at the required tilt angle; In step two, before entering the housing (10), the two sets of wheels (120) of the first trolley (100) are supported on the first adjustment plate (320) and the second adjustment plate (330) of the above-mentioned debugging platform (300), and the angles of the two wheel frames (140) are adjusted so that the rotation axes of the two sets of wheels (120) are parallel to the plate surfaces of the first and second adjustment plates (330), respectively. Then, under the action of the above-mentioned pulling force, the first trolley (100) moves from the debugging platform (300) to the bottom surface of the inner wall of the housing (10).

Images