A hot gas duct assembly connection device and method of installing the same

Abstract

The present application relates to hot gas duct assembly group pair technical field, specifically to a kind of hot gas duct assembly connecting device and its installation method.The present application provides a kind of hot gas duct assembly connecting device, including operation platform, first embedded part, second embedded part, first supporting structure and second supporting structure, the first supporting structure is connected with the first embedded part, the second supporting structure is connected with the second embedded part.The application is embedded in the first embedded part in advance in installation channel, the second embedded part is embedded on the side wall of steam generator cabin, pre-assembled operation platform is simultaneously outside the field, while being able to connect the first supporting structure with the first embedded part in situ, the second supporting structure is connected with the second embedded part, after connecting, the assembled operation platform is hoisted to specified position, with first supporting structure and second supporting structure can be detachably connected, shortens overall construction period.

Description

Technical Field

[0001] This invention relates to the field of hot gas duct assembly technology, and more specifically to a device for connecting hot gas duct assemblies and its installation method. Background Technology

[0002] The reactor pressure vessel, hot gas duct assembly (including internals, intermediate section cylinder and shell), and steam generator shell (including steam generator and steam generator cylinder) are the primary loop equipment of the nuclear island of the 600MW Yantai project. The entire connection process is referred to as "primary loop main equipment connection".

[0003] Based on the compartment layout and equipment arrangement structure, the hot gas duct assembly installation area is located in the passage between the pressure vessel compartment and the steam generator compartment. Furthermore, there is no floor slab designed at the installation location of the hot gas duct assembly, so it is not possible to introduce the hot gas duct assembly from the steam generator compartment through a ring lift. Therefore, a hot gas duct assembly connection device is required.

[0004] Currently, common devices for connecting hot gas duct components include operating platforms and cranes. Workers need to set up operating platforms on site and construct support structures at the bottom of the operating platforms according to the load-bearing points and the existing civil engineering structures to ensure the stability of the operating platforms. After the hot gas duct components are lifted by the crane and moved to the designated position, the workers stand on the operating platforms to assemble the hot gas duct components.

[0005] However, the above method requires the operating platform to be set up on-site, and the construction of the operating platform and supporting structure takes about 35 days. The long construction period leads to delays in the subsequent assembly of hot gas duct components and steam generators, resulting in a long construction period for the entire project. Summary of the Invention

[0006] (i) The problem to be solved by the present invention is that the operating platform is welded and fixed on site, and the welding of the operating platform takes about 35 days. The long construction period leads to delays in the subsequent assembly of hot gas duct components and steam generators.

[0007] (II) Technical Solution The present invention provides a device for connecting a hot gas duct assembly. The hot gas duct assembly is installed between a steam generator and a pressure vessel. The steam generator is located in a steam generator compartment, and the pressure vessel is located in a pressure vessel compartment. An installation channel is provided between the pressure vessel compartment and the steam generator compartment. The device for connecting the hot gas duct assembly includes an operating platform, a first embedded part, a second embedded part, a first support structure, and a second support structure. The first embedded part is provided in the installation channel, and the second embedded part is provided on the inner side wall of the steam generator compartment. The first support structure is connected to the first embedded part, and the second support structure is connected to the second embedded part; The operating platform is detachably connected to the first support structure and the second support structure on both sides of its bottom. The first support structure and the second support structure cooperate to support and fix the operating platform.

[0008] According to one embodiment of the present invention, the first support structure includes a plurality of columns, the bottom end of each column being welded to the first embedded part, and the other end of the column being connected to the operating platform through a first fastener.

[0009] According to one embodiment of the present invention, the second support structure includes a corbel and a crossbeam support; The bracket component corresponds one-to-one with the second embedded component, and the bracket component is welded to the second embedded component; Each of the brackets is connected to the crossbeam support for fixing the crossbeam support; The crossbeam support is connected to the operating platform via a second fastener.

[0010] According to one embodiment of the present invention, the operating platform is provided with a transport mechanism for transporting the hot gas duct assembly.

[0011] According to one embodiment of the present invention, the transport mechanism includes a carrying trolley and a support assembly; The carrying trolley includes a base, with a flat plate symmetrically provided on the top of the base, and multiple sets of first traveling wheel structures and multiple sets of second traveling wheel structures respectively provided on both sides of its bottom. The plate is provided with a support component for supporting the hot gas duct assembly.

[0012] According to one embodiment of the present invention, the hot gas duct assembly connection device further includes a lifting component, and the support component cooperates with the lifting component to dock the hot gas duct assembly with the pressure vessel.

[0013] According to one embodiment of the present invention, the operating platform is provided with a guide rail, and the second traveling wheel structure is provided with a guide structure. The guide rail and the guide structure cooperate to make the carrying trolley move along the length direction of the guide rail.

[0014] According to one embodiment of the present invention, the operating platform is provided with first lifting lugs symmetrically on both sides, and each of the crossbeam support members is provided with second lifting lugs symmetrically.

[0015] According to one embodiment of the present invention, both ends of the guide rail are provided with stop blocks, which are used to restrict the trolley from sliding off the guide rail.

[0016] According to an embodiment of the present invention, a method for installing a hot gas duct assembly connection device includes the following steps: S1: The first embedded part and the second embedded part are pre-embedded in the installation channel and the side wall of the steam generator compartment, respectively; S2: Weld the column to the first embedded part, and weld the bracket to the second embedded part, then install the crossbeam support. S3: The circular crane connects to the first lifting lug via the lifting strap, lifts the operating platform into the installation channel, and fixes one side of the operating platform to the column with the first fastener, and fixes the other side of the platform to the crossbeam support with the second fastener. S4: After hoisting the trolley onto the operating platform, place the support components on the trolley.

[0017] The beneficial effects of this invention are: The first embedded part is pre-installed in the installation channel, and the second embedded part is pre-installed on the side wall of the steam generator compartment. The operating platform is pre-assembled off-site. Simultaneously, the first support structure can be connected to the first embedded part, and the second support structure can be connected to the second embedded part on-site. After connection, the assembled operating platform is hoisted to the designated position and detachably connected to the first and second support structures. Due to the pre-installed first and second embedded parts, the first and second support structures can be connected to the main structure (the pre-formed civil engineering structure), improving load-bearing capacity and ensuring the stability of the operating platform after installation. This method replaces the traditional method of directly erecting the operating platform and support structure on-site, thus shortening the construction period and reducing the likelihood of delays in subsequent tasks such as the assembly of hot gas duct components and the steam generator due to excessively long construction periods, thereby shortening the overall construction time. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A perspective view of the hot gas duct assembly connection device provided in an embodiment of the present invention, excluding the supporting component; Figure 2 A perspective view of the operating platform and guide rail provided in an embodiment of the present invention; Figure 3 A perspective view of the carrier trolley provided in an embodiment of the present invention; Figure 4 Provided for embodiments of the present invention Figure 3 Enlarged view of section A; Figure 5 A perspective view of the lifting component provided in an embodiment of the present invention; Figure 6 A perspective view of the first support member in the support assembly provided in an embodiment of the present invention; Figure 7 A perspective view of the second support member in the support assembly provided in an embodiment of the present invention; Figure 8 A perspective view of the third support member in the support assembly provided in an embodiment of the present invention; Figure 9 A perspective view of the fourth support member in the support assembly provided in an embodiment of the present invention; Figure 10 A schematic diagram showing the positional relationship between the hot gas duct assembly device, the steam generator compartment, and the pressure vessel compartment provided in an embodiment of the present invention; Figure 11 A schematic diagram showing the positional relationship between the operating platform, the steam generator compartment, and the pressure vessel compartment provided in an embodiment of the present invention.

[0020] Icons: 1. Operating platform; 2. First support structure; 201. Column; 3. Second support structure; 301. Bracket; 302. Crossbeam support; 4. Carrying trolley; 401. Base; 402. Flat plate; 403. First traveling wheel structure; 404. Second traveling wheel structure; 405. Connecting plate; 406. Adjusting bolt; 407. Ring; 408. First nut; 409. Second nut; 5. Guide rail; 6. First lifting lug; 7. Second lifting lug; 8. Stop block; 9. Pressure vessel compartment; 10. Steam generator compartment; 11. Top rod; 12. First ring belt; 13. Hand chain hoist; 14. Second ring belt; 15. L-shaped rod; 16. First base plate; 17. Counterweight block; 18. First upright; 19. Second upright; 20. Pad plate; 21. Third upright; 22. Second base plate. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: like Figures 1-11As shown, one embodiment of the present invention provides a device for connecting a hot gas duct assembly. The hot gas duct assembly is installed between a steam generator and a pressure vessel. The steam generator is located in a steam generator compartment 10, and the pressure vessel is located in a pressure vessel compartment 9. An installation channel is provided between the pressure vessel compartment 9 and the steam generator compartment 10. The device for connecting the hot gas duct assembly includes an operating platform 1, a first embedded part, a second embedded part, a first support structure 2, and a second support structure 3. The installation channel is equipped with a first embedded part, and the steam generator compartment 10 is equipped with a second embedded part on the inner wall of the steam generator compartment 10. The first support structure 2 is connected to the first embedded part, and the second support structure 3 is connected to the second embedded part; The bottom sides of the operating platform 1 are detachably connected to a first support structure 2 and a second support structure 3, which work together to support and fix the operating platform 1.

[0023] A first embedded part is pre-installed in the installation channel, and a second embedded part is pre-installed on the side wall of the steam generator compartment 10. The operating platform 1 is pre-assembled off-site. Simultaneously, the first support structure 2 and the second support structure 3 can be connected to the first embedded part on-site. After connection, the assembled operating platform 1 is hoisted to the designated position and detachably connected to the first support structure 2 and the second support structure 3. Due to the pre-installed first and second embedded parts, the first support structure 2 and the second support structure 3 can be connected to the main structure (the pre-formed civil engineering structure), improving load-bearing capacity and ensuring the stability of the operating platform 1 after installation. This method replaces the traditional method of directly erecting the operating platform 1 and support structure on-site, thereby shortening the construction period and reducing the likelihood of delays in subsequent work such as the assembly of hot gas duct components and the steam generator due to excessively long construction periods, thus shortening the overall construction period.

[0024] There are multiple first embedded parts set in the installation channel and located at the bottom of the installation channel. The first support structure 2 includes multiple columns 201, each column 201 corresponding to a first embedded part. The bottom end of each column 201 is welded to the first embedded part, and its other end is connected to the operating platform 1 through a first fastener.

[0025] Furthermore, the column 201 includes an integrally formed square plate and column body, the square plate is provided with a plurality of first mounting holes, and the first fastener includes a first bolt; The bottom of the operating platform 1 is provided with multiple first screw holes. The first bolt, the first mounting hole, and the first screw hole correspond one-to-one. After the first bolt passes through the first mounting hole, it is screwed into the first screw hole, thereby fixing the operating platform 1 and the column 201 in relative position. The fixing method is simple, the disassembly difficulty is small, and the efficiency is higher when dismantling the operating platform 1 in the future. It is also convenient for the subsequent reuse of the operating platform 1.

[0026] According to one embodiment of the present invention, the second support structure 3 includes a bracket 301 and a crossbeam support 302. The bracket 301 corresponds one-to-one with the second embedded part, and the bracket 301 is welded to the corresponding second embedded part. Each bracket 301 is connected to the crossbeam support 302 via a second bolt for fixing the crossbeam support 302. To improve the supporting force on the operating platform 1, the second support structure 3 is provided in two sets. Each crossbeam support 302 is symmetrically provided with a second lifting lug 7. The crossbeam support 302 includes a crossbeam, with connecting rods symmetrically connected to both sides of the crossbeam. Both ends of the crossbeam and each connecting rod are detachably connected to a bracket 301. The connecting rods enhance the supporting force of the crossbeam support 302. The operating platform 1 is located above the crossbeam, and the bottom surface of the operating platform 1 is in contact with the upper surface of the crossbeam. The distance between the two connecting rods connected to both ends of the crossbeam is greater than the width of the operating platform 1. The crossbeam support 302 is connected to the operating platform 1 via a second fastener. The second fastener has the same structure as the first fastener and will not be described in detail.

[0027] The bottom of the column 201 is welded to the first embedded part, and the bracket 301 is welded to the second embedded part. The ring crane is connected to the second lifting lug 7 through the lifting strap. The crossbeam support 302 and the bracket 301 are connected by the second bolt. The operating platform 1 is symmetrically provided with the first lifting lug 6 on both sides. The ring crane is connected to the first lifting lug 6 through the lifting strap. The operating platform 1 is lifted above the column 201 and the crossbeam support 302. One side of the operating platform 1 rests on the column 201, and the other side rests on the crossbeam support 302. It is detachably fixed by the first fastener and the second fastener. The modular design allows the assembly of the operating platform 1 and the crossbeam support 302 to be carried out at the same time, shortening the on-site construction time. Compared with welding the operating platform 1 directly on-site, the difficulty is reduced, the amount of welding work is reduced, and the construction period is shortened.

[0028] Traditionally, the hot gas duct assembly is connected by a crane, which lifts the assembly to the designated location. However, this method takes up the crane's operating time, affecting other hoisting work on site and extending the overall project duration.

[0029] According to one embodiment of the present invention, the operating platform 1 is provided with a transport mechanism for transporting hot gas duct assemblies.

[0030] Furthermore, the transport mechanism includes a carrying trolley 4 and a support assembly. The carrying trolley 4 includes a base 401, with a flat plate 402 symmetrically arranged on the top of the base 401. Multiple sets of first traveling wheel structures 403 and multiple sets of second traveling wheel structures 404 are respectively arranged on both sides of its bottom. The flat plate 402 is provided with a support assembly for supporting the hot air duct assembly. The support assembly includes a pad 20, a first support member, a second support member, a third support member, and a fourth support member. The first support member is used to support the inner parts in the hot gas duct assembly, the second support member is used to support the middle section cylinder in the hot gas duct assembly, the third support member is used to support the shell in the hot gas duct assembly, and the fourth support member is used for temporary support. The top of the installation channel is provided with a lifting assembly, and the support assembly cooperates with the lifting assembly to connect the hot gas duct assembly to the pressure vessel.

[0031] The hot gas duct assembly is transported to the docking position by the trolley 4 and the support components. The hot gas duct assembly and the pressure vessel are then docked by the lifting and support components, replacing the crane transportation and docking. This allows the crane to perform other on-site hoisting work during the hot gas duct assembly assembly and installation, thereby reducing the overall construction period.

[0032] The height of the hot air duct assembly can be adjusted by lifting the components; specifically, for example... Figure 5 As shown, the lifting assembly includes a top rod 11 fixed to the top wall of the installation channel. Two first ring belts 12 are connected to the top rod 11. The top rod 11 has blocks at both ends to prevent the first ring belts 12 from slipping off the top rod 11. Each first ring belt 12 is connected to a hand chain hoist 13. The two hand chain hoists 13 are used to hook the two ends of the second ring belt 14 respectively.

[0033] like Figure 6 As shown, the first support includes an L-shaped rod 15, a first base plate 16, and a counterweight 17. The first base plate 16 is placed on the flat plate 402 of the carrying trolley 4. The L-shaped rod 15 is fixedly connected to the first base plate 16. The counterweight 17 is placed above the first base plate 16. There are three counterweights 17, two of which are located on both sides of the L-shaped rod 15, and the remaining one is pressed on top of the two counterweights 17 to press down the first base plate 16 and prevent the L-shaped rod 15 from tipping over. The L-shaped rod 15 includes a horizontal bar and a vertical bar. The horizontal bar of the L-shaped rod 15 is used to support the internal components. The horizontal bar passes through the internal components. The carrying trolley 4 is manually pushed to connect the internal components with the core support structure of the pressure vessel. After completion, the first support is removed and the carrying trolley 4 is pushed back to its original position. Place a pad 20 on the carrying trolley 4, and place a second support member on the pad 20, such as... Figure 7As shown, the second support includes two first uprights 18. The top of the first uprights 18 is arc-shaped. By placing the middle section of the hot air duct assembly on the two first uprights 18, the carrying trolley 4 is pushed to move the middle section of the hot air duct assembly to one end of the inner part. When the middle section needs to be adjusted in height, one end of the second ring belt 14 is removed from the corresponding hand chain hoist 13, passed around the middle section and then hung up. At the same time, the operator pulls the two hand chain hoists 13 to make the middle section rise slightly and connect with the end of the inner part. After the connection is completed, the bottom pad 20 is pulled out, the second support is removed, and the carrying trolley 4 is reset. Replace the pad 20, and then place the third support on the pad 20 (e.g., Figure 8 As shown, the third support includes two second uprights 19. The second uprights 19 have the same structure as the first upright 18, but the height of the second uprights 19 is lower than that of the first upright 18 (details will not be elaborated further). The shell of the hot gas duct assembly is supported by the third support. After the carrying trolley 4 is pushed to the designated position, the height can be finely adjusted by the lifting component so that the shell of the hot gas duct assembly is connected to the cylinder of the pressure vessel. After completion, the pad 20 is pulled out and the third support is removed.

[0034] The operating platform 1 is equipped with a guide rail 5, and the second traveling wheel structure 404 is equipped with a guide structure. The guide rail 5 and the guide structure cooperate to allow the carrying trolley 4 to move along the length of the guide rail 5. Both ends of the guide rail 5 are equipped with stop blocks 8, which are used to restrict the carrying trolley 4 from sliding out of the guide rail 5, thereby improving the safety of the carrying trolley 4 when transporting hot gas duct components.

[0035] By setting two sets of spaced and parallel guide rails 5 on the operating platform 1, one set of guide rails 5 corresponding to the first traveling wheel structure 403 and the other set of guide rails 5 corresponding to the second traveling wheel, the carrying trolley 4 can move along the length direction of the guide rails 5 under the action of the guide structure. In order to facilitate the assembly of the hot gas duct assembly and the core support structure, the guide structure can also be adjusted so that the carrying trolley 4 can move along the width direction of the guide rail, which facilitates the assembly of the hot gas duct assembly.

[0036] The first traveling wheel structure 403 and the second traveling wheel structure 404 have the same structure. Taking the second traveling wheel structure 404 as an example, Figure 3 and Figure 4As shown, the second traveling wheel structure 404 includes a mounting bracket, with a roller rotatably connected to the bottom of the mounting bracket. The length direction of the roller is the same as the width direction of the guide rail 5, and the length of the roller is less than the width of the guide rail 5. The roller rolls along the upper surface of the guide rail 5, and the axial direction of the roller is the same as the width direction of the guide rail 5. The guiding structure includes a connecting plate 405 and a first roller component and a second roller component disposed on both sides of the connecting plate 405. The first roller component and the second roller component have the same structure. Taking the first roller component as an example, the first roller component includes an adjusting bolt 406, a ring 407, a first nut 408, and a second roller component 409. Two nuts 409, and a waist-shaped hole (not shown in the figure) is opened on the connecting plate 405. The length direction of the waist-shaped hole is the same as the width direction of the operating platform 1. The adjusting bolt 406 passes through the ring 407 and the waist-shaped hole in sequence and is screwed to the first nut 408. In order to prevent the first nut 408 from loosening, after the first nut 408 is tightened, a second nut 409 is tightened to improve stability. When the carrying trolley 4 needs to move along the length direction of the guide rail 5, the ring 407 in the first roller component and the ring 407 in the second roller component contact the corresponding side walls of the guide rail 5 respectively.

[0037] By loosening the second nut 409 and the first nut 408 in the first roller assembly and the second roller assembly, the distance between the ring 407 in the first roller assembly and the ring 407 in the second roller assembly is adjusted so that the distance is greater than the width of the guide rail 5. This allows the manual pushing of the carrying trolley 4 to move slightly along its width direction, thereby driving the hot air duct assembly to move and better complete the assembly work.

[0038] Specifically, after the 600MW high-temperature gas duct assembly connection device is arranged in the cabin, the internal components, the middle section cylinder, and the shell of the hot gas duct assembly can be hoisted onto the support assembly on the carrying trolley 4 using a ring crane. The equipment position is adjusted and the carrying trolley 4 is moved to complete the assembly of the internal components and the core support structure, the assembly of the middle section cylinder and its internal components, and the assembly of the hot gas duct shell and the pressure vessel cylinder. After the hot gas duct assembly is installed, the carrying trolley 4 is lifted out using a nuclear island crane (ring crane). The first fastener between the operating platform 1 and the first support structure 2 and the second fastener between the operating platform 1 and the second support structure 3 are removed. The operating platform 1 and the crossbeam support 302 are lifted out, and the bracket 301 is ground off the second embedded part, so that the site can quickly meet the prerequisites for the hoisting of the steam generator.

[0039] It should be noted that, in order to improve the stability of the hot gas duct assembly after it is installed on the pressure vessel, such as... Figure 9 As shown, a fourth support member is connected to the first support structure 2, such as... Figure 9As shown, the fourth support member includes a second base plate 22 bolted to the first support structure 2. A third support 21 is first placed on the second base plate. The height of the third support 21 is the same as the height of the second support 19. After the third support 21 is placed at the bottom of the hot air duct assembly, a pad 20 is inserted between the third support 21 and the second base plate 22 so that the fourth support member can temporarily support the hot air duct assembly.

[0040] In addition, after the operation platform 1 is installed, the operation platform 1 located in the steam generator compartment 10 and the pressure vessel compartment 9 is in a state of being close to the edge. The edge of the pressure vessel compartment 9 is about 5m above the ground, and the edge of the steam generator compartment 10 is about 22m above the ground. Guardrails are installed in the edge areas, and fall protection nets are installed using the crossbeams of the steam generator compartment 10 to prevent workers from falling accidentally.

[0041] Example 2: A method for installing a device for connecting a hot gas duct assembly includes the following steps: Step 1: Embed the first and second embedded parts at the bottom of the installation channel and on the side wall of the steam generator compartment 10, respectively; Step 2: Assemble the operating platform 1, guide rail 5 and first lifting lug 6 off-site. At the same time, assemble the carrying trolley 4 and crossbeam support 302 respectively. Weld the column 201 on the first embedded part and the bracket 301 on the second embedded part. Then, lift the crossbeam support 302 into place through the second lifting lug 7 and fix the crossbeam support 302 and bracket 301. Step 3: The hoist connects to the first lifting lug 6 via the hoisting strap, hoists the operating platform 1 into the installation channel, and fixes one side of the operating platform 1 to the column 201 with the first fastener, and fixes the other side of it to the crossbeam support 302 with the second fastener. Step 4: Hoist the carrying trolley 4 onto the operating platform 1. When it is necessary to assemble the hot air duct internals in the hot air duct assembly, place the pad 20 and the first support member auxiliary support assembly on the carrying trolley 4. When it is necessary to assemble the middle section of the hot gas duct in the hot gas duct assembly, place the pad 20 and the second support on the carrying trolley 4, and assemble them using the lifting assembly. When it is necessary to assemble the hot gas duct shell in the hot gas duct assembly, a third support is installed on the carrier trolley 4, and the hot gas duct shell is assembled with the pressure vessel cylinder using the lifting assembly.

[0042] When a steam generator needs to be installed, the specific steps are as follows: 1) Remove the carrying trolley 4; 2) Remove the crossbeam support component 302; 3) Remove operating platform 1; 4) Cut off the bracket 301 welded on the second embedded part of the wall of the semi-circular area inside the steam generator compartment 10, grind the surface of the second embedded part to a smooth surface and protect it. 5) Install the fourth support component to temporarily support the hot gas duct assembly; 6) After the steam generator is hoisted into place and the hot gas duct assembly is assembled, remove the fourth support, cut off column 201, and smooth and protect the surface of the first embedded part at 0m (the bottom wall of the installation channel).

[0043] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for connecting a hot gas duct assembly, wherein the hot gas duct assembly is installed between a steam generator and a pressure vessel, the steam generator being located in a steam generator compartment (10), the pressure vessel being located in a pressure vessel compartment (9), and an installation channel being provided between the pressure vessel compartment (9) and the steam generator compartment (10), characterized in that, The hot gas duct assembly connection device includes an operating platform (1), a first embedded part, a second embedded part, a first support structure (2), and a second support structure (3). The first embedded part is provided in the installation channel, and the second embedded part is provided on the inner wall of the steam generator compartment (10); The first support structure (2) is connected to the first embedded part, and the second support structure (3) is connected to the second embedded part; The operating platform (1) has a first support structure (2) and a second support structure (3) detachably connected to its bottom sides. The first support structure (2) and the second support structure (3) work together to support and fix the operating platform (1).

2. The device for connecting a hot gas duct assembly according to claim 1, characterized in that, The first support structure (2) includes multiple columns (201), the bottom end of each column (201) is welded to the first embedded part, and the other end is connected to the operating platform (1) through the first fastener.

3. The device for connecting a hot gas duct assembly according to claim 1, characterized in that, The second support structure (3) includes a corbel (301) and a crossbeam support (302); The bracket (301) corresponds one-to-one with the second embedded part, and the bracket (301) is welded to the second embedded part; Each of the brackets (301) is connected to the beam support (302) for fixing the beam support (302). The crossbeam support (302) is connected to the operating platform (1) via a second fastener.

4. The device for connecting a hot gas duct assembly according to claim 1, characterized in that, The operating platform (1) is equipped with a transport mechanism for transporting the hot gas duct assembly.

5. The device for connecting a hot gas duct assembly according to claim 4, characterized in that, The transport mechanism includes a carrying trolley (4) and a support assembly; The carrying trolley (4) includes a base (401), the top of the base (401) is symmetrically provided with a flat plate (402), and the bottom sides are respectively provided with multiple sets of first walking wheel structures (403) and multiple sets of second walking wheel structures (404). The plate (402) is provided with a support assembly for supporting the hot gas duct assembly.

6. The device for connecting a hot gas duct assembly according to claim 5, characterized in that, The hot gas duct assembly connection device further includes a lifting component, and the support component cooperates with the lifting component to dock the hot gas duct assembly with the pressure vessel.

7. The device for connecting a hot gas duct assembly according to claim 5, characterized in that, The operating platform (1) is provided with a guide rail (5), and the second traveling wheel structure (404) is provided with a guide structure. The guide rail (5) and the guide structure cooperate to enable the carrying trolley (4) to move along the length direction of the guide rail (5).

8. The device for connecting a hot gas duct assembly according to claim 3, characterized in that, The operating platform (1) is symmetrically provided with first lifting lugs (6) on both sides, and each of the crossbeam support members (302) is symmetrically provided with second lifting lugs (7).

9. The device for connecting a hot gas duct assembly according to claim 7, characterized in that, Both ends of the guide rail (5) are provided with stop blocks (8), which are used to restrict the trolley (4) from sliding out of the guide rail (5).

10. A method for installing a device for connecting hot gas duct assemblies, characterized in that, Includes the following steps: S1: The hot gas duct assembly is installed between the steam generator and the pressure vessel. The steam generator is located in the steam generator compartment (10), and the pressure vessel is located in the pressure vessel compartment (9). There is an installation channel between the pressure vessel compartment (9) and the steam generator compartment (10). The first embedded part and the second embedded part are pre-embedded in the installation channel and on the side wall of the steam generator compartment (10), respectively. S2: After welding the column (201) on the first embedded part and the bracket (301) on the second embedded part, install the beam support (302). S3: The ring crane connects to the first lifting lug (6) through the lifting strap, lifts the operating platform (1) into the installation channel, and fixes one side of the operating platform (1) to the column (201) through the first fastener, and fixes the other side of it to the beam support (302) through the second fastener. S4: After hoisting the carrier trolley (4) onto the operating platform (1), place the support assembly on the carrier trolley (4).

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