A fire warning device for a pipe shaft

Abstract

This utility model relates to the field of fire early warning technology, and discloses a fire early warning device for pipeline wells, including a detection platform, a smoke guide plate, a lifting support bracket, and a smoke detector. The smoke detector is installed inside the detection platform; the smoke guide plate is rotatably connected to the outer side wall of the detection platform via the lifting support bracket, so that the smoke guide plate, the lifting support bracket, and the detection platform together form a collection chamber for converging and guiding smoke. The smoke guide plate can adopt an arc-shaped plate or inclined plate structure, including a main guide plate, side guide plates, and a sliding extension plate to expand the smoke collection range. The collection chamber and the storage chamber are separated inside the detection platform by a vertical partition. The lifting support bracket includes a second sliding groove, a movable block, a rotating rod, and a rotating motor, which drives the automatic flipping control of the smoke guide plate. This utility model can effectively converge and diffuse smoke, significantly improve smoke detection sensitivity and response speed, solve the problem of difficult timely early warning of smoke in pipeline wells, and also has the advantages of stable structure and easy installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of fire early warning technology, and more specifically, to a fire early warning device for pipeline wells. Background Technology

[0002] With the rapid development of the social economy and the continuous improvement of informatization, the number of low-voltage cables (including network, telephone, and monitoring systems) inside high-rise buildings such as office buildings and data centers has increased dramatically, and their laying density has increased significantly. These cables are usually laid vertically in the pipe shafts inside the building. As a key vertical passage in high-rise buildings, the pipe shaft functions similarly to an elevator shaft, mainly used for laying power supply or communication cables. Usually, for safety reasons, high-voltage and low-voltage cables are laid separately.

[0003] Automatic fire alarm systems are key facilities for ensuring the safety of high-rise buildings. Fire warning devices (such as smoke detectors) are used to receive, display and transmit fire alarm signals, and issue control commands to activate auxiliary functions.

[0004] However, the utility shaft runs from the ground floor to the top floor of a building, forming a perfect vertical channel. If a cable overheats or smolders somewhere within the shaft, the localized heat greatly exacerbates this effect, causing a strong and faster upward airflow in that area. When the cable in the shaft overheats or smolders due to overload, aging, or short circuit, the resulting trace amount of smoke is rapidly diluted and drawn upwards by the high-speed airflow before it reaches the alarm threshold of a traditional point-type smoke detector, preventing smoke from effectively accumulating around the detector. Therefore, traditional detectors struggle to respond promptly in the early stages of a fire, posing a risk of alarm delays or even missed alarms.

[0005] Currently, most common smoke detectors alarm based on particulate matter concentration thresholds. Since smoke detectors are often installed on the walls of pipe shafts, when a fire occurs, the smoke is affected by the continuous high-speed airflow generated by the strong "chimney effect" in the shaft, making it difficult for the smoke to accumulate effectively in the detector's monitoring area. This results in the detector being unable to quickly capture a sufficient concentration of smoke particles, causing detection delays or missed alarms.

[0006] Therefore, there is an urgent need for a new technical solution that can adapt to the special environment of pipeline shafts and realize early smoke detection and fire warning, so as to make up for the shortcomings of existing fire alarm systems in this application scenario and improve the safety protection level of high-rise buildings. Utility Model Content

[0007] The purpose of this invention is to provide a fire early warning device for pipeline wells.

[0008] A fire early warning device for a pipe well includes: a detection platform, a smoke guide plate, a support bracket, and a smoke detector; The testing station is equipped with a smoke detector. The smoke guide plate is rotatably connected to the outer side wall of the detection platform via a lifting support bracket, so that the smoke guide plate, the lifting support bracket and the detection platform together form a collection cavity for gathering and guiding smoke.

[0009] Furthermore, the smoke guide plate is an arc-shaped plate or an inclined plate.

[0010] Furthermore, the testing station is equipped with several partitions arranged vertically at intervals, dividing the testing station into a collection chamber and a storage chamber.

[0011] Furthermore, the smoke guide plate includes a main guide plate, a side guide plate, and an extension plate; Both the side guide plate and the extension plate are connected below the main guide plate to expand the volume of the collection chamber and the smoke collection range.

[0012] Furthermore, the end of the smoke guide plate is provided with a first sliding groove, and the extension plate is inserted into the first sliding groove by a slider structure and can slide along the first sliding groove.

[0013] Furthermore, one end of the side guide plate is movably connected to the side of the main guide plate, and the other end is used to abut against the upper opening of the collection chamber to guide the smoke guided by the main guide plate into the lower area of ​​the smoke detector.

[0014] Preferably, the output end of the rotary motor is connected to the rotary rod via a position sensor or encoder; by detecting the feedback rotation angle signal from the position sensor or encoder, the rotary motor is controlled to start or stop, and its rotation is controlled to a specified angle to adjust the flipping state of the smoke guide plate.

[0015] Furthermore, the lifting support bracket includes a second sliding groove, a movable block, a rotating rod, and a rotating motor; The second groove is fixedly disposed on the side of the smoke guide plate; The rotary motor is fixedly mounted on the testing platform, and its output end is connected to the rotating rod via a transmission connection. The rotating rod is fixedly connected to one end of the movable block, and the other end of the movable block is movably disposed in the second sliding groove; The rotary motor drives the rotating rod to rotate, and then, through the movement of the movable block in the second slide groove, drives the smoke guide plate to flip outward.

[0016] Furthermore, the rotary motor is a servo motor or a stepper motor.

[0017] Furthermore, the detection platform is also equipped with an alarm light for detecting fires.

[0018] Furthermore, the outer housing of the smoke detector is provided with external threads, and a screw hole is provided on the partition above the collection chamber. The smoke detector is fixedly installed on the partition by the cooperation of the external threads and the screw hole.

[0019] Compared with the prior art, the beneficial effects of this utility model's technical solution are: 1. The flip-up smoke guide plate, together with the detection platform and support bracket, forms a funnel-shaped collection chamber, which can effectively gather the smoke spreading in the pipe shaft and concentrate the sparse smoke to the location of the smoke detector. This greatly improves the detection sensitivity and response speed of the initial fire and solves the problem that smoke is easy to spread in the pipe shaft space and traditional detectors are difficult to warn in the early stage.

[0020] 2. The interior of the testing station is divided into a collection chamber and a storage chamber by vertical partitions. This not only ensures the channel for smoke to gather, but also provides an independent protective space for smoke detectors and other circuit components that may be installed, avoiding dust accumulation and accidental collisions, and enhancing the stability and service life of the equipment.

[0021] 3. The smoke plate adopts a combination design of main plate, side guide plate and extension plate. The extension plate can slide through the sliding groove structure and the side guide plate can move and abut, so that the volume of the collection chamber and the smoke collection range can be flexibly adjusted and expanded according to the actual space size of different pipe wells, which significantly improves the versatility and adaptability of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the installation of the fire early warning device of this utility model; Figure 2 This is a schematic diagram of the structure of the fire early warning device of this utility model with the smoke guide plate open. Figure 3 This is an enlarged schematic diagram of A of this utility model; Figure 4 This is a side view of the smoke guide plate of the fire early warning device of this utility model when it is open. Figure 5 This is a schematic diagram of the closed smoke guide plate structure of the fire early warning device of this utility model; Figure 6 This is a side view of the smoke guide plate of the fire early warning device of this utility model when closed; Figure 7 This is a schematic diagram of the structure of the smoke detector of this utility model; in: 1. Testing table; 101. Collection chamber; 102. Storage chamber; 103. Partition; 2. Smoke guide plate; 201. Main guide plate; 202. Side guide plate; 203. Extension plate; 204. First slide groove; 3. Lifting support bracket; 301. Second slide rail; 302. Movable block; 303. Rotating rod; 304. Rotary motor; 4. Smoke detector; 5. Alarm light; 6. Pipe well wall. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments without creative effort are within the scope of protection of this application.

[0024] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Example 1 like Figure 1-7 This embodiment discloses a fire early warning device for pipeline wells.

[0026] A fire early warning device for a pipe well includes: a detection platform 1, a smoke guide plate 2, a support bracket 3, and a smoke detector 4; The testing station 1 is equipped with a smoke detector 4; The smoke guide plate 2 is rotatably connected to the outer side wall of the detection platform 1 via the lifting support bracket 3, so that the smoke guide plate 2, the lifting support bracket 3 and the detection platform 1 together form a collection chamber 101 for gathering and guiding smoke.

[0027] The smoke guide plate 2 is an arc-shaped plate or an inclined plate.

[0028] The testing table 1 is provided with several partitions 103, which are arranged vertically at intervals to divide the testing table 1 into a collection chamber 101 and a storage chamber 102.

[0029] The smoke guide plate 2 includes a main guide plate 201, a side guide plate 202, and an extension plate 203; The side guide plate 202 and the extension plate 203 are both connected below the main guide plate 201 to expand the volume and smoke collection range of the collection cavity 101.

[0030] The end of the smoke guide plate 2 is provided with a first sliding groove 204. The extension plate 203 is inserted into the first sliding groove 204 by a slider structure and can slide along the first sliding groove 204.

[0031] One end of the side guide plate 202 is movably connected to the side of the main guide plate 201, and the other end is used to abut against the upper opening of the collection chamber 101 to guide the smoke guided by the main guide plate 201 into the lower area of ​​the smoke detector 4.

[0032] Specifically, the testing station 1 is bolted to the pipe well wall 6.

[0033] When the device is powered on or receives an initialization command, the rotary motor 304 starts working, driving the rotary rod 303 to rotate. The rotary rod 303 drives the movable block 302 fixed to it to move. Since the other end of the movable block 302 can move within the second sliding groove 301 fixed to the side of the smoke guide plate 2, the rotational motion of the motor is converted into the outward flipping motion of the smoke guide plate 2, so that it unfolds from the retracted state of fitting the detection table 1 to the working angle, forming a funnel-shaped collection cavity 101 together with the detection table 1 and the lifting support 3, thereby expanding the volume and smoke collection range of the collection cavity 101.

[0034] When smoke is generated inside the pipe shaft due to a potential fire, the smoke spreads upwards due to air convection. The deployed smoke guide plate 2 (especially its main guide plate 201 with an arc or inclined plate structure) can effectively intercept and gather the spreading smoke; One end of the side guide plate 202 is movably connected to the main guide plate 201, and the other end abuts against the partition plate 103 above the collection chamber 101, thereby increasing the volume and smoke collection range of the collection chamber 101, further constraining the smoke flow direction, preventing it from escaping laterally, and jointly guiding and concentrating the smoke into the collection chamber 101 at the bottom of the detection platform 1.

[0035] The smoke that gathers in the collection chamber 101 continues to rise and eventually reaches the detection range of the smoke detector 4, which is fixedly installed on the screw hole of the partition 103. Because the smoke is effectively concentrated, its concentration is higher than that of the environment, enabling the smoke detector 4 to detect even the faint smoke particles with extreme sensitivity, thereby achieving early warning of fire.

[0036] When smoke detector 4 detects that the smoke concentration exceeds the preset alarm threshold, it immediately triggers an alarm signal. This signal, on the one hand, drives the alarm light 5 installed on the detection platform 1 to activate, emitting a strong flashing warning, providing on-site personnel with a direct local fire alarm.

[0037] Throughout the operation or at the beginning of deployment, the smoke collection range can be flexibly adjusted according to the actual size of the manhole. The volume and flow guiding effect of the collection chamber 101 can be expanded or optimized by manually sliding the extension plate 203 (which adjusts the extension length by moving the slider within the first groove 204) and adjusting the abutment angle of the side guide plate 202, ensuring good adaptability to different environments.

[0038] As one embodiment, the lifting support 3 includes a second slide 301, a movable block 302, a rotating rod 303, and a rotating motor 304; The second chute 301 is fixedly installed on the side of the smoke guide plate 2; The rotary motor 304 is fixedly mounted on the testing table 1, and its output end is connected to the rotating rod 303 for transmission. The rotating rod 303 is fixedly connected to one end of the movable block 302, and the other end of the movable block 302 is movably disposed in the second slide groove 301; The rotary motor 304 drives the rotating rod 303 to rotate, and then, through the movement of the movable block 302 in the second slide groove 301, drives the smoke guide plate 2 to flip outward.

[0039] Rotary motor 304 is either a servo motor or a stepper motor.

[0040] Specifically, when the device is powered on and receives an unfolding command or an automatic start signal, the rotary motor 304 (servo motor or stepper motor) fixedly mounted on the testing table 1 starts, and its output shaft begins to rotate precisely.

[0041] When the output shaft of the rotary motor 304 rotates, it drives the connected rotating rod 303 to rotate synchronously through transmission components such as couplings. When the rotating rod 303 rotates, since one end of the movable block 302 is fixedly connected to the rotating rod 303, the movable block 302 is driven by the rotating rod 303 to make circular motion with a fixed radius.

[0042] When the movable block 302 makes a circular motion, its other end is constrained in the second slide groove 301 fixed to the side of the smoke guide plate 2. This motion constraint transforms the circular motion of the rotating rod 303 into a combined motion of sliding and lifting of the movable block 302 in the second slide groove 301.

[0043] When the movable block 302 slides within the second slide groove 301 and pushes outward, it applies a force to the slide groove wall. Since the second slide groove 301 is fixed to the smoke guide plate 2, this force is converted into a torque that drives the smoke guide plate 2 to rotate outward around its hinge point with the detection table 1, thereby smoothly pushing the smoke guide plate 2 from its retracted state against the detection table 1 to the predetermined working angle.

[0044] Throughout the entire flipping process, since the rotary motor 304 is a servo motor or a stepper motor, the controller can indirectly and precisely control the final flipping angle and unfolding speed of the smoke guide plate 2 by precisely controlling the rotation angle and speed of the motor, ensuring that it can stably and reliably form the optimal smoke collection chamber shape.

[0045] Example 2 like Figure 1-7 As shown, this embodiment provides a fire early warning device for pipeline wells, with a technical solution similar to that of Embodiment 1, except that: As one embodiment, the detection station 1 is also equipped with an alarm light 5 for detecting fires.

[0046] Specifically, when the smoke detector 4 continuously monitors the smoke concentration in the collection chamber 101 and determines that it is in a normal state, the alarm light 5 is in a sleep or standby state. At this time, the alarm light 5 does not emit any warning light, and the device is in a quiet monitoring state.

[0047] When fire smoke appears in the pipe well and is gathered into the collection chamber 101 by the smoke guide plate 2, the sensing element of the smoke detector 4 detects smoke particles, and its internal circuit detects that the smoke concentration exceeds the preset alarm threshold.

[0048] Once the smoke detector 4 confirms the fire alarm signal, it will immediately generate an electrical alarm signal and transmit this signal to the alarm light 5 connected to it through the internal circuit.

[0049] After receiving a trigger signal from the smoke detector 4, the internal control circuit of the alarm light 5 is instantly activated, driving the high-brightness LED beads or bulbs to start working.

[0050] When alarm light 5 is activated, it emits a strong, flashing red light (or other specific warning color). This light signal is highly visible even in dimly lit or smoke-filled manhole environments, thus providing a clear and intuitive visual alarm for personnel above the manhole.

[0051] As one embodiment, the smoke guide plate 2 is an inclined plate.

[0052] Specifically, when the lifting support 3 drives the smoke guide plate 2 to flip outward from the side wall of the detection platform 1, since it is pre-designed as an inclined plate structure, it can naturally form a funnel-shaped collection cavity 101 with an inclined angle and a gradually narrowing cross section with the vertical well wall and the side wall of the detection platform 1 after unfolding. When smoke is generated in the pipe shaft due to a potential fire and spreads upwards, the inclined smoke guide plate 2 can effectively intercept and guide the rising smoke with a large inclination. Its inclined structure can convert part of the kinetic energy of the vertically rising smoke into the function of converging inwards along the plate surface, thereby guiding the smoke more gently and concentratedly to the inlet of the collection chamber 101 at the bottom of the detection platform 1, effectively reducing the rebound and escape of the smoke.

[0053] The output of the rotary motor 304 is connected to the rotating rod 303 via a position sensor or encoder. By detecting the feedback rotation angle signal from the position sensor or encoder, the rotary motor 304 is controlled to start or stop, and its rotation is controlled to rotate by a specified angle to adjust the flipping state of the smoke guide plate.

[0054] As one embodiment, the output end of the rotary motor 304 is connected to the rotary rod 303 via a position sensor or encoder. The rotary motor 304 can be controlled to rotate in the opposite direction via the position sensor or encoder. Through the transmission of the lifting bracket 3, the smoke guide plate 2 is retracted to the state of adhering to the detection table 1, reducing the size of the device and cutting off the alarm of the alarm light 5.

[0055] Example 3 like Figure 1-7 As shown, this embodiment provides a fire early warning device for pipeline wells, with a technical solution similar to that of Embodiment 1, except that: As one embodiment, the smoke guide plate 2 is an arc-shaped plate.

[0056] Specifically, when the lifting support 3 drives the smoke guide plate 2 to flip and unfold outward, its unique arc-shaped plate structure moves accordingly, forming a smoothly transitioned, bowl-shaped or trumpet-shaped collection cavity 101 inlet. This arc-shaped surface can cover a wider solid angle, providing a better interception and receiving surface for smoke diffusing from different directions; As the smoke in the manhole spreads upwards and outwards, the curved surface of the arc-shaped smoke guide plate 2 can capture the smoke more effectively from multiple directions. Compared to a flat inclined plate, the arc-shaped surface can guide the airflow more naturally, allowing the smoke to converge towards the center along the smooth curve, greatly reducing the eddies and rebounds caused by impacting the flat surface, thus guiding the smoke more smoothly and concentratedly into the inlet of the collection chamber 101 at the bottom of the detection platform 1.

[0057] As one embodiment, the outer housing of the smoke detector 4 is provided with external threads, and a screw hole is provided on the partition 103 above the collection chamber 101. The smoke detector 4 is fixedly installed on the partition 103 by the engagement of the external threads and the screw holes. During initial installation... When it is necessary to fix the smoke detector 4 to the partition 103 above the collection chamber 101, the operator aligns the external thread on the detector housing with the pre-drilled screw hole on the partition 103, and rotates the detector to screw it into the screw hole. This threaded connection provides a stable, reliable and precise installation method, ensuring that the sensor head of the smoke detector 4 can be firmly suspended in the optimal detection position directly above the collection chamber 101, and will not loosen or fall off due to vibration or over time.

[0058] When the device is in normal operating monitoring mode, the smoke detector 4 remains in a constant position because it is rigidly fixed to the partition 103 by threads. This ensures that the smoke flow field converged by the smoke guide plate 2 is stable and predictable, and the smoke can flow continuously and accurately to the sensing part of the detector, avoiding the decrease in detection sensitivity or signal fluctuation caused by detector shaking or displacement, thereby ensuring the reliability and consistency of monitoring data.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fire early warning device for pipeline wells, characterized in that, include: The testing platform (1), the smoke guide plate (2), the lifting support bracket (3), and the smoke detector (4); The detection station (1) is equipped with a smoke detector (4). The smoke guide plate (2) is rotatably connected to the outer side wall of the detection platform (1) via the lifting support bracket (3), so that the smoke guide plate (2), the lifting support bracket (3) and the detection platform (1) together form a collection chamber (101) for gathering and guiding smoke.

2. The fire early warning device for pipeline wells according to claim 1, characterized in that, The smoke guide plate (2) is an arc-shaped plate or an inclined plate.

3. The fire early warning device for pipeline wells according to claim 1, characterized in that, The testing station (1) is provided with several partitions (103), which are arranged vertically at intervals to divide the testing station (1) into a collection chamber (101) and a storage chamber (102).

4. The fire early warning device for pipeline wells according to claim 3, characterized in that, The smoke guide plate (2) includes a main guide plate (201), a side guide plate (202) and an extension plate (203); The side guide plate (202) and the extension plate (203) are both connected below the main guide plate (201) to expand the volume and smoke collection range of the collection chamber (101).

5. The fire early warning device for pipeline wells according to claim 4, characterized in that, The end of the smoke guide plate (2) is provided with a first groove (204). The extension plate (203) is inserted into the first groove (204) by a slider structure and can slide along the first groove (204).

6. The fire early warning device for pipeline wells according to claim 4, characterized in that, One end of the side guide plate (202) is movably connected to the side of the main guide plate (201), and the other end is used to abut against the upper opening of the collection chamber (101) to guide the smoke guided by the main guide plate (201) into the area below the smoke detector (4).

7. The fire early warning device for pipeline wells according to claim 1, characterized in that, The lifting support bracket (3) includes a second slide (301), a movable block (302), a rotating rod (303), and a rotary motor (304). The second groove (301) is fixedly disposed on the side of the smoke guide plate (2); The rotary motor (304) is fixedly mounted on the testing platform (1), and its output end is connected to the rotating rod (303) for transmission. The rotating rod (303) is fixedly connected to one end of the movable block (302), and the other end of the movable block (302) is movably disposed in the second slide groove (301); The rotary motor (304) is used to drive the rotating rod (303) to rotate, and then through the movement of the movable block (302) in the second slide groove (301), the smoke guide plate (2) is driven to flip outward.

8. The fire early warning device for pipeline wells according to claim 7, characterized in that, The rotary motor (304) is a servo motor or a stepper motor.

9. The fire early warning device for pipeline wells according to claim 1, characterized in that, The detection station (1) is also equipped with an alarm light (5) for detecting fires.

10. The fire early warning device for pipeline wells according to claim 3, characterized in that, The outer housing of the smoke detector (4) is provided with external threads, and a screw hole is provided on the partition (103) above the collection chamber (101). The smoke detector (4) is fixedly installed on the partition (103) by the cooperation of the external threads and the screw hole.

Images