A method for overhauling a flat gate and a hydraulic machine

Abstract

This invention discloses a method for maintaining a planar gate and a hydraulic press, comprising a planar gate for a vertical shaft structure, a hydraulic press, a tie rod assembly, an installation platform, a gate bottom edge, a first locking platform, and a second locking platform. The installation platform, the first locking platform, and the second locking platform are sequentially arranged from top to bottom from the shaft opening. The hydraulic press is detachably installed on the installation platform. The method includes the following steps: S1: Determining the position of the installation platform, the standby position of the hydraulic press, and its working stroke; S2: Determining the elevation of the top of the gate slot and the total length of the tie rod; S3: Determining the elevations of the platform at the top of the gate slot and the locking platform, and setting up a lifting shaft disassembly and installation platform; S4: Determining the stroke of the hydraulic press; S5: Lifting the tie rod and removing the hydraulic press for maintenance. This invention enables the maintenance of the planar gate within the shaft cavity and the maintenance of the vertical hydraulic press without disassembling the tie rod and the planar gate, achieving the purpose of quick and convenient maintenance of the planar gate and the hydraulic press.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering technology, specifically to a method for the maintenance of a planar gate and a hydraulic press. Background Technology

[0002] For planar gates operated by hydraulic presses, they are usually connected to the hydraulic press's cylinder lifting head via tie rods. During maintenance, the planar gate can only be lifted to the maintenance platform after the tie rods are removed. Therefore, the rationality of the tie rod length, maintenance platform, and locking platform location is very important for facilitating the maintenance of planar gates and hydraulic presses.

[0003] Traditionally, the length of the tie rod and the location of the maintenance platform and locking platform are determined based on engineering experience. However, due to significant differences in design parameters such as the size of the plane gate opening, shaft height, and the difference between the normal and check water levels for each project, and the existence of special conditions such as landslides, surges, and earthquake-induced water inrushes, especially considering the different types of hydraulic presses between high and low shafts, their layout also varies. Therefore, the empirical method has certain limitations. Sometimes, it is necessary to repeatedly modify the layout of the plane gate and hydraulic press, which increases the design workload considerably. Furthermore, the lack of systematic correlation in determining the tie rod length, maintenance platform, and locking platform locations can easily lead to excessively long hydraulic press strokes, increasing the plane gate's... The disassembly and assembly of hydraulic presses during maintenance are difficult, and sometimes the water level needs to be lowered or maintenance gates need to be closed to block water if maintenance requirements cannot be met. This significantly prolongs maintenance time and affects the benefits of power generation, ecological water supply, and irrigation, and may even endanger the safety of the project. In addition, for high vertical shafts, the traditional method of maintaining the plane gate at the top of the gate slot requires maintenance personnel and equipment to descend from the top of the gate shaft to the top of the gate slot. In addition to the long descent distance, the lower part of the gate shaft is constantly submerged in water, making it slippery and cumbersome, and posing safety risks. Therefore, the existing technology is not perfect and needs further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a method for the maintenance of a planar gate and a hydraulic press, addressing the aforementioned technical problems.

[0005] The technical solution of this invention:

[0006] An arrangement structure of a planar gate and a hydraulic press includes a planar gate for a vertical shaft structure, a hydraulic press, a tie rod assembly, an installation platform, a bottom edge of the gate, a first locking platform, and a second locking platform. The installation platform, the first locking platform, and the second locking platform are arranged sequentially from top to bottom from the shaft opening. The hydraulic press is detachably installed on the installation platform. The planar gate is connected to the bottom of the hydraulic press via the tie rod assembly. The installation platform is also provided with a pulley assembly for assisting in transfer. The first locking platform and the second locking platform are provided with locking devices for locking the tie rod assembly or the planar gate. Hanging plates are provided on the upstream and downstream sides of the tie rod assembly.

[0007] The tie rod assembly includes several tie rod sections and a lifting shaft, with the lifting shaft located at both ends of the tie rod.

[0008] The locking device includes a base and a locking beam disposed on the base.

[0009] A method for overhauling a planar gate and a hydraulic press includes the following steps:

[0010] S1: Determine the installation platform location, the standby position of the hydraulic press, and the working stroke. Determine the installation platform location of the hydraulic press cylinder frame based on the principle that the cylinder frame is above the water level, and determine the standby position and working stroke of the hydraulic press based on the principle that the bottom edge of the gate is not affected by the water flow.

[0011] S2: For high and medium-low vertical shafts, determine the top elevation of the gate slot and the total length of the tie rod for the planar gate;

[0012] S3: For high and medium-low vertical shafts, determine the platform at the top of the door slot, lock the platform elevation, and set up a platform for lifting shaft disassembly and installation;

[0013] S4: Determine the hydraulic press stroke for high and medium-low vertical shafts;

[0014] S5: Lift the tie rod and remove the hydraulic press for maintenance;

[0015] S6: Lift the plane gate to the locking platform or the platform at the top of the plane gate slot and perform maintenance.

[0016] In step S5, the tie rod adopts two different lengths of tie rod structure in high vertical shafts: long tie rod and short tie rod, while in medium and low vertical shafts, tie rod structure of the same length is adopted.

[0017] In step S2, for high vertical shafts: determine the top elevation of the gate slot of the planar gate based on its position above the top of the planar gate when it is in standby state; determine the total length of the distance between the lifting points at both ends of the tie rod based on the length between the center of the hydraulic cylinder head and the center of the lifting lug of the hydraulic press when the planar gate is in standby state; determine the structural dimensions of the long tie rod according to the principle that the distance between the lifting points at both ends is not greater than the working stroke of the hydraulic press; and set one short tie rod as a closed connection structure between the lifting points at both ends of the tie rod.

[0018] Both the long and short pull rods are equipped with a lifting point and a locking position. The distance from the lifting point of the long pull rod to the locking position of the long pull rod is the same as the distance from the lifting point of the short pull rod to the locking position of the short pull rod.

[0019] In step S2, for medium and low vertical shafts, the elevation of the top of the gate slot of the plane gate is determined by more than 1.5 times the height of the plane gate opening. The total length of the distance between the lifting points at both ends of the tie rod is determined by the length of the center of the hydraulic cylinder head and the center of the lifting lug of the hydraulic press when the plane gate is in standby state. When the bottom of the plane gate is fixed on the locking beam at the top of its gate slot, the position of the connecting shaft between the tie rod and the plane gate is determined as the position of the second locking platform.

[0020] In step S3, for high vertical shafts: the elevation of the first locking platform is determined by the position of the top section long tie rod when the plane gate is in standby state; the elevation of the second locking platform is determined by the position of the third section long tie rod that can be locked from top to bottom and the position that can completely disengage the top section long tie rod from the second section long tie rod; and a platform for disassembling and installing the lifting shaft is set below the upper lifting point of the second section long tie rod.

[0021] In step S3, for medium and low vertical shafts: when the plane gate is locked to the second locking platform, and the hydraulic press cylinder head is fully retracted, the maximum length of the tie rod is determined by ensuring that the outer edges of both ends of the tie rod do not contact the hydraulic press cylinder head and the outer edges of the plane gate lifting lugs. The distance from the lifting points at both ends of the tie rod to the total length is divided into sections that are less than the maximum length of the tie rod to determine the distance from the center of the upper lifting point of the tie rod to the lower support surface of the locking plate. The elevation of the first locking platform is determined by the position where the hydraulic press cylinder head and the tie rod can be completely disengaged when the top section of the tie rod is locked.

[0022] In step S4, for high vertical shafts, the hydraulic press stroke is determined by the maximum value between the full extension stroke of the hydraulic press when the hydraulic press cylinder head can connect with the tie rod head of the second long tie rod in the locked state of the third long tie rod, and the full retraction stroke of the hydraulic press when the top long tie rod is in the locked state of the first locking platform, at which point the hydraulic press cylinder head is completely disengaged from it.

[0023] In step S4, for medium and low vertical shafts, the maximum stroke is the full retraction stroke when the hydraulic cylinder head of the hydraulic press is completely disengaged from the first locking platform when the top section tie rod is in the locked state.

[0024] In step S5, for high vertical shafts, long tie rods with a reserved short tie rod as the closed dimension are evenly arranged with the center distance from the upper lifting point to the lower lifting point being similar to the working stroke of the hydraulic press to reduce the total number of tie rods. The elevation of the first locking platform is determined according to the principle that the hydraulic cylinder head of the hydraulic press can be completely disengaged from the tie rod when the top tie rod is locked. The elevation of the second locking platform is determined according to the principle that the top long tie rod can be completely disengaged from the second long tie rod when the third long tie rod is locked. The tie rods are then lifted by the hydraulic press and dismantled section by section for maintenance.

[0025] In step S5, for medium and low vertical shafts, the elevation of the second locking platform is determined by first meeting the maintenance height requirements of the planar gate in the shaft cavity, and then the elevation of the first locking platform is determined by the position where the hydraulic cylinder head of the hydraulic press can be completely disengaged from the tie rod when locking the top section tie rod. The tie rod is then lifted by the hydraulic press and dismantled section by section for maintenance.

[0026] In step S6, for high vertical shafts, when overhauling the plane gate, after locking the third section of the long tie rod on the second locking platform, the lifting shafts of the top section of the long tie rod and the second section of the long tie rod are removed on the platform for dismantling and installing the lifting shaft. The long tie rods are then dismantled section by section to the bottom section by using lifting equipment to move the top section of the long tie rod to the storage location. The distance from the locking position of the plane gate to the center of its lifting head is not less than the distance between the lifting points at both ends of the long tie rod. Then, the plane gate is lifted as a whole onto the locking beam of the second locking platform using a hydraulic press.

[0027] In step S6, for medium and low vertical shafts, when inspecting the plane gate, first lock the second tie rod connected to the top tie rod to the second locking platform, then detach the top tie rod from the second tie rod, use a hydraulic press to lift the top tie rod to the locking beam of the first locking platform and then detach it from the locking beam, and then use lifting equipment to move the top tie rod to the storage location. Repeat the above steps until all tie rods are removed, and then place the plane gate in the inspection chamber between the second locking platform and the first locking platform for inspection and maintenance.

[0028] The lifting equipment uses an electric hoist, and a track matching the electric hoist is set at the bottom of the hydraulic cylinder frame.

[0029] The beneficial effects of this invention are:

[0030] This invention enables the maintenance and repair of planar gates within a vertical shaft cavity, and allows for the complete disengagement of the hydraulic press's cylinder head from the tie rod. A flow-oriented design with dual locking platforms, one for locking the hydraulic press and the other for locking the planar gate, determines the elevation and structure of the installation, locking, and disassembly platforms for the cylinder frame in the vertical shaft. This achieves quick and convenient maintenance of the planar gate and hydraulic press, improving work efficiency. Addressing the challenges of long tie rods and extensive installation and disassembly work in high vertical shafts, this invention allows for maintenance of the hydraulic press without requiring the gate to be closed for water blocking or the planar gate and tie rod to be removed. It enables maintenance of the planar gate within the gate cavity at the elevations of the first and second locking platforms, effectively reducing the descent distance for maintenance personnel and equipment, thus improving maintenance efficiency while ensuring safety. Addressing the challenges of low- and medium-height vertical shafts and short total length of tie rods, this invention enables maintenance of the hydraulic press without requiring the gate to be closed for water blocking or the plane gate and tie rods to be removed. It also allows for maintenance of the plane gate without dismantling the top hydraulic press and enables maintenance of the plane gate within the gate shaft cavity of the platform at the top of the gate slot and the second locking platform, thus improving maintenance efficiency. In this invention, the cylinder frame is positioned above the highest water level, effectively protecting the oil pump motor unit and electrical control equipment. The plane gate's standby position is determined based on the principle that its bottom edge is unaffected by water flow, effectively preventing the plane gate from swaying under water flow and causing vibration of the hydraulic press induced by the tie rods, which could lead to damage. This invention facilitates the hoisting and removal of the tie rods, effectively improving the efficiency of tie rod installation and disassembly. Attached Figure Description

[0031] Figure 1 This is a partial schematic diagram of the hydraulic cylinder frame platform, the total length of the tie rod, and the working stroke of the hydraulic press in the high vertical shaft of the present invention;

[0032] Figure 2 This is a partial schematic diagram illustrating the determination of the lengths of the long and short tie rods in the high vertical shaft of the present invention;

[0033] Figure 3 This is a partial schematic diagram illustrating the determination of the position of the first locking platform at the top of the high vertical shaft according to the present invention;

[0034] Figure 4 This is a partial schematic diagram of the present invention for determining the maximum retraction stroke of the upper part of the hydraulic cylinder of a high vertical shaft and for the scheme of separately repairing a vertical hydraulic press;

[0035] Figure 5 This is a partial schematic diagram of the maximum extension stroke of the hydraulic cylinder in the vertical shaft of the present invention, and the positions of the second locking platform and the disassembly and assembly shaft of the vertical shaft top tie rod;

[0036] Figure 6 This is a partial schematic diagram of the second locking platform for determining the top tie rod of the vertical shaft and the position of the disassembly and assembly of the lifting shaft in the high vertical shaft of the present invention;

[0037] Figure 7 This is a partial schematic diagram of the maintenance process of the high vertical shaft plane gate of the present invention, in which a long tie rod is placed on the first locking platform for storage by an electric hoist;

[0038] Figure 8 This is a partial schematic diagram of the maintenance process of the high vertical shaft plane gate of the present invention, in which a hydraulic press is used to dismantle the long tie rod section by section until the bottom section of the long tie rod is lifted and fixed to the second locking platform;

[0039] Figure 9 This is a partial schematic diagram showing the process of using a hydraulic press to lift a short tie rod to the second locking platform for fixation during the maintenance of the high vertical shaft plane gate of the present invention;

[0040] Figure 10 This is a partial schematic diagram of the maintenance process of the high vertical shaft plane gate of the present invention, in which a hydraulic press is used to lift the plane gate to the second locking platform via a tie rod;

[0041] Figure 11 This is a partial schematic diagram showing the process of using a hydraulic press to lift the plane gate to the second locking platform for fixation during the maintenance of the high vertical shaft plane gate of the present invention;

[0042] Figure 12 This is a partial schematic diagram of the maintenance process of the high vertical shaft plane gate of the present invention, in which the plane gate is lifted by a hydraulic press to the second locking platform for fixing, and then the last long tie rod is placed on the first locking platform for storage by an electric hoist.

[0043] Figure 13 This is a partial schematic diagram showing the process of maintaining the high vertical shaft plane gate of the present invention, in which a hydraulic press is used to completely lift the plane gate to the second locking platform for fixation via a short tie rod;

[0044] Figure 14 This is a partial schematic diagram of the maintenance process of the high vertical shaft plane gate of the present invention, in which a hydraulic press is used to lift the short tie rod to the first locking platform for fixing and then the plane gate is maintained.

[0045] Figure 15 This is a partial schematic diagram of the process of using a hydraulic press to lift a short tie rod to the first locking platform to fix the upper part of the maintenance plane gate in the high vertical shaft of the present invention.

[0046] Figure 16 This is a partial schematic diagram showing the process of using an electric hoist to lift a short tie rod to the first locking platform for storage during the maintenance of the high vertical shaft plane gate of the present invention;

[0047] Figure 17 This is a partial schematic diagram of the maintenance process of the planar gate of the present invention, in which a hydraulic press is used to lift the planar gate to the first locking platform for fixation and then carry out maintenance.

[0048] Figure 18 This is a partial schematic diagram of the solution of the present invention for water inrush conditions such as landslide surge and earthquake;

[0049] Figure 19 This is a schematic diagram of the hydraulic cylinder frame platform for determining the low vertical shaft in this invention;

[0050] Figure 20 This is a schematic diagram illustrating the determination of the total length of the tie rod and the working stroke of the hydraulic press in the low vertical shaft of this invention;

[0051] Figure 21 This is a schematic diagram illustrating the determination of the position of the second locking platform in the low vertical shaft of this invention;

[0052] Figure 22 This is a schematic diagram illustrating the determination of the maximum distance between the two ends of the tie rod in a low vertical shaft according to the present invention;

[0053] Figure 23 This is a schematic diagram of the process of determining the position of the first locking platform in the low vertical shaft in this invention;

[0054] Figure 24 This is a schematic diagram illustrating the determination of the position of the first locking platform in the low vertical shaft of the present invention;

[0055] Figure 25 This is a schematic diagram of the first locking platform in the low vertical shaft of the present invention disengaging the vertical hydraulic press from the tie rod for maintenance;

[0056] Figure 26 This is a schematic diagram illustrating the maintenance process of the low vertical shaft plane gate in this invention, in which the upper second section of the tie rod is lowered to the second locking platform and fixed using a hydraulic press.

[0057] Figure 27 This is a schematic diagram illustrating the maintenance process of the low vertical shaft plane gate in this invention, in which a hydraulic press is used to detach the top section tie rod from the second section tie rod on the second locking platform.

[0058] Figure 28 This is a schematic diagram illustrating the maintenance process of the low vertical shaft plane gate in this invention, in which the top section tie rod is detached from the hydraulic press head and removed using a temporary lifting tool on the first locking platform;

[0059] Figure 29 This is a schematic diagram illustrating the process of lifting the top section tie rod to the first locking platform for storage using temporary lifting tools during the maintenance of the low vertical shaft plane gate in this invention.

[0060] Figure 30 This is a schematic diagram illustrating the maintenance process of the low vertical shaft plane gate in this invention, in which the second section of the tie rod is detached from the hydraulic press head and removed using a temporary lifting tool on the first locking platform;

[0061] Figure 31 This is a schematic diagram illustrating how the second section of the tie rod is lifted to the first locking platform for storage using a temporary lifting tool during the maintenance process of the low vertical shaft plane gate in this invention.

[0062] Figure 32This is a schematic diagram illustrating the maintenance process of the low vertical shaft plane gate in this invention, in which the third section of the tie rod is detached from the hydraulic press head and removed using a temporary lifting tool on the first locking platform;

[0063] Figure 33 This is a schematic diagram illustrating the process of lifting the third section of the tie rod to the first locking platform for storage using a temporary lifting tool during the maintenance of the low vertical shaft plane gate in this invention;

[0064] Figure 34 This is a schematic diagram illustrating the maintenance process of the low vertical shaft planar gate in this invention, in which the planar gate is completely lifted to the second locking platform and fixed by a hydraulic press.

[0065] Figure 35 This is a schematic diagram illustrating the maintenance process of the low vertical shaft plane gate in this invention, in which the bottom section tie rod is detached from the hydraulic press head and removed using a temporary lifting tool on the first locking platform;

[0066] Figure 36 This is a schematic diagram illustrating the process of lifting the bottom section tie rod to the first locking platform for storage using temporary lifting tools during the maintenance of the low vertical shaft plane gate in this invention;

[0067] Figure 37 This is a schematic diagram illustrating the maintenance process of the low vertical shaft planar gate in this invention, in which the planar gate is lifted to the first locking platform and fixed for maintenance using a hydraulic press.

[0068] Attached reference numerals: 1-High vertical shaft, 2-Flat gate, 3-Hydraulic press, 4-Installation platform, 5-Gate bottom edge, 6-Gate lintel bottom edge, 7-Water filling valve, 8-Pulley, 9-Lifting plate, 10-Hydraulic cylinder lifting head, 11-Pulley lifting head, 12-Bottom sill, 13-Gate slot top, 14-Short pull rod, 15-Long pull rod, 16-Lifting point, 17-Locking position, 18-Top section long pull rod, 19-First locking platform, 20-Lock Fixed beam, 21-Third section long tie rod, 22-Second section long tie rod, 23-Second locking platform, 24-Platform, 25-Lower lifting point, 26-Lifting shaft, 27-Top platform of high vertical shaft, 28-Hydraulic cylinder frame, 29-Electric hoist, 30-Railway, 31-Medium and low vertical shaft, 32-Top section tie rod, 33-Second section tie rod, 34-Lifting equipment, 35-Third section tie rod, 36-Bottom section tie rod, 37-Maintenance chamber. Detailed Implementation

[0069] refer to Figures 1-37An arrangement structure of a planar gate and a hydraulic press includes a planar gate 2 for a vertical shaft structure, a hydraulic press 3, a tie rod assembly, an installation platform 4, a gate bottom edge 5, a first locking platform 19, and a second locking platform 23. The installation platform 4, the first locking platform 19, and the second locking platform 23 are arranged sequentially from top to bottom from the vertical shaft opening. The hydraulic press 3 is detachably installed on the installation platform 4. The planar gate 2 is connected to the bottom of the hydraulic press 3 through the tie rod assembly. The installation platform 4 is also provided with a pulley assembly for auxiliary transfer. The first locking platform 19 and the second locking platform 23 are provided with locking devices for locking the tie rod assembly or the planar gate 2. The tie rod assembly has lifting plates 9 on its upstream and downstream sides for easy hoisting.

[0070] In this application, the hydraulic press 3 is a vertical hydraulic press 3. The cylinders of the vertical hydraulic press 3 are either sinking floating type or high cantilever fixed type. The vertical hydraulic press 3 of the high vertical shaft 1 adopts the sinking floating cylinder structure, while the vertical hydraulic press 3 of the medium and low vertical shaft 31 adopts the high cantilever fixed cylinder.

[0071] The tie rod assembly includes several tie rod sections 8 and a lifting shaft 26. The lifting shaft 26 is located at both ends of the tie rod 8. In the high vertical shaft 1, the tie rod 8 adopts two different lengths of tie rod structure: long tie rod 15 and short tie rod 14. The short tie rod 14 is used to compensate for misalignment. In the medium and low vertical shaft 31, the tie rod 8 adopts the same length of tie rod structure.

[0072] The locking device includes a base and a locking beam 20 disposed on the base. This arrangement is mainly for facilitating the locking of the planar gate 2 and the pull rod 8.

[0073] In this application, a high vertical shaft refers to a vertical shaft with a height of more than 50m from the top of the gate to the bottom sill, and a medium-low vertical shaft refers to a vertical shaft with a height of less than 50m from the top of the gate to the bottom sill.

[0074] Long tie rods refer to tie rods with a length exceeding 6m, while short tie rods refer to tie rods with a length of less than 4m. Tie rod 8 in this application is a normal tie rod with a length of 4-6m.

[0075] A method for overhauling a planar gate and a hydraulic press includes the following steps:

[0076] S1: Determine the installation platform location, the standby position of the hydraulic press, and the working stroke. Determine the installation platform 4 of the hydraulic press 3 based on the principle that the cylinder frame 28 is above the water level. Determine the standby position and working stroke of the hydraulic press 3 based on the principle that the bottom edge 5 of the gate is not affected by the water flow.

[0077] S2: For high vertical shaft 1 and medium-low vertical shaft 31, determine the elevation of the top 13 of the gate slot of the plane gate 2 and the total length of the tie rod 8;

[0078] For the high vertical shaft 1: the elevation of the top 13 of the gate slot of the plane gate 2 is determined according to the position of the plane gate 2 in the standby state. The total length of the distance between the two lifting points of the tie rod 8 is determined according to the length of the center of the hydraulic cylinder head 10 of the hydraulic press 3 and the center of its lifting lug when the plane gate 2 is in the standby state. The structural dimensions of the long tie rod 15 are determined according to the principle that the distance between the two lifting points is not greater than the working stroke of the hydraulic press 3. A short tie rod 14 is set as a closed connection structure between the two lifting points of the tie rod 8.

[0079] Both the long pull rod 15 and the short pull rod 14 are provided with an upper lifting point 16 and a locking position 17. The distance from the upper lifting point 16 of the long pull rod 15 to the locking position 17 of the long pull rod 15 is the same as the distance from the upper lifting point 16 of the short pull rod 14 to the locking position 17 of the short pull rod 14.

[0080] For the low-to-medium vertical shaft 31, the elevation of the top 13 of the gate slot of the planar gate 2 is determined to be greater than 1.5 times the height of the orifice of the planar gate 2. The total length of the distance between the lifting points at both ends of the tie rod 8 is determined based on the length between the center of the hydraulic cylinder lifting head 10 and the center of its lifting lug when the planar gate 2 is in standby state. The position of the connecting shaft 26 between the tie rod 8 and the planar gate 2 is determined as the position of the second locking platform 23 when the bottom of the planar gate 2 is fixed on the locking beam 20 at the top 13 of its gate slot. The height of the maintenance cavity 37 between the top 13 of the gate slot and the second locking platform 23 meets the maintenance space requirements of the planar gate 2.

[0081] S3: For high vertical shaft 1 and medium-low vertical shaft 31, determine the platform at the top of the door slot, lock the platform elevation, and set up the lifting shaft 26 to disassemble and install the platform 24;

[0082] For the high vertical shaft 1: When the plane gate 2 is in standby state, the position of the top section long tie rod 18 can be locked to determine the elevation of the first locking platform 19. The position of the third section long tie rod 21 can be locked from top to bottom and the top section long tie rod 18 can be completely separated from the second section long tie rod 22 to determine the elevation of the second locking platform 23. A platform 24 for disassembly and installation of the lifting shaft 26 is set below the upper lifting point 16 of the second section long tie rod 22.

[0083] For the medium and low vertical shaft 31: When the plane gate 2 is locked to the second locking platform 23, and the hydraulic cylinder head 10 of the hydraulic press 3 is fully retracted, the maximum length of the tie rod 8 is determined by the fact that the outer edges of both ends of the tie rod 8 do not contact the hydraulic cylinder head 10 of the hydraulic press 3 and the outer edge of the lifting lug of the plane gate 2, respectively. The distance from the lifting points at both ends of the tie rod 8 to the total length is divided into sections that are less than the maximum length of the tie rod 8. The distance from the center of the upper lifting point 16 of the tie rod 8 to the lower support surface of the locking plate is then determined. The elevation of the first locking platform 19 is determined by the position where the hydraulic cylinder head 10 of the hydraulic press can completely disengage from the tie rod 8 when the top section tie rod 32 is locked.

[0084] S4: For high vertical shaft 1 and medium-low vertical shaft 31, determine the stroke of hydraulic press 3;

[0085] For the high vertical shaft 1, the stroke of the hydraulic press 3 is determined by the maximum value between the full extension stroke of the hydraulic press 3 when the cylinder head 10 of the hydraulic press 3 can be connected to the rod head 11 of the second long rod 22 when the third long rod 21 is locked, and the full retraction stroke when the cylinder head 10 of the hydraulic press 3 is completely disengaged from the first locking platform 19 when the top long rod 18 is locked.

[0086] For medium and low vertical shafts 31, the maximum stroke is the full retraction stroke when the top section tie rod 32 is in the locked state of the first locking platform 19, at which point the cylinder lifting head 10 of the hydraulic press 3 is completely disengaged from it. This satisfies the requirement to disassemble the cylinder lifting head 10 of the hydraulic press 3 after the top section tie rod 32 is fixed on the first locking platform 19.

[0087] S5: Lift tie rod 8 and remove the hydraulic press for maintenance;

[0088] The tie rod 8 adopts two different lengths of tie rod structure in the high vertical shaft 1: long tie rod 15 and short tie rod 14, while the tie rod structure of the same length is adopted in the medium and low vertical shaft 31.

[0089] Considering the large total length of the tie rods 8 in the high vertical shaft 1 and the large workload of installation and dismantling, a short tie rod 14 is reserved as the closed dimension, and long tie rods 15 with a center distance from the upper lifting point 16 to the lower lifting point 25 that is similar to the working stroke of the hydraulic press 3 are evenly distributed to reduce the total number of tie rods 8. The elevation of the first locking platform 19 is determined based on the principle that the hydraulic cylinder lifting head 10 of the hydraulic press 3 can be completely disengaged from the tie rod 8 when the top tie rod 32 is locked. The elevation of the top long tie rod 15 is also determined based on the principle that the top long tie rod 15 can be completely disengaged from the tie rod 8 when the third long tie rod 21 from top to bottom is locked. The elevation of the second locking platform 23 can be determined by completely separating the second long tie rod 22, which realizes the requirement of repairing the hydraulic press 3 without the need to inspect the gate closure and water blocking and without lifting out the plane gate 2 and tie rod 8. The method also allows the tie rod 8 to be lifted by the hydraulic press 3 and dismantled section by section for repair. This method realizes the requirement of repairing the plane gate 2 in the gate well cavity between the elevation of the first locking platform 19 and the second locking platform 23, effectively reducing the descent distance of maintenance personnel and equipment, and ensuring safety while improving maintenance efficiency.

[0090] In response to the characteristics of the low height of the medium and low vertical shaft 31 and the short total length of the tie rod 8, the elevation of the second locking platform 23 is determined by first meeting the maintenance height requirements of the plane gate 2 in the gate shaft cavity. Then, the elevation of the first locking platform 19 is determined by the position where the hydraulic cylinder lifting head 10 of the hydraulic press 3 can completely disengage from the tie rod 8 when locking the top tie rod 32. This method achieves the requirement of maintaining the hydraulic press 3 without needing to maintain the gate closure and blocking water or without lifting out the plane gate 2 and tie rod 8, and also meets the requirement that the top hydraulic press 3 does not need to be removed during the operation and maintenance of the plane gate 2. The tie rod 8 is lifted by the hydraulic press 3 and the tie rod 8 is removed section by section for maintenance. This method achieves the requirement of maintaining the plane gate 2 in the gate shaft cavity between the top platform 13 of the gate slot and the second locking platform 23, thereby effectively improving the maintenance efficiency.

[0091] S6: Lift the planar gate 2 to the locking platform or the platform at the top of the planar gate slot and perform maintenance.

[0092] For the high vertical shaft 1, when inspecting the plane gate 2, after locking the third section of the long tie rod 21 on the second locking platform 23, the lifting shafts 26 of the top section of the long tie rod 18 and the second section of the long tie rod 22 are removed from the platform 24 where the lifting shaft 26 is dismantled and installed. The top section of the long tie rod 18 is moved to the storage location by the lifting equipment 34. The long tie rods 15 are dismantled section by section until the bottom section. A locking position 17 is set on the plane gate 2 so that the center dimension of its lifting head is not less than the distance between the lifting points at both ends of the long tie rod 15. Then, the plane gate 2 is lifted as a whole onto the locking beam 20 of the second locking platform 23 by the hydraulic press 3. This achieves the requirement of dismantling the short tie rod 14 and inspecting and maintaining the plane gate 2 in the gate cavity of the first locking platform 19 and the second locking platform 23.

[0093] The lifting equipment 34 uses an electric hoist 29, and a track 30 matching the electric hoist 29 is set at the bottom of the hydraulic cylinder frame 28.

[0094] Specifically, depending on the project conditions and layout space requirements, the lifting equipment 34 may also employ one or a combination of several types of equipment, such as gantry cranes, winches, trolleys, maintenance bridge cranes, and pulley blocks.

[0095] For the medium and low vertical shaft 31, when inspecting the plane gate 2, first lock the second tie rod 33 connected to the top tie rod 32 to the second locking platform 23, then detach the top tie rod 32 from the second tie rod 33, use a hydraulic press 3 to lift the top tie rod 32 to the first locking platform 19 and fix it to the locking beam 20, then detach it from the first locking platform 19. Then use the lifting equipment 34 to move the top tie rod 32 to the storage location. Repeat the above steps until all tie rods 8 are removed, and then place the plane gate 2 in the inspection chamber 37 between the second locking platform 23 and the first locking platform 19 for inspection and maintenance.

[0096] Specifically, the mounting platform 4 of the hydraulic press 3's cylinder frame 28 is located above the highest water inrush point.

[0097] The working stroke L of the hydraulic cylinder of hydraulic press 3 w The working stroke L of the hydraulic cylinder is determined by the sum of the height H of the orifice 2 of the planar gate, the height △h from the bottom edge to the bottom edge 6 of the lintel in the standby state, and the pressure stroke △L of the water filling valve 7. w =H + Δh + ΔL, Δh ≥ 0.2m;

[0098] The distance L from the lifting points at both ends of the tie rod 8 to the total length is determined by the length of the center of the hydraulic cylinder lifting head 10 and the center of its lifting lug when the planar gate 2 is in standby state;

[0099] When the plane gate 2 is closed, the height from the center of its lifting lug to its bottom edge is H. m When the plane gate 2 is in its free state, the height from the center of its lifting lug to its bottom edge is H. m `;

[0100] H m =H m `-△L-δ, where δ is the bottom water seal compression amount, and △L is the pressure equalization stroke of the water filling valve 7;

[0101] The distance from the center of the hydraulic cylinder lifting head 10 of the hydraulic press 3 to its outer edge is R. d When the elevation of the mounting platform 4 of the hydraulic cylinder frame 28 is ▽y, the distance from the center of the hydraulic cylinder lifting head 10 to the hydraulic cylinder standby position is L. y ;

[0102] If the elevation of the bottom sill 12 of the planar gate 2 is ▽d, then the distance from the two ends of the tie rod 8 to the total length L = ▽ y -▽dL y -H-△hH m `.

[0103] When the planar gate 2 is installed in the high vertical shaft 1:

[0104] The elevation of the top of the gate slot of the planar gate 2 is 13 m, which is determined according to its position above the top of the gate when it is in standby state;

[0105] The tie rod 8 is arranged with a short tie rod 14 reserved as the closed dimension and a set of long tie rods 15 with a center distance between the upper lifting point 16 and the lower lifting point 25 that is similar to the working stroke of the hydraulic press 3.

[0106] The distance between the two suspension points of the long tie rod 15 is L. c = (0.7-1)L w The distance L between the two suspension points of the short tie rod 14 d = (L / L) c -[L / L c ])L c， In the formula, [] represents the floor function;

[0107] The distance L from the center of the upper suspension point 16 of the long tie rod 15 and the short tie rod 14 to the locking position 17 ds Similarly, the distance from the center of the upper suspension point 16 of the long tie rod 15 and the short tie rod 14 to the upper outer edge is d1, and the distance from the center of the lower suspension point 25 of the long tie rod 15 and the short tie rod 14 to the lower outer edge is d2.

[0108] The center dimension L of the locking position 17 of the plane gate 2 to the lower suspension point 25 of the bottom section tie rod is... ds The distance between the two end suspension points of the long tie rod should not be less than 15mm. c ;

[0109] When the planar gate 2 is in standby mode, it can lock the position of the top section tie rod 32 to determine the elevation of the first locking platform 19 ▽sd1;

[0110] Planar gate 2 locking beam 20 height h s , ▽sd1=▽yL y -L ds -h s ;

[0111] Hydraulic press 3 full retraction maximum stroke L smax =L+d1+R d +δ1, where δ1 is the gap between the outer edge of the lifting point 16 on the tie rod 8 and the oil cylinder lifting head 10 of the hydraulic press 3;

[0112] The high vertical shaft 1 can lock the third long tie rod 21 in a top-to-bottom sequence and completely disengage the top long tie rod 18 from the second long tie rod 22. The elevation of the second locking platform 23 is determined by ▽sd2, where ▽sd2 = ▽sd1 - 2L. c -d1-d2-δ1;

[0113] A dismantling and installation platform 4 for the lifting shaft 26 is installed at a suitable position below the center of the upper lifting point 16 of the second long tie rod 22 in the high vertical shaft 1. The elevation of the dismantling and installation platform 4 for the lifting shaft 26 is ▽c, and the distance between ▽c and the center of the upper lifting point 16 of the second long tie rod 22 is h. c h c =-1~3m;

[0114] The maximum stroke of the hydraulic press 3 when fully extended is such that the cylinder lifting head 10 can be connected to the lifting head 11 of the second long tie rod 22 when the second locking platform 23 is locked. s ` max= L c +d1+d2+δ2, where δ2 is the gap between the outer edge of the lower suspension point 25 of the second tie rod 33 and the outer edge of the upper suspension point 16 of the third tie rod 35;

[0115] Hydraulic press 3 maximum stroke L max =MAX(Lsmax L s ` max );

[0116] When the hydraulic press 3 needs maintenance, after the top section tie rod 32 is fixed on the locking beam 20 of the first locking platform 19, the connecting shaft 26 between the hydraulic press 3 and the top section tie rod 32 is removed, and the hydraulic press 3 is lifted out of the shaft for maintenance by the lifting equipment 34. After the hydraulic press 3 is maintained, it is reconnected to the top section tie rod 32 after the assembly is completed on the mounting platform 4 of the cylinder frame 28.

[0117] When the planar gate 2 needs maintenance, after locking the third long tie rod 21 on the second locking platform 23, the first tie rod 8 and the second tie rod 33 are removed from the lifting shaft 26 on the disassembly and installation platform 4. The tie rod 8 is then removed section by section by section by the method of moving the first tie rod 8 to the storage location using temporary or simple lifting equipment 34. The planar gate 2 is then hoisted as a whole onto the locking beam 20 of the second locking platform 23 and fixed, or its middle and upper parts are hoisted onto the locking beam 20 of the first locking platform 19 and fixed for maintenance. After the planar gate 2 is maintained, it is placed back onto the second locking platform 23. The short tie rod 14 and the long tie rod 15 are then connected to the planar gate 2 section by section by temporary or simple lifting equipment 34 and lowered to the standby position of the planar gate 2.

[0118] When the planar gate 2 is installed in the medium-low vertical shaft 31:

[0119] The elevation of the top of the gate slot of planar gate 2 is 13 m, which is determined to be greater than 1.5 times the orifice height H of planar gate 2.

[0120] The position of the second locking platform 23, elevation ▽sd2`, is determined by the position of the connecting shaft 26 between the tie rod 8 and the plane gate 2 when the bottom of the plane gate 2 is fixed on the locking beam 20 at the top of the gate slot 13, ▽sd2` = ▽m` + H m +hs-h c `, hc` is the distance from the center of the lifting point of the plane gate 2 to the elevation ▽sd2` of the second locking platform 23, hc`=0~2m;

[0121] Hydraulic press 3 maximum stroke L` max =L+d1+R d +δ1;

[0122] When the hydraulic press 3 is in its fully retracted state, the distance from the elevation ▽y of the mounting platform 4 of the cylinder frame 28 to the center of the cylinder lifting head 10 is L. y `=L y -d1-R d -δ1;

[0123] When the planar gate 2 is locked to the second locking platform 23 and the hydraulic cylinder head 10 of the hydraulic press 3 is in the fully retracted state, the maximum distance L between the center of the upper lifting point 16 of the planar gate 2 and the center of the hydraulic cylinder head 10 of the hydraulic press 3 is... pymax =▽y-▽sd2`-L y -hc;

[0124] The maximum length of the tie rod 8 is determined by ensuring that its outer edges at both ends do not contact the outer edges of the hydraulic cylinder lifting head 10 of the hydraulic press 3 and the lifting lugs of the planar gate 2, respectively. The maximum distance L between the lifting points at both ends of the tie rod 8 is also determined. cmax =L pymax -d1-d2-R d -d1`-δ 1- δ2, d1` are the distances from the center of the gate's upper lifting point 16 to its outer edge;

[0125] The number of sections n of lever 8 is greater than or equal to [L / L]. cmax +1;

[0126] The distance between the two suspension points of the tie rod 8 and L` c =L / n

[0127] The position of the top section tie rod 32 can be determined when the first locking platform 19 elevation ▽sd1` is in standby state according to the plane gate 2;

[0128] When the hydraulic press 3 needs maintenance, after the top section tie rod 32 is fixed to the locking beam 20 at the first locking platform 19 elevation ▽sd1`, the connecting shaft 26 between the hydraulic press 3 and the top section tie rod 32 is removed, and the hydraulic press 3 is lifted out of the shaft for maintenance by the lifting equipment 34. After the hydraulic press 3 is maintained, it is reconnected to the top section tie rod 32 after being assembled on the mounting platform 4 of the cylinder frame 28.

[0129] When the aforementioned planar gate 2 is being overhauled, the first section of tie rod 8 connected to the top section tie rod 32 is first locked to the second locking platform 23. Then, the top section tie rod 32 is detached from the first section tie rod 8. The top section tie rod 32 is lifted to the locking beam 20 of the first locking platform 19 and fixed thereafter. Then, the top section tie rod 32 is moved to the storage location using temporary or simple lifting equipment 34. The above steps are repeated until all tie rods 8 are removed. The planar gate 2 is then placed in the maintenance chamber 37 between the second locking platform 23 and the first locking platform 19 for maintenance.

[0130] The bottom of the hydraulic cylinder frame 28 has a track 30 with a temporary or simple lifting device 34 set perpendicular to the water flow direction.

[0131] For high vertical shaft 1, the following is a detailed explanation through a specific case:

[0132] refer to Figures 1-17 A planar gate 2 is installed in the high vertical shaft 1, and the planar gate 2 is operated by a hydraulic press 3.

[0133] The mounting platform 4 of the cylinder frame 28 of the hydraulic press 3 is located above the check water level;

[0134] The standby position of the planar gate 2 is determined according to the principle that its bottom edge is not affected by water flow.

[0135] Hydraulic cylinder working stroke L w The working stroke L of the hydraulic cylinder is determined by the sum of the height H of the orifice 2 of the planar gate, the height △h from the bottom edge to the bottom edge 6 of the lintel in the standby state, and the pressure stroke △L of the water filling valve 7. w =H + Δh + ΔL, Δh ≥ 0.2m;

[0136] The planar gate 2 and the hydraulic press 3 are connected by a tie rod 8. The tie rod assembly is equipped with lifting plates 9 on the upstream and downstream sides. The distance L from the lifting points at both ends of the tie rod 8 to the total length is determined according to the length of the center of the hydraulic cylinder lifting head 10 and the center of the lifting lug of the hydraulic press 3 when the planar gate 2 is in standby state.

[0137] When the plane gate 2 is closed, the height from the center of its lifting lug to its bottom edge is H. m When the plane gate 2 is in its free state, the height from the center of its lifting lug to its bottom edge is H. m `;

[0138] H m =H m `-△L-δ, where δ is the bottom water seal compression amount;

[0139] The distance from the center of the hydraulic cylinder lifting head 10 of the hydraulic press 3 to its outer edge is R. d When the elevation of the mounting platform 4 of the hydraulic cylinder frame 28 is ▽y, the distance from the center of the hydraulic cylinder lifting head 10 to the hydraulic cylinder standby position is L. y ;

[0140] The elevation of the bottom sill 12 of the planar gate 2 is ▽d, L=▽y-▽dL y -H-△hH m `;

[0141] The elevation of the top of the gate slot of the planar gate 2 is 13 m, which is determined according to its position above the top of the gate when it is in standby state;

[0142] The tie rod 8 is arranged with a short tie rod 14 reserved as the closed dimension and a set of long tie rods 15 with a center distance between the upper lifting point 16 and the lower lifting point 25 that is similar to the working stroke of the hydraulic press 3.

[0143] The distance between the two suspension points of the long tie rod 15 is L. c = (0.7~1)L w The distance L between the two suspension points of the short tie rod 14 d = (L / L) c -[L / L c[])L, where [] is the floor function;

[0144] The distance L from the center of the upper suspension point 16 of the long tie rod 15 and the short tie rod 14 to the locking position 17 ds Similarly, the distance from the center of the upper suspension point 16 of the long tie rod 15 and the short tie rod 14 to the upper outer edge is d1, and the distance from the center of the lower suspension point 25 of the long tie rod 15 and the short tie rod 14 to the lower outer edge is d2.

[0145] The center dimension L of the locking position 17 of the plane gate 2 to the tie rod lifting head 11 connected to its lifting lug is... ds ` The distance between the two end suspension points of the long tie rod 15mm and L should not be less than the length of the tie rod. c ;

[0146] When the planar gate 2 is in standby mode, it can lock the position of the top section tie rod 32 to determine the elevation of the first locking platform 19 ▽sd1;

[0147] The height h of the locking beam 20 of the planar gate 2 s , ▽sd1=▽yL y -L ds -h s ;

[0148] Hydraulic press 3 full retraction maximum stroke L smax =L+d1+R d +δ1, where δ1 is the gap between the outer edge of the lifting point 16 on the tie rod 8 and the oil cylinder lifting head 10 of the hydraulic press 3;

[0149] The high vertical shaft 1 can lock the third long tie rod 21 in a top-to-bottom sequence and completely disengage the top long tie rod 18 from the second long tie rod 22. The elevation of the second locking platform 23 is determined by ▽sd2, where ▽sd2 = ▽sd1 - 2L. c -d1-d2-δ1;

[0150] A dismantling and installation platform 4 for the lifting shaft 26 at an elevation of ▽c is set at a suitable position below the center of the upper lifting point 16 of the second long tie rod 22 in the high vertical shaft 1. The distance between ▽c and the center of the upper lifting point 16 of the second long tie rod 22 is h. c h c =-1~3m;

[0151] The maximum stroke of the hydraulic press 3 when fully extended is such that the cylinder lifting head 10 can be connected to the lifting head 11 of the second long tie rod 22 when the second locking platform 23 is locked. s ` max= L c +d1+d2+δ2, where δ2 is the gap between the outer edge of the lower suspension point 25 of the second long tie rod 22 and the outer edge of the upper suspension point 16 of the third long tie rod 21;

[0152] Hydraulic press 3 maximum stroke L max =MAX(L smax L s ` max );

[0153] When the hydraulic press 3 needs maintenance, after the top section tie rod 32 is fixed on the locking beam 20 of the first locking platform 19, the lifting shaft 26 connecting the hydraulic press 3 and the top section tie rod 32 is removed, and the hydraulic press 3 is lifted out of the top platform 27 of the high vertical shaft for maintenance by the lifting equipment 34. After the hydraulic press 3 is maintained, it is connected to the top section tie rod 18 after the assembly is completed on the mounting platform 4 of the cylinder frame 28.

[0154] When the planar gate 2 needs maintenance, the third section of the long tie rod 21 is locked on the second locking platform 23. Then, the top section of the long tie rod 18 and the second section of the long tie rod 22 are removed from the lifting shaft 26 on the disassembly and installation platform 4. The top section of the long tie rod 18 is moved to the storage location by the electric hoist 29 set at the bottom of the hydraulic cylinder frame 28. After the tie rods 8 are removed one by one, the planar gate 2 is hoisted as a whole onto the locking beam 20 of the second locking platform 23 by the hydraulic press 3 and fixed, or the middle and upper part is hoisted onto the locking beam 20 of the first locking platform 19 and fixed for maintenance. After the planar gate 2 is maintained, it is placed back on the second locking platform 23. The short tie rod 14 and the long tie rod 15 are connected to the planar gate 2 one by one by the electric hoist 29 and then lowered to the standby position of the planar gate 2.

[0155] The bottom of the hydraulic cylinder frame 28 is equipped with a track 30 for the electric hoist 29, which is perpendicular to the water flow direction.

[0156] refer to Figure 18 For water inrush conditions such as landslides, surges, and earthquakes, the installation platform 4 of the hydraulic cylinder frame 28 is set at position ▽y above the highest water inrush level on the top platform 27 of the high vertical shaft, and the first locking platform 19 is set above the normal water level. The rest is the same as the high vertical shaft 1.

[0157] For the medium and low vertical shaft 31, the following is a detailed explanation through a specific case:

[0158] refer to Figures 19-37 A planar gate 2 is installed in the low-to-medium vertical shaft 31, and the planar gate 2 is operated by a hydraulic press 3.

[0159] The mounting platform 4 of the cylinder frame 28 of the hydraulic press 3 is located above the check water level;

[0160] The standby position of the planar gate 2 is determined according to the principle that its bottom edge is not affected by water flow.

[0161] Hydraulic cylinder working stroke L wThe working stroke L of the hydraulic cylinder is determined by the sum of the height H of the orifice 2 of the planar gate, the height △h from the bottom edge to the bottom edge 6 of the lintel in the standby state, and the pressure stroke △L of the water filling valve 7. w =H + Δh + ΔL, Δh ≥ 0.2m;

[0162] The planar gate 2 and the hydraulic press 3 are connected by a tie rod 8. The tie rod assembly is equipped with lifting plates 9 on the upstream and downstream sides. The distance L from the lifting points at both ends of the tie rod 8 to the total length is determined according to the length of the center of the hydraulic cylinder lifting head 10 and the center of the lifting lug of the hydraulic press 3 when the planar gate 2 is in standby state.

[0163] When the plane gate 2 is closed, the height from the center of the tie rod lifting head 11 connected to the center of its lifting lug to the bottom edge is H. m When the plane gate 2 is in its free state, the height from the center of the tie rod lifting head 11 connected to the center of its lifting lug to the bottom edge is H. m `;

[0164] H m =H m `-△L-δ, where δ is the bottom water seal compression amount;

[0165] The distance from the center of the hydraulic cylinder lifting head 10 of the hydraulic press 3 to its outer edge is R. d When the elevation of the mounting platform 4 of the hydraulic cylinder frame 28 is ▽y, the distance from the center of the hydraulic cylinder lifting head 11 to the hydraulic cylinder standby position is L. y ;

[0166] The elevation of the bottom sill 12 of the planar gate 2 is ▽d, L=▽y-▽dL y -H-△hH m `;

[0167] The elevation of the top of the gate slot of planar gate 2 is 13 m, which is determined to be greater than 1.5 times the orifice height H of planar gate 2.

[0168] The elevation ▽sd2` of the second locking platform 23 is determined by the position of the lifting shaft 26 connecting the tie rod 8 and the plane gate 2 when the bottom of the plane gate 2 is fixed on the locking beam 20 at the top of the gate slot 13, which facilitates disassembly. ▽sd2` = ▽m` + H m +hs-h c `, hc` is the distance from the center of the lifting point of the plane gate 2 to the elevation ▽sd2` of the second locking platform 23, hc`=0~2m;

[0169] Hydraulic press 3 maximum stroke L` max =L+d1+R d +δ1;

[0170] When the hydraulic press 3 is in its fully retracted state, the distance from the elevation ▽y of the mounting platform 4 of the cylinder frame 28 to the center of the cylinder lifting head 10 is L. y `=L y-d1-R d -δ1;

[0171] When the planar gate 2 is locked to the second locking platform 23 and the hydraulic cylinder lifting head 10 of the hydraulic press 3 is in the fully retracted state, the maximum distance L between the center of the lifting lug of the planar gate 2 and the center of the hydraulic cylinder lifting head 10 of the hydraulic press 3 is... pymax =▽y-▽sd2`-L y -hc;

[0172] The maximum length of the tie rod 8 is determined by ensuring that its outer edges at both ends do not contact the outer edges of the hydraulic cylinder lifting head 10 of the hydraulic press 3 and the lifting lugs of the planar gate 2, respectively. The maximum distance L between the lifting points at both ends of the tie rod 8 is also determined. cmax =L pymax -d1-d2-R d -d1`-δ 1- δ2, d1` are the distances from the center of the gate's upper lifting point 16 to its outer edge;

[0173] The number of sections n of lever 8 is greater than or equal to [L / L]. cmax +1;

[0174] The distance between the two suspension points of the tie rod 8 and L` c =L / n;

[0175] The position of the top section tie rod 32 can be determined when the first locking platform 19 elevation ▽sd1` is in standby state according to the plane gate 2;

[0176] When the hydraulic press 3 needs maintenance, after the top section tie rod 32 is fixed to the locking beam 20 at the first locking platform 19 elevation ▽sd1`, the lifting shaft 26 connecting the hydraulic press 3 and the top section tie rod 32 is removed, and the hydraulic press 3 is lifted out of the shaft for maintenance by the lifting equipment 34. After the hydraulic press 3 is maintained, it is reconnected to the top section tie rod 32 after being assembled on the mounting platform 4 of the cylinder frame 28.

[0177] When the planar gate 2 is being overhauled, the second section tie rod 33 connected to the top section tie rod 32 is first locked to the second locking platform 23. Then, the top section tie rod 32 is detached from the second section tie rod 33. The top section tie rod 32 is then lifted to the locking beam 20 of the first locking platform 19 and fixed thereafter. The top section tie rod 32 is then moved to the storage location using temporary lifting equipment. The above steps are repeated until the second section tie rod 33, the third section tie rod 35, and the bottom section tie rod 36 are removed. The planar gate 2 is then placed in the maintenance chamber 37 between the second locking platform 23 and the first locking platform 19 for maintenance.

Claims

1. A method for overhauling a planar gate and a hydraulic press, comprising a planar gate (2) for a vertical shaft structure, a hydraulic press (3), a tie rod assembly, an installation platform (4), a gate bottom edge (5), a first locking platform (19), and a second locking platform (23), wherein the installation platform (4), the first locking platform (19), and the second locking platform (23) are sequentially arranged from top to bottom from the vertical shaft opening, the hydraulic press (3) is detachably installed on the installation platform (4), and the planar gate (2) is connected to the hydraulic press via the tie rod assembly. At the bottom of the machine (3), the mounting platform (4) is also provided with a pulley assembly for assisting transfer. The first locking platform (19) and the second locking platform (23) are provided with locking devices for the pull rod assembly or the planar gate (2). The pull rod assembly is provided with hanging plates (9) on the upstream and downstream sides. The pull rod assembly includes several sections of pull rod (8) and a hanging shaft (26). The hanging shaft (26) is provided at both ends of the pull rod (8). The locking device includes a base and a locking beam (20) provided on the base. The characteristic is that: Includes the following steps: S1: Determine the installation platform location, the standby position of the hydraulic press and the working stroke. Determine the installation platform (4) of the hydraulic press (3) based on the principle that the hydraulic cylinder frame (28) is above the water level. Determine the standby position and working stroke of the hydraulic press (3) based on the principle that the bottom edge (5) of the gate is not affected by the water flow. S2: For high vertical shaft (1) and medium-low vertical shaft (31), determine the elevation of the top (13) of the gate slot of the plane gate (2) and the total length of the tie rod (8); S3: For high vertical shafts (1) and medium-low vertical shafts (31), determine the platform at the top of the door slot, lock the platform elevation and set the lifting shaft (26) to disassemble and install the platform (24). S4: Determine the stroke of the hydraulic press (3) for high vertical shaft (1) and medium-low vertical shaft (31); S5: Lift the tie rod (8) and remove the hydraulic press for maintenance; S6: Lift the plane gate (2) to the locking platform or the platform at the top of the plane gate (2) slot and perform maintenance; In step S2, for the high vertical shaft (1): the elevation of the top (13) of the gate slot of the plane gate (2) is determined according to the position of the plane gate (2) when it is in standby state, which is higher than the top of the plane gate (2). The total length of the distance between the two ends of the tie rod (8) is determined according to the length of the center of the hydraulic cylinder head (10) of the hydraulic press (3) and the center of its lifting lug when the plane gate (2) is in standby state. The structural dimensions of the long tie rod (15) are determined according to the principle that the distance between the two ends of the tie rod (3) is not greater than the working stroke of the hydraulic press (3). A short tie rod (14) is set as a closed connection structure between the two ends of the tie rod (8). In step S2, for the medium and low vertical shaft (31), the elevation of the top (13) of the gate slot of the plane gate (2) is determined according to the height of the orifice of the plane gate (2) being greater than 1.5 times. The total length of the distance between the lifting points at both ends of the tie rod (8) is determined according to the length of the center of the hydraulic cylinder head (10) of the hydraulic press (3) and the center of its lifting lug when the plane gate (2) is in standby state. When the bottom of the plane gate (2) is fixed on the locking beam (20) at the top (13) of its gate slot, the position of the connecting shaft (26) of the tie rod (8) and the plane gate (2) is determined as the position of the second locking platform (23). In step S3, for the high vertical shaft (1): the elevation of the first locking platform (19) is determined by the position of the top section long tie rod (18) when the plane gate (2) is in standby state. The elevation of the second locking platform (23) is determined by the position of the third section long tie rod (21) that can be locked from top to bottom and the top section long tie rod (18) can be completely separated from the second section long tie rod (22). A platform (24) for disassembling and installing the lifting shaft (26) is set below the upper lifting point (16) of the second section long tie rod (22). In step S3, for the medium and low vertical shaft (31): when the plane gate (2) is locked to the second locking platform (23), when the hydraulic cylinder head (10) of the hydraulic press (3) is fully retracted, the outer edges of both ends of the tie rod (8) are not in contact with the outer edges of the hydraulic cylinder head (10) of the hydraulic press (3) and the lifting lug of the plane gate (2) to determine its maximum length. The distance from the lifting points at both ends of the tie rod (8) to the total length is divided into sections less than the maximum length of the tie rod (8) to determine the size from the center of the upper lifting point (16) of the tie rod (8) to the lower support surface of the locking plate. The elevation of the first locking platform (19) is determined according to the position where the hydraulic cylinder head (10) of the hydraulic press and the tie rod (8) can be completely separated when locking the top section tie rod (32). In step S4, for the high vertical shaft (1), the hydraulic press (3) stroke is determined by the maximum value between the full extension stroke of the hydraulic press (3) when the cylinder head (10) of the hydraulic press (3) can be connected to the tie rod head (11) of the second long tie rod (22) when the third long tie rod (21) is locked, and the full retraction stroke when the cylinder head (10) of the hydraulic press (3) is completely disengaged from the top long tie rod (18) when the top long tie rod (18) is locked in the first locking platform (19). In step S4, for medium and low vertical shafts (31), the maximum stroke is the full retraction stroke when the hydraulic cylinder head (10) of the hydraulic press (3) is completely disengaged from the first locking platform (19) when the top section tie rod (32) is in the locked state.

2. The method of claim 1, wherein: Both the long pull rod (15) and the short pull rod (14) are provided with an upper lifting point (16) and a locking position (17). The distance from the upper lifting point (16) of the long pull rod (15) to the locking position (17) of the long pull rod (15) is the same as the distance from the upper lifting point (16) of the short pull rod (14) to the locking position (17) of the short pull rod (14).

3. The method of claim 1, wherein: In step S5, for the high vertical shaft (1), long tie rods (15) with a reserved short tie rod (14) as the closed dimension are evenly arranged from the center distance of the upper lifting point (16) to the lower lifting point (25) and are similar to the working stroke of the hydraulic press (3) to reduce the total number of tie rods (8). The elevation of the first locking platform (19) is determined according to the principle that the hydraulic cylinder head (10) of the hydraulic press (3) can be completely detached from the tie rod (8) when the top tie rod (32) is locked. The elevation of the second locking platform (23) is determined according to the principle that the top long tie rod (18) can be completely detached from the second long tie rod (22) when the third long tie rod (21) is locked from top to bottom. The tie rods (8) are lifted by the hydraulic press (3) and the tie rods (8) are dismantled section by section for maintenance.

4. The method of claim 1, wherein: In step S5, for the medium and low vertical shaft (31), the elevation of the second locking platform (23) is determined by first meeting the maintenance height requirements of the plane gate (2) in the gate shaft cavity, and then the elevation of the first locking platform (19) is determined by the position where the hydraulic cylinder head (10) of the hydraulic press (3) can completely disengage from the tie rod (8) when locking the top section tie rod (32). The tie rod (8) is lifted by the hydraulic press (3) and the tie rod (8) is dismantled section by section for maintenance.

5. The method of claim 1, wherein: In step S6, when inspecting the plane gate (2) for the high vertical shaft (1), after locking the third section of the long tie rod (21) on the second locking platform (23), the top section of the long tie rod (18) and the second section of the long tie rod (22) are removed from the platform (24) where the lifting shaft (26) is disassembled and installed. The long tie rod (15) is dismantled section by section until the bottom section is removed by moving the top section of the long tie rod (18) to the storage location using the lifting equipment (34). The locking position (17) of the plane gate (2) is not less than the distance between the lifting points at both ends of the long tie rod (15) from its center to the center of its lifting head. Then, the plane gate (2) is lifted as a whole onto the locking beam (20) of the second locking platform (23) by the hydraulic press (3).

6. The method of claim 1, wherein: In step S6, when inspecting the plane gate (2) for the medium and low vertical shaft (31), first lock the second section tie rod (33) connected to the top section tie rod (32) to the second locking platform (23), then separate the top section tie rod (32) from the second section tie rod (33), use a hydraulic press (3) to lift the top section tie rod (32) to the first locking platform (19) and then separate it from the locking beam (20). Then use a lifting device (34) to move the top section tie rod (32) to the storage location. Repeat the above steps until all tie rods (8) are removed, and then place the plane gate (2) in the inspection chamber (37) between the second locking platform (23) and the first locking platform (19) for inspection and maintenance.

7. The method of claim 5, wherein: The lifting equipment (34) uses an electric hoist (29), and a track (30) matching the electric hoist (29) is set at the bottom of the cylinder frame (28).

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