Magnetic positioning structure of folding smoke screen vertical wall
By combining a magnetic positioning structure and bolted connections, the problem of large horizontal space occupation of foldable smoke curtains is solved, enabling flexible storage and improved smoke prevention in irregular buildings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI JINCHANG HUAAN IND CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-03
AI Technical Summary
Existing folding smoke curtains occupy a large amount of horizontal space during installation and cannot be effectively stored in irregularly shaped buildings, especially at corners where they cannot be rotated for storage, thus affecting their usability.
The magnetic positioning structure uses an electromagnet to connect with the connecting metal, which fixes and stores the foldable smoke curtain cover. Combined with bolt connection and limiting device, it ensures effective use of vertical space and stable storage.
It effectively reduces the horizontal space occupied by the folding smoke curtain, and enables flexible storage inside irregular buildings, especially in corners, thus improving the smoke prevention effect.
Smart Images
Figure CN224441963U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foldable smoke curtain technology, specifically to a magnetic positioning structure for a foldable smoke curtain. Background Technology
[0002] Foldable smoke curtains are made of non-combustible materials and are fixed or movable smoke barriers that hang at least 500mm from the ceiling. Movable smoke curtains refer to smoke curtains that automatically hang down during a fire due to the action of heat sensors, smoke sensors, or other control devices. They are mainly used in high-rise or super high-rise shopping malls, office buildings, and warehouses, and can effectively block the horizontal flow of smoke under the building ceiling to improve the smoke exhaust effect in smoke control zones, thus playing a certain role in protecting people's lives and property.
[0003] Foldable smoke curtains are typically installed inside buildings to block smoke. Their installation length is usually no less than 500mm, meaning they are vertically positioned below the roof. This obstructs interior space, necessitating a reduction in space usage. For example, patent CN222172904U discloses a foldable electromagnetic smoke curtain with a reasonable structural design. Compared to fixed smoke curtains, it effectively improves the visual space of corridors and reduces the risk of accidental collisions. Compared to electrically retractable or roller shutter smoke curtains, it effectively reduces costs and eliminates the need to damage the ceiling. This solution achieves the advantage of folding and storing the smoke curtain, reducing usable space.
[0004] However, this solution has the following problems in actual use:
[0005] First, although this solution can achieve folding and storage, the folding is done at a direct angle. While it saves vertical space, it occupies horizontal space, affecting the installation of roof decorations.
[0006] Secondly, the solution involves folding and storing the item to one side. As we all know, the internal layout of a building is irregular. Therefore, when facing a large angle, this solution cannot achieve unidirectional folding and storage, which affects usability and fails to meet actual usage needs. Utility Model Content
[0007] The present invention aims to solve the problems mentioned in the background art by providing a magnetic positioning structure for a foldable smoke curtain.
[0008] The specific technical solution is as follows:
[0009] A magnetic positioning structure for a foldable smoke curtain includes a mounting base plate, a storage cover at the bottom of the mounting base plate, a foldable smoke curtain body fixedly mounted inside the storage cover, the top of the foldable smoke curtain body extending to the bottom of the mounting base plate, and multiple fixing mechanisms provided on the front and rear sides of the mounting base plate.
[0010] The fixing mechanism includes multiple electromagnets disposed on the front and rear sides of the bottom of the mounting base and a connecting metal disposed on the top of the storage cover corresponding to the electromagnets, wherein the connecting metal is attracted to the electromagnets.
[0011] As a preferred embodiment of this utility model, a first bolt is inserted at the bottom of the storage cover, and the top of the first bolt penetrates into the interior of the connecting metal and is connected to the connecting metal by a threaded rotation.
[0012] In a preferred embodiment of this utility model, four second bolts are inserted inside the electromagnet, and the top of the second bolts penetrates into the interior of the mounting base plate and is connected to the mounting base plate by a threaded rotation.
[0013] In a preferred embodiment of this utility model, a first connecting plate is fixedly installed on both the front and rear sides of the mounting base plate, two smoke sensors are fixedly installed on the bottom of the first connecting plate, and a third bolt is inserted through the inside of the first connecting plate.
[0014] As a preferred embodiment of this utility model, four limiting rods are fixedly installed at the bottom of the mounting base, and a limiting cylinder is fixedly installed on the inner side of the storage cover, with the limiting rods penetrating into the interior of the limiting cylinder.
[0015] As a preferred embodiment of this utility model, a second connecting plate is fixedly installed on the top of the foldable smoke curtain body, and a plurality of fourth bolts are interspersed inside the second connecting plate. The top of the fourth bolts penetrates into the interior of the mounting base plate and is connected to the mounting base plate by a threaded rotation.
[0016] This utility model has the following beneficial effects:
[0017] 1. The magnetic positioning structure of the foldable smoke curtain provided by this utility model has an installation base plate for installing and fixing the foldable smoke curtain body. The foldable smoke curtain body is used to protect the room and prevent smoke from flowing during actual use. The storage cover is used to accommodate the foldable smoke curtain body. In actual use, the foldable smoke curtain body can be pulled down to drop the foldable smoke curtain body and protect the room. This avoids the space occupation of traditional foldable smoke curtain bodies when stored on the side and avoids the problem of not being able to rotate for storage at corners.
[0018] 2. The magnetic positioning structure of the folding smoke curtain provided by this utility model uses an electromagnet to attract and connect the connecting metal, thereby attracting and fixing the storage cover to store the folding smoke curtain body and reducing the space occupied on the vertical surface. Attached Figure Description
[0019] Figure 1 A schematic diagram of the magnetic positioning structure of the foldable smoke curtain provided in an embodiment of this utility model;
[0020] Figure 2 A schematic diagram of the storage cover structure of the magnetic positioning structure of the folding smoke curtain provided in the embodiment of this utility model;
[0021] Figure 3 A schematic diagram of the mounting base structure of the magnetic positioning structure of the folding smoke curtain provided in this embodiment of the utility model;
[0022] Figure 4 A schematic diagram of the electromagnet structure for the magnetic positioning structure of the folding smoke curtain provided in this embodiment of the utility model.
[0023] In the attached diagram: 1. Mounting base plate; 2. Storage cover; 3. Fixing mechanism; 301. Electromagnet; 302. Connecting metal; 303. First bolt; 304. Second bolt; 4. Third bolt; 5. Foldable smoke curtain body; 6. Smoke sensor; 7. First connecting plate; 8. Fourth bolt; 9. Second connecting plate; 10. Limiting rod; 11. Limiting cylinder. Detailed Implementation
[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] Example
[0029] The magnetic positioning structure of the foldable smoke curtain provided in this embodiment is as follows: Figures 1-4 As shown, the device includes a mounting base 1, a storage cover 2 at the bottom of the mounting base 1, and a foldable smoke curtain body 5 fixedly mounted inside the storage cover 2. The top of the foldable smoke curtain body 5 extends to the bottom of the mounting base 1. Multiple fixing mechanisms 3 are provided on the front and rear sides of the mounting base 1. The mounting base 1 is used to install and fix the foldable smoke curtain body 5. The foldable smoke curtain body 5 is used to protect the room and prevent smoke from flowing during actual use. The storage cover 2 is used to accommodate the foldable smoke curtain body 5. In actual use, the foldable smoke curtain body 5 can be pulled down to drop it and protect the room. This avoids the space occupied by the side storage of the traditional foldable smoke curtain body 5 and the problem of not being able to rotate and store it at corners.
[0030] The fixing mechanism 3 includes multiple electromagnets 301 disposed on the front and rear sides of the bottom of the mounting base plate 1 and a connecting metal 302 disposed on the top of the storage cover 2 corresponding to the electromagnets 301. The connecting metal 302 and the electromagnets 301 are attracted together. The electromagnets 301 are used to attract and connect the connecting metal 302, thereby attracting and fixing the storage cover 2 to store the foldable smoke curtain body 5 and reduce the space occupied on the vertical surface.
[0031] The bottom of the storage cover 2 is provided with a first bolt 303, the top of the first bolt 303 penetrates into the interior of the connecting metal 302 and is connected to the connecting metal 302 by a threaded rotation. The first bolt 303 is used to fix the connecting metal 302 to the top of the storage cover 2 to facilitate subsequent fixation of the storage cover 2.
[0032] The electromagnet 301 has four second bolts 304 inserted inside. The top of the second bolts 304 penetrates into the interior of the mounting base plate 1 and is connected to the mounting base plate 1 by a threaded rotation. The second bolts 304 are used to fix the electromagnet 301 to the bottom of the mounting base plate 1 so that the connecting metal 302 can be attracted to achieve storage and fixation of the storage cover 2. The model of the electromagnet 301 is ELE-P20 / 15.
[0033] The mounting base plate 1 has a first connecting plate 7 fixedly installed on both the front and rear sides. Two smoke sensors 6 are fixedly installed on the bottom of the first connecting plate 7. A third bolt 4 is inserted inside the first connecting plate 7. The first connecting plate 7 is used to install the smoke sensors 6. The smoke sensors 6 are model YJ-115. The third bolt 4 is used to install the mounting base plate 1 to the top of the building to facilitate the overall installation and subsequent smoke blocking.
[0034] Four limiting rods 10 are fixedly installed at the bottom of the mounting base plate 1, and a limiting cylinder 11 is fixedly installed on the inner side of the storage cover 2. The limiting rods 10 penetrate into the interior of the limiting cylinder 11. The limiting rods 10 and the limiting cylinder 11 are used to limit the storage cover 2 when it is stored, so as to prevent it from being touched during actual use, which would cause the connecting metal 302 to detach from the electromagnet 301 and cause the foldable smoke curtain body 5 to fall off.
[0035] The top of the foldable smoke curtain body 5 is fixedly installed with a second connecting plate 9. Multiple fourth bolts 8 are inserted inside the second connecting plate 9. The top of the fourth bolts 8 penetrates into the interior of the mounting base plate 1 and is connected to the mounting base plate 1 by a threaded rotation. The fourth bolts 8 and the second connecting plate 9 are used to fix the foldable smoke curtain body 5 to the bottom of the mounting base plate 1, thereby realizing the installation of the foldable smoke curtain body 5.
[0036] In use, the mounting base plate 1 is placed on the top of the building and inserted into the first connecting plate 7 through the third bolt 4, and then fixed inside the building. After fixing, the storage cover 2 is placed at the bottom of the mounting base plate 1. The electromagnet 301 is energized, and the storage cover 2 is moved upward so that the connecting metal 302 is attached to the bottom of the electromagnet 301 and attracted to it. At the same time, the limiting rod 10 penetrates into the limiting cylinder 11. After attraction, it is ready to be activated. In actual use, if smoke is generated during a fire... The smoke sensor 6 detects the smoke and transmits the data. Then, the electromagnet 301 is de-energized, causing the connecting metal 302 to detach from its restraint. Under the gravity of the storage cover 2, the storage cover 2 pulls the foldable smoke curtain body 5 down and unfolds. After unfolding, the smoke is collected. After use, the electromagnet 301 is energized, and the storage cover 2 is lifted, so that the connecting metal 302 contacts and attracts the electromagnet 301. At the same time, the limiting rod 10 passes through the interior of the limiting cylinder 11 for subsequent use.
[0037] Among them, the smoke sensor 6 is electrically connected to the controller, and the controller is electrically connected to the electromagnet 301. The controller can be a DSP controller of model TMS320F2812.
[0038] The control circuit connection scheme for the magnetic positioning structure of the folding smoke curtain is as follows:
[0039] I. Overall Circuit Architecture
[0040] The entire control circuit is based on a TMS320F2812 DSP controller, which realizes the acquisition and processing of smoke sensor signals and the control of the electromagnet's power on and off. The circuit is mainly divided into three parts: signal acquisition module, control processing module, and execution drive module. Among them, the smoke sensor 6 is responsible for collecting smoke signals and transmitting them to the controller. After analyzing and processing the signals, the controller sends power on / off commands to the electromagnet 301, thereby realizing the automatic release and retraction control of the foldable smoke curtain body 5.
[0041] II. Specific connection schemes for each module
[0042] (a) Signal acquisition module (connection between smoke sensor and controller)
[0043] Smoke sensor selection and compatibility: The selected YJ-115 smoke sensor is typically an analog output type, with an output voltage signal range generally between 0-5V (refer to the sensor manual for details). This sensor has one power supply positive pin (VCC), one ground pin (GND), and one signal output pin (OUT).
[0044] Connection method with controller:
[0045] Connect the VCC pin of the smoke sensor to the 5V power supply terminal of the controller through a 5V regulated power supply module to provide a stable operating voltage for the sensor.
[0046] The smoke sensor's GND pin is directly connected to the controller's ground terminal (GND) to ensure common ground.
[0047] The signal output pin (OUT) of the smoke sensor is connected to an analog input pin (e.g., ADCIN00) of the TMS320F2812 controller. Since the controller's ADC input range is 0-3V, a voltage divider resistor circuit (e.g., two precision resistors R1=2kΩ and R2=3kΩ connected in series, with the signal input to the controller from the midpoint between the two resistors) is connected in series between the sensor output pin and the controller's ADC input pin to convert the 0-5V signal output by the sensor to 0-3V, thus matching the controller's ADC input range.
[0048] (ii) Control processing module (internal configuration of the controller)
[0049] ADC Configuration: In the software programming of the TMS320F2812 controller, the ADC module needs to be initialized and configured. Parameters such as the ADC sampling period, sampling channel (corresponding to the ADCIN00 pin connected to the smoke sensor), and conversion mode (e.g., continuous conversion mode) are set to ensure that the controller can accurately acquire the analog signal from the smoke sensor and convert it into a digital signal for subsequent processing.
[0050] Threshold judgment and logic control: A smoke concentration alarm threshold is preset in the controller program (for example, an alarm is triggered when the actual smoke concentration corresponding to the digital value converted by the ADC reaches a certain set value). When the collected smoke signal exceeds the threshold, the controller outputs a low-level control signal through its GPIO pin (such as GPIO0) (by default, a high level indicates that the electromagnet is energized, and a low level indicates that it is de-energized).
[0051] (iii) Execution drive module (controller connected to electromagnet)
[0052] Electromagnet drive circuit: Since the GPIO pin output current of the TMS320F2812 controller is small (usually a few milliamps), it cannot directly drive the electromagnet 301 (the ELE-P20 / 15 model electromagnet requires a larger drive current). Therefore, a power drive circuit needs to be designed.
[0053] An NPN power transistor (such as TIP122) is used as the driving element. The controller's GPIO0 pin is connected to the base of the transistor, and a current-limiting resistor (such as R3=1kΩ) is connected in series to prevent excessive current from damaging the controller pin.
[0054] The collector of the transistor is connected to one end of the electromagnet 301, and the other end of the electromagnet is connected to the positive terminal of the DC power supply (selected according to the rated voltage of the electromagnet, such as 12V or 24V, provided by the power supply module).
[0055] The emitter of the transistor is grounded, and a freewheeling diode (such as 1N4007) is connected in reverse parallel across the electromagnet to absorb the reverse electromotive force generated when the electromagnet is de-energized, thus protecting the circuit components.
[0056] Power Management: To ensure stable operation of the electromagnet, a dedicated high-power power supply module is required. The power output voltage and current must meet the rated operating requirements of the electromagnet (refer to the technical parameters of electromagnet ELE-P20 / 15). Simultaneously, the controller uses an independent 5V power supply module to prevent current fluctuations during electromagnet operation from affecting the normal operation of the controller.
[0057] III. Circuit Protection and Optimization
[0058] Filtering circuit: Add RC filter circuits (such as resistor R4=100Ω and capacitor C1=0.1μF in series) to the power input and signal output terminals of the smoke sensor to filter out power supply noise and signal interference, and improve the accuracy of sensor signal acquisition.
[0059] Isolation design: Optical isolation components (such as PC817) can be added between the controller and the drive circuit to electrically isolate the control circuit from the power circuit, thereby enhancing the system's anti-interference capability and safety.
[0060] The above control circuit connection scheme enables the complete logic from the smoke sensor detection signal to the electromagnet power control, ensuring that the foldable smoke curtain can be deployed in a timely and reliable manner in the event of a fire, thus playing its role in blocking smoke.
[0061] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A magnetic positioning structure for a foldable smoke curtain, characterized in that, The mounting base (1) includes a storage cover (2) at the bottom of the mounting base (1), a foldable smoke curtain body (5) is fixedly installed inside the storage cover (2), the top of the foldable smoke curtain body (5) extends to the bottom of the mounting base (1), and multiple fixing mechanisms (3) are provided on the front and rear sides of the mounting base (1). The fixing mechanism (3) includes a plurality of electromagnets (301) disposed on the front and rear sides of the bottom of the mounting base plate (1) and a connecting metal (302) disposed on the top of the storage cover (2) corresponding to the electromagnets (301), wherein the connecting metal (302) is attracted to the electromagnets (301).
2. The magnetic positioning structure of the foldable smoke screen vertical wall according to claim 1, wherein, The bottom of the storage cover (2) is provided with a first bolt (303), the top of the first bolt (303) penetrates into the interior of the connecting metal (302) and is connected to the connecting metal (302) by a threaded rotation.
3. The magnetic positioning structure of the foldable smoke screen vertical wall according to claim 1, wherein, The electromagnet (301) has four second bolts (304) inserted inside it. The top of the second bolts (304) penetrates into the interior of the mounting base plate (1) and is connected to the mounting base plate (1) by a threaded rotation.
4. The magnetic positioning structure of the foldable smoke screen vertical wall according to claim 3, wherein, The mounting base plate (1) is fixedly mounted on both the front and rear sides of the first connecting plate (7). Two smoke sensors (6) are fixedly mounted on the bottom of the first connecting plate (7). A third bolt (4) is inserted inside the first connecting plate (7).
5. The magnetic positioning structure of the foldable smoke screen vertical wall according to claim 4, wherein, Four limiting rods (10) are fixedly installed at the bottom of the mounting base (1), and a limiting cylinder (11) is fixedly installed on the inner side of the storage cover (2). The limiting rods (10) penetrate into the interior of the limiting cylinder (11).
6. The magnetic positioning structure of the foldable smoke screen vertical wall according to claim 5, wherein, The top of the foldable smoke curtain body (5) is fixedly installed with a second connecting plate (9). Multiple fourth bolts (8) are interspersed inside the second connecting plate (9). The top of the fourth bolts (8) penetrates into the interior of the mounting base plate (1) and is connected to the mounting base plate (1) by a threaded rotation.