Liquefied natural gas (LNG) dock liquid repairing cargo pump supporting and hoisting device

Abstract

The invention provides an LNG (Liquefied Natural Gas) dock liquid repairing cargo pump supporting and hoisting device, which relates to the technical field of shipbuilding and comprises a bottom supporting mechanism and a top positioning mechanism. The bottom supporting mechanism comprises a support and a plurality of lifting lugs, and the support is provided with a positioning channel allowing the liquid cargo pump to be inserted therein. The plurality of hoisting lugs are mounted on the side part of the bracket; the top positioning mechanism comprises two clamping and positioning units and a locking unit used for adjusting the distance between the two clamping and positioning units, the two clamping and positioning units are both movably matched with the top of the support, and a clamping space which is adjustable in size and used for clamping the liquid cargo pump is formed between the two clamping and positioning units; the clamping space is located above the positioning channel and communicates with the positioning channel. When in use, the liquid cargo pump is not easy to damage, and the lifting is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular, to a support and lifting device for a liquid cargo pump during dry dock repair of an LNG ship. Background Art

[0002] The construction of the liquid cargo tank is the most important and most difficult item in the construction process of an LNG (liquefied natural gas) ship. For example, the liquid cargo tank of the NO96 type containment system mainly consists of a secondary insulation layer, a primary insulation layer, a pump tower piping system, and cryogenic liquid cargo pumps, etc. According to different design functions, the cargo pumps are divided into liquid cargo pumps, gas pumps, and stripping pumps. Their main function is to inject and discharge natural gas in the liquid cargo tank to achieve the function of loading and unloading liquefied natural gas. The cargo pump is one of the key core components of the liquid cargo tank of an LNG ship. After the LNG ship is delivered from the shipyard and put into operation, the LNG ship needs to enter the dry dock for regular dry dock repair at regular intervals. In addition to repairing conventional problems, the largest amount of work in the dry dock repair is mainly to conduct an open-tank inspection of the liquid cargo tank and the maintenance and servicing of the cargo pump. According to different habits and requirements of loading liquid cargo, after the service life of the cargo pump reaches a certain time requirement, the service provider needs to disassemble, service, and overhaul the cargo pump. The main material of the liquid cargo tank of the NO96 type LNG ship is Invar steel, which is easily bruised and damaged. Due to the large amount of work in overhauling the cargo pump, the cargo pump is generally disassembled and hoisted out of the cargo tank during dry dock repair. There is a mesh protection at the bottom of the cargo pump, which cannot touch the ground. At the same time, it is necessary to protect the surrounding of the cargo pump from being bruised. In the prior art, no relevant equipment is provided for the hoisting after the disassembly and assembly of the cargo pump. Thus, there is a risk of bruising and damage during the repair of the cargo pump. Summary of the Invention

[0003] An object of the present invention is to provide a support and lifting device for a liquid cargo pump during dry dock repair of an LNG ship, which can reduce the risk of bruising and damage to the liquid cargo pump during repair after disassembly.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a support and lifting device for a liquid cargo pump during dry dock repair of an LNG ship, including:

[0006] A bottom support mechanism and a top positioning mechanism. The bottom support mechanism includes a bracket and a plurality of lifting lugs. The bracket is provided with a positioning channel for the liquid cargo pump to be inserted; a plurality of the lifting lugs are all installed on the side of the bracket; the top positioning mechanism includes two clamping and positioning units and a locking unit for adjusting the distance between the two clamping and positioning units. The two clamping and positioning units are both movably matched with the top of the bracket. A clamping space with an adjustable size for clamping the liquid cargo pump is formed between the two clamping and positioning units. The clamping space is located above the positioning channel and the two are interconnected.

[0007] In an alternative embodiment, the bracket includes a top frame, a plurality of legs and a plurality of connecting rods. The plurality of legs are all installed at the bottom of the top frame, and the plurality of legs are arranged at intervals in a ring shape; in the arrangement direction of the plurality of legs, at least one of the connecting rods is fixedly connected between adjacent legs;

[0008] Both of the clamping and positioning units are slidably engaged with the top frame, and the two clamping and positioning units are arranged oppositely.

[0009] Based on the above solution, the bracket is of a frame structure, with light weight, convenient to move and convenient to cooperate with the liquid cargo pump. During use, the bracket can be hoisted from top to bottom outside the liquid cargo pump with the top frame on top, that is, the liquid cargo pump is located in the positioning channel, which is convenient to operate.

[0010] In an alternative embodiment, each of the clamping and positioning units includes a bearing bottom plate, a sliding plate and a clamping and positioning plate. The bearing bottom plate is positioned at the top of the bracket. The sliding plate is slidably engaged with the bearing bottom plate in a first direction. The clamping and positioning plate is fixedly connected to the sliding plate, and an arc-shaped clamping groove is provided on one side of the clamping and positioning plate;

[0011] The locking unit is simultaneously connected to the clamping and positioning plates of the two clamping and positioning units, and the arc-shaped clamping grooves of the two clamping and positioning plates cooperate to form the adjustable clamping space.

[0012] Based on the above solution, during operation, after the bracket is cooperated with the liquid cargo pump, the bearing bottom plate can be installed on the top of the bracket, that is, the bearing bottom plate is used in cooperation with the top frame, and the bearing bottom plate plays a role of supporting and positioning. At this time, the sliding plate and the clamping and positioning plate are basically in an unfolded state, that is, the clamping space is the largest, which can avoid interference between the clamping and positioning plate and the liquid cargo pump and reduce the probability of collision. Then, operate the sliding plate to drive the clamping and positioning plate to approach the liquid cargo pump. The clamping and positioning plate is located below the step of the liquid cargo pump and is inserted under the step. The liquid cargo pump is located in the arc-shaped clamping groove formed by the clamping and positioning plate, and the two clamping and positioning plates are used in cooperation to clamp and position the liquid cargo pump. Then connect the hoisting equipment to the hoisting lug on the bracket to hoist the liquid cargo pump. During the hoisting process, the clamping and positioning plate contacts the step, and the force applied to the bracket is transmitted to the step through the clamping and positioning plate, so as to hoist the liquid cargo pump, and the operation is convenient and flexible.

[0013] In an alternative embodiment, the clamping and positioning unit further includes a plurality of limiting blocks. The carrying bottom plate has an inner side surface and an outer side surface that are oppositely arranged, and a top plate surface and a bottom plate surface that are connected between the inner side surface and the outer side surface, and the top plate surface and the bottom plate surface are oppositely arranged; the plurality of limiting blocks are all installed on the bottom plate surface, and the plurality of limiting blocks cooperate to form a positioning space, the top of the bracket is clamped in the positioning space, and opposite sides of the bracket in the first direction are respectively abutted against the corresponding limiting blocks to limit the sliding of the carrying bottom plate relative to the bracket in the first direction.

[0014] Based on the above solution, after the carrying bottom plate is placed on the top of the bracket, the bracket is clamped by a plurality of limiting blocks in cooperation. In this way, the carrying bottom plate will not move relative to the bracket in the first direction, will not shake, and the carrying bottom plate will not fall off the bracket, and the hoisting process is safe and reliable.

[0015] In an alternative embodiment, the clamping and positioning unit further includes an anti-shaking assembly, and the anti-shaking assembly is installed on the sliding plate. The anti-shaking assembly is used to cooperate with the carrying bottom plate to limit the sliding plate from driving the liquid cargo pump from the middle of the positioning channel to the edge when clamping the liquid cargo pump.

[0016] Based on the above solution, the carrying bottom plate is fixed relative to the bracket, and the carrying bottom plate will not move relative to the bracket during the hoisting process. However, in order to adjust the position to clamp different models of liquid cargo pumps, the sliding plate needs to slide relative to the carrying bottom plate. In this way, the sliding plate has a risk of shaking. By providing an anti-shaking assembly, after the position of the sliding plate is adjusted, the anti-shaking assembly is used to automatically lock the sliding plate so that it will not move relative to the carrying bottom plate, thereby reducing the risk of shaking and improving the safety of hoisting and operation and maintenance.

[0017] In an alternative embodiment, a receiving groove is provided at the bottom of the sliding plate;

[0018] The anti - sway component includes a driving motor, a transmission shaft, and a plurality of anti - sway plates; the driving motor is fixed on the outer side of the sliding plate, and the driving motor is connected to the transmission shaft; the plurality of anti - sway plates are all connected to the transmission shaft, the plurality of anti - sway plates are arranged in sequence in a fitting manner, and the plurality of anti - sway plates and the transmission shaft are relatively fixed both in the axial direction and the circumferential direction of the transmission shaft; each anti - sway plate is slidably engaged with the transmission shaft in a second direction; the bottom side of each anti - sway plate contacts the top plate surface in the initial state to limit the descent of the anti - sway plate through the top plate surface; and when the anti - sway plate moves along with the sliding plate in the direction of narrowing the clamping space, the plurality of anti - sway plates can sequentially leave the top plate surface and descend under their own gravity; the descended anti - sway plate is used to contact the inner side surface when the liquid cargo pump disengages from the positioning channel in a first direction; the first direction and the second direction are perpendicular.

[0019] Based on the above - mentioned solution, in the initial state, the distance between the two clamping and positioning plates is the largest, the clamping space is the largest, and the operation is convenient. At this time, the bottoms of the plurality of anti - sway plates are all located on the top plate surface of the bearing bottom plate, and the anti - sway plates are carried by the bearing bottom plate. As the sliding plate drives the clamping and positioning plates to approach the liquid cargo pump, that is, the two clamping and positioning plates approach each other, narrowing the size of the clamping space, the anti - sway plate located in the front of the sliding direction leaves the bearing bottom plate first and moves downward under its own gravity. When descending, it moves along the inner side surface of the bearing bottom plate. In this way, the descended anti - sway plate cooperates with the inner side surface, and the anti - sway plate will not slide on the transmission shaft. The external force generated when the liquid cargo pump sways is transmitted to the positioning and clamping plate and the anti - sway plate, and then transmitted to the inner side surface through the anti - sway plate. The inner side surface is a side surface of the bearing bottom plate, and the bearing bottom plate is clamped with the bracket, and the bearing bottom plate will not move. Finally, through the cooperation of the inner side surface and the anti - sway plate, the movement of the clamping and positioning plate in the direction of expanding the clamping space is restricted. After the two clamping and positioning plates cooperate to clamp the liquid cargo pump, the movement of the liquid cargo pump in the radial direction of the positioning channel is restricted, the sway is small, the sliding plate is not easily separated from the bearing bottom plate, and the hoisting process is safe and reliable. At the same time, the anti - sway plate adapts to descend when the clamping and positioning plate moves, playing an automatic anti - sway role, and can adaptively adjust the number of anti - sway plates descending according to the moving distance of the clamping and positioning plate, and is flexible and reliable to use. When the hoisting is completed and the support and hoisting device needs to be removed, start the motor to drive the plurality of anti - sway plates to rotate and leave the inner side surface. At this time, the sliding plate can be operated to retract and leave the liquid cargo pump, and then the subsequent disassembly can be carried out.

[0020] In an alternative embodiment, the anti - sway component further includes a first positioning member and a second positioning member. The first positioning member and the second positioning member are both fixed on the transmission shaft. The first positioning member and the second positioning member cooperate to clamp all the anti - sway plates to limit the movement of the anti - sway plates in the axial direction of the transmission shaft.

[0021] Based on the above solution, by the cooperation of the first positioning member and the second positioning member, a plurality of anti-slosh plates are clamped, ensuring the position stability of the plurality of anti-slosh plates in the axial direction of the transmission shaft and improving the anti-slosh effect. Moreover, the anti-slosh plates can be added or reduced according to requirements, making it flexible to use.

[0022] In an alternative embodiment, an assembly hole is provided on each of the anti-slosh plates, the transmission shaft passes through the assembly hole, and the cross-sectional profile of the shaft section of the transmission shaft passing through the assembly hole is non-circular to restrict the transmission shaft from rotating relative to the assembly hole.

[0023] Based on the above solution, through the cooperation of the assembly hole and the transmission shaft, the anti-slosh plate can move relative to the transmission shaft in the second direction, and it is ensured that the transmission shaft can drive the anti-slosh plate to rotate, thereby realizing the automatic anti-slosh function.

[0024] In an alternative embodiment, a sliding groove is provided on the top plate surface of the bearing bottom plate, a sliding block is provided at the bottom of the sliding plate, and the sliding block is slidably engaged with the sliding groove in the first direction.

[0025] Based on the above solution, through the cooperation of the sliding block and the sliding groove, the function of guiding the sliding of the sliding plate and the bearing bottom plate is achieved, and the sliding is more stable and reliable.

[0026] In an alternative embodiment, the locking unit includes a pull rod and two nuts. Both of the nuts are screwed outside the pull rod. The pull rod passes through both of the clamping and positioning plates at the same time, and the two nuts cooperate to clamp the two clamping and positioning plates to restrict the two clamping and positioning plates from moving away from each other.

[0027] Based on the above solution, when the clamping and positioning plates approach each other and clamp the cargo pump, the two nuts are synchronously tightened and abutted against the outer sides of the two clamping and positioning plates, preventing the two clamping and positioning plates from moving away from each other, improving the clamping force and enhancing the safety.

[0028] The beneficial effects of the LNG shipyard repair cargo pump support and lifting device provided by the embodiments of the present invention include:

[0029] In summary, for the LNG shipyard repair liquid cargo pump support and lifting device provided in this embodiment, after the liquid cargo pump is disassembled, the bottom support mechanism and the top positioning mechanism cooperate to lift the liquid cargo pump out of the shipyard, facilitating operations such as inspection, repair, and maintenance. During specific operations, first suspend the bracket of the bottom support mechanism above the liquid cargo pump, lower the bracket, and the liquid cargo pump is located in the positioning channel. The bottom of the bracket is supported on the shipyard to achieve the positioning of the bracket. Then, operate the top positioning mechanism to move the two clamping and positioning units of the top positioning mechanism closer to each other. The two clamping and positioning units cooperate to clamp outside the liquid cargo pump, and the two clamping and positioning units are located below the step of the liquid cargo pump. After the two clamping and positioning units reach the position, lock the two clamping and positioning units with the locking unit to prevent them from moving away from each other. Then, use a lifting device to cooperate with multiple lifting lugs to lift the bracket. The bracket transfers the force to the clamping and positioning units and finally to the step of the liquid cargo pump, realizing the lifting of the support and lifting device and the liquid cargo pump together to complete the transfer of the liquid cargo pump. During the lifting process, the liquid cargo pump is protected by the cooperation of the bracket and the positioning mechanism, is not easily damaged by collision, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Structural schematic diagram of the LNG shipyard repair liquid cargo pump support and lifting device provided in this embodiment;

[0032] Figure 2 Structural schematic diagram of the bottom support mechanism provided in this embodiment;

[0033] Figure 3 Deformed structural schematic diagram of the LNG shipyard repair liquid cargo pump support and lifting device provided in this embodiment;

[0034] Figure 4 Partial structural schematic diagram of the LNG shipyard repair liquid cargo pump support and lifting device provided in this embodiment;

[0035] Figure 5 Structural schematic diagram of a state of the sliding plate and the anti-slosh plate provided in this embodiment;

[0036] Figure 6 Structural schematic diagram of another state of the sliding plate and the anti-slosh plate provided in this embodiment.

[0037] ICON:

[0038] 001 - First direction; 002 - Second direction; 100 - Bottom support mechanism; 110 - Bracket; 111 - Positioning channel; 112 - Top frame; 113 - Leg; 114 - Connecting rod; 115 - Support plate; 120 - Lifting lug; 200 - Top positioning mechanism; 210 - Clamping and positioning unit; 211 - Bearing bottom plate; 2111 - Sliding groove; 212 - Sliding plate; 2121 - Accommodating groove; 213 - Clamping and positioning plate; 214 - Limit block; 215 - Anti - sway assembly; 2151 - Driving motor; 2152 - Transmission shaft; 2153 - Anti - sway plate; 2154 - First positioning member; 2155 - Second positioning member; 2156 - Assembly hole; 216 - Sliding block; 220 - Locking unit; 221 - Tie rod; 222 - Nut; 230 - Clamping space. Detailed implementation

[0039] In the prior art, when overhauling and repairing a cargo pump, it is necessary to first disassemble the cargo pump and transport it out of the dock compartment. The operation method is to directly use a lifting rope to tie the cargo pump, and use a lifting device to lift the cargo pump out by the lifting rope. During this process, due to the instability of the lifting rope, the cargo pump has a problem of swaying. The swaying of the cargo pump is likely to cause a collision accident, resulting in damage to the cargo pump, and the operation risk is high.

[0040] In view of this, the designer provides a support and lifting device for overhauling the cargo pump in an LNG dock, which can not only realize the lifting and transportation of the cargo pump, but also ensure the safety of the cargo pump during the lifting and transportation process, and is not likely to cause a collision accident, and the operation process is safe and reliable.

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0043] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0045] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0046] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0047] Please refer to Figures 1 - 6 , in this embodiment, the LNG shipyard repair liquid cargo pump support and lifting device includes a bottom support mechanism 100 and a top positioning mechanism 200. The bottom support mechanism 100 includes a bracket 110 and a plurality of lifting lugs 120. The bracket 110 is provided with a positioning channel 111 for inserting the liquid cargo pump; the plurality of lifting lugs 120 are all installed on the side of the bracket 110; the top positioning mechanism 200 includes two clamping and positioning units 210 and a locking unit 220 for adjusting the distance between the two clamping and positioning units 210. The two clamping and positioning units 210 are both movably matched with the top of the bracket 110. A clamping space 230 with an adjustable size for clamping the liquid cargo pump is formed between the two clamping and positioning units 210. The clamping space 230 is located above the positioning channel 111 and the two are interconnected.

[0048] Continuing from the above, the usage method of the LNG shipyard repair liquid cargo pump support and lifting device provided in this embodiment includes, for example:

[0049] After the liquid cargo pump is disassembled, by cooperating with the bottom support mechanism 100 and the top positioning mechanism 200, the liquid cargo pump can be hoisted to leave the dock, which is conducive to operations such as overhaul, repair, and maintenance. During specific operations, first suspend the bracket 110 of the bottom plate support mechanism above the liquid cargo pump, lower the bracket 110, the liquid cargo pump is located in the positioning channel 111, and the bottom of the bracket 110 is supported on the dock to achieve the positioning of the bracket 110. Then, operate the top positioning mechanism 200 to make the two clamping and positioning units 210 of the top positioning mechanism 200 approach each other, and use the two clamping and positioning units 210 to cooperate to clamp outside the liquid cargo pump. The two clamping and positioning units 210 are located below the step of the liquid cargo pump. After the two clamping and positioning units 210 move into place, use the locking unit 220 to lock the two clamping and positioning units 210 to prevent them from moving away from each other. Then, cooperate with the lifting equipment and multiple lifting lugs 120 to lift the bracket 110. The bracket 110 transmits the force to the clamping and positioning unit 210, and finally transmits to the step of the liquid cargo pump, realizing the lifting of the support and hoisting device and the liquid cargo pump together to complete the transfer of the liquid cargo pump. During the hoisting process, the liquid cargo pump is protected by the cooperation of the bracket 110 and the positioning mechanism, is not easily bumped and damaged, and has high safety.

[0050] The details of the support and hoisting device for the LNG dock repair liquid cargo pump in the embodiments of the present application are described below by way of example.

[0051] Please refer to Figure 1 and Figure 2 , in this embodiment, optionally, the bracket 110 includes a top frame 112, multiple legs 113, and multiple connecting rods 114. The multiple legs 113 are all installed at the bottom of the uncle top frame 112, and the multiple legs 113 are arranged at intervals in a ring shape; in the arrangement direction of the multiple legs 113, at least one connecting rod 114 is fixedly connected between adjacent legs 113; both of the two clamping and positioning units 210 are slidably matched with the top frame 112, and the two clamping and positioning units 210 are arranged oppositely.

[0052] For example, the top frame 112 is set as a rectangular frame, which includes four top bars connected end to end in sequence. The top bars can be metal bars, with high strength, not easily deformed, and long service life. Adjacent top bars can be fixedly connected by welding. The number of legs 113 corresponds to four, corresponding to the four corners of the top frame 112 respectively. Each leg 113 is perpendicular to the plane where the top frame 112 is located, and the four legs 113 are arranged in parallel at intervals. A support plate 115 can be provided at the bottom of each leg 113. The support plate 115 has a large contact area with the ground and the support is more stable. The support plate 115 and the leg 113 can be fixedly connected by welding.

[0053] It should be noted that the support 110 has a frame structure, is light in weight, convenient to move, and convenient to cooperate with the liquid cargo pump. When in use, the support 110 can be hoisted from top to bottom outside the liquid cargo pump with the top frame 112 on top, that is, the liquid cargo pump is located in the positioning channel 111, and the operation is convenient.

[0054] Moreover, during actual operation, the two clamping and positioning units 210 are respectively located on opposite sides of the top frame 112. Each clamping and positioning unit 210 can cooperate with three adjacent top rods simultaneously, increasing the contact area, and the cooperation between the clamping and positioning unit 210 and the top frame 112 is stable and reliable.

[0055] Please refer to Figure 3 and Figure 4 , in this embodiment, optionally, each clamping and positioning unit 210 includes a bearing bottom plate 211, a sliding plate 212, and a clamping and positioning plate 213. The bearing bottom plate 211 is positioned at the top of the support 110. The sliding plate 212 is slidably engaged with the bearing bottom plate 211 in the first direction 001. The clamping and positioning plate 213 is fixedly connected to the sliding plate 212. An arc-shaped clamping groove is provided on one side of the clamping and positioning plate 213. The locking unit 220 is simultaneously connected to the clamping and positioning plates 213 of the two clamping and positioning units 210. The arc-shaped clamping grooves of the two clamping and positioning plates 213 cooperate to form an adjustable clamping space 230.

[0056] It should be understood that during operation, after the support 110 is cooperated with the liquid cargo pump, the bearing bottom plate 211 can be installed on the top of the support 110, that is, the bearing bottom plate 211 is used to cooperate with the top frame 112, and the bearing bottom plate 211 plays a role of support and positioning. At this time, the sliding plate 212 and the clamping and positioning plate 213 are basically in an unfolded state, that is, the clamping space 230 is the largest, which can avoid interference between the clamping and positioning plate 213 and the liquid cargo pump and reduce the probability of collision. Then, operate the sliding plate 212 to drive the clamping and positioning plate 213 to approach the liquid cargo pump. The clamping and positioning plate 213 is located below the step of the liquid cargo pump and is inserted below the step. The liquid cargo pump is located in the arc-shaped clamping groove formed by the clamping and positioning plate 213, and the two clamping and positioning plates 213 are used to clamp and position the liquid cargo pump. Then, connect the lifting equipment to the lifting lug 120 on the support 110 to lift the liquid cargo pump. During the lifting process, the clamping and positioning plate 213 contacts the step, and the force applied to the support 110 is transmitted to the step through the clamping and positioning plate 213, so as to lift the liquid cargo pump, and the operation is convenient and flexible.

[0057] In this embodiment, optionally, each clamping and positioning unit 210 further includes a plurality of limiting blocks 214. For example, in this embodiment, each clamping and positioning unit 210 further includes four limiting blocks 214. Among them, two limiting blocks 214 form a group, and a positioning space is formed between the two limiting blocks 214 in the same group. The plurality of positioning spaces on the same bearing bottom plate 211 are located on the same straight line, so as to facilitate the clamping and cooperation with the top rod. The bearing bottom plate 211 has an inner side surface and an outer side surface which are oppositely arranged, and a top plate surface and a bottom plate surface connected between the inner side surface and the outer side surface. The top plate surface and the bottom plate surface are oppositely arranged. Specifically, the plurality of limiting blocks 214 are all installed on the bottom plate surface. During assembly, the top rod of the bracket 110 is clamped in the positioning space. In this way, the two opposite sides of the bracket 110 in the first direction 001 are respectively abutted against the corresponding limiting blocks 214 to limit the sliding of the bearing bottom plate 211 relative to the bracket 110 in the first direction 001.

[0058] With such a design, when the bearing bottom plate 211 is placed on the top of the bracket 110, the plurality of limiting blocks 214 are used to clamp and hold the bracket 110. In this way, the bearing bottom plate 211 will not move relative to the bracket 110 in the first direction 001, will not shake, and the bearing bottom plate 211 will not fall off the bracket 110, and the hoisting process is safe and reliable. When the sliding plate 212 moves relative to the bearing bottom plate 211, the position of the bearing bottom plate 211 is firm and will not move along with the sliding plate 212, which is beneficial to controlling the position of the sliding plate 212.

[0059] In this embodiment, optionally, the clamping and positioning unit 210 further includes an anti-shaking assembly 215. The anti-shaking assembly 215 is installed on the sliding plate 212, and the anti-shaking assembly 215 is used to cooperate with the bearing bottom plate 211 to limit the sliding plate 212 from driving the liquid cargo pump to move from the middle of the positioning channel 111 to the edge when clamping the liquid cargo pump.

[0060] It should be understood that the bearing bottom plate 211 is fixed relative to the bracket 110, and the bearing bottom plate 211 will not move relative to the bracket 110 during the hoisting process. However, in order to adjust the position to clamp liquid cargo pumps of different models, the sliding plate 212 needs to slide relative to the bearing bottom plate 211. Thus, there is a risk of shaking for the sliding plate 212. By providing the anti-shaking assembly 215, after the position of the sliding plate 212 is adjusted, the anti-shaking assembly 215 automatically locks the sliding plate 212 so that it will not move relative to the bearing bottom plate 211, thereby reducing the risk of shaking and improving the safety of hoisting and operation and maintenance.

[0061] Please combine Figures 3 - 6, optionally, a receiving groove 2121 is provided at the bottom of the sliding plate 212. The anti-vibration assembly 215 includes a driving motor 2151, a transmission shaft 2152, and a plurality of anti-vibration plates 2153. The driving motor 2151 is fixed to the outside of the sliding plate 212, and the driving motor 2151 is connected to the transmission shaft 2152; a plurality of anti-vibration plates 2153 are all connected to the transmission shaft 2152, and the plurality of anti-vibration plates 2153 are arranged in a fitting manner in sequence. The plurality of anti-vibration plates 2153 and the transmission shaft 2152 are relatively fixed both in the axial direction and the circumferential direction of the transmission shaft 2152; each anti-vibration plate 2153 is slidably engaged with the transmission shaft 2152 in the second direction 002; the bottom side of each anti-vibration plate 2153 is in contact with the top plate surface in the initial state to limit the anti-vibration plate 2153 from descending through the top plate surface; and when the anti-vibration plate 2153 moves along with the sliding plate 212 in the direction of reducing the clamping space 230, the plurality of anti-vibration plates 2153 can sequentially leave the top plate surface to descend under their own gravity; the anti-vibration plate 2153 after descending is used to contact the inner side surface when the liquid cargo pump disengages from the positioning channel 111 in the first direction 001; the first direction 001 and the second direction 002 are perpendicular.

[0062] In the initial state, the distance between the two clamping and positioning plates 213 is the largest, and the clamping space 230 is the largest, which is convenient for operation. At this time, the bottoms of the multiple anti-slosh plates 2153 are all located on the top surface of the bearing bottom plate 211, and the anti-slosh plates 2153 are borne by the bearing bottom plate 211. As the sliding plate 212 drives the clamping and positioning plates 213 to approach the cargo pump, that is, the two clamping and positioning plates 213 approach each other, reducing the size of the clamping space 230. The anti-slosh plate 2153 located in front of the sliding direction first leaves the bearing bottom plate 211 and moves downward under its own gravity. When descending, it moves along the inner side surface of the bearing bottom plate 211. In this way, the descended anti-slosh plate 2153 cooperates with the inner side surface, and the anti-slosh plate 2153 will not slide on the transmission shaft 2152. The external force generated when the cargo pump shakes is transmitted to the positioning clamping plate and the anti-slosh plate 2153, and then transmitted to the inner side surface through the anti-slosh plate 2153. The inner side surface is a side surface of the bearing bottom plate 211, and the bearing bottom plate 211 is clamped with the bracket 110, and the bearing bottom plate 211 will not move. Finally, through the cooperation of the inner side surface and the anti-slosh plate 2153, the movement of the clamping and positioning plate 213 in the direction of expanding the clamping space 230 is restricted. After the two clamping and positioning plates 213 cooperate to clamp the cargo pump, the movement of the cargo pump in the radial direction of the positioning channel 111 is restricted, the shaking is small, the sliding plate 212 is not easily separated from the bearing bottom plate 211, and the hoisting process is safe and reliable. At the same time, the anti-slosh plate 2153 adaptively descends when the clamping and positioning plate 213 moves, playing an automatic anti-slosh role, and can adaptively adjust the number of anti-slosh plates 2153 descending according to the moving distance of the clamping and positioning plate 213, with flexible and reliable use. When the hoisting is completed and the support and lifting device needs to be removed, start the motor to drive the multiple anti-slosh plates 2153 to rotate and leave the inner side surface. At this time, the sliding plate 212 can be operated to retract and leave the cargo pump, and then the subsequent disassembly can be carried out.

[0063] It should be understood that the number of the anti-slosh plates 2153 can be set as required, and the thickness of the anti-slosh plates 2153 can be selected as required. When the thickness of the anti-slosh plates 2153 decreases, the control accuracy is higher. Therefore, in actual design, the thickness of the anti-slosh plates 2153 is set at 3-5 mm, which can not only ensure a good limiting effect but also ensure sufficient strength and is not easily deformed. In addition, the anti-slosh plates 2153 can be made of alloys with higher strength.

[0064] Further, the anti-vibration assembly 215 further includes a first positioning member 2154 and a second positioning member 2155. Both the first positioning member 2154 and the second positioning member 2155 are fixed on the transmission shaft 2152. The first positioning member 2154 and the second positioning member 2155 cooperate to clamp all the anti-vibration plates 2153 to limit the axial movement of the anti-vibration plates 2153 on the transmission shaft 2152. By the cooperation of the first positioning member 2154 and the second positioning member 2155 to clamp a plurality of anti-vibration plates 2153, the position stability of the plurality of anti-vibration plates 2153 in the axial direction of the transmission shaft 2152 is ensured, and the anti-vibration effect is improved. Moreover, the anti-vibration plates 2153 can be added or reduced according to requirements, making it flexible to use.

[0065] In this embodiment, optionally, each anti-vibration plate 2153 is provided with an assembly hole 2156, and the assembly hole 2156 can be a rectangular hole. The transmission shaft 2152 passes through the assembly hole 2156, and the cross-sectional profile of the shaft section of the transmission shaft 2152 passing through the assembly hole 2156 is non-circular to limit the rotation of the transmission shaft 2152 relative to the assembly hole 2156. For example, the transmission shaft 2152 includes a first shaft section, a second shaft section, and a third shaft section of an integral structure. Both the first shaft section and the third shaft section are cylindrical, and the second shaft section is rectangular. The second shaft section passes through the assembly holes 2156 of a plurality of anti-vibration plates 2153, and the first shaft section is fixedly connected to the drive motor 2151. In this way, the anti-vibration plate 2153 can slide in the second direction 002 under its own gravity relative to the transmission shaft 2152, but the anti-vibration plate 2153 will not rotate relative to the transmission shaft 2152, but can rotate together under the drive of the transmission shaft 2152.

[0066] In this embodiment, optionally, the top plate surface of the bearing bottom plate 211 is provided with a sliding groove 2111, and the bottom of the sliding plate 212 is provided with a sliding block 216. The sliding block 216 and the sliding groove 2111 are slidably matched in the first direction 001. Through the cooperation of the sliding block 216 and the sliding groove 2111, the function of guiding the sliding of the sliding plate 212 and the bearing bottom plate 211 is achieved, and the sliding is more stable and reliable.

[0067] In addition, the sliding block 216 and the sliding groove 2111 can be set to a mutually matching T-shaped structure or dovetail-shaped structure, so that the cooperation between the sliding block 216 and the sliding groove 2111 is closer, and the sliding block 216 is not easily disengaged from the sliding groove 2111.

[0068] In this embodiment, optionally, the locking unit 220 includes a pull rod 221 and two nuts 222. The two nuts 222 are both screwed outside the pull rod 221. The pull rod 221 passes through the two clamping and positioning plates 213 at the same time. The two nuts 222 cooperate to clamp the two clamping and positioning plates 213 to limit the two clamping and positioning plates 213 from moving away from each other. When the clamping and positioning plates 213 approach each other and clamp the cargo pump, the two nuts 222 are tightened synchronously and abut against the outer sides of the two clamping and positioning plates 213 to prevent the two clamping and positioning plates 213 from moving away from each other, improve the clamping force, and improve safety.

[0069] It should be understood that the two clamping and positioning plates 213 can be locked by the cooperation of the two locking units 220. For example, the two locking units 220 are respectively located on both sides of the cargo pump, and the forces on the two clamping and positioning plates 213 are more balanced, and the clamping effect is good.

[0070] The LNG dock repair cargo pump support and lifting device provided by this embodiment can not only successfully lift the cargo pump through the cooperation of the bottom support mechanism 100 and the top clamping mechanism, but also ensure that the cargo pump is not damaged during the lifting process, improving the safety and reliability of the lifting.

[0071] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A support lifting device for LNG shipyard repaired liquid cargo pumps, characterized in that, Comprising: A bottom support mechanism (100) and a top positioning mechanism (200), the bottom support mechanism (100) includes a bracket (110) and a plurality of lifting lugs (120), the bracket (110) is provided with a positioning channel (111) for inserting a liquid cargo pump; a plurality of the lifting lugs (120) are all installed on the side of the bracket (110); the top positioning mechanism (200) includes two clamping and positioning units (210) and a locking unit (220) for adjusting the distance between the two clamping and positioning units (210), the two clamping and positioning units (210) are both movably matched with the top of the bracket (110), a clamping space (230) with adjustable size and used for clamping the liquid cargo pump is formed between the two clamping and positioning units (210), the clamping space (230) is located above the positioning channel (111) and the two are interconnected.

2. The LNG shipyard repair liquid cargo pump support and lifting device according to claim 1, wherein: The bracket (110) includes a top frame (112), a plurality of legs (113) and a plurality of connecting rods (114), the plurality of legs (113) are all installed at the bottom of the top frame (112), and the plurality of legs (113) are arranged at intervals in a ring shape; in the arrangement direction of the plurality of legs (113), at least one of the connecting rods (114) is fixedly connected between adjacent legs (113); The two clamping and positioning units (210) are both slidably matched with the top frame (112), and the two clamping and positioning units (210) are arranged oppositely.

3. The LNG shipyard repair liquid cargo pump support and lifting device according to claim 1, wherein: Each clamping and positioning unit (210) includes a bearing bottom plate (211), a sliding plate (212) and a clamping and positioning plate (213), the bearing bottom plate (211) is positioned at the top of the bracket (110), the sliding plate (212) is slidably matched with the bearing bottom plate (211) in a first direction (001), the clamping and positioning plate (213) is fixedly connected to the sliding plate (212), and an arc-shaped clamping groove is arranged on one side of the clamping and positioning plate (213); The locking unit (220) is simultaneously connected to the clamping and positioning plates (213) of the two clamping and positioning units (210), and the arc-shaped clamping grooves of the two clamping and positioning plates (213) cooperate to form the clamping space (230) with adjustable size.

4. The LNG shipyard repair liquid cargo pump support and lifting device according to claim 3, wherein: The clamping and positioning unit (210) further includes a plurality of limiting blocks (214). The bearing bottom plate (211) has an inner side surface and an outer side surface which are oppositely arranged, and a top plate surface and a bottom plate surface connected between the inner side surface and the outer side surface. The top plate surface and the bottom plate surface are oppositely arranged. The plurality of limiting blocks (214) are all installed on the bottom plate surface. The plurality of limiting blocks (214) cooperate to form a positioning space. The top of the bracket (110) is clamped in the positioning space. Opposite sides of the bracket (110) in the first direction (001) are respectively abutted against the corresponding limiting blocks (214) to limit the sliding of the bearing bottom plate (211) relative to the bracket (110) in the first direction (001).

5. The LNG shipyard repair liquid cargo pump support and lifting device according to claim 4, wherein: The clamping and positioning unit (210) further includes an anti-shake assembly (215). The anti-shake assembly (215) is installed on the sliding plate (212). The anti-shake assembly (215) is used to cooperate with the bearing bottom plate (211) to limit the sliding plate (212) from driving the liquid cargo pump to move from the middle of the positioning channel (111) to the edge when clamping the liquid cargo pump.

6. The LNG shipyard repair liquid cargo pump support and lifting device according to claim 5, wherein: A receiving groove (2121) is provided at the bottom of the sliding plate (212); The anti-shake assembly (215) includes a driving motor (2151), a transmission shaft (2152) and a plurality of anti-shake plates (2153). The driving motor (2151) is fixed on the outer side of the sliding plate (212). The driving motor (2151) is connected to the transmission shaft (2152). The plurality of anti-shake plates (2153) are all connected to the transmission shaft (2152). The plurality of anti-shake plates (2153) are arranged in sequence in a fitting manner. The plurality of anti-shake plates (2153) and the transmission shaft (2152) are relatively fixed both in the axial direction and the circumferential direction of the transmission shaft (2152). Each anti-shake plate (2153) is slidably matched with the transmission shaft (2152) in the second direction (002). The bottom side of each anti-shake plate (2153) is in contact with the top plate surface in the initial state to limit the downward movement of the anti-shake plate (2153) through the top plate surface. And when the anti-shake plate (2153) moves along with the sliding plate (212) in the direction of reducing the clamping space (230), the plurality of anti-shake plates (2153) can sequentially leave the top plate surface and descend under their own gravity. The descended anti-shake plate (2153) is used to contact the inner side surface when the liquid cargo pump disengages from the positioning channel (111) in the first direction (001). The first direction (001) and the second direction (002) are perpendicular.

7. The LNG shipyard repair liquid cargo pump support and lifting device according to claim 6, wherein: The anti-vibration assembly (215) further includes a first positioning member (2154) and a second positioning member (2155). Both the first positioning member (2154) and the second positioning member (2155) are fixed on the transmission shaft (2152). The first positioning member (2154) and the second positioning member (2155) cooperate to clamp all the anti-vibration plates (2153) to limit the axial movement of the anti-vibration plates (2153) on the transmission shaft (2152).

8. The LNG dock repair liquid cargo pump support lifting device according to claim 7, wherein: Each of the anti-vibration plates (2153) is provided with an assembly hole (2156). The transmission shaft (2152) passes through the assembly hole (2156). The cross-sectional profile of the shaft section of the transmission shaft (2152) passing through the assembly hole (2156) is non-circular to limit the rotation of the transmission shaft (2152) relative to the assembly hole (2156).

9. The LNG dock repair liquid cargo pump support lifting device according to claim 3, wherein: The top plate surface of the bearing bottom plate (211) is provided with a sliding groove (2111). The bottom of the sliding plate (212) is provided with a sliding block (216). The sliding block (216) and the sliding groove (2111) are slidably matched in the first direction (001).

10. The LNG dock repair liquid cargo pump support lifting device according to claim 3, wherein: The locking unit (220) includes a pull rod (221) and two nuts (222). Both the two nuts (222) are screwed outside the pull rod (221). The pull rod (221) passes through both the clamping and positioning plates (213) at the same time. The two nuts (222) cooperate to clamp the two clamping and positioning plates (213) to limit the two clamping and positioning plates (213) from moving away from each other.

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