Indoor gas pipeline leakage active risk monitoring and early warning system, alarm device and alarm method

Abstract

This invention discloses an active risk monitoring and early warning system, alarm device, and alarm method for indoor gas pipeline leaks, belonging to the field of gas monitoring technology. The active risk monitoring and early warning system for indoor gas pipeline leaks includes a monitoring and early warning mechanism installed between an upstream and downstream pipeline. This mechanism includes: a protective shell fitted over the outside of the connection point between the upstream and downstream pipelines; a closing valve installed on the upstream pipeline, with a return torsion spring between the valve's operating handle and the upstream pipeline; a positioning component housed within the protective shell to confine the operating handle within the shell; and a continuous alarm component housed within the protective shell. This invention converts the pressure of a gas leak into a valve-closing driving force and utilizes stored chemical energy to achieve long-term alarm performance, constructing a physical safety barrier independent of the power grid, greatly improving the safety of indoor gas use.

Description

Technical Field

[0001] This invention relates to the field of gas monitoring technology, and in particular to an active risk monitoring and early warning system, alarm device, and alarm method for indoor gas pipeline leaks. Background Technology

[0002] Gas pipelines are an essential facility in residential buildings, and their installation requires extremely high standards to ensure safety during gas use. After installation, gas pipelines must be properly protected and must not be dismantled, moved, bumped, smashed, squeezed, or pressed without authorization to ensure their integrity and prevent damage. Gas leaks are highly likely to occur due to aging of gas appliances such as gas stoves and gas water heaters, aging of branch pipes, or improper or inadequate installation.

[0003] Gas leaks mostly occur at the connection points of two pipelines, and it is difficult to issue timely warnings when a gas leak occurs. If maintenance is not carried out in time, large-scale gas leaks can easily occur, posing a significant safety hazard. Among the existing gas sensors used for gas leak detection, semiconductor sensors account for a large proportion, but they generally have disadvantages such as long response time, low accuracy, and low sensitivity; moreover, the sensors require electricity to detect leaks, and in the event of a sudden power outage, the sensors cannot function, thus failing to provide warnings. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing technologies such as reliance on electricity, slow response, short alarm duration, and ambiguous location of indoor gas pipeline leaks. The invention proposes an active risk monitoring and early warning system, alarm device, and alarm method for indoor gas pipeline leaks. By mechanically linking valve closure and alarm triggering, it achieves seamless connection between leak-valve closure-alarm, while also taking into account both scenarios with and without electricity, and adapting to complex indoor usage environments.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: the protective shell sealing and positioning structure, the pure mechanical pressure-magnetic linkage positioning component, the torsion spring automatic valve closing structure, and the multi-stage gravity relay chemical gas generation alarm component are highly integrated into the same device. Relying only on the pressure generated by the gas leak as the triggering power, it can achieve the entire process of accurately locating the leak point, automatically cutting off the gas source, providing continuous chemical alarm for several hours, and providing dual (mechanical + electrical) early warning. It is an organic and synergistic system formed to address the specific technical problems of indoor gas pipeline leaks, power outage failure, short alarm duration, ambiguous positioning, and high risk of diffusion.

[0006] An indoor gas pipeline leak proactive risk monitoring and early warning system, comprising a monitoring and early warning mechanism installed between the upstream and downstream pipelines, characterized in that the monitoring and early warning mechanism includes: A protective shell, which is fitted onto the outside of the connection point between the upstream and downstream pipelines; A closing valve is provided on the upstream pipeline, and a return torsion spring is provided between the operating handle of the closing valve and the upstream pipeline; A positioning component, disposed within a protective housing, is used to confine the operating handle within the protective housing; And a continuous alarm component, which is disposed within the protective housing and is used to continuously issue an alarm after the closed valve shuts off the upstream pipeline; When a gas leak occurs at the connection between the upstream and downstream pipelines, the positioning component automatically releases the restriction on the operating handle, causing the closing valve to automatically disconnect the connection between the upstream and downstream pipelines.

[0007] Preferably, the protective shell includes a first shell and a second shell with mounting holes. Sealing gaskets are provided on the mating surfaces of the first shell and the second shell as well as on the inner wall of the mounting holes. Ear plates are provided on both the first shell and the second shell, and fastening bolts are provided between the two ear plates.

[0008] Preferably, the positioning component includes a fixing groove formed on the first housing, a limiting post slidably connected in the fixing groove, and a first elastic element disposed between the limiting post and the inner wall of the fixing groove, and the operating handle is provided with a limiting hole that cooperates with the limiting post.

[0009] Preferably, the first housing has a receiving groove that communicates with the fixing groove, and the limiting post has a force-bearing inclined surface on the side away from the first elastic element that abuts against the movement of the operating handle.

[0010] Preferably, the positioning assembly further includes a sealed cavity opened in the first housing, a swing rod rotatably connected to the sealed cavity via a pin, and a magnetic block movably disposed at one end of the swing rod and magnetically engaged with the limiting post. The magnetic block and the limiting post are magnetically repelled. A rubber diaphragm is provided on the inner wall of the first housing, and a second torsion spring for driving the swing rod to reset and rotate is provided on the pin. When a gas leak occurs at the junction of the upstream and downstream pipes, the leaked gas fills the cavity formed by the first and second shells. The rubber diaphragm deforms under force and moves against the end of the swing rod away from the magnetic block.

[0011] Preferably, the first housing has a placement groove, and a sealing plate is hinged to the placement groove. A plurality of exhaust chambers are arranged sequentially from top to bottom in the placement groove. The continuous alarm component includes a gas generating part disposed in each exhaust chamber, a gas distribution groove disposed in the first housing and connected to each exhaust chamber in a one-to-one correspondence, a vertical groove connecting the plurality of gas distribution grooves, and an exhaust groove disposed at the end of the vertical groove. A miniature air whistle is disposed in the exhaust groove, and a one-way valve is disposed at each of the gas distribution grooves.

[0012] Preferably, the gas generating unit includes a movable shell slidably disposed within the exhaust chamber, a cylindrical porous propellant column disposed within the movable shell, a water bag disposed on the upper side of the cylindrical porous propellant column, and a rupture assembly for rupturing the water bag, wherein a rupture assembly is disposed on the upper side of each exhaust chamber.

[0013] Preferably, the rupture assembly includes a sliding groove formed on the exhaust chamber, a sliding plate slidably connected in the sliding groove, a second elastic element disposed between the sliding plate and the inner wall of the sliding groove, a sliding rod disposed on the sliding plate, and a puncture needle disposed at the bottom of the sliding rod. Each sliding groove is provided with a sealing film at its top, the top of the sealing film being movable against the bottom of the operating handle or the movable housing, and the bottom of the sealing film being movable against the top of the sliding rod.

[0014] An active risk alarm device for indoor gas pipeline leaks includes the aforementioned active risk monitoring and early warning system for indoor gas pipeline leaks, and also includes a gas alarm installed on the first housing or the second housing. The gas sensor contact of the gas alarm is located in the cavity enclosed by the first housing and the second housing. A pressure relief valve is also installed on the first housing or the second housing.

[0015] This invention also discloses an indoor gas pipeline leak alarm method, which, by applying the aforementioned indoor gas pipeline leak active risk alarm device, includes the following steps: S1: The protective shell is tightly fitted around the joint of the two pipes by fastening bolts, and the sealing gasket ensures that the cavity is sealed. At this time, the closed valve on the upstream pipeline is in the open state, its operating handle is locked by the positioning component, and the movable shell, water bag, and cylindrical porous drug column in all exhaust chambers of the continuous alarm component are in a static, dry, and separated stable storage state. The puncture needle is pressed down by the operating handle or the upper movable shell and moves away from the water bag. The gas alarm is powered on and continuously monitors the gas composition in the protective shell. S2: Gas leaks from the pipe interface and fills the cavity formed by the protective shell. The gas alarm quickly detects that the gas concentration exceeds the standard and immediately sends a remote electrical signal alarm to the smart home host and the user's mobile phone. S3: The leaking gas causes the pressure inside the protective shell cavity to increase. The pressure acts on the rubber diaphragm, causing it to deform into the sealed cavity and push one end of the swing rod. The swing rod overcomes the torque of the second torsion spring and rotates around the pin. The other end of the swing rod drives the magnetic block to move away from the fixed groove. The magnetic repulsion between the magnetic block and the limiting post weakens rapidly. When the repulsion decreases to less than the pulling force of the first elastic element, the limiting post is pulled back into the fixed groove and thus disengages from the limiting hole of the operating handle. S4: The restriction on the operating handle is lifted, and it rotates at high speed under the torque stored in the reset torsion spring, which drives the valve core of the closed valve to rotate, instantly cutting off the gas supply from the upstream pipeline. The source of leakage is automatically cut off within a few seconds. S5: While the operating handle is rotating to reset, its body no longer abuts against the sealing film of the uppermost sliding groove. The slide bar, which was originally pressed by the operating handle, loses pressure and bounces upward under the action of the second elastic element. The slide bar drives the bottom puncture needle to pierce the water bag in the uppermost exhaust chamber. The water flows into the cylindrical porous medicine column below. The water and medicine react chemically and continuously produce a large amount of carbon dioxide gas. The gas flows through the gas distribution groove and vertical groove to the exhaust groove. When it flows through the miniature whistle, it produces a continuous and sharp alarm sound. S6: The cylindrical porous drug column in the uppermost exhaust chamber is gradually consumed as the reaction proceeds, and its total weight with the residual liquid is continuously reduced. When the weight is reduced to a certain extent, the pressure of the movable shell on the sealing film and slide bar of the second sliding groove is significantly reduced. The slide bar of the second layer then bounces up under the action of its second elastic element, and the puncture needle punctures the water bag of the second layer, starting the chemical reaction and alarm in the second chamber. This process is passed down sequentially, achieving relay alarms in multiple exhaust chambers. The total alarm time can last for several hours. After the user arrives, they open the sealing plate, manually press down the movable shell that has not yet been triggered to prevent further waste of reagents, and perform system reset and maintenance. S7: After the maintenance personnel repair the pipeline leak, they manually turn the operating handle to reopen the closed valve. During the turning process, the operating handle presses against the force-bearing inclined surface of the limit post, causing it to retract. At the same time, the swing rod returns to its original position under the action of the second torsion spring, and the magnetic block approaches the limit post again, pushing it out magnetically and locking it into the limit hole, thus relocking the valve. Then, the consumed gas generating part is replaced, the sealing plate is closed, and the system returns to standby mode.

[0016] Compared with the prior art, the present invention provides an active risk monitoring and early warning system, alarm device and alarm method for indoor gas pipeline leaks, which has the following beneficial effects: 1. In this invention, the leak point is accurately located by sealing the monitoring chamber with the protective shell. The pressure relief valve balances the pressure inside the chamber, effectively limiting the spread of gas and reducing the risk of explosion. This provides a stable pressure triggering basis for subsequent valve closure and alarm. When a leak occurs, gas accumulates in the inner cavity of the protective shell. The pressure acts on the rubber diaphragm, causing it to push the swing rod to rotate. The swing rod drives the magnetic block to move, changing the magnetic repulsion balance between the block and the limiting post. This causes the limiting post to retract under the action of the first elastic element, releasing the locked valve operating handle. The handle automatically closes the valve under the drive of the reset torsion spring. At the same time, the release action of the handle triggers a chemical pneumatic alarm through the puncture needle. The chemical reaction between the porous drug column and water generates a continuous gas to drive the micro gas whistle to sound. The entire process, from sensing, decision-making, valve closure to alarm, requires no electricity, ensuring that the early warning and handling functions never go offline under extreme working conditions, achieving inherent safety under all working conditions. 2. In this invention, pressure is transmitted through a rubber diaphragm, and the force amplification and conversion mechanism composed of a swing rod and a magnetic block converts the static pressure of the gas into the mechanical force required to release the limit. After the limit pin is disengaged from the limit hole of the operating handle, the pre-torsional torsion spring immediately releases its torque, driving the valve core to rotate to the closed position at a speed far exceeding that of manual operation. The source of danger is automatically eliminated before the user is aware of it, and the leakage amount, leakage time and explosion risk are controlled to the minimum. It transforms passive alarm into active protection and realizes rapid self-control of the leakage source. Even in a completely powerless environment, it can still cut off the gas source within seconds, completely eliminating the blind spot of power failure of traditional electric valve closing. At the same time, the magnetic non-contact method avoids mechanical contact corrosion or jamming, significantly improving long-term reliability. 3. In this invention, the combination of multi-stage exhaust chambers, gravity-triggered linkage mechanism, and stable chemical energy storage achieves a multi-chamber relay alarm, providing continuous alarms for hours or even longer. The first puncture needle triggered by valve closure punctures the uppermost water bag, initiating the gas generation alarm from the first chamber's porous chemical column. This chemical column can be designed with a porous pressure column of citric acid and sodium bicarbonate and a water trigger, ensuring a stable and prolonged reaction. When the first chamber's reagent is depleted, the total weight of the movable shell decreases, reducing the pressure on the next layer's puncture needle. The second elastic element in the next layer then pushes the slide bar and puncture needle upwards, triggering the second chamber's reagent, allowing for seamless alarm relay. This time-divided management of limited chemical energy, along with automatic sequential start-stop via mechanical means, ensures that even in the event of a power outage, the system can issue alarms for an extended period after a gas leak, greatly increasing the probability of receiving danger information. It solves the problem of short duration and easy neglect of existing single chemical alarms, significantly improving the probability of timely alarm reception by users. 4. In this invention, by organically combining purely mechanical valve closure, non-electrochemical persistent alarm, and remote early warning via electrical signal from a gas alarm, a dual-level protection is formed, taking into account both inherent safety under extreme power outage conditions and convenience in scenarios with power, resulting in significant safety improvements and enhanced practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic cross-sectional view of the first and second housings of the present invention. Figure 1 ; Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This is a schematic cross-sectional view of the first and second housings of the present invention. Figure 2 ; Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle; Figure 6 This is a schematic diagram of the protective shell of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the protective shell of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the structure of the exhaust groove of the present invention without the movable shell placed therein; Figure 9 This is a schematic cross-sectional view of the first housing of the present invention. Figure 1 ; Figure 10 This is a schematic cross-sectional view of the first housing of the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the internal structure of the movable shell of the present invention.

[0018] In the diagram: 1. Upstream pipe; 2. Downstream pipe; 3. Protective shell; 301. First shell; 3011. Receiving groove; 302. Second shell; 303. Mounting hole; 304. Sealing gasket; 305. Fastening bolt; 4. Closing valve; 401. Operating handle; 4011. Limiting hole; 402. Return torsion spring; 5. Fixing groove; 501. Limiting post; 502. First elastic element; 6. Sealed cavity; 601. Swing rod; 602. Magnetic block; 604. Rubber diaphragm; 7. Placement slot; 701. Sealing plate; 702. Exhaust chamber; 8. Exhaust groove; 801. Gas distribution groove; 802. Vertical groove; 803. Miniature gas whistle; 9. Movable shell; 901. Cylindrical porous dart; 902. Water bag; 10. Sliding groove; 1001. Slide plate; 1002. Slide rod; 1003. Puncture needle; 1004. Second elastic element; 1005. Sealing membrane; 11. Gas alarm; 12. Pressure relief valve. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] like Figure 1 , Figure 2 and Figure 4 As shown, this embodiment proposes an active risk monitoring and early warning system for indoor gas pipeline leaks, including a monitoring and early warning mechanism installed between upstream pipeline 1 and downstream pipeline 2. The monitoring and early warning mechanism comprises: Protective shell 3 is fitted onto the outside of the connection point between upstream pipe 1 and downstream pipe 2; A closing valve 4 is installed on the upstream pipeline 1, and a reset torsion spring 402 is provided between the operating handle 401 of the closing valve 4 and the upstream pipeline 1. A positioning component is disposed within the protective housing 3 and is used to restrict the operating handle 401 within the protective housing 3; And a continuous alarm component, which is housed within the protective housing 3, for continuously issuing an alarm after the closing valve 4 closes the upstream pipeline 1; When a gas leak occurs at the junction of upstream pipe 1 and downstream pipe 2, the positioning component automatically releases the restriction on the operating handle 401, causing the closing valve 4 to automatically disconnect the connection between upstream pipe 1 and downstream pipe 2. Specifically, after system installation, the closing valve 4 opens, allowing normal gas flow. The operating handle 401 is mechanically locked by the positioning component, the reset torsion spring 402 is in an energy storage state, and the continuous alarm component is on standby. When a gas leak occurs at the pipeline interface, gas enters the cavity formed by the protective shell 3. The leaking gas acts on the positioning component, triggering its mechanical mechanism to automatically release the lock on the operating handle 401. After the restriction is released, the reset torsion spring 402 immediately releases its mechanical energy, driving the operating handle 401 to rotate, thereby closing the closing valve 4 and automatically cutting off the gas supply from the upstream pipeline 1. The action linkage of 1 triggers the continuous alarm component, enabling it to start working and issue a continuous alarm; it does not rely on external power and can still operate reliably even in the event of a power outage, solving the safety blind spot of existing technologies that rely on power; from the occurrence of leakage to the closure of valve 4, the action is physically triggered, with a rapid response, and can automatically cut off the gas source in the early stage of leakage, preventing the accident from escalating and turning passive alarm into active handling; the protective shell 3 is directly installed on the pipeline interface, and its cavity physically encapsulates the leakage point. The system's triggering directly corresponds to the specific point of leakage, realizing the precise location of the leakage point and facilitating subsequent investigation.

[0022] like Figure 6 , Figure 7 and Figure 8 As shown, in a preferred embodiment, based on the above method, the protective shell 3 further includes a first shell 301 and a second shell 302 with mounting holes 303. Sealing gaskets 304 are provided on the mating surfaces of the first shell 301 and the second shell 302 as well as on the inner wall of the mounting holes 303. Ear plates are provided on both the first shell 301 and the second shell 302, and fastening bolts 305 are provided between the two ear plates. Specifically, the fastening bolts 305 are passed through the lugs on the two housings and the nuts are tightened. As the bolts are tightened, the two housings are pulled together, and the sealing gaskets 304 on the mating surface and the inner wall of the mounting hole 303 are simultaneously compressed and deformed, forming a reliable annular seal at the joint and the pipe exit. After tightening, the first housing 301 and the second housing 302 together with the outer wall of the pipe form a sealed space around the pipe joint, which can effectively prevent the gas leaking from the pipe joint from escaping from the protective housing 3 itself. Thus, a reliable sealed monitoring cavity is built around the leak point, providing a structural basis for detecting and containing leaked gas. The protective housing 3 can be disassembled simply by loosening the fastening bolts 305, which is convenient for maintenance and enables reusability and quick disassembly.

[0023] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 10As shown, in a preferred embodiment, based on the above method, the positioning component further includes a fixing groove 5 opened on the first housing 301, a limiting post 501 slidably connected in the fixing groove 5, and a first elastic element 502 disposed between the limiting post 501 and the inner wall of the fixing groove 5. The operating handle 401 is provided with a limiting hole 4011 that cooperates with the limiting post 501. Furthermore, the first housing 301 has a receiving groove 3011 that communicates with the fixing groove 5, and the limiting post 501 has a force-bearing inclined surface on the side away from the first elastic element 502 that moves against the operating handle 401; the force-bearing inclined surface design at the end of the limiting post 501 allows the limiting post 501 to retract through the process of rotating the operating handle 401 when the valve is manually reopened, and the limiting post 501 is automatically popped out and reset under the action of magnetic force after the limiting hole 4011 is aligned, which facilitates system maintenance and reset; Furthermore, the positioning assembly also includes a sealed cavity 6 opened in the first housing 301, a swing rod 601 rotatably connected to the sealed cavity 6 via a pin, and a magnetic block 602 movably disposed at one end of the swing rod 601 and magnetically engaged with the limiting post 501. The magnetic block 602 and the limiting post 501 are magnetically repelled. A rubber diaphragm 604 is provided on the inner wall of the first housing 301, and a second torsion spring for driving the swing rod 601 to reset and rotate is provided on the pin. When a gas leak occurs at the junction of the upstream pipe 1 and the downstream pipe 2, the leaked gas fills the cavity formed by the first shell 301 and the second shell 302. The rubber diaphragm 604 is deformed by force and moves against the end of the swing rod 601 away from the magnetic block 602. Specifically, under normal system conditions, the operating handle 401 is partially located within the receiving groove 3011, and the reset torsion spring 402 is in an energy-storing state, tending to drive the operating handle 401 to rotate and close. However, its rotational movement is blocked by the limiting post 501. At this time, under the magnetic repulsion of the magnetic block 602, the limiting post 501 overcomes the elastic force of the first elastic element 502, and its end inserts into the limiting hole 4011 of the operating handle 401, achieving mechanical locking. When a leak occurs at the pipe interface, gas enters the inner cavity of the protective shell 3, increasing the pressure inside the cavity. This pressure acts on the rubber diaphragm 604, causing it to expand and deform into the sealed cavity 6. The expanded rubber diaphragm 604 pushes one end of the swing rod 601, causing it to rotate around the pin against the torque of the second torsion spring. The other end of the swing rod 601 then drives the magnetic block 602 to move away from the limiting post 501. As the distance between the magnetic block 602 and the limiting post 501 increases, the magnetic repulsion between them increases. The force decays rapidly. When the repulsive force weakens to less than the restoring force of the first elastic element 502, the limiting post 501 is pulled back into the fixing groove 5 by the first elastic element 502, and its end exits from the limiting hole 4011 of the operating handle 401. The restriction of the operating handle 401 is released, and it rotates under the drive of the reset torsion spring 402, causing the closing valve 4 to close. The locking force is provided by the magnetic repulsion between the magnetic block 602 and the limiting post 501. It is a non-contact transmission, which avoids the risk of sealing failure caused by mechanical jamming or corrosion. When unlocking is required, it is only necessary to drive the magnetic block 602 to move away to weaken the magnetic force, and the first elastic element 502 can achieve a fast and reliable unlocking action. The entire triggering process does not require external power. It uses the micro-pressure formed by the leaked gas in the protective shell 3, which is converted into mechanical displacement through the rubber diaphragm 604, driving the swing rod 601 mechanism, and finally changing the magnetic coupling state, thus achieving intrinsically safe active protection.

[0024] like Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, the first housing 301 is further provided with a placement groove 7, a sealing plate 701 is hinged to the placement groove 7, and a plurality of exhaust chambers 702 are arranged sequentially from top to bottom in the placement groove 7. The continuous alarm component includes a gas generating part arranged in each exhaust chamber 702, a gas distribution groove 801 opened in the first housing 301 and connected to each exhaust chamber 702 in a one-to-one correspondence, a vertical groove 802 connecting the plurality of gas distribution grooves 801, and an exhaust groove 8 arranged at the end of the vertical groove 802. A miniature air whistle 803 is arranged in the exhaust groove 8, and a one-way valve is arranged in each gas distribution groove 801. Furthermore, the gas generating unit includes a movable shell 9 slidably disposed in the exhaust chamber 702, a cylindrical porous drug cartridge 901 disposed in the movable shell 9, a water bag 902 disposed on the upper side of the cylindrical porous drug cartridge 901, and a rupture assembly for rupturing the water bag 902. Each exhaust chamber 702 is provided with a rupture assembly on its upper side. Furthermore, the rupture assembly includes a sliding groove 10 formed on the exhaust chamber 702, a sliding plate 1001 slidably connected in the sliding groove 10, a second elastic element 1004 disposed between the sliding plate 1001 and the inner wall of the sliding groove 10, a sliding rod 1002 disposed on the sliding plate 1001, and a puncture needle 1003 disposed at the bottom of the sliding rod 1002. Each sliding groove 10 is provided with a sealing film 1005 at its top. The top of the sealing film 1005 is in contact with the bottom of the operating handle 401 or the movable housing 9, and the bottom of the sealing film 1005 is in contact with the top of the sliding rod 1002. The sealing film 1005 is made of a wear-resistant and corrosion-resistant material. Specifically, all movable shells 9 and their internal medications and water bags 902 are statically stored in their respective exhaust chambers 702. The sealing membranes 1005 at the top of each slide bar 1002 are pressed down by the operating handle 401 or the upper movable shell 9, respectively. The puncture needle 1003 is in a pressed-down state, away from the water bag 902, and the gas passage is empty. When the operating handle 401 rotates away due to the valve being closed, the pressure on the uppermost sealing membrane 1005 is released. The second elastic element 1004 of this layer pushes the slide plate 1001 and slide bar 1002 upward. The slide bar 1002 drives the puncture needle 1003 to puncture the water bag 902 in the same chamber, and the water flow wets the cylindrical porous medication column 9 below. 01. A chemical reaction occurs, producing gas. This gas enters the gas distribution trough 801, is collected by a one-way valve and vertical trough 802, and is ejected from the exhaust trough 8, driving the miniature whistle 803 to sound, initiating the first continuous alarm. In the uppermost exhaust chamber 702, as the reaction proceeds, the reagent is consumed, and the total weight of the movable shell 9 gradually decreases. When its weight decreases to the point where the pressure on the lower sealing membrane 1005 is insufficient to counteract the pressure on the lower second elastic element 1004, the lower sliding rod 1002 moves upward under the elastic force, triggering the rupture of the second water bag 902, initiating the second chemical reaction and alarm. The process of the above-mentioned reaction consumption, weight reduction, and triggering of the lower layer can be transmitted downwards accordingly. This system enables multi-level relay alarms. Users can manually intervene by opening the sealing plate 701 after an alarm is detected, preventing the remaining untriggered layers from operating and avoiding unnecessary energy consumption. Through a multi-level independent gas generator and weight-triggered linkage design, limited chemical energy is managed in segments and sequences. When the previous level's alarm reagent is depleted, the system automatically and seamlessly starts the next level, significantly extending the total alarm duration from tens of minutes per reaction to several hours or even longer. This greatly increases the likelihood of alarms being received by users and provides reliable alarm redundancy. Alarm level switching is entirely automatically controlled by gravity changes, avoiding complex electronic timing or sensing circuits and ensuring reliable alarm performance under any circumstances. The relay function can be executed autonomously and without error in any environment; each gas generating part is independently encapsulated in the exhaust chamber 702, and the solid agent and water bag 902 are physically separated and stored, and the chamber is kept sealed and dry by the sealing film 1005, ensuring the stability and safety of long-term storage. The reaction rate of the cylindrical porous drug column 901 with water is slow and controllable, and the gas production is stable. Users can intuitively understand the alarm progress and intervene in subsequent triggering by manually pressing the movable shell 9, realizing controllable alarm resource management; for indoor gas, multi-level linkage improves alarm persistence, gravity triggering seamless relay reduces single-level short-term failure, and the modular exhaust chamber 702 facilitates batch replacement of drug columns; The cylindrical porous reagent column (901) can be composed of citric acid and sodium bicarbonate. Citric acid is a stable crystal, non-volatile, non-toxic, and has a moderate reaction rate, making it suitable for long-term storage. Sodium bicarbonate is stable, inexpensive, and the reaction products are safe. When water is mixed with the reagent column, a reaction occurs, continuously producing carbon dioxide gas to drive the alarm. Maintaining a loud, miniature gas whistle 803 requires a stable gas flow of approximately 30-50 ml / min (under standard conditions). The gas production efficiency of the reaction system (citric acid + sodium bicarbonate) is approximately 150 ml / g. The total gas required per hour: taking the midpoint 40 ml / min × 60 minutes = 2400 ml. Considering efficiency, the theoretical gas production required is: 2400 ml ÷ 70% ≈ 3429 ml. The required mass of mixed reagent is: 3429 ml ÷ 150 ml / g ≈ 22.9 grams; to maintain the continuous sounding of a miniature whistle for about 1 hour, approximately 23 grams of porous cartridges made from a mixture of citric acid and sodium bicarbonate in a specific ratio are required. The porous cartridges are solid cartridges with low porosity and tortuous channels. Water slowly permeates and diffuses inside the cartridges through capillary action, limiting the instantaneous contact between water and the solid. This transforms the violent, explosive reaction into a diffusion-controlled, gradual reaction, thereby enabling the release of most of the gas within a set time (e.g., 1 hour), rather than releasing it all in the first few minutes.

[0025] like Figure 1 and Figure 2 As shown, as a preferred embodiment, based on the above method, this embodiment proposes an indoor gas pipeline leak active risk alarm device, including the aforementioned indoor gas pipeline leak active risk monitoring and early warning system, and also includes a gas alarm 11 installed on the first housing 301 or the second housing 302. The gas sensor contact of the gas alarm 11 is located in the cavity enclosed by the first housing 301 and the second housing 302. A pressure relief valve 12 is also installed on the first housing 301 or the second housing 302. Specifically, when a gas leak occurs at the pipe interface, the gas will first accumulate in the cavity formed by the protective shell 3. The sensor contact of the gas alarm 11 directly contacts the leaking gas. When the concentration reaches its preset alarm threshold, the gas alarm 11 immediately activates its audible and visual alarm function and can transmit the alarm signal to a remote monitoring platform or user terminal via wired or wireless means, realizing an early, power-dependent active alarm. During the process of the gas leak causing the pressure in the cavity to continue to rise, when the pressure exceeds the preset opening pressure of the pressure relief valve 12, the valve core of the pressure relief valve 12 automatically opens, directionally and controllably discharging the overpressurized gas mixture to an external safe area, thereby ensuring that the pressure in the cavity of the protective shell 3 is always maintained within a safe range. By adding the gas alarm 11, an active, electrical signal-based early warning layer is added before the original purely mechanically triggered passive alarm.

[0026] When designing indoor gas leak protection devices, those skilled in the art typically use an electric sensor combined with a solenoid valve shut-off or a single chemical alarm. However, these solutions struggle to simultaneously address issues such as power outage failure, insufficient alarm duration, and precise leak location. Even when combined with existing knowledge of mechanical transmission and chemical reactions, it is difficult to achieve rapid shut-off and long-lasting relay alarm in a power-free environment through a specific combination of pressure transmission via a rubber diaphragm 604, magnetic non-contact unlocking, automatic valve closure via a torsion spring, and gravity reduction by the movable shell 9 to trigger multi-stage chemical gas generation in stages. This invention not only ensures reliable protection in power outage scenarios but also significantly extends alarm duration through multi-stage relay, while the protective shell 3 achieves precise leak location and diffusion control.

[0027] This invention also discloses an indoor gas pipeline leak alarm method, which, by applying the aforementioned indoor gas pipeline leak active risk alarm device, includes the following steps: S1: The protective shell 3 is tightly enclosed at the joint of the two pipes by fastening bolts 305, and the sealing gasket 304 ensures that the cavity is sealed. At this time, the closed valve 4 on the upstream pipeline 1 is in the open state, its operating handle 401 is locked by the positioning component, and the movable shell 9, water bag 902, and cylindrical porous drug column 901 in all exhaust chambers 702 of the continuous alarm component are in a static, dry, and separated stable storage state. The puncture needle 1003 is pressed down by the operating handle 401 or the upper movable shell 9 and moves away from the water bag 902. The gas alarm 11 is powered on and continuously monitors the gas composition in the protective shell 3. S2: Gas leaks from the pipe interface and fills the cavity formed by the protective shell 3. The gas alarm 11 quickly detects that the gas concentration exceeds the standard and immediately sends a remote electrical signal alarm to the smart home host and the user's mobile phone. S3: The leaking gas causes the pressure inside the protective shell 3 to increase. The pressure acts on the rubber diaphragm 604, causing it to deform into the sealed cavity 6, pushing one end of the swing rod 601. The swing rod 601 overcomes the torque of the second torsion spring and rotates around the pin. The other end of the swing rod 601 drives the magnetic block 602 to move away from the fixed groove 5. The magnetic repulsion between the magnetic block 602 and the limiting post 501 weakens rapidly. When the repulsion decreases to less than the pulling force of the first elastic element 502, the limiting post 501 is pulled back into the fixed groove 5, thus disengaging from the limiting hole 4011 of the operating handle 401. S4: The restriction on the operating handle 401 is lifted, and it rotates at high speed under the torque stored in the reset torsion spring 402, which drives the valve core of the closing valve 4 to rotate, instantly cutting off the gas supply to the upstream pipeline 1, and the source of leakage is automatically cut off within a few seconds. S5: While the operating handle 401 is rotating to reset, its body no longer abuts against the sealing film 1005 of the uppermost sliding groove 10. The slide rod 1002, which was originally pressed by the operating handle 401, loses pressure and bounces upward under the action of the second elastic element 1004. The slide rod 1002 drives the bottom piercing needle 1003 to pierce the water bag 902 in the uppermost exhaust chamber 702. The water flows into the lower cylindrical porous medicine column 901. The water and medicine react chemically to continuously produce a large amount of carbon dioxide gas. The gas flows through the gas distribution groove 801 and the vertical groove 802 to the exhaust groove 8. When it flows through the miniature whistle 803, it produces a continuous and sharp alarm sound. S6: The cylindrical porous drug column 901 in the uppermost exhaust chamber 702 is gradually consumed as the reaction proceeds, and its total weight with the residual liquid is continuously reduced. When the weight is reduced to a certain extent, the pressure of the movable shell 9 on the sealing film 1005 and the slide bar 1002 of the second sliding groove 10 is significantly reduced. The slide bar 1002 of the second layer then bounces up under the action of its second elastic element 1004, and the puncture needle 1003 punctures the water bag 902 of the second layer, starting the chemical reaction and alarm in the second chamber. This process is passed down sequentially, achieving relay alarms for multiple exhaust chambers 702, with a total alarm time of several hours. After the user arrives, they open the sealing plate 701, manually press down the movable shell 9 that has not yet been triggered to prevent subsequent waste of reagents, and perform system reset and maintenance. S7: After the maintenance personnel repair the pipeline leak, they manually turn the operating handle 401 to reopen the closed valve 4. During the turning process, the operating handle 401 presses the inclined surface of the limiting post 501, causing it to retract. At the same time, the swing rod 601 returns to its original position under the action of the second torsion spring. The magnetic block 602 approaches the limiting post 501 again, pushes it out magnetically, and locks it into the limiting hole 4011, thus relocking the valve. Then, the consumed gas generating part is replaced, the sealing plate 701 is closed, and the system returns to standby mode.

[0028] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. Indoor gas pipeline leakage active risk monitoring and early warning system, comprising a monitoring and early warning mechanism arranged between an upstream pipeline (1) and a downstream pipeline (2), characterized in that, The monitoring and early warning agencies include: A protective shell (3) is fitted on the outside of the connection point between the upstream pipe (1) and the downstream pipe (2); A closing valve (4) is provided on the upstream pipe (1), and a reset torsion spring (402) is provided between the operating handle (401) of the closing valve (4) and the upstream pipe (1). A positioning component, which is disposed within the protective housing (3), is used to confine the operating handle (401) within the protective housing (3); And a continuous alarm component, which is disposed within the protective housing (3) and is used to continuously issue an alarm after the closed valve (4) closes the upstream pipeline (1); When a gas leak occurs at the junction of the upstream pipe (1) and the downstream pipe (2), the positioning component automatically releases the restriction on the operating handle (401), causing the closing valve (4) to automatically disconnect the connection between the upstream pipe (1) and the downstream pipe (2).

2. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 1, characterized in that, The protective shell (3) includes a first shell (301) and a second shell (302) with a mounting hole (303). The mating surfaces of the first shell (301) and the second shell (302) and the inner wall of the mounting hole (303) are provided with sealing gaskets (304). The first shell (301) and the second shell (302) are provided with ear plates, and fastening bolts (305) are provided between the two ear plates.

3. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 2, characterized in that, The positioning component includes a fixing groove (5) opened on the first housing (301), a limiting post (501) slidably connected in the fixing groove (5), and a first elastic element (502) disposed between the limiting post (501) and the inner wall of the fixing groove (5). The operating handle (401) is provided with a limiting hole (4011) that cooperates with the limiting post (501).

4. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 3, characterized in that, The first housing (301) has a receiving groove (3011) that communicates with the fixing groove (5), and the limiting post (501) has a force-bearing inclined surface that moves against the operating handle (401) on the side away from the first elastic element (502).

5. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 4, characterized in that, The positioning assembly further includes a sealed cavity (6) opened in the first housing (301), a swing rod (601) rotatably connected to the sealed cavity (6) by a pin, and a magnetic block (602) movably disposed at one end of the swing rod (601) and magnetically engaged with the limiting post (501). The magnetic block (602) and the limiting post (501) are magnetically repelled. A rubber diaphragm (604) is provided on the inner wall of the first housing (301), and a second torsion spring for driving the swing rod (601) to reset and rotate is provided on the pin. When a gas leak occurs at the junction of the upstream pipe (1) and the downstream pipe (2), the leaked gas fills the cavity formed by the first shell (301) and the second shell (302). The rubber diaphragm (604) is deformed by force and moves against the end of the swing rod (601) away from the magnetic block (602).

6. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 5, characterized in that, The first housing (301) has a placement groove (7) and a sealing plate (701) is hinged to the placement groove (7). A plurality of exhaust chambers (702) are arranged in the placement groove (7) from top to bottom. The continuous alarm component includes a gas generating part arranged in each exhaust chamber (702), a gas distribution groove (801) opened in the first housing (301) and connected to each exhaust chamber (702) in a one-to-one correspondence, a vertical groove (802) connecting the plurality of gas distribution grooves (801), and an exhaust groove (8) arranged at the end of the vertical groove (802). A miniature air whistle (803) is arranged in the exhaust groove (8), and a one-way valve is arranged in each of the gas distribution grooves (801).

7. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 6, characterized in that, The gas generating unit includes a movable shell (9) slidably disposed in an exhaust chamber (702), a cylindrical porous drug cartridge (901) disposed in the movable shell (9), a water bag (902) disposed on the upper side of the cylindrical porous drug cartridge (901), and a rupture assembly for rupturing the water bag (902). Each exhaust chamber (702) is provided with a rupture assembly on its upper side.

8. The indoor gas pipeline leakage active risk monitoring and early warning system according to claim 7, characterized in that, The rupture assembly includes a sliding groove (10) formed in the exhaust chamber (702), a sliding plate (1001) slidably connected in the sliding groove (10), a second elastic element (1004) disposed between the sliding plate (1001) and the inner wall of the sliding groove (10), a sliding rod (1002) disposed on the sliding plate (1001), and a puncture needle (1003) disposed at the bottom of the sliding rod (1002). Each sliding groove (10) is provided with a sealing film (1005) at its top. The top of the sealing film (1005) moves against the bottom of the operating handle (401) or the movable shell (9), and the bottom of the sealing film (1005) moves against the top of the sliding rod (1002).

9. An active risk alarm device for indoor gas pipeline leaks, comprising the active risk monitoring and early warning system for indoor gas pipeline leaks as described in claim 8, characterized in that, It also includes a gas alarm (11) installed on the first housing (301) or the second housing (302), the gas sensor contact of the gas alarm (11) being located in the cavity enclosed by the first housing (301) and the second housing (302), and a pressure relief valve (12) is also provided on the first housing (301) or the second housing (302).

10. An indoor gas pipeline leak alarm method, characterized by applying the indoor gas pipeline leak active risk alarm device as described in claim 9, wherein... Includes the following steps: S1: The protective shell (3) is tightly enclosed at the joint of the two pipes by fastening bolts (305), and the sealing gasket (304) ensures that the cavity is sealed; At this time, the closed valve (4) on the upstream pipeline (1) is in the open state, its operating handle (401) is locked by the positioning component, the movable shell (9) and water bag (902) and cylindrical porous drug column (901) in all exhaust chambers (702) of the continuous alarm component are in a static, dry and separated stable storage state, the puncture needle (1003) is pressed down by the operating handle (401) or the upper movable shell (9) and moves away from the water bag (902), the gas alarm (11) is powered on and continuously monitors the gas composition in the protective shell (3); S2: Gas leaks from the pipe interface and fills the cavity formed by the protective shell (3). The gas alarm (11) quickly detects that the gas concentration exceeds the standard and immediately sends a remote electrical signal alarm to the smart home host and the user's mobile phone. S3: The leaking gas causes the pressure inside the protective shell (3) to increase. The pressure acts on the rubber diaphragm (604), causing it to deform into the sealed cavity (6), pushing one end of the swing rod (601). The swing rod (601) overcomes the torque of the second torsion spring and rotates around the pin. The other end of the swing rod (601) drives the magnetic block (602) to move away from the fixed groove (5). The magnetic repulsion between the magnetic block (602) and the limiting post (501) weakens rapidly. When the repulsion decreases to less than the pulling force of the first elastic element (502), the limiting post (501) is pulled back into the fixed groove (5) and thus disengages from the limiting hole (4011) of the operating handle (401). S4: The restriction of the operating handle (401) is released, and it rotates at high speed under the torque stored in the reset torsion spring (402), which drives the valve core of the closed valve (4) to rotate, instantly cutting off the gas supply of the upstream pipeline (1), and the source of leakage is automatically cut off within a few seconds. S5: While the operating handle (401) is rotating to reset, its body no longer abuts against the sealing film (1005) of the uppermost sliding groove (10). The slide bar (1002) that was originally pressed by the operating handle (401) loses pressure and bounces upward under the action of the second elastic element (1004). The slide bar (1002) drives the bottom puncture needle (1003) to pierce upward rapidly, piercing the water bag (902) in the uppermost exhaust chamber (702). The water flows into the cylindrical porous medicine column (901) below. The water and the medicine react chemically and continuously produce a large amount of carbon dioxide gas. The gas flows through the gas distribution groove (801) and the vertical groove (802) to the exhaust groove (8). When it flows through the miniature whistle (803), it produces a continuous and sharp alarm sound. S6: The cylindrical porous drug column (901) in the uppermost exhaust chamber (702) is gradually consumed as the reaction proceeds, and its total weight with the residual liquid is continuously reduced. When the weight is reduced to a certain extent, the pressure of the movable shell (9) on the sealing film (1005) and slide bar (1002) of the second sliding groove (10) is significantly reduced. The slide bar (1002) of the second layer then bounces up under the action of its second elastic element (1004), and the puncture needle (1003) punctures the water bag (902) of the second layer, starting the chemical reaction and alarm of the second chamber; This process is passed down sequentially, realizing relay alarms for multiple exhaust chambers (702). The total alarm time is up to several hours. After the user arrives, he opens the sealing plate (701), manually presses down the movable shell (9) that has not yet been triggered, prevents subsequent waste of reagents, and performs system reset and maintenance. S7: After the maintenance personnel repair the pipeline leak, they manually turn the operating handle (401) to reopen the closed valve (4). During the turning process, the operating handle (401) presses the inclined surface of the limit post (501) to retract it. At the same time, the swing rod (601) returns to its original position under the action of the second torsion spring. The magnetic block (602) approaches the limit post (501) again, pushes it out magnetically and locks it into the limit hole (4011), and relocks the valve. Then, the consumed gas generator is replaced, the sealing plate (701) is closed, and the system returns to standby state.

Images