Water turbine generator set runner room concrete dismantling annular lifting mechanism and using method

Abstract

The application discloses a hoisting mechanism for removing concrete in a runner chamber of a hydroelectric generator unit and a use method thereof. The hoisting mechanism comprises an upper annular track, a lower annular track, a lifting tower and a lifting module. The lifting tower is provided with a lower driving module and an upper driving module at two ends respectively. The lower driving module is in sliding transmission connection with the lower annular track, and the upper driving module is in sliding transmission connection with the upper annular track. The lifting module is slidingly installed on the lifting tower. A plurality of upper supporting mechanisms are installed on the outer periphery of the upper annular track, and a plurality of lower supporting mechanisms are installed on the outer periphery of the lower annular track. The lifting module is used for installing a high-pressure water jet breaking robot, so that the concrete in the runner chamber of the large-diameter hydroelectric generator unit can be stably, accurately and automatically removed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of large-scale water turbine generator unit reconstruction construction high-end equipment, mainly relates to a water turbine generator unit runner chamber concrete removal annular lifting mechanism and a use method thereof, and is suitable for the removal construction of a water turbine generator unit runner chamber concrete. BACKGROUND

[0002] During the reconstruction of a 170MW unit of a certain large-scale hydropower station, the original runner chamber second-stage concrete needs to be removed, the minimum size of the inner diameter of the runner chamber shell is 11.00 meters, the maximum outer diameter to be reached during the removal is 13.5 meters, and the maximum diameter of the top individual position reaches 14.6 meters. The removal area has a height range of 6.16 meters, and the bottom elevation is 32.8 meters. At present, the removal construction methods commonly used in the industry mainly include manual mechanical methods, such as the use of mechanical equipment such as a pneumatic pick, a rock drill, and a hydraulic splitting machine. However, this method has low efficiency, high risk of open-air operation, and high dust and noise, which poses a risk to occupational health. In the face of large-size runner chamber concrete removal, this method requires a large amount of manpower and a long construction period, and it is difficult to meet the on-site construction needs of large-scale water turbine generator unit reconstruction.

[0003] In view of the problems of manual removal operation, in April 2021, the China Railway Engineering Equipment Co., Ltd. published a paper entitled “Design and Construction Technology Research of High-Pressure Water Jet Breaking and Removing Runner Chamber Special Machinery” in the “Construction Technology”. The paper proposes to use high-pressure water jet to break and remove the concrete of the runner chamber according to the structure of the runner chamber, and designs a high-pressure water jet breaking and removing robot to perform the breaking and removing operation of the runner chamber concrete. The high-pressure water jet breaking and removing robot includes a bearing platform, a breaking and removing robot, a lifting and hoisting device, and auxiliary equipment. The bearing platform is connected to the top cover flange surface above the fixed guide vane, and the bearing device has a whole weight. The middle support connecting column of the bearing platform is connected to the lifting platform below, and the high-pressure water jet breaking and removing robot works on the lifting platform. The lifting and hoisting device is placed on the bearing platform to lift the lifting platform and hoist the soil. Other auxiliary equipment includes a high-pressure water jet generating device and a ventilation device, which are also placed on the bearing platform. However, the special machinery has the following problems in the specific use process: first, since the large-scale runner chamber needs to be removed at a high height and has a large diameter, the connecting column is directly arranged at the center of the runner chamber, and the bottom is a cantilever structure, which may sway and cannot guarantee the stability during the operation; second, the high-pressure water jet breaking and removing robot is a relatively independent structure and is supported on the lifting platform, and the position of the robot breaking and removing cannot be accurately controlled during the specific operation. SUMMARY

[0004] The technical problem to be solved by the present invention is to address the problems existing in the background art and provide a circumferential lifting mechanism for demolishing concrete in the runner chamber of a hydro-generator unit. This equipment is based on the structural characteristics of the runner chamber of a large hydro-generator unit. It achieves full coverage of the demolition range of the runner chamber of a large hydro-generator unit through a circumferential lifting mechanism composed of an upper ring track, a lower ring track, a lifting tower, and a lifting module. The lifting module is equipped with an execution front end for high-pressure water jet demolition operations, thereby enabling stable, accurate, and automatic demolition of concrete in the runner chamber of a large-diameter hydro-generator unit.

[0005] Another technical problem to be solved by the present invention is to provide a method for using the circumferential lifting mechanism for demolishing the concrete of the turbine generator set runner chamber.

[0006] To achieve the aforementioned technical features, the present invention aims to provide a circumferential lifting mechanism for the concrete removal of the turbine generator runner chamber. This mechanism includes an upper annular track, a lower annular track, a lifting tower, a lower drive module, an upper drive module, and a lifting module. The upper annular track is located above the lower annular track. The lower drive module and the upper drive module are respectively installed at both ends of the lifting tower. The lower drive module is slidably connected to the lower annular track, and the upper drive module is also slidably connected to the upper annular track. The lifting tower can move in a circle along the upper and lower annular tracks via the lower and upper drive modules. The lifting module is slidably mounted on the lifting tower. Several upper support mechanisms are installed on the outer circumference of the upper annular track, and several lower support mechanisms are installed on the outer circumference of the lower annular track. The upper annular track, the lower annular track, and the lifting tower are all composed of multiple segments spliced ​​together.

[0007] The upper and lower annular tracks are each composed of multiple arc segments. Each arc segment includes two arc tracks arranged vertically. One end of each arc track has an inner interface, and the other end has an outer plug. The inner interface and the outer plug are compatible. An arc-shaped inner rack is arranged horizontally between the two arc tracks. Several support members are fixed to the upper and lower sides of the arc-shaped inner rack and connected to the two arc tracks.

[0008] The upper support mechanism includes an upper support fixing plate. The lower end of the upper support fixing plate is hinged to a first horizontal connecting rod and a second obliquely upward connecting rod. The ends of the first and second connecting rods away from the upper support fixing plate are respectively hinged to the upper support column. The upper end of the upper support fixing plate is hinged to one end of the upper support short rod, and the other end of the upper support short rod is hinged to the second connecting rod. The lengths of the first connecting rod, the second connecting rod, and the upper support short rod are adjustable. The upper support mechanism is connected and fixed to the upper annular track through the upper support fixing plate.

[0009] The lower support mechanism includes a lower support fixing plate. The upper end of the lower support fixing plate is hinged to a horizontal third link and a downward-sloping fourth link. The ends of the third link and the fourth link away from the lower support fixing plate are respectively hinged to support seats. The lower end of the lower support fixing plate is hinged to one end of the lower support short rod, and the other end of the lower support short rod is hinged to the fourth link. The lengths of the third link, the fourth link, and the lower support short rod are adjustable. The lower support mechanism is connected and fixed to the lower annular track through the lower support fixing plate.

[0010] The lower drive module includes a lower drive seat, which is fixedly installed on one side of the bottom of the lifting tower. A lower drive box is installed on the side of the lower drive seat closest to the lifting tower, and a lower track pulley assembly is installed on the side of the lower drive seat away from the lifting tower. A lower transmission gear in the lower drive box extends into the side of the lower drive seat away from the lifting tower. The lower track pulley assembly clamps the lower annular track from both the upper and lower sides, and the lower transmission gear meshes with the arc-shaped internal rack of the lower annular track. The upper drive module includes an upper drive seat, which is fixedly installed on one side of the top of the lifting tower. An upper drive box is installed on the side of the upper drive seat closest to the lifting tower, and an upper track pulley assembly is installed on the side of the upper drive seat away from the lifting tower. An upper transmission gear in the upper drive box extends into the side of the upper drive seat away from the lifting tower, and the upper track pulley assembly clamps the upper annular track from both the upper and lower sides. The upper transmission gear meshes with the arc-shaped internal rack of the upper annular track.

[0011] A hydraulic motor is installed on the upper side of the upper drive box, and a drive shaft is rotatably installed inside the lifting tower. The lower end of the drive shaft is connected to the lower drive box, and the upper end is connected to the upper drive box through a spline joint. The hydraulic motor is connected to the upper drive box. An encoder is installed at the end of the central shaft of the upper drive gear.

[0012] The lifting tower is assembled from multiple lifting component frames. One end of each lifting component frame has a protrusion and the other end has a concave part, which are adapted to each other. The lifting tower has a limiting hole at one end of the protrusion and a limiting component installed at one end of the concave part. A support frame is provided inside the lifting component frame, and a rotating shaft is rotatably installed on the support frame. When assembling the lifting component frames, the limiting component is inserted into the limiting hole to connect and fix adjacent lifting component frames. The rotating shafts are connected by a spline joint to form a drive shaft.

[0013] A floating assembly is installed on the top of the lifting tower. The floating assembly includes a guide assembly, an elastic assembly, and a support plate. The guide assembly includes multiple guide rods and guide sleeves. The lower ends of the guide rods are fixedly installed on the top of the lifting tower, and the guide sleeves are installed on the support plate. The upper ends of the guide rods slide upward through the support plate and are slidably connected to the guide sleeves. The elastic assembly includes a connecting rod, a spring, and a nut. The lower end of the connecting rod is fixedly installed on the top of the lifting tower, and the upper end slides upward through the support plate. The spring is fitted onto the upper side of the connecting rod on the support plate, and a nut is screwed onto the top of the connecting rod, with the nut abutting against the spring. The floating assembly is connected and fixed to the upper drive module through the support plate.

[0014] The lifting module includes a lifting box, inside which limit guide wheel sets are respectively provided at the four corners of the lifting tower. A reducer is installed on one side of the outside of the lifting box. The input shaft of the reducer is connected to the output shaft of the lifting hydraulic motor. A lifting gear is installed on the output shaft of the reducer. A rack is installed longitudinally on the outside of the lifting tower. The lifting gear meshes with the rack for transmission.

[0015] The method for using the circumferential lifting mechanism for demolishing the concrete runner chamber of a hydroelectric generator set includes the following steps:

[0016] Step 1: Install the lower ring track; using the flange face on the foundation ring as a reference, mark the installation position of the support seat of the lower support mechanism downward according to the concrete removal range of the impeller chamber. Weld several support seats in a ring on the inner wall of the tailwater pipe on the lower side of the impeller chamber. Assemble the lower support mechanism on the support seats. Then assemble the arc segments into the lower ring track one by one through the lower support mechanism. The outer plug of the arc segment is inserted into the inner interface of the adjacent arc segment. The two adjacent segments are locked by the support screws. The outer circumference of the lower ring track is installed and connected to the lower support fixing plate of the lower support mechanism.

[0017] Step 2: Install the upper ring track; the number of upper support mechanisms is the same as the number of fixed guide vanes of the unit, the upper support column backs against the fixed guide vanes and is welded to the fixed guide vanes, the lower end of the upper support column is welded to the metal surface of the lower liner of the seat ring, the first connecting rod points to the center of the wheel chamber, the arc section of the upper ring track is connected end to end, adjacent sections are locked with support screws, and the arc sections are assembled into the upper ring track one by one by the upper support mechanism;

[0018] Step 3: Install the lower drive module; ensure that the lower track pulley group is in close contact with the two arc-shaped tracks of the lower ring track from both the top and bottom sides, and that the lower transmission gear meshes with the arc-shaped inner rack of the lower ring track;

[0019] Step 4: Install the lifting tower; install the lifting component frames one by one on the basis of the lower drive module, and use limit pieces to lock the connection between adjacent frames to ensure that the lifting component frames fit tightly and have no lateral displacement, and to ensure smooth connection of the rack and pinion; while installing the lifting tower, connect the rotating shafts to form a drive shaft through spline joints.

[0020] Step 5: Install the lifting module; Before the lifting tower and the upper drive module are closed, install the lifting module, hoist the lifting module and insert it into the lifting tower, adjust the limit piece on one side of the reducer, and push the reducer through the limit piece so that the lifting gear on the output shaft of the reducer meshes with the rack;

[0021] Step 6: Install the upper drive module; ensure that the upper track pulley block is in close contact with the two arc-shaped tracks of the upper ring track from both the top and bottom, and that the upper transmission gear meshes with the arc-shaped inner rack of the upper ring track;

[0022] Step 7: Install the floating assembly; connect the support plate of the floating assembly to the upper drive module, and continue to install the lifting tower. The guide rod and connecting rod at the top of the lifting tower are inserted into the support plate respectively. Then, install springs and nuts on the connecting rods to make the lifting tower and the upper drive module elastically guided and connected.

[0023] Step 8: Hoist the mobile hydraulic station to the designated location and restrict its movement, then connect the hydraulic oil pipes to each hydraulic actuator. The lifting tower rotates in a circle along the circular track, and the lifting module moves up and down along the lifting tower. The mobile hydraulic station is an integrated structure of the hydraulic station and control system.

[0024] Step 9: After the project is completed, before dismantling the equipment, move the lifting module to the middle position of the lifting tower and place it in the middle of the single-section lifting component frame. Then, in sequence, remove the mobile hydraulic station, the upper drive module, and dismantle the lifting tower, lifting module, lower drive module, upper and lower circular tracks and their support components from top to bottom.

[0025] The present invention has the following beneficial effects:

[0026] 1) The upper and lower circular tracks, as well as the lifting tower, are all assembled from multiple sections for easy installation. The design of the upper and lower circular tracks and the lifting tower fully accommodates the vertical cylindrical structure of the turbine generator runner, greatly satisfying the requirements for concrete removal. This allows the high-pressure water jet and high-pressure spray gun to reach all 360° removal surfaces of the runner, significantly improving concrete removal efficiency. Based on the structural characteristics of large-diameter turbine generator runners, this equipment, through the high-pressure water jet actuator and high-pressure spray gun installed on the lifting module, enables stable, precise, automatic, and remote removal of concrete from large-diameter turbine generator runners.

[0027] 2) A single hydraulic motor is used to drive both the lower and upper drive boxes simultaneously, making the transmission of the lower and upper drive boxes more synchronized.

[0028] 3) By setting up floating components, the lifting tower can adapt to the height error caused by the inability of the upper and lower circular tracks to be completely parallel, thus improving the compatibility of the entire mechanism. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a schematic diagram of the overall structure of the mechanism of the present invention;

[0031] Figure 2 This is a three-dimensional structural diagram of the arc-shaped segments of the upper and lower circular tracks of the present invention;

[0032] Figure 3 This is a schematic diagram of the support mechanism structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the support mechanism structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the connection between the lifting tower and the lower drive module and the upper drive module of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the drive module with the hydraulic motor installed in this invention;

[0036] Figure 7 This is a schematic diagram of the structure of the lifting component frame of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the floating component of the present invention;

[0038] Figure 9 This is a schematic diagram of the transmission structure of the lifting module of the present invention;

[0039] Figure 10 This is a schematic diagram of the lifting box structure of the lifting module of the present invention;

[0040] In the figure: upper ring track 10, upper support mechanism 20, upper support fixing plate 21, first connecting rod 22, second connecting rod 23, upper support column 24, upper support short rod 26;

[0041] Lower annular track 30, arc track 31, support 32, arc inner rack 33, inner interface 34, outer plug 35;

[0042] Lower support mechanism 40, lower support fixing plate 41, third link 42, support seat 43, fourth link 44, lower support short rod 45;

[0043] Lifting tower 50, lifting component frame 51, protrusion 52, limiting hole 53, recess 54, limiting component 55, support frame 56, rotating shaft 57, rack 58;

[0044] Lower drive module 60, lower drive base 61, lower drive box 62, lower track pulley block 63, lower transmission gear 64;

[0045] Upper drive module 70, upper drive base 71, upper drive box 72, upper track pulley block 73, upper transmission gear 74, hydraulic motor 75, spline pair 76, encoder 77, drive shaft 78;

[0046] Lifting module 80, lifting box 81, reducer 82, lifting hydraulic motor 83, synchronous gear 84, lifting gear 85, limit guide wheel group 86;

[0047] Floating component 90, guide rod 91, guide sleeve 92, connecting rod 93, spring 94, nut 95, support plate 96;

[0048] Mobile hydraulic station 100, hydraulic oil pipe 101. Detailed Implementation

[0049] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0050] Example 1:

[0051] See Figures 1-10The circumferential lifting mechanism for demolishing the concrete runner chamber of a hydro-generator unit includes an upper annular track 10, a lower annular track 30, a lifting tower 50, a lower drive module 60, an upper drive module 70, and a lifting module 80. The upper annular track 10 is located above the lower annular track 30. The lower drive module 60 and the upper drive module 70 are respectively installed at both ends of the lifting tower 50. The lower drive module 60 is slidably connected to the lower annular track 30, and the upper drive module 70 is slidably connected to the upper annular track 10. The lifting tower 50 can move in a circle along the upper annular track 10 and the lower annular track 30 through the lower drive module 60 and the upper drive module 70. The lifting module 80 is slidably installed on the lifting tower 50. Several upper support mechanisms 20 are installed on the outer circumference of the upper annular track 10, and several lower support mechanisms 40 are installed on the outer circumference of the lower annular track 30. The upper annular track 10, the lower annular track 30, and the lifting tower 50 are all spliced ​​from multiple sections for easy installation. The design of the upper and lower annular tracks and the lifting tower fully adapts to the vertical cylindrical structure of the turbine generator runner, greatly satisfying the requirements for demolishing the concrete in the runner. This allows the high-pressure water jet and high-pressure spray gun to reach all 360° demolition surfaces of the runner, significantly improving concrete demolition efficiency. Based on the structural characteristics of large-diameter turbine generator runners, this equipment utilizes upper and lower annular tracks, a lifting tower, and a lifting module. The lifting module is equipped with a water jet demolition robot, enabling stable, precise, and automatic demolition of the concrete in large-diameter turbine generator runners.

[0052] See Figure 2 The upper annular track 10 and the lower annular track 30 are each composed of multiple arc-shaped segments. Each arc-shaped segment includes two arc-shaped tracks 31 arranged vertically. One end of each arc-shaped track 31 has an inner interface 34, and the other end has an outer plug 35. The inner interface 34 and the outer plug 35 are compatible. An arc-shaped inner rack 33 is arranged laterally between the two arc-shaped tracks 31. Several support members 32 are fixed to the upper and lower sides of the arc-shaped inner rack 33 and connected to the two arc-shaped tracks 31. The structure is simple and easy to install. Preferably, the arc-shaped track 31 is formed by bending a square tube, but a round tube can also be used.

[0053] See Figure 3The upper support mechanism 20 includes an upper support fixing plate 21. A first horizontal connecting rod 22 and a second obliquely upward connecting rod 23 are hinged to the lower end of the upper support fixing plate 21. The ends of the first connecting rod 22 and the second connecting rod 23 away from the upper support fixing plate 21 are respectively hinged to the upper support column 24. The upper end of the upper support fixing plate 21 is hinged to one end of an upper support short rod 26, and the other end of the upper support short rod 26 is hinged to the second connecting rod 23. The lengths of the first connecting rod 22, the second connecting rod 23, and the upper support short rod 26 are adjustable. The upper support mechanism 20 is connected and fixed to the upper annular track 10 through the upper support fixing plate 21. A stable support is formed through the double-link structure. The adjustable lengths of the first connecting rod 22, the second connecting rod 23, and the upper support short rod 26 facilitate adjustment of the center position and level of the upper annular track 10. Preferably, the first connecting rod 22, the second connecting rod 23, and the upper support short rod 26 are respectively provided with positive and negative thread structures, allowing for length adjustment.

[0054] See Figure 4 The lower support mechanism 40 includes a lower support fixing plate 41. A horizontal third connecting rod 42 and a downwardly angled fourth connecting rod 44 are hinged to the upper end of the lower support fixing plate 41. Support seats 43 are respectively hinged to the ends of the third connecting rod 42 and the fourth connecting rod 44 away from the lower support fixing plate 41. The lower end of the lower support fixing plate 41 is hinged to one end of a lower support short rod 45, and the other end of the lower support short rod 45 is hinged to the fourth connecting rod 44. The lengths of the third connecting rod 42, the fourth connecting rod 44, and the lower support short rod 45 are adjustable. The lower support mechanism 40 is connected and fixed to the lower annular track 30 through the lower support fixing plate 41. The third connecting rod 42 and the fourth connecting rod 44 form a stable support. The adjustable lengths of the third connecting rod 42, the fourth connecting rod 44, and the lower support short rod 45 facilitate adjustment of the center position and horizontality of the lower annular track 30, ensuring that the upper annular track 10 and the lower annular track 30 are parallel and concentric.

[0055] See Figure 5The lower drive module 60 includes a lower drive seat 61, which is fixedly installed on one side of the bottom of the lifting tower 50. A lower drive box 62 is installed on the side of the lower drive seat 61 near the lifting tower 50. A lower track pulley assembly 63 is installed on the side of the lower drive seat 61 away from the lifting tower 50. A lower transmission gear 64 in the lower drive box 62 extends into the side of the lower drive seat 61 away from the lifting tower 50. The lower track pulley assembly 63 clamps the lower annular track 30 from the upper and lower sides. The lower transmission gear 64 meshes with the arc-shaped inner rack 33 of the lower annular track 30. The upper drive module 70 includes an upper drive base 71, which is fixedly installed on one side of the top of the lifting tower 50. An upper drive box 72 is installed on the side of the upper drive base 71 closest to the lifting tower 50, and an upper track pulley assembly 73 is installed on the side of the upper drive base 71 furthest from the lifting tower 50. An upper transmission gear 74 inside the upper drive box 72 extends into the side of the upper drive base 71 furthest from the lifting tower 50. The upper track pulley assembly 73 clamps the upper annular track 10 from both the upper and lower sides. The upper transmission gear 74 meshes with the arc-shaped inner rack 33 of the upper annular track 10. The lower transmission gear 64 is driven to rotate by the lower drive box 62, and the upper transmission gear 74 is driven to rotate by the upper drive box 72. The lower transmission gear 64 meshes with the arc-shaped inner rack 33 of the lower annular track 30, and the upper transmission gear 74 meshes with the arc-shaped inner rack 33 of the upper annular track 10, thereby causing the lifting tower 50 to rotate in annularly along the inner circumference of the upper annular track 10 and the lower annular track 30.

[0056] The lower drive box 62 and the upper drive box 72 can be driven by independent drivers, for example, hydraulic motors can be installed on the lower drive box 62 and the upper drive box 72 respectively.

[0057] In a preferred embodiment, referring to 5 and 6, a single hydraulic motor 75 drives both the lower drive box 62 and the upper drive box 72 simultaneously, making their transmissions more synchronized. Specifically, a hydraulic motor 75 is mounted on the upper side of the upper drive box 72, and a drive shaft 78 is rotatably mounted inside the lifting tower 50. The lower end of the drive shaft 78 is connected to the lower drive box 62, and the upper end is connected to the upper drive box 72 via a spline joint 76. The hydraulic motor 75 is connected to the upper drive box 72, and an encoder 77 is mounted on the end of the central shaft of the upper transmission gear 74. The encoder 77 is used to collect the rotation data of the upper transmission gear 74, thereby calculating the travel distance.

[0058] Further, see Figure 7The lifting tower 50 is assembled from multiple lifting component frames 51. One end of each lifting component frame 51 has a protrusion 52, and the other end has a recess 54, with the protrusion 52 and the recess 54 being compatible. The lifting tower 50 has a limiting hole 53 at one end of the protrusion 52 and a limiting component 55 installed at one end of the recess 54. A support frame 56 is provided inside the lifting component frame 51, and a rotating shaft 57 is rotatably mounted on the support frame 56. When assembling the lifting component frames 51, the limiting component 55 is inserted into the limiting hole 53 to connect and fix adjacent lifting component frames 51. The rotating shafts 57 are connected by a spline joint to form a drive shaft 78. The segmented structure of the lifting component frames 51 and rotating shafts 57 facilitates installation.

[0059] See Figure 8 A floating assembly 90 is installed on the top of the lifting tower 50. The floating assembly 90 includes a guide assembly, an elastic assembly, and a support plate 96. The guide assembly includes multiple guide rods 91 and guide sleeves 92. The lower ends of the guide rods 91 are fixedly installed on the top of the lifting tower 50, and the guide sleeves 92 are installed on the support plate 96. The upper ends of the guide rods 91 slide upward through the support plate 96 and are slidably connected to the guide sleeves 92. The elastic assembly includes a connecting rod 93, a spring 94, and a nut 95. The lower end of the connecting rod 93 is fixedly installed on the top of the lifting tower 50, and the upper end slides upward through the support plate 96. The spring 94 is fitted onto the upper side of the connecting rod 93 on the support plate 96, and the nut 95 is screwed onto the top of the connecting rod 93, with the nut 95 abutting against the spring 94. The upper drive module 70 is connected and fixed to the support plate 96. By setting the floating assembly 90, the lifting tower 50 can adapt to the height error caused by the incomplete parallelism between the upper annular track 10 and the lower annular track 30, thus improving the compatibility of the entire mechanism.

[0060] See Figure 9 , 10 The lifting module 80 includes a lifting housing 81. Inside the lifting housing 81, limit guide wheel sets 86 are respectively provided at the four corners of the lifting tower 50. A reducer 82 is installed on one side of the lifting housing 81. The input shaft of the reducer 82 is connected to the output shaft of the lifting hydraulic motor 83. A lifting gear 85 is installed on the output shaft of the reducer 82. A rack 58 is longitudinally installed on the outer side of the lifting tower 50, and the lifting gear 85 meshes with the rack 58 for transmission. The structure is simple and easy to install. Furthermore, the reducer 82 is a worm gear reducer, and there are two reducers 82. The lifting hydraulic motor 83 is connected to the output shaft of one end of one reducer 82 for transmission. A synchronous gear 84 is installed on the other end of this reducer 82. A synchronous gear 84 is also installed on the input shaft of the other reducer. The two synchronous gears 84 mesh with a reversing gear, thereby synchronously driving two reducers 82 through one lifting hydraulic motor 83. This makes the lifting module 80 more stable and reliable during vertical movement.

[0061] Of course, in addition to using a gear and rack structure to slide up and down the lifting tower 50, the lifting module 80 can also use a commonly used wire drive or chain drive structure for reciprocating traction.

[0062] Example 2:

[0063] The method for using the circumferential lifting mechanism for demolishing the concrete runner chamber of a hydroelectric generator set includes the following steps:

[0064] Step 1: Install the lower annular track 30; using the flange face on the foundation ring as a reference, mark the installation position of the support seat 43 of the lower support mechanism 40 downwards according to the concrete removal range of the turbine chamber. Weld several support seats 43 in a ring on the inner wall of the tailwater pipe on the lower side of the turbine chamber. Assemble the lower support mechanism 40 on the support seats 43. Then, assemble the arc segments one by one into the lower annular track 30 through the lower support mechanism 40. The outer plug 35 of the arc segment is inserted into the inner interface 34 of the adjacent arc segment. The two adjacent segments are locked together by the screws of the support member 32. The outer circumference of the lower annular track 30 is installed and connected to the lower support fixing plate 41 of the lower support mechanism 40.

[0065] Step 2: Install the upper annular track 10; the number of upper support mechanisms 20 is the same as the number of fixed guide vanes of the unit, the upper support column 24 backs against the fixed guide vanes and is welded to the fixed guide vanes, the lower end of the upper support column 24 is welded to the metal surface of the lower liner of the seat ring, the first connecting rod 22 points to the center of the wheel chamber, and the arc-shaped segments of the upper annular track 10 are connected end to end, and adjacent segments are locked with screws by support members 32. The arc-shaped segments are assembled into the upper annular track 10 one by one by the upper support mechanism 20.

[0066] Step 3: Install the lower drive module 60; make the lower track pulley group 63 in close contact with the two arc-shaped tracks 31 of the lower annular track 30 from the upper and lower sides, and make the lower transmission gear 64 mesh with the arc-shaped inner rack 33 of the lower annular track 30.

[0067] Step 4: Install the lifting tower 50; install the lifting component frame 51 one by one on the basis of the lower drive module 60, and use the limit piece 55 to lock the connection between the upper and lower adjacent frames to ensure that the lifting component frame 51 fits tightly and has no lateral displacement, and to ensure that the rack 58 is smoothly connected; while installing the lifting tower 50, connect the rotating shafts 57 at the same time to form the drive shaft 78 through the spline pair.

[0068] Step 5: Install the lifting module 80; Before the lifting tower 50 and the upper drive module 70 are closed, install the lifting module 80, hoist the lifting module 80 and insert it into the lifting tower 80, adjust the limit piece on one side of the reducer 82, and push the reducer 82 through the limit piece so that the lifting gear 85 on the output shaft of the reducer 82 meshes with the rack 58.

[0069] Step 6: Install the upper drive module 70; make the upper track pulley group 73 in close contact with the two arc-shaped tracks 31 of the upper annular track 10 from the upper and lower sides, and make the upper transmission gear 74 mesh with the arc-shaped inner rack 33 of the upper annular track 10.

[0070] Step 7: Install the floating component 90; connect the support plate 96 of the floating component 90 to the upper drive module 70, and continue to install the lifting tower 50. The guide rod 91 and connecting rod 93 at the top of the lifting tower 50 are respectively inserted into the support plate 96. Then, install the spring 94 and nut 95 on the connecting rod 93 to make the lifting tower 50 elastically guided and connected to the upper drive module 70.

[0071] Step 8: Hoist the mobile hydraulic station 100 to the designated position and restrict its movement, and connect the hydraulic oil pipes 101 to each hydraulic actuator. The lifting tower 50 rotates in a circle along the circular track, and the lifting module 80 moves up and down along the lifting tower 50. The mobile hydraulic station 100 is an integrated structure of the hydraulic station and the control system.

[0072] Step 9: After the project is completed, before dismantling the equipment, move the lifting module 80 to the middle position of the lifting tower 50 and place it in the middle of the single-section lifting component frame 51. Then, in sequence, remove the mobile hydraulic station 100, the upper drive module 70, and dismantle the lifting tower 50, lifting module 80, lower drive module 60, upper and lower circular tracks and their support components from top to bottom.

Claims

1. A circumferential lifting mechanism for demolishing the concrete runner chamber of a hydro-generator unit, characterized in that: It includes an upper ring track (10), a lower ring track (30), a lifting tower (50), a lower drive module (60), an upper drive module (70), and a lifting module (80). The upper ring track (10) is located above the lower ring track (30). The lower drive module (60) and the upper drive module (70) are respectively installed at both ends of the lifting tower (50). The lower drive module (60) is slidably connected to the lower ring track (30), and the upper drive module (70) is slidably connected to the upper ring track (10). (50) The lower drive module (60) and the upper drive module (70) can move in a circle along the upper ring track (10) and the lower ring track (30). The lifting module (80) is slidably installed on the lifting tower (50). Several upper support mechanisms (20) are installed on the outer circumference of the upper ring track (10), and several lower support mechanisms (40) are installed on the outer circumference of the lower ring track (30). The upper ring track (10), the lower ring track (30) and the lifting tower (50) are all spliced ​​from multiple segments. The upper support mechanism (20) includes an upper support fixing plate (21). The lower end of the upper support fixing plate (21) is hinged with a first horizontal connecting rod (22) and a second obliquely upward connecting rod (23). The ends of the first connecting rod (22) and the second connecting rod (23) away from the upper support fixing plate (21) are respectively hinged to the upper support column (24). The upper end of the upper support fixing plate (21) is hinged to one end of the upper support short rod (26), and the other end of the upper support short rod (26) is hinged to the second connecting rod (23). The lengths of the first connecting rod (22), the second connecting rod (23), and the upper support short rod (26) are adjustable. The upper support mechanism (20) is connected and fixed to the upper annular track (10) through the upper support fixing plate (21). The lower support mechanism (40) includes a lower support fixing plate (41). The upper end of the lower support fixing plate (41) is hinged with a horizontal third link (42) and a downward oblique fourth link (44). The ends of the third link (42) and the fourth link (44) away from the lower support fixing plate (41) are respectively hinged with support seats (43). The lower end of the lower support fixing plate (41) is hinged to one end of the lower support short rod (45), and the other end of the lower support short rod (45) is hinged to the fourth link (44). The lengths of the third link (42), the fourth link (44) and the lower support short rod (45) are adjustable. The lower support mechanism (40) is connected and fixed to the lower annular track (30) through the lower support fixing plate (41). A floating assembly (90) is installed on the top of the lifting tower (50); the floating assembly (90) includes a guide assembly, an elastic assembly, and a support plate (96). The guide assembly includes multiple guide rods (91) and guide sleeves (92). The lower ends of the guide rods (91) are fixedly installed on the top of the lifting tower (50), and the guide sleeves (92) are installed on the support plate (96). The upper ends of the guide rods (91) slide upward through the support plate (96) and are slidably connected to the guide sleeves (92). The elastic assembly includes a connecting... The connecting rod (93), spring (94), and nut (95) are provided. The lower end of the connecting rod (93) is fixedly installed on the top of the lifting tower (50), and the upper end slides upward through the support plate (96). The spring (94) is fitted on the upper side of the connecting rod (93) on the support plate (96). The nut (95) is screwed onto the top of the connecting rod (93) and abuts against the spring (94). The floating assembly (90) is connected and fixed to the upper drive module (70) through the support plate (96).

2. The circumferential lifting mechanism for demolishing the concrete of the turbine generator runner chamber according to claim 1, characterized in that: The upper annular track (10) and the lower annular track (30) are respectively spliced ​​together by multiple arc segments. The arc segment includes two arc tracks (31) arranged vertically. One end of the arc track (31) is provided with an inner interface (34) and the other end is provided with an outer plug (35). The inner interface (34) and the outer plug (35) are compatible. An arc-shaped inner rack (33) is arranged horizontally between the two arc tracks (31). Several support members (32) are fixedly connected to the upper and lower sides of the arc-shaped inner rack (33) and connected to the two arc tracks (31).

3. The circumferential lifting mechanism for demolishing the concrete of the turbine generator runner chamber according to claim 2, characterized in that: The lower drive module (60) includes a lower drive seat (61), which is fixedly installed on one side of the bottom of the lifting tower (50). A lower drive box (62) is installed on the side of the lower drive seat (61) near the lifting tower (50). A lower track pulley assembly (63) is installed on the side of the lower drive seat (61) away from the lifting tower (50). A lower transmission gear (64) in the lower drive box (62) extends into the side of the lower drive seat (61) away from the lifting tower (50). The lower track pulley assembly (63) clamps the lower annular track (30) from the upper and lower sides. The lower transmission gear (64) meshes with the arc-shaped inner rack (33) of the lower annular track (30). The upper drive module (70) includes an upper drive seat (71), which is fixedly installed on one side of the top of the lifting tower (50). An upper drive box (72) is installed on the side of the upper drive seat (71) near the lifting tower (50). An upper track pulley assembly (73) is installed on the side of the upper drive seat (71) away from the lifting tower (50). An upper transmission gear (74) in the upper drive box (72) extends into the side of the upper drive seat (71) away from the lifting tower (50). The upper track pulley assembly (73) clamps the upper annular track (10) from the upper and lower sides. The upper transmission gear (74) meshes with the arc-shaped inner rack (33) of the upper annular track (10).

4. The circumferential lifting mechanism for demolishing the concrete of the turbine generator runner chamber according to claim 3, characterized in that: A hydraulic motor (75) is installed on the upper side of the upper drive box (72). A drive shaft (78) is rotatably installed inside the lifting tower (50). The lower end of the drive shaft (78) is connected to the lower drive box (62) for transmission, and the upper end is connected to the upper drive box (72) for transmission through a spline pair (76). The hydraulic motor (75) is connected to the upper drive box (72) for transmission. An encoder (77) is installed at the end of the central shaft of the upper transmission gear (74).

5. The circumferential lifting mechanism for demolishing the concrete of the turbine generator runner chamber according to claim 4, characterized in that: The lifting tower (50) is assembled from multiple lifting component frames (51). One end of the lifting component frame (51) is provided with a protrusion (52) and the other end is provided with a concave part (54). The protrusion (52) and the concave part (54) are adapted to each other. The lifting tower (50) is provided with a limiting hole (53) at one end of the protrusion (52) and a limiting component (55) is installed at one end of the concave part (54). A support frame (56) is provided inside the lifting component frame (51). A rotating shaft (57) is rotatably installed on the support frame (56). When the lifting component frame (51) is assembled, the limiting component (55) is inserted into the limiting hole (53) to connect and fix the adjacent lifting component frames (51). The rotating shafts (57) are connected to each other through a spline pair (76) to form a transmission shaft (78).

6. The circumferential lifting mechanism for demolishing the concrete of the turbine generator runner chamber according to claim 5, characterized in that: The lifting module (80) includes a lifting box (81). Inside the lifting box (81), there are limit guide wheel sets (86) at the four corners of the lifting tower (50). A reducer (82) is installed on the outer side of the lifting box (81). The input shaft of the reducer (82) is connected to the output shaft of the lifting hydraulic motor (83). A lifting gear (85) is installed on the output shaft of the reducer (82). A rack (58) is installed longitudinally on the outer side of the lifting tower (50). The lifting gear (85) meshes with the rack (58) for transmission.

7. The method of using the circumferential lifting mechanism for demolishing the concrete of the turbine generator runner chamber as described in claim 6, characterized in that, Includes the following steps: Step 1: Install the lower ring track (30); Based on the flange surface of the foundation ring, mark the installation position of the support seat (43) of the lower support mechanism (40) according to the concrete removal range of the turbine chamber. Weld several support seats (43) in a ring on the inner wall of the tailwater pipe on the lower side of the turbine chamber. Assemble the lower support mechanism (40) on the support seat (43). Then assemble the arc segments into the lower ring track (30) one by one through the lower support mechanism (40). The outer plug (35) of the arc segment is inserted into the inner interface (34) of the adjacent arc segment. The two adjacent segments are locked by the screws of the support member (32). The outer circumference of the lower ring track (30) is connected to the lower support fixing plate (41) of the lower support mechanism (40). Step 2: Install the upper ring track (10); the number of upper support mechanisms (20) is the same as the number of fixed guide vanes of the unit, the upper support column (24) backs against the fixed guide vanes and is welded to the fixed guide vanes, the lower end of the upper support column (24) is welded to the metal surface of the lower liner of the seat ring, the first connecting rod (22) points to the center of the wheel chamber, the arc section of the upper ring track (10) is connected end to end, the adjacent two sections are locked by screws of the support member (32), and the arc sections are assembled into the upper ring track (10) one by one by the upper support mechanism (20). Step 3: Install the lower drive module (60); make the lower track pulley group (63) make close contact with the two arc-shaped tracks (31) of the lower ring track (30) from the upper and lower sides, and make the lower transmission gear (64) mesh with the arc-shaped inner rack (33) of the lower ring track (30); Step 4: Install the lifting tower (50); install the lifting component frame (51) one by one on the basis of the lower drive module (60), and use limit pieces (55) to lock the connection between the upper and lower adjacent frames to ensure that the lifting component frame (51) fits tightly and has no lateral displacement, and to ensure that the rack (58) is smoothly connected; while installing the lifting tower (50), connect the rotating shafts (57) to form the drive shaft (78) through the spline pair (76). Step 5: Install the lifting module (80); Before the lifting tower (50) and the upper drive module (70) are closed, install the lifting module (80), hoist the lifting module (80) and insert it into the lifting tower (50), adjust the limit piece on one side of the reducer (82), push the reducer (82) through the limit piece, so that the lifting gear (85) on the output shaft of the reducer (82) meshes with the rack (58); Step 6: Install the upper drive module (70); Make the upper track pulley group (73) make close contact with the two arc-shaped tracks (31) of the upper ring track (10) from the upper and lower sides, and make the upper transmission gear (74) mesh with the arc-shaped inner rack (33) of the upper ring track (10); Step 7: Install the floating assembly (90); connect the support plate (96) of the floating assembly (90) to the upper drive module (70), and continue to install the lifting tower (50). The guide rod (91) and connecting rod (93) at the top of the lifting tower (50) are inserted into the support plate (96) respectively. Then, install the spring (94) and nut (95) on the connecting rod (93) so that the lifting tower (50) is elastically guided and connected to the upper drive module (70). Step 8: Hoist the mobile hydraulic station (100) to the designated position and restrict its movement, and connect the hydraulic oil pipes (101) to each hydraulic actuator. The lifting tower (50) rotates in a circle along the circular track, and the lifting module (80) moves up and down along the lifting tower (50). Among them, the mobile hydraulic station (100) is an integrated structure of hydraulic station and control system. Step 9: After the project is completed, before dismantling the equipment, move the lifting module (80) to the middle position of the lifting tower (50) and place it in the middle of the single-section lifting component frame (51). Then, in sequence, remove the mobile hydraulic station (100), the upper drive module (70), and dismantle the lifting tower (50), lifting module (80), lower drive module (60), upper and lower ring tracks and their support components from top to bottom.

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