Transmission device, mechanism and control method for horizontal fire resisting shutter of underground railway hub
By adopting the stroke increased self -weight decrease transmission mechanism in the horizontal fire roller curtain, the existing level fireproof rolling curtain cannot rely on its own gravity to open. It realizes the function that can be closed by itself without external power sources during the fire. The spatial permeability and aesthetics meet the fire safety requirements of underground railway stations and other places.
Patent Information
- Application Number
- CN202411375516.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-01-24
AI Technical Summary
The existing horizontal fireproof roller blinds cannot be opened by their own gravity sliding, and their transmission devices occupy a large space, which cannot meet the fire safety requirements in underground railway stations and other crowded places.
Adopt the stroke increase of the self -weight drop transmission mechanism. Through the combination of guide cables, stroke increase mechanisms and heavyweight beams, the double -level level of fire -resistant rolling curtain is achieved. Essence
The function that can be closed by itself without the need for external dynamic sources during fires can be achieved, which improves spatial permeability and aesthetics. It is suitable for intensive places such as underground railway stations and other dense places to meet fire safety requirements.
Smart Images
Figure CN119352885A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of transmission and control systems of fireproof rolling curtains in underground railway hubs, and in particular relates to a transmission device, mechanism and control method of horizontal fireproof rolling curtains in underground railway hubs. Background Art
[0002] Fire separation is very important in architectural design, which affects the quality of building space and the effect of fire separation. With the rapid development of TOD integrated development concept, large-span space has gradually become a design trend. How to flexibly set up building fire separation while meeting relevant regulatory requirements and ensuring the effect of building space has become an urgent problem to be solved.
[0003] At present, the fire protection design of underground railway stations and urban subway stations all implements the "Metro Design Fire Protection Standard" (GB51298-2018), which clearly stipulates that "when setting up non-metro function places such as commerce on the upper or lower floors of the station hall, it is strictly forbidden to use the atrium to connect the station hall with non-metro function places such as commerce; the openings of the stairs or escalators connecting the non-metro function places such as commerce in the non-paid area of the station hall should be equipped with fireproof roller shutters with a fire resistance limit of not less than 3.00h, and the fireproof roller shutters should be controlled by the subway, commercial and other non-metro function places respectively. Fire walls should be set up on other critical surfaces around the stairs or escalators." Fire walls seriously affect the permeability of the space, and the guide rails and columns of the fireproof roller shutters will hinder the flow of people. Therefore, the vertical fire separation measures of the firewall plus the fireproof roller shutter are in conflict with the design requirements of the space that pursues large-span transparency and is convenient for the passage of people. However, since there is no need to arrange firewalls and column guide rails around the opening, the horizontal fireproof roller shutter has the advantages of transparent and beautiful space, convenient for the passage of people, and saving engineering costs.
[0004] A Chinese patent discloses a horizontal fireproof rolling shutter door device (CN97208521.1), which solves the problem of fireproof partition at the entrance of escalators. However, the Public Fire Department of the Ministry of Public Security issued the Guiding Opinions on Strengthening Fire Safety in Super-Large Urban Complexes (No. 113, 2016) in 2016, which began to require that "fireproof rolling shutters should have the function of automatically closing the opening by descending by their own weight in case of fire". In 2022, Article 6.4.8 of the mandatory engineering construction code "General Code for Building Fire Protection" (GB55037-2022) issued by the Ministry of Housing and Urban-Rural Development also clearly requires that fireproof rolling shutters used for fire separation "should have the function of automatically closing by their own weight in case of fire without relying on external power sources such as power supply". The horizontal fire shutter door device (CN97208521.1) relies on two sets of motors and transmission devices for braking, and cannot achieve the requirements of Public Fire Protection Document No. 113 (2016) and the General Code for Building Fire Protection (GB55037-2022) that the fire shutter should rely on its own weight to close the opening. Therefore, there is no horizontal fire shutter transmission device and control method that does not affect the transparency of the space and the passage of personnel, meets the fire protection requirements, and is suitable for crowded places such as underground railway hub comprehensive development.
[0005] In view of this phenomenon, the industry is in urgent need of a horizontal fireproof roller shutter transmission device, mechanism and control system suitable for underground railway hubs. In order to achieve better architectural space effects and simpler, safer and more effective fire separation measures, the present invention introduces a new transmission device and control method for horizontal fireproof roller shutters in underground railway hubs. For the first time, a self-weight descending transmission mechanism with doubled stroke is used in horizontal roller shutters to solve the problems that ordinary horizontal fireproof roller shutters cannot rely on their own gravity to slide down and open and occupy a large space, and to meet the use requirements of underground railway stations, subway stations, transportation hubs, large shopping malls and other places with limited land or dense personnel. Summary of the invention
[0006] In view of the fact that the guide rails and columns set up in traditional vertical fireproof roller shutters destroy the aesthetics and permeability of the space, affect the flow of people and pose a safety hazard, while the existing horizontal fireproof roller shutters cannot close the openings by their own weight, the purpose of the present invention is to provide a stroke-doubling self-weight descent transmission mechanism, a transmission device of the horizontal fireproof roller shutter of the underground railway hub using the same and a control method thereof, which can perform multiplied horizontal retraction and extension of the fireproof roller shutter through the transmission device, and in addition to meeting the functions of the existing horizontal fireproof roller shutters such as separating fire partitions, secondary descent, and realizing fire linkage, it also has the function of closing the opening by descending by its own weight and providing sound and light warnings, wherein the self-weight descent height is much smaller than the length of the roller shutter, achieving doubling of the stroke, which can improve the flexibility, aesthetics and spatial integrity of the horizontal fireproof roller shutter when arranged, and is suitable for underground railway stations, subway stations, transportation hubs, large shopping malls and other places with limited land or dense personnel.
[0007] The technical solution is as follows:
[0008] A stroke-multiplying self-weight descending transmission mechanism is provided, which is used to pull the traction and deployment structure to extend. Taking the present technical solution as an example, the traction and deployment structure is a fireproof roller shutter. The stroke-multiplying self-weight descending transmission mechanism comprises a guide rope, a stroke-multiplying mechanism and a counterweight structure. One end of the guide rope is connected to the traction and deployment structure, passes through the stroke-multiplying mechanism on the way, and the other end is fixed to the building structure. The counterweight structure is suspended under the stroke-multiplying structure. When the counterweight structure is lowered by its own weight, it pulls the stroke-multiplying mechanism. The stroke-multiplying mechanism pulls the traction and deployment structure through the guide rope. The extension length of the traction and deployment structure is in a multiple relationship with the vertical moving height of the counterweight structure.
[0009] The second invention object of the present invention is to provide a transmission device for a horizontal fireproof rolling shutter of an underground railway hub, which is applied to a horizontal fireproof rolling shutter arranged at an opening of a building staircase or escalator floor, comprising:
[0010] The electric transmission mechanism is located in the drum box, and includes a motor, a chain, a gear, a transmission shaft and a limiter for controlling the movement and retraction of the fireproof roller shutter;
[0011] A guide structure, comprising a guide rail structure arranged at the floor opening for guiding the fireproof rolling shutter to move and retract;
[0012] The self-weight descending transmission mechanism is used to convert the gravitational potential energy into kinetic energy. The self-weight descending transmission mechanism includes a guide rope, a stroke multiplication mechanism and a counterweight beam, wherein:
[0013] The guide rope is partially located in the guide rail structure, the travel multiplier mechanism and the counterweight beam are located in the ceiling space below the floor slab, one end of the guide rope is connected to the outer corner of the fireproof roller shutter, passes through the travel multiplier mechanism on the way, and the other end is fixed to the building structure, and the counterweight beam is suspended under the travel multiplier mechanism;
[0014] When a fire occurs, the counterweight beam drops due to its own weight, pulling the stroke multiplier mechanism, which pulls the fireproof roller shutter through the guide cable. The fireproof roller shutter extends along the guide rail structure to close the floor opening. The guide cable pulls the fireproof roller shutter on the guide rail structure to move a length that is a multiple of the vertical moving height of the counterweight beam (the multiple is not less than 2, taking this embodiment as an example, the multiple is twice the number of movable pulleys).
[0015] In one technical solution, the guide rail structure includes a rigid guide rail fixed on a fire barrier or a fire low wall at a floor opening for guiding the travel route of a fire shutter and a guide cable, and the guide cable is partially located in the rigid guide rail.
[0016] In one technical solution, when a fire occurs, the fire-fighting linkage is activated, the counterweight beam drops due to its own weight, pulling the guide rope, converting the gravitational potential energy into kinetic energy, and under the transmission of the guide rope, the guidance of the rigid guide rail and the control of the drum box, the fireproof roller shutter is horizontally pulled and stretched by the guide rope to close the floor opening.
[0017] In one technical solution, the stroke multiplying mechanism includes a pulley block, which includes at least one movable pulley passing through a guide rope, and the counterweight beam is suspended on the pulley shaft of the movable pulley, so that the descending height of the counterweight beam is much smaller than the length of the fireproof roller shutter, and the deadweight of the counterweight beam is sufficient to pull the fireproof roller shutter to extend and close the floor opening.
[0018] In one technical solution, two guide cables are connected at the two corners of the outer end of the fireproof roller shutter, and the two guide cables are laid in two rigid guide rails. One end of each guide cable is connected to the fireproof roller shutter, and the other end is fixed to the building structure. Each guide cable passes through at least one movable pulley, and the movable pulley is located on one side of the fixed end of the guide cable. A counterweight beam is mounted under the movable pulley, so that the movement of the guide cable can double the stroke when the deadweight decreases.
[0019] In one technical solution, the pulley block in the stroke multiplier mechanism may include multiple fixed pulleys and movable pulleys, wherein the number of movable pulleys in the pulley block is determined based on the length of the guide rope required to move on the guide rail to completely close the floor opening with the fireproof roller shutter.
[0020] In one technical solution, the drum box contains a motor, a chain, a gear, a transmission shaft, and a limiter. The drum box is fixed to the front side of the floor opening or the edge of the opening. The fireproof roller shutter is installed on the transmission shaft. The motor drives the transmission shaft to extend or retract the fireproof roller shutter and can control the extension speed of the fireproof roller shutter. The limiter is set at the start and stop positions of the fireproof roller shutter.
[0021] In one technical solution, it also includes a control box, on which are provided operating buttons for controlling the electric opening, closing and stopping of the fireproof roller shutter.
[0022] In one technical solution, a switch-type sound and light alarm is provided on the upper part of the counterweight beam, and a contact switch is provided between the counterweight beam and the bottom of the floor. When there is no fire, the sound and light alarm is in close contact with the bottom of the floor, and the contact switch is in the off position; when there is a fire environment, the counterweight beam descends by its own weight, the sound and light alarm is separated from the bottom of the floor, the contact switch is opened, and the sound and light alarm starts.
[0023] In a technical solution, the number of the sound and light alarms is several and they are evenly distributed along the axial direction of the counterweight beam.
[0024] In one technical solution, the counterweight beam is usually hidden in the ceiling space. After a fire occurs, the counterweight beam falls down to the triangular room under the escalator or is hidden in combination with an advertising information board.
[0025] The third invention object of the present invention is to provide a control method for a transmission device of a horizontal fireproof roller shutter of an underground railway hub, comprising the following steps:
[0026] S1. When there is no fire, the fireproof roller shutter is stored on the transmission shaft in the roller box;
[0027] S2. When a fire occurs and the electric transmission mechanism works normally, the fireproof rolling shutter relies on the electric transmission mechanism to brake; when the fire detector (such as a smoke detector or a temperature detector) senses a fire signal, the control system will issue a command, and the electric transmission mechanism in the drum box will start to pull the fireproof rolling shutter. The motor has its own damping effect, and can pull the fireproof rolling shutter 3 at a uniform speed to close the floor opening, and the start and stop positions of the fireproof rolling shutter are controlled by the limiter;
[0028] S3. When a fire occurs and the power is cut off, the motor is unlocked, the counterweight beam descends under gravity, and the fireproof roller shutter is horizontally extended under the control of the rigid guide rail and the drum box by the horizontal force of the guide rope. The fireproof roller shutter is evenly spread to close the floor opening by utilizing the damping effect of the original electric transmission mechanism. In this process, the stroke is doubled by the stroke multiplier mechanism, so that the descending height of the counterweight beam is much smaller than the extended length of the fireproof roller shutter;
[0029] S4. When a fire occurs, the counterweight beam is lowered to the inside of the triangular room below the escalator or combined with the advertising information board for a hidden setting;
[0030] S5. When a fire occurs, the fire control group will activate. As the counterweight beam descends, the sound and light alarm will separate from the bottom of the floor, the contact switch will open, and the sound and light alarm will start to provide a safety warning.
[0031] Combining all the above technical solutions, the advantages and positive effects of the present invention are as follows:
[0032] 1. The principle of the horizontal fireproof roller shutter transmission device and control method of the present invention is simple and effective, which solves the problem that the existing horizontal fireproof roller shutter cannot slide down and open by its own gravity, and matches the fire protection requirements (it meets the requirements of Public Fire Protection
[2016] No. 113 "Guiding Opinions on Strengthening Fire Safety Work in Super Large Urban Complexes" and "General Code for Building Fire Protection" GB55037-2022 that the fireproof roller shutter should have the function of closing by itself by its own weight without relying on external power sources such as power supplies in case of fire.) It provides a better choice for the architectural design of underground railway comprehensive development sites, especially TOD integrated development projects, and has wide application value.
[0033] 2. In the event of a fire, the fire-fighting linkage of the present invention occurs, and the counterweight beam drops due to its own weight, converting the gravitational potential energy into kinetic energy. Under the transmission of the guide rope, the guidance of the rigid guide rail and the control of the drum box, the fireproof roller shutter extends horizontally to close the floor opening. The counterweight beam is suspended on the stroke multiplication mechanism. When the dead weight drops, the length of the guide rope moving on the guide rail is in multiple relationship with the vertical moving length, so that when the net height between floors of the building site drops, the counterweight beam can pull the guide rope to fully extend the fireproof roller shutter to close the floor opening. The present invention has the advantages of flexible and beautiful space layout, strong spatial integrity, and convenient for people to pass through.
[0034] 3. In the present invention, the counterweight beam operation area can be combined with the ceiling space setting of the subway station to form the best state in the use of building space. Compared with the existing horizontal fireproof roller shutters, it is more suitable for underground railways, subway stations, transportation hubs, large shopping malls and other places with limited land or dense personnel.
[0035] In addition, the following important aspects are also provided as auxiliary evidence of the inventiveness of the present invention:
[0036] 1. Underground railway stations, transportation hubs, large shopping malls and other places with dense population, personnel safety is of paramount importance. The use of conventional vertical fire separation requires the arrangement of fire walls, fire shutters and guide rail columns around the opening, which is inconsistent with the design requirements of pursuing large-span transparency and convenient for the flow of people. The transmission device of the horizontal fire shutter of the underground railway hub provided in the ordinary present invention, on the basis of combining the horizontal fire shutter with the opening guardrail, also hides the counterweight beam that provides gravity drop in the comprehensive information board, advertising light box or triangle room, which solves the contradiction between fire safety protection and daily traffic use in densely populated places such as underground railway stations and developments, and solves the technical problems that people have always been eager to solve but have never been successful.
[0037] 2. In 2016, the Ministry of Public Security Fire Department issued Document No. 113, "Guiding Opinions on Strengthening Fire Safety in Super-Large Urban Complexes", which began to require that "fireproof roller shutters should have the function of automatically closing openings by descending by their own weight in case of fire". In 2022, Article 6.4.8 of the mandatory engineering construction specification "General Code for Building Fire Protection" (GB55037-2022) issued by the Ministry of Housing and Urban-Rural Development also clearly required that fireproof roller shutters used for fire separation "should have the function of automatically closing by their own weight in case of fire without relying on external power sources such as power supplies". At present, there is no horizontal fireproof roller shutter that does not take up too much space and can ensure fire safety, and is aimed at crowded places such as underground railway hub comprehensive development. The technical solution of the present invention can realize the self-closing of horizontal fireproof roller shutters by their own weight, overcoming the technical prejudice of the industry against horizontal fireproof roller shutters.
[0038] 3. In order to enable the counterweight beam to pull the horizontal fireproof roller shutter to close the entire floor opening within a relatively small descending height, the present invention uses a stroke doubling mechanism, so that the vertical moving height of the counterweight beam when its own weight descends is in a multiple relationship with the pulling and stretching length of the guide rope (twice the number of movable pulleys in the stroke doubling mechanism), so that the counterweight beam can pull the guide rope to fully extend the fireproof roller shutter to close the floor opening when the net height between floors of the construction site is lowered. The present invention is also applicable to the situation where an extra-long opening is opened in the floor, and unexpected technical effects have been achieved.
[0039] 4. With the high-quality development of urban construction, underground railway stations need to consider integration with surrounding urban spaces, and use transportation spaces to connect various urban functional spaces such as commerce, office, and leisure, to achieve station-city integration, enhance the value of urban space, and improve people’s quality of life. Therefore, it is inevitable that more and more underground railway comprehensive development projects will appear, and it is necessary to achieve more flexible fire separation between railway functions and commercial development on the premise of meeting fire safety requirements. The technical solution of the present invention can give full play to the advantages of horizontal fireproof roller shutters, such as flexible layout, transparent space, convenience for pedestrian flow, and economy. It can be foreseen that after the technical solution product is transformed, it will bring good economic and social benefits and have good commercial value. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, serve to explain the principles of the present disclosure;
[0041] Figure 1 It is a schematic diagram of the longitudinal section of conventional vertical fire protection division;
[0042] Figure 2 is a schematic longitudinal section diagram of Embodiment 2 of the present invention (a solution in which the counterweight beam is hidden in the ceiling space);
[0043] Figure 3 It is a longitudinal section schematic diagram of embodiment 2 of the present invention (the solution in which the counterweight beam is hidden in the triangular room);
[0044] Figure 4 is a cross-sectional schematic diagram of Example 2 of the present invention ( Figure 2 Middle 1-1 section);
[0045] Figure 5 is a schematic diagram of a local node of Embodiment 2 of the present invention;
[0046] Figure 6 It is a detailed diagram of the node of Embodiment 2 of the present invention (the solution in which the counterweight beam is hidden in the ceiling space, and in case of fire, the counterweight beam is lowered into the comprehensive information board);
[0047] Figure 7is a schematic diagram of parameters involved in the selection of the number of pulleys in Example 2 of the present invention;
[0048] Figure 8 Schematic diagram of a single-acting pulley block according to Embodiment 2 of the present invention;
[0049] Fig. 9 Schematic diagram of a double-acting pulley block according to Embodiment 2 of the present invention;
[0050] Fig.10 This is a flow chart of Embodiment 3 of the present invention.
[0051] In the figure: 1-reel box; 2-guide rail; 3-fireproof roller shutter; 4-guide rope; 5-stroke multiplier mechanism; 6-contact switch; 7-counterweight beam; 8-sound and light alarm; 9-fireproof glass railing or fireproof low wall; 10-movable pulley in single-moving pulley pulley block; 11-fixed pulley in double-moving pulley pulley block; 12-movable pulley block in double-moving pulley pulley block. DETAILED DESCRIPTION
[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.
[0053] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0054] Embodiment 1:
[0055] A stroke-multiplying self-weight descending transmission mechanism is used to pull the traction and deployment structure to extend. The stroke-multiplying self-weight descending transmission mechanism includes a guide rope, a stroke-multiplying mechanism and a counterweight structure. Taking this embodiment as an example, the traction and deployment structure is a fireproof roller shutter, and the counterweight structure is a counterweight beam. One end of the guide rope is connected to the traction and deployment structure, passing through the stroke-multiplying mechanism on the way, and the other end is fixed to the building structure. The counterweight structure is suspended under the stroke-multiplying structure. When the counterweight structure is lowered by its own weight, it pulls the stroke-multiplying mechanism. The stroke-multiplying mechanism pulls the traction and deployment structure through the guide rope. The extension length of the traction and deployment structure is in a multiple relationship with the vertical moving height of the counterweight structure (the multiple is not less than 2).
[0056] Embodiment 2:
[0057] A transmission device for a horizontal fireproof rolling shutter of an underground railway hub is applied to a horizontal fireproof rolling shutter arranged at an opening of a building staircase or escalator floor, comprising an electric transmission mechanism, a guide structure and a self-weight descending transmission mechanism, wherein:
[0058] The electric transmission mechanism is located in the drum box, and includes a motor, chain, gear, transmission shaft, and limiter for controlling the movement and retraction of the fireproof roller shutter. The motor drives the transmission shaft in the drum box to control and guide the opening, closing, and positioning of the fireproof roller shutter. The motor has the function of descending at a uniform speed by relying on the deadweight of the fireproof roller shutter. When the power is off, the fireproof roller shutter is released so that it can descend by gravity.
[0059] The guide structure includes a guide rail structure arranged at the parapet of the floor opening, and the edges of both sides of the fireproof rolling shutter are located in the guide rail structure and can slide along the guide rails, and the extension path of the fireproof rolling shutter can be controlled by the guide rails;
[0060] The self-weight descending transmission mechanism is the stroke multiplying self-weight descending transmission mechanism in Example 1. In this embodiment, it is a mechanism for realizing the automatic closing of the fireproof roller shutter under the gravity of the counterweight. The self-weight descending transmission mechanism includes a guide rope, a stroke multiplying mechanism and a counterweight beam, wherein:
[0061] The guide rope is located in the guide rail structure, one end of which is connected to the outer corner of the fireproof roller shutter, and the other end passes through the hole reserved on the floor, bypasses the stroke multiplier mechanism, and is then fixed upward to the bottom of the floor. The counterweight beam is suspended on the stroke multiplier mechanism. The fireproof roller shutter controls the direction of transmission through the guide rope and the guide rail structure. The stroke multiplier mechanism allows the counterweight beam to pull the guide rope on the guide rail length and the deadweight of the counterweight beam when its deadweight drops, meeting the requirement of pulling the fireproof roller shutter to slide and stretch in the guide rail until the floor opening is closed.
[0062] In this embodiment, when there is no fire, the fireproof roller shutter is stored on the transmission shaft in the drum box; when a fire occurs, the fireproof roller shutter can be controlled to be retracted and extended by the motor transmission mechanism in the drum box. When a power outage occurs, the counterweight beam descends by its own weight to pull the guide cable to extend and close the floor opening.
[0063] The transmission device also includes a self-weight descent transmission mechanism for converting gravity into kinetic energy, and the self-weight descent transmission mechanism includes a guide rope, a stroke multiplier mechanism and a counterweight beam. The guide rope is partially located in the guide rail structure, one end of which is connected to the outer corner of the fireproof roller shutter, and the other end is fixed to the building structure. The guide rope passes through the stroke multiplier mechanism on the way, and the counterweight beam is suspended on the stroke multiplier mechanism, so that when self-weight descent occurs, the length that the guide rope needs to move on the guide rail can pull the fireproof roller shutter to slide and stretch in the guide rail until the floor opening is closed. The existing horizontal fireproof roller shutter uses a conventional motor to push the curtain surface to spread, which cannot meet the requirements of spreading the curtain surface by self-weight under special conditions such as power failure. This technical solution is based on the existing products and adds a self-weight descending transmission mechanism (guide rope, stroke doubling mechanism, counterweight beam) and a switch-type sound and light alarm for the conversion of gravity into kinetic energy. Even under special conditions such as power failure, the fireproof roller shutter can be pulled and driven to spread and close the mouth by relying on the self-weight of the counterweight beam, solving the problem of spreading the curtain surface by self-weight under special conditions such as power failure. At the same time, it is equipped with a sound and light alarm for safety warning. The entire system has a simple structure, can be reused, and has automatic and manual control conditions. There is no need to set vertical fireproof roller shutters and guide rail columns at the floor opening. The space effect is transparent and convenient for personnel to pass, meeting fire protection requirements and saving construction costs.
[0064] like Figures 1 to 3 As shown, the drum box 1 is fixed to the edge of the opening on the front side of the escalator, and two rigid guide rails 2 are fixed on the fire barriers or fire walls on both sides of the opening of the escalator to guide the travel routes of the fireproof roller shutter 3 and the guide cable 4. The guide cable 4 passes through the two rigid guide rails 2, and one end of each guide cable 4 is connected to the fireproof roller shutter 3, and the other end is fixed to the bottom of the floor slab and passes through a stroke multiplier mechanism 5. The stroke multiplier mechanism 5 is at one end close to the fixed point of the building structure, and a counterweight beam 7 is suspended below the stroke multiplier mechanism 5. Normally, the counterweight beam 7 is connected to the contact switch 6 fixed on the floor structure board. In case of fire, the counterweight beam 7 is separated from the contact switch 6, and the sound and light alarm is turned on. Through the above transmission device, the horizontal fireproof roller shutter can realize the function of closing the opening by descending by its own weight.
[0065] Furthermore, in this embodiment, the guide rail structure includes a rigid guide rail 2 fixed on the fire barrier or fire low wall 9 at the floor opening for guiding the travel route of the fire curtain and the guide rope, and the guide rope is partially located in the rigid guide rail 2, such as Figures 4-5 As shown in the figure, two rigid guide rails are fixed on the fire barriers or fire walls on both sides of the escalator opening to guide the fire curtain and guide rope. For the local node diagram, see Figure 5 a, 5b; the fireproof roller shutter 3 is normally stored in the drum box 1, and one outer end is connected to two guide ropes; when the fireproof roller shutter 3 is electrically controlled and started under normal circumstances, the fireproof roller shutter 3 is horizontally extended under the control of the electric transmission mechanism drum box 1 to close the floor opening.
[0066] Furthermore, it can also be considered in the present embodiment that when a fire occurs, the power to the electric transmission mechanism drum box 1 is cut off, the motor in the drum box 1 releases the counterweight beam 7, the counterweight beam 7 drops due to its own weight, and the guide rope 4 is pulled, and the guide rope 4 pulls the fireproof roller shutter 3, and the fireproof roller shutter 3 slides and extends along the rigid guide rail 2 to close the floor opening.
[0067] Furthermore, in the present embodiment, it can also be considered that when the counterweight beam 7 descends under its own weight and pulls the guide rope 4, and when the guide rope 4 pulls the fireproof roller shutter 3, a hole needs to be opened in the floor, and the guide rope 4 needs to pass through the hole in the floor and descend to the building layer below the floor, and the sealing performance of the fireproof roller shutter is not affected by the hole in the floor.
[0068] Furthermore, in this embodiment, it can also be considered that the stroke doubling structure includes a pulley block, and the stroke doubling is achieved by the pulley block, so that the descending height of the counterweight beam is much smaller than the length of the roller shutter, and the operating area of the counterweight beam can be combined with the ceiling space setting of the station hall of the underground railway station to form the best state in the utilization of the building space.
[0069] Furthermore, in this embodiment, when the length of the floor opening is less than 2 times the net height between floors of the building, the pulley block in the stroke multiplication mechanism can be a single-acting pulley pulley block, in which a movable pulley 10 is provided. Figure 8 As shown, the guide rope passes over the movable pulley 10 in the single-moving pulley block, and two guide ropes 4 are connected at the two corners of the outer end of the fireproof roller shutter 3. The two guide ropes 4 are laid in two rigid guide rails 2. One end of each guide rope 4 is connected to the fireproof roller shutter 3, and the other end passes through the hole reserved on the floor, passes over the movable pulley 10 in the single-moving pulley block, and then is fixed upward to the bottom of the floor. A counterweight beam 7 is mounted under the movable pulley 10 in the single-moving pulley block. The deadweight of the counterweight beam 7 meets the requirement of pulling the fireproof roller shutter 3 to stretch and close the floor opening, so that the counterweight beam 7 can be used by the movable pulley 10 when its deadweight drops, so that the length of the guide rope 4 that needs to be moved on the guide rail 2 is twice the vertical moving height of the counterweight beam 7, L1+L2+L3=2H.
[0070] L1+L2+L3 represents the length that the guide cable 4 needs to move along the guide rail to completely close the floor opening of the fireproof roller shutter (L1 is the horizontal length that the guide cable 4 moves along the guide rail fixed on the rail, L2 is the length that the guide cable 4 moves along the guide rail fixed on the curved rail, and L3 is the vertical length that the guide cable 4 moves along the guide rail fixed on the rail), and H represents the vertical moving height of the counterweight beam, as shown in the figure below. Figure 7 shown.
[0071] Furthermore, Figure 8As shown, the movable pulley 10 in the single movable pulley block is mounted with a counterweight beam 7, and the operation area of the counterweight beam can be combined with the ceiling space of the underground railway station, the triangular room under the escalator or the comprehensive consultation board to form the best state in the utilization of the building space (such as Figure 2 , 3 , 6).
[0072] Furthermore, when the length of the floor opening is more than twice the net height between floors of the building, the pulley block in the stroke multiplication mechanism can be a double movable pulley block (the number of movable pulleys is 2) or a multi-movable pulley block (the number of movable pulleys is 3 or more), including a fixed pulley and a movable pulley, such as Fig. 9 As shown, the stroke multiplication factor is increased, so that the counterweight beam can pull the guide rope to fully extend the fire curtain to close the floor opening when the net height between floors of the building site is lowered. The number of movable pulleys in the stroke multiplication mechanism is determined according to the length that the guide rope 4 needs to move on the guide rail 2 to completely close the floor opening of the fire curtain. The calculation formula is:
[0073] n>(L1+L2+L3) / 2H
[0074] Note: In the formula, n represents the number of movable pulleys, (L1+L2+L3) represents the length of the guide cable 4 that needs to move along the guide rail for the fireproof roller shutter to completely close the floor opening (L1 is the horizontal length of the guide cable 4 moving along the guide rail fixed on the railing, L2 is the length of the guide cable 4 moving along the guide rail fixed on the curved railing, and L3 is the vertical length of the guide cable 4 moving along the guide rail fixed on the railing), and H represents the vertical moving height of the counterweight beam. Figure 7 Hint.
[0075] The formula for determining the number of fixed pulleys in the stroke multiplier mechanism is:
[0076] m=n-1
[0077] Note: In the formula, m represents the number of fixed pulleys, and n represents the number of movable pulleys.
[0078] Take the double-acting pulley block as an example. Fig. 9 As shown, the fixed pulley 11 in the double-moving pulley block is installed at the bottom of the floor, and the counterweight beam 7 is mounted under the pulley shaft of the movable pulley block 12 in the double-moving pulley block. After the guide rope 4 passes through the hole reserved in the floor, it passes through the movable pulley, the fixed pulley, the movable pulley... and finally is fixed to the bottom of the floor structure, so that the counterweight beam can pull the guide rope when the net height between floors of the building site drops, so that the fireproof roller shutter is fully extended to close the floor opening.
[0079] It should be noted that the length of the guide rope moving on the rigid guide rail is in a multiple relationship with the vertical moving height of the counterweight beam (the multiple is not less than 2). The above multiple is the calculation result under ideal conditions, and there may be certain errors in actual conditions. The length of the movable pulley, fixed pulley and the guide rope wound around the movable pulley and fixed pulley is ignored in the above calculation, because in actual conditions, the size of the movable pulley and fixed pulley is very small compared to the length of the guide rope, which can be ignored under ideal conditions.
[0080] Furthermore, in the present embodiment, it can also be considered that the drum box 1 contains a motor, a chain, a gear, a transmission shaft, and a limiter. The drum box 1 is fixed on the front side of the floor opening or the edge of the opening. The fireproof roller shutter 3 is installed on the transmission shaft. The motor drives the transmission shaft to extend or retract the fireproof roller shutter 3, and can control the extension speed of the fireproof roller shutter 3. The limiter is set at the start and stop position of the fireproof roller shutter 3. The drum box can use existing molded product components to meet the conventional functions of the horizontal fireproof roller shutter. The drum box can control the conventional functions such as the unfolding speed and secondary unfolding function of the fireproof roller shutter. The operation of the motor in the drum box can retract the entire device to its original state.
[0081] Furthermore, it can also be considered in this embodiment that the control box is also included, and the control box is provided with operating buttons for controlling the electric opening, closing and stopping of the fireproof roller shutter 3.
[0082] Furthermore, in this embodiment, it can be considered that a switch-type sound and light alarm 8 is provided on the upper part of the counterweight beam, and a contact switch is provided between the counterweight beam and the bottom of the floor. Normally, the sound and light alarm is in close contact with the bottom of the floor, and the contact switch is in the off position; when in a fire environment, the counterweight beam descends by its own weight, the sound and light alarm is separated from the bottom of the floor, the contact switch is turned on, and the sound and light alarm starts. The sound and light alarm 8 can be connected in series in multiples and evenly distributed along the axial direction of the counterweight beam 7.
[0083] Furthermore, in this embodiment, it can also be considered that when the counterweight beam is hidden in the ceiling space, the bottom of the counterweight beam can be decorated to coordinate with the same material as the ceiling to ensure the beauty of the interior.
[0084] Furthermore, in the present embodiment, it can also be considered that when a triangular room is provided under the escalator, the counterweight beam can also be hidden in the triangular room to avoid hidden dangers to the dense flow of people between the underground railway station and the commercial development area when the counterweight beam is lowered. In this case, the sound and light alarm may not be provided.
[0085] Furthermore, in this embodiment, it can also be considered that the counterweight beam can be combined with a comprehensive information board or an advertising light box to be hidden, so as to form a physical safety barrier between the counterweight beam and dense human flow.
[0086] In this embodiment, a transmission device for a horizontal fireproof rolling curtain of an underground railway hub is provided, which is applied to a horizontal fireproof rolling curtain set at a floor opening such as a staircase or an escalator, and includes a component drum box 1 (containing a motor, a chain, a gear, a transmission shaft, a stopper, etc.), a guide rail 2, a control box, a self-weight lowering mechanism of a combined component (a guide rope 4, a stroke multiplication mechanism 5, a counterweight beam 7), and a switch-type sound and light alarm 8, etc. The drum box 1 is fixed to the front edge of the escalator opening, the fireproof rolling curtain 3 is installed on the transmission shaft, the motor can drive the transmission shaft to retract the fireproof rolling curtain 3, and can control the extension speed of the fireproof rolling curtain 3, and the stopper sets the start and stop position of the fireproof rolling curtain; when there is no fire, the fireproof rolling curtain 3 is stored on the transmission shaft in the drum box 1, and the two corners of the outer end are respectively connected to the guide rope 4; the guide rail 2 is fixed to the fireproof fence 9 at the escalator opening to guide the travel route of the fireproof rolling curtain 3 and the guide rope 4; the control box is provided with an operation button to control the fireproof rolling curtain 3 is electrically opened, closed and stopped, and can be controlled by the underground railway and the development site respectively under daily working conditions. Under fire working conditions, it receives the fire alarm signal to automatically complete the action of the fireproof roller shutter 3; the guide rope 4 of the deadweight descending mechanism is partially located in the rigid guide rail 2, one end is connected to the fireproof roller shutter 3, and the other end is fixed to the building structure, and the stroke multiplication mechanism 5 passes through the guide rope 4; the counterweight beam 7 is suspended on the movable pulley shaft, and the deadweight size is sufficient to pull the fireproof roller shutter 3 to extend and close the opening; the sound and light alarm 8 is installed on the upper part of the counterweight beam 7, and a contact switch is set between it and the bottom of the floor. The "Subway Fire Prevention Standard" clearly stipulates that fireproof roller shutters should be installed at the openings of stairs or escalators connecting non-subway functional places such as commercial areas in the non-paid area of the station hall. When not in use under daily working conditions, the fireproof roller shutter 3 is in the drum box 1, and the stroke multiplier 5 and the counterweight beam 7 are suspended and stationary in the ceiling space under the floor where the stair entrance is located, without affecting the normal use of the space; when the space is separated for daily operation or when a fire occurs and the power is not cut off, the control box receives information and electrically controls the retraction and extension of the fireproof roller shutter; when a fire occurs and the power is cut off, the motor is unlocked, the counterweight beam 7 descends under gravity, and the stroke multiplier 5 pulls the guide rope 4 to pull the fireproof roller shutter 3 to extend and fall; the sound and light alarm 8 falls with the counterweight beam 7, separates from the bottom of the floor, and pulls the contact switch to issue an sound and light alarm.The present invention fundamentally solves the problem that conventional vertical fire shutters need to arrange guide rails and columns and fire walls around the opening, which interferes with and hinders the flow of people and affects the transparency of the space. At the same time, the horizontal fire shutter structure that slides down and opens by its own gravity can meet the requirements of Document No. 113 of Public Fire Protection
[2016] on Strengthening Fire Safety in Super-Large Urban Complexes, which states that "fire shutters should have the function of automatically closing openings by descending their own weight in the event of a fire". The mandatory engineering construction specification "General Code for Fire Protection of Buildings" (GB55037-2022) issued by the Ministry of Housing and Urban-Rural Development in 2022 also clearly requires in Article 6.4.8 that fire shutters used for fire separation "should have the function of closing automatically by their own weight in the event of a fire without relying on external power sources such as power supplies". This solves the problem that existing horizontal fire shutters cannot slide down and open by their own weight, and creatively provides a better choice for building fire protection design. It has wide application value in the integrated development of underground railway stations TOD and large-scale urban complex projects.
[0087] Embodiment 3:
[0088] A method for controlling a transmission device of a horizontal fireproof rolling curtain of an underground railway hub comprises the following steps:
[0089] S1. When there is no fire, the fireproof roller shutter is stored on the transmission shaft in the roller box;
[0090] S2. When a fire occurs and the electric transmission mechanism works normally, the fireproof rolling shutter relies on the electric transmission mechanism to brake; when the fire detector (such as a smoke detector or a temperature detector) senses a fire signal, the control system will issue a command, the electric transmission mechanism in the drum box 1 will start, and the fireproof rolling shutter will be pulled. The motor has its own damping effect, and can pull the fireproof rolling shutter 3 at a uniform speed to close the floor opening, and the start and stop positions of the fireproof rolling shutter 3 will be controlled by the limiter;
[0091] S3. When a fire occurs and the power is cut off, the motor is unlocked, the counterweight beam 7 descends under gravity, and the fireproof roller shutter 3 is horizontally extended under the control of the rigid guide rail 2 and the drum box 1 by the horizontal force of the guide cable 4. The fireproof roller shutter 3 is horizontally extended by the rigid guide rail 2 and the drum box 1. The damping effect of the original electric transmission mechanism is used to spread the fireproof roller shutter 3 at a uniform speed to close the floor opening. In this process, the stroke is doubled by the stroke multiplier mechanism 5, so that the descending height of the counterweight beam 7 is much smaller than the extended length of the fireproof roller shutter 3.
[0092] S4. When a fire occurs, the counterweight beam 7 is lowered to the inside of the triangular room below the escalator or combined with the advertising information board to be hidden;
[0093] S5. When a fire occurs, the fire fighting linkage is activated. As the counterweight beam 7 descends, the sound and light alarm 8 separates from the bottom of the floor, the contact switch 6 opens, and the sound and light alarm starts to provide a safety warning.
[0094] In this embodiment, the drum box is fixed to the front side of the floor opening or the edge of the opening, the fireproof roller shutter is stored on the transmission shaft in the drum box, two rigid guide rails are fixed to the fireproof glass railings or fireproof low walls on both sides of the floor opening, two guide cables are laid in the two rigid guide rails, one end of each guide cable is connected to the fireproof roller shutter, and the other end is fixed to the bottom of the floor slab, the rigid guide rail guides the travel route of the fireproof roller shutter and the guide cable, each guide cable passes through at least one movable pulley, and the movable pulley is located on one side of the fixed end of the guide cable , a counterweight beam is mounted under the movable pulley, and a switch-type sound and light alarm is installed on the upper part of the counterweight beam, and a contact switch is set between the counterweight beam and the bottom of the floor. When a fire occurs, the counterweight beam descends by its own weight to pull the guide rope, and the fire curtain is pulled by the guide rope. Under the control of the rigid guide rail and the drum box, the fire curtain extends to close the floor opening. In this process, the stroke multiplication mechanism is used to double the stroke, so that the counterweight beam can pull the guide rope to fully extend the fire curtain to close the floor opening when the net height between floors of the building site drops. At the same time, the sound and light alarm is separated from the bottom of the floor, the contact switch is turned on, and the sound and light alarm starts to provide a safety warning.
[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A stroke multiplier self-weight descending transmission mechanism, used to pull the traction deployment structure to extend, characterized by: It includes a guide rope, a stroke multiplier mechanism and a counterweight structure. One end of the guide rope is connected to the traction and deployment structure and passes through the stroke multiplier mechanism on the way. The other end is fixed on the building structure. The counterweight structure is suspended under the stroke multiplier structure. When the counterweight structure drops under its own weight, it pulls the stroke multiplier mechanism. The stroke multiplier mechanism pulls the traction and deployment structure through the guide rope. The extension length of the traction and deployment structure is in a multiple relationship with the vertical moving height of the counterweight structure.
2. A transmission device for a horizontal fireproof rolling curtain in an underground railway hub, which is applied to a horizontal fireproof rolling curtain installed at the opening of a building staircase or escalator floor, characterized in that: include: The electric transmission mechanism is located in the drum box, and includes a motor, a chain, a gear, a transmission shaft and a limiter for controlling the movement and retraction of the fireproof roller shutter; A guide structure, comprising a guide rail structure arranged at the floor opening for guiding the fireproof rolling shutter to move and retract; The self-weight descending transmission mechanism is a stroke multiplying self-weight descending transmission mechanism as claimed in claim 1, which is used to convert gravitational potential energy into kinetic energy, and the self-weight descending transmission mechanism includes a guide rope, a stroke multiplying mechanism and a counterweight beam, wherein: The guide rope part is located in the guide rail structure, the stroke multiplier mechanism and the counterweight beam are located in the ceiling space below the floor, one end of the guide rope is connected to the outer corner of the fireproof roller shutter, passes through the stroke multiplier mechanism on the way, and the other end is fixed on the building structure, and the counterweight beam is suspended under the stroke multiplier mechanism; in the event of a fire, the counterweight beam drops under its own weight and pulls the stroke multiplier mechanism, and the stroke multiplier mechanism pulls the fireproof roller shutter through the guide rope, and the fireproof roller shutter extends along the guide rail structure to close the floor opening, and the moving length of the fireproof roller shutter pulled by the guide rope on the guide rail structure is in a multiple relationship with the vertical moving height of the counterweight beam.
3. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 2 is characterized by: The guide rail structure comprises a rigid guide rail fixed on a fire barrier or a fire low wall at a floor opening for guiding the travel route of a fireproof roller shutter and a guide cable, and the guide cable part is located in the rigid guide rail.
4. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 3 is characterized by: The stroke multiplying mechanism includes a pulley block, which includes at least one movable pulley passing through a guide rope. The counterweight beam is suspended on the pulley shaft of the movable pulley, so that the descending height of the counterweight beam is much smaller than the length of the fireproof roller shutter. The deadweight of the counterweight beam is sufficient to pull the fireproof roller shutter to extend and close the floor opening.
5. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 4 is characterized by: Two guide cables are connected at the two corners of the outer ends of the fireproof roller shutter, and the two guide cables are laid in two rigid guide rails. One end of each guide cable is connected to the fireproof roller shutter, and the other end is fixed to the building structure. Each guide cable passes through at least one movable pulley, and the movable pulley is located on one side of the fixed end of the guide cable. A counterweight beam is mounted under the movable pulley, so that the length that the guide cable needs to move on the guide rail structure when its own weight drops is in multiple relationship with the vertical moving length.
6. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 2 is characterized by: The drum box contains a motor, a chain, a gear, a transmission shaft, and a limiter. The drum box is fixed to the front side of the floor opening or the edge of the opening. The fireproof roller shutter is installed on the transmission shaft. The motor drives the transmission shaft to extend or retract the fireproof roller shutter and can control the extension speed of the fireproof roller shutter. The limiter is set at the start and stop position of the fireproof roller shutter.
7. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 6 is characterized by: It also includes a control box, on which are provided operating buttons for controlling the electric opening, closing and stopping of the fireproof rolling curtain.
8. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 2 is characterized by: A switch-type sound and light alarm is arranged on the upper part of the counterweight beam, and a contact switch is arranged between the counterweight beam and the bottom of the floor. When there is no fire, the sound and light alarm is in close contact with the bottom of the floor, and the contact switch is in the off position; when there is a fire environment, the counterweight beam descends by its own weight, the sound and light alarm is separated from the bottom of the floor, the contact switch is opened, and the sound and light alarm starts.
9. The self-weight falling horizontal fireproof rolling shutter for underground railway comprehensive development sites according to claim 2, characterized in that: The counterweight beam is usually hidden in the ceiling space. After a fire occurs, the counterweight beam falls down and is located in the triangular room below the escalator or is hidden in combination with an advertising information board.
10. A method for controlling a transmission device of a horizontal fireproof roller shutter of an underground railway hub according to any one of claims 2 to 9, characterized in that: The following steps are involved: S1. When there is no fire, the fireproof roller shutter is stored on the transmission shaft in the roller box; S2. When a fire occurs and the electric transmission mechanism works normally, the fireproof rolling shutter relies on the electric transmission mechanism to brake; when the fire detector senses a fire signal, the control system will issue a command, the electric transmission mechanism in the drum box will start, and the fireproof rolling shutter will be pulled. The motor has its own damping effect, and can pull the fireproof rolling shutter at a uniform speed to close the floor opening, and the start and stop positions of the fireproof rolling shutter are controlled by the limiter; S3. When a fire occurs and the power is cut off, the motor is unlocked, the counterweight beam descends under gravity, and the fireproof roller shutter is horizontally extended under the control of the rigid guide rail and the drum box by the horizontal force of the guide rope. The fireproof roller shutter is evenly spread to close the floor opening by utilizing the damping effect of the original electric transmission mechanism. In this process, the stroke is doubled by the stroke multiplier mechanism, so that the descending height of the counterweight beam is much smaller than the extended length of the fireproof roller shutter; S4. When a fire occurs, the counterweight beam is lowered to the inside of the triangular room below the escalator or combined with the advertising information board for a hidden setting; S5. When a fire occurs, the fire control group will activate. As the counterweight beam descends, the sound and light alarm will separate from the bottom of the floor, the contact switch will open, and the sound and light alarm will start to provide a safety warning.