Flexible connection field installation method for million-kilowatt steam turbine generator unit

Abstract

The invention discloses a million-kilowatt steam turbine generator unit flexible connection field installation method, belongs to the field of generator stator field installation, and utilizes a flexible connection sample plate and an outgoing line joint sample plate to replace flexible connection, sleeve joint assembly and connection copper bar actual assembly. In order to solve the problems of large installation hidden danger, low installation efficiency and difficult deformation control of the flexible connection part, the main technical scheme of the invention is that the flexible connection part is free from installation hidden danger such as stress deformation by utilizing the step-by-step reverse fitting from one side of an outgoing line terminal, and the flexible connection part can be installed more stably by setting a reasonable installation sequence, installation process parameters and other measures. Installation quality is remarkably improved, installation hidden dangers caused by the fact that all flexible connection parts cannot be aligned can be effectively controlled, installation and forming are attractive and practical, and accident hidden danger defects are avoided.

Description

Technical Field

[0001] The invention belongs to the field of generator stator installation, and in particular relates to a method for on-site flexible connection installation of a million-kilowatt steam turbine generator set. Background Art

[0002] The million-kilowatt steam turbine generator uses bolts to connect the flexible connection to the upper and lower copper bars in the outlet box. The upper copper bar is connected to the parallel ring lead, and the lower copper bar is connected to the bushing joint assembled on the outlet terminal. The parallel ring lead of the million-kilowatt steam turbine generator is designed with a transition lead, the assembly relationship is relatively complex, and the assembly error is large. If the flexible connection cannot be assembled correctly, it will cause the flexible connection to be installed in an unnatural state and be in an abnormal stress state. If the unit operates under this condition for a long time, it will cause serious quality accidents. Summary of the invention

[0003] The present invention provides a method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection, which is implemented by the following steps:

[0004] S1. Preparation: Clean the inside of the outlet box, the silver-plated surface of the stator and ring leads, the silver-plated surface of the outlet bushing, the upper connecting copper bar, and the outer surface of the lower connecting copper bar, and remove the debris and oil stains on the silver-plated surface of the stator and ring leads, the silver-plated surface of the outlet bushing, the upper connecting copper bar, and the lower connecting copper bar;

[0005] S2. Install the upper copper bar: according to the torque requirements in the drawing, use bolts to fix the upper copper bar to the stator and connect the lead wires on the silver-plated surface;

[0006] S3. Install the flexible connection sample: install the upper part of the flexible connection sample and the upper part of the flexible connection sample gasket on the upper connection copper bar, first use the positioning pin A and positioning pin B for positioning, and then tighten the tool screw A and tool nut A between the upper connection copper bar, the upper part of the flexible connection sample, and the upper part of the flexible connection sample gasket. The combined torque of the tool screw A and tool nut A between the upper connection copper bar, the upper part of the flexible connection sample, and the upper part of the flexible connection sample gasket is the same as the installation torque of the product screws and product nuts for fixing the flexible connection;

[0007] S4. Loosen the bolts for assembling the casing joint: install the casing joint assembly support block: arrange the casing joint assembly support block on the outer circle of the outlet casing, and adjust it through the gasket A so that the height of the four sides of the casing joint assembly support block is H, loosen the bolts for assembling the casing joint, so that the casing joint assembly support block supports the casing joint assembly;

[0008] S5. Install the lower connection copper bar: Use the wooden square and gasket B to hold and adjust the position of the lower connection copper bar, install the lower connection copper bar under the gasket of the flexible connection template and the lower part of the flexible connection template, and close the tool screw B and tool nut B between the flexible connection template, the lower connection copper bar, and the gasket of the flexible connection template; first use the positioning pin C and positioning pin D for positioning, and then close the tool screw B and tool nut B between the lower connection copper bar, the lower part of the gasket of the flexible connection template, and the lower part of the flexible connection template;

[0009] S6. Adjust the position of the sleeve joint assembly and the lower connecting copper bar: Use a jack to adjust the sleeve joint assembly angle in the circumferential direction so that the sleeve joint assembly contacts the lower connecting copper bar, and the contact area must reach more than 95%;

[0010] S7. Preparation work before marking the lower connecting copper bar: assemble the sleeve joint assembly bolts according to the drawing torque, and remove the sleeve joint assembly support block and gasket A;

[0011] S8. Marking of the lower connecting copper bar: The material of the outlet connector sample is Q235. The position of the handle hole of the outlet connector sample is the same as the position of the handle hole of the sleeve connector assembly. Draw two vertical edges of the sleeve connector assembly on the lower connecting copper bar;

[0012] S9, remove the lower connecting copper bar, wooden square, gasket B and jack;

[0013] S10, arranging and processing the lower connecting copper bar: aligning the right-angled side of the outlet connector template with the two vertical sides on the lower connecting copper bar, and processing the engaging hole for assembling the lower connecting copper bar and the sleeve connector to obtain the processed lower connecting copper bar;

[0014] S11. Preparation work before formal installation of the processed lower connecting copper bar: Use wooden square and gasket B to support and adjust the position of the processed lower connecting copper bar. On the non-outlet bushing side of the processed lower connecting copper bar, first use positioning pins C and positioning pins D to position the processed lower connecting copper bar, the lower part of the flexible connection template, and the lower part of the flexible connection template gasket. Then, close and fix the flexible connection template, the processed lower connecting copper bar, and the flexible connection template gasket with tool screws B and tool nuts B.

[0015] S12. Installation of the outlet bushing side of the processed lower copper busbar: Assemble the processed lower copper busbar and the bushing joint; remove the flexible connection template, the flexible connection template gasket, the positioning pin A, the positioning pin B, the tool screw A, the tool nut A, the positioning pin C, the positioning pin D, the tool screw B and the tool nut B;

[0016] S13. Formal installation of flexible connection: The flexible connection is installed from top to bottom. The flexible connection and the upper connection copper bar are fixed with product screws and product nuts. The flexible connection, the clamping plate and the processed lower connection copper bar are fixed with product screws and product nuts. After fixing, remove the jack, wooden square and gasket B supported under the fixed flexible connection sample;

[0017] S14. Inspection and finishing of flexible connection status: Use a feeler gauge to check the arc top of the flexible connection. If it meets the requirements, tighten the product nut according to the torque required by the drawing and clean the inside of the outlet box.

[0018] In the above-mentioned method for on-site installation of the flexible connection of the million-kilowatt steam turbine generator set, the engaging hole between the lower connecting copper bar in S1 and the flexible connection side is a pre-processed waist-round hole.

[0019] In the above-mentioned flexible connection on-site installation method for the million-kilowatt steam turbine generator set, after the upper connecting copper bar in S2 is fixed to the stator and the silver-plated surface of the lead wire is connected, the gap between the two mating surfaces is measured with a feeler gauge, and the gap value is less than 0.02mm.

[0020] In the above-mentioned method for on-site installation of flexible connection of a million-kilowatt steam turbine generator set, in S3, positioning pins A and positioning pins B are diagonally installed on the upper connecting copper bus, the upper part of the flexible connection template and the upper part of the flexible connection template gasket.

[0021] In the above-mentioned on-site installation method of flexible connection of million-kilowatt steam turbine generator set, the material of the flexible connection template in S3 is Q235B, and the coupling hole of the flexible connection template is divided into upper and lower parts, which respectively correspond to the coupling hole of the flexible connection with the upper connection copper busbar and the coupling hole of the flexible connection with the processed lower connection copper busbar.

[0022] In the above-mentioned method for on-site installation of flexible connection of a million-kilowatt steam turbine generator set, a 10 mm wide groove is provided on the sleeve joint assembly support block in S4, and a rope is used to tighten the inner circumference of the groove.

[0023] In the above-mentioned method for on-site installation of a flexible connection of a million-kilowatt steam turbine generator set, the qualified standard for checking the gap between the arc-shaped top pieces of the flexible connection with a feeler gauge in S14 is to maintain a gap of about 0.1 mm between the pieces.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention discloses a method for on-site installation of a flexible connection of a million-kilowatt steam turbine generator set, which utilizes a flexible connection template and an outlet joint template to replace the flexible connection, the sleeve joint assembly, and the actual matching of the connection copper bar. The problem of large installation hidden dangers, low installation efficiency, and difficult deformation control of the flexible connection parts is solved. The main technical solution of the present invention is to realize the installation hidden dangers such as stress-free deformation of the flexible connection parts by gradually pushing back the actual matching from one side of the outlet terminal. The installation quality is significantly improved by setting a reasonable installation sequence, installation process parameters, and other measures. The installation hidden dangers caused by the inability to align the various parts of the flexible connection can be effectively controlled, and the installation is beautiful, practical, and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation of the flexible connection sample;

[0027] Figure 2 It is a schematic diagram of the assembly and installation of the casing joint;

[0028] Figure 3 This is the installation diagram of the lower connecting copper bar;

[0029] Figure 4 This is a schematic diagram of the outlet connector sample;

[0030] Figure 5 This is a schematic diagram of the flexible connection structure after installation.

[0031] Marking instructions in the figure: 1-flexible connection template, 2-flexible connection template gasket, 3-gasket A, 4-sleeve joint assembly support block, 5-sleeve joint assembly, 6-rope, 7-lower connection copper busbar, 8-outlet sleeve, 9-wooden square, 10-gasket B, 11-two vertical edges, 12-outlet joint template, 13-processed lower connection copper busbar, 14-flexible connection. DETAILED DESCRIPTION

[0032] The present application is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present application.

[0033] This embodiment provides a method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection, which is implemented by the following steps:

[0034] S1. Preparation: Clean the inside of the terminal box, the silver-plated surface of the stator and serial leads, the silver-plated surface of the outlet bushing 8, the upper connecting copper bar, and the outer surface of the lower connecting copper bar 7, and remove the debris and oil stains on the silver-plated surface of the stator and serial leads, the silver-plated surface of the outlet bushing 8, the upper connecting copper bar, and the lower connecting copper bar 7 to avoid safety hazards after the flexible connection is installed.

[0035] S2. Install the upper connecting copper bar: according to the torque requirements in the drawing, use bolts to fix the upper connecting copper bar to the stator and connect the lead wires on the silver-plated surface.

[0036] S3. Install flexible connection sample 1: Figure 1 As shown, the upper part of the flexible connection template 1 and the upper part of the flexible connection template gasket 2 are installed on the upper connection copper busbar. First, use the positioning pins A and B for positioning, and then fix the tool screws A and tool nuts A between the upper connection copper busbar, the upper part of the flexible connection template 1, and the upper part of the flexible connection template gasket 2. The combined torque of the tool screws A and tool nuts A for fixing the upper connection copper busbar, the upper part of the flexible connection template 1, and the upper part of the flexible connection template gasket 2 is the same as the installation torque of the product screws and product nuts for fixing the flexible connection 14. Using tool screws and tool nuts instead of product screws and product nuts and using the same assembly torque can ensure the product appearance and installation quality.

[0037] S4. Loosen the bolts of the casing joint assembly 5: Figure 2 As shown, the sleeve joint assembly support block 4 is installed: the sleeve joint assembly support block 4 is arranged on the outer circle of the outlet sleeve 8, and is adjusted through the gasket A3 so that the height of the four sides of the sleeve joint assembly support block 4 is H, and the closing bolts of the sleeve joint assembly 5 are loosened so that the sleeve joint assembly support block 4 supports the sleeve joint assembly 5 to ensure that the sleeve joint assembly 5 is in a correct posture.

[0038] S5. Install the lower connecting copper bar 7: Figure 3 As shown, use wooden square 9 and gasket B10 to support and adjust the position of the lower connecting copper bus 7, install the lower connecting copper bus 7 on the lower part of the flexible connection template gasket 2 and the lower part of the flexible connection template 1, and fix the tool screw B and tool nut B between the flexible connection template 1, the lower connecting copper bus 7, and the flexible connection template gasket 2; first use the positioning pin C and the positioning pin D for positioning, and then fix the tool screw B and tool nut B between the lower part of the flexible connection template gasket 2 and the lower part of the flexible connection template 1. The wooden square 9 and gasket B10 can be used to support the lower connecting copper bus 7, which is convenient for the installation of the lower connecting copper bus 7.

[0039] S6. Adjust the position of the sleeve joint assembly 5 and the lower connecting copper bar 7: Use a jack to adjust the angle of the sleeve joint assembly 5 in the circumferential direction so that the sleeve joint assembly 5 and the lower connecting copper bar 7 can achieve good contact. The contact area must reach more than 95% to ensure the repair quality of the lower connecting copper bar 7.

[0040] S7. Preparation work before marking the lower connecting copper busbar 7: Assemble the engaging bolts of the sleeve joint assembly 5 according to the torque in the drawing, remove the sleeve joint assembly support block 4 and the gasket A3, so as to facilitate the subsequent marking on the lower connecting copper busbar 7.

[0041] S8, marking of the lower connecting copper bar 7: the material of the outlet connector sample 12 is Q235, and the position of the handle hole of the outlet connector sample 12 is the same as the position of the handle hole of the casing connector assembly 5, such as Figure 4 As shown, two vertical edges 11 of the sleeve joint assembly 5 are drawn on the lower connecting copper bar 7, and the two vertical edges 11 on the lower connecting copper bar 7 are the reference for subsequent operations.

[0042] S9. Remove the lower connecting copper busbar 7, wooden square 9, gasket B10 and jack to facilitate the subsequent installation of the lower connecting copper busbar 7.

[0043] S10. Fitting and processing the lower connecting copper busbar 7: align the right-angled side of the outlet connector template 12 with the two vertical sides 11 on the lower connecting copper busbar 7, process the mating holes of the lower connecting copper busbar 7 and the sleeve connector assembly 5, and obtain the processed lower connecting copper busbar 13. Fitting and processing the lower connecting copper busbar 7 through the outlet connector template 12 is convenient, fast and accurate.

[0044] S11. Preparation work before the formal installation of the processed lower connecting copper busbar 13: Use wooden squares 9 and gaskets B10 to support and adjust the position of the processed lower connecting copper busbar 13. On the non-outlet bushing 8 side of the processed lower connecting copper busbar 13, first use positioning pins C and positioning pins D to position the processed lower connecting copper busbar 13, the lower part of the flexible connection template 1, and the lower part of the flexible connection template gasket 2. Then, fix the flexible connection template 1, the processed lower connecting copper busbar 13, and the flexible connection template gasket 2 with tool screws B and tool nuts B, so that the processed lower connecting copper busbar 13 is fixed to the flexible connection template 1, which is convenient for the subsequent installation of the processed lower connecting copper busbar 13.

[0045] S12. Installation of the processed lower connecting copper busbar 13 on the outlet bushing 8 side: Assemble the processed lower connecting copper busbar 13 with the bushing joint assembly 5; remove the flexible connection template 1, flexible connection template gasket 2, positioning pin A, positioning pin B, tool screw A, tool nut A, positioning pin C, positioning pin D, tool screw B and tool nut B, and install the processed lower connecting copper busbar 13 on the outlet bushing 8 side. At this time, the lower connecting copper busbar 13 has been correctly installed, and remove the flexible connection template 1, flexible connection template gasket 2, positioning pin A, positioning pin B, tool screw A, tool nut A, positioning pin C, positioning pin D, tool screw B and tool nut B to facilitate the installation of the flexible connection 14.

[0046] S13, formal installation of flexible connection 14: The flexible connection 14 is installed from top to bottom, and the flexible connection 14 and the upper connection copper bar are fixed with product screws and product nuts, and the flexible connection 14, the clamping plate and the processed lower connection copper bar 13 are fixed with product screws and product nuts. After fixing, remove the jack, wooden square 9, and gasket B10 supported under the fixed flexible connection sample 1. At this time, the flexible connection 14 has been correctly installed.

[0047] S14. Inspection and finishing of the status of flexible connection 14: Use a feeler gauge to check the arc-shaped top of the flexible connection 14. If it meets the requirements, tighten the product nut according to the torque required by the drawing, and clean the inside of the outlet box to ensure the installation quality of the flexible connection 14.

[0048] Furthermore, the engaging hole between the lower connecting copper bar 7 and the flexible connection 14 in S1 is a pre-processed waist-shaped hole. The waist-shaped hole on the connecting copper bar 7 is used to reduce the repair amount of the lower connecting copper bar 7 and improve the installation efficiency.

[0049] Because the lower connecting copper bar 7 is processed into a waist-shaped hole, the time for actually matching the lower connecting copper bar 7 with the hole during assembly and for taking out, transporting and putting back the lower connecting copper bar 7 from the outlet box for matching the hole is reduced, thereby improving the installation efficiency.

[0050] Furthermore, after the upper copper bar in S2 is fixed to the stator and the silver-plated surface of the lead wire is connected, a feeler gauge is used to measure the gap between the two mating surfaces. The gap value is less than 0.02mm, so as to avoid affecting the subsequent repair quality due to excessive gap between the two mating surfaces.

[0051] If the upper connecting copper bar is fixed to the stator and the silver-plated surface of the lead wire is connected, use a feeler gauge to measure the gap between the two surfaces. If the gap value is greater than 0.02mm, it means that the contact area between the two is small, which may easily cause quality accidents when the unit is running. It is necessary to loosen the copper bar, adjust the state and re-close it.

[0052] Furthermore, in the S3, positioning pins A and B are diagonally installed on the upper connecting copper bar, the upper part of the flexible connection template 1 and the upper part of the flexible connection template gasket 2. This facilitates operation and improves assembly efficiency.

[0053] Positioning pins A and B are installed diagonally on the upper connecting copper bar, the upper part of the flexible connecting sample 1 and the upper part of the flexible connecting sample gasket 2. The method of diagonally installing pins and fixing parts is highly efficient.

[0054] Furthermore, the material of the flexible connection template 1 in S3 is Q235B, and the coupling hole of the flexible connection template 1 is divided into upper and lower parts, which respectively correspond to the coupling hole between the flexible connection 14 and the upper connecting copper busbar and the coupling hole between the flexible connection 14 and the processed lower connecting copper busbar 13.

[0055] The handle hole of the flexible connection template 1 is divided into two parts, upper and lower, corresponding to the handle hole of the flexible connection 14 and the upper connection copper bar and the handle hole of the flexible connection 14 and the processed lower connection copper bar 13, respectively, with a simple structure. The material of the flexible connection template 1 is Q235, which has sufficient strength, is not easy to deform, and is light in weight, and is easy to move.

[0056] Furthermore, in the S4, a groove with a width of 10 mm is provided on the sleeve joint assembly support block 4, and a rope 6 is used to tighten the inner circumference of the groove. The sleeve joint assembly support block 4 is tied by the rope 6 to prevent the sleeve joint assembly support block 4 from becoming loose, thereby affecting the repair quality of the upper connecting copper busbar.

[0057] There is a 10mm wide groove on the sleeve joint assembly bracket 4, and a rope 6 is used to tighten the inner circumference of the groove, so that the sleeve joint assembly bracket 4 is tightly fixed in the circumferential direction, and the position of the upper connecting copper busbar will not change due to the looseness of the sleeve joint assembly bracket 4, thereby reducing the repair quality of the upper connecting copper busbar.

[0058] Furthermore, the qualified standard of the gap between the arc-shaped top pieces of the flexible connection 14 checked by the feeler gauge in S14 is that the gap between the pieces is about 0.1mm. By setting the installation process parameters reasonably, the quality of the installation of the flexible connection 14 is ensured. Finally, the effect of the installation is as follows: Figure 5 shown.

[0059] The gap between the arc-shaped top pieces of the flexible connection 14 is set to a gap value of about 0.1 mm. By reasonably setting the "gap zone", on the one hand, repeated adjustments during the installation process are avoided, which wastes time and costs. On the other hand, the installation quality of the flexible connection 14 is guaranteed, and abnormal force is avoided, which may cause quality risks.

[0060] The present invention is only an exemplary description of the present invention and does not limit its protection scope. Those skilled in the art may also make partial changes thereto, which are within the protection scope of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection, characterized in that: The method is implemented by the following steps: S1. Preparation: clean the inside of the outlet box, the silver-plated surface of the stator and the lead, the silver-plated surface of the outlet bushing (8), the upper connecting copper bar, and the outer surface of the lower connecting copper bar (7), and remove the surface debris and oil stains of the silver-plated surface of the stator and the lead, the silver-plated surface of the outlet bushing (8), the upper connecting copper bar, and the lower connecting copper bar (7); S2. Install the upper copper bar: according to the torque requirements in the drawing, use bolts to fix the upper copper bar to the stator and connect the lead wires on the silver-plated surface; S3. Install the flexible connection sample (1): install the upper part of the flexible connection sample (1) and the upper part of the flexible connection sample gasket (2) on the upper connection copper bar, first use the positioning pins A and positioning pins B for positioning, and then tighten the tool screws A and tool nuts A between the upper connection copper bar, the upper part of the flexible connection sample (1) and the upper part of the flexible connection sample gasket (2). The combined torque of tightening the tool screws A and tool nuts A between the upper connection copper bar, the upper part of the flexible connection sample (1) and the upper part of the flexible connection sample gasket (2) is the same as the installation torque of the product screws and product nuts for tightening the flexible connection (14); S4, loosen the locking bolts of the casing joint assembly (5); install the casing joint assembly support block (4): arrange the casing joint assembly support block (4) on the outer circle of the outlet casing (8), and adjust it through the gasket A (3) so that the height of the four sides of the casing joint assembly support block (4) is H, loosen the locking bolts of the casing joint assembly (5), so that the casing joint assembly support block (4) supports the casing joint assembly (5); S5. Install the lower copper busbar (7): Use the wooden block (9) and the gasket B (10) to hold and adjust the position of the lower copper busbar (7), install the lower copper busbar (7) on the lower part of the flexible connection template gasket (2) and the lower part of the flexible connection template (1), and tighten the tool screw B and tool nut B between the flexible connection template (1), the lower copper busbar (7), and the gasket (2) of the flexible connection template; first use the positioning pin C and the positioning pin D to position, and then tighten the tool screw B and tool nut B between the lower copper busbar (7), the lower part of the flexible connection template gasket (2), and the lower part of the flexible connection template (1); S6. Adjust the position of the sleeve joint assembly (5) and the lower connecting copper bar (7): Use a jack to adjust the angle of the sleeve joint assembly (5) in the circumferential direction so that the sleeve joint assembly (5) contacts the lower connecting copper bar (7), and the contact area must reach more than 95%; S7. Preparation work before marking the lower connecting copper bar (7): assemble the sleeve joint assembly (5) with the bolts according to the torque in the drawing, and remove the sleeve joint assembly support block (4) and gasket A (3); S8. Marking the lower copper bar (7): The material of the outlet connector template (12) is Q235. The position of the engagement hole of the outlet connector template (12) is the same as the position of the engagement hole of the sleeve connector assembly (5). Draw two vertical edges (11) of the sleeve connector assembly (5) on the lower copper bar (7); S9, disassemble the lower connecting copper bar (7), wooden block (9), gasket B (10) and jack; S10, processing the lower connecting copper bar (7): aligning the right-angled side of the outlet connector template (12) with the two vertical sides (11) on the lower connecting copper bar (7), processing the engaging hole of the lower connecting copper bar (7) and the sleeve connector (5), and obtaining the processed lower connecting copper bar (13); S11. Preparation work before formal installation of the processed lower connecting copper bar (13): Use wooden squares (9) and gaskets B (10) to support and adjust the position of the processed lower connecting copper bar (13). On the non-outlet bushing (8) side of the processed lower connecting copper bar (13), first use positioning pins C and positioning pins D to position the processed lower connecting copper bar (13), the lower part of the flexible connecting template (1), and the lower part of the flexible connecting template gasket (2). Then, close and fix the tool screws B and tool nuts B between the flexible connecting template (1), the processed lower connecting copper bar (13), and the flexible connecting template gasket (2); S12, installation of the outlet bushing (8) side of the processed lower connecting copper bar (13): assemble the processed lower connecting copper bar (13) with the bushing joint assembly (5); remove the flexible connecting template (1), the flexible connecting template gasket (2), the positioning pin A, the positioning pin B, the tool screw A, the tool nut A, the positioning pin C, the positioning pin D, the tool screw B and the tool nut B; S13, formal installation of the flexible connection (14): the flexible connection (14) is installed from top to bottom, and the flexible connection (14) and the upper connection copper bar are fixed with product screws and product nuts, and the flexible connection (14), the clamping plate and the processed lower connection copper bar (13) are fixed with product screws and product nuts. After fixing, the jack, wooden square (9) and gasket B (10) supported under the fixed flexible connection template (1) are removed; S14. Check and finish the status of the flexible connection (14): Use a feeler gauge to check the arc top of the flexible connection (14). If it meets the requirements, tighten the product nut according to the torque required by the drawing and clean the inside of the outlet box.

2. A method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection according to claim 1, characterized in that: In the above S1, the engaging hole between the lower connecting copper bar (7) and the flexible connection (14) is a pre-processed waist-shaped hole.

3. The method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection according to claim 1, characterized in that: In S2, after the upper connecting copper bar is fixed to the stator and the silver-plated surface of the lead wire is connected, the gap between the two mating surfaces is measured with a feeler gauge, and the gap value is less than 0.02mm.

4. The method for on-site installation of a million-kilowatt steam turbine generator set flexible connection according to claim 1, characterized in that: In S3, positioning pins A and B are installed diagonally on the upper connecting copper bar, the upper part of the flexible connecting template (1) and the upper part of the flexible connecting template gasket (2).

5. The method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection according to claim 1, characterized in that: In S3, the material of the flexible connection template (1) is Q235B, and the coupling hole of the flexible connection template (1) is divided into upper and lower parts, which respectively correspond to the coupling hole between the flexible connection (14) and the upper connecting copper busbar and the coupling hole between the flexible connection (14) and the processed lower connecting copper busbar (13).

6. The method for on-site installation of a million-kilowatt steam turbine generator set with flexible connection according to claim 1, characterized in that: In the above-mentioned S4, a groove with a width of 10 mm is provided on the sleeve joint assembly support block (4), and a rope (6) is used to tighten the inner circumference of the groove.

7. The method for on-site installation of a million-kilowatt steam turbine generator set flexible connection according to claim 1, characterized in that: In the above S14, the gap between the arc-shaped top pieces of the flexible connection (14) is checked by a feeler gauge, and the qualified standard is that the gap between the pieces is about 0.1 mm.

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