An insulating base structure for a platform door installation

Abstract

This invention discloses an insulating foundation structure for platform screen doors, belonging to the field of rail transit platform screen doors. It includes a box-type platform panel and at least two supporting columns. The edge of the box-type platform panel provides the installation foundation for the platform screen door. Insulating supports are installed between the box-type platform panel and the supporting columns. The supporting columns are set on the ground to support the box-type platform panel. This invention is installed within the main structure of the station platform level, located at the edge of the vehicle parking area, providing a waiting platform for passengers and simultaneously providing the installation foundation for the platform screen door. The insulating supports insulate the box-type platform panel and the supporting columns, ensuring that the box-type platform panel and the platform screen door installed on it are completely insulated from the station ground. The insulating supports are located at the bottom of the box-type platform panel and on the supporting columns, supporting the box-type platform panel and ensuring the insulation of the entire platform screen door installation foundation. This invention solves the problem of insulation failure of the platform panel due to water stains and dirt on the platform level during later operation, which poses a safety hazard of electric shock to passengers.

Description

Technical Field

[0001] This invention belongs to the field of rail transit platform screen doors, specifically relating to an insulating base structure for installing platform screen doors. Background Technology

[0002] Currently, most subway projects use DC power supply for trains. To prevent stray currents from causing electrochemical corrosion to underground pipelines and the steel structure within the station buildings, the train running rails, which also serve as return rails, are insulated from the ground. This results in a potential difference between the running rails and the ground, potentially reaching up to DC 90V (under normal operation and maximum load) or DC 120V (when one traction substation is disconnected and a "large double-sided" power supply is formed by adjacent traction substations). Therefore, a potential difference exists between the platform screen doors and the train, posing a safety hazard to passengers. If a passenger touches both the platform screen door and the train door simultaneously, injury may occur. Therefore, regulations stipulate corresponding requirements for door insulation and rail connection: platform screen doors and train cars should ideally be at the same potential. When connection to the rails is required, the equipotential requirement should meet the following: under normal circumstances, the metal components of the platform screen doors accessible to the human body should be insulated from the station structure, and the insulation resistance between the door body and the station structure should not be less than 0.5MΩ. In addition, an insulating area at least 900mm away from the door should be set on the ground inside and outside the platform and end door of the platform screen door.

[0003] Currently, the insulation measures implemented in domestic subways are as follows: For full-height platform screen doors, the upper telescopic insulating sleeve is connected to the civil engineering top beam, and the lower support is equipped with insulating pads / plates; for half-height platform screen doors, only the lower support is equipped with insulating pads / plates. At the same time, an insulating layer about 1200mm away from the door body is installed on the ground inside and outside the platform side and end door.

[0004] Patent CN218509937U discloses an insulating sealing device for the fastening bolts of platform screen door support connectors. It uses insulating sleeve gaskets to isolate the platform screen door's connecting components from the external environment, protecting them from moisture, pollution, and corrosion while enhancing the insulation performance of the platform screen door, facilitating leakage current monitoring, and improving subway operation safety. Patent CN219754355U discloses a door frame insulation structure and platform screen door. An insulating block is placed between the bottom of the cladding plate and the connecting plate, and a first insulating plate is placed between the bottom of the insulating block and the connecting plate. Even when passengers simultaneously touch the car body, cladding plate, and sill, no conductive path can be formed between the cladding plate and the car body, or between the sill and the car body, preventing electric shock hazards to passengers. Patent CN2... Patent No. 20133408U discloses an integral composite insulation layer for subway insulation systems, which adopts a platform concealed installation method and consists of an insulation support and sheet insulation material. It has the characteristics of being resistant to water immersion and moisture, and solves the problems of stability and durability defects in existing insulation layer technologies. Patent No. CN201835234U discloses a subway insulated platform structure. The technical solution adopted is to lay an ultra-flat insulation pad on the concrete base of the platform, apply an insulating mortar made of polymer insulating coating to the ultra-flat insulation pad, and then lay stone directly on the insulating mortar to form a tightly structured insulated platform. This eliminates the defects of hollow insulation material, falling off, etc., has good electrical insulation performance, high insulation resistance test value, and is easy to construct.

[0005] Since the insulating sleeves at the top of the platform screen doors are not located on the track area side and there is no sewage, the environmental conditions are relatively good and they are not prone to failure. The overall insulation failure of the platform screen doors is mainly caused by the failure of the insulation of the door base and the insulation layer of the platform plate. The main reasons are as follows:

[0006] 1. The construction environment for the base is harsh, with a lot of debris and dust on site. After installation, the base is directly exposed to this poor environment, making it susceptible to contamination and potential electrical continuity issues. Furthermore, the base is in close proximity to the concrete underlayment of the platform's insulation layer, making it vulnerable to contamination and insulation failure.

[0007] 2. The entire platform screen door is an equipotential body. The platform screen door has as many as 250 bases installed on the platform, which means there are 250 fault points. If any one of these fault points fails, the insulation of the entire platform screen door will fail.

[0008] 3. The insulation layer is installed on the ground inside and outside the platform doors and end doors, with a length of up to 135m. A 10mm gap is reserved between the insulation layer and the outer wall of the equipment room and the ground of the public area. If dirt or sewage enters the gap at any point, the insulation will fail, making it impossible to clean, inspect, or rectify. In addition, the insulation layer and the platform door body affect each other; failure of insulation on one may cause failure of the other.

[0009] 4. The insulation layer and the platform door's insulation performance affect each other; failure of insulation in either will also affect the other. Specifically, if the insulation layer is installed close to the metal threshold of the platform door (with a 10mm insulation gap and sealant applied), any dirt or sewage entering the gap will conduct through to both, causing a ripple effect.

[0010] When the insulation of the door body and platform panel insulation layer fails in China, the operating company can only take some remedial measures on the exposed metal surface of the door, such as spraying insulating paint and setting up insulating thresholds to prevent passengers and staff from contacting the door metal surface and vehicles at the same time, which could cause electric shock hazards. Although the relevant technologies have insulated the insulated door and platform door body, they cannot handle some severe situations. Therefore, this invention proposes an insulating base structure for platform door installation. Summary of the Invention

[0011] This invention addresses existing technical problems in the industry by proposing an insulating foundation structure for platform screen doors. This invention eliminates the need for insulation at the bottom of the platform screen door and the platform panel insulation layer, transferring the insulation of the platform screen door equipment to the foundation structure insulation. The insulating supports separate the box-type platform panel from the ground insulation, ensuring that the box-type platform panel and the platform screen door installed on it are integrally insulated from the station ground. This completely solves the problems of platform panel insulation failure and platform screen door insulation failure caused by water stains and dirt on the platform layer during later operation, posing a risk of electric shock to passengers.

[0012] To achieve the above objectives, the present invention is implemented through the following technical solution: an insulating base structure for installing platform screen doors, comprising a box-type platform panel and at least two supporting columns, wherein the edge of the box-type platform panel provides an installation base for the platform screen door, and insulating supports are provided between the box-type platform panel and the supporting columns, and the supporting columns are set on the ground to support the box-type platform panel.

[0013] Furthermore, the insulating support includes an upper steel plate and a lower steel plate, with an insulating pad placed between the upper and lower steel plates. A sealing cover is provided around the upper and lower steel plates, isolating the insulating pad from the outside environment. The sealing cover serves to prevent dust and water ingress, extending the working time of the insulating pad and preventing its failure.

[0014] Furthermore, the box-type platform slab is a hollow concrete box structure, and an upper pre-embedded steel plate seat is provided at the connection between the bottom surface of the box-type platform slab and the insulating support. The bottom surface of the box-type platform slab is connected to the insulating support through the upper pre-embedded steel plate seat and the upper steel plate.

[0015] Furthermore, a lower embedded steel plate is provided on the side where the supporting column connects to the insulating support, and the supporting column is connected to the insulating support through the lower embedded steel plate and the lower steel plate in a contact manner.

[0016] Furthermore, both the upper and lower steel plates are provided with recessed grooves, and the insulating pad is disposed within the recessed grooves. The recessed grooves horizontally limit the insulating pad disposed within them.

[0017] Furthermore, the top perimeter of the upper steel plate is provided with water-guiding eaves. These eaves allow leaking water from the platform level to drain outwards, preventing it from flowing into the insulating supports.

[0018] Furthermore, the top of the box-type platform is covered with decorative floor tiles, which are flush with the decorative floor layer of the public area of ​​the platform, and an insulation gap of 10-15mm is left between them.

[0019] Furthermore, an L-shaped insulating partition is installed within the insulating gap, and the top of the insulating gap is sealed with insulating adhesive. If insulation problems are encountered, debris and wastewater within the gap can be cleaned downwards along the gap, and then the insulating adhesive can be reapplied to seal the gap.

[0020] Furthermore, the aforementioned box-type platform panels are constructed using a precast concrete splicing method. The length of a single box-type platform panel can be 5-10 meters, determined according to the size of the station's hoisting holes. The segmented box-type platform panels also facilitate the troubleshooting of insulation issues.

[0021] Furthermore, the number of supporting columns can be four, six, or eight. The appropriate number of supporting columns can be selected based on the length of the box-type platform.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0023] 1. This invention is installed within the main structure of the station platform level, located at the edge of the vehicle parking area. It replaces the original equipment insulation scheme with a civil engineering foundation insulation scheme. The insulating supports will insulate the box-type platform slab and supporting columns, ensuring that the box-type platform slab and the platform doors installed on it are completely insulated from the station ground, providing passengers with a safer, fully insulated waiting platform. Insulation failure points are greatly reduced, and after implementation, it is unaffected by on-site construction or human environmental factors above the platform slab.

[0024] 2. The insulation solution of this invention is simpler and more reliable, completely solving the industry problem of door insulation and insulation layer failure. This invention eliminates the insulation measures for the platform screen door base, i.e., the insulation bushing 95, and also eliminates the insulation measures for the platform layer, i.e., the insulation adhesive layer 91, L-shaped insulation partition 92, and insulation roll 93. The platform screen door base can be directly installed without insulation and fixed to the edge of the box-type platform panel. At the same time, the base structure can be simplified in design, and the height and space occupied can also be optimized. After the platform screen door is installed, there is no need to check the insulation problem of the door structure, reducing construction procedures.

[0025] 3. This invention also eliminates the need for platform insulation layers, specifically the insulation adhesive layer 91, L-shaped insulation partition 92, and insulation roll 93. Interface coordination between different professional systems is simplified, eliminating the need to consider the construction coordination and procedures between the insulation roll and the concrete leveling layer and decorative floor tiles; only the insulation gap between the box-type platform panel and the surrounding public area floor decoration layer needs to be reserved.

[0026] 4. The box-type platform slabs utilize a prefabricated modular assembly method, transporting them directly from outside the station to the platform level, significantly reducing the construction period for the station's civil engineering. The manufacturing precision and process of the box-type platform slabs are guaranteed, avoiding problems such as platform slabs failing to meet platform door installation requirements due to civil engineering deviations, which necessitate chiseling and modification. This not only affects structural strength but also construction progress.

[0027] 5. This invention changes the traditional approach of implementing a series of insulation measures on the foundation surface of the platform slab, instead opting for a new insulation solution under the platform slab. This invention uses a limited number of insulating supports to support and insulate the box-type platform slab from the station floor, and employs permeable insulating gaps between it and surrounding non-insulated areas. The insulation method allows for inspection and rectification.

[0028] 6. Each section of the box-type platform slab in this invention has a 10mm insulation gap (vertical through-hole) between it and the surrounding public area floor finish. Even if sewage enters through the gap, it will drain downwards to the ground and will not enter the insulation structure. This further protects personal safety in severe situations. Even if the insulation gap fails, debris and sewage around the perimeter can be cleaned downwards, and then insulating sealant can be applied to seal the gap, making maintenance very convenient. Furthermore, the insulating supports are located at the bottom of the box-type platform slab, and the supports themselves incorporate features such as water-guiding eaves and sealing covers, ensuring that water and mud on the platform surface do not affect them.

[0029] 7. This invention uses supporting columns to elevate and support the box-type platform panel, keeping it away from drainage and providing space for inspecting the insulating supports. Furthermore, the insulating supports are installed between the bottom of the box-type platform panel and the columns, effectively keeping them away from the passenger waiting area and not affecting operation. If the insulating supports fail, they can be replaced individually. The platform doors and other structures on the box-type platform panel are not affected and will not impact operation.

[0030] 8. The box-type platform of this invention can be 5 to 10 meters long, supported by insulating supports. The number of insulating supports is minimized based on the load of the box-type platform, approximately 108, greatly reducing the number of potential failure points. Furthermore, the insulating gaps between the platform door sill and the insulating layer, and between the insulating layer and the non-insulated area, are continuously installed along the entire length of the station. Failure at any point would affect all others and be impossible to diagnose. In contrast, this invention only has insulating gaps between the box-type platform and the non-insulated area, which not only allows for troubleshooting but also reduces the surface area prone to insulation failure, making subsequent maintenance more convenient and cost-effective.

[0031] 9. This invention provides a completely new and substantial solution for open-air ground stations, namely, the use of vertically transparent insulating gaps between the box-type platform panels and the non-insulated areas. Even if rainwater flows into the gaps, it will drain downwards. Consequently, the rainwater will not damage the insulation of the structure when it drains, thus further enhancing personal safety. Attached Figure Description

[0032] Figure 1 This is a schematic diagram illustrating the installation relationship of the invention and the platform screen door within the station.

[0033] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0034] Figure 3 for Figure 1 Enlarged view of section B in the middle.

[0035] Figure 4 This diagram illustrates the installation relationship of subway platform panels, platform doors, and insulation layers in China.

[0036] Figure 5 for Figure 4 Enlarged view of a section at point C.

[0037] Among them, 1 is the box-type platform panel, 11 is the upper embedded steel plate seat, 2 is the supporting column, 21 is the lower embedded steel plate, 3 is the insulating support, 31 is the upper steel plate, 32 is the lower steel plate, 33 is the insulating pad, 34 is the sealing cover, 35 is the water guide, 4 is the decorative floor tile, 5 is the insulating gap, 6 is the L-shaped insulating partition, 7 is the insulating adhesive, 8 is the platform door, 91 is the insulating adhesive layer, 92 is the L-shaped insulating partition layer, 93 is the insulating roll layer, 94 is the concrete leveling layer, and 95 is the insulating bushing. Detailed Implementation

[0038] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand how the present invention uses technical means to solve technical problems and achieve technical effects and to implement it accordingly.

[0039] like Figures 1-3 As shown, an insulating foundation structure for installing platform screen doors includes a box-type platform panel 1. Platform screen doors 8 are installed on the edge of the box-type platform panel 1. The box-type platform panel 1 adopts a hollow concrete box structure. Multiple insulating supports 3 are installed below the box-type platform panel 1, insulating the box-type platform panel 1 and the platform screen door 8 installed on it from the station ground. A support column 2 is then installed below each insulating support 3. The support column 2 elevates the insulating support 3, away from drainage, and also provides space for inspection of the insulating support 3. If the insulating support 3 fails, it can be replaced individually.

[0040] This invention replaces the existing equipment insulation scheme with a civil engineering foundation insulation scheme. By using the insulating support 3 set under the box-type platform slab 1, the platform ground is separated from the box-type platform slab 1. In this way, the platform door 8 installed on it is completely insulated from the station ground, providing passengers with a safer and more completely insulated waiting platform.

[0041] This structural insulation design allows the platform screen door 8 base to be installed directly without insulation, simply by fixing it to the edge of the box-type platform panel 1. Simultaneously, the base structure can be simplified in design, and its height and space requirements can be optimized. After installation, there is no need to check for insulation issues in the door structure, reducing construction steps.

[0042] The box-type platform slab 1 in this invention is constructed using a precast concrete splicing method. Each slab is 5-10 meters long, determined by the size of the station's hoisting holes. The segmented box-type platform slab 1 also facilitates troubleshooting insulation issues. The box-type platform slab 1 shown in the figure is for illustrative purposes only; other shapes are also within the scope of this invention.

[0043] Furthermore, the prefabricated modular platform assembly method allows the box-type platform panels 1 to be transported directly from outside the station to the platform level, significantly reducing the construction period of the station's civil engineering. The manufacturing precision and process of the box-type platform panels 1 can be guaranteed, avoiding problems such as platform panels not meeting the installation conditions of platform doors 8 due to deviations in civil engineering construction, which would require chiseling and modification, affecting not only structural strength but also construction progress.

[0044] In the above embodiment, the box-type platform panel 1 is separated from the station body by an insulating support 3, thereby achieving insulation between the platform door 8 and the ground. However, this embodiment does not specify the specific form of the insulating support 3; it is sufficient as long as it can achieve electrical isolation between the box-type platform panel 1 and the platform floor. To better facilitate those skilled in the art to understand the present invention, this embodiment provides a specific form of the insulating support 3.

[0045] like Figure 2As shown, the insulating support 3 includes an upper steel plate 31 and a lower steel plate 32, with an insulating pad 33 placed between the upper steel plate 31 and the lower steel plate 32. The insulating pad 33 electrically isolates the upper steel plate 31 and the lower steel plate 32, thus completing the electrical isolation between the box-type platform 1 and the platform ground. A sealing cover 34 is provided around the upper steel plate 31 and the lower steel plate 32. The sealing cover 34, together with the upper steel plate 31 and the lower steel plate 32, isolates the insulating pad 33 from the outside environment, providing dust and water protection and extending the service life of the insulating pad 33.

[0046] Both the upper steel plate 31 and the lower steel plate 32 are provided with recessed grooves, and the insulating pad 33 is disposed within the recessed grooves. The recessed grooves provide horizontal restraint for the insulating pad 33 disposed inside.

[0047] An upper embedded steel plate seat 11 is provided on the bottom surface of the box-type platform slab, connecting it to the insulating support 3. The bottom surface of the box-type platform slab 1 is connected to the insulating support 3 via the upper embedded steel plate seat 11 and the upper steel plate 31. A lower embedded steel plate 21 is provided on the side where the supporting column 2 connects to the insulating support 3. The supporting column 2 is connected to the insulating support 3 via the lower embedded steel plate 21 and the lower steel plate 32. The position of the box-type platform slab 1 can be adjusted to ensure that its distance from the track center meets the design specifications and clearance requirements.

[0048] Water guide eaves 35 are provided around the top of the upper steel plate 31. The water guide eaves 35 allow water seeping from the platform level to drain outwards, preventing it from flowing into the insulating support 3.

[0049] In addition, decorative floor tiles 4 are laid on top of the box-type platform slab 1, flush with the decorative floor layer of the public area of ​​the platform, leaving a 10-15mm insulation gap 5 between them. An L-shaped insulating partition 6 is installed within the insulation gap 5, and the top of the gap 5 is sealed with insulating adhesive 7. If insulation problems are encountered, debris and wastewater can be cleaned down the gap, and then the insulation adhesive 7 can be reapplied to seal the gap.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An insulating base structure for installing platform screen doors, characterized in that, It includes a box-type platform panel (1) and at least two supporting columns (2). The edge of the box-type platform panel (1) provides an installation base for the platform door (8). Insulating supports (3) are provided between the box-type platform panel (1) and the supporting columns (2). The supporting columns (2) are set on the ground to support the box-type platform panel (1). The insulating support (3) includes an upper steel plate (31) and a lower steel plate (32). An insulating pad (33) is provided between the upper steel plate (31) and the lower steel plate (32). A sealing cover (34) is provided around the upper steel plate (31) and the lower steel plate (32). The sealing cover (34) and the upper steel plate (31) and the lower steel plate (32) isolate the insulating pad (33) from the outside.

2. The insulating base structure for installing platform screen doors according to claim 1, characterized in that: The box-type platform (1) is a hollow concrete box structure. An upper pre-embedded steel plate seat (11) is provided at the connection between the bottom surface of the box-type platform (1) and the insulating support (3). The bottom surface of the box-type platform (1) is connected to the insulating support (3) through the upper pre-embedded steel plate seat (11) and the upper steel plate (31).

3. The insulating base structure for installing platform screen doors according to claim 2, characterized in that: A lower embedded steel plate (21) is provided on the side where the support column (2) is connected to the insulating support (3). The support column (2) is connected to the insulating support (3) in contact through the lower embedded steel plate (21) and the lower steel plate (32).

4. An insulating base structure for installing platform screen doors according to claim 2, characterized in that: Both the upper steel plate (31) and the lower steel plate (32) are provided with concave grooves, and the insulating pad (33) is provided in the concave grooves.

5. An insulating base structure for installing platform screen doors according to claim 2, characterized in that: The top of the upper steel plate (31) is provided with a water guide (35) around its perimeter.

6. The insulating base structure for installing platform screen doors according to claim 1, characterized in that: The top of the box-type platform slab (1) is covered with decorative floor tiles (4), which are flush with the floor decoration layer of the public area of ​​the platform and have an insulation gap (5) of 10-15mm.

7. An insulating base structure for installing platform screen doors according to claim 6, characterized in that: An L-shaped insulating partition (6) is provided inside the insulating gap (5), and the top of the insulating gap (5) is sealed with insulating glue (7).

8. The insulating base structure for installing platform screen doors according to claim 1, characterized in that: The box-type platform slab (1) is constructed using a precast concrete splicing method.

9. An insulating base structure for installing platform screen doors according to claim 1, characterized in that: The number of the supporting columns (2) is four, six, or eight.

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