Combined basket and method for installing steel panels for underground silo-type gas storage caverns

Abstract

The present application belongs to compressed air energy storage technical field, disclose a kind of combined basket for underground silo type gas storage chamber steel plate installation, including outer ring basket assembly, center basket assembly and suspension assembly;Outer ring basket assembly is close to the inner wall of silo type gas storage chamber, to install the lining steel plate of silo type gas storage chamber;Center basket assembly is arranged on the central axis of silo type gas storage chamber, to transport steel plate material and lining steel plate;Suspension assembly is installed in the transverse passage of silo type gas storage chamber, as the force component of outer ring basket assembly and center basket assembly suspension;The present application provides a new method for the installation of lining steel plate in the underground silo type super-large space gas storage chamber of compressed air energy storage power station, which can significantly shorten the construction period compared to the traditional scaffold construction method;Its construction space occupation is smaller, avoids the disassembly process after construction, provides a convenient means for the maintenance and repair of steel plate in the later operation stage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressed air energy storage, in particular to a combined hanging basket for installing a steel plate of a cylindrical underground storage chamber. BACKGROUND

[0002] Renewable energy such as wind and solar energy is considered an important means to solve the increasingly serious energy crisis and environmental pollution problems, but its inherent intermittency and uncertainty seriously affect the safe and stable operation of the power system, hindering its healthy development. The application of energy storage technology can realize flexible scheduling of renewable energy, enhance the flexibility of the power grid, and thus improve the economy of power grid operation. Among them, compressed air energy storage (CAES) is a large-capacity long-time physical energy storage technology, which does not involve the combustion of fossil fuels and does not emit any harmful substances, and is more environmentally friendly. It can greatly improve the time and space structure of power generation and power consumption, increase the peak shaving capacity of the power grid, solve the intermittency problem of renewable energy, and is being widely promoted and applied in China.

[0003] The new compressed air energy storage system mainly uses ground storage tanks, underground abandoned mine caverns, aquifers, salt rock caverns, and natural or artificial underground hard rock caverns as high-pressure air storage containers. Currently, the compressed air energy storage power stations that have been built and are in commercial operation at home and abroad mainly use underground salt caverns as air storage devices, which have lower costs, but salt rock caverns are subject to specific geographical conditions and regional geological conditions, and are difficult to popularize on a large scale. Artificially lined underground hard rock air storage caverns mainly rely on the huge restraining force of artificially excavated underground hard rock caverns to resist the internal pressure of the air storage, and at the same time, a thin lining is applied to the inner surface to play a sealing role. The common lining forms are steel plate-concrete or rubber-concrete, but there are no large-scale practical cases. Due to the less influence of geographical factors, suitable hard rock strata can be selected for construction based on engineering geological exploration results, and air storage parameters can be designed and adapted.

[0004] Currently, the design and selection of rock-lined underground air storage caverns mainly include tunnel type and warehouse type. The tunnel type has a small cross-sectional size (generally 10-20m), resulting in a large inner surface lining area; the warehouse type air storage cavern is in the form of a spatial warehouse, which has a large spatial volume (the diameter can reach 50m and the height can reach 100m), and the inner surface area is small under the same volume, and the lining cost is lower. Therefore, under the requirement of lower construction cost, the warehouse type air storage cavern becomes a better choice. The lining construction of the tunnel type underground cavern is relatively convenient and easy for steel plate welding construction, which can refer to the construction method of the hydraulic tunnel. However, there is no reference for the warehouse type underground cavern. Therefore, how to solve the process technology and control the construction quality of the super-high facade steel plate lining construction has become a problem to be solved. SUMMARY

[0005] The application aims to provide a combined hanging basket and method for installation of steel plates of a subterranean silo type gas storage chamber.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0007] The combined hanging basket for installation of steel plates of a subterranean silo type gas storage chamber comprises an outer ring hanging basket assembly, a center hanging basket assembly and a suspension assembly.

[0008] The suspension assembly is installed in a horizontal passage of a vertical shaft at the top of the subterranean silo type gas storage chamber and serves as a force bearing component for suspension of the outer ring hanging basket assembly and the center hanging basket assembly.

[0009] The outer ring hanging basket assembly is tightly attached to the inner wall of the subterranean silo type gas storage chamber of a compressed air energy storage power station and serves to install the inner lining steel plates in the core tube area of the subterranean silo type gas storage chamber. The outer ring hanging basket assembly comprises a super large suspension platform and a heavy lifting machine. The super large suspension platform is connected with the suspension assembly through a steel wire rope. The super large suspension platform is tightly attached to the inner wall of the subterranean silo type gas storage chamber and serves as a working site for construction personnel during installation of the inner lining steel plates of the subterranean silo type gas storage chamber. The heavy lifting machine is installed on the super large suspension platform and serves as a power component for lifting of the outer ring hanging basket assembly.

[0010] The center hanging basket assembly is arranged on the central axis of the subterranean silo type gas storage chamber of the compressed air energy storage power station and serves to transport steel plate materials to the outer ring hanging basket assembly and install the inner lining steel plates in the dome area at the top of the subterranean silo type gas storage chamber. The center hanging basket assembly comprises a small suspension platform, a mine winch and a pulley. The small suspension platform is used as a material loading platform during installation of the inner lining steel plates of the subterranean silo type gas storage chamber and simultaneously carries construction personnel to conduct construction of the dome of the subterranean silo type gas storage chamber. The mine winch is installed in the horizontal passage beside the suspension assembly in the vertical shaft at the top of the subterranean silo type gas storage chamber and serves as a power component for operation of the center hanging basket assembly. The pulley is rotationally connected with the suspension assembly. The small suspension platform and the mine winch are connected with a steel wire rope. The steel wire rope is slidingly connected with the pulley.

[0011] The super large suspension platform and the small suspension platform are both connected with an electrical controller for control of electrical components for upward and downward movement of the super large suspension platform and the small suspension platform, respectively.

[0012] Further, the heavy lifting machine and the mine winch both adopt an electric lifting type structure.

[0013] Further, the heavy-duty hoist has twelve sets, which are equidistantly installed on the inner edge of the super-large suspension platform, the maximum lifting height of the twelve sets of heavy-duty hoist is not less than the height of the core tube in the warehouse-type gas storage chamber, and the maximum lifting load is not less than the sum of the weight of the super-large suspension platform and the maximum additional load; the steel wire rope connecting the super-large suspension platform and the suspension assembly also has twelve sets, which are high-strength and high-toughness hoisting steel wire ropes, the lower ends of the twelve sets of steel wire ropes are respectively connected with the twelve sets of heavy-duty hoists, and the upper ends of the twelve sets of steel wire ropes are locked and combined at the dome of the warehouse-type gas storage chamber by using a clamp sleeve.

[0014] Further, the electrical controller for controlling the synchronous switching of the twelve sets of heavy-duty hoists is provided in multiple places, which are respectively installed on the outer ring basket assembly and the lower part of the warehouse-type gas storage chamber, so as to realize multi-point control.

[0015] Further, the mine winch is provided with one set, the maximum lifting height of the mine winch is not less than the overall height of the warehouse-type gas storage chamber, and the maximum lifting load is not less than the sum of the weight of the small suspension platform and the maximum additional load.

[0016] Further, the steel wire rope connecting the small suspension platform and the mine winch includes a main rope and a basket matching rope; the main rope is arranged between the suspension assembly and the pulley to complete the turning connection; the basket matching rope has six sets, the lower ends of the six sets of basket matching ropes are equidistantly connected around the small suspension platform, the upper ends of the six sets of basket matching ropes are locked and combined at 2-3 m above the small suspension platform by using a clamp sleeve, and are connected with the main rope through a hook head.

[0017] Further, the super-large suspension platform and the small suspension platform each include high-low railings and a basket bottom, the high-low railings are used as a fence for the internal free surface and form a safe working space for construction personnel, and the basket bottom is a bottom structure of the super-large suspension platform and the small suspension platform, and is used to support working personnel and temporarily store construction materials and tools.

[0018] Further, the high-low railings include multiple high railings and low railings, the height of the high railing is 1.0-2.0 m, the height of the low railing is 0.5-1.0 m, and the multiple low railings are connected with inclined railings.

[0019] Further, the high railing, the low railing and the inclined railing are all hollow circular steel pipes, so as to reduce the overall weight of the outer ring basket assembly; the basket bottom is in the shape of a circular ring with a ring width of 1-2 m; the basket bottom is made of a low-density high-strength steel plate, and the density thereof is less than 7 g / cm 3 .

[0020] The use method of the combined hanging basket for the steel plate installation of the underground silo-type gas storage chamber comprises the following steps:

[0021] S1, according to the space size of the underground chamber and the construction demand, the overall size of the outer ring hanging basket assembly and the center hanging basket assembly is designed, and the maximum part size of the outer ring hanging basket assembly and the center hanging basket assembly is determined according to the transportation limit of the bottom inclined shaft of the underground chamber;

[0022] S2, after the core tube of the underground chamber is excavated and the secondary lining is completed, the hanging basket parts processed outside the chamber are transported to the bottom of the silo-type gas storage chamber through the bottom inclined shaft, and are spliced and assembled by means of manual electric welding;

[0023] S3, the suspension assembly and the mine winch are installed in the horizontal passage 8-12 m above the dome of the silo-type gas storage chamber, the I-beam and the winch are hoisted to the inside of the horizontal passage by the hoisting machinery at the top of the vertical shaft and are installed;

[0024] S4, the steel wire rope connected with the outer ring hanging basket assembly and the pulley of the center hanging basket assembly are installed at the suspension assembly, and the steel wire rope is connected with the outer ring hanging basket assembly and the center hanging basket assembly;

[0025] S5, after all the assembly procedures are completed, safety test is carried out for not less than one week, and the construction can be carried out after the safety test is passed;

[0026] S6, in the inner lining steel plate installation engineering, the construction procedure of "from top to bottom, dome first and then straight wall" is followed, when the inner lining steel plate at the dome is constructed, the center hanging basket assembly is mainly used as the construction operation platform, the outer ring hanging basket assembly is first loaded with a certain number of steel plates at the bottom, and then is lifted to the top of the core tube by means of the heavy lifting machine, and then the steel plate installation and welding at the top of the dome are completed by the construction workers by means of the center hanging basket assembly; for the construction far away from the central axis, the displacement is completed by using the cable-stayed principle;

[0027] S7, when the inner lining steel plate at the vertical surface of the core tube is constructed, the outer ring hanging basket assembly is mainly used as the construction operation platform, and the center hanging basket assembly is used as a material transportation tool; in order to improve the construction efficiency, multiple operation points can be set at intervals for simultaneous construction;

[0028] S8, after the installation is completed, the outer ring hanging basket assembly and the center hanging basket assembly are reserved inside the underground chamber for later maintenance and use.

[0029] The beneficial effects of the technical scheme are:

[0030] The application provides a combined hanging basket and method for underground silo type gas storage chamber steel plate installation, which can provide a new method with high work efficiency and reliable construction quality for the installation of the lining steel plate of the underground silo type large space gas storage chamber of a compressed air energy storage power station, and can obviously shorten the construction period compared with a traditional scaffold construction method; meanwhile, the application occupies a small construction space, avoids a post-construction disassembly process, and provides a more convenient method for the maintenance and repair of the steel plate in the later operation stage. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the combined hanging basket for underground silo type gas storage chamber steel plate installation according to the application;

[0032] Figure 2 It is a structural schematic diagram of the outer ring hanging basket assembly of the combined hanging basket for underground silo type gas storage chamber steel plate installation according to the application;

[0033] Figure 3 It is a structural schematic diagram of the center hanging basket assembly of the combined hanging basket for underground silo type gas storage chamber steel plate installation according to the application;

[0034] Figure 4 It is a front view of the overall structure of the combined hanging basket for underground silo type gas storage chamber steel plate installation according to the application;

[0035] Figure 5 It is a top view of the overall structure of the combined hanging basket for underground silo type gas storage chamber steel plate installation according to the application;

[0036] Figure 6 It is a front view of the position of the suspension assembly of the combined hanging basket for underground silo type gas storage chamber steel plate installation according to the application;

[0037] The names of the corresponding marks in the drawings are:

[0038] Silo type gas storage chamber 1, shaft 2, inclined shaft 3, horizontal passage 4, outer ring hanging basket assembly 5, center hanging basket assembly 6, super large suspension platform 7, heavy lifting machine 8, suspension assembly 9, steel wire rope 10, electrical controller 11, small suspension platform 12, mine winch 13, pulley 14, high-low barrier 15, basket bottom 16, hook head 17, main rope 18, hanging basket rope 19. DETAILED DESCRIPTION

[0039] The application will be further described in detail below in combination with the drawings and embodiments:

[0040] As shown in Figures 1 to 6 The combined hanging basket for underground silo type gas storage chamber steel plate installation includes an outer ring hanging basket assembly 5, a center hanging basket assembly 6 and a suspension assembly 9.

[0041] The suspension assembly 9 is installed in the horizontal passage 4 of the shaft 2 on the top of the cylindrical gas storage chamber 1, and is used as a force bearing member for suspending the outer ring basket assembly 5 and the central basket assembly 6;

[0042] The outer ring basket assembly 5 is closely attached to the inner wall of the underground cylindrical gas storage chamber 1 of the compressed air energy storage power station, and is used for installing the inner lining steel plate in the core tube area of the middle part of the cylindrical gas storage chamber 1. The outer ring basket assembly 5 comprises a super large suspension platform 7 and twelve heavy lifting machines 8. The super large suspension platform 7 is connected with the suspension assembly 9 through a steel wire rope 10, and is closely attached to the inner wall of the cylindrical gas storage chamber 1, and is used as a working site for the construction personnel during the installation of the lining steel plate in the cylindrical gas storage chamber 1. The twelve heavy lifting machines 8 are installed equidistantly on the inner edge of the super large suspension platform 7, and are used as power components during the lifting of the outer ring basket assembly 5. The twelve heavy lifting machines 8 are all electric lifting type structures. The maximum lifting height of the twelve heavy lifting machines 8 is not less than the height of the core tube in the middle part of the cylindrical gas storage chamber 1, and the maximum lifting load is not less than the sum of the weight of the super large suspension platform 7 and the maximum additional load. The steel wire rope 10 connecting the super large suspension platform 7 and the suspension assembly 9 is also provided with twelve groups. The twelve groups of steel wire ropes 10 are all high-strength and high-toughness hoisting steel wire ropes. The lower ends of the twelve groups of steel wire ropes 10 are respectively connected with the twelve heavy lifting machines 8, and the upper ends of the twelve groups of steel wire ropes 10 are locked and combined at the dome of the cylindrical gas storage chamber 1 by using a clamp sleeve.

[0043] The center basket assembly 6 is arranged on the central axis of the underground cylindrical gas storage chamber 1 of the compressed air energy storage power station, and is used to transport steel plates to the outer ring basket assembly 5 and install the inner lining steel plates of the dome area at the top of the cylindrical gas storage chamber 1. The center basket assembly 6 includes a small suspended platform 12, a pulley 14 and a mine winch 13. The small suspended platform 12 is used as a loading platform for materials during the installation of the lining steel plates of the cylindrical gas storage chamber 1, and simultaneously carries construction personnel to carry out the construction of the dome of the cylindrical gas storage chamber 1. The mine winch 13 adopts an electric lifting structure, and is installed in the horizontal passage 4 beside the suspension assembly 9 in the vertical shaft 2 at the top of the cylindrical gas storage chamber 1. The mine winch 13 is used as a power component for the operation of the center basket assembly 6. The maximum lifting height of the mine winch 13 is not less than the overall height of the cylindrical gas storage chamber 1, and the maximum lifting load is not less than the sum of the weight of the small suspended platform 12 and the maximum additional load. The pulley 14 is rotationally connected with the suspension assembly 9. The small suspended platform 12 and the mine winch 13 are connected by a steel wire rope 10. The steel wire rope 10 is slidingly connected with the pulley 14. The steel wire rope 10 connecting the small suspended platform 12 and the mine winch 13 includes a main rope 18 and basket matching ropes 19. The main rope 18 is arranged between the suspension assembly 9 and the pulley 14 to complete the turning connection. The basket matching ropes 19 are six groups. The lower ends of the six groups of basket matching ropes 19 are respectively connected at equal distances around the small suspended platform 12. The upper ends of the six groups of basket matching ropes 19 are locked and combined at 2.5 m above the small suspended platform 12 by a clamp sleeve, and are connected with the main rope 18 through a hook 17.

[0044] The super large suspended platform 7 and the small suspended platform 12 both include high-low railings 15 and a basket bottom 16. The high-low railings 15 are used to enclose the internal free surface and form a safe working space for the construction personnel. The high-low railings 15 include a plurality of high railings and low railings. The height of the high railings is 1.5 m, and the height of the low railings is 0.75 m. The plurality of low railings are connected with inclined railings. The high railings, the low railings and the inclined railings are all hollow circular steel pipes, so as to reduce the overall weight of the outer ring basket assembly 5. The basket bottom 16 is a bottom structure of the super large suspended platform 7 and the small suspended platform 12, and is used to support the working personnel and temporarily stack the construction materials and tools. The basket bottom 16 is in the shape of a circular ring with a ring width of 1.5 m. The basket bottom 16 is made of a low-density high-strength steel plate, and the density is less than 7 g / cm 3 . The super large suspended platform 7 and the small suspended platform 12 are both connected with an electrical controller 11, which is respectively used for controlling the electrical components of the super large suspended platform 7 and the small suspended platform. There are multiple electrical controllers 11 for controlling the synchronous switches of the twelve heavy-duty hoists 8, which are respectively installed on the outer ring basket assembly 5 and the lower part of the cylindrical gas storage chamber 1, so as to realize multi-point control.

[0045] The use method of the combined basket for the installation of the steel plates of the underground cylindrical gas storage chamber includes the following steps:

[0046] S1, according to the spatial size of the underground chamber and the construction demand, the overall size of the outer ring basket assembly 5 and the center basket assembly 6 is designed comprehensively, and the maximum part size of the outer ring basket assembly 5 and the center basket assembly 6 is determined according to the transportation limit of the underground chamber bottom inclined shaft 3;

[0047] S2, after the underground chamber core tube is excavated and the secondary lining is completed, the basket parts processed outside the chamber are transported to the bottom of the warehouse cylinder type gas storage chamber 1 through the bottom inclined shaft 3, and are spliced and assembled by manual electric welding;

[0048] S3, the suspension assembly 9 and the mine winch 13 are installed in the horizontal passage 4 10m above the dome of the warehouse cylinder type gas storage chamber 1, and the I-beam and the winch are hoisted to the inside of the horizontal passage 4 by the hoisting machinery at the top of the vertical shaft 2 and are installed;

[0049] S4, the steel wire rope 10 connected with the outer ring basket assembly 5 and the pulley 14 of the center basket assembly 6 are installed at the suspension assembly 9, and the steel wire rope 10 is connected with the outer ring basket assembly 5 and the center basket assembly 6;

[0050] S5, after all the assembly procedures are completed, safety test is carried out for not less than one week, and after the safety test is passed, the construction can be put into operation;

[0051] S6, in the inner lining steel plate installation engineering, the construction procedure of "from top to bottom, dome first and straight wall later" is followed, when the inner lining steel plate at the dome is constructed, the center basket assembly 6 is mainly used as the construction operation platform, the outer ring basket assembly 5 is first loaded with a certain number of steel plates at the bottom, and then is lifted to the top of the core tube by means of the heavy lifting machine 8, and then the construction workers complete the steel plate installation and welding of the top dome by means of the center basket assembly 6; for the construction far away from the center axis, the displacement is completed by using the cable-stayed principle;

[0052] S7, when the inner lining steel plate at the core tube facade is constructed, the outer ring basket assembly 5 is mainly used as the construction operation platform, and the center basket assembly 6 is used as a material transportation tool; in order to improve the construction efficiency, multiple operation points can be set segmentally for simultaneous construction;

[0053] S8, after the installation is completed, the outer ring basket assembly 5 and the center basket assembly 6 are reserved inside the underground chamber for later maintenance.

[0054] The above-mentioned are only embodiments of the present application, and common technical solutions or common knowledge in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the patent. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A combined suspended platform for installing steel plates in underground silo-type gas storage chambers, characterized in that: Includes the outer ring suspended platform assembly, the central suspended platform assembly, and the suspension assembly; The suspension assembly is installed in the horizontal passage of the vertical shaft at the top of the silo-type gas storage chamber, and serves as a load-bearing component for suspending the outer ring basket assembly and the central basket assembly. The outer ring suspended platform assembly is closely attached to the inner wall of the underground silo-type gas storage chamber of the compressed gas storage power station, and is used to install the inner lining steel plate of the core tube area in the middle of the silo-type gas storage chamber. The outer ring suspended platform assembly includes an ultra-large suspended platform and a heavy-duty hoist. The ultra-large suspended platform is connected to the suspension assembly by steel wire rope. The ultra-large suspended platform is closely attached to the inner wall of the silo-type gas storage chamber and serves as the working area for construction personnel during the installation of the inner lining steel plate of the silo-type gas storage chamber. The heavy-duty hoist is installed on the ultra-large suspended platform and serves as the power component used for lifting the outer ring suspended platform assembly. The central suspended platform assembly is located on the central axis of the underground silo-type gas storage chamber of the compressed gas storage power station. It is used to transport steel plate materials to the outer ring suspended platform assembly and to install the inner lining steel plates in the dome area of ​​the silo-type gas storage chamber. The central suspended platform assembly includes a small suspended platform, a mining winch, and pulleys. The small suspended platform is used as a loading platform for materials during the installation of the inner lining steel plates of the silo-type gas storage chamber, and also carries construction personnel to carry out the construction of the dome of the silo-type gas storage chamber. The mining winch is installed in the horizontal passage next to the suspension assembly in the vertical shaft at the top of the silo-type gas storage chamber, and is used as the power component for the operation of the central suspended platform assembly. The pulleys are rotatably connected to the suspension assembly, and the small suspended platform is connected to the mining winch by a steel wire rope, which is slidably connected to the pulleys. Both the ultra-large suspension platform and the small suspension platform are connected to electrical controllers, which are used to control the electrical components that move up and down on the ultra-large suspension platform and the small suspension platform, respectively.

2. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 1, characterized in that: Both the heavy-duty hoist and the mining winch adopt an electric hoisting structure.

3. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 1, characterized in that: There are twelve heavy-duty hoists, which are equidistantly installed on the inner edge of the ultra-large suspended platform. The maximum lifting height of the twelve heavy-duty hoists is not less than the height of the core tube in the middle of the silo-type gas storage chamber, and the maximum lifting load is not less than the sum of the weight of the ultra-large suspended platform and the maximum additional load. There are also twelve sets of steel wire ropes connecting the ultra-large suspended platform and the suspension components. All twelve sets of steel wire ropes are high-strength and high-toughness lifting steel wire ropes. The lower ends of the twelve sets of steel wire ropes are respectively connected to the twelve heavy-duty hoists, and the upper ends of the twelve sets of steel wire ropes are locked together in the dome of the silo-type gas storage chamber using clamp sleeves.

4. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 3, characterized in that: The electrical controller for controlling the synchronous switches of the twelve heavy-duty hoists is provided in multiple locations, respectively installed on the outer ring basket assembly and the lower part of the silo-type gas storage chamber, to achieve multi-point control.

5. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 1, characterized in that: One mining winch is provided. The maximum lifting height of the mining winch is not less than the overall height of the silo-type gas storage chamber, and the maximum lifting load is not less than the sum of the weight of the small suspension platform and the maximum additional load.

6. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 5, characterized in that: The wire rope connecting the small suspended platform and the mining winch includes a main rope and a basket rope; the main rope is located between the suspension assembly and the pulley to complete the turning connection; there are six sets of basket ropes, the lower ends of the six sets of basket ropes are connected at equal intervals around the small suspended platform, and the upper ends of the six sets of basket ropes are locked together with clamp sleeves 2-3m above the small suspended platform and connected to the main rope through hooks.

7. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 1, characterized in that: Both the super-large suspended platform and the small suspended platform include high and low railings and a basket bottom. The high and low railings serve as the open surface inside the enclosure and form a safe working space for construction workers. The basket bottom is the bottom structure of the super-large suspended platform and the small suspended platform, used to support workers and temporarily store construction materials and tools.

8. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 7, characterized in that: The high and low railings include multiple high railings and low railings. The height of the high railings is 1.0~2.0m, and the height of the low railings is 0.5~1.0m. The multiple low railings are connected by diagonal railings.

9. The combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to claim 8, characterized in that: The high railing, the low railing, and the diagonal railing are all hollow circular steel pipes to reduce the overall weight of the outer ring suspended basket assembly; the basket bottom is circular, with a ring width of 1-2m; the basket bottom is made of low-density high-strength steel plate with a density of less than 7g / cm³. 3 .

10. The method of using the combined suspended platform for installing steel plates in underground silo-type gas storage chambers according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Based on the spatial dimensions and construction requirements of the underground chamber, design the overall dimensions of the outer ring suspended platform assembly and the central suspended platform assembly. At the same time, determine the maximum component dimensions of the outer ring suspended platform assembly and the central suspended platform assembly based on the transportation clearance of the inclined shaft at the bottom of the underground chamber. S2. After the excavation and secondary lining of the core tube of the underground chamber are completed, the basket components processed outside the chamber are transported to the bottom of the silo-type gas storage chamber through the bottom inclined shaft and assembled by manual electric welding. S3. Install the suspension components and mine winch in the transverse passage 8-12m above the dome of the silo-type gas storage chamber. Use the hoisting machinery at the top of the shaft to hoist the I-beam crossbeam and the winch into the transverse passage and install them. S4. Install the wire rope connecting the outer ring suspended platform assembly and the pulley of the central suspended platform assembly at the suspension assembly, and connect the wire rope to the outer ring suspended platform assembly and the central suspended platform assembly. S5. After all assembly processes are completed, a safety test shall be conducted for no less than one week. Construction can only begin after the safety test is passed. S6. In the installation of the inner steel lining plate, the construction procedure of "from top to bottom, dome first, then straight wall" is followed. When installing the inner steel lining plate at the dome, the central suspended platform is mainly used as the construction work platform. The outer ring suspended platform first loads a certain number of steel plates at the bottom and lifts them to the top of the core tube with the help of a heavy hoist. Then, the construction workers use the central suspended platform to complete the installation and welding of the steel plates at the top of the dome. For construction at locations far from the central axis, the diagonal tension principle is used to complete the displacement. S7. When lining the core tube facade with steel plates, the outer ring suspended platform is mainly used as the construction work platform, and the central suspended platform is used as the material transport tool. To improve construction efficiency, multiple work points can be set up in sections for simultaneous construction. S8. After installation, the outer ring suspended platform assembly and the central suspended platform assembly are retained inside the underground chamber for future maintenance.

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