Guide-plate-free air pressure jacking inverted tank construction method

Abstract

The invention relates to the technical field of industrial storage tank installation, in particular to a construction method of a guide-plate-free air pressure jacking inverted tank, which mainly comprises two stages: the first stage is splicing of a tank bottom plate, splicing of a top layer with a wall plate, splicing of a tank top and installation of a fan and an air pipe; and in the second stage, the next wall plate is spliced, a chain block for controlling the jacking stroke is installed, the tank body is jacked through air pressure, the tank body is fixedly welded to the adjacent wall plate after being jacked in place, and construction of the next wall plate is executed. The working procedures of manufacturing, mounting and dismounting the inner guide plate are omitted, a large amount of manpower, material and machine cost is saved, the expansion ring is additionally arranged to fix the movable sealing piece, the auxiliary function is achieved for alignment of the wall plate of the tank body, and the working efficiency and construction quality of pneumatic jacking of the circular storage tank are improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial storage tank installation, and in particular to a construction method for a guide plate-free gas pressure jacking inverted tank. Background Art

[0002] In the process of manufacturing and installing industrial storage tanks, the inverted installation construction method using air pressure jacking is more common. In many cases, in order to obtain good control and posture adjustment in the guidance, the jacking part of the tank body is generally guided by a guide plate, guide rail or inner tube, which needs to be manufactured, installed and removed, requiring a large amount of manpower and machine costs; when the tank body is jacked, the seal between the rising part and the stationary part is mostly sealed with a rubber plate, which needs to be set before the jacking operation and removed before welding after jacking. It is generally fixed with flat steel and bolts, which is not easy to disassemble and assemble, and the disassembly and assembly are relatively difficult. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a construction method for a guide-free air pressure jacking inverted tank, so as to achieve the technical effect of eliminating the need for guide plate setting and having a simple sealing structure.

[0004] To achieve this technical purpose, the present invention adopts the following scheme: A construction method for a non-guide plate pneumatic jacking inverted tank is carried out according to the following steps: S1. Complete the assembly and welding of the tank bottom plate on the tank body foundation; S2. Set up a fan and connect the air duct to the tank bottom plate; S3, setting up the top layer with siding, and then assembling the tank top on the top layer with siding; S4. On the outside of the top layer of wall panels, closely surround the next layer of wall panels, leaving the last vertical interface unwelded, and forming an overlap between the wall panels on both sides of the interface, with an overlap width of 100-200mm, and symmetrically welding two groups of side ear panels on both sides of the overlap interface, respectively, and installing a hand chain hoist between the two side ear panels of each group, and tightening and fixing the wall panels on both sides of the interface by the hand chain hoist; S5. Weld several protective baffles at intervals on the outside of the next band of wall panels, and set jacking screws on the protective baffles for supporting and guiding the wall panels during jacking; S6. Upper ear plates are welded at intervals on the top layer with wainscot plates, and lower ear plates are welded on the tank bottom plate. The upper ear plates and the lower ear plates are arranged one by one, and a fall chain is arranged between the upper ear plates and the lower ear plates; S7, a dynamic seal is installed between the lower belt wall plate and the top belt wall plate, and the upper end of the dynamic seal is compressed by an expansion ring; S8, start the fan, use the fan gate to adjust the air supply volume and wind pressure, the tank body starts to rise under the action of wind pressure, when the expansion ring reaches a predetermined distance from the tank bottom, static seals are respectively set between the inner side of the next band wall plate and the tank bottom, and at the vertical seam of the next band wall plate interface; at the same time, the fall chain is loosened as the tank body rises, and the lifting stroke and verticality of the tank body are controlled until the tank body is lifted into place; S9. Use a hand chain hoist to tighten both sides of the interface of the next band wall panel, so that the two side wall panels are completely tightened and completely fit the top band wall panel, and the spot welding and fixing of the overlap interface between the top band wall panel and the next band wall panel are completed; S10, cutting off the overlapping parts on both sides of the interface of the next wall panel, completing the interface alignment and spot welding, then fully welding, and removing the protective baffle; S11, remove the dynamic seal, and then completely weld the overlapping interface between the top layer siding plate and the next layer siding plate; S12, repeating steps S4 to S11 until the jacking and inverting construction of the entire tank body is completed.

[0005] Compared with the prior art, the present invention has the following beneficial effects: The present invention eliminates the need for manufacturing, installing and removing the inner guide plate, thereby saving a large amount of labor, material and machine costs; the expansion ring used to fix the dynamic seal not only achieves good sealing performance, but also has a good roundness correction function, and has an auxiliary function for the docking of the tank wall plate, thereby improving the work efficiency and construction quality of the gas pressure jacking of the circular storage tank, shortening the operation time, and reducing the construction difficulty.

[0006] Further, the preferred embodiment of the present invention is: The expansion ring in step S7 is divided into 4 sections, each section covers 1 / 4 of the circumference of the inner wall of the tank body. A threaded sleeve is provided at each interface of the expansion ring, and then two adjacent threaded sleeves are connected by a lead screw.

[0007] The thread directions of the two threaded sleeves connected with the same lead screw are opposite.

[0008] In step S5, a protective baffle is welded on the outer side of the next wall panel at an angle of 60 degrees. A threaded hole is provided on the upper part of the protective baffle, and a top screw is connected to the thread in the threaded hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A magnified view of part B; Figure 3 This is the installation diagram of the expansion ring; Figure 4 for Figure 3 AA section view; Figure 5It is a structural schematic diagram of a threaded sleeve; Figure 6 It is the structural diagram of the lead screw; Figure 7 It is a schematic diagram of tightening the vertical interface of the next band of wall panels; The markings in the figure are: 1. fan; 2. tank bottom plate; 3. lower ear plate; 4. fall chain; 5. upper ear plate; 6. tank top; 7. top layer with wall plate; 8. lower layer with wall plate; 9. expansion ring; 9-1. arc structure; 9-2. threaded sleeve; 9-3. lead screw; 9-3-1. through hole; 10. dynamic seal; 11. static seal; 12. hose; 13. air duct; 14. tank foundation; 15. hand hoist; 16. side ear plate; 17. protective baffle; 18. top screw; 19. vertical interface. DETAILED DESCRIPTION

[0010] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0011] A construction method for a non-guide plate pneumatic jacking inverted tank mainly consists of two stages. The first stage is the assembly of the tank bottom plate 2, the top layer wall plate 7, the tank top 6, and the installation of the fan 1 and the air duct 13; the second stage is the assembly of the next wall plate 8, the installation of the hand chain hoist 15 for controlling the jacking stroke, the pneumatic jacking of the tank body, the fixed welding between the adjacent wall plates after the jacking is in place, and the construction of the next wall plate. The specific contents of the above two stages are as follows: S1. Lay the tank bottom plate 2 on the tank body foundation 14, and splice and weld the tank bottom plate 2.

[0012] S2. An air inlet is provided on the tank bottom plate 2, and the air inlet is connected to the outlet of the air duct 13 embedded in the tank foundation 14. A fan 1 is installed outside the tank foundation 14, and the fan 1 is connected to the air duct 13 through a hose 12.

[0013] S3, set up the top layer with siding 7, then hoist the tank top 6 onto the top layer with siding 7, and complete the teaming, assembly and welding with the top layer with siding 7.

[0014] S4. On the outside of the top layer of wall panels 7, a next layer of wall panels 8 is closely attached to the top layer of wall panels 7, leaving the last vertical interface 19 unwelded, and the wall panels on both sides of the vertical interface 19 are overlapped, and the overlap width is 100-200mm. Two groups of side ear plates 16 are welded on both sides of the vertical interface 19, each group consists of two side ear plates 16, and the two side ear plates 16 are respectively placed on both sides of the vertical interface 19. A hand winch 15 is installed between the two side ear plates 16 of the same group, and the wall panels on both sides of the vertical interface 19 are tightened and fixed by the hand winch 15.

[0015] S5. A protective baffle 17 is welded on the outside of the top of the next siding 8 every 60 degrees around its center, for a total of 6 baffles. A threaded hole is opened on the top of each protective baffle 17, and a top screw 18 is connected to the thread in the threaded hole. The top screw 18 is used to support and guide the next siding 8 to prevent the top from bursting during jacking.

[0016] S6. Several upper ear plates 5 are uniformly welded circumferentially on the outer circumference of the top layer with the wall plate 7, and lower ear plates 3 corresponding to the upper ear plates 5 are welded circumferentially on the tank bottom plate 2. A fall chain 4 is connected between the upper ear plate 5 and the lower ear plate 3, and the lower ear plate 3 serves as the pulling point of the fall chain 4. The setting of this structure mainly makes the lifting of the tank body more stable and more convenient to adjust the verticality of the tank body, and prevents the tank body from tilting, caving and rotating during the lifting process; In this embodiment, the position of the upper ear plate 5 can be moved down layer by layer as the tank body is gradually raised, that is, the upper ear plate 5 of the top layer with wall panel 7 is cut, and then the upper ear plate 5 is welded on the adjacent layer connected to the top layer with wall panel 7 (that is, the next wall panel 8 after being connected to the top layer with wall panel 7).

[0017] S7, a dynamic seal 10 is installed between the lower belt wall plate 8 and the top belt wall plate 7. In this embodiment, the dynamic seal 10 is a rubber plate with a U-shaped cross section, and the upper end of the dynamic seal 10 is pressed by an expansion ring 9; The expansion ring 9 in this embodiment is evenly divided into 4 arc structures 9-1, each of which covers 1 / 4 of the circumference of the inner wall of the tank body. Each arc structure 9-1 is formed by arc rolling and welding of two end channel steels, and the cross section of each arc structure 9-1 is square; at each interface of the expansion ring 9, the ends of the adjacent two end arc structures 9-1 are respectively installed with threaded sleeves 9-2, and then the two adjacent threaded sleeves 9-2 are threadedly connected by a screw 9-3, and the thread directions of the two threaded sleeves 9-2 connected by the same screw 9-3 are opposite; In this embodiment, the threaded sleeve 9-2 and the expansion ring 9 rotate relative to each other to prevent the screw 9-3 from getting stuck due to the change of the interface angle of the expansion ring 9; In order to facilitate the rotation of the screw 9-3, three through holes 9-3-1 are evenly opened in the middle circumferential direction of the screw 9-3, and the angle between adjacent through holes 9-3-1 is 60 degrees, so that a round rod can be inserted into the through hole 9-3-1 for manual operation.

[0018] S8, start the fan 1, use the gate of the fan 1 to regulate the air supply and wind pressure, and the tank body begins to rise under the action of the wind pressure; when the expansion ring 9 reaches a predetermined distance from the tank bottom, static seals 11 are respectively provided between the inner side of the next belt wall panel 8 and the tank bottom and at the vertical interface 19 of the next belt wall panel 8. At the same time, the fall chain 4 is relaxed during the rising process of the tank body, and the lifting stroke and verticality of the tank body are controlled by the fall chain until the tank body is lifted into place, that is, the overlap length between the lower edge of the top belt wall panel 7 and the upper edge of the next belt wall panel 8 is 50-80mm.

[0019] S9. Use two sets of hand hoists 15 to completely tighten the wall panels on both sides of the last interface of the next wall panel 8, so that the wall panels on both sides are completely tightened and completely closed with the top wall panel 7, complete the overlap of the interface between the top wall panel 7 and the next wall panel 8, and fix them with spot welding.

[0020] S10, gas cutting off the overlapping part of the two wall panels at the vertical interface 19 of the next wall panel 8, completing the butt joint of the vertical interface 19 and spot welding, then full welding, and removing the protective baffle 17 on the next wall panel 8.

[0021] S11. Before the overlapping interface between the top layer siding panel 7 and the next layer siding panel 8 is completely welded, the dynamic seal 10 is removed to prevent the dynamic seal 10 from being burned out when the top layer siding panel 7 and the next layer siding panel 8 are welded.

[0022] S12, repeating steps S4 to S11 until the jacking and inverting construction of the entire tank body is completed.

[0023] In the present method, the jacking of the tank body is attached to the next wall panel 8 to be installed, eliminating the need for the production, installation and disassembly of the inner guide plate, saving a lot of manpower and machine costs; the expansion ring 9 used to fix the dynamic seal 10 is very convenient to install, adjust and remove, and its various sections are locked and adjusted in the form of a threaded sleeve 9-2+screw 9-3, which is easy to operate; and the expansion ring 9 also has a good roundness correction function.

[0024] The present invention improves the working efficiency of gas pressure lifting of circular storage tanks, significantly shortens the installation time, reduces the difficulty of construction technology, and improves the construction quality.

[0025] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A construction method for a non-guide plate pneumatic jacking inverted tank is carried out according to the following steps: S1. Complete the assembly and welding of the tank bottom plate on the tank body foundation; S2. Set up a fan and connect the air duct to the tank bottom plate; Features: S3, setting up the top layer with siding, and then assembling the tank top on the top layer with siding; S4. On the outside of the top layer of wall panels, closely surround the next layer of wall panels, leaving the last vertical interface unwelded, and forming an overlap between the wall panels on both sides of the vertical interface, with an overlap width of 100-200mm, and symmetrically welding two groups of side ear panels on both sides of the vertical interface, respectively, with hand chain hoists installed between the two side ear panels of each group, and the wall panels on both sides of the vertical interface are tightened and fixed by the hand chain hoists; S5. Weld several protective baffles at intervals on the outside of the next band of wall panels, and set jacking screws on the protective baffles for supporting and guiding the wall panels during jacking; S6. Upper ear plates are welded at intervals on the top layer with wainscot plates, and lower ear plates are welded on the tank bottom plate. The upper ear plates and the lower ear plates are arranged one by one, and a fall chain is arranged between the upper ear plates and the lower ear plates; S7, a dynamic seal is installed between the lower belt wall plate and the top belt wall plate, and the upper end of the dynamic seal is compressed by an expansion ring; S8, start the fan, use the fan gate to adjust the air supply volume and wind pressure, the tank body starts to rise under the action of wind pressure, when the expansion ring reaches a predetermined distance from the tank bottom, static seals are respectively set between the inner side of the next band wall plate and the tank bottom and at the vertical interface of the next band wall plate; at the same time, the fall chain is loosened as the tank body rises, and the lifting stroke and verticality of the tank body are controlled until the tank body is lifted into place; S9. Use a hand chain hoist to tighten both sides of the vertical interface of the next band wall panel, so that the two side wall panels are completely tightened and completely fit with the top band wall panel, and complete the spot welding and fixing of the vertical interface between the top band wall panel and the next band wall panel; S10, cutting off the overlapping parts on both sides of the vertical interface of the next wall panel, completing the alignment of the vertical interface and spot welding, then fully welding, and removing the protective baffle; S11, remove the dynamic seal, and then completely weld the overlapping interface between the top layer siding plate and the next layer siding plate; S12, repeating steps S4 to S11 until the jacking and inverting construction of the entire tank body is completed.

2. The construction method of the non-guide plate pneumatic jacking inverted tank according to claim 1 is characterized by: The expansion ring in step S7 is divided into 4 sections, each section covers 1 / 4 of the circumference of the inner wall of the tank body. A threaded sleeve is provided at each interface of the expansion ring, and then two adjacent threaded sleeves are connected by a lead screw.

3. The construction method of the non-guide plate pneumatic jacking inverted tank according to claim 2 is characterized by: The thread directions of the two threaded sleeves connected with the same lead screw are opposite.

4. The construction method of the non-guide plate pneumatic jacking inverted tank according to claim 1 is characterized by: In step S5, a protective baffle is welded on the outer side of the next wall panel at an angle of 60 degrees. A threaded hole is provided on the upper part of the protective baffle, and a top screw is connected to the thread in the threaded hole.

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