Method for hoisting, hauling and introducing condenser shell and water chamber of steam turbine plant

Abstract

The embodiment of the invention provides a steam turbine plant condenser shell and water chamber hoisting, hauling and introducing method, and relates to the field of steam turbine plant condenser installation. The problems that the installation space is limited and the high-altitude operation risk exists when a water chamber is connected after a shell module is in place are solved. A hauling track is firstly laid, a shell module is hoisted to the hauling track, the shell module is driven to horizontally move to the position under a vertical installation channel to be suspended, water chamber connection is completed through the vertical installation channel close to a hauling platform, high-altitude operation is reduced, and safety and efficiency are improved; and finally, the shell module connected with the water chamber is transferred to an installation position, and through combination of hauling positioning and vertical butt joint installation, it is ensured that a large module is assembled and efficiently placed in place in a narrow space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steam turbine plant condenser installation, in particular to a steam turbine plant condenser shell and water chamber hoisting and towing introduction method. BACKGROUND

[0002] A million kilowatt steam turbine unit is generally designed with two or three condensers, each condenser is composed of two shell modules, the condenser shell is the largest, heaviest and most precise module, the water chamber is installed at both ends of the shell, and the water chamber is connected and fixed with the shell through connecting bolts. The condenser shell is installed below the steam turbine foundation girder, plant structure beam and part of the floor, the hoisting introduction space is small and difficult.

[0003] The prior art has the following problems, the first method, the condenser shell is hoisted from outside the plant, usually a plurality of large mobile cranes are required to lift and hoist into position; the second method, the condenser shell is hoisted from outside the plant by a plurality of large mobile cranes, hoisted to the towing track in the steam turbine plant, and then towed to the position above; the third method, the water chamber is connected and fastened with the shell after the shell module is positioned. The first and second methods not only have high cost, but also are severely restricted by the working space outside the plant and weather conditions, and the construction window is limited. The third method, the water chamber is connected and fastened with the shell after the shell module is positioned, the installation of the water chamber is carried out in the limited space below the steam turbine foundation girder, which is high-altitude and edge work, a large number of scaffolding platforms need to be erected, the construction has high safety risk, low efficiency and poor quality guarantee. SUMMARY

[0004] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0005] The purpose of the present application includes, for example, providing a steam turbine plant condenser shell and water chamber hoisting and towing introduction method, which can improve the connection of the water chamber after the shell module is positioned, and solve the problems of limited installation space and high-altitude operation risk.

[0006] Embodiments of the present application can be implemented as follows: The embodiment of the present application provides a steam turbine plant condenser shell and water chamber hoisting, towing, introducing and installing method, the condenser comprises at least one shell module, and the method comprises the following steps: laying a towing track above a condenser installation position of a condenser installation layer; hoisting and placing a condenser shell module on the towing track; driving the shell module to move horizontally on the towing track, and pausing the movement when the end of the shell module moves to directly below a preset vertical installation channel in the plant; hoisting a water chamber through the vertical installation channel, and connecting and fixing the water chamber with the end of the shell module directly below the vertical installation channel; transferring the shell module connected with the water chamber from the towing track and placing the shell module in the condenser installation position.

[0007] In addition, the steam turbine plant condenser shell and water chamber hoisting, towing, introducing and installing method provided by the embodiment of the present application can further have the following additional technical features: Optionally, the step of hoisting and placing the condenser shell module on the towing track comprises the following steps: moving the shell module along an unobstructed space in the plant to directly above a vertical transfer channel above an area or an extended area of the towing track by using a plant crane, vertically descending and passing through the vertical transfer channel, rotating a set angle to make the length direction of the shell module parallel to the towing track, and hoisting and placing the shell module on the towing track.

[0008] Optionally, the vertical installation channel is a low-pressure cylinder installation space reserved on a steam turbine foundation; and the vertical transfer channel is a space between an edge of the steam turbine foundation and a plant column, and the unobstructed space in the plant is located on a steam turbine operation layer.

[0009] Optionally, a projection of the vertical transfer channel in a vertical direction overlaps at least one end area of the towing track.

[0010] Optionally, the condenser comprises a first shell module and a second shell module; the method sequentially performs the step of hoisting and placing the condenser shell module on the towing track on the first shell module and the second shell module, and comprises the following steps: after the first shell module performs the step of connecting and fixing at least one water chamber through the vertical installation channel, and in the case that the first shell module continues to move along the towing track to leave a track-off position for the second shell module, hoisting the second shell module to the track-off position of the towing track through the vertical transfer channel.

[0011] Optionally, the method further comprises: after hoisting the second shell module to the falling rail position, driving the second shell module to move reversely relative to the first shell module on the hauling rail to form a working space between the first shell module and the second shell module for water chamber hoisting operation; then hoisting and installing a water chamber through the vertical installation passage at one end of the first shell module which is not installed with water chamber in the working space.

[0012] Optionally, the method further comprises: after the first shell module completes installation of water chambers at both ends, hoisting the first shell module which completes installation of water chambers at both ends as a whole from the hauling rail and hoisting to a first temporary support arranged at a first condenser installation position corresponding to the first shell module, the first condenser installation position corresponding to the first shell module is arranged adjacent and side by side with a second condenser installation position corresponding to the second shell module, and the hauling rail is laid above the second condenser installation position corresponding to the second shell module.

[0013] Optionally, the method further comprises: after hoisting the first shell module which completes installation of water chambers at both ends from the hauling rail, driving the second shell module to move to the vertical installation passage one by one in sequence and completing installation of water chambers at both ends of the second shell module; and hauling the second shell module which completes installation of water chambers at both ends along the hauling rail to above the second condenser installation position corresponding to the second shell module.

[0014] Optionally, the method further comprises: jacking up or hoisting the second shell module which is located above the second condenser installation position corresponding to the second shell module and completes installation of water chambers at both ends, removing the hauling rail below the second shell module, and then lowering and placing the second shell module on a second temporary support arranged at the second condenser installation position corresponding to the second shell module; wherein the top surface height of the first temporary support and the second temporary support is lower than the rail surface height of the hauling rail, and the group butt welding interface of the first shell module placed on the first temporary support and the second shell module placed on the second temporary support is at the same horizontal height suitable for welding.

[0015] Optionally, the method further comprises: group butt welding the first shell module which completes installation of water chambers and is supported on the first temporary support and the second shell module which completes installation of water chambers and is supported on the second temporary support to form an integral module; synchronously jacking up the integral module using a hydraulic jack system, removing the first temporary support and the second temporary support, and then lowering and fixing the integral module on the condenser installation positions of the first shell module and the second shell module respectively.

[0016] Optionally, the device for driving the shell module to move horizontally on the haulage track is an electric hoist or a hydraulic pusher.

[0017] The steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method has the following advantages, for example: The steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method can effectively avoid the collision risk caused by the limited space in the traditional hoisting, improve the construction safety, and shorten the construction period by laying a haulage track above the condenser installation layer, moving the shell module horizontally using the haulage track, pausing when the end of the shell module moves to the vertical installation channel, hoisting the water chamber through the channel, and connecting and fixing the water chamber with the shell module. The modular assembly is realized by using the vertical space of the plant, the amount of high-altitude work is reduced, and the construction period is shortened. Finally, the shell module connected with the water chamber is transferred to the installation position, the high-altitude work is avoided, and the construction efficiency and equipment installation accuracy are improved by the coordinated work of the modular combination and the haulage track transportation. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above features and advantages of the present application can be better understood by reading the following detailed description of embodiments of the present application in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components of similar or identical related function or features can have the same or similar reference label.

[0019] Figure 1 The elevation view of the haulage track of the steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method provided by the embodiments of the present application is shown in the figure. Figure 2 The local enlarged view of the elevation of the haulage track of the steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method provided by the embodiments of the present application is shown in the figure. Figure 3 The plan view of the haulage track of the steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method provided by the embodiments of the present application is shown in the figure. Figure 4 The hoisting route schematic diagram of the steam turbine operation layer of the steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method provided by the embodiments of the present application is shown in the figure. Figure 5 The rotation schematic diagram of the first shell module of the steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method provided by the embodiments of the present application after passing through the vertical transfer channel is shown in the figure. Figure 6 The schematic diagram of the first shell module of the steam turbine plant condenser shell and water chamber hoisting, hauling, and introducing method provided by the embodiments of the present application moving to the vertical installation channel below the haulage track is shown in the figure. Figure 7The first shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is hoisted and installed by a vertical installation track at one end; Figure 8 The first shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is hoisted and installed by a vertical installation track at one end; Figure 9 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 10 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 11 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 12 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 13 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 14 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 15 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 16 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 17 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel; Figure 18 The second shell module of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment of the present application is rotated after passing through a vertical transfer channel.

[0020] Figure: Turbine plant-10; hoisting opening-20; shell module-100; first shell module-110; second shell module-120; water chamber-200; turbine operation layer-300; unobstructed space in the plant-301; turbine foundation layer-310; vertical installation passage-311; vertical transfer passage-312; condenser installation layer-320; towing track-321; falling track position-322; towing small tank-323; condenser foundation layer-330; condenser installation position-331; first condenser installation position-332; second condenser installation position-333; plant crane-400; working space-410; first temporary support-500; second temporary support-510; electric hoist-600. DETAILED DESCRIPTION

[0021] The application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be understood as limiting the scope of protection of the application.

[0022] In the description of the application, it should be noted that if the terms "upper", "lower", "inner", "outer", "vertical" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the application is usually placed, and not indicating or implying that the device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as limiting the application.

[0023] At the same time, it should be noted that if the terms "first", "second" and the like are used only for differentiation description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the application, it should also be noted that unless otherwise explicitly specified or limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, integrally connected, or detachably connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the connection between two elements inside, etc. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0025] The following will be described in detail Figures 1 to 18 The turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment will be described in detail.

[0026] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 ,Figure 7 and Figure 8 Embodiments of the present application provide a steam turbine plant condenser shell and water chamber hoisting, towing and introducing method. The condenser comprises at least one shell module 100, comprising the following steps: Step S1, laying a towing track 321 above the condenser installation position 331 of the condenser installation layer 320; Step S2, hoisting and setting the condenser shell module 100 on the towing track 321; Step S3, driving the shell module 100 to move horizontally on the towing track 321, and pausing the movement when the end of the shell module 100 moves to the position directly below the pre-set vertical installation passage 311 in the plant; Step S4, hoisting down the water chamber 200 through the vertical installation passage 311, and connecting and fixing the water chamber 200 with the end of the shell module 100 paused directly below the vertical installation passage 311; Step S5, transferring and placing the shell module 100 connected with the water chamber 200 from the towing track 321 to the condenser installation position 331.

[0027] It should be noted that in the steam turbine plant 10, the steam turbine operation layer 300, the steam turbine foundation layer 310, the condenser installation layer 320 and the condenser foundation layer 330 are arranged from top to bottom, wherein the steam turbine foundation layer 310 is partially embedded in the space of the condenser installation layer 320, and the condenser is installed below the steam turbine foundation layer 310. Specifically, the steam turbine operation layer 300 is located in a space above the 9th floor. The condenser installation layer 320 is a space of the -9.5th floor.

[0028] By laying the towing track 321 on the condenser installation layer 320, the shell module 100 is introduced into the appropriate position in the plant by horizontal movement, and then the water chamber 200 is installed through the vertical installation passage 311, and finally transferred and placed. The water chamber 200 installation process is advanced from the traditional "after final positioning" to "during the track towing process", and the operation is carried out by using the vertical installation passage 311, which avoids high-altitude installation in a narrow final position, can efficiently introduce and install the condenser shell and water chamber 200 to the specified position, reduces the problems of space limitation and operation inconvenience that may occur in the traditional installation method, and improves the installation efficiency and installation safety.

[0029] Referring to Figure 4In this embodiment, in step S2, hoisting and placing the condenser shell module 100 on the towing track 321 includes: in step S21, using the factory building crane 400 to move the shell module 100 along the unobstructed space 301 in the factory building to above the vertical transfer channel 312 in the area or extended area of the towing track 321, vertically descending and passing through the vertical transfer channel 312, rotating a set angle, making the length direction of the shell module 100 parallel to the towing track 321, and hoisting and placing on the towing track 321.

[0030] Using the factory building crane, a large external crane is not needed. After hoisting the shell module 100 into the hoisting opening 20, hoisting the shell module 100 along the unobstructed space 301 in the factory building, horizontally moving to the position of the vertical transfer channel 312, rotating a set angle after descending and passing through the vertical transfer channel, then corresponding to the extension direction of the towing track 321, and then placing the shell module 100 on the towing track. The vertical transfer channel connects the unobstructed space 301 in the factory building and the condenser installation layer 320, and the shell module 100 descends to the condenser installation layer 320 through the vertical transfer channel 312. By using the factory building crane 400 and the vertical transfer channel 312, through vertical descent and rotation operation, it is ensured that the shell module 100 can be smoothly positioned, and the safe and rapid transfer problem of the shell from the hoisting opening 20 to the towing track 321 in the dense factory building structure is solved.

[0031] Specifically, the unobstructed space 301 in the factory building can form the moving route of the shell module 100, such as the hoisting route 1 and the hoisting route 2 in Figure 4 . The obstacles affecting the hoisting of the shell on the hoisting route are cleaned in advance, and the specific route can be selected according to the actual situation. Specifically, referring to Figure 4 and Figure 5 , the first shell module 110 is transported to the hoisting opening 20 on the 0m floor of the factory building, and the hoisting cable is connected to the hoisting lug of the shell transport bracket through the factory building crane. The first shell module 110 is hoisted from the factory building by the crane, hoisted to the 9m floor and related obstacles, and hoisted to the 5~7 shaft and A~1 / A shaft by the factory building crane according to the hoisting route. The shell module 100 is slowly rotated and moved by the crane from the steam turbine operation layer 300 to the -9.5m floor (ensuring that the shell and the hoisting cable are below the steam turbine base beam). Referring to Figure 5 , after the shell B is rotated by 90°, the position is adjusted, and hoisted to the towing small tank 323 of the towing track 321.

[0032] Referring to Figure 4 , Figure 5 and Figure 6In the embodiment, the vertical installation channel 311 is a low-pressure cylinder installation space reserved on the steam turbine foundation; the vertical transfer channel 312 is a space between the edge of the steam turbine foundation and the workshop column, and the unobstructed space 301 in the workshop is located on the steam turbine operation layer 300.

[0033] Specifically, the height positions of the unobstructed space 301 in the workshop, the vertical transfer channel 312, and the towing track 321 from top to bottom are as follows: the height positions of the vertical transfer channel 312 and the vertical installation channel 311 are almost the same, but they are at different plane positions.

[0034] After the shell module 100 is hoisted into the workshop from the hoisting opening 20 by the workshop travelling crane 400, it is lifted to the unobstructed space on the steam turbine operation layer 300, then moved horizontally above the vertical transfer channel 312, and then lowered along the vertical transfer channel 312 to the condenser installation layer 320, and rotated to correspond to the towing track 321. Then, when the shell module 100 is moved to the end of the towing track 321 and corresponds to the vertical installation channel 311, the water chamber 200 can be installed.

[0035] Specifically, the vertical transfer channel 312 is between the 105-7 axis and the A-1 / A axis of the steam turbine workshop 100 in the figure. Figure 6 As shown, the shell is towed to the installation position by connecting the hoisting gear and the electric hoist 600 (or the hand-operated hoist) with the pre-buried hoisting points and the hoisting points on the shell transportation bracket. The shell is towed to one end below the low-pressure cylinder port of the steam turbine, and the water chamber 200 is hoisted by the cylinder travelling crane in the workshop to be connected with the shell. After the first shell module 110 is connected with the water chamber 200 at one end, the shell continues to be towed into the workshop.

[0036] Referring to Figure 5 In the embodiment, the projection of the vertical transfer channel 312 in the vertical direction overlaps at least one end region of the towing track 321.

[0037] The shell module 100 lowered from the transfer channel can correspond to the towing track 321 exactly after rotation, connecting the two links of “hoisting” and “towing”, so that the shell module 100 can be conveniently placed at the end of the towing track 321 after being lowered through the vertical transfer channel 312, reducing the moving distance and operation difficulty in the transfer process, improving the transfer efficiency, and ensuring that the shell module 100 can be accurately placed on the towing track 321 to start the subsequent moving operation.

[0038] Referring to Figure 9 and Figure 10 In the embodiment, the condenser includes a first shell module 110 and a second shell module 120; the method sequentially performs the steps of hoisting and setting the condenser shell module 100 on the towing track 321 on the first shell module 110 and the second shell module 120, including: After the first shell module 110 completes the step of connecting and fixing the at least one water chamber 200 through the vertical installation channel 311, and in the case that the first shell module 110 continues to move along the towing track 321 to give out the off-track position 322 for the second shell module 120 to use, the second shell module 120 is hoisted onto the off-track position 322 of the towing track 321 through the vertical transfer channel 312.

[0039] The "off-track position 322" is the position on the towing track 321 corresponding to the shell module 100 after descending and rotating through the vertical transfer channel. After the first shell module 110 installs the water chamber 200 at one end, it moves along the towing track 321 until the other end corresponds to the vertical installation channel 311. At this time, if the installation of the water chamber 200 is performed, the second shell module 120 cannot be directly lowered onto the off-track position 322 after rotating, therefore, the first shell module 110 lowers the second shell module 120 onto the off-track position 322 after completing the installation of the water chamber 200 at one end.

[0040] The movement of the first shell module 110 gives out space, so that the second shell module 120 can be smoothly hoisted onto the towing track 321, avoiding interference between the two shell modules 100 during hoisting, ensuring that the hoisting process is orderly and improving the overall installation efficiency.

[0041] With reference to Figure 11 and Figure 12 In this embodiment, the method further comprises: after hoisting the second shell module 120 onto the off-track position 322, driving the second shell module 120 to move reversely relative to the first shell module 110 on the towing track 321 to form a working space 410 for the hoisting operation of the water chamber 200 between the first shell module 110 and the second shell module 120; and then, hoisting and installing the water chamber 200 through the vertical installation channel 311 at the end of the first shell module 110 which does not install the water chamber 200 in the working space 410.

[0042] After the second shell module 120 is lowered onto the off-track position 322, the space between the second shell module 120 and the first shell module 110 is insufficient for installing the water chamber 200 at one end of the first shell module 110. At this time, by reversely moving the second shell module 120, the space at the end of the first shell module 110 close to the second shell module 120 is increased, so that the installation of the water chamber 200 at one end of the first shell module 110 can be performed.

[0043] The space interference problem of the two shell modules 100 side by side on the towing track 321 is solved. Through the reverse movement of the second shell module 120, a safe operation window is created, so that the installation of the second end water chamber 200 for the first module is possible within the limited length of the towing track 321. The problem of difficult or impossible operation due to narrow space is avoided, the accuracy and efficiency of the water chamber 200 installation are improved, and the subsequent water chamber 200 installation step of the first shell module 110 is reasonably arranged, so that the whole installation process is more compact and reasonable.

[0044] With reference to Figure 12 and Figure 13 In the embodiment, the method further comprises: after the first shell module 110 completes the installation of the water chamber 200 at both ends, the first shell module 110 that completes the installation of the water chamber 200 at both ends is lifted off the towing track 321 and hoisted onto the first temporary support 500 arranged at the first condenser installation position 332 corresponding to the first shell module 110, the first condenser installation position 332 corresponding to the first shell module 110 is arranged adjacent and side by side with the second condenser installation position 333 corresponding to the second shell module 120, and the towing track 321 is laid above the second condenser installation position 333 corresponding to the second shell module 120.

[0045] Lifting the first shell module 110 that completes the installation of the water chamber 200 off the towing track 321 creates space for subsequent operations of the second shell module 120, and placing it on the first temporary support 500 prepares for subsequent operations such as assembly and welding of the two shell modules 100, reasonably arranges the installation position and sequence, and orderly advances the whole installation process, reducing the mutual influence between steps.

[0046] With reference to Figure 13 , Figure 14 , Figure 15 and Figure 16 In the embodiment, the method further comprises: after the first shell module 110 that completes the installation of the water chamber 200 at both ends is lifted off the towing track 321, the two ends of the second shell module 120 are driven to move to the directly below the vertical installation channel 311 in turn, and the installation of the water chamber 200 at both ends of the second shell module 120 is completed; and the second shell module 120 that completes the installation of the water chamber 200 at both ends is towed along the towing track 321 to the directly above the second condenser installation position 333 corresponding to the second shell module 120.

[0047] The towing track 321 that has been cleared is used to efficiently and non-interferingly complete the assembly of the water chamber 200 of the second shell module 120, and the towing track 321 is used to accurately deliver it to the above of the final landing point, embodying the functions of movement assembly and delivery of the towing track 321.

[0048] With reference to Figure 17 andFigure 18 In the embodiment, the method further comprises: lifting or hoisting the second shell module 120 which is located directly above the second condenser installation position 333 corresponding to the second shell module 120 and has completed the installation of the two-end water chamber 200, removing the haulage track 321 below the second shell module 120, and then lowering and placing the second shell module 120 on the second temporary support 510 arranged on the second condenser installation position 333 corresponding to the second shell module 120; wherein the top surface height of the first temporary support 500 and the second temporary support 510 is lower than the rail surface height of the haulage track 321, and the group joint welding interface of the first shell module 110 placed on the first temporary support 500 and the second shell module 120 placed on the second temporary support 510 is at the same horizontal height suitable for welding.

[0049] The first shell module 110 is supported on the first temporary support 500 arranged on the first condenser installation position 332 corresponding to the first shell module 110, and the second shell module is supported on the second temporary support 510 arranged on the second condenser installation position 333 corresponding to the second shell module 120, so that the two shell modules can be at the same horizontal height and be welded in group.

[0050] The temporary support height lower than the track facilitates the removal of the track, and the interface level ensures that the two modules of hundreds of tons can be smoothly connected and welded at the ground level, thereby reducing the difficulty and risk of group connection.

[0051] In the embodiment, the method further comprises: welding the first shell module 110 supported on the first temporary support 500 and having completed the installation of the water chamber 200 and the second shell module 120 supported on the second temporary support 510 and having completed the installation of the water chamber 200 in group, to form an integral module; using a hydraulic jack system to synchronously lift the integral module, remove the first temporary support 500 and the second temporary support 510, and then lower and fix the integral module on the condenser installation positions 331 of the first shell module 110 and the second shell module 120 respectively.

[0052] The two shell modules 100 are welded in group to form an integral module, which enhances the integrity and stability of the condenser. Through the synchronous lifting and lowering operation of the hydraulic jack system, the position of the integral module can be accurately controlled, the installation precision and quality are improved, and the normal operation of the condenser is ensured.

[0053] Referring to Figure 6 In the embodiment, the device for driving the shell module 100 to move horizontally on the haulage track 321 is an electric hoist 600 or a hydraulic pusher.

[0054] The electric hoist 600 or the hydraulic pusher is selected as the driving device, both of which have the advantages of convenient operation, high control precision and stable driving force, can effectively drive the shell module 100 to move horizontally on the towing track 321, meet the requirement of the movement of the shell module 100 in the installation process, and improve the stability and reliability of the installation process.

[0055] According to the steam turbine plant condenser shell and water chamber hoisting and towing introduction method provided by the embodiment, the working principle of the steam turbine plant condenser shell and water chamber hoisting and towing introduction method comprises: The shell module 100 is hoisted from the plant, the crane in the plant is effectively utilized, the shell is unloaded and hoisted, the cost of large mobile crane is saved, the shell introduction is avoided from being affected by the crane outside the plant and the working surface.

[0056] Specifically, 1, condenser foundation components are installed. 2, Since each condenser is composed of two shells, which are referred to as shell A and shell B, a towing track 321 is installed above the in-place position of shell A or shell B, and a shell towing tractor 323 and a shell towing traction (or pushing) device are arranged, which are described by taking the installation of the towing track 321 on shell A as an example. 3, A first temporary support 500 is arranged at the shell B in-place area to temporarily support shell B when shell B is in place. 4, Shell B is hoisted by a crane in the steam turbine plant 10. 5, Shell B is hoisted onto the towing tank 323 of the track. 6, Shell B is moved horizontally to a position under the steam turbine foundation beam by the traction or pushing device; 7, by the crane in the plant, the water chamber 200 at the corresponding end of the steam turbine foundation beam is hoisted, and the water chamber 200 is hoisted to the corresponding installation position of the shell. 8, the water chamber 200 is fixed to shell B by connecting bolts. 9, by the traction or pushing device, shell B and water chamber 200 are moved horizontally to the position above the in-place position of shell A. 10, by the crane in the plant, the water chamber 200 at the other end of shell B is hoisted, and the water chamber 200 is hoisted to the corresponding installation position of the shell. 11, the water chamber 200 is fixed to shell B by connecting bolts. 12, by the crane in the plant, shell B and its front and rear water chambers 200 are hoisted to the in-place position of shell B. 13, similarly, refer to steps 3 to 10 to introduce shell A and its front and rear water chambers 200. 14, by the crane in the plant, shell A and its front and rear water chambers 200 are hoisted to a certain height. 15, the track under shell A is removed. 16, shell A and shell B are butt welded. 17, by the hydraulic jack system, shell A and shell B are lifted, and the shell transportation drag rack and steel structure support are removed. 18, by the hydraulic jack system, shell A and shell B are lowered to the foundation components as a whole. The water chambers 200 at both ends of shell A in this embodiment are hoisted off the towing track 321 after the water chambers 200 at both ends of shell B are installed, which is different from the above embodiment, in which the water chamber 200 at one end of shell B is installed first, and then the water chamber 200 at the other end of shell B is installed after shell A is hoisted onto the towing track 321. Both methods are within the scope of protection of the present application.

[0057] Figures 1 to 18, which illustrates the embodiment of first installing the water chamber 200 at one end of the shell B, and then installing the water chamber 200 at the other end of the shell B after the shell A is hoisted onto the towing track 321. First, lay the towing track 321 above the condenser installation position 331. Through the factory building travelling crane 400, hoist the first shell module 110 to the steam turbine operation layer 300, and then lower and rotate 90 degrees through the vertical transfer channel 312 to fall on the towing track 321. Drive the movement, and pause when the one end moves to the position directly below the low-pressure cylinder port (vertical installation channel 311). Hoist and fix the first water chamber 200 through the port. Then, move the first shell module 110 to create a channel, so that the second shell module 120 can be hoisted onto the track in the same way. Move the two modules in the opposite direction on the towing track 321 to create a working space 410, and then complete the installation of the water chamber 200 at the other end of the first shell module 110. Then, hoist the first shell module 110 with the completed double water chamber 200 installation away from the towing track 321, and place it on the temporary support at the installation position. Then, complete the installation of the water chamber 200 at both ends of the second shell module 120 on the emptied towing track 321, and tow it to the position directly above the installation position, lift it up, remove the towing track 321 below it, and then lower it to the temporary support. Finally, the two modules are assembled and welded together, and are synchronously lifted up using hydraulic jacks. After removing all temporary supports, the whole is lowered and fixed on the permanent foundation.

[0058] The condenser shell and water chamber hoisting and towing introduction method provided by the embodiment has at least the following advantages: By moving the water chamber 200 installation process from the traditional high-altitude, narrow final pit position to the open area during the track towing process, the limited space operation with high risk is avoided, and the safety risk is reduced.

[0059] The inherent travelling crane in the factory building is used for hoisting and introduction, which saves the expensive rental fee of large mobile cranes, and reduces the need for additional civil measures such as factory building external wall reservation and ground reinforcement.

[0060] The single-track double-module flow line scheduling is adopted, so that the shell hoisting, water chamber 200 installation, module transfer and other links are closely connected and cross-linked, and the overall construction period is shortened.

[0061] Through the leveling design of the temporary support, and finally using the hydraulic jack system for synchronous whole lifting and lowering, the stable positioning of thousands of tons of heavy objects for welding is realized, and the welding quality is guaranteed.

[0062] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A method for hoisting and transporting the condenser shell and water chamber into a steam turbine plant, wherein the condenser includes at least one shell module, characterized in that... Includes the following steps: A transport track is laid above the condenser installation location on the condenser installation layer; The condenser shell module is hoisted and placed on the transport track; The housing module is driven to move horizontally on the towing track, and the movement is paused when the end of the housing module moves directly below the preset vertical installation channel inside the factory. The water chamber is lowered through the vertical mounting channel and then connected and fixed to the end of the housing module, which is suspended directly below the vertical mounting channel. The housing module with the water chamber connected is transferred from the transport track and placed at the condenser installation location.

2. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 1, characterized in that, The step of hoisting and placing the condenser shell module on the transport track includes: using a plant crane to move the shell module along the unobstructed space in the plant to the vertical transfer channel above the area where the transport track is located or the extended area, descending vertically and passing through the vertical transfer channel, rotating it by a set angle so that the length direction of the shell module is parallel to the transport track, and hoisting it onto the transport track.

3. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 2, characterized in that, The vertical installation channel is the low-pressure cylinder installation space reserved on the turbine foundation; the vertical transfer channel is the space between the edge of the turbine foundation and the factory building column; the unobstructed space in the factory building is located on the turbine operating floor.

4. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 3, characterized in that, The projection of the vertical transfer channel in the vertical direction overlaps with at least one end region of the towing track.

5. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 3, characterized in that, The condenser includes a first shell module and a second shell module; the method sequentially performs the step of hoisting the condenser shell module and placing it on the transport track on the first shell module and the second shell module, including: After the first housing module completes the step of connecting and fixing at least one water chamber through the vertical installation channel, and while the first housing module continues to move along the transport track to make room for the second housing module to drop onto the track, the second housing module is hoisted onto the drop position of the transport track through the vertical transfer channel.

6. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 5, characterized in that, The method further includes: After the second housing module is hoisted to the drop rail position, the second housing module is driven to move in the opposite direction to the first housing module on the towing rail, so as to form a working space between the first housing module and the second housing module for the water chamber hoisting operation; then, the water chamber is hoisted and installed on the end of the first housing module that does not have the water chamber installed through the vertical installation channel in the working space.

7. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 6, characterized in that, The method further includes: After the first housing module completes the installation of the water chambers at both ends, the first housing module with the completed installation of the water chambers at both ends is lifted off the towing track as a whole and hoisted onto the first temporary support set at the first condenser installation position corresponding to the first housing module. The first condenser installation position corresponding to the first housing module and the second condenser installation position corresponding to the second housing module are arranged adjacent to each other and side by side. The towing track is laid above the second condenser installation position corresponding to the second housing module.

8. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 7, characterized in that, The method further includes: After the first housing module with the water chambers at both ends installed is lifted off the towing track, the two ends of the second housing module are driven to move sequentially to directly below the vertical installation channel, and the installation of the water chambers at both ends of the second housing module is completed. The second housing module, with both water chambers installed, is towed along the towing track to the location directly above the second condenser installation position corresponding to the second housing module.

9. The method for hoisting, towing, and introducing the condenser shell and water chamber into the turbine building according to claim 8, characterized in that, The method further includes: The second housing module, which is located directly above the second condenser installation position corresponding to the second housing module and has completed the installation of the water chambers at both ends, is lifted or hoisted up. The towing rail below the second housing module is removed. The second housing module is then lowered and placed on the second temporary support set at the second condenser installation position corresponding to the second housing module. The top surfaces of both the first and second temporary supports are lower than the rail surface of the towing track, and the welding joints of the first housing module placed on the first temporary support and the second housing module placed on the second temporary support are at the same horizontal height suitable for welding.

10. The method for hoisting, towing, and introducing the condenser shell and water chamber of a steam turbine plant according to claim 9, characterized in that, The method further includes: The first shell module, which is supported on the first temporary support and has completed the water chamber installation, and the second shell module, which is supported on the second temporary support and has completed the water chamber installation, are assembled and welded together to form an integral module. The overall module is lifted synchronously using a hydraulic jack system. The first temporary support and the second temporary support are removed. The overall module is then lowered and fixed to the respective condenser installation positions of the first shell module and the second shell module.

11. The method for hoisting, towing, and introducing the condenser shell and water chamber of a steam turbine plant according to any one of claims 1-10, characterized in that, The device that drives the housing module to move horizontally on the transport track is an electric hoist or a hydraulic pusher.

Images