Inverted method for large storage tanks

Abstract

This invention belongs to the field of installation technology for large storage tanks, specifically relating to a method for inverting large storage tanks. During lifting and lowering, the side plate curvature is ensured by the support rollers and brackets, eliminating the need for expansion rings and internal supports, thus reducing auxiliary material consumption. Because the side plate is close to the support frame, and the ribs are located below the ear plates, the force exerted by the electric hoist or hand-operated hoist during lifting and lowering is closer to vertical, resulting in a more rational force direction, reduced swaying, and improved safety.

Description

Technical Field

[0001] This invention belongs to the field of installation technology for large storage tanks, and specifically relates to a method for inverting a large storage tank. Background Technology

[0002] Large storage tanks are vertical tanks used in the petrochemical industry for storing oil or gas. Large storage tanks typically have a capacity of over 100 cubic meters and are installed on-site using stainless steel plates and supports. The inverted installation method is a relatively mature construction method for large storage tanks, which involves using hand-operated hoists or hydraulic devices to lift them and assemble them layer by layer from top to bottom.

[0003] The installation of large storage tanks is typically accomplished using the following steps:

[0004] The first step is to install the tank bottom plate, fix the support base to the bottom plate, and place the side plate vertically on the support base and bend it towards the center of the bottom plate.

[0005] The second step involves welding multiple side plates together end to end to form a cylindrical ring plate. Then, an expansion ring is installed on the inner wall of the ring plate using a gantry clip, ensuring that the expansion ring and the ring plate are concentrically arranged. This allows the ring plate to maintain its shape during the lifting process. Finally, a top cover is installed on the ring plate.

[0006] The third step involves connecting the expansion ring to the hydraulic jacking device via a chain. A sprocket is mounted on the piston rod of the hydraulic jacking device. Through the cooperation of the hydraulic jacking device, chain, and sprocket, the ring plate and top cover are lifted together to a certain height h, which is greater than the height of the side plate. Then, the lower ring plate is placed, assembled, and welded.

[0007] The fourth step is to place the side plate vertically on the support base and bend it toward the center of the base plate; then, using the hydraulic lifting device, chain and sprocket, lower the welded ring plate and top cover, and weld the upper and lower adjacent ring plates together.

[0008] The fifth step is to remove the expansion ring and install it on the inner wall of the ring plate to be lifted using a gantry clip, so that the two are concentrically arranged. Then, through the cooperation of the hydraulic lifting device, chain and sprocket, the welded ring plate and the top cover are lifted together to a certain height h, where h is greater than the height of the side plate.

[0009] Repeat steps four and five until the last ring plate is welded to the adjacent upper ring plate. Then, using a hydraulic lifting device, chain, and sprocket, lower the welded ring plate and top cover, and weld the lower end of the last ring plate to the base plate.

[0010] The above method requires repeated disassembly and reassembly of the expansion ring, which has technical problems such as inconvenience in operation, time consumption, and waste of manpower. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to provide a method for reversing the installation of large storage tanks, which can avoid repeated disassembly and reassembly of expansion rings and save construction time.

[0012] The technical solution adopted by this invention to solve its technical problem is: a method for inverting large storage tanks, comprising the following steps:

[0013] S10, a circular base plate is installed on the foundation, and a support mechanism is installed on the base plate. Multiple sets of support mechanisms are provided, and the multiple sets of support mechanisms are evenly distributed along the circumference of the base plate. The support mechanism includes a support seat and a support frame for cooperation. The support seat is provided with an arc-shaped placement groove with the same curvature as the side plate. The arc-shaped placement groove opens upward and bends towards the center of the base plate. Among the multiple sets of support mechanisms, the arc-shaped placement groove on the support seat forms a circular structure concentric with the base plate along its own extension direction. The support frame has a support surface for supporting the side plate. The arc-shaped placement groove and the support surface are arranged at intervals along the direction from the edge of the base plate to the center.

[0014] S20, place the side plate vertically in the arc-shaped placement groove and bend it toward the center of the bottom plate so that the supporting surface contacts the inner side wall of the side plate; weld multiple side plates together end to end to form a cylindrical ring plate; install the top cover on the top of the ring plate;

[0015] S30, install the bracket at the bottom of the side plate and support the side plate; connect the support frame and the bracket with a hand hoist or electric hoist, and lift the ring plate and the top cover together by h, where h is greater than the height of the side plate;

[0016] S40, place the side plate vertically in the arc-shaped placement groove and bend it toward the center of the bottom plate so that the supporting surface contacts the inner wall of the side plate; weld multiple side plates together end to end to form a cylindrical ring plate;

[0017] S50: Install the bracket at the bottom of the side plate and support the side plate; lower the welded ring plate and top cover using a hand hoist or electric hoist; temporarily reinforce the welded ring plate and top cover using a bracket; remove the bracket located at the bottom of the side plate of the adjacent upper ring plate; weld the upper and lower adjacent ring plates together; then lift the welded ring plate and top cover together to a height h using a hand hoist or electric hoist, where h is greater than the height of the side plate.

[0018] S60, repeat step S50 until the last ring plate is welded to the adjacent upper ring plate. Then, use a hand hoist or electric hoist to lower the welded ring plate and top cover. Use a bracket to temporarily reinforce the welded ring plate and top cover. Remove the bracket located under the side plate of the adjacent upper ring plate and weld the lower end of the last ring plate to the bottom plate.

[0019] Furthermore, the support frame includes a support column vertically arranged on the base plate, an ear plate at the top of the support column, and a horizontally arranged support roller rotatably mounted on the support column. The support roller is located on the side of the support column adjacent to the edge of the base plate and protrudes outward, with the outer circumferential surface of the support roller serving as the support surface.

[0020] Furthermore, a diagonal brace is provided between the support column and the base plate. The upper end of the diagonal brace is connected to the support column, and the diagonal brace is located on the side adjacent to the center of the support column and the base plate. Two diagonal braces are provided, and the two diagonal braces are symmetrical about the axis of the support column 301.

[0021] Furthermore, the bracket includes a horizontally arranged support plate, and the upper surface of the support plate is provided with a vertically arranged inner limiting plate and an outer limiting plate; the inner limiting plate and the outer limiting plate are arranged at intervals along the direction from the center of the bottom plate to the edge, and form a side plate placement groove with the opening facing upward.

[0022] It also includes a rib plate vertically disposed between the upper surface of the pallet and the inner limiting plate, the rib plate being located outside the side plate placement groove; the ear plate and the rib plate are connected by a hand chain hoist or an electric hoist.

[0023] Furthermore, it also includes an inner adjusting bolt and an outer adjusting bolt; the inner adjusting bolt is installed on the inner limiting plate, and the outer adjusting bolt is installed on the outer limiting plate; both the inner adjusting bolt and the outer adjusting bolt extend into the side plate placement groove; there are two outer adjusting bolts, which are spaced apart along the length of the side plate placement groove; the inner adjusting bolt is located between the two outer adjusting bolts.

[0024] Furthermore, it also includes a reinforcing plate vertically disposed between the upper surface of the pallet and the inner limiting plate, the reinforcing plate being located outside the side plate placement groove; two reinforcing plates are spaced apart along the length direction of the side plate placement groove, and the rib is located between the two reinforcing plates.

[0025] Furthermore, the support base includes a first support vertical plate and a second support vertical plate welded to the base plate. One end of the first support vertical plate in the length direction and one end of the second support vertical plate in the length direction are connected to each other, forming an L-shaped structure with an opening towards the center of the base plate.

[0026] The arc-shaped placement groove includes a first arc-shaped groove and a second arc-shaped groove that are connected to each other. The first arc-shaped groove is disposed on the top of the first supporting vertical plate, and the second arc-shaped groove is disposed on the top of the second supporting vertical plate.

[0027] Both the first and second arc-shaped grooves are bent toward the center of the base plate.

[0028] Furthermore, the support base is arranged correspondingly to at least one support frame.

[0029] Furthermore, each set of support mechanisms has two support seats, which are arranged at intervals along the circumference of the base plate, and the support frame is located between the two support seats.

[0030] Furthermore, the rib is located below the ear plate.

[0031] Compared with existing technologies, the advantages of this invention are: This invention provides a method for inverting large storage tanks, which avoids repeated disassembly and reassembly of expansion rings, saving construction time. During lifting and lowering, the side plate curvature is ensured by the support rollers and brackets, eliminating the need for expansion rings and internal supports, thus reducing auxiliary material consumption. Because the side plate is close to the support frame, and the ribs are located below the ear plates, the force exerted by the electric hoist or hand-operated hoist during lifting and lowering is closer to vertical, resulting in a more reasonable force direction, reduced swaying, and improved safety. For side plates with factory-applied coatings, it reduces coating damage caused by welding. Attached Figure Description

[0032] Figure 1 This is a top view of the structure of the foundation, base plate, support seat, support frame, bracket and side plate in this invention;

[0033] Figure 2 This is a side view of the structure of the foundation, base plate, support seat, support frame, bracket and side plate in this invention;

[0034] Figure 3 This is a front view of the support base in this invention;

[0035] Figure 4 This is a top view of the support base in this invention;

[0036] Figure 5 This is a perspective view of the support frame in this invention;

[0037] Figure 6 This is a top view of the support frame in this invention;

[0038] Figure 7 This is a schematic diagram showing the positions of the bracket and the side plate in this invention;

[0039] Figure 8 This is a side view of the bracket in this invention (wherein the inner and outer adjusting bolts are not shown);

[0040] Reference numerals in the attached drawings: 1-Base plate; 2-Support seat; 201-First support vertical plate; 2011-First arc-shaped groove; 202-Second support vertical plate; 2021-Second arc-shaped groove; 3-Support frame; 301-Support column; 302-Diagonal brace; 303-Support roller; 304-Ear plate; 4-Bracket; 401-Bracket plate; 402-Inner limiting plate; 403-Outer limiting plate; 404-Rib plate; 405-Inner adjusting bolt; 406-Outer adjusting bolt; 407-Reinforcing plate; 5-Side plate; 6-Foundation. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] The method for inverting large storage tanks includes the following steps:

[0043] S10, a circular base plate 1 is installed on the foundation 6, and a support mechanism is installed on the base plate 1. Multiple sets of support mechanisms are provided, and the multiple sets of support mechanisms are evenly distributed along the circumference of the base plate 1. The support mechanism includes a support seat 2 and a support frame 3 for cooperation. The support seat 2 is provided with an arc-shaped placement groove with the same curvature as the side plate 5. The arc-shaped placement groove opens upward and bends towards the center of the base plate 1. Among the multiple sets of support mechanisms, the arc-shaped placement groove on the support seat 2 forms a circular structure concentric with the base plate 1 along its own extension direction. The support frame 3 has a support surface for supporting the side plate 5. The arc-shaped placement groove and the support surface are arranged at intervals along the direction from the edge of the base plate 1 to the center.

[0044] S20, place the side plate 5 vertically in the arc-shaped placement groove and bend it toward the center of the bottom plate 1 so that the supporting surface contacts the inner wall of the side plate 5; weld multiple side plates 5 together end to end to form a cylindrical ring plate; install a top cover on the top of the ring plate.

[0045] S30, install bracket 4 on the lower part of side plate 5 and support side plate 5; connect support frame 3 and bracket 4 with hand hoist or electric hoist, and lift ring plate and top cover together by h, where h is greater than the height of side plate 5;

[0046] S40, place the side plate 5 vertically in the arc-shaped placement groove and bend it toward the center of the bottom plate 1 so that the supporting surface contacts the inner wall of the side plate 5; weld multiple side plates 5 together end to end to form a cylindrical ring plate.

[0047] S50, install bracket 4 at the lower part of side plate 5 and support side plate 5; lower the welded ring plate and top cover by hand hoist or electric hoist, temporarily reinforce the welded ring plate and top cover by bracket, remove bracket 4 located at the lower part of side plate 5 of adjacent upper ring plate, and weld the upper and lower adjacent ring plates together; then lift the welded ring plate and top cover together to a height h by hand hoist or electric hoist, where h is greater than the height of side plate 5;

[0048] S60, repeat step S50 until the last ring plate is welded to the adjacent upper ring plate. Then, lower the welded ring plate and top cover using a hand hoist or electric hoist. Temporarily reinforce the welded ring plate and top cover using a bracket. Remove the bracket 4 located under the side plate 5 of the adjacent upper ring plate and weld the lower end of the last ring plate to the bottom plate 1.

[0049] The base plate 1 provides mounting support for the support base 2 and the support frame 3. In the multiple support mechanisms, the arc-shaped placement grooves on the support base 2 extend along their own direction to form a circular structure concentric with the base plate 1, providing a placement reference for the side plates 5. Multiple side plates 5 are then connected end-to-end to form a cylindrical ring plate concentric with the base plate 1. Through the cooperation of the support frame 3 and the support base 2, the side plates 5 are placed vertically and stably. When lifting or lowering the welded ring plate and top cover, stable support is provided for the welded ring plate and top cover.

[0050] Specifically, the support frame 3 includes a vertically mounted support column 301 on the base plate 1. The top of the support column 301 is provided with an ear plate 304. A horizontally arranged support roller 303 is rotatably mounted on the support column 301. The support roller 303 is located on the side of the support column 301 adjacent to the edge of the base plate 1 and protrudes outwards. The outer circumferential surface of the support roller 303 serves as a support surface. When the side plate 5 is vertically placed in the arc-shaped placement groove and bent towards the center of the base plate 1, the outer circumferential surface of the support roller 303 contacts the inner wall of the side plate 5, supporting the side plate 5. It provides stable support for the welded ring plate and top cover when lifting or lowering them. Preferably, the top of the support column 301 is connected to the ear plate 304 by bolts or welding. It should be ensured that the support roller 303 protrudes outwards from the outside of the support column 301, that is, on the side of the support column 301 adjacent to the edge of the base plate 1.

[0051] Preferably, a diagonal brace 302 is provided between the support column 301 and the base plate 1. The upper end of the diagonal brace 302 is connected to the support column 301, and the diagonal brace 302 is located on the side adjacent to the center of the support column 301 and the base plate 1. Two diagonal braces 302 are provided, and the two diagonal braces 302 are symmetrical about the axis of the support column 301. By providing the diagonal brace 302, the stability of the support column 301 is improved. The upper end of the diagonal brace 302 is connected to the support column 301 by bolts or welding, and there is a gap between the lower end of the diagonal brace 302 and the support column 301.

[0052] Specifically, the bracket 4 includes a horizontally arranged support plate 401, the upper surface of which is provided with a vertically arranged inner limiting plate 402 and an outer limiting plate 403; the inner limiting plate 402 and the outer limiting plate 403 are spaced apart along the direction from the center to the edge of the base plate 1, forming an upward-facing side plate placement groove; it also includes a rib plate 404 vertically arranged between the upper surface of the support plate 401 and the inner limiting plate 402, the rib plate 404 being located outside the side plate placement groove; the ear plate 304 is connected to the rib plate 404 via a hand chain hoist or an electric hoist. Both the inner limiting plate 402 and the outer limiting plate 403 are welded to the upper surface of the support plate 401. The upper surface of the support plate 401 and the inner limiting plate 402 are both welded to 404. Both the ear plate 304 and the rib plate 404 are provided with through holes for installing hooks of the hand chain hoist or electric hoist. The side plate 5 is located in the side plate placement groove, the support plate 401 supports the bottom of the side plate 5, and the inner limiting plate 402 and the outer limiting plate 403 limit the inner and outer sides of the side plate 5 respectively.

[0053] Preferably, the device further includes an inner adjusting bolt 405 and an outer adjusting bolt 406; the inner adjusting bolt 405 is mounted on the inner limiting plate 402, and the outer adjusting bolt 406 is mounted on the outer limiting plate 403; both the inner adjusting bolt 405 and the outer adjusting bolt 406 extend into the side plate placement groove; two outer adjusting bolts 406 are provided, and the two outer adjusting bolts 406 are arranged at intervals along the length direction of the side plate placement groove; the inner adjusting bolt 405 is located between the two outer adjusting bolts 406. By adjusting the inner adjusting bolt 405 and the outer adjusting bolt 406, the side plate 5 is clamped to ensure safety during the lifting and lowering process.

[0054] As a further preferred embodiment, two inner adjusting bolts 405 are provided, and the rib plate 404 is located between the two inner adjusting bolts 405.

[0055] As a further preferred embodiment, a reinforcing plate 407 is also included, vertically disposed between the upper surface of the support plate 401 and the inner limiting plate 402, the reinforcing plate 407 being located outside the side plate placement groove; two reinforcing plates 407 are spaced apart along the length of the side plate placement groove, and the rib plate 404 is located between the two reinforcing plates 407. Both the upper surface of the support plate 401 and the inner limiting plate 402 are welded to the reinforcing plates 407. By providing the reinforcing plates 407, the structural strength of the bracket 4 is improved.

[0056] The support base 2 can be a block structure. Preferably, the support base 2 includes a first support vertical plate 201 and a second support vertical plate 202 welded to the base plate 1. One end of the first support vertical plate 201 and one end of the second support vertical plate 202 are connected along their length, forming an L-shaped structure that opens towards the center of the base plate 1. The arc-shaped placement groove includes a first arc-shaped groove 2011 and a second arc-shaped groove 2021 that are connected. The first arc-shaped groove 2011 is disposed on the top of the first support vertical plate 201, and the second arc-shaped groove 2021 is disposed on the top of the second support vertical plate 202. Both the first arc-shaped groove 2011 and the second arc-shaped groove 2021 are curved towards the center of the base plate 1. One end of the first support vertical plate 201 and one end of the second support vertical plate 202 along their length can be connected by welding. Preferably, the L-shaped support base 2 is an integrally formed structure.

[0057] Preferably, the support base 2 is arranged corresponding to at least one support frame 3.

[0058] Preferably, each set of support mechanisms has two support seats 2, which are arranged at intervals along the circumference of the base plate 1, and the support frame 3 is located between the two support seats 2.

[0059] Preferably, the rib plate 404 is located below the ear plate 304. Because the side plate 5 is close to the support frame 3 and the rib plate 404 is located below the ear plate 304, the force exerted by the electric hoist or hand chain hoist during lifting and lowering is closer to vertical, the direction of the force is more reasonable, the swaying is reduced, and the safety is improved.

[0060] The support base 2, support frame 3 and bracket 4 can be made of cemented carbide, preferably steel.

[0061] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent changes made to the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method of inverting a large storage tank, characterised in that, Including the following steps: S10, install a circular base plate (1) on the foundation (6), install a support mechanism on the base plate (1), and set up multiple sets of support mechanisms, which are evenly distributed along the circumference of the base plate (1); the support mechanism includes a support seat (2) and a support frame (3) used in conjunction; the support seat (2) is provided with an arc-shaped placement groove with the same curvature as the side plate (5), the arc-shaped placement groove opens upward and bends towards the center of the base plate (1); the arc-shaped placement groove on the support seat (2) in the multiple sets of support mechanisms forms a circular structure concentric with the base plate (1) along its own extension direction; the support frame (3) has a support surface for supporting the side plate (5), and the arc-shaped placement groove and the support surface are arranged at intervals along the direction from the edge of the base plate (1) to the center; S20, place the side plate (5) vertically in the arc-shaped placement groove and bend it toward the center of the bottom plate (1) so that the supporting surface contacts the inner wall of the side plate (5); weld multiple side plates (5) together end to end to form a cylindrical ring plate; install a top cover on the top of the ring plate; S30, install bracket (4) on the lower part of side plate (5) and support side plate (5); connect support frame (3) and bracket (4) with hand hoist or electric hoist, and lift ring plate and top cover together by h, h is greater than the height of side plate (5); S40, place the side plate (5) vertically in the arc-shaped placement groove and bend it toward the center of the bottom plate (1) so that the supporting surface contacts the inner wall of the side plate (5); weld multiple side plates (5) together end to end and form a cylindrical ring plate; S50, install bracket (4) on the lower part of side plate (5) and support side plate (5); lower the welded ring plate and top cover by hand hoist or electric hoist, temporarily reinforce the welded ring plate and top cover by bracket, remove bracket (4) located at the lower part of side plate (5) of adjacent upper ring plate, weld the upper and lower adjacent ring plates together; then lift the welded ring plate and top cover together to a height h by hand hoist or electric hoist, h is greater than the height of side plate (5); S60, repeat step S50 until the last ring plate is welded to the adjacent upper ring plate. Then, use a hand hoist or electric hoist to lower the welded ring plate and top cover. Use a bracket to temporarily reinforce the welded ring plate and top cover. Remove the bracket (4) located under the side plate (5) of the adjacent upper ring plate and weld the lower end of the last ring plate to the bottom plate (1).

2. The method of claim 1, wherein The support frame (3) includes a support column (301) vertically arranged on the base plate (1). The top of the support column (301) is provided with an ear plate (304). A horizontally arranged support roller (303) is rotatably installed on the support column (301). The support roller (303) is located on the side adjacent to the edge of the base plate (1) of the support column (301) and protrudes outward. The outer peripheral surface of the support roller (303) serves as the support surface.

3. The method of claim 2, wherein the large storage tank is a large-scale water tank. A diagonal brace (302) is provided between the support column (301) and the base plate (1). The upper end of the diagonal brace (302) is connected to the support column (301). The diagonal brace (302) is located on the side adjacent to the center of the support column (301) and the base plate (1). There are two diagonal braces (302). The two diagonal braces (302) are symmetrical about the axis of the support column (301).

4. The method of overturning a large storage tank according to claim 2 or 3, characterized by, The bracket (4) includes a horizontally arranged tray (401), and the upper surface of the tray (401) is provided with a vertically arranged inner limiting plate (402) and an outer limiting plate (403); the inner limiting plate (402) and the outer limiting plate (403) are arranged at intervals along the direction from the center of the bottom plate (1) to the edge, and form a side plate placement groove with the opening facing upward; It also includes a rib plate (404) vertically disposed between the upper surface of the pallet (401) and the inner limiting plate (402), the rib plate (404) being located outside the side plate placement groove; the ear plate (304) and the rib plate (404) are connected by a hand chain hoist or an electric hoist.

5. The method of claim 4, wherein the large storage tank is inverted by, It also includes an inner adjusting bolt (405) and an outer adjusting bolt (406); the inner adjusting bolt (405) is installed on the inner limiting plate (402), and the outer adjusting bolt (406) is installed on the outer limiting plate (403); both the inner adjusting bolt (405) and the outer adjusting bolt (406) extend into the side plate placement groove; there are two outer adjusting bolts (406), and the two outer adjusting bolts (406) are arranged at intervals along the length direction of the side plate placement groove; the inner adjusting bolt (405) is located between the two outer adjusting bolts (406).

6. The method of claim 4, wherein the large storage tank is a large-scale water tank. It also includes a reinforcing plate (407) vertically disposed between the upper surface of the pallet (401) and the inner limiting plate (402), the reinforcing plate (407) being located outside the side plate placement groove; two reinforcing plates (407) are spaced apart along the length of the side plate placement groove, and the rib plate (404) is located between the two reinforcing plates (407).

7. The method of claim 1, wherein the large storage tank is a tank for storing crude oil, water, or a chemical product. The support base (2) includes a first support vertical plate (201) and a second support vertical plate (202) that are welded to the base plate (1). One end of the first support vertical plate (201) in the length direction and one end of the second support vertical plate (202) in the length direction are connected to form an L-shaped structure with an opening towards the center of the base plate (1). The arc-shaped placement groove includes a first arc-shaped groove (2011) and a second arc-shaped groove (2021) that are connected to each other. The first arc-shaped groove (2011) is disposed on the top of the first support vertical plate (201), and the second arc-shaped groove (2021) is disposed on the top of the second support vertical plate (202). The first arc-shaped groove (2011) and the second arc-shaped groove (2021) are both bent toward the center of the bottom plate (1).

8. The method of claim 1, wherein, The support base (2) is arranged in relation to at least one support frame (3).

9. The method of claim 1, wherein, Each set of support mechanisms has two support seats (2), which are arranged at intervals along the circumference of the base plate (1), and the support frame (3) is located between the two support seats (2).

10. The method of claim 4, wherein the large storage tank is a large-scale water tank. The rib plate (404) is located below the ear plate (304).

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