Storage tank wall construction assembly line

Abstract

The utility model relates to the technical field of storage tank construction, in particular to a storage tank wall construction assembly line, by designing a material platform, a machining platform, a coaming mechanism and a tank wall sliding mechanism, factory tank wall prefabrication is changed into field machining, the hoisting procedures are remarkably reduced, and the transportation process is simplified; and a set of efficient, simplified and reliable construction system is formed.

Description

Technical Field

[0001] This application relates to the field of storage tank construction technology, specifically to a storage tank wall construction assembly line. Background Technology

[0002] Storage tanks are critical infrastructure in fields such as petrochemicals and energy storage. Traditional construction methods for vertical storage tanks are divided into the upright installation method and the inverted installation method. Both methods require the preparation of a large number of curved steel plates, which need to be transported to the construction site in sections. At the construction site, there are also a lot of hoisting operations.

[0003] Traditional vertical storage tank construction methods have developed numerous limitations: large curved steel plates require oversized transportation, which drastically increases costs and the risk of deformation; the difficulty of oversized transportation and hoisting in densely populated urban areas has increased significantly; even ordinary curved steel plates still require on-site assembly in sections, resulting in low construction efficiency; the low integrity between the sections of the assembled tank wall may lead to insufficient roundness and increased maintenance costs. Utility Model Content

[0004] This application provides a tank wall construction production line that improves the traditional vertical tank construction to a model of on-site preparation and overall assembly, thereby overcoming the limitations of vertical tank construction described in the background art.

[0005] The technical solution of this application is as follows:

[0006] In a first aspect, this application provides a tank wall construction assembly line, comprising:

[0007] The processing platform includes a lifting device and a plate rolling machine fixed to the lifting device. The processing platform is used to process tank wall steel plates into tank wall units at the pre-installation position of the tank wall.

[0008] The material platform includes a lower first lifting platform and an upper second lifting platform. The second lifting platform is driven by a lead screw and is equipped with a fixing device for uprighting the tank wall steel plate and a propulsion device for driving the tank wall steel plate to move. The material platform is used to supply the tank wall steel plate to the processing platform.

[0009] The enclosure mechanism includes a slide rail that surrounds the tank wall inside the storage tank and a tractor mounted on the slide rail. The tractor is provided with a traction rod that is perpendicular to the plane of the slide rail. The traction rod extends outward from the storage tank with a traction end. The traction end has a traction head and the traction head extends from the outside of the storage tank to the outer surface of the first tank wall unit that has been processed in each layer of the tank wall.

[0010] The tank wall sliding mechanism includes a trolley and a pulley. The trolley is detachably connected to the bottom of the first layer tank wall unit, and the pulley is welded to the top of each layer tank wall unit and is removed after the first and last tank wall units of the upper layer are welded together.

[0011] Furthermore, the fixing device includes several sets of limiting piles disposed on both sides of the inner and outer surfaces of the tank wall steel plate, with a limiting block between each set of limiting piles; the propulsion device includes several electric hoists disposed between the limiting piles.

[0012] Furthermore, the upper edge of the tank wall unit is provided with a plurality of limiting terminals that allow the upper tank wall unit to pass through.

[0013] The construction method for the assembly line adopts the direct assembly method, which includes the following steps:

[0014] Step 1: Install slide rails on the inner side of the pre-installation position on the tank wall, adjust the lifting device to align the discharge port of the plate rolling machine with the pre-installation position of the first layer of tank wall, and adjust the first and second lifting platforms of the material platform to align the tank wall steel plate in the fixing device with the feed port of the plate rolling machine.

[0015] Step 2: Start the plate rolling machine and the pushing device to feed the front end of the first tank wall steel plate of the first layer into the feed inlet. When the front end of the tank wall steel plate is exposed from the discharge outlet and the rear end of the tank wall steel plate has not yet entered the feed inlet, turn off the plate rolling machine and the pushing device.

[0016] Step 3: Install a pulley at the bottom of the first tank wall steel plate, and weld the front end of the first tank wall steel plate to the traction head. Also, weld the second tank wall steel plate to the rear end of the first tank wall steel plate. At the same time, weld a pulley and a limit terminal to the upper edge of the first tank wall steel plate.

[0017] Step 4: Restart the plate rolling machine and the propulsion device. When the rear end of the first tank wall steel plate is exposed at the discharge port, the first tank wall steel plate is processed into the first tank wall unit. Adjust the forward movement speed of the tractor according to the processing speed of the plate rolling machine.

[0018] Step 5: When the front end of the second tank wall steel plate is exposed from the discharge port and the rear end of the tank wall steel plate has not yet entered the feed port, shut down the plate rolling machine and the propulsion device; weld the third tank wall steel plate to the rear end of the second tank wall steel plate; restart the plate rolling machine and the propulsion device, and adjust the forward movement speed of the tractor according to the processing speed of the plate rolling machine.

[0019] Step Six: Process the remaining tank wall units of the first layer in sequence according to Step Five. After the last tank wall unit of the first layer is processed, weld the front end of the first tank wall unit to the rear end of the last tank wall unit, and then weld the bottom of the first layer tank wall unit to the bottom plate of the storage tank.

[0020] Step 7: Adjust the lifting device to align the discharge port of the plate rolling machine with the pre-installed position of the second layer of tank wall. Adjust the first and second lifting platforms to align the tank wall steel plate in the fixing device with the feed port of the plate rolling machine. Start the plate rolling machine and the pushing device to feed the front end of the first tank wall steel plate of the second layer into the feed port. When the front end of the tank wall steel plate is exposed from the discharge port and the rear end of the tank wall steel plate has not yet entered the feed port, turn off the plate rolling machine and the pushing device.

[0021] Step 8: Weld the front end of the first tank wall steel plate of the second layer to the traction head, and weld the second tank wall steel plate to the rear end of the first tank wall steel plate of the second layer. At the same time, weld pulleys and limit terminals to the upper edge of the first tank wall steel plate of the second layer. Restart the plate rolling machine and the propulsion device, and adjust the forward movement speed of the traction vehicle according to the processing speed of the plate rolling machine. When the front end of the second tank wall steel plate of the second layer is exposed from the discharge port and the rear end of the tank wall steel plate has not yet entered the feed port, shut down the plate rolling machine and the propulsion device. Weld the third tank wall steel plate to the rear end of the second tank wall steel plate of the second layer, and weld pulleys and limit terminals to the upper edge of the second tank wall steel plate of the second layer. Restart the plate rolling machine and the propulsion device, and adjust the forward movement speed of the traction vehicle according to the processing speed of the plate rolling machine.

[0022] Step 9: Process the remaining tank wall units of the second layer in sequence according to Step 8. After the last tank wall unit of the second layer is processed, cut off the connection between the first tank wall unit of the second layer and the traction head. Manually pull the front end of the first tank wall unit of the second layer and weld it to the rear end of the last tank wall unit of the second layer through the guide chain. Then cut off the connection between the limiting terminal and the pulley at the top of the first tank wall unit. Finally, weld the first tank wall unit and the second tank wall unit together.

[0023] Step 10: Construct the remaining tank wall layers in sequence according to Steps 7 to 9.

[0024] Furthermore, in step one, the slide rail includes an inner rail and an outer rail, and the height of the inner rail is higher than the height of the outer rail.

[0025] Furthermore, in step three, the traction head extends horizontally and is welded to the front end of the outer surface of the first tank wall unit.

[0026] Furthermore, in step nine, all the pulleys of the tank wall units on both sides of the tank wall unit are cut in a clockwise or counterclockwise direction at intervals of one tank wall unit, and then the pulleys of each tank wall unit are cut in a clockwise or counterclockwise direction in sequence.

[0027] Furthermore, in step six, each tank wall layer is divided into two groups, and each group of tank walls is constructed in sequence according to steps one through five. After the construction of the two groups of tank walls is completed, the beginning and end are welded together.

[0028] Due to the adoption of the above technical solution, the beneficial effects of this application are as follows:

[0029] 1. The tank construction assembly line provided in this application simplifies the transportation process of tank wall units, transforming factory prefabrication into on-site processing. It is particularly suitable for large-scale tank construction projects, enabling on-site construction. Besides avoiding the risk of deformation during transportation, on-site construction avoids steel deformation caused by environmental changes: Slight differences in steel plate properties occur with variations in temperature and humidity. When the steel plate size is too large and the quantity is large, the cumulative error will amplify defects, potentially leading to problems such as insufficient roundness. On-site construction avoids deformation errors caused by differences in processing and installation environments.

[0030] 2. The tank construction line provided in this application fully considers the characteristics of the construction process. For example, during tank construction, the space between the first layer of tank wall and the tank bottom plate is relatively large. This application achieves tank wall movement by installing pulleys. After the first layer of tank wall is constructed, pulleys are installed on the assembled tank wall to form a transmission structure, enabling tank wall movement in narrow gaps. The pulleys are based on the lower layer of tank wall, and the traction mechanism ensures the smooth movement of the tank wall unit. Furthermore, the construction line of this application effectively prevents tank wall unit overturning. During tank wall unit processing, inward forces are generated, and the bottom contact surface of the tank wall unit is small, posing a risk of inward overturning. The traction end and traction head in this application use a "first outward, then inward" method, allowing the traction head to pull the tank wall unit on its outer surface, which can offset some of the inward overturning force and facilitates the traction of the tank wall during construction.

[0031] 3. The construction method of the construction line provided in this application changes the traditional "plate fabrication first, then connection" installation mode, realizing the synchronization of plate fabrication and connection. Specifically, this application performs welding connection on the rear end of the tank wall steel plate immediately after the discharge port is exposed at the front end. Therefore, the weld becomes part of the tank wall steel plate and is processed into a tank wall unit. The weld formed in this way is also subjected to a rolling process, which helps to achieve roundness and avoids the stress accumulation in the weld caused by "plate fabrication first, then connection", which affects the curvature of the tank wall unit.

[0032] 4. The construction method of the construction line provided in this application makes full use of the forward-moving effect of the plate rolling machine. During the processing of the tank wall steel plate, the plate rolling machine will advance the tank wall unit. In the early stage of processing, the plate rolling machine advances the tank wall unit. After the tank wall unit reaches the pulley, the pulley can reduce the resistance of the plate rolling machine's forward movement after bearing the load. At the same time, it cooperates with the tractor to advance the continuous tank wall units forward.

[0033] 5. The tank wall steel plate processing method in this application is vertical processing, while traditional tank wall steel plate processing is horizontal processing. Vertical processing directly processes the tank wall into the working state, which can reduce the deformation of heavy tank wall steel plates and improve geometric accuracy. Vertical processing of steel plates changes the welding method. The bottom-up welding method is conducive to high-altitude operations, improves welding comfort, and thus improves welding quality. Attached Figure Description

[0034] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0035] Figure 1 This is a schematic diagram of the construction production line in this application;

[0036] Figure 2 This is a top view of the material platform described in this application;

[0037] Figure 3 This is a frontal view of the material platform described in this application;

[0038] Figure 4 This is a schematic diagram of the welding of the limiting terminal described in this application;

[0039] Figure 5 This is a schematic diagram of the welding of the pulley structure described in this application;

[0040] Figure 6 This is a top view of the enclosure mechanism described in this application;

[0041] Figure 7 This is a schematic diagram of the limiting structure of the first layer of tank wall unit.

[0042] In the attached diagram:

[0043] 1. Material platform; 1-1. First lifting platform; 1-2. Second lifting platform; 1-3. Fixing device; 1-3-1. Limiting stake; 1-3-2. Limiting block; 1-4. Propulsion device; 2. Processing platform; 3. Enclosure mechanism; 3-1. Slide rail; 3-2. Traction vehicle; 3-3. Traction rod; 3-4. Traction end; 3-5. Traction head; 4. Pulley; 5. Limiting terminal; 6. Tank wall unit. Detailed Implementation

[0044] Based on the background technology described, for traditional storage tank construction scenarios, please refer to the appendix. Figure 1 ~Appendix Figure 6 This application provides a tank wall construction assembly line, comprising:

[0045] The processing platform 2 includes a lifting device and a plate rolling machine fixed to the lifting device. The processing platform 2 is used to process the tank wall steel plate into tank wall unit 6 at the pre-installation position of the tank wall.

[0046] The material platform 1 includes a lower first lifting platform 1-1 and an upper second lifting platform 1-2. The second lifting platform 1-2 is driven by a lead screw. The second lifting platform 1-2 is equipped with a fixing device 1-3 for uprighting the tank wall steel plate and a propulsion device 1-4 for driving the tank wall steel plate to move. The material platform 1 is used to supply the tank wall steel plate to the processing platform 2.

[0047] The enclosure mechanism 3 includes a slide rail 3-1 that surrounds the tank wall inside the tank and a tractor 3-2 disposed on the slide rail 3-1. The tractor 3-2 is provided with a traction rod 3-3 that is perpendicular to the plane of the slide rail 3-1. The traction rod 3-3 extends outward from the tank to a traction end 3-4. The traction end 3-4 has a traction head 3-5 and the traction head 3-5 extends from the outside of the tank to the outer surface of the first tank wall unit 6 that has been processed in each layer of the tank wall.

[0048] The tank wall sliding mechanism includes a trolley and a pulley 4. The trolley is detachably connected to the bottom of the first layer tank wall unit 6. The pulley 4 is welded to the top of each layer tank wall unit 6 and is removed after welding the first and last tank wall units 6 of the upper layer.

[0049] In practical implementation, the lifting device of processing platform 2 can be a hydraulic lift, such as a guide rail hydraulic lift, which has a larger lifting load and a higher lifting height. Since the processing is on-site, a high-precision plate rolling machine, such as a two-way CNC four-roll plate rolling machine, should be selected. It should be noted that the plate rolling machine needs to be placed vertically so that the tank wall steel plates processed at the discharge port can be used directly. In practical implementation, a counterweight needs to be added to the bottom of the lifting device to improve the stability of processing platform 2. In addition, the lifting device needs to be fixed with tension ropes and ground anchors; if necessary, a foundation needs to be excavated for fixation.

[0050] Material platform 1 has a double-layer lifting structure. The lower first lifting platform 1-1 is used for coarse height adjustment, while the upper second lifting platform 1-2 is used for more precise height adjustment. The second lifting platform 1-2 requires strict control of the feeding height; therefore, it is driven by a lead screw. The second lifting platform 1-2 is equipped with a fixing device 1-3 and a driving device. The fixing device 1-3 includes several limiting posts 1-3-1 set on both sides of the inner and outer surfaces of the tank wall steel plate. The pushing device 1-4 includes several electric hoists set between the limiting posts 1-3-1. In specific implementation, the fixing device 1-3 keeps the tank wall steel plate vertical through the limiting posts 1-3-1 and the limiting blocks 1-3-2. The pushing device 1-4 is located at the bottom of the fixing device 1-3, between the limiting posts 1-3-1. The electric hoists drive the tank wall steel plate into the plate rolling machine by rotation.

[0051] The enclosure mechanism 3 includes a slide rail 3-1 and a tractor 3-2. The tractor 3-2 has a power mechanism and adjustable speed. The specific structure of the tractor 3-2 can be achieved using existing technology. The traction rod 3-3 is used to move the tank wall unit 6. The traction rod 3-3 extends upwards, and the specific extension height is determined according to the design height of the storage tank. The traction rod 3-3 extends a traction end 3-4 for each layer of tank wall unit 6. For example, when five layers of tank wall unit 6 need to be assembled, there are five traction ends 3-4, and correspondingly five traction heads 3-5. After the construction of one layer of tank wall is completed, the traction heads 3-5 of that layer need to be cut off. It should be noted that in this application, the extension of the traction rod 3-3 to the outside of the storage tank means that the extended end of the traction rod 3-3 is located outside the tank body, and the extension of the traction head 3-5 to the outer surface of the tank wall unit 6 means that the extended end of the traction rod 3-3 extends to the outer surface of the tank wall unit 6. That is, the traction rod 3-3 and the traction end 3-4 achieve the effect of pulling the tank wall unit 6 from the outside.

[0052] The tank wall sliding mechanism is a temporary structure and needs to be disassembled after the tank wall unit 6 is assembled. The trolley is a small carriage with pulleys 4, which can be a flat carriage or a clamping structure with rollers.

[0053] See appendix Figure 4 The top of the tank wall unit 6 has a welding limiting terminal 5. The limiting terminal 5 is connected to the lower tank wall unit 6 through the welding parts below, and is welded in pairs to the front and rear sides of the tank wall unit 6. The limiting terminal 5 can ensure the alignment of the tank wall unit 6, facilitating the final welding process. Before the tank wall unit 6 is rounded, the risk of the steel plate slipping is higher than after it is rounded. Setting the limiting terminal 5 can prevent the tank wall unit 6 from tipping over during construction. In addition, the limiting terminal 5 can limit the position of the tank wall unit 6, which helps in the assembly and welding of the upper and lower tank wall units 6.

[0054] See appendix Figure 7In order to prevent deviations during the welding of the first tank wall unit 6, a triangular iron can be welded to the bottom of the tank as a limiting terminal 5 to prevent positional deviations during the welding of the first tank wall unit 6.

[0055] It should be noted that this application does not limit the number of pulleys 4, trolleys, and limit terminals 5. Their specific numbers can be flexibly set according to the dimensions of the tank wall unit 6. The number of limit terminals 5 is set according to the length of the tank wall steel plate, such as one set every meter. See appendix. Figure 5 The welding connection method of pulley 4 is similar to that of limit terminal 5. It is welded to the lower tank wall unit 6 through a fastener. The cross-section of the fastener is radially L-shaped. When removing pulley 4 and limit terminal 5, wedge-shaped wood can be inserted between the two layers of tank wall steel plates before removal, which helps to reduce the impact on the bottom of the tank wall steel plates.

[0056] The tank construction assembly line provided in this application simplifies the transportation process of tank wall unit 6, transforming factory prefabrication into on-site processing. It is particularly suitable for large-scale tank construction projects, enabling on-site construction. Besides avoiding the risk of deformation during transportation, on-site construction also avoids steel deformation caused by environmental changes: Slight differences in steel plate properties occur with variations in temperature and humidity. When the steel plate size is too large and the quantity is large, the cumulative error can amplify defects, potentially leading to problems such as insufficient roundness. On-site construction avoids deformation errors caused by differences in processing and installation environments.

[0057] The tank construction line provided in this application fully considers the characteristics of the construction process. For example, during tank construction, the space between the first layer of tank wall and the tank bottom plate is relatively large. This application uses pulleys to move the tank wall. After the first layer of tank wall is completed, pulleys 4 are installed on the assembled tank wall to form a transmission structure, enabling the tank wall to move in narrow gaps. The pulleys 4 are based on the lower layer of tank wall and work with the traction mechanism to move the tank wall unit 6 smoothly. Furthermore, the construction line of this application can effectively prevent the tank wall unit 6 from tipping over. During the processing of the tank wall unit 6, an inward force is generated. The bottom contact surface of the tank wall unit 6 is small, posing a risk of inward tipping. The traction end 3-4 and traction head 3-5 in this application use a "first outward, then inward" method, allowing the traction head 3-5 to pull the tank wall unit 6 on its outer surface, thus offsetting some of the inward tipping force.

[0058] Based on the aforementioned construction process, this application proposes a method for constructing the walls of a storage tank. This method employs a forward assembly method, which involves first laying the base plate and then assembling each layer of wall panels. The method specifically includes the following steps:

[0059] Step 1: Install slide rail 3-1 on the inner side of the pre-installation position on the tank wall, adjust the lifting device of the processing platform 2 so that the discharge port of the plate rolling machine is aligned with the pre-installation position of the first layer of tank wall, and adjust the first lifting platform 1-1 and the second lifting platform 1-2 of the material platform 1 so that the tank wall steel plate in the fixing device 1-3 is aligned with the feed port of the plate rolling machine.

[0060] Step 2: Start the plate rolling machine and the propulsion device 1-4 to feed the front end of the first tank wall steel plate of the first layer into the feed inlet. When the front end of the tank wall steel plate is exposed from the discharge outlet and the rear end of the tank wall steel plate has not yet entered the feed inlet, turn off the plate rolling machine and the propulsion device 1-4.

[0061] Step 3: Install a pulley at the bottom of the first tank wall steel plate, and weld the front end of the first tank wall steel plate to the traction head 3-5. Weld the second tank wall steel plate to the rear end of the first tank wall steel plate. At the same time, weld the pulley 4 and the limit terminal 5 to the upper edge of the first tank wall steel plate.

[0062] Step 4: Restart the plate rolling machine and the propulsion device 1-4. When the rear end of the first tank wall steel plate is exposed at the discharge port, the first tank wall steel plate is processed into the first tank wall unit 6. Adjust the forward movement speed of the tractor 3-2 according to the processing speed of the plate rolling machine.

[0063] Step 5: When the front end of the second tank wall steel plate is exposed from the discharge port and the rear end of the tank wall steel plate has not yet entered the feed port, shut down the plate rolling machine and the propulsion device 1-4; weld the third tank wall steel plate to the rear end of the second tank wall steel plate; restart the plate rolling machine and the propulsion device 1-4, and adjust the forward movement speed of the tractor 3-2 according to the processing speed of the plate rolling machine.

[0064] Step Six: Following Step Five, process the remaining tank wall units 6 of the first layer sequentially. After the last tank wall unit 6 of the first layer is processed, weld the front end of the first tank wall unit 6 to the rear end of the last tank wall unit 6, and then weld the bottom of the first layer tank wall unit 6 to the tank bottom plate. After the last tank wall unit 6 is processed, cut the traction head 3-5 to avoid obstructing the weld seam, and then manually pull the first tank wall unit 6 using a chain hoist to achieve alignment. The chain hoist, also known as a chain chain pulley, is fixed to the tank wall unit 6; rotating the hand chain wheel will move the tank wall unit 6.

[0065] Step 7: Adjust the lifting device to align the discharge port of the plate rolling machine with the pre-installed position of the second layer of tank wall. Adjust the first lifting platform 1-1 and the second lifting platform 1-2 to align the tank wall steel plate in the fixing device 1-3 with the feed port of the plate rolling machine. Start the plate rolling machine and the pushing device 1-4 to feed the front end of the first tank wall steel plate of the second layer into the feed port. When the front end of the tank wall steel plate is exposed from the discharge port and the rear end of the tank wall steel plate has not yet entered the feed port, turn off the plate rolling machine and the pushing device 1-4.

[0066] Step 8: Weld the front end of the first tank wall steel plate of the second layer to the traction head 3-5, and weld the second tank wall steel plate to the rear end of the first tank wall steel plate of the second layer. At the same time, weld the pulley 4 and the limit terminal 5 to the upper edge of the first tank wall steel plate of the second layer. Restart the plate rolling machine and the propulsion device 1-4, and adjust the forward movement speed of the traction vehicle 3-2 according to the processing speed of the plate rolling machine. When the front end of the second tank wall steel plate of the second layer is exposed from the discharge port and the rear end of the tank wall steel plate has not yet entered the feed port, turn off the plate rolling machine and the propulsion device 1-4. Weld the third tank wall steel plate to the rear end of the second tank wall steel plate of the second layer, and weld the pulley 4 and the limit terminal 5 to the upper edge of the second tank wall steel plate of the second layer. Restart the plate rolling machine and the propulsion device 1-4, and adjust the forward movement speed of the traction vehicle 3-2 according to the processing speed of the plate rolling machine.

[0067] Step 9: Process the remaining tank wall units 6 of the second layer in sequence according to Step 8. After the last tank wall unit 6 of the second layer is processed, cut off the connection between the first tank wall unit 6 of the second layer and the traction head 3-5. Manually pull the front end of the first tank wall unit 6 with the rear end of the last tank wall unit 6 of the second layer using the guide chain and weld it. Cut off the connection between the limiting terminal 5 and the pulley 4 at the top of the first tank wall unit 6. Then, weld the first tank wall unit 6 and the second tank wall unit 6 together.

[0068] Step 10: Construct the remaining tank wall layers in sequence according to Steps 7 to 9.

[0069] In a preferred embodiment of the above method, in step one, the slide rail 3-1 includes an inner rail and an outer rail, and the height of the inner rail is higher than the height of the outer rail. The height difference between the inner and outer slide rails 3-1 causes the plane where the tractor 3-2 is located to tilt. After the traction rod 3-3 is perpendicular to the plane, it can generate a force to resist the inward tilting of the tank wall unit 6, thereby improving safety.

[0070] In a specific embodiment of the above implementation method, in step three, the traction head 3-5 extends horizontally and is welded to the front end of the outer surface of the first tank wall unit 6, and the traction head 3-5 and the traction end 3-4 form an acute angle outside the storage tank.

[0071] In a preferred embodiment of the above implementation, in step ten, all pulleys 4 of the tank wall units 6 on both sides of the tank wall unit 6 are cut at intervals of one tank wall unit 6 in a clockwise or counterclockwise direction, and then the pulleys 4 of each tank wall unit 6 are cut sequentially in a clockwise or counterclockwise direction. The same cutting principle is also used to remove the limiting terminal 5.

[0072] In a preferred embodiment of the above implementation, in step six, the entire tank wall is divided into two equal groups. Each group of tank walls is constructed sequentially according to steps one through five. After each group of tank walls is constructed, the beginning and end are welded together. This method avoids excessive overall load on the tank wall unit 6 and excessive load on the plate rolling machine. When constructing in two groups, one semicircle is constructed first clockwise or counterclockwise, then the other semicircle is constructed in the reverse direction, and then the beginning and end are connected. When the tank diameter is long, multiple groups of tank walls can also be set.

[0073] In the specific implementation of this application, a combination structure of several tractor 3-2, traction rod 3-3, and traction end 3-4 can be designed to help the first tractor 3-2 to traction the tank wall unit 6. The traction end 3-4 added later does not have a traction head 3-5.

[0074] The construction method provided in this application changes the traditional "plate fabrication first, then connection" installation mode, achieving simultaneous plate fabrication and connection. Specifically, this application performs welding connection on the rear end of the tank wall steel plate immediately after the discharge port is exposed at the front end. Therefore, the weld becomes part of the tank wall steel plate and is processed into the tank wall unit 6. The weld formed in this way is also subjected to a rolling process, which helps to achieve roundness and avoids the stress accumulation in the weld caused by "plate fabrication first, then connection," which would affect the curvature of the tank wall unit 6.

[0075] The construction method in this application makes full use of the forward-moving effect of the plate rolling machine. During the processing of the tank wall steel plate, the plate rolling machine will advance the tank wall unit 6. After the tank wall unit 6 reaches the pulley 4, the pulley 4 can reduce the resistance of the plate rolling machine's forward movement after bearing the load. At the same time, it works in conjunction with the tractor 3-2 to advance the continuous tank wall units 6 forward.

[0076] The tank wall steel plate processing method described in this application is vertical processing, while traditional tank wall steel plate processing is a flat-laying method. Vertical processing directly processes the tank wall into a working state, which can reduce the deformation of heavy tank wall steel plates and improve geometric accuracy. Vertical processing of steel plates changes the welding method; the bottom-up welding method facilitates high-altitude operations, improves welding comfort, and thus improves welding quality. Any aspects not mentioned in this application can be achieved by using or referencing existing technologies.

[0077] Compared to traditional hoisting and installation methods, this application optimizes the transportation and prefabrication processes. Traditional methods require the prefabrication of large curved steel plates in a factory, which leads to high costs and deformation risks during transport to the site, especially in densely populated urban areas where transportation and hoisting become significantly more difficult. The method in this application utilizes an on-site processing line to directly fabricate the steel plates into tank wall units 6 at the pre-installation location on the storage tank. This avoids oversized transport, eliminates the risk of deformation during transportation, and reduces reliance on prefabrication plants, significantly lowering logistics costs.

[0078] This application improves construction efficiency. Traditional methods require segmented transport of steel plates, necessitating hoisting and assembly per piece, resulting in cumbersome procedures, long construction cycles, and frequent on-site hoisting operations. This application's method, through the coordinated operation of the material platform 1, the plate rolling machine, and the enclosure mechanism 3, achieves continuous processing and synchronous welding of the tank wall unit 6 (plate fabrication and connection are simultaneous), significantly shortening the construction cycle. For example, the plate rolling machine simultaneously advances the tank wall unit 6, with the traction mechanism cooperating in its movement, reducing downtime. This application also achieves structural integrity and precision control. Traditional methods of segmented assembly easily lead to insufficient roundness of the tank wall, and accumulated stress in the welds may affect curvature, resulting in high maintenance costs later. In this application's method, the tank wall unit 6 is formed by a single roll forming process using the plate rolling machine, with the welds processed and subjected to roll forming simultaneously, improving overall roundness; the limiting terminal 5 and pulley 4 assist in positioning, ensuring precise alignment and welding of the upper and lower tank walls, enhancing structural integrity. Furthermore, the safety and construction risks of this application's technical solution are reduced.

[0079] Traditional methods rely on high-altitude hoisting operations, which pose safety risks such as steel plate slippage and overturning, and the hoisting equipment is complex to operate. The method in this application replaces hoisting with a system of slide rails 3-1, trolleys, and pulleys 4. The traction mechanism pulls the tank wall unit 6 from the outside, counteracting the inward overturning force; the first-level trolley and the upper-level pulleys 4 form a stable transmission structure, reducing the frequency of high-altitude operations and significantly improving construction safety. Regarding environmental protection, this application achieves environmental adaptability and quality control. Traditional methods may cause changes in steel properties due to temperature and humidity differences in different environments (factory and site), and the cumulative errors affect accuracy. The method in this application uses on-site vertical processing to directly simulate the working state of the storage tank, reducing steel plate deformation; the vertical placement of the plate rolling machine combined with real-time adjustment of the lifting platform ensures geometric accuracy and adapts to complex construction environments. Regarding cost, the technical solution in this application is cost-effective and flexible. Traditional methods require a large investment in hoisting equipment and transportation resources, resulting in high overall costs and difficulty in adapting to the needs of large or irregularly shaped storage tanks. The method described in this application reduces reliance on hoisting equipment. The material platform 1 and processing platform 2 are adjustable in height and position to accommodate different tank sizes. Group construction (e.g., processing in two groups) reduces the load on the plate rolling machine, flexibly meeting engineering needs and resulting in lower overall costs. Furthermore, the technical solution of this application offers advantages in post-construction maintenance. Traditional methods involving modular assembly can easily lead to localized stress concentrations, which may cause weld cracking or roundness deviations over long-term use, increasing maintenance frequency. The method of this application, with its more integrated tank wall structure combined with high-precision welds, reduces stress accumulation, extends the service life of the storage tank, and lowers maintenance costs.

[0080] Traditional methods require steel plates to be cut and prefabricated, resulting in a large waste of steel. The method of this application can effectively reduce the waste.

[0081] In summary, this application integrates the discrete processes of prefabrication, transportation, hoisting, and assembly in traditional storage tank construction into a continuous on-site processing flow through innovative assembly line design and construction methods. It achieves significant breakthroughs in efficiency, cost, safety, and quality, and is particularly suitable for large-scale storage tank projects and construction scenarios in densely populated urban areas, with broad industrial application value.

[0082] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A tank wall construction assembly line, characterized in that, include: The processing platform includes a lifting device and a plate rolling machine fixed to the lifting device. The processing platform is used to process tank wall steel plates into tank wall units at the pre-installation position of the tank wall. The material platform includes a lower first lifting platform and an upper second lifting platform. The second lifting platform is driven by a lead screw and is equipped with a fixing device for uprighting the tank wall steel plate and a propulsion device for driving the tank wall steel plate to move. The material platform is used to supply the tank wall steel plate to the processing platform. The enclosure mechanism includes a slide rail that surrounds the tank wall inside the storage tank and a tractor mounted on the slide rail. The tractor is provided with a traction rod that is perpendicular to the plane of the slide rail. The traction rod extends outward from the storage tank with a traction end. The traction end has a traction head and the traction head extends from the outside of the storage tank to the outer surface of the first tank wall unit that has been processed in each layer of the tank wall. The tank wall sliding mechanism includes a trolley and a pulley. The trolley is detachably connected to the bottom of the first layer tank wall unit, and the pulley is welded to the top of each layer tank wall unit and is removed after the first and last tank wall units of the upper layer are welded together.

2. The tank wall construction assembly line according to claim 1, characterized in that, The fixing device includes several sets of limiting piles disposed on both sides of the inner and outer surfaces of the tank wall steel plate, with a limiting block between each set of limiting piles; the propulsion device includes several electric hoists disposed between the limiting piles.

3. The tank wall construction assembly line according to claim 2, characterized in that, The upper edge of the tank wall unit is provided with several limiting terminals that allow the upper tank wall unit to pass through.

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