Installation method of large ship lift

Abstract

The invention discloses an installation method of a large ship lift. Comprising the following steps that S1, ship lift platform transfer is conducted; s2, a ship lift platform is lifted by a floating crane of the floating crane ship; s3, hoisting of the single ship lift platform is completed through a floating crane of the floating crane ship; s4, the step S1 to the step S3 are repeated, and hoisting of the next ship lift platform is completed; s5, butt joint bolts of the ship lift platform are installed; s6, the step S4 and the step S5 are repeated until all the ship lift platforms are locked at the maintenance positions of the locking beam assemblies and are connected into a whole; s7, installing a hoisting winch and winding a steel wire rope; and S8, all the lifting winches synchronously adjust the height of the ship lift platform. The trestle is transferred to a wharf through land transfer and then is transferred on the sea through a transport barge, and the situation that overlarge load is caused to the trestle ground, and the concrete structural strength of the wharf is affected can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of marine engineering and ship engineering equipment, and in particular to an installation method of a large ship lift. Background Art

[0002] The production and maintenance of ships in traditional shipyards are often carried out in docks. However, due to the long time span of shipbuilding and maintenance, the fixed size of the dock and the low turnover rate of the dock pool slipway, the shipyard often faces an embarrassing situation where there are orders but no slipway and production cannot be carried out. As an important device for shipbuilding in modern shipyards, the ship lift plays an important role in improving the turnover rate of slipways and reducing costs. Its working principle is: when a ship needs to be repaired, the ship lift platform is immersed in water, and it drives above the ship lift platform. The ship lift lifts the ship to be repaired out of the water, and then transfers it to a dry berth by a transfer system for repair operations. When the ship is repaired or manufactured, the repaired ship is put back on the water by lowering the ship lift.

[0003] Ship lifts can generally be divided into inland river dam lifts and shipyard ship lifts. Shipyard ship lifts greatly exceed conventional inland river dam lifts in terms of size, tonnage and lifting capacity. In the prior art, the weight of a ship lift platform is generally in the thousands of tons level. The heavier ones, such as the Three Gorges Ship Lift, have a total weight of about 15,500 tons and a maximum lifting weight of 15,500 tons. It has extremely high lifting capacity and deadweight, and its lifting volume is already at the forefront of the world. In the installation process of similar shipyard 10,000-ton-level super-large ship lift platforms, the ship lift is generally disassembled into multiple ship lift platforms for single-piece transportation and hoisting, and then combined to avoid the risk of the overall deadweight of the ship lift during the hoisting process, and to avoid the situation where the bearing capacity of the civil engineering trestle is insufficient and cannot withstand the load of a large-tonnage crane. The locking beam is the main locking structure of the ship lift platform, and its positioning accuracy directly affects the position of the deck after the platform is installed. The locking beam has a large deadweight and there is a constraint relationship between it and the platform's movable pulley. How to formulate its installation sequence will directly affect the construction period and installation efficiency. The hoist winch is the main lifting device of the ship lift platform. Its installation position and the accuracy of the wire rope winding directly affect the operation of the platform.

[0004] Therefore, it can be seen that there are a lot of difficulties in the overall installation process of the above-mentioned large-scale ship lift platform. Therefore, a large-scale ship lift installation method is proposed to solve the technical problems existing in the installation process of the large-scale ship lift platform. Summary of the invention

[0005] The purpose of the present invention is to provide an installation method for a large ship lift to solve the problems of difficulty in installation and transportation, difficulty in controlling installation accuracy and insufficient platform stability during the actual installation of the large ship lift platform.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: A method for installing a large ship lift, the large ship lift comprising a plurality of ship lift platforms connected to each other by butt joint bolts and butt joint flanges, and also comprising a locking beam assembly for lifting or lowering the ship lift platform, the locking beam assembly being used to allow the ship lift platform to switch between an inspection position and a working position, and to lift or lower the ship lift platform; comprising the following steps: Step S1, the ship lift platform is transferred from the external site to the dock for transport barge transfer; Step S2, after the transport barge moves to the outside of the ship lift port, the ship lift platform is lifted by the floating crane of the floating crane, and the floating crane is moved until the main beam cantilever of the ship lift platform is aligned with the dock opening close to the steel pipe high-pile dock; Step S3, using the floating crane of the floating crane ship to complete the lifting of the single-chip ship lift platform; Step S4, repeating steps S1 to S3 to complete the hoisting of the next ship lift platform; Step S5, installing the seam bolts on the ship lift platform; Step S6, repeating steps S4 and S5 until all the ship lift platforms are locked in the inspection position of the locking beam assembly and are connected to each other as a whole; Step S7, installing the hoisting winch of the single ship lift platform and winding the wire rope, and synchronously debugging the hoisting winches of all ship lift platforms through the control system; Step S8, all lifting winches synchronously adjust the height of the ship lift platform so that all ship lift platforms are transferred to the working position of the locking beam assembly, and then the locking beam assembly and all ship lift platforms are lowered as a whole until the upper surface of the ship lift platform is flush with the dock surface, completing the installation of the ship lift.

[0007] In particular, in step S1, the ship lift platform is fixed and tied at an external site and then transported to the transfer terminal by a SPMT transport vehicle on a land platform, and the ship lift platform is transferred to a transport barge by a floating crane, and then transferred at sea by the transport barge; an SPMT bracket is provided on the SPMT transport vehicle, and a support leg higher than the ground is provided at the bottom of the SPMT bracket.

[0008] In particular, in step S1, before the transfer, half a walking channel is provided in the joint between two adjacent ship lift platforms, and after the next ship lift platform is hoisted in step S4, the half walking channel in the joint between the two adjacent ship lift platforms is fastened into a complete walking channel by bolt connection.

[0009] Furthermore, in step S5, the installation process of the butt joint bolts of the ship lift platform is specifically as follows: starting from the butt joint flange in the middle of the ship lift platform, the bolt installation process is performed toward both sides along the width direction of the ship lift platform.

[0010] In particular, in step S2, four anchor points are preset at the stern of the floating crane vessel, one ends of four steel wire ropes are respectively fixed to the seabed by anchors, and the other ends of the four steel wire ropes are provided with buoys and rings, and four winches are evenly arranged at the stern of the floating crane vessel, and are connected to the rings through the steel wire ropes of the winches; four winches are also arranged at the bow of the floating crane vessel, and the steel wire ropes of the four winches are respectively connected to the mooring piles at different positions of the dock; the method for moving the floating crane vessel is: the length of the steel wire rope of the winch is independently controlled by the eight winches at the bow and stern of the floating crane vessel to realize the position control of the floating crane vessel.

[0011] In particular, in step S3, the method for hoisting the single-piece ship lift platform is as follows: using the floating crane of the floating crane ship to slowly lower the ship lift platform until the main beam cantilever all falls into the dock hole, and then installing the locking beam assembly, after the position of the locking beam assembly is adjusted to the design value, and then adjusting the elevation of the movable pulley pin shaft of the ship lift platform, so that the movable pulley pin shaft is inserted into the pin hole of the maintenance position on the locking plate of the locking beam assembly, and releasing the hook of the floating crane ship to complete the hoisting of the single-piece ship lift platform; in step S8, by lifting the winch 7, the movable pulley pin shaft of the ship lift platform is transferred from the pin hole of the maintenance position on the locking plate to the pin hole of the working position on the locking plate, completing the conversion from the maintenance position to the working position.

[0012] Furthermore, in step S3, the locking plates of the locking beam assembly are two plates arranged side by side that pass through the locking beam from bottom to top, and there is a swing gap between the two locking plates and the locking beam, so that the locking plates are opened into an eight-shape, and when the two ends of the movable pulley pin shaft of the ship lift platform are respectively embedded in the pin holes of the maintenance position on the locking plate, the locking plates are reset to a vertical state and retracted toward the middle, and then the hook of the floating crane is released to complete the installation of the single-piece ship lift platform.

[0013] Furthermore, in step S3, the installation of the locking beam assembly is specifically as follows: when pouring concrete in the area where the locking beam assembly is located before performing step S1, space is reserved for the installation of the locking beam embedded parts, and the secondary pouring is performed after the locking beam embedded parts are installed and adjusted into place; after all the main beam cantilevers in step S3 fall into the dock opening, the position of the locking beam is adjusted and positioned by the locking beam embedded parts to install the locking beam.

[0014] In particular, in step S7, the wire rope winding method is specifically as follows: a damping winch is fixedly set on the ship lift platform, a working wire rope reel is wound on the damping winch, and after the wire rope is pulled out from the winding drum of the damping winch, it is successively passed around the movable pulley of the ship lift platform and the fixed pulley of the locking beam in the locking assembly, and then passed around the movable pulley of the ship lift platform again and then wound around the winding drum of the lifting winch for three turns, and fixed with a rope pressure plate, driving the winding drum of the lifting winch to rotate for winding until the wire rope on the damping winch is completely released, and finally the wire rope head on the damping winch is fixedly connected to a fixed point on the locking beam in the locking beam assembly.

[0015] In particular, in step S7, the control system is specifically as follows: the controller of each lifting winch is uniformly and synchronously controlled by the PLC controller, and the height of the overall platform composed of all the ship lift platforms is first raised by the lifting winch, and then the opening and closing degree of the locking plate of the locking beam in all the locking beam assemblies is adjusted to an eight-shaped shape, and then the overall platform is slowly lowered until the movable pulley pin shaft of each ship lift platform is aligned with the pin hole of a working position of a locking plate, and the locking plate position is reset again to complete the process of transferring the overall platform from the maintenance position to the working position.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1) The present invention transfers the cargo to the wharf by land and then transfers it to the sea by transport barge, which can effectively avoid excessive load on the pier ground and affect the strength of the wharf concrete structure.

[0017] 2) The present invention uses a floating crane to hoist the single-chip ship lift platform, and uses the dock opening reserved at the dock to position the single-chip ship lift platform, thereby avoiding the influence of waves on the accuracy of the ship lift platform during installation, effectively improving the installation accuracy, and avoiding the problem of misalignment of the ship lift platform installation.

[0018] 3) The present invention first locks the ship lift platform in the inspection pin hole and then installs the butt joint bolts, so that sufficient construction space is reserved for the bottom of the ship lift platform during the installation of the butt joint bolts, effectively reducing the impact of seawater tides on the construction and extending the window period for the butt joint bolt connection construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the ship lift platform transfer.

[0020] Figure 2 Schematic diagram of the floating crane moving process.

[0021] Figure 3 This is a schematic diagram of the main structure of the locking component.

[0022] Figure 4 It is a schematic diagram of the side structure of the locking component.

[0023] Figure 5 Schematic diagram of wire rope winding for hoisting winch.

[0024] Figure 6 Schematic diagram of the joint structure of the ship lift platform.

[0025] The meanings of the symbols in the figure are: Ship lift platform – 1; Walking channel – 101; Locking beam—2; maintenance position—201; working position—202; locking plate—203; locking beam fixed pulley—204; Transport barge—3; SPMT transport vehicle—301; SPMT support—302; Floating crane vessel—4; anchor point—401; bollard—402; Dock openings—5; Movable pulley—6; Movable pulley pin—601; Damping winch—701; lifting winch—702. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical scheme and the technical effects brought about.

[0027] like Figure 1 to Figure 6 As shown, a method for installing a large ship lift, the large ship lift comprises a plurality of ship lift platforms 1 connected to each other by butt joint bolts and butt flanges, and also comprises a locking beam assembly for lifting or lowering the ship lift platform 1, the locking beam assembly is used to allow the ship lift platform 1 to switch between the maintenance position 201 and the working position 202, and to lift or lower the ship lift platform 1; the method comprises the following steps: Step S1, the ship lift platform 1 is transferred from an external site to a dock for transfer to a transport barge 3; Step S2, after the transport barge 3 moves to the outside of the dry ship lift port, the ship lift platform 1 is lifted by the floating crane 4, and the floating crane 4 is moved until the main beam cantilever of the ship lift platform 1 is aligned with the dock opening 5 close to the dock; Step S3, using the floating crane of the floating crane vessel 4 to complete the lifting of the single-chip ship lift platform 1; Step S4, repeating steps S1 to S3 to complete the hoisting of the next ship lift platform 1; Step S5, installing the seam bolts on the ship lift platform 1; Step S6, repeating steps S4 and S5 until all the ship lift platforms 1 are locked in the maintenance position 201 of the locking beam assembly and are connected to each other as a whole; Step S7, installing the hoisting winch 702 of the single ship lift platform 1 and winding the wire rope, and synchronously debugging the hoisting winches 702 of all ship lift platforms 1 through the control system; Step S8, all lifting winches 702 synchronously adjust the height of the ship lift platform 1, so that all the ship lift platforms 1 are transferred to the working position 202 of the locking beam assembly, and then the locking beam assembly and all the ship lift platforms 1 are lowered as a whole until the upper surface of the ship lift platform 1 is flush with the dock surface, completing the installation of the ship lift.

[0028] In the present invention, the main principles are as follows: like Figure 1 As shown, in the prior art, the installation of the ship lift platform 1 is usually carried out by lifting a single ship lift platform 1 with multiple cranes and quickly transporting the ship lift platform 1. However, for a large ship lift platform 1, the weight of the single ship lift platform 1 is also very large, which is very easy to cause the dock to be overloaded and cause damage to the high-pile dock, thereby destroying the overall concrete structural strength of the dock wall. In addition, due to the construction of pipelines and underground excavation in the land area, large equipment cannot be passed. Therefore, in the present invention, the single ship lift platform 1 is first transported by sea transportation to avoid the weak strength position of the dock and avoid damage to the dock wall as a whole. In addition, the ship lift platform 1 in the prior art is generally directly installed and locked in the working position 202, so as to keep the platform deck flush with the dock. The present invention adopts the method of installing the ship lift platform 1 in the maintenance position 201 during installation, so that the deck of the ship lift platform 1 is higher than the dock elevation, exposing the lower structure of the ship lift platform 1, facilitating the subsequent installation and maintenance of the connecting bolts, and at the same time, it is beneficial to improve the quality of the wire rope winding of the subsequent lifting winch.

[0029] The ship lift platform involved in the present invention is connected in sections, and the influence of thermal deformation of the platform is taken into consideration. After manufacturing on site, a complete assembly test is carried out to check the size, pre-arch and other parameters of the platform, so as to better ensure the smooth installation of the platform on site. The present invention adopts floating crane hoisting, and takes into account the floating value of the hook of the floating crane. The up and down shaking value of the hook of the floating crane in the surrounding closed water area under no-load state is measured in advance, and compared with the height of the locking hole of the locking plate. Ensure that the up and down shaking value of the hook is less than the height of the locking hole to avoid up and down shaking collision and damage to the locking plate during the floating crane hoisting.

[0030] Specifically, since the ship lift platform 1 is usually located at the seaside with a large temperature difference between day and night, the temperature will have a great influence on the length deformation of the ship lift platform 1. Therefore, when manufacturing the ship lift platform 1, it is necessary to shorten it by an equal amount according to the position and proportion. The relevant points can be marked on the butt joint flange plates on both sides of each ship lift platform 1 in advance on site, and the three-dimensional coordinates of each point can be measured using a total station. Then, a spatial morphological analysis is performed to confirm the relevant dimensions. After the dimensions are confirmed to meet the requirements, subsequent processes can be carried out.

[0031] As a preferred embodiment, in step S1, the ship lift platform is fixed and tied at an external site and then transported to the transfer terminal by a SPMT transport vehicle 301 on a land platform, and the ship lift platform 1 is transferred to a transport barge 3 by a floating crane, and then transferred at sea by the transport barge 3; an SPMT bracket 302 is provided on the SPMT transport vehicle 301, and a support leg higher than the ground is provided at the bottom of the SPMT bracket 302.

[0032] In this embodiment, the SPMT transporter 301 (Self-Propelled Modular Transporter) is called a self-propelled modular transporter in Chinese. Its advantages are mainly flexible use, convenient loading and unloading, and a load capacity of more than 50,000 tons when multiple vehicles are mechanically assembled or freely combined. It is widely used in engineering fields such as equipment manufacturing, petroleum, chemical industry, offshore oil, and bridge construction. The SPMT module has specifications of 2, 3, 4, and 6 axes. The single module of the SPMT transporter in the present invention has a length of 5600mm, a width of 2430mm, and a wheelbase of 2070mm. The adjustable range in the elevation direction is 1200mm-1800mm, the single wheel can rotate at an angle of +130°~-100°, and a double-row 26-axis layout is adopted. The SPMT bracket 302 is a steel component, which is mainly used in the land transportation stage. It is arranged between the SPMT transporter 301 and the ship lift platform 1 to balance the load and prevent the ship lift platform 1 from slipping due to uneven ground or damage to the SPMT transporter 301, which may cause the platform to overturn. There are outriggers on both sides, and the bottom of the outriggers is about 200mm above the ground to provide auxiliary support in case of emergencies.

[0033] As a preferred embodiment, Figure 6 As shown, in step S1, before the transfer, half of the walking channel 101 is respectively provided in the joint between two adjacent ship lift platforms 1, and after the next ship lift platform 1 is hoisted in step S4, the half walking channel 101 in the joint between the two adjacent ship lift platforms 1 is fastened into a complete walking channel 101 by bolt connection.

[0034] In this embodiment, another walking channel 101 structure is provided to facilitate the installation of joint bolts at a later stage. Specifically, during the hoisting stage of the ship lift platform 1, since there is seawater under the platform, the length of the joint position, that is, the width of the ship lift platform 1, is usually relatively long. How to enable the installers to enter the platform safely and smoothly and safely connect and fix the relevant bolts is a key point to be considered. In the storage area of ​​the ship lift platform 1, half of the walking channel 101 is first welded on both sides of the joint position of each platform. One is fixed on each platform. In this way, when the platform is hoisted and closed, it is transformed into a complete channel, and its main function is to provide a convenient channel for operators who install the platform connection bolts. Because the conditions for installation and fixation are not met after the platform is installed, it needs to be pre-assembled and welded in the storage area.

[0035] As a preferred embodiment, in step S5, the installation process of the butt joint bolts of the ship lift platform 1 is specifically as follows: first starting from the butt flange in the middle of the ship lift platform 1, the bolt installation process is performed toward both sides along the width direction of the ship lift platform 1.

[0036] In this embodiment, an installation logic for installing the butt joint bolts is provided. Specifically, since half of the walking channel 101 is independently welded on both sides of the butt joint of the two adjacent ship lift platforms 1, when the two ship lift platforms 1 are in place, personnel can enter the bottom of the platform butt joint through the walking channel 101. It is worth noting that there is no relative connection between the two half-pull platforms at this time, so when the channel is initially formed, the two half-pull walking channels 101 need to be connected and fixed together with bolts to increase stability and ensure the safety of the operator. In order to ensure the convenience of inserting the bolts, bolts can be driven from the butt flange plate in the middle of the platform to both sides of the platform. Each flange plate is first driven into some bolts at the four corners for positioning. After all flanges have basically completed the alignment of the bolt holes, the installation of all bolts can be implemented. During the process, tools such as taper pins and hydraulic jacks can be used to assist in the installation of bolts. Bolting from the middle to both sides can also reduce installation errors and avoid the accumulation of multiple installation errors when bolting from one side, resulting in the inability to install subsequent bolts.

[0037] As a preferred embodiment, in step S2, four anchor points 401 are preset at the stern of the floating crane 4, one ends of four steel wire ropes are fixed to the seabed by anchors respectively, and the other ends of the four steel wire ropes are provided with buoys and rings, and four winches 402 are evenly arranged at the stern of the floating crane 4, and are connected to the rings through the steel wire ropes of the winches 402; four winches 402 are also arranged at the bow of the floating crane 4, and the steel wire ropes of the four winches 402 are respectively connected to the mooring piles 402 at different positions of the dock; the method for moving the floating crane 4 is: the length of the steel wire rope of the winch 402 is independently controlled by the eight winches 402 at the bow and stern of the floating crane 4, so as to realize the position control of the floating crane 4.

[0038] In this embodiment, if Figure 2 As shown, a method for accurately adjusting the position of the floating crane 4 is provided. Specifically, a total of eight winches for positioning are arranged, four are located at the stern of the floating crane 4, and four are located at the bow of the floating crane 4. The four winches at the stern are respectively connected to four rings through steel wire ropes, and the four rings are respectively connected to anchor points anchored in the seabed through connecting ropes, so as to realize the adjustment of the stern of the floating crane 4; similarly, the four winches at the bow of the floating crane 4 are respectively connected to four mooring piles on the dock. When the position of the floating crane 4 needs to be adjusted, the steel wire ropes are retracted and released by controlling different winches, and the winches are adjusted to connect to different mooring piles to realize the precise adjustment of the position of the floating crane 4.

[0039] As a preferred embodiment, in step S3, the method for hoisting the single-chip ship lift platform is: using the floating crane of the floating crane ship 4 to slowly lower the ship lift platform 1 until the main beam cantilever all falls into the dock opening 5, and then installing the locking beam assembly. After the position of the locking beam assembly is adjusted to the design value, the elevation of the movable pulley pin shaft 601 of the ship lift platform 1 is adjusted, so that the movable pulley pin shaft 601 is inserted into the pin hole of the maintenance position 201 on the locking plate 203 of the locking beam assembly, and the hook of the floating crane ship 4 is released to complete the hoisting of the single-chip ship lift platform 1; in step S8, the movable pulley pin shaft 601 of the ship lift platform 1 is transferred from the pin hole of the maintenance position 201 on the locking plate 203 to the pin hole of the working position 202 on the locking plate 203 by lifting the winch 702, completing the conversion from the maintenance position 201 to the working position 202.

[0040] This embodiment provides a method for stably completing the hoisting of a single-chip ship lift platform 1, such as Figure 2 , Figure 3 and Figure 4As shown, specifically, the working position and the inspection position of the ship lift platform 1 are determined by the relative position of the pin hole on the locking plate 203 and the pin shaft 601 of the platform movable pulley. At the same time, the locking plate 203 is located on both sides of the platform movable pulley 6, and a locking beam 2 is installed above the dock opening, which conflicts with the installation position of the ship lift platform 1 when it falls. And the locking plate is small at the top and large at the bottom, and can only be installed from bottom to top. Because the space at the dock opening of the ship lift is small, it is not enough to install the travel limit device, the locking cylinder assembly and other parts. Therefore, it is necessary to assemble the relevant parts of the locking beam assembly on the locking beam assembly bracket in advance with the assistance of a crane. Then, when the floating crane 4 is hoisted into place with the ship lift platform 1 and falls into the dock opening, the locking beam assembly is hoisted from top to bottom by the crane as a whole, and the movable pulley pin shaft 601 of the ship lift platform 1 is inserted into the hole of the locking plate 203 to realize the platform in place. After the platform load is transmitted to the dock structure through the locking beam assembly, the hook of the floating crane 4 can be removed. In this process, the locking beam sits on the concrete pier structure to facilitate load transfer, and the overall position of the locking beam assembly is adjusted to the design requirements; the eyelet here refers to the pin hole of the maintenance position 201 on the locking plate 203. Similarly, in step S8, in order to realize the transfer of the ship lift platform 1 from the maintenance position 201 on the locking plate 203 to the working position 202, it is necessary to realize the overall lifting and lowering by lifting the winch 702 after the overall installation and connection into a platform.

[0041] As a further embodiment, in step S3, the locking plate 203 of the locking beam assembly is two plates arranged side by side that pass through the locking beam 2 from bottom to top, and there is a swing gap between the two locking plates 203 and the locking beam 2, so that the locking plate 203 is opened into an eight-shape. When the two ends of the movable pulley pin shaft 601 of the ship lift platform 1 are respectively embedded in the pin holes of the maintenance position 201 on the locking plate 203, the locking plate 203 is reset to a vertical state and retracted toward the middle, and then the hook of the floating crane 4 is released to complete the installation of the single-chip ship lift platform 1.

[0042] In this embodiment, a specific method for installing the locking plate 203 of the locking assembly is provided, such as Figure 3 and Figure 4As shown, the installation of the locking beam assembly requires that the relevant parts of the locking beam 2 be assembled on the tooling platform in advance, and then hoisted as a whole by a crane. This is because the locking plate 203 is located on both sides of the movable pulley 6, and the locking beam 2 is located just above the movable pulley 6. If the locking beam 203 is installed first, the ship lift platform 1 cannot fall in well because of the cantilever structure on both sides. At the same time, since the size of the locking plate 203 is small at the top and large at the bottom, it can only be dragged upward from the bottom of the locking beam body, and it cannot be installed by dropping from the top to the bottom. Since there is a swing gap between the two locking plates 203 and the locking beam 2, the locking plate 203 is opened into an eight-shaped shape. When the two ends of the movable pulley pin 601 of the ship lift platform 1 are respectively embedded in the pin holes of the maintenance position 201 on the locking plate 203, the locking plate 203 is reset to a vertical state and folded toward the middle, and then the hook of the floating crane 4 is released to complete the installation of the single-piece ship lift platform 1.

[0043] As a further embodiment, in step S3, the installation of the locking beam assembly is specifically as follows: when pouring concrete in the area where the locking beam assembly is located before performing step S1, space is reserved for the installation of the embedded parts of the locking beam 2, and the secondary pouring is performed after the embedded parts of the locking beam 2 are installed and adjusted into place; after the main beam cantilever in step S3 has all fallen into the dock opening 5, the position of the locking beam 2 is adjusted and positioned by the embedded parts of the locking beam 2, and the locking beam 2 is installed.

[0044] In this embodiment, a construction method for improving the accuracy of embedded parts is provided. Specifically, all embedded locking beam parts and winch embedded parts on the dock should be accurately installed and cast. The ship lift platform 1 has a high positioning accuracy, and its accuracy is achieved by controlling the position of the embedded locking beam parts. The embedded locking beam parts adopt a two-phase casting mode, that is, when pouring concrete in this area, a vacant space is reserved, and after the embedded locking beam parts are installed and adjusted in place, a second casting is performed. This can prevent the influence of large-volume concrete vibration on the accuracy of embedded parts.

[0045] As a preferred embodiment, in step S7, Figure 5 As shown, the wire rope winding method is specifically as follows: a damping winch 701 is fixedly arranged on the ship lift platform 1, and a working wire rope reel is wound on the damping winch 701. After the wire rope is pulled out from the winding drum of the damping winch 701, it is successively passed around the movable pulley 6 of the ship lift platform 1 and the locking beam fixed pulley 204 on the locking beam 2 in the locking beam assembly, and then it is again passed around the movable pulley 6 of the ship lift platform 1 and then wound around the winding drum of the lifting winch 702 for three turns, and fixed with a rope pressing plate, driving the winding drum of the lifting winch 702 to rotate for winding until the wire rope on the damping winch 701 is completely released, and finally the wire rope head on the damping winch 701 is fixedly connected to a fixed point on the locking beam 2.

[0046] In this embodiment, a winding method between an available lifting winch 702 and a locking beam 2 is provided. Specifically, in order to ensure that all steel wire ropes wound into the drum are arranged tightly without twisting, misalignment, looseness, etc., it is necessary to apply an additional external force to the steel wire rope to ensure that it is evenly stressed and tight. The present invention uses a damping winch 701 with adjustable torque that is specially used for winding steel wire ropes. The damping winch 701 is fixed on the deck of the ship lift platform 1. Because the steel wire rope arrives in rolls, it is necessary to first put the rolled steel wire rope on the pin of the damping winch 701 and fix it. First, a stainless steel wire rope is used as a guide rope, and its tail is connected to the formal product steel wire rope by welding or splicing. The other end of the guide rope is passed around the movable pulley 6 of the ship lift platform 1, the locking beam fixed pulley 204, and then the movable pulley 6 of the ship lift platform 1 again according to the designed pulley ratio and winding method, and finally wrapped around the winding drum of the lifting winch 702 for three turns and fixed with a rope pressing plate.

[0047] After checking that the guide rope sequence is correct, start the damping winch, jog the hoisting winch 701, and when the working wire rope passes through the movable pulley of the ship lift platform 1 and the locking beam fixed pulley 204, and is wound on the winding drum, use a pressure plate to fix the rope head of the working wire rope, cut off the guide wire rope, and process the joint.

[0048] Continue the jog operation, and after winding 3 times, it can run continuously at low speed. During the process, you need to pay attention to the arrangement of the wire ropes at all times. If there is a misalignment or disorder, you need to stop the operation and wait for processing before continuing until all the wire ropes are wound. Fix the other end of the working wire rope on the locking beam body.

[0049] As a preferred embodiment, in step S7, the control system is specifically as follows: the controller of each lifting winch 702 is uniformly and synchronously controlled by the PLC controller, and the height of the overall platform composed of all the ship lift platforms 1 is first raised by the lifting winch 702, and then the opening and closing degree of the locking plate 203 of the locking beam 2 in all the locking beam assemblies is adjusted to an eight-shaped shape, and then the overall platform is slowly lowered until the movable pulley pin shaft 601 of each ship lift platform 1 is aligned with the pin hole of a working position 202 of a locking plate 203, and the position of the locking plate 203 is reset again to complete the process of transferring the overall platform from the maintenance position 201 to the working position 202.

[0050] In this embodiment, a control system for synchronously controlling the lifting of all ship lift platforms 1 is provided. Specifically, since the lifting winch 702 in the present invention corresponds to the ship lift platform 1 in a ratio of two to one, in order to ensure that all ship lift platforms 1 can be lifted synchronously, it is necessary to uniformly control the control machine of each lifting winch 702. At the same time, in order to adjust the ship lift platform from the maintenance position 201 to the working position 202, it is necessary to first lift the ship lift platform from the pin hole of the maintenance position 201, remove the force of the locking plate 203, and then adjust the angles of the two locking plates 203 so that the locking plates 203 of the locking beam 2 open and close to the figure eight, and then slowly lower the entire platform until the movable pulley pin 601 of each ship lift platform 1 is aligned with the pin hole of the working position 202 of a locking plate 203, and reset the position of the locking plate 203 again, and complete the process of transferring the entire platform from the maintenance position 201 to the working position 202.

[0051] The terms “connection” and “fixation” mentioned in the description of the present invention may refer to fixed connection, processing and forming, welding or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0052] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inside", "outside", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for installing a large ship lift, the large ship lift comprising a plurality of ship lift platforms (1) connected to each other by butt bolts and butt flanges, and also comprising a locking beam assembly for lifting or lowering the ship lift platform (1), the locking beam assembly being used to allow the ship lift platform (1) to switch between a maintenance position (201) and a working position (202), and to lift or lower the ship lift platform (1); characterized in that: The steps include: Step S1, the ship lift platform (1) is transferred from an external site to a dock for transfer to a transport barge (3); Step S2, after the transport barge (3) moves to the outside of the ship lift port, the ship lift platform (1) is lifted by the floating crane of the floating crane (4), and the floating crane (4) is moved to a position where the cantilever of the main beam of the ship lift platform (1) is aligned with the dock opening (5) close to the steel pipe high-pile dock; Step S3, using the floating crane of the floating crane vessel (4) to complete the lifting of the single-piece ship lift platform (1); Step S4, repeating steps S1 to S3 to complete the hoisting of the next ship lift platform (1); Step S5, installing the seam bolts of the ship lift platform (1); Step S6, repeating steps S4 and S5 until all the ship lift platforms (1) are locked in the maintenance position (201) of the locking beam assembly and are connected to each other as a whole; Step S7, installing the hoisting winch (702) of the single ship lift platform (1) and winding the wire rope, and synchronously debugging the hoisting winches (702) of all ship lift platforms (1) through the control system; Step S8, all lifting winches (702) are synchronously adjusted to the height of the ship lift platform (1), so that all the ship lift platforms (1) are transferred to the working position (202) of the locking beam assembly, and then the locking beam assembly and all the ship lift platforms (1) are lowered as a whole until the upper surface of the ship lift platform (1) is flush with the dock surface, thereby completing the installation of the ship lift.

2. The installation method of a large ship lift according to claim 1, characterized in that: In step S1, the ship lift platform is fixed and tied at an external site and then transported to a transfer dock on a land platform by an SPMT transport vehicle (301). The ship lift platform (1) is transferred to a transport barge (3) by a floating crane, and then transferred at sea by the transport barge (3). The SPMT transport vehicle (301) is provided with an SPMT bracket (302), and the bottom of the SPMT bracket (302) is provided with a support leg higher than the ground.

3. The installation method of a large ship lift according to claim 1, characterized in that: In step S1, before the transfer, half of the walking channel (101) is respectively provided in the joint between two adjacent ship lift platforms (1), and after the next ship lift platform (1) is hoisted in step S4, the half of the walking channel (101) in the joint between the two adjacent ship lift platforms (1) are fastened by bolts to form a complete walking channel (101).

4. A method for installing a large ship lift as claimed in claim 3, characterized in that: In step S5, the installation process of the butt joint bolts of the ship lift platform (1) is specifically as follows: first starting from the butt joint flange in the middle of the ship lift platform (1), the bolt installation process is performed toward both sides along the width direction of the ship lift platform (1).

5. The installation method of a large ship lift according to claim 1, characterized in that: In step S2, four anchor points (401) are preset at the stern of the floating crane (4), one end of four steel wire ropes are fixed to the seabed by anchors respectively, and the other ends of the four steel wire ropes are provided with buoys and rings. Four winches are evenly arranged at the stern of the floating crane (4), and are connected to the rings through the steel wire ropes of the winches; four winches are also arranged at the bow of the floating crane (4), and the steel wire ropes of the four winches are respectively connected to mooring piles (402) at different positions of the dock; the method for moving the floating crane (4) is: the length of the steel wire ropes of the winches is independently controlled by the eight winches at the bow and stern of the floating crane (4), so as to realize the position control of the floating crane (4).

6. The installation method of a large ship lift according to claim 1, characterized in that: In step S3, the method for hoisting the single-piece ship lift platform (1) is as follows: the ship lift platform (1) is slowly lowered by the floating crane of the floating crane ship (4) until the main beam cantilever is completely dropped into the dock opening (5), and then the locking beam assembly is installed. After the position of the locking beam assembly is adjusted to the design value, the elevation of the movable pulley pin shaft (601) of the ship lift platform (1) is adjusted so that the movable pulley pin shaft (601) is inserted into the locking plate (203) of the locking beam assembly. The pin hole of the inspection position (201) is inserted into the locking plate (203), and the hook of the floating crane (4) is released to complete the lifting of the single-piece ship lift platform (1); in step S8, the movable pulley pin shaft (601) of the ship lift platform (1) is transferred from the pin hole of the inspection position (201) on the locking plate (203) to the pin hole of the working position (202) on the locking plate (203), thereby completing the conversion from the inspection position (201) to the working position (202).

7. A method for installing a large ship lift as claimed in claim 6, characterized in that: In step S3, the locking plates (203) of the locking beam assembly are two plates arranged side by side and passing through the locking beam (2) from bottom to top. There is a swing gap between the two locking plates (203) and the locking beam (2), so that the locking plates (203) are opened into an eight-shaped shape. When the two ends of the movable pulley pin shaft (601) of the ship lift platform (1) are respectively embedded in the pin holes of the maintenance position (201) on the locking plates (203), the locking plates (203) are reset to a vertical state and retracted toward the middle, and then the hook of the floating crane (4) is released to complete the installation of the single-piece ship lift platform (1).

8. The installation method of a large ship lift according to claim 5, characterized in that: In step S3, the locking beam assembly is installed as follows: when pouring concrete in the area where the locking beam assembly is located before step S1, a space is reserved for installing the embedded parts of the locking beam (2), and a secondary pouring is performed after the embedded parts of the locking beam (2) are installed and adjusted in place; after the main beam cantilever in step S3 has completely fallen into the wharf opening (5), the position of the locking beam (2) is adjusted and positioned by the embedded parts of the locking beam (2), and the locking beam (2) is installed.

9. The installation method of a large ship lift according to claim 1, characterized in that: In step S7, the wire rope winding method is specifically as follows: a damping winch (701) is fixedly arranged on the ship lift platform (1), and a working wire rope reel is wound on the damping winch (701). After the wire rope is pulled out from the winding drum of the damping winch (701), it is successively wound around the movable pulley (6) of the ship lift platform (1) and the fixed pulley (204) of the locking beam in the locking assembly, and then it is wound around the movable pulley (6) of the ship lift platform (1) again and wound around the winding drum of the lifting winch (702) for three turns, and is fixed with a rope pressure plate, and the winding drum of the lifting winch (702) is driven to rotate for winding until the wire rope on the damping winch (701) is completely released, and finally the wire rope head on the damping winch (701) is fixedly connected to a fixed point on the locking beam (2) in the locking beam assembly.

10. The installation method of a large ship lift according to claim 1, characterized in that: In step S7, the control system specifically comprises: controlling the controller of each lifting winch (702) uniformly and synchronously by the PLC controller, and firstly raising the height of the overall platform formed by all the ship lift platforms (1) by the lifting winch (702), then adjusting the opening and closing degree of the locking plates (203) of the locking beams (2) in all the locking beam assemblies to an eight-shaped shape, and then slowly lowering the overall platform until the movable pulley pin shaft (601) of each ship lift platform (1) is aligned with the pin hole of a working position (202) of a locking plate (203), and then resetting the position of the locking plate (203) again, completing the process of transferring the overall platform from the maintenance position (201) to the working position (202).

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