A tool for quickly lifting a flexible felt of a tank wall in a full tank

Abstract

The application discloses a tool for rapidly lifting an elastic felt of a tank wall in a full-capacity tank, and particularly relates to the full-capacity tank construction technical field, which comprises an outer tank and an inner tank, the inner tank is located in the outer tank, and the top end of the inner tank is provided with a ceiling; a layer is formed between the inner tank and the outer tank; and the inner top end of the outer tank is provided with an annular guide rail. The tool is used for elastic felt construction, and a roll of elastic felt does not need to be hoisted and transported above the ceiling of the inner tank, and then unwound and laid from top to bottom, so that the construction is fast, the time for installing one piece of elastic felt is shortened from about 2 hours to about 15 minutes compared with the original construction mode, the work efficiency is greatly improved, a large number of operation links can be transferred to the ground and the safe area of the tank bottom, that is, most of the operators can work on the ground and the tank bottom, so that the risk of high-altitude operation is effectively avoided, the construction safety is improved, and the project safety management cost and the accident rate are obviously reduced.

Description

Technical Field

[0001] This invention relates to the field of construction technology for full-containment tanks, and specifically to a tooling for rapidly lifting the elastic felt inside the full-containment tank wall. Background Technology

[0002] A full-containment storage tank consists of a main container and a secondary container, forming a complete storage system. The main container adopts a self-supporting single-wall steel design, specifically for storing cryogenic liquids. A suspended ceiling is installed on the top of the main container. The space between the main and secondary containers is filled with insulation materials such as glass bricks, elastic glass felt, and perlite for cold and heat preservation. This storage tank structure is not only safe and reliable, but also has advantages such as small footprint, mature technology, and low operating costs, and is therefore widely used in practice.

[0003] Full-containment tanks are key equipment in cryogenic environments such as liquid air energy storage power plants, LNG receiving terminals, and air separation plants, bearing the important responsibility of storing large quantities of cryogenic liquids. Their design, construction, and operation management must adhere to a series of stringent standards to ensure the safe, stable, and economical storage of cryogenic liquids. Full-containment tanks not only possess excellent low-temperature resistance and good seismic resistance but also employ advanced construction techniques and robust insulation measures. In practical applications, full-containment tanks are widely favored due to their high safety, small footprint, mature technology, and low operating costs. Currently, they have become the mainstream choice in domestic LNG receiving terminals and liquid air energy storage projects.

[0004] To compensate for the displacement caused by thermal expansion and contraction of the main container and to maintain the stability of the perlite in the interlayer between the main and secondary containers, elastic glass felt is usually laid on the outer wall of the main container. The construction of the elastic glass felt is carried out after the water-filling test of the inner tank is completed. The elastic felt is generally two layers, with the outermost layer protected by glass cloth, hanging down from the top of the inner tank wall to the bottom, and fixed to the tank wall by insulation nails.

[0005] Current methods for installing elastic felt typically involve unrolling it from the top of the tank and then gradually lowering it to the bottom. This means hoisting the entire roll of elastic felt to the top of the tank, transporting it through the manhole to the inner ceiling, unrolling it, and then laying it down to the bottom of the tank on the outer wall of the inner tank. Before installation, a crane is needed to lift the roll of elastic felt to the top of the tank, and then it is manually transported to the laying position. This process is not only inefficient and labor-intensive, but also involves working at heights, which poses certain dangers. Furthermore, when laying the elastic felt from top to bottom, it is easily snagged by the insulation nails on the outer surface of the inner tank wall, causing damage to the elastic felt and affecting the smoothness of the installation. Summary of the Invention

[0006] The purpose of this invention is to provide a tooling for rapidly lifting the elastic felt inside a full-containment tank wall, which can lift the elastic felt from bottom to top, solving the problems of low efficiency and difficult construction when laying elastic felt from top to bottom.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a tooling for rapidly lifting the elastic felt of the inner wall of a full-containment tank, comprising an outer tank and an inner tank, wherein the inner tank is located inside the outer tank and a suspended ceiling is provided at the top of the inner tank, an interlayer is formed between the inner tank and the outer tank, an annular guide rail is provided at the top of the inner side of the outer tank, and the annular guide rail is arranged around the interlayer, and an electric hoist is connected to the bottom side of the annular guide rail via a sliding seat; A reserved construction doorway is provided below the side wall of the outer tank, and a first roller is provided at the top edge of the inner side of the reserved construction doorway. A support frame is provided on one side of the reserved construction doorway. One end of the support frame is rotatably connected to a second roller via a bearing, and the other end of the support frame is rotatably installed with a third roller. The third roller is used to mount a rolled elastic felt, and the end of the elastic felt can extend into the interlayer by passing around the second roller and the first roller in sequence, and be hooked to the hook of the electric hoist.

[0008] Preferably, a fixed baffle is fixed to one end of the third roller, and a movable baffle is slidably sleeved on the other end of the third roller, and a locking component is provided between the movable baffle and the third roller.

[0009] Preferably, the locking assembly includes a sleeve disposed on the outside of the movable baffle, the sleeve being fitted over the third roller, and threaded grooves being symmetrically provided at both ends of the sleeve, a fixing knob being screwed onto the threaded groove, and a rubber head facing the third roller being provided at the end of the fixing knob.

[0010] Preferably, a fixing plate is provided on the inner side of the support frame near the lower part of the third roller. A groove is provided on the top side of the fixing plate. Second springs are symmetrically fixed at both ends inside the groove. Each adjacent end of the two second springs is connected to a limit block. The limit block is slidably connected in the groove, and a first spring is fixed between the two limit blocks. The top ends of the two limit blocks are symmetrically connected to connecting rods through a rotating shaft. A connecting frame is movably connected between the top ends of the two connecting rods through a rotating shaft. A limiting component is provided between the connecting frame and the fixing plate, and a pressure roller facing the third roller is rotatably connected to the top end of the connecting frame.

[0011] Preferably, a limiting rod is fixedly connected inside the groove, and the limiting block, the first spring, and the second spring are all sleeved outside the limiting rod.

[0012] Preferably, the limiting component includes guide grooves symmetrically arranged at both ends of the fixed plate, and a guide post is connected through the inside of the guide groove, with the top end of the guide post fixedly connected to the connecting frame.

[0013] Preferably, a hydraulic cylinder is fixed to the bottom inner side of the support frame near the fixed plate, and the output end of the hydraulic cylinder is fixedly connected to the fixed plate.

[0014] Preferably, the fixed plate is provided with sliders symmetrically at both ends, and the inner side of the support frame is provided with a groove that matches the slider.

[0015] Preferably, the length of the second roller is greater than the width of the elastic felt.

[0016] Preferably, the bottom of the outer tank is provided with a support platform.

[0017] The technical effects and advantages provided by the present invention in the above technical solution are as follows: Using the tooling of this invention for elastic felt construction eliminates the need to hoist and transport the rolled elastic felt to the top of the inner tank ceiling and then unroll it to lay it from top to bottom. Construction is quick and efficient. Compared with the original construction method, the time to install one elastic felt is reduced from about 2 hours to about 15 minutes, which greatly improves work efficiency. Using the tooling of the present invention for elastic felt construction can transfer a large number of work processes to the ground and the bottom of the tank, meaning that most workers can work on the ground and at the bottom of the tank, thereby effectively avoiding the risks of working at heights, improving construction safety, and significantly reducing project safety management costs and accident rates. Using the tooling of this invention for elastic felt construction allows the elastic felt to be hoisted from bottom to top. Since the elastic felt is close to the outer tank wall, it does not come into contact with the inner tank wall insulation nails during the entire lifting process, thus avoiding being hooked by the insulation nails and preventing damage to the elastic felt. This effectively ensures the integrity and continuity of the insulation layer and greatly guarantees the cold insulation performance of the full-containment tank for low-temperature liquid storage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is one of the structural schematic diagrams of the support frame of the present invention; Figure 3 This is the second schematic diagram of the support frame of the present invention; Figure 4 This is a schematic diagram of the connection structure between the third roller and the pressure roller on the support frame of the present invention; Figure 5 This is a schematic diagram of the connection structure between the fixing plate and the connecting frame of the present invention; Figure 6 This is a longitudinal sectional view of the card sleeve and movable baffle of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Circular guide rail; 2. Electric hoist; 3. First roller; 4. Second roller; 5. Third roller; 6. Support frame; 7. Outer tank; 8. Inner tank; 9. Interlayer; 10. Reserved construction doorway; 11. Fixed baffle; 12. Movable baffle; 13. Sleeve; 14. Threaded groove; 15. Fixed knob; 16. Rubber head; 17. Fixed plate; 18. Groove; 19. Limiting block; 20. Connecting rod; 21. Connecting frame; 22. Pressure roller; 23. Limiting rod; 24. First spring; 25. Second spring; 26. Guide groove; 27. Guide column; 28. Sliding block; 29. ​​Slide groove; 30. Hydraulic cylinder; 31. Suspended ceiling. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the present invention provides a tooling for rapid lifting of the elastic felt of the inner wall of a full-containment tank. The tooling is applied to a full-containment tank mainly composed of an inner tank 8 (as the main container), an outer tank 7 (as the secondary container) and a ceiling 31 on the top of the main container, wherein the inner tank 8 is located inside the outer tank 7 and an interlayer 9 is formed between the inner tank 8 and the outer tank 7. Specifically, the tooling includes a circular guide rail 1, an electric hoist 2, a reserved construction doorway 10, and a support frame 6. The circular guide rail 1 is made of I-beams or rail steel. The track beam of the entire circular guide rail 1 is installed on the inner surface of the outer arch, above the interlayer 9, and around the interlayer 9, so that the electric hoist 2 can run to any position around the interlayer 9. The specific model of the electric hoist 2 is determined according to the maximum lifting load during construction. It can be controlled on-site or remotely. The lifting height of the electric hoist 2 can be determined according to the height of the tank. The reserved construction doorway 10 is located below the side wall of the outer tank 7. In this embodiment, a first roller 3 can be installed above the opening of the reserved construction doorway 10. The first roller 3 can prevent the tank wall from scratching the elastic felt, allowing the elastic felt to enter the tank more smoothly. The first roller 3 can be made of a steel pipe with a smooth outer surface or a special roller with bearings. The length of the first roller 3 is determined according to the width of the elastic felt, and is usually more than 300mm longer than the width of the elastic felt.

[0023] In one specific embodiment of the present invention, please refer to the following: Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the support frame 6 is located on one side of the reserved construction doorway 10. One end of the support frame 6 is rotatably connected to the second roller 4 via a bearing, and the other end of the support frame 6 is rotatably mounted with a third roller 5. The third roller 5 is used to mount a rolled elastic felt, and the end of the elastic felt can successively pass around the second roller 4 and the first roller 3 to extend into the interlayer 9 and be hooked to the hook of the electric hoist 2. During construction, the electric hoist 2 can be stopped above the reserved construction doorway 10, and the rolled elastic felt can be mounted on the third roller 5. When pulled, it can rotate freely. In this embodiment, one end of the third roller 5 is fixed with A fixed baffle 11 is provided, and a movable baffle 12 is slidably sleeved on the other end of the third roller 5. A locking assembly is provided between the movable baffle 12 and the third roller 5. The locking assembly includes a retainer 13 located outside the movable baffle 12. The retainer 13 is sleeved on the third roller 5, and threaded grooves 14 are symmetrically provided at both ends of the retainer 13. A fixing knob 15 is screwed onto the threaded groove 14, and a rubber head 16 facing the third roller 5 is provided at the end of the fixing knob 15. Based on this, after a roll of elastic felt is sleeved on the third roller 5, the fixed baffle 11 at one end can block the elastic felt, while the retainer can be installed at the other end. 13 and the movable baffle 12 are brought close to the other end of the elastic felt. Then, the fixing knob 15 is turned to press the rubber head 16 against the outer wall of the third roller 5, thereby fixing the movable baffle 12 and securing the elastic felt to the third roller 5. Then, the end of the elastic felt is pulled out, passing over the second roller 4 and the first roller 3, and then hung on the hook of the electric hoist 2. Then, the electric hoist 2 is controlled by the remote control to stretch the upper end of the elastic felt to the top of the inner tank 8. Then, the electric hoist 2 is controlled to run along the annular guide rail 1 until the installation position is reached. Finally, the upper end of the elastic felt is installed and suspended on the side wall of the inner tank 8. Compared with existing technologies, this construction method eliminates the need to hoist and transport the rolled elastic felt above the ceiling 31 of the inner tank 8 before unrolling and laying it from top to bottom. This makes construction faster and reduces the time to install one elastic felt from 2 hours to 15 minutes, greatly improving work efficiency. Furthermore, the tooling of this invention allows most workers to work on the ground and at the bottom of the tank, avoiding working at heights and ensuring construction safety. Since the elastic felt is hoisted from bottom to top and is close to the side wall of the outer tank 7, it will not be hooked by the insulation nails on the outer surface of the side wall of the inner tank 8, thus preventing damage to the elastic felt.

[0024] In one specific embodiment of the present invention, please refer to the following: Figure 3 and Figure 4As shown, a fixing plate 17 is provided on the inner side of the support frame 6 near the lower part of the third roller 5. A groove 18 is provided on the top side of the fixing plate 17. Two second springs 25 are symmetrically fixed at both ends inside the groove 18. Each adjacent end of the two second springs 25 is connected to a limit block 19. The limit block 19 is slidably connected in the groove 18, and a first spring 24 is fixed between the two limit blocks 19. In this embodiment, a limit rod 23 is fixedly connected inside the groove 18. The limit blocks 19, the first spring 24, and the second springs 25 are all sleeved on the limit rod 23. Based on this, the stability of the structure can be greatly enhanced by the limit rod 23. The top of each block 19 is symmetrically connected to a connecting rod 20 via a pivot. The top of each connecting rod 20 is movably connected to a connecting frame 21 via a pivot. A limiting component is provided between the connecting frame 21 and the fixed plate 17. The limiting component includes guide grooves 26 symmetrically arranged at both ends of the fixed plate 17. A guide post 27 is connected through the inside of the guide groove 26. The top of the guide post 27 is fixedly connected to the connecting frame 21. By setting the guide post 27 and the guide groove 26, the connecting frame 21 can be further supported and limited, thereby greatly ensuring the stability of the pressure roller 22 when it is raised and lowered. The top of the connecting frame 21 is rotatably connected to the pressure roller 22 facing the third roller 5.

[0025] As can be seen from the above, during use, by pressing the pressure roller 22 down, the pressure roller 22 drives the connecting rod 20 to move through the connecting frame 21. The connecting rod 20 can drive the limiting block 19 to move in the groove 18 and squeeze the second spring 25 at both ends, while pulling the first spring 24. When the elastic felt is fitted onto the third roller 5, the rebound of the second spring 25 and the first spring 24 can cause the connecting frame 21 to drive the pressure roller 22 to reset, so that the pressure roller 22 is pressed tightly on the bottom side of the elastic felt, thereby tightening the elastic felt onto the third roller 5 and preventing the elastic felt from being loosened directly on the third roller 5.

[0026] In this embodiment, a hydraulic cylinder 30 is fixed to the bottom inner side of the support frame 6 near the lower part of the fixed plate 17. The output end of the hydraulic cylinder 30 is fixedly connected to the fixed plate 17. Slider 28s are symmetrically arranged at both ends of the fixed plate 17. The inner side of the support frame 6 is provided with a sliding groove 29 that matches the slider 28. Based on this, the fixed plate 17 can be moved by the hydraulic cylinder 30, which can cause the fixed plate 17 to drive the slider 28 to slide along the sliding groove 29. Then, the fixed plate 17 can drive the pressure roller 22 to rise and fall stably through the connecting frame 21, thereby further adjusting the height of the pressure roller 22 to better press the elastic felt of different roll thicknesses, which greatly improves the use effect of the device.

[0027] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tooling for rapid lifting of elastic felt on the inner wall of a full-containment tank, comprising an outer tank (7) and an inner tank (8), wherein the inner tank (8) is located inside the outer tank (7), and a ceiling (31) is provided at the top of the inner tank (8), and a sandwich layer (9) is formed between the inner tank (8) and the outer tank (7), characterized in that: The inner top of the outer tank (7) is provided with an annular guide rail (1), and the annular guide rail (1) is arranged around the interlayer (9). The bottom side of the annular guide rail (1) is connected to an electric hoist (2) through a slide block. The outer tank (7) has a reserved construction door opening (10) below the side wall, and the inner top edge of the reserved construction door opening (10) is provided with a first roller (3). Support frame (6), the support frame (6) is located on one side of the reserved construction doorway (10), and one end of the support frame (6) is rotatably connected to the second roller (4) through the bearing, and the other end of the support frame (6) is rotatably installed with the third roller (5). The third roller (5) is used to mount the rolled elastic felt, and the end of the elastic felt can pass around the second roller (4) and the first roller (3) in sequence to extend into the interlayer (9) and be hung on the hook of the electric hoist (2); A fixing plate (17) is provided on the inner side of the support frame (6) near the lower part of the third roller (5). A groove (18) is provided on the top side of the fixing plate (17). Two second springs (25) are symmetrically fixed at both ends inside the groove (18). Each adjacent end of the two second springs (25) is connected to a limit block (19). The limit block (19) is slidably connected in the groove (18), and a first spring (24) is fixed between the two limit blocks (19). The top ends of the two limit blocks (19) are symmetrically connected to a connecting rod (20) through a rotating shaft. A connecting frame (21) is movably connected between the top ends of the two connecting rods (20) through a rotating shaft. A limit component is provided between the connecting frame (21) and the fixing plate (17), and a pressure roller (22) facing the third roller (5) is rotatably connected to the top end of the connecting frame (21). One end of the third roller (5) is fixed with a fixed baffle (11), and the other end of the third roller (5) is slidably fitted with a movable baffle (12). A locking assembly is provided between the movable baffle (12) and the third roller (5). The locking assembly includes a sleeve (13) provided on the outside of the movable baffle (12). The sleeve (13) is fitted on the outside of the third roller (5), and threaded grooves (14) are symmetrically provided at both ends of the sleeve (13). A fixed knob (15) is screwed onto the threaded groove (14), and a rubber head (16) facing the third roller (5) is provided at the end of the fixed knob (15).

2. The tooling for rapid lifting of the elastic felt inside a full-containment tank according to claim 1, characterized in that: The groove (18) is fixedly connected to a limiting rod (23), and the limiting block (19), the first spring (24), and the second spring (25) are all sleeved on the limiting rod (23).

3. The tooling for rapid lifting of the elastic felt inside a full-containment tank according to claim 1, characterized in that: The limiting component includes guide grooves (26) symmetrically arranged at both ends of the fixed plate (17), and a guide post (27) is connected through the inside of the guide groove (26). The top end of the guide post (27) is fixedly connected to the connecting frame (21).

4. The tooling for rapid lifting of the elastic felt inside a full-containment tank according to claim 1, characterized in that: A hydraulic cylinder (30) is fixed at the bottom inner side of the support frame (6) near the bottom of the fixing plate (17), and the output end of the hydraulic cylinder (30) is fixedly connected to the fixing plate (17).

5. The tooling for rapid lifting of the elastic felt inside a full-containment tank according to claim 4, characterized in that: The fixed plate (17) has sliders (28) symmetrically arranged at both ends, and the inner side of the support frame (6) has a groove (29) that matches the sliders (28).

6. The tooling for rapid lifting of the elastic felt inside a full-containment tank according to claim 1, characterized in that: The length of the second roller (4) is greater than the width of the elastic felt.

7. The tooling for rapid lifting of the elastic felt inside a full-containment tank according to claim 1, characterized in that: The bottom of the outer tank (7) is provided with a support platform.

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