Modular structure-based closed work cabin and method

Abstract

This invention relates to a modular, sealed work chamber and method. The work chamber includes a mobile trolley, a work chamber body mounted on the trolley, and an air purification component. The air purification component is used to purify the air inside the work chamber body. The work chamber body includes a base and a fixed frame. The fixed frame is mounted on the base and has an opening on the side facing the work area. The fixed frame is a square tube splicing structure, and its top and sides are retractable rods. The retractable rods extend perpendicularly to the opening side. The fixed frame is covered with a thickened film, and a roller shutter is provided on the open side of the fixed frame for closing the opening. Trumpet-shaped temporary sealing curtains that cooperate with GIL (Gas Inlet / Outlet) pipes are provided on the left and right sides of the fixed frame. Compared with the prior art, this invention has the advantages of rapid work chamber assembly and reusability based on structural fine-tuning.

Description

Technical Field

[0001] This invention relates to the field of high-voltage power transmission equipment installation technology, and in particular to a sealed operating chamber and method based on a modular structure. Background Technology

[0002] Gas-insulated metal-enclosed transmission lines (GILs) are a novel power transmission solution in the field of high-voltage power transmission. They employ a metal outer sheath, with a special insulating gas filling the space between the outer sheath and the internal conductive structure to reduce losses during transmission. The structure of a GIL pipe is similar to that of a regular steel pipe, using flanges for connection and bolts for secure fastening. During the installation of GIL pipes, high requirements are typically placed on the working environment to ensure the quality of the joints and insulation performance. Parameters such as the number of airborne particles, temperature, and humidity need to be controlled to prevent dust particles from affecting the insulation strength.

[0003] Existing enclosed work areas are typically constructed using scaffolding and temporary membrane structures. Specifically, a work shed frame is erected near the joint area using materials such as steel pipes. A temporary transparent membrane is then laid on the frame and sealed with tape, thus completing the construction of the enclosed work area. This type of temporary enclosed work area is suitable for ordinary GIL docking installations, especially in scenarios where the number of enclosed work areas required is small and the environment is relatively isolated.

[0004] However, this traditional temporary enclosed work area presents the following technical problems during its construction: First, scaffolding needs to be erected piece by piece, and the membrane needs to be laid and pasted piece by piece, making the entire construction process time-consuming. Second, the membrane material is usually damaged after dismantling and cannot be reused, resulting in material waste. Third, this solution lacks a lifting mechanism, requiring workers to climb scaffolding to reach higher positions. Furthermore, after completing one joint, the temporary work area needs to be completely dismantled and rebuilt at the next joint location, leading to lengthy relocation times. Finally, the sealing relies on adhesive tape, which has limited sealing effectiveness, and the lack of active air purification and environmental control devices makes it difficult to ensure that the air quality within the work area meets the high-precision environmental requirements for GIL docking.

[0005] In summary, the installation of GIL pipes within GIL tunnels, particularly the use of individual 12-18 meter long pipes, necessitates a large number of enclosed work chambers. Furthermore, the bolted connections limit the time required for each joint. Therefore, a type of enclosed work chamber is needed that can be quickly erected, reusable, equipped with an effective lifting mechanism, facilitates overall relocation, and effectively controls the working environment to meet the construction demands of large-scale GIL pipe installations within GIL tunnels. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology, such as the inconvenience of assembling the work cabin for GIL pipe docking and the fact that it is generally not reusable, and to provide a closed work cabin and method based on a modular structure.

[0007] The objective of this invention can be achieved through the following technical solutions: This solution provides a modular, enclosed work chamber, including a mobile trolley, a work chamber body, and an air purification component mounted on the mobile trolley. The air purification component is used to purify the air inside the work chamber body. The work chamber body includes a base and a fixed frame. The fixed frame is mounted on the base and has an opening on the side facing the work area. The fixed frame is a square tube splicing structure, and its top and sides are retractable rods. The retractable rods extend perpendicularly to the opening side. The fixed frame is covered with a thickened film, and a roller shutter is provided on the opening side of the fixed frame to close the opening. The left and right sides of the fixed frame are provided with horn-shaped temporary sealing curtains that cooperate with GIL pipes.

[0008] Furthermore, the splicing structure of the fixing frame includes an inner connecting square tube and an outer connecting square tube; The inner connecting square tube is inserted into the outer connecting square tube. The outer connecting square tube has a waist-shaped hole, and the inner connecting square tube has a threaded hole corresponding to the waist-shaped hole. The inner connecting square tube and the outer connecting square tube are connected by screws.

[0009] Furthermore, the telescopic rod includes an outer sleeve, an inner sleeve, and an electric telescopic rod; the inner sleeve is inserted inside the outer sleeve, the electric telescopic rod is located inside the outer sleeve, and one end of the electric telescopic rod is connected to the outer sleeve, and the other end is connected to the inner sleeve.

[0010] Furthermore, the base is equipped with supporting rollers at its bottom, the mobile trolley adopts a rail-guided trolley platform, the mobile trolley is equipped with a work cabin slide rail that cooperates with the supporting rollers, and the mobile trolley has a built-in battery module for powering the entire work cabin body.

[0011] Furthermore, the thickened film is fixed to the fixed frame with bolts, and after the GIL tube passes through the temporary sealing curtain, one end of the temporary sealing curtain is fixed to the fixed frame with Velcro, and the other end is fixed to the GIL tube with tape; the roller shutter is installed on the upper end of the open side of the fixed frame, and after the roller shutter is unfolded, the lower end of the roller shutter is fixed and sealed with Velcro.

[0012] Furthermore, the work cabin is equipped with a lifting mechanism, which is movably mounted on the base. The direction of movement of the lifting mechanism is parallel to the axis of the GIL tube, and the lifting mechanism is used to adjust the height of the personnel.

[0013] Furthermore, the lifting mechanism includes a lifting base, a hydraulic pump, a scissor structure, and a standing platform; the scissor structure is installed between the lifting base and the standing platform, the hydraulic pump drives the scissor structure, and the scissor structure is used to support and adjust the height of the standing platform.

[0014] Furthermore, temporary railings are provided on the front and rear sides of the standing platform, and the temporary railings on both sides are provided with detachable chains, which surround the standing platform with the temporary railings.

[0015] Furthermore, the base is provided with a translational track parallel to the axis of the GIL tube, and the lower end of the lifting base is provided with a slot that cooperates with the translational track. The lifting base can be slidably installed on the translational track through the slot. There are multiple lifting mechanisms, and each lifting mechanism is symmetrically distributed on both sides of the GIL tube.

[0016] This solution also provides a comparative installation method for GIL pipes, based on the aforementioned modular structure-based sealed work chamber. The installation method includes the following steps: Move the main body of the work cabin onto the mobile trolley, move the mobile trolley to the vicinity of the work area, and ensure that the open side of the main body of the work cabin faces the work area. Move the main body of the work chamber to the work object and adjust the telescopic structure of the fixed frame so that the connecting flange of the GIL pipe is located inside the main body of the work chamber. One end of the temporary sealing curtain is fixed to the fixed frame, and the other end is fixed to the GIL tube to temporarily seal the position where the GIL tube passes through the main body of the work chamber. Unfold the roller shutter on the open side of the work cabin body and temporarily fix and seal the lower end of the roller shutter to complete the overall sealing of the work cabin body; The air purification component is activated to deliver purified air into the work chamber, creating a positive pressure environment within the work chamber. Workers inside the work cabin are installing flange connections for the GIL pipes.

[0017] Compared with the prior art, the present invention has the following advantages: (1) In this scheme, the frame of the sealed work chamber adopts a modular square tube structure and an embedded splicing scheme to achieve rapid assembly of the entire work chamber frame. At the same time, the retractable rods on the fixed frame can achieve micro-adjustment of multiple positions of the work chamber body. Each surface of the work chamber adopts an integral multi-module sealing membrane structure, which can quickly replace damaged membranes, greatly reducing the efficiency of the entire work chamber assembly and adapting to the efficient operation process of GIL pipes.

[0018] (2) An opening is set on one side of the fixed frame in this scheme. Based on the telescopic rod and square tube splicing structure, the size can be flexibly adjusted, and the fixed frame can be reused. The thickened film fixed by bolts on the fixed surface can be reused. Only the inner roller shutter and tape and other vulnerable parts need to be replaced. Compared with the current method of building a closed work cabin with almost total loss, the loss of vulnerable materials is greatly reduced, the construction cost is significantly reduced, and environmental protection requirements are met.

[0019] (3) In this scheme, the connection between the sealed work cabin and the intelligent platform trolley can be achieved by using the rail trolley platform to quickly transfer the entire sealed work cabin from one work area to the next, which greatly improves the transfer efficiency of the sealed work cabin. Moreover, the horizontally adjustable lifting mechanism inside the work cabin can be used in conjunction with the lifting operation of the lifting structure to move the operators to any position in the entire sealed work cabin, which improves the operational flexibility and practicality. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of the sealed working chamber provided by the present invention; Figure 2 This is a schematic diagram of the square tube splicing provided by the present invention; Figure 3 This is a schematic diagram of the structure of the telescopic rod provided by the present invention; Figure 4 This is a schematic diagram of the structure of the work cabin body provided by the present invention; Figure 5 This is a schematic diagram of the lifting mechanism provided by the present invention; Figure 6 This is a schematic diagram of the structure of the lifting structure and the base provided by the present invention. In the picture: 1. Operating cabin body; 2. Air purification assembly; 3. Mobile trolley; 4. GIL tube; 5. Outer tube; 6. Inner rod; 7. Electric telescopic rod; 8. Lifting mechanism; 9. Translation track; 11. Base; 12. Fixed frame; 13. Roller blind; 14. Temporary sealing curtain; 111. Support rollers; 121. Inner connecting square tube; 122. Outer connecting square tube; 123. Waist-shaped hole; 124. Threaded hole; 81. Lifting base; 82. Hydraulic pump; 83. Scissor mechanism; 84. Standing platform; 85. Temporary railing; 86. Chain. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] Example 1 like Figure 1As shown, this embodiment provides a modular, enclosed work chamber, including a mobile trolley 3, a work chamber body 1 mounted on the mobile trolley 3, and an air purification component 2. The mobile trolley 3 uses a rail-guided platform located on a fixed track within the GIL (Gas Infrared Lever) tunnel. The platform has wheels at its bottom, allowing it to move longitudinally along the track. The air purification component 2 is located at one end of the mobile trolley 3. The air purification component 2 includes a filter, a dehumidifier, and a temperature control device, capable of purifying, dehumidifying, and temperature-regulating external air before delivering it to the work chamber body 1 via an air supply duct. The mobile trolley 3 also has a battery module to provide power to the entire work chamber system, including the air purification component 2, the hydraulic pump 82 of the lifting mechanism 8, and the electric telescopic rod 7, among other electrical equipment.

[0028] Working principle: The fixed frame 12 is a square tube splicing structure, which is simple and convenient to install and connect. The fixed frame 12 of the working chamber body 1 can be quickly built on the base 11. The fixed frame 12 is covered and sealed with a thickened film. The openings of the GIL pipes on both sides are closed with trumpet-shaped temporary sealing curtains 14. The openings facing the work area are closed with roller shutters 13, so that the working chamber body 1 can be closed after the workers enter it. Then, the GIL pipe flange can be connected. Moreover, the telescopic rod on the fixed frame 12 can adjust the size of the working chamber body 1 to accommodate GIL pipes of different specifications.

[0029] The enclosed work chamber's frame utilizes a modular square tube structure and an embedded splicing scheme, enabling rapid assembly of the entire work chamber frame. Simultaneously, retractable rods on the fixed frame allow for micro-adjustments to multiple positions of the work chamber body. Each surface of the work chamber employs an integrated, multi-module sealing membrane structure, allowing for rapid replacement of damaged membranes, significantly reducing the efficiency of the entire work chamber assembly and aligning with the efficient operation process of GIL (Gas Injection Line) pipe systems.

[0030] In this embodiment, the work chamber body 1 includes a base 11 and a fixed frame 12. The bottom of the base 11 is provided with supporting rollers 111, and the mobile trolley 3 is provided with a work chamber slide rail 31 that cooperates with the supporting rollers 111. The work chamber slide rail 31 is arranged in a direction perpendicular to the axis of the GIL pipe 4. The base 11 of the work chamber body 1 slides and engages with the work chamber slide rail 31 via the supporting rollers 111, allowing it to move laterally on the work chamber slide rail 31. The work chamber slide rail 31 enables the work chamber body 1 to move laterally from the platform to the GIL pipe 4 working area after the mobile trolley 3 reaches the designated GIL pipe 4 connector position. Simultaneously, during relocation, the work chamber body 1 can move together with the mobile trolley 3, achieving rapid transfer of the entire chamber.

[0031] In this embodiment, the fixing frame 12 is mounted on the base 11, and the fixing frame 12 has an open opening on the side facing the work area, forming a C-shaped structure. Figure 2As shown, the fixed frame 12 is a square tube splicing structure, including an inner connecting square tube 121 and an outer connecting square tube 122. The outer cross-sectional dimension of the inner connecting square tube 121 is slightly smaller than the inner cross-sectional dimension of the outer connecting square tube 122. The inner connecting square tube 121 can be inserted into the outer connecting square tube 122 to form a socket connection. The surface of the outer connecting square tube 122 has an oblong hole 123, which is a long strip hole with a length of 100 mm and a width of 25 mm. The oblong hole 123 is arranged along the axial direction of the outer connecting square tube 122. The surface of the inner connecting square tube 121 is provided with multiple threaded holes 124. The threaded holes 124 are of specification M12 and are evenly spaced along the axial direction of the inner connecting square tube 121 with a spacing of 100 mm. During connection, the inner connecting square tube 121 is inserted into the outer connecting square tube 122, aligning a threaded hole 124 on the inner connecting square tube 121 with an oblong hole 123 on the outer connecting square tube 122. Then, a screw is passed through the oblong hole 123 and screwed into the threaded hole 124 to connect the two square tubes. The elongated structure of the oblong hole 123 allows the screw to slide within a certain range along the length of the hole, thereby adjusting the relative position between the inner connecting square tube 121 and the outer connecting square tube 122, enabling fine-tuning of the dimensions of the fixing frame 12. Once adjusted to the appropriate position, tightening the screw reliably fixes the two square tubes. By adjusting the inner connecting square tube 121 and the outer connecting square tube 122 at different positions, the length, width, and height of the work cabin body 1 can be adjusted according to the actual layout of the GIL pipes 4 on site, adapting to different sized work areas.

[0032] In this embodiment, the adjustable dimensions of the work cabin body 1 are: length 6 to 20 meters, width 3 to 6 meters, and height 3 to 5 meters. The square cross-section design of the square tubes provides an anti-rotation function for the inner connecting square tube 121 and the outer connecting square tube 122 during the socket fitting, preventing relative rotation between the connecting square tubes.

[0033] like Figure 3As shown, the top and both sides of the fixed frame 12 are telescopic rods, with the extension and retraction direction of the telescopic rods perpendicular to the open side. The telescopic rods include an outer sleeve 5, an inner sleeve 6, and an electric telescopic rod 7. The inner sleeve 6 is inserted inside the outer sleeve 5, and the electric telescopic rod 7 is located inside the outer sleeve 5, with one end connected to the outer sleeve 5 and the other end connected to the inner sleeve 6. The electric telescopic rod 7 includes a telescopic rod body, a motor drive device, and a controller. The telescopic rod body uses a screw-nut mechanism; the motor drive device rotates the screw to move the nut axially, thereby extending or shortening the telescopic rod. When it is necessary to adjust the size of the fixed frame 12, the controller issues a command, the motor drive device operates, pushing or pulling the inner sleeve 6 relative to the outer sleeve 5 to achieve precise fine-tuning of the size of the fixed frame 12. The travel range of the electric telescopic rod 7 is 200 to 500 mm, with an adjustment accuracy of up to 1 mm. The electric telescopic pole 7 further improves the convenience and accuracy of adjusting the size of the fixed frame 12, especially for frame components in high places or narrow spaces, allowing adjustments to be made without workers climbing or entering.

[0034] like Figure 4 As shown, a thickened film is covered on the fixed frame 12. The thickened film is made of transparent PVC material and has a thickness of 0.5 to 1.0 mm. The thickened film is fixed to the fixed frame 12 with bolts spaced 300 to 500 mm apart. The bolt fixing method for the fixed film is more secure and reliable than the traditional tape method, and the film is reusable, only needing to be replaced when damaged, reducing material waste. A roller shutter 13 is provided on the open side of the fixed frame 12. The roller shutter 13 is made of transparent fabric and is installed at the upper end of the open side of the fixed frame 12. The roller shutter 13 is normally rolled up. When it is necessary to seal the working chamber body 1, the roller shutter 13 is unfolded to cover the opening of the fixed frame 12. The lower end of the roller shutter 13 is fixed and sealed to the base 11 with Velcro, forming a complete sealed space.

[0035] The fixed frame 12 has flared temporary sealing curtains 14 on both sides to cooperate with the GIL tube 4. One end of the temporary sealing curtain 14 is a flared opening with a diameter matching the outer diameter of the GIL tube 4, and the other end is a rectangular frame. After the working chamber 1 is pushed into the working area of ​​the GIL tube 4, the GIL tube 4 passes through the temporary sealing curtain 14. The rectangular frame end of the temporary sealing curtain 14 is fixed to the fixed frame 12 with Velcro, and the flared opening end is fitted onto the outer surface of the GIL tube 4. Then, the edge of the flared opening is glued and fixed to the surface of the GIL tube 4 with aluminum foil tape, completing the temporary seal at the point where the GIL tube 4 passes through. The flared structure design of the temporary sealing curtain 14 allows it to adapt to GIL tubes 4 of different diameters. Compared with the traditional method of pasting film piece by piece, the quick fixing method of Velcro and tape improves the construction efficiency by more than 70%.

[0036] like Figure 5 As shown, the work cabin body 1 is equipped with a lifting mechanism 8, which includes a lifting base 81, a hydraulic pump 82, a scissor structure 83, and a standing platform 84. The scissor structure 83 consists of multiple cross-hinged rods connected by hinge points to form an X-shaped cross structure. The scissor structure 83 is installed between the lifting base 81 and the standing platform 84. The lifting base 81 is fixed to the base 11 of the work cabin body 1. The standing platform 84 is a rectangular flat plate with dimensions of 1.2 meters × 0.8 meters, and the platform surface is textured with anti-slip material. Temporary railings 85 are provided on the front and rear sides of the standing platform 84. The temporary railings 85 are 1.2 meters high and are welded from steel pipes to provide safety protection for workers. A detachable chain 86 is provided between the temporary railings 85 on both sides, and the chain 86 and the temporary railings 85 enclose the circumference of the standing platform 84. Chain 86 is connected to the temporary guardrail post 85 by hooks. Workers can remove chain 86 when entering or exiting and hang chain 86 when working to form a closed safe working space.

[0037] A hydraulic pump 82, with a power of 1.5 kW, is fixed to the lifting base 81. The hydraulic pump 82 is connected to a hydraulic cylinder via hydraulic lines, and the piston rod of the hydraulic cylinder is hinged to the bottom rod of the scissor structure 83. The hydraulic pump 82 drives the scissor structure 83. When the hydraulic pump 82 operates, hydraulic oil enters the hydraulic cylinder, pushing the piston rod outward. The piston rod pushes the bottom rod of the scissor structure 83 inward, increasing the crossing angle of the scissor structure 83, thereby lifting the standing platform 84 upward. The lifting mechanism 8 has a stroke range of 0 to 2 meters, allowing operators to be lifted to any height within the work cabin body 1. The scissor structure 83 supports and adjusts the height of the standing platform 84. The scissor structure design ensures that the lifting mechanism 8 achieves the required lifting height while minimizing the retracted height, saving interior space.

[0038] like Figure 6As shown, the base 11 is equipped with a translational track 9 parallel to the axis of the GIL tube 4. The translational track 9 is a linear guide rail, and the lower end of the lifting base 81 is provided with a slot that mates with the translational track 9. The lifting base 81 can be slidably mounted on the translational track 9 through the slot and can move along the direction of the translational track 9. The length of the translational track 9 is adapted to the length of the working chamber body 1, and the lifting mechanism 8 can move along the axial direction of the GIL tube 4 inside the chamber, with the movement range covering the entire length of the working area. The translational movement of the lifting mechanism 8 is achieved by manual push-pull or electric drive. The electric drive uses a motor and a gear and rack mechanism. The motor is fixed on the lifting base 81, the gear is connected to the motor output shaft, and the rack is fixed on the translational track 9. When the motor rotates, it drives the gear to roll on the rack, thereby pushing the lifting mechanism 8 to move along the translational track 9. There are multiple lifting mechanisms 8. In this embodiment, four sets of lifting mechanisms 8 are provided. Each lifting mechanism 8 is symmetrically distributed on both sides of the GIL pipe 4 and located at the four corners of the work cabin body 1, facilitating the operator's access to different working positions within the cabin. The combined vertical lifting and horizontal translation movement of the lifting mechanisms 8 allows the standing platform 84 to reach any three-dimensional spatial position within the work cabin body 1, achieving 100% work area coverage. Operators can easily reach any part of the GIL pipe 4 docking joint for installation work.

[0039] In this embodiment, the air purification component 2 adopts a positive pressure purification scheme. The air purification component 2 on the mobile trolley 3 delivers purified air into the working chamber body 1 through an air supply duct. One end of the air supply duct is connected to the air outlet of the air purification component 2, and the other end passes through the working chamber slide rail 31 into the working chamber body 1. Multiple air outlets are provided at the top of the chamber to ensure that the purified air is evenly distributed throughout the chamber. The airflow of the air purification component 2 is 500 to 1000 cubic meters per hour, and the airflow can be adjusted according to the actual volume of the working chamber body 1. The working chamber body 1 does not have an independent air outlet; excess air is naturally discharged through gaps at the joints of the chamber components that are not completely sealed. This design ensures that the air pressure inside the chamber is always higher than the external ambient air pressure, creating a positive pressure environment. The positive pressure value is controlled between 50 and 100 Pascals. This positive pressure environment effectively prevents unpurified external air from entering the chamber through gaps, ensuring the air quality inside the chamber. The purified air inside the chamber meets the following environmental parameters: temperature 20 to 25 degrees Celsius, relative humidity 40% to 60%, and cleanliness meeting ISO Class 7 standards, meaning that the number of particles with a diameter of 0.5 micrometers or greater per cubic meter of air does not exceed 10,000. These environmental parameters meet the high-precision requirements of the working environment for GIL pipe 4 mating installation, effectively avoiding the impact of airborne microparticles on the insulation performance of GIL pipe 4 and improving joint quality.

[0040] The workflow of this embodiment is as follows: First, the work chamber body 1 is moved onto the mobile trolley 3. The mobile trolley 3 moves along the track inside the GIL tube gallery to the vicinity of the designated GIL tube 4 joint position, with the open side of the work chamber body 1 facing the work area. Then, by controlling the drive device on the work chamber slide rail 31, the work chamber body 1 is moved laterally from the mobile trolley 3 to the GIL tube 4 work area, so that the open end of the fixed frame 12 is aligned with the GIL tube 4 joint. Next, according to the actual arrangement of the GIL tubes 4 on site, by adjusting the connection positions of the inner connecting square tube 121 and the outer connecting square tube 122 and the length of the electric telescopic rod 7, the size of the fixed frame 12 is adapted to the size of the work area, so that the connecting flange of the GIL tube 4 is located inside the work chamber body 1. After adjustment, the GIL pipe 4 passes through the temporary sealing curtain 14. The rectangular edge of the temporary sealing curtain 14 is fixed to the fixed frame 12 with Velcro, and the flared opening end is fitted onto the outer surface of the GIL pipe 4. The edge of the opening is then fixed to the surface of the GIL pipe 4 with aluminum foil tape, temporarily sealing the position where the GIL pipe 4 passes through the work chamber body 1. Then, the roller shutter 13 on the open side of the work chamber body 1 is unfolded to cover the opening of the fixed frame 12. The lower end of the roller shutter 13 is fixed and sealed to the base 11 with Velcro, completing the overall sealing of the work chamber body 1. After sealing, the air purification component 2 on the mobile trolley 3 is activated. The air purification component 2 begins to deliver purified air into the chamber, gradually creating a positive pressure environment inside, and the air quality meets the requirements for the GIL pipe 4 docking installation. The operator enters the work chamber body 1 and stands on the standing platform 84 of the lifting mechanism 8. By controlling the hydraulic pump 82 and the translation drive device, the standing platform 84 is moved to the designated position and height of the GIL pipe 4 connector. The operator inside the work chamber body 1 then performs the flange docking installation of the GIL pipe 4. After the operation is completed, the lifting mechanism 8 is lowered, the roller shutter 13 is retracted, the temporary sealing curtain 14 is removed, and the work cabin body 1 is returned to the mobile trolley 3 via the work cabin slide rail 31. The mobile trolley 3 moves along the track to the next GIL pipe 4 joint position, and the above process is repeated to achieve rapid transfer and reuse of the work cabin body 1.

[0041] Using the technical solution of this embodiment, the construction time of the work cabin body 1 is reduced by more than 70% compared with the traditional scaffolding plus temporary membrane solution. The traditional solution requires scaffolding to be erected one by one, and membrane to be laid and pasted piece by piece. The construction of a closed work area at a joint location usually takes 4 to 6 hours. However, this embodiment, through the rapid splicing of the modular fixed frame 12 and the rapid fixing of the temporary sealing curtain 14, reduces the construction time to 1 to 2 hours, which can adapt to the efficient operation process of GIL pipe 4 flange connection. In terms of material consumption, the membrane in the traditional solution is basically completely scrapped after removal, and each joint requires about 20 to 30 square meters of membrane. However, the C-shaped fixed frame 12 and the thickened membrane in this embodiment are reusable. Only the roller shutter 13 and the temporary sealing curtain 14 need to be replaced. The consumption of vulnerable materials at each joint is about 5 to 8 square meters, reducing material consumption by more than 70%. Regarding workspace coverage, traditional solutions rely on scaffolding, limiting workers' access to a limited area of ​​the scaffolding platform. This embodiment, however, utilizes a combination of vertical lifting and horizontal translation of the lifting mechanism 8, achieving 100% work area coverage, allowing workers to reach any location within the work cabin body 1. In terms of relocation efficiency, traditional solutions require complete dismantling of the scaffolding and membrane for each relocation, necessitating reconstruction at the new location, typically taking 6 to 8 hours. This embodiment, through connection with the mobile trolley 3, enables complete cabin transfer, reducing relocation time to 1 to 1.5 hours, improving efficiency by more than 5 times. Regarding environmental control, traditional solutions rely on temporary membrane sealing, resulting in poor sealing and difficulty in establishing a stable positive pressure environment. The cabin cleanliness typically only reaches ISO 8 or lower. This embodiment, through a positive pressure purification system, achieves a stable ISO 7 cleanliness level within the cabin, with temperature and humidity controlled within the optimal range for GIL pipe 4 connection, effectively ensuring joint quality and insulation performance.

[0042] Example 2 The difference from Embodiment 1 is that this embodiment provides a simplified, modularly based, enclosed work chamber without a mobile trolley 3. The work chamber body 1 is directly mounted on a fixed base for single-position GIL pipe 4 docking operations. The fixed frame 12 of the work chamber body 1 adopts the same socket structure of inner connecting square tube 121 and outer connecting square tube 122 as in Embodiment 1, and the connection method of waist-shaped hole 123 matching threaded hole 124, but without an electric telescopic rod 7. All size adjustments are completed manually. The operator uses a wrench to loosen the screws, adjusts the relative position of the inner connecting square tube 121 and outer connecting square tube 122, and then retightens the screws to complete the fixation. The structure of the thickened film, roller shutter 13, and temporary sealing curtain 14 of the fixed frame 12 is the same as in Embodiment 1.

[0043] In this embodiment, the number of lifting mechanisms 8 is reduced to two sets, located on both sides of the work cabin body 1. The driving method of the lifting mechanisms 8 is changed to electric screw drive. The electric screw drive device includes a motor, a screw, and a nut. The motor is fixed on the lifting base 81, the screw is connected to the motor output shaft, and the nut is connected to the bottom rod of the scissor structure 83. When the motor rotates, it drives the screw to rotate, and the nut moves along the screw axis, pushing or pulling the scissor structure 83 to extend or retract, thereby realizing the lifting and lowering of the standing platform 84. The power of the electric screw drive is 0.75 kW, and the lifting stroke is 0 to 1.5 meters. The size of the standing platform 84 is reduced to 1.0 meter × 0.6 meters, and other structures are the same as in embodiment 1. The lifting mechanism 8 can still be movably installed on the translation rail 9 on the base 11, and can move along the axial direction of the GIL tube 4 to realize a combination of horizontal and vertical movement.

[0044] In this embodiment, the air purification component 2 is not installed on the mobile trolley 3, but rather on a fixed base on the outside of the work chamber body 1. The air purification component 2 has an airflow of 300 to 500 cubic meters per hour, delivering purified air into the chamber through an air supply duct to create a positive pressure environment. The positive pressure value is controlled between 50 and 80 Pascals, and the cleanliness level inside the chamber meets the ISO Class 8 standard, meaning that the number of particles with a diameter greater than or equal to 0.5 micrometers per cubic meter of air does not exceed 100,000. Although the cleanliness level is lower than that of Embodiment 1, it still meets the environmental requirements for general GIL pipe 4 docking operations.

[0045] In this embodiment, the main body 1 of the work cabin has fixed dimensions of 10 meters in length, 4 meters in width, and 4 meters in height. The dimensions can be adjusted within a certain range by adjusting the number of fixed frame 12 modules, but the adjustment range is smaller than that of embodiment 1. This embodiment is suitable for application scenarios where the docking position of the GIL pipe 4 is relatively fixed and frequent relocation is not required. It reduces equipment costs by simplifying system configuration, while retaining the core technological advantages of modular fixed frame 12, such as rapid assembly, reusability, and combined lifting and translation movement.

[0046] In traditional solutions, the membrane is almost entirely discarded after removal, requiring approximately 20 to 30 square meters of membrane per joint. In contrast, the C-shaped fixing frame 12 and thickened membrane in this embodiment are reusable, requiring only the replacement of the roller shutter 13 and temporary sealing curtain 14. The material consumption per joint is only about 5 to 8 square meters, reducing material waste by over 70%. Regarding workspace coverage, traditional solutions rely on scaffolding, limiting workers to a limited area on the scaffolding platform. This embodiment, through the combined vertical lifting and horizontal translation of the lifting mechanism 8, achieves 100% work area coverage, allowing workers to reach any location within the work cabin 1. In terms of relocation efficiency, traditional solutions require complete dismantling of scaffolding and membrane for each relocation, necessitating reconstruction at the new location, typically taking 6 to 8 hours. This embodiment, through connection with the mobile trolley 3, enables complete cabin transfer, reducing relocation time to 1 to 1.5 hours, improving relocation efficiency by more than 5 times. In terms of environmental control, traditional solutions rely on temporary membrane seals, which have poor sealing effects and make it difficult to form a stable positive pressure environment. The cleanliness level inside the chamber can usually only reach ISO 8 or lower. However, this embodiment uses a positive pressure purification solution to achieve a stable cleanliness level of ISO 7 inside the chamber. The temperature and humidity are controlled within the optimal range for GIL pipe 4 connection, effectively ensuring the joint quality and insulation performance.

[0047] Example 3 The difference from Embodiment 1 is that this embodiment provides a simplified, modularly based, enclosed work chamber without a mobile trolley 3. The work chamber body 1 is directly mounted on a fixed base for single-position GIL pipe 4 docking operations. The fixed frame 12 of the work chamber body 1 adopts the same socket structure of inner connecting square tube 121 and outer connecting square tube 122 as in Embodiment 1, and the connection method of waist-shaped hole 123 matching threaded hole 124, but without an electric telescopic rod 7. All size adjustments are completed manually. The operator uses a wrench to loosen the screws, adjusts the relative position of the inner connecting square tube 121 and outer connecting square tube 122, and then retightens the screws to complete the fixation. The structure of the thickened film, roller shutter 13, and temporary sealing curtain 14 of the fixed frame 12 is the same as in Embodiment 1.

[0048] In this embodiment, the number of lifting mechanisms 8 is reduced to two sets, located on both sides of the work cabin body 1. The driving method of the lifting mechanisms 8 is changed to electric screw drive. The electric screw drive device includes a motor, a screw, and a nut. The motor is fixed on the lifting base 81, the screw is connected to the motor output shaft, and the nut is connected to the bottom rod of the scissor structure 83. When the motor rotates, it drives the screw to rotate, and the nut moves along the screw axis, pushing or pulling the scissor structure 83 to extend or retract, thereby realizing the lifting and lowering of the standing platform 84. The power of the electric screw drive is 0.75 kW, and the lifting stroke is 0 to 1.5 meters. The size of the standing platform 84 is reduced to 1.0 meter × 0.6 meters, and other structures are the same as in embodiment 1. The lifting mechanism 8 can still be movably installed on the translation rail 9 on the base 11, and can move along the axial direction of the GIL tube 4 to realize a combination of horizontal and vertical movement.

[0049] In this embodiment, the air purification component 2 is not installed on the mobile trolley 3, but rather on a fixed base on the outside of the work chamber body 1. The air purification component 2 has an airflow of 300 to 500 cubic meters per hour, delivering purified air into the chamber through an air supply duct to create a positive pressure environment. The positive pressure value is controlled between 50 and 80 Pascals, and the cleanliness level inside the chamber meets the ISO Class 8 standard, meaning that the number of particles with a diameter greater than or equal to 0.5 micrometers per cubic meter of air does not exceed 100,000. Although the cleanliness level is lower than that of Embodiment 1, it still meets the environmental requirements for general GIL pipe 4 docking operations.

[0050] In this embodiment, the main body 1 of the work cabin has fixed dimensions of 10 meters in length, 4 meters in width, and 4 meters in height. The dimensions can be adjusted within a certain range by adjusting the number of fixed frame 12 modules, but the adjustment range is smaller than that of embodiment 1. This embodiment is suitable for application scenarios where the docking position of the GIL pipe 4 is relatively fixed and frequent relocation is not required. It reduces equipment costs by simplifying system configuration, while retaining the core technological advantages of modular fixed frame 12, such as rapid assembly, reusability, and combined lifting and translation movement.

[0051] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A sealed operating cabin based on a modular structure, characterized in that, The system includes a mobile trolley (3) and a work cabin body (1) and an air purification component (2) mounted on the mobile trolley (3). The air purification component (2) is used to purify the air inside the work cabin body (1). The work cabin body (1) includes a base (11) and a fixed frame (12). The fixed frame (12) is mounted on the base (11). The fixed frame (12) has an opening on the side facing the work area. The fixed frame (12) is a square tube splicing structure. The top and both sides of the fixed frame (12) are telescopic rods. The telescopic direction is perpendicular to the opening side. The fixed frame (12) is covered with a thickened film. The opening side of the fixed frame (12) is provided with a roller shutter (13) for closing the opening of the fixed frame (12). The left and right sides of the fixed frame (12) are provided with trumpet-shaped temporary sealing curtains (14) that cooperate with the GIL pipe (4).

2. The sealed operating cabin based on a modular structure according to claim 1, characterized in that, The splicing structure of the fixing frame (12) includes an inner connecting square tube (121) and an outer connecting square tube (122). The inner connecting square tube (121) is inserted into the outer connecting square tube (122). The outer connecting square tube (122) is provided with a waist-shaped hole (123). The inner connecting square tube (121) is provided with a threaded hole (124) corresponding to the waist-shaped hole (123). The inner connecting square tube (121) and the outer connecting square tube (122) are connected by screws.

3. The sealed operating cabin based on a modular structure according to claim 1, characterized in that, The telescopic rod includes an outer tube (5), an inner tube (6), and an electric telescopic rod (7); the inner tube (6) is inserted inside the outer tube (5), the electric telescopic rod (7) is located inside the outer tube (5), and one end of the electric telescopic rod (7) is connected to the outer tube (5), and the other end is connected to the inner tube (6).

4. The sealed operating cabin based on a modular structure according to claim 1, characterized in that, The base (11) is provided with a support roller (111) at the bottom. The mobile trolley (3) adopts a rail trolley platform. The mobile trolley (3) is provided with a work cabin slide rail (31) that cooperates with the support roller (111). The mobile trolley (3) has a built-in battery module for powering the entire work cabin body (1).

5. A sealed operating cabin based on a modular structure according to claim 1, characterized in that, The thickened film is fixed to the fixed frame (12) by bolts. After the GIL tube (4) passes through the temporary sealing curtain (14), one end of the temporary sealing curtain (14) is fixed to the fixed frame (12) by Velcro, and the other end is fixed to the GIL tube (4) by tape. The roller shutter (13) is installed on the upper end of the open side of the fixed frame (12), and after the roller shutter (13) is unfolded, the lower end of the roller shutter is fixed and sealed by Velcro.

6. A sealed operating cabin based on a modular structure according to claim 1, characterized in that, The main body (1) of the work cabin is provided with a lifting mechanism (8). The lifting mechanism (8) is movably installed on the base (11). The moving direction of the lifting mechanism (8) is parallel to the axis of the GIL tube (4). The lifting mechanism (8) is used to adjust the height of the personnel.

7. A sealed operating cabin based on a modular structure according to claim 6, characterized in that, The lifting mechanism (8) includes a lifting base (81), a hydraulic pump (82), a scissor structure (83), and a standing platform (84); the scissor structure (82) is installed between the lifting base (81) and the standing platform (84), the hydraulic pump (82) drives the scissor structure (82), and the scissor structure (82) is used to support and adjust the height of the standing platform (84).

8. A sealed operating cabin based on a modular structure according to claim 7, characterized in that, Temporary railings (85) are provided on the front and rear sides of the standing platform (84), and the temporary railings (85) on both sides are provided with detachable chains (86), the chains (85) and the temporary railings (85) encircling the standing platform (84).

9. A sealed operating cabin based on a modular structure according to claim 6, characterized in that, The base (11) is provided with a translation rail (9) parallel to the axis of the GIL tube (4). The lower end of the lifting base (81) is provided with a slot that cooperates with the translation rail (9). The lifting base (81) can be slidably installed on the translation rail (9) through the slot. There are multiple lifting mechanisms (8), and each lifting mechanism (8) is symmetrically distributed on both sides of the GIL tube (4).

10. A comparative installation method for GIL pipes, based on a modular structure-based sealed work chamber as described in any one of claims 1-9, characterized in that, The installation method includes the following steps: Move the work cabin body (1) onto the mobile trolley (2), move the mobile trolley (2) to the vicinity of the work area, and the open side of the work cabin body (1) faces the work area; Move the work cabin body (1) to the work object and adjust the telescopic structure of the fixed frame (12) so that the connecting flange of the GIL pipe (4) is located inside the work cabin body (1). One end of the temporary sealing curtain (14) is fixed to the fixed frame (12), and the other end is fixed to the GIL pipe (4) to temporarily seal the position where the GIL pipe (4) passes through the working chamber body (1); Unfold the roller shutter (13) on the open side of the work cabin body (1) and temporarily fix and seal the lower end of the roller shutter (13) to complete the overall sealing of the work cabin body (1). The air purification component (2) is activated to deliver purified air into the work chamber body (1), thereby creating a positive pressure environment inside the work chamber body (1). Workers inside the work cabin (1) install the flange connection of the GIL pipe (4).

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