Balancing system for gas jacking of steel dome of storage tank

Abstract

The utility model provides a balance system for gas jacking of a steel dome of a storage tank, which comprises a balance component, the upper end part of the balance component is fixed at the upper end of the storage tank, and the lower end of the balance component is movably connected with the lower end part of a dome body and used for guiding and balancing the dome body. A plurality of first tank bottom embedded parts are arranged at the bottom of the storage tank in an annular structure mode, and a plurality of first movable pulley sets distributed in an annular structure mode are installed on a steel beam inside the lower end of the dome body. The first steel wire rope and the second steel wire rope form 48 ascending constraints during pneumatic jacking of the steel dome, balance of the steel dome is maintained, it is guaranteed that the dome body does not twist or incline or turn over, and the first movable pulley block and the second movable pulley block are arranged, so that the stability of the dome body in the pneumatic jacking process can be guaranteed through the 48 first steel wire ropes and the 48 second steel wire ropes under the dynamic condition.

Description

Technical Field

[0001] This utility model belongs to the field of dome air lifting technology, and specifically relates to a balancing system for air lifting of steel domes of storage tanks. Background Technology

[0002] Existing gas-lift technology for steel domes of storage tanks has several key defects in its balancing system, mainly manifested in insufficient stability during the lifting process, low synchronization accuracy, and delayed emergency response. These defects primarily stem from torque imbalance caused by uneven gas pressure distribution. When the dome diameter exceeds 40 meters, traditional multi-airbag systems can generate lateral loads exceeding 15 tons due to pipeline pressure drop differences (reaching 0.05-0.1 MPa), causing dome rotational shift (with a maximum recorded deviation of 32 mm). Simultaneously, the mechanical balancing beam adjustment has a response delay of 30-50 seconds, which may cause the dome tilt angle to exceed the limit (>1.5°) in the event of sudden gusts of wind (>8 m / s), potentially leading to sealing ring tearing accidents. Commonly adopted improvement solutions in the industry include adding a counterweight balancing system (8 tons of counterweight per 10 meters of diameter) and upgrading to an electro-hydraulic servo control system. While the former can reduce the risk of off-center loading by 30%, it increases the total weight of the lifting structure by 25% and significantly reduces energy efficiency (gas consumption increases by 40%). The latter improves the synchronization accuracy to ±3mm through a PID algorithm, but the system complexity increases dramatically. A single point of failure in the servo valve can cause a complete shutdown, increasing maintenance costs by more than three times. Therefore, we hope to design a dome air lifting balancing system with a novel structure to solve this problem. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a balancing system for air jacking of steel domes of storage tanks, and to solve the problems mentioned in the background art.

[0004] This utility model is achieved through the following technical solution: a balancing system for air-lifting a steel dome of a storage tank, comprising: a balancing component, the upper part of which is fixed to the upper end of the storage tank, and the lower end of which is movably connected to the lower end of the dome body for guiding and balancing the dome body.

[0005] The bottom of the storage tank has a ring-shaped structure with multiple tank bottom embedded parts 1 and 2. Multiple ring-shaped movable pulley groups 1 and 2 are installed on the lower internal steel beams of the dome body. The balancing assembly includes bracket 1 and bracket 2. Multiple brackets 1 and 2 are fixed to the wall at the top of the storage tank in a ring structure, and each bracket 1 is movably connected to the upper end of a steel wire rope 1. The two supports are movably connected to the upper end of the second steel wire rope. In actual use, a total of 24 sets of steel wire ropes are set up, with one steel wire rope and one steel wire rope forming a set, that is, there are 24 steel wire ropes of each type. The steel wire ropes of each type are arranged symmetrically. The installation positions of the first and second supports are marked on the pressure ring on the top of the tank according to the azimuth angles of 0°, 90°, 180°, and 270°. There are a total of 48 marks on the pressure ring, and the interval between each adjacent first and second support is 7.5°.

[0006] In a preferred embodiment, the number of the first and second embedded parts at the bottom of the tank is the same as the total number of the first and second steel wire ropes, and the number of the first and second embedded parts at the bottom of the tank is the same as the total number of the first and second supports.

[0007] As a preferred embodiment, each of the first supports is provided with a tank bottom embedded part one directly below the bottom of the storage tank, and each of the second supports is provided with a tank bottom embedded part two directly below the bottom of the storage tank.

[0008] In a preferred embodiment, the number and distribution of the first movable pulley group are matched with the number and distribution of the first wire rope, and the number and distribution of the second movable pulley group are matched with the number and distribution of the second wire rope.

[0009] In a preferred embodiment, the number and distribution of the first movable pulley group are matched with the number and distribution of the first embedded part at the bottom of the tank, and the number and distribution of the second movable pulley group are matched with the number and distribution of the second embedded part at the bottom of the tank.

[0010] In a preferred embodiment, the upper surface edge of the dome body is vertically penetrated downward to form multiple through holes for making way for wire rope one and wire rope two. The number of through holes is the same as the total number of wire rope one and wire rope two, and their positions are matched. Each through hole is equipped with a guide sleeve and its inner wall is pre-coated with lubricating oil.

[0011] In a preferred embodiment, both the first and second supports are T-shaped metal frames, and the upper ends of the first and second wire ropes respectively pass over the first and second supports and are fixedly connected to the upper outer wall of the storage tank.

[0012] In a preferred embodiment, a fixed pulley group is fixed to the inner and outer sides of the upper end of bracket 1 and bracket 2 respectively to guide wire rope 1 and wire rope 2. The portion between the upper end of wire rope 1 and wire rope 2 and bracket 1 and bracket 2 is equipped with wire rope clamps, tension gauges and open spiral joints from top to bottom for limiting, measuring tension and fixing wire rope 1 and wire rope 2. In actual use, bracket 1 and bracket 2 adopt T-shaped brackets made of Φ159*8 seamless carbon steel pipes. The connection between bracket 1 and bracket 2 and the pressure ring is welded using J507RH welding rods, with a weld leg height of not less than 8mm. Bracket 1 and bracket 2 are prefabricated and welded, with a weld leg height of not less than 8mm. To prevent bracket 1 and bracket 2 from deforming due to unbalanced forces, diagonal supports and reinforcing plates are added to both sides of bracket 1 and bracket 2. All welds between bracket 1 and bracket 2 and the pressure ring must be PT tested and qualified.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. By setting up steel wire rope one and steel wire rope two, and setting multiple downward penetrating through holes on the dome body, in actual use, one end of steel wire rope one and steel wire rope two is fixed to the top of the outer tank wall. Through T-shaped bracket one and bracket two (the T-shaped bracket mainly has two sets of fixed pulleys welded on it, and its main function is to support the two sets of fixed pulleys), steel wire rope one and steel wire rope two are turned and moved in position, passing through the through holes drilled in the steel dome (the holes temporarily made during construction). After passing through the steel dome, steel wire rope one and steel wire rope two are fixed to the tank bottom embedded parts opposite to the location of bracket one and bracket two by two sets of movable pulleys arranged on the steel beams of the dome body. Steel wire rope one and steel wire rope two form 48 constraints for the upward movement of the steel dome during air lifting, maintaining the balance of the steel dome and ensuring that the dome body does not twist, tilt or overturn.

[0014] 2. By setting up movable pulley group one and movable pulley group two, in actual use, the lower end of wire rope one is rolledly connected to the lower side of movable pulley group one and to the upper side of movable pulley group two. Then its end is fixedly connected downward to the bottom embedded part two of the tank on the lower side of movable pulley group two. The lower end of wire rope two is rolledly connected to the lower side of movable pulley group two and to the upper side of movable pulley group one. Then its end is fixedly connected downward to the bottom embedded part one of the tank on the lower side of movable pulley group one. As the dome body is continuously lifted by air, under the action of movable pulley group one, movable pulley group two and two sets of fixed pulley groups on support one and support two, the upper part of wire rope one and wire rope two gradually shortens and the lower part gradually lengthens. It can ensure the stability of the dome body during the air lifting process under dynamic conditions through 48 wire ropes one and two. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a balancing system for air-lifting a steel dome of a storage tank, according to this utility model.

[0017] Figure 2 This is a schematic diagram of the wire rope fixing structure of a balancing system for air-lifting a steel dome of a storage tank according to the present invention.

[0018] Figure 3 This is a schematic diagram of the steel wire rope fixing structure of a balancing system for air-lifting a steel dome of a storage tank according to this utility model.

[0019] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at point A in the middle.

[0020] In the diagram, 100 represents the storage tank, and 110 represents the first embedded part at the bottom of the tank.

[0021] 200 - Dome body, 210 - Pulley block one, 220 - Pulley block two;

[0022] 300 - Balance component, 310 - Support 1, 320 - Wire rope 1, 330 - Wire rope 2, 340 - Support 2. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As the first embodiment of this utility model:

[0025] Please see Figures 1 to 4 A balancing system for air-lifting a steel dome of a storage tank includes: a balancing component 300, the upper part of which is fixed to the upper part of the storage tank 100, and the lower part of which is movably connected to the lower part of the dome body 200 for guiding and balancing the dome body 200.

[0026] The bottom of the storage tank 100 has a ring-shaped structure with multiple tank bottom embedded parts 110 and 2. Multiple ring-shaped movable pulley sets 210 and 220 are installed on the lower internal steel beam of the dome body 200. The balancing assembly 300 includes a first support 310 and a second support 340. Multiple first supports 310 and second supports 340 are fixed to the top wall of the storage tank 100 in a ring structure. Each first support 310 is movably connected to the upper end of a steel wire rope 320, and each second support 340... The upper end of a steel wire rope 330 is movable and abuts against it. In actual use, a total of 24 sets of steel wire rope 320 are set up, and one steel wire rope 320 and one steel wire rope 330 form a set, that is, there are 24 steel wire ropes 320 and 24 steel wire ropes 330. The steel wire rope 320 and one steel wire rope 330 are arranged symmetrically. According to the azimuth angles of 0°, 90°, 180° and 270° on the pressure ring of the tank top, the installation positions of support 310 and support 340 are marked on the pressure ring with a total station, a total of 48. The interval between each adjacent support 310 and support 340 is 7.5°.

[0027] The number of tank bottom embedded parts 110 and 2 is the same as the sum of steel wire rope 1 320 and steel wire rope 2 330. The number of tank bottom embedded parts 110 and 2 is the same as the sum of support 1 310 and support 2 340.

[0028] Each support 310 is provided with a tank bottom embedded part 110 directly below the bottom of the storage tank 100, and each support 340 is provided with a tank bottom embedded part 2 directly below the bottom of the storage tank 100.

[0029] Specifically, by setting up steel wire rope 320 and steel wire rope 330, and by setting multiple downward through holes on the dome body 200, in actual use, one end of steel wire rope 320 and steel wire rope 330 is fixed to the top of the outer tank wall. The steel wire rope 320 and steel wire rope 330 are then redirected and repositioned through T-shaped supports 310 and 340 (the T-shaped supports mainly consist of two sets of fixed pulleys welded onto a single T-shaped support, whose main function is to support the two sets of fixed pulleys) and pass through the steel dome. The through holes drilled at the top (temporary holes made during construction) allow steel wire ropes 320 and 330 to pass through the steel dome. They then pass through two sets of movable pulleys 210 and 220 arranged on the steel beams of the dome body 200, and are fixed to the pre-embedded parts at the bottom of the tank opposite the positions of support 310 and support 340. The steel wire ropes 320 and 330 form 48 constraints for the steel dome to rise during air lifting, maintaining the balance of the steel dome and ensuring that the dome body 200 does not twist, tilt, or overturn.

[0030] As a second embodiment of this utility model:

[0031] Please see Figures 1 to 4 The number and distribution of movable pulley block 210 are matched with the number and distribution of wire rope 320, and the number and distribution of movable pulley block 220 are matched with the number and distribution of wire rope 330.

[0032] The number and distribution of movable pulley block 210 are matched with the number and distribution of tank bottom embedded part 110, and the number and distribution of movable pulley block 220 are matched with the number and distribution of tank bottom embedded part 2.

[0033] Multiple through holes are formed vertically downward through the upper surface edge of the dome body 200 to make way for wire rope 1 320 and wire rope 2 330. The number of through holes is the same as the total number of wire rope 1 320 and wire rope 2 330, and their positions are matched. Each through hole has a guide sleeve installed inside and the inner wall is pre-coated with lubricating oil.

[0034] Both support bracket 1 (310) and support bracket 2 (340) are T-shaped metal frames. The upper ends of steel wire rope 1 (320) and steel wire rope 2 (330) pass over support bracket 1 (310) and support bracket 2 (340) respectively and are fixedly connected to the upper outer wall of storage tank 100.

[0035] A fixed pulley group is fixed to the inner and outer sides of the upper end of bracket 1 (310) and bracket 2 (340) respectively to guide wire rope 1 (320) and wire rope 2 (330). From top to bottom, the portion between the upper end of wire rope 1 (320) and wire rope 2 (330) and bracket 1 (310) and bracket 2 (340) is equipped with a wire rope clamp, a tension gauge, and an open spiral joint for limiting, measuring tension, and fixing wire rope 1 (320) and wire rope 2 (330). In actual use, bracket 1 (310) and bracket 2 (340) adopt T-shaped brackets with Φ... The 159*8 seamless carbon steel pipes, bracket 1 (310) and bracket 2 (340) are connected to the pressure ring by welding using J507RH welding rods, with a weld leg height of not less than 8mm. Bracket 1 (310) and bracket 2 (340) are prefabricated and welded, with a weld leg height of not less than 8mm. To prevent bracket 1 (310) and bracket 2 (340) from deforming due to unbalanced forces, diagonal supports and reinforcing plates are added to both sides of bracket 1 (310) and bracket 2 (340). All welds between bracket 1 (310) and bracket 2 (340) and the pressure ring must be PT tested and pass the test.

[0036] Based on the first embodiment described above, further, by setting up a first movable pulley block 210 and a second movable pulley block 220, in actual use, the lower end of the first wire rope 320 is rolledly connected to the lower part of the first movable pulley block 210 and rolledly connected to the upper part of the second movable pulley block 220, and then its end is fixedly connected downwards to the second embedded part at the bottom of the tank on the lower side of the second movable pulley block 220. Meanwhile, the lower end of the second wire rope 330 is rolledly connected to the lower part of the second movable pulley block 220 and rolledly connected to the upper part of the first movable pulley block 210, and then its end is fixedly connected downwards. The dome body 200 is fixedly connected to the tank bottom embedded part 110 on the lower side of the movable pulley block 210. As the dome body 200 is continuously lifted by air, under the action of the movable pulley block 210, the movable pulley block 220, and the two sets of fixed pulley blocks on the support 310 and the support 340, the upper part of the steel wire rope 320 and the steel wire rope 330 gradually shortens, while the lower part gradually lengthens. It can ensure the stability of the dome body 200 during the air lifting process through 48 steel wire ropes 320 and 330 under dynamic conditions.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A balancing system for pneumatic jacking of a steel dome of a storage tank, comprising: The balancing assembly (300) is characterized in that the upper part of the balancing assembly (300) is fixed to the upper part of the storage tank (100), and the lower part of the balancing assembly (300) is movably connected to the lower part of the dome body (200) for guiding and balancing the dome body (200). The bottom of the storage tank (100) is provided with a ring structure with multiple tank bottom embedded parts 1 (110) and tank bottom embedded parts 2. Multiple movable pulley groups 1 (210) are installed on the steel beam inside the lower end of the dome body (200) in a ring structure. Multiple movable pulley groups 2 (220) are installed on the steel beam inside the lower end of the dome body (200) in a ring structure. The balance component (300) includes a support 1 (310) and a support 2 (340). Multiple supports 1 (310) and supports 2 (340) are fixed to the wall at the top of the storage tank (100) in a ring structure. Each support 1 (310) is movably abutted against the upper end of a steel wire rope 1 (320), and each support 2 (340) is movably abutted against the upper end of a steel wire rope 2 (330).

2. The balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 1, characterized in that: The number of the first (110) and the second (330) pre-embedded parts at the bottom of the tank are the same as the sum of the first (320) and the second (330) steel wire ropes, and the number of the first (110) and the second (340) pre-embedded parts at the bottom of the tank are the same as the sum of the first (310) and the second (340) support.

3. The balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 2, characterized in that: Each of the first brackets (310) is provided with a tank bottom embedded part 1 (110) directly below the bottom of the storage tank (100), and each of the second brackets (340) is provided with a tank bottom embedded part 2 directly below the bottom of the storage tank (100).

4. The balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 3, characterized in that: The number and distribution of the first movable pulley group (210) are matched with the number and distribution of the first wire rope (320), and the number and distribution of the second movable pulley group (220) are matched with the number and distribution of the second wire rope (330).

5. A balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 4, characterized in that: The number and distribution of the first movable pulley group (210) are matched with the number and distribution of the first embedded part (110) at the bottom of the tank, and the number and distribution of the second movable pulley group (220) are matched with the number and distribution of the second embedded part at the bottom of the tank.

6. The balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 1, characterized in that: The upper surface edge of the dome body (200) forms multiple through holes that extend vertically downwards to make way for wire rope one (320) and wire rope two (330). The number of through holes is the same as the sum of wire rope one (320) and wire rope two (330), and their positions are matched. Each through hole has a guide sleeve installed inside and its inner wall is pre-coated with lubricating oil.

7. The balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 1, characterized in that: Both the first bracket (310) and the second bracket (340) are T-shaped metal frames. The upper ends of the first wire rope (320) and the second wire rope (330) pass over the first bracket (310) and the second bracket (340) respectively and are fixedly connected to the upper outer wall of the storage tank (100).

8. The balancing system for pneumatic jacking of a steel dome of a storage tank as described in claim 7, characterized in that: The upper inner and outer sides of the bracket one (310) and bracket two (340) are respectively fixed with a fixed pulley group to guide the wire rope one (320) and wire rope two (330). The upper part of the wire rope one (320) and wire rope two (330) between the bracket one (310) and bracket two (340) is equipped with a wire rope clamp, a tension gauge and an open spiral port from top to bottom to limit, measure tension and fix the wire rope one (320) and wire rope two (330).

Images