Working platform inside metal container and construction method thereof

Abstract

The working platform in the metal container comprises a storage tank and a lower base, a tank opening is formed in the storage tank, the lower base is installed in the center of the interior of the storage tank, a lifting platform is installed on the lower base, and the lifting platform comprises a lower swing mechanism; the invention further discloses a construction method of the working platform in the metal container. The construction method comprises the following steps that S1, the platform is assembled; s2, platform inspection and acceptance; s3, weld joint rust removal operation and acceptance inspection are carried out; s4, paint brushing construction is conducted; s5, quality inspection is conducted on paint on the inner wall plate of the can; s6, the top plate in the tank is subjected to rust removal and paint brushing; s7, quality inspection is conducted on the tank top plate paint; and S8, the platform is dismantled. The method has the advantages that the operation time can be accurately calculated, the requirement for the construction progress can be met, meanwhile, the safety risk of the operation platform is low, the operation safety is further improved, the construction precision is improved, the quality problem is reduced, and the construction cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of working platforms, and in particular to a working platform inside a metal container and a construction method thereof. Background Art

[0002] In the traditional construction of metal containers (such as large storage tanks), rust removal and anti-corrosion operations are usually carried out by setting up a full-length scaffolding inside the tank. However, this traditional construction process has many disadvantages.

[0003] On the one hand, the construction process of full-floor scaffolding is costly. Building and dismantling scaffolding requires a lot of manpower, material resources and time costs, including the purchase, transportation and installation costs of scaffolding materials. At the same time, the rental cost of scaffolding also increases the overall cost of the project. On the other hand, working at heights is risky. Construction workers working on full-floor scaffolding face a significant risk of falling from heights. Accidents are also prone to occur during the process of climbing up and down the scaffolding, posing a serious threat to the life safety of construction workers. In addition, the scaffolding erection and dismantling cycle is long. It takes a long time to build a full-floor scaffolding, which affects the construction progress. After the construction is completed, it also takes a lot of time to dismantle the scaffolding, further delaying the overall progress of the project.

[0004] With the continuous improvement of site safety and quality requirements and the acceleration of construction progress, traditional construction technology can no longer meet actual needs. In order to solve these problems, a safer, more efficient and economical construction method is urgently needed. In this context, a metal container internal operation platform was developed to improve construction efficiency, reduce costs, reduce safety risks, and provide a better solution for rust removal and corrosion prevention inside metal containers. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose an internal working platform for a metal container and a construction method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A metal container internal working platform, comprising a storage tank and a lower base, wherein the storage tank is provided with a tank opening, the lower base is installed at the center of the storage tank, a lifting platform is installed on the lower base, the lifting platform comprises a lower slewing mechanism, a plurality of column standard sections are installed on the upper end of the lower slewing mechanism, a sliding mechanism is slidably connected to the column standard section, an anti-falling safety device is installed on the sliding mechanism, a support arm is installed on the sliding mechanism through a support arm connector, manned baskets are installed at both ends of the support arm, a tank top fixing shaft is installed on the uppermost column standard section through an upper slewing mechanism, and an upper pulley block is symmetrically installed on the lower part of the upper slewing mechanism;

[0008] An upper hoisting frame is installed at the upper end of the storage tank, and the upper hoisting frame is erected on the tank mouth. A frame beam is horizontally installed on the upper hoisting frame, and an upper hoist is installed on the frame beam.

[0009] In the above-mentioned metal container internal working platform, guardrails and guardrails are installed on the support arms, and a plurality of pull ropes are installed between the guardrails and the sliding mechanism.

[0010] In the above-mentioned internal working platform of the metal container, a limit switch is installed between the upper slewing mechanism and the standard section of the column connected thereto.

[0011] In the above-mentioned internal working platform of the metal container, the upper end of the lower base is symmetrically rotatably connected to multiple legs, the lower end of each leg is rotatably connected to a ground plate, and the middle part of each leg is rotatably connected to the lower base with a tensioning screw.

[0012] In the above-mentioned internal working platform of the metal container, a lower winch mounting seat is installed on the side wall of the lower base, an inclined support rod is obliquely arranged between the lower winch mounting seat and the lower base, a lower winch is installed on the lower winch mounting seat, and a guide rope wheel is installed on the lower base.

[0013] In the above-mentioned internal working platform of the metal container, the sliding mechanism includes four symmetrically arranged connecting bars, and the four connecting bars are fastened by bolts. Each of the connecting bars is equipped with multiple holding wheels, and the upper ends of the connecting bars are equipped with sliding mechanism wheels, and the side walls of the connecting bars are equipped with pull rope connecting plates.

[0014] In the above-mentioned internal working platform of the metal container, the steel wire rope wound on the lower winch passes through the guide rope wheel in sequence, rises from the column to the upper pulley block for rope arrangement, and is then installed on the sliding mechanism wheel.

[0015] A construction method for an internal working platform of a metal container comprises the following steps:

[0016] S1, platform assembly;

[0017] S2. Platform inspection and acceptance: After the platform is assembled and debugged, a dedicated person will conduct a comprehensive inspection and acceptance of the reliability of the connection of the platform components, the flexibility of the sliding mechanism, the operation of the wire rope, the sensitivity of the limit switch, the installation angle of the anti-fall safety device, etc. to ensure that the platform meets the safety and use requirements;

[0018] S3. Weld rust removal and acceptance: Use manual tools to remove rust from the welds on the inner wall of the tank. During the rust removal process, strictly follow the rust removal requirements to ensure the quality of rust removal;

[0019] S4. Paint painting: After the weld rust removal is accepted, paint painting is carried out. If the paint is found to be gelled or agglomerated during the construction process, it should be stopped. The construction personnel can reach various positions in the tank using the lifting platform to paint evenly to ensure that the coating thickness meets the design requirements.

[0020] S5. Perform a quality inspection on the paint on the inner wall of the tank; perform a comprehensive quality inspection on the paint coating on the inner wall of the tank to ensure that the paint quality on the inner wall of the tank meets the requirements and provide effective protection for the corrosion protection of the storage tank;

[0021] S6. Remove rust and paint the top plate inside the tank. According to the same requirements and steps as the rust removal and paint painting of the welds on the inner wall of the tank, remove rust and paint the top plate inside the tank. The paint selection and painting process shall comply with the standard specifications to provide good anti-corrosion protection for the top plate inside the tank.

[0022] S7. Perform quality inspection on the paint on the tank top plate. Similar to the quality inspection on the paint on the inner wall of the tank, perform quality inspection on the paint coating on the tank top plate to ensure that the paint quality on the tank top plate meets the requirements and is free of defects and problems.

[0023] S8. Dismantle the platform. After all the construction inside the tank is completed and the quality acceptance is qualified, the platform will be dismantled.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The operation time can be accurately calculated to ensure that the construction progress requirements are met. Compared with the traditional full-floor scaffolding construction, the assembly and operation of this work platform is more efficient, which can effectively shorten the construction period. The platform parts are lighter, and the assembly and disassembly time is short, which greatly speeds up the construction progress. Construction workers do not need to spend a lot of time to build and dismantle scaffolding, and can quickly engage in rust removal and anti-corrosion operations.

[0026] 2. The working platform has low safety risks and is equipped with an anti-fall safety device, which can effectively protect the safety of construction workers in the event of an accident. At the same time, the various components of the platform are firmly connected and have undergone strict safety inspections and acceptance, which reduces the risk of working at heights. Construction workers control the operation of the lifting platform on the platform and do not need to climb up and down the scaffolding, reducing the risk of falling from heights caused by climbing. In addition, safety facilities such as guardrails are installed on the platform to further improve the safety of operations.

[0027] 3. The personnel control the operation of the lifting platform on the platform, which can operate in the full range, with a wide range of construction operations, and can better control the quality of rust removal and anti-corrosion. Construction personnel can more easily reach various positions inside the metal container, and perform uniform and meticulous rust removal and anti-corrosion operations to ensure that the construction quality meets the standard requirements. The platform runs smoothly, and construction personnel work more stably in the manned basket, which is conducive to improving construction accuracy and reducing the occurrence of quality problems.

[0028] 4. Reusable and low construction cost. Compared with the one-time full-floor scaffolding, the work platform can be reused in multiple projects, reducing the equipment investment cost, saving manpower, material resources, scaffolding usage and rental fees, greatly reducing construction costs, which is beneficial to project cost management, reducing the demand for a large amount of scaffolding materials and manpower, and reducing the costs of material procurement, transportation and rental.

[0029] In summary, the present invention can accurately calculate the operation time to ensure that the construction progress requirements are met. At the same time, the safety risk of the operation platform is low, which further improves the safety of the operation, is conducive to improving construction accuracy, reducing the occurrence of quality problems, and effectively reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural schematic diagram of a metal container internal working platform and its construction method proposed by the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of an internal working platform of a metal container proposed by the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of a sliding mechanism in an internal working platform of a metal container proposed by the present invention;

[0033] Figure 4 This is an enlarged view of the structure of the lower base portion of a metal container internal working platform proposed by the present invention;

[0034] Figure 5 A schematic diagram of a steel wire rope arrangement for a construction method of an internal working platform of a metal container proposed by the present invention;

[0035] Figure 6 The present invention provides a construction process flow chart of a method for constructing an internal working platform of a metal container.

[0036] In the figure: 1 storage tank, 2 lower base, 3 tank mouth, 4 upper winch frame, 5 frame beam, 6 upper winch, 7 lower slewing mechanism, 8 column standard section, 9 sliding mechanism, 901 connecting rail, 902 holding wheel, 903 sliding mechanism wheel, 904 pull rope connecting plate, 10 support arm connector, 11 support arm, 12 manned basket, 13 upper slewing mechanism, 14 tank top fixed shaft, 15 guardrail, 16 guardrail, 17 limit switch, 18 support leg, 19 anchor plate, 20 tensioning screw, 21 lower winch mounting seat, 22 lower winch, 23 upper pulley block, 24 pull rope. DETAILED DESCRIPTION

[0037] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0038] Example

[0039] refer to Figure 1-5 A metal container internal working platform comprises a storage tank 1 and a lower base 2. The storage tank 1 is provided with a tank mouth 3. The lower base 2 is installed at the center position inside the storage tank 1. The upper end of the lower base 2 is symmetrically rotatably connected to a plurality of legs 18. The lower end of each leg 18 is rotatably connected to a ground anchor plate 19. A tensioning screw 20 is rotatably connected between the middle part of each leg 18 and the lower base 2. A lower winch mounting seat 21 is installed on the side wall of the lower base 2. An inclined support rod is obliquely arranged between the lower winch mounting seat 21 and the lower base 2. A lower winch 22 is installed on the lower winch mounting seat 21, and a guide rope wheel is installed on the lower base 2.

[0040] A lifting platform is installed on the lower base 2, and the lifting platform includes a lower slewing mechanism 7. A plurality of column standard sections 8 are installed on the upper end of the lower slewing mechanism 7. A sliding mechanism 9 is slidably connected to the column standard section 8. An anti-fall safety device is installed on the sliding mechanism 9. The sliding mechanism 9 includes four symmetrically arranged connecting bars 901, and the four connecting bars 901 are fastened by bolts. A plurality of holding wheels 902 are installed on each connecting bar 901. A pair of sliding mechanism wheels 903 are installed on the upper ends of the connecting bars 901, and a pull rope connecting plate 904 is installed on the side wall of the connecting bar 901.

[0041] The sliding mechanism 9 is provided with a support arm 11 through a support arm connector 10, and a guardrail 15 and a guardrail 16 are provided on the support arm 11. A plurality of pull ropes 24 are provided between the guardrail 15 and the sliding mechanism 9, and the pull ropes 24 are fixed on a pull rope connecting plate 904. Both ends of the support arm 11 are provided with a manned basket 12. A tank top fixed shaft 14 is provided on the uppermost column standard section 8 through an upper slewing mechanism 13. A limit switch 17 is provided between the upper slewing mechanism 13 and the column standard section 8 connected thereto. An upper pulley block 23 is symmetrically provided at the lower part of the upper slewing mechanism 13. The steel wire rope wound on the lower winch 22 passes through the guide rope wheel in sequence, rises from the column to the upper pulley block 23 for arranging the rope, and is then provided on the sliding mechanism wheel 903.

[0042] An upper hoisting frame 4 is installed at the upper end of the storage tank 1 , and the upper hoisting frame 4 is erected on the tank mouth 3 , a frame beam 5 is horizontally installed on the upper hoisting frame 4 , and an upper hoist 6 is installed on the frame beam 5 .

[0043] Reference Figure 1-6 , a construction method for an internal working platform of a metal container, comprising the following steps;

[0044] S1. Platform assembly:

[0045] The platform assembly process includes the following steps:

[0046] Step 1: Positioning and measurement; Position from the top of the tank, mark the vertical position of the top of the tank on the bottom of the tank, ensure the verticality of the column after installation, measure the height from the bottom of the tank to the top of the tank and the circumference of the inner wall of the tank, and determine the error size.

[0047] Step 2: Install the winch and fixed shaft; connect the upper winch frame 4 and the frame beam 5 to the tank top opening 3, fasten them with bolts, lay square wood under the upper winch frame 4 to reduce the bearing pressure on the tank top, install the upper winch 6 on the lifting hole of the frame beam 5, fasten it with bolts, use the upper winch 6 wire rope to pass the tank top opening 3 down to the bottom of the storage tank 1, connect the hook to the tank top fixed shaft 14 and fix it firmly, install the upper limit bracket on one side of the tank top fixed shaft 14, and The wire rope is tied to the upper limit bracket with a rope buckle, and then the lower end of the wire rope is hung down, and the upper end can rise with the lifting of the winch.

[0048] Step 3, install the column standard section 8; use the upper winch 6 to lift the tank top fixed shaft 14. After it exceeds the height of one column standard section 8, move the column standard section 8 and place it directly below, lower the tank top fixed shaft 14 to align the bolt holes and the joint holes, and tighten them with bolts; repeat the installation of the column standard section 8 and the adjustment section, and reserve one standard section to ensure that the lowest end is not less than 2.5m from the ground after the overall lifting.

[0049] Step 4, install the sliding mechanism 9 and accessories; install the sliding mechanism 9, connecting bar 901, rope connecting plate 904 and other accessories completely, fasten them with bolts, and be sure to add gaskets before inserting the bolts; insert the anti-fall safety device into the corresponding seamless pipe according to the installation requirements and raise it to more than 2.5m; place the assembled sliding mechanism 9 just below the tank mouth 3 and align it, pay attention to the installation direction, so that the side with the U-shaped steel bar is aligned with the Install the wire rope on the same side, slowly lower the column, and insert the column into the sliding mechanism 9. Note that when lowering, the four seamless tubes of the column must be placed in the holding wheel 902 of the sliding mechanism 9, and they cannot be derailed. Use a crowbar to penetrate the empty frame of the sliding mechanism 9 and the column, temporarily connect the sliding mechanism 9 and the column together, and the lower end of the sliding mechanism 9 is about 20 cm higher than the lower end of the column.

[0050] Step 5, install the remaining columns and the lower base 2; install the remaining column standard sections 8 and the column adjustment sections completely. During the installation process, attention must be paid to the verticality of the entire column. Then lift the entire column to a position exceeding 1.7m and stop. Place the lower base 2 directly under the column, then lower the column and align it with the connecting hole. When the column contacts the lower base 2, observe the length of the tank top fixed axis 14 exposed from the tank mouth flange. It is best to keep it at 10-20cm. If the tank top fixed axis 14 cannot be exposed, it means that the column is too short, and it is necessary to add an adjustment section or lay square wood flat under the lower base 2 as a pad.

[0051] Connect and tighten the bolts of the column and the lower base 2, and then install the support leg 18, adjusting screw rod 20, anchor plate 19, lower winch frame 21, inclined support rod, and main winch 6 in place in turn. After the installation is completed, observe the overall verticality of the column. If there is a slight tilt, adjust the adjusting screw rod 20 under the support leg 18 to make fine adjustments. After the adjustment is completed, tighten all bolts.

[0052] Step 6: Fix the tank top fixing shaft 14; tighten the part of the tank top fixing shaft 14 extending out of the tank mouth flange with a special tank top fixing angle iron and fix it on the tank mouth flange with bolts, and then press the two tank top fixing angle irons with the tank top fixing pressure plate to prevent them from rotating or loosening. Note that the upper winch 6 must be in a tensioned state and then the brake is opened to prevent the column from sliding down as a whole, causing accidents or casualties.

[0053] Step 7: Install the wire rope and safety facilities; fix the safety rope at the tank mouth 3 and hang it down to the bottom of the tank, then follow the Figure 5 The wire rope of the lower hoist 22 is installed in the rope arrangement method shown. The wire rope is guided by the rope guide wheel and rises from the column to the upper pulley frame, and then the rope is arranged through the upper pulley block 23. Pay attention to the wire rope being in the middle of the pulley when arranging the rope, and it is strictly forbidden to use it out of the groove; when the installation personnel are pulling the rope, threading the rope, and arranging the rope at high altitude, they must use safety belts and safety ropes for construction, and it is strictly forbidden to carry out construction without safety facilities.

[0054] Step 8, adjust the sliding mechanism 9; control the lower winch 22 to work, take out the crowbar used in step 4, drop the sliding mechanism 9 to the bottom of the column, and then fix the anti-fall safety device on the sliding mechanism 9; check the reliability of the connection of each component, power on the machine, test the flexibility of the sliding mechanism 9 within a height range of 2m, and observe whether the gap between the sliding mechanism holding wheel 902 and the column seamless pipe is appropriate. If the gap is too large or too small, use a special wrench to adjust it to ensure that the gap between the wheel and the column is about 3mm. Check whether the main wire rope is stuck or the wheel is off during the operation of the winch.

[0055] Step nine, install other components; install the boom connection frame and the boom transition frame. During the installation process, all bolts must use flat washers. Connect the calculated and prepared arms 11 symmetrically to the boom transition frame in turn. Note that all connecting flanges must be connected reliably. A pull rope 16 must be installed for every two arms 11 to prevent the arm 11 from being too long and breaking in the middle. After all the arms 11 are installed, lock the pull rope 16 and tighten all bolts; install the construction fence as required, and all fence connecting bolts must be equipped with flat washers. If a single arm 11 is used, a counterweight of corresponding weight must be placed on the other end of the arm fence to keep the two ends of the arm 11 balanced.

[0056] Step 10: Install the guardrail 15 or guardrail; install the limit switch 17 and the bracket to the corresponding position of the base, tie the thin steel wire rope drooping in step 2 to the heavy hammer pressure plate of the limit switch 17, and appropriately increase the weight of the heavy hammer on the heavy hammer pressure plate so that the heavy hammer pressure plate can press the switch button of the limit switch 17 by its own weight, fix the top plate at the appropriate position of the upper end of the thin steel wire rope, ensure that the support arm 11 can be lifted to the highest position without collision, lift the support arm 11 to the highest position, and test the sensitivity and reliability of the limit switch 17. Repeat this action 3-5 times, and it must be ensured that the limit switch 17 is sensitive and reliable each time.

[0057] Step 11, platform debugging; during the lifting process of the arm 11, make rotation movements at the positions of 5m high, 10m high, 15m high, and 17.5m high respectively. It must be ensured that the end face of the arm 11 cannot rub, collide, or interfere with the tank wall. Make reciprocating movements 3-5 times at all heights in the tank. Experiment to see if the anti-fall device is stuck during the ascent and descent process. If it cannot descend smoothly and the anti-fall device is stuck, adjust the installation angle of the anti-fall device appropriately to make it a smooth transition. During the reciprocating operation, carefully observe whether the various parts of the equipment are loose, whether there is any abnormal sound, whether there is an obvious tilt at both ends of the arm 11, whether the control handle can be used to control it to stop immediately during ascent and descent, whether there is any sliding, and whether the winch and the electric control box have ignition and smoking and other abnormal phenomena.

[0058] S2. Platform inspection and acceptance: After the platform is assembled and debugged, a dedicated person will conduct a comprehensive inspection and acceptance of the reliability of the connection of each component of the platform, the flexibility of the sliding mechanism, the operation of the wire rope, the sensitivity of the limit switch, the installation angle of the anti-fall safety device, etc., to ensure that the platform meets the safety and use requirements. The inspection content includes but is not limited to: the verticality of the standard section 8 of the column, the connection reliability of the support arm 11, the installation firmness of the guardrail 15, the operating stability of the winch (main winch 6 and auxiliary winch), the electrical performance of the electric control box, etc. Only after passing the acceptance, the platform can be put into use.

[0059] S3. Weld rust removal and acceptance: Manual tool rust removal is performed on the weld position of the inner wall of the tank, which must reach St3 level. During the rust removal process, the rust removal requirements must be strictly followed to ensure the quality of rust removal. The surface temperature should be 3℃ higher than the dew point temperature and lower than 50℃ before construction can be carried out, and rust removal should be carried out during the day. After the rust removal is completed, a dedicated person will conduct an acceptance inspection to check whether the rust removal meets the standard requirements and ensure that there is no rust residue at the weld, providing a good foundation for the subsequent painting construction.

[0060] S4. Paint application: After the weld rust removal is accepted, paint application can be carried out. If the paint is found to be gelled or agglomerated during the construction process, it should be stopped. The painting interval should comply with the provisions in the product manual. If the painting interval exceeds the prescribed time, the coating surface should be treated, such as roughening, before the next coating can be applied. After spraying, the product mark should be transplanted to the surface of the component with an oil-based marker according to the steel stamp mark. Construction personnel can use the lifting platform in the tank to reach various positions for uniform painting to ensure that the coating thickness meets the design requirements, the surface should be smooth and traceless, the color should be consistent, and there should be no pinholes, bubbles, dripping, powdering and damage.

[0061] S5. Perform a quality inspection on the paint on the inner wall of the tank; perform a comprehensive quality inspection on the paint coating on the inner wall of the tank. The inspection content includes whether the coating thickness meets the design requirements, whether the surface is smooth and without marks, whether the color is consistent, and whether there are pinholes, bubbles, drips, powdering and damage. If it is found that the area does not reach the standard thickness, it must be re-sprayed. Ensure that the paint quality of the inner wall of the tank meets the requirements and provide effective protection for the corrosion protection of the storage tank.

[0062] S6. Remove rust and paint the top plate inside the tank; remove rust and paint the top plate inside the tank according to the same requirements and steps as the rust removal and paint painting of the welds on the inner wall of the tank. Ensure that the rust removal on the top plate surface reaches St3 level, and the construction is carried out under appropriate temperature and time conditions. The paint selection and painting process meet standard specifications to provide good anti-corrosion protection for the top plate inside the tank.

[0063] S7. Perform quality inspection on the paint on the tank top plate. Similar to the quality inspection on the paint on the inner wall of the tank, perform quality inspection on the paint coating on the tank top plate. Check the thickness, surface quality, color consistency, etc. of the paint coating on the top plate to ensure that the paint quality of the tank top plate meets the requirements and is free of defects and problems.

[0064] S8. Dismantle the platform. After all the construction inside the tank is completed and the quality inspection is qualified, the platform can be dismantled. The dismantling order is opposite to the installation order. First, dismantle the support arm 11, construction fence, guardrail 15 and other components, and then dismantle the limit switch 17, top plate and other accessories. Then dismantle the main winch wire rope and the auxiliary winch wire rope, release the connection between the tank top fixed shaft 14 and the tank mouth flange, and gradually dismantle the column standard section 8, sliding mechanism 9, lower base 2 and other components. During the dismantling process, pay attention to the safe dismantling of each component to avoid damage to the components and safety accidents. The dismantled components are sorted and stored for subsequent transportation and reuse.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A metal container internal working platform, comprising a storage tank (1) and a lower base (2), characterized in that: The storage tank (1) is provided with a tank opening (3), the lower base (2) is installed at the center position inside the storage tank (1), a lifting platform is installed on the lower base (2), the lifting platform comprises a lower slewing mechanism (7), a plurality of groups of column standard sections (8) are installed on the upper end of the lower slewing mechanism (7), a sliding mechanism (9) is slidably connected to the column standard section (8), an anti-fall safety device is installed on the sliding mechanism (9), a support arm (11) is installed on the sliding mechanism (9) through a support arm connector (10), a manned basket (12) is installed at both ends of the support arm (11), a tank top fixed shaft (14) is installed on the uppermost column standard section (8) through an upper slewing mechanism (13), and an upper pulley block (23) is symmetrically installed at the lower part of the upper slewing mechanism (13); An upper hoisting frame (4) is installed at the upper end of the storage tank (1), and the upper hoisting frame (4) is mounted on the tank mouth (3). A frame beam (5) is installed horizontally on the upper hoisting frame (4), and an upper hoist (6) is installed on the frame beam (5).

2. The metal container internal working platform according to claim 1, characterized in that: A guardrail rod (15) and a guardrail rod (16) are installed on the support arm (11), and a plurality of pull ropes (24) are installed between the guardrail rod (15) and the sliding mechanism (9).

3. The metal container internal working platform according to claim 1, characterized in that: A limit switch (17) is installed between the upper slewing mechanism (13) and the column standard section (8) connected thereto.

4. The metal container internal working platform and construction method thereof according to claim 1, characterized in that: The upper end of the lower base (2) is symmetrically rotatably connected to a plurality of legs (18), the lower end of each leg (18) is rotatably connected to a base plate (19), and the middle portion of each leg (18) is rotatably connected to a tensioning screw (20) between the lower base (2).

5. The metal container internal working platform according to claim 1, characterized in that: A lower hoist mounting seat (21) is mounted on the side wall of the lower base (2), an oblique support rod is obliquely arranged between the lower hoist mounting seat (21) and the lower base (2), a lower hoist (22) is mounted on the lower hoist mounting seat (21), and a guide rope wheel is mounted on the lower base (2).

6. The metal container internal working platform according to claim 5, characterized in that: The sliding mechanism (9) comprises four symmetrically arranged connecting bars (901), and the four connecting bars (901) are fastened by bolts, and each of the connecting bars (901) is installed with a plurality of holding wheels (902), and the upper ends of the connecting bars (901) are installed with sliding mechanism wheels (903), and the side walls of the connecting bars (901) are installed with pull rope connecting plates (904).

7. The metal container internal working platform according to claim 6, characterized in that: The steel wire rope wound on the lower hoist (22) passes through the guide rope wheel in sequence, rises from the column to the upper pulley block (23), is arranged, and is then installed on the sliding mechanism wheel (903).

8. The method for constructing an internal working platform of a metal container according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, platform assembly; S2. Platform inspection and acceptance: After the platform is assembled and debugged, a dedicated person will conduct a comprehensive inspection and acceptance of the reliability of the connection of the platform components, the flexibility of the sliding mechanism, the operation of the wire rope, the sensitivity of the limit switch, the installation angle of the anti-fall safety device, etc. to ensure that the platform meets the safety and use requirements; S3. Weld rust removal and acceptance: Use manual tools to remove rust from the welds on the inner wall of the tank. During the rust removal process, strictly follow the rust removal requirements to ensure the quality of rust removal; S4. Paint painting: After the weld rust removal is accepted, paint painting is carried out. If the paint is found to be gelled or agglomerated during the construction process, it should be stopped. The construction personnel can reach various positions in the tank using the lifting platform to paint evenly to ensure that the coating thickness meets the design requirements. S5. Perform a quality inspection on the paint on the inner wall of the tank; perform a comprehensive quality inspection on the paint coating on the inner wall of the tank to ensure that the paint quality on the inner wall of the tank meets the requirements and provide effective protection for the corrosion protection of the storage tank; S6. Remove rust and paint the top plate inside the tank. According to the same requirements and steps as the rust removal and paint painting of the welds on the inner wall of the tank, remove rust and paint the top plate inside the tank. The paint selection and painting process shall comply with the standard specifications to provide good anti-corrosion protection for the top plate inside the tank. S7. Perform quality inspection on the paint on the tank top plate. Similar to the quality inspection on the paint on the inner wall of the tank, perform quality inspection on the paint coating on the tank top plate to ensure that the paint quality on the tank top plate meets the requirements and is free of defects and problems. S8. Dismantle the platform. After all the construction inside the tank is completed and the quality acceptance is qualified, the platform will be dismantled.

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