Distribution box capable of automatically extinguishing fire

Abstract

The invention discloses a distribution box capable of automatically extinguishing fire, which relates to the technical field of safety protection of electrical equipment and comprises a box body, a pressure accumulation and secondary slow release injection integrated assembly and a primary trigger and double-valve linkage injection integrated assembly, the pressure accumulation and second-stage slow release injection integrated assembly and the first-stage triggering and double-valve linkage injection integrated assembly are arranged in the box body; the pressure storage and secondary slow-release injection integrated assembly comprises a flexible pressure storage bag, a slow-release control valve body and a group of capillary networks, and the flexible pressure storage bag is filled with a high-pressure fire extinguishing agent; through systematic cooperation of the pressure accumulation and secondary slow release injection integrated assembly and the primary triggering and double-valve linkage injection integrated assembly, organic unification of rapid fire response, precise coverage, continuous fire control and electrical compatibility of the distribution box is achieved, and the core problems that a traditional device is lagged in response, uneven in coverage, high in reburning risk, poor in electrical adaptation and complex in operation and maintenance are solved in a targeted mode; and power distribution safety protection requirements of various specifications of power distribution boxes and multi-scene power distribution are met.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment safety protection technology, specifically to a distribution box capable of automatic fire extinguishing. Background Technology

[0002] Distribution boxes are core equipment for power transmission, distribution, and control in industrial production and civil buildings, and are widely used in critical scenarios such as intelligent manufacturing, high-rise buildings, data centers, and rail transit. Their internal components, such as circuit breakers, contactors, and terminals, operate under high loads for extended periods, making them susceptible to localized overheating and fires due to short circuits, component overloads, and poor contact. If not controlled in time, the fire can quickly spread to the entire power distribution system, causing equipment damage, power outages, and even major safety accidents. Therefore, developing efficient, precise, and reliable automatic fire suppression technology for distribution boxes has become an urgent industry need.

[0003] The core contradiction of automatic fire-extinguishing distribution boxes lies in the fundamental conflict between the rigid demands of various sectors for rapid response, precise coverage, continuous fire control, and electrical compatibility in power distribution safety and the traditional fire extinguishing devices' slow response, uneven coverage, weak fire control capabilities, and insufficient electrical adaptability. While fire detection, triggering, and extinguishing should form a closed-loop protection system, traditional designs have long relied on single triggering methods, discrete fire extinguishing units, and coarse-grained agent spraying. This makes them ill-suited to the complex scenarios within distribution boxes, characterized by dense components, dispersed heat sources, and variable operating environments (e.g., vibration, humidity, electromagnetic interference, and limited space), as well as the flexible adaptability and deep protection requirements of different distribution box sizes. This results in two major systemic defects in existing technologies: firstly, insufficient rapid response and precise coverage, leading to the spread of fire. In addition to secondary damage, traditional fixed nozzles suffer from multiple problems. Due to the single and uneven distribution of the agent spray path, local fire sources are not extinguished in time, causing the fire to spread. Moreover, most of them are designed with a single trigger point, which is difficult to fully cover multiple heat points. Some systems that rely on electronic detection triggering completely fail under power failure conditions and require manual reset to restore the protective function. However, in unattended scenarios, they are prone to reignition risks. Secondly, there are problems with continuous fire control and electrical compatibility. Traditional fire extinguishing devices are mostly disposable agents that cannot be repressurized after depletion, making them unable to deal with reignition. In addition, some fire extinguishing media may contain residual conductive substances, or the mechanical linkage structure and electrical components may not be sufficiently spaced, which can easily cause secondary short circuit accidents. Traditional high-pressure steel cylinder fire extinguishing units are large and heavy, making it difficult to adapt to the installation space limitations of small distribution boxes.

[0004] Therefore, we propose an automatic fire-extinguishing distribution box to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic fire extinguishing distribution box that achieves a unified approach to rapid fire response, precise coverage, continuous fire control, and electrical compatibility. It specifically addresses the core pain points of traditional devices, such as delayed response, uneven coverage, high risk of reignition, poor electrical compatibility, and complex operation and maintenance. It is compatible with various specifications of distribution boxes and meets the power distribution safety protection needs of multiple scenarios.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic fire extinguishing distribution box, comprising a box body, a pressure storage and secondary slow-release injection integrated component, and a primary trigger and dual-valve linkage injection integrated component, wherein the pressure storage and secondary slow-release injection integrated component and the primary trigger and dual-valve linkage injection integrated component are installed inside the box body; The integrated pressure storage and secondary slow-release injection component includes a flexible pressure storage bladder, a slow-release control valve body, and a set of capillary networks. The flexible pressure storage bladder is filled with high-pressure extinguishing agent. The inner surface of the slow-release control valve body is provided with micro-throttling orifices, which are used to precisely control the agent flow rate of the injection branch. The outer surface of the set of capillary networks is provided with micro-orifice injection heads, which are used to achieve agent dispersion and delivery and adapt to narrow gaps inside the box. The first-level trigger and dual-valve linkage injection integrated component includes a connecting rod, a first rotating rod, a silicone sleeve, a lever, and a temperature-sensitive glass ball. The connecting rod and the first rotating rod are used to amplify the expansion force of the silicone sleeve. The silicone sleeve is used to convert linear displacement into axial and radial expansion forces. The lever is used to amplify the expansion force of the silicone sleeve. The temperature-sensitive glass ball is used to rupture instantaneously when the temperature reaches a threshold.

[0007] Preferably, a safety door is connected to one side of the outer wall of the enclosure, and a mounting plate is fixedly connected to one side of the inner wall of the enclosure. A circuit breaker is provided on one side of the outer wall of the mounting plate.

[0008] Preferably, the pressure storage and secondary slow-release injection integrated assembly further includes two fixed frames, the tops of the two fixed frames are bolted to the top of the inner wall of the housing, and the inner surfaces of the two fixed frames are fitted and connected to the outer surface of the flexible pressure storage bladder.

[0009] Preferably, the bottom of the flexible pressure reservoir is provided with a drug outlet and an inflation port. The bottom of the drug outlet is connected to a delivery pipe. One end of the outer wall of the delivery pipe is connected to one side of the outer wall of the slow-release control valve body. The inner surface of the slow-release control valve body is connected to a slow-release valve core, and a micro-throttling orifice passes through the slow-release valve core. The top of the slow-release control valve body is connected to a main pipe, and the main pipe is connected to a set of capillary networks.

[0010] Preferably, the first-level trigger and dual-valve linkage injection integrated assembly further includes a branch pipe, a support frame, and two annular frames. The bottom of the branch pipe is connected to a quick-release valve body, and a release valve core is slidably connected between the inner surfaces of the quick-release valve body. The top of the release valve core and the top of the inner surface of the quick-release valve body are conical mating surfaces.

[0011] Preferably, a first spring is sleeved on the outer surface of the release valve core, one end of the outer wall of the first spring is fixedly connected to the bottom boss of the inner surface of the quick release valve body, the bottom of the quick release valve body is connected to a universal joint connector, and the bottom of the universal joint connector is connected to a diffusion-type injection nozzle.

[0012] Preferably, the outer surface of the release valve core and the inner surface of the connecting rod are sleeved and connected, the outer wall of the connecting rod is penetrated by a first rotating rod, a groove is opened on one side of the outer wall of the quick release valve body, the inner walls of the groove are movably connected to the outer walls of the first rotating rod, a housing is provided on one side of the outer wall of the quick release valve body, a push rod is installed between the inner surfaces of the housing, and the bottom of the push rod is embedded and connected to the top of the temperature sensing glass ball.

[0013] Preferably, the outer surface of the push rod is integrally formed with a piston, the inner surface of the housing is connected to the outer surface of the sealing diaphragm, and the inner surface of the sealing diaphragm and the outer surface of the push rod are slidably engaged, a top cover is connected between the inner surfaces of the housing, the inner surface of the top cover is connected to the outer surface of the silicone sleeve, a second spring is fixedly connected to the opposite side of the top cover and the sealing diaphragm, and one end of the outer wall of the connecting rod and the long side end of the lever are both located on the top of the silicone sleeve.

[0014] Preferably, one side of the outer wall of the support frame is bolted to one side of the outer wall of the mounting plate, and two connecting plates are fixedly connected to the top of the support frame. A solid rod is connected between the outer walls of the two connecting plates, and the outer surface of the solid rod is movably connected to the inner surface of the lever.

[0015] Preferably, one side of the outer wall of the two annular frames is bolted to one side of the outer wall of the mounting plate. A miniature high-pressure gas cylinder is fixedly connected between the inner surfaces of the two annular frames. The top of the miniature high-pressure gas cylinder is connected to a firing valve body. The bottom conical surface of the inner surface of the firing valve body is fitted with a firing valve core. A third spring is sleeved on the outer surface of the firing valve core. The top of the third spring is fixedly connected to the top boss on the inner surface of the firing valve body. A pressure rod is fixedly connected to one side of the outer wall of the firing valve core. A second rotating rod passes through the outer wall of the pressure rod. A hole is opened on one side of the outer wall of the firing valve body. The two sides of the inner wall of the hole and the two ends of the outer wall of the second rotating rod are movably connected. The top of the firing valve body is connected to a gas supply pipe, and the gas supply end of the gas supply pipe is connected to the gas inlet end of the filling interface.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the integrated component of pressure storage and secondary slow-release injection, along with the integrated component of primary triggering and dual-valve linkage injection, achieves a unified system of rapid response, precise coverage, continuous fire control, and electrical compatibility in distribution box fires. It specifically addresses the core pain points of traditional devices, such as delayed response, uneven coverage, high risk of reignition, poor electrical compatibility, and complex operation and maintenance. It is suitable for various specifications of distribution boxes and multiple scenarios requiring power distribution safety protection. Firstly, the integrated component of pressure storage and secondary slow-release injection adopts an integrated design of flexible pressure storage bladder, main pipeline diversion, and secondary slow-release injection. A flexible pressure storage bladder reinforced with fluororubber and aramid fibers replaces the traditional high-pressure cylinder, achieving a lightweight layout and stable pressure supply. Precise diversion of the main pipeline and flow regulation of the secondary branches through slow-release control valves, followed by delivery via capillary network to micro-orifice injection heads, atomized and sprayed to cover the gaps and back of the distribution box. The system eliminates blind spots and provides comprehensive slow-release protection. Integrated brackets and sealing components ensure leak-free operation; components can be pre-installed and maintained independently without disassembling the entire system, significantly reducing maintenance costs. Secondly, the integrated primary trigger and dual-valve linkage injection component utilizes a coupled design of a temperature-sensing glass bulb, a dual-valve linkage mechanism, and lever transmission. The temperature-sensing glass bulb directly adheres to the equipment, and rapid response is achieved through mechanical transmission via a piston, push rod, and sealing diaphragm. This purely mechanical structure completely solves the problem of failure under power outage conditions. The silicone sleeve converts displacement into expansion force, synchronously driving two links: one path presses down the rapid release valve via the first connecting rod and first rotating rod, forming a high-speed conical jet from the diffusion nozzle directly targeting the core ignition source; the other path opens the miniature high-pressure gas cylinder via the linkage lever, second rotating rod, and pressure rod, continuously replenishing the pressure in the flexible storage bladder, achieving one-time triggering and continuous injection, preventing reignition. Attached Figure Description

[0017] Figure 1 This is a perspective view of the main structure of a power distribution box with automatic fire extinguishing capability according to the present invention. Figure 2 This is a three-dimensional cross-sectional view of a power distribution box with automatic fire extinguishing capability according to the present invention. Figure 3 This is a schematic diagram of the installation position structure of the integrated assembly of pressure storage and secondary slow-release injection and the integrated assembly of primary triggering and dual-valve linkage injection in the power distribution box of the present invention for automatic fire extinguishing. Figure 4 This is a schematic diagram of the installation location of the integrated assembly of pressure storage and secondary slow-release injection in an automatic fire extinguishing distribution box according to the present invention. Figure 5 This is a schematic diagram showing the installation positions of the slow-release control valve body, the slow-release valve core, and the miniature throttling orifice in an automatic fire-extinguishing distribution box according to the present invention. Figure 6This is a schematic diagram of the installation position of the integrated component for primary triggering and dual-valve linkage spraying in an automatic fire extinguishing distribution box according to the present invention. Figure 7 This is a schematic diagram showing the installation positions of the support frame, connecting plate, and lever in an automatic fire-extinguishing distribution box according to the present invention. Figure 8 This is a schematic diagram showing the installation positions of the push rod, piston, and temperature-sensing glass bulb in an automatic fire-extinguishing distribution box according to the present invention. Figure 9 This is a schematic diagram showing the installation positions of the release valve core, first spring, connecting rod, and first rotating rod in an automatic fire extinguishing distribution box according to the present invention. Figure 10 This is a schematic diagram showing the installation positions of the support frame, connecting plate, and lever in an automatic fire-extinguishing distribution box according to the present invention. Figure 11 for Figure 10 Enlarged 3D view of the structure at point A in the middle.

[0018] In the diagram: 100, housing; 200, safety door; 300, mounting plate; 400, circuit breaker; 500, integrated assembly for pressure accumulator and secondary slow-release injection; 501, fixed frame; 502, flexible pressure accumulator; 503, agent outlet; 504, inflation port; 505, delivery pipeline; 506, slow-release control valve body; 507, slow-release valve core; 508, miniature throttling orifice; 509, main pipeline; 510, capillary network; 600, integrated assembly for primary triggering and dual-valve linkage injection; 601, branch pipeline; 602, quick-release valve body; 603, release valve core; 604, first spring; 605. Connecting rod; 606. First rotating rod; 607. Universal joint; 608. Diffusion-type injection nozzle; 609. Housing; 610. Push rod; 611. Piston; 612. Sealing diaphragm; 613. Second spring; 614. Top cover; 615. Silicone sleeve; 616. Support frame; 617. Connecting plate; 618. Lever; 619. Ring frame; 620. Miniature high-pressure gas cylinder; 621. Activating valve body; 622. Activating valve core; 623. Third spring; 624. Pressure rod; 625. Second rotating rod; 626. Gas pipeline; 627. Temperature-sensing glass bulb; 628. Groove. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-2 As shown, this embodiment discloses an automatic fire extinguishing distribution box, including a box body 100, a pressure storage and secondary slow-release spray integrated component 500, and a primary trigger and dual-valve linkage spray integrated component 600. The pressure storage and secondary slow-release spray integrated component 500 and the primary trigger and dual-valve linkage spray integrated component 600 are installed inside the box body 100. like Figure 3 As shown, the pressure storage and secondary slow-release injection integrated component 500 includes a flexible pressure storage bladder 502, a slow-release control valve body 506, and a set of capillary networks 510. The flexible pressure storage bladder 502 is filled with high-pressure fire extinguishing agent. The inner surface of the slow-release control valve body 506 is provided with micro-throttling orifices 508, which are used to precisely control the agent flow rate of the injection branch. The outer surface of the set of capillary networks 510 is provided with micro-orifice injection heads, and the capillary networks 510 are used to realize the dispersion and delivery of the agent and adapt to the narrow gaps inside the housing 100. like Figures 9-11 As shown, the first-level trigger and dual-valve linkage injection integrated assembly 600 includes a connecting rod 605, a first rotating rod 606, a silicone sleeve 615, a lever 618, and a temperature-sensing glass ball 627. The connecting rod 605 and the first rotating rod 606 are used to amplify the expansion force of the silicone sleeve 615. The silicone sleeve 615 is used to convert linear displacement into axial and radial expansion force. The lever 618 is used to amplify the expansion force of the silicone sleeve 615. The temperature-sensing glass ball 627 is used to rupture instantaneously when the temperature reaches the threshold.

[0021] This embodiment primarily addresses the core contradiction of automatically extinguishing electrical distribution boxes: the rigid demands across various sectors for rapid response, precise coverage, continuous fire control, and electrical compatibility in power distribution safety, which fundamentally conflict with the slow response, uneven coverage, weak fire control capabilities, and insufficient electrical compatibility of traditional fire extinguishing devices. The detection, triggering, and extinguishing of fire should form a closed-loop protection system, but traditional designs have long relied on single triggering methods, discrete extinguishing units, and coarse-grained agent spraying. This makes it difficult to adapt to the complex scenarios within electrical distribution boxes, such as dense components, dispersed heat sources, and variable operating environments (vibration, humidity, electromagnetic interference, and limited space), as well as the flexible adaptation and deep protection requirements of different sizes of distribution boxes. This results in two major systemic defects in existing technologies: firstly, insufficient rapid response and precise coverage, leading to… The spread of fire and secondary damage are significant issues. Traditional fixed nozzles, due to their single spray path and uneven distribution, allow localized fires to spread unchecked. Furthermore, their single-trigger design makes it difficult to comprehensively cover multiple heat sources. Some systems relying on electronic detection fail completely during power outages and require manual reset to restore their protective function, which poses a risk of reignition in unattended scenarios. Secondly, there are issues with continuous fire control and electrical compatibility. Traditional fire extinguishing devices often use single-use agents, with no pressure replenishment after depletion, making them unable to handle reignition. Additionally, some extinguishing media may contain residual conductive substances, or the mechanical linkage structure may have insufficient spacing between electrical components, easily leading to secondary short circuits. Traditional high-pressure cylinder fire extinguishing units are large and heavy, making them unsuitable for installation in small electrical distribution boxes.

[0022] This embodiment addresses the problems of existing technologies by systematically coordinating the pressure storage and secondary slow-release injection integrated component 500 with the primary trigger and dual-valve linkage injection integrated component 600. This achieves a unified system of rapid response, precise coverage, continuous fire control, and electrical compatibility in distribution box fires. It specifically addresses the core pain points of traditional devices, such as delayed response, uneven coverage, high risk of reignition, poor electrical compatibility, and complex maintenance. It is adaptable to various distribution box specifications and multiple scenarios requiring power distribution safety protection. Firstly, the pressure storage and secondary slow-release injection integrated component 500 adopts an integrated design of a flexible pressure storage bladder 502, a main pipeline 509 for diversion, and secondary slow-release injection. The flexible pressure storage bladder 502, reinforced with fluororubber and aramid fibers, replaces the traditional high-pressure cylinder, achieving a lightweight layout and stable pressure supply. The precise diversion of the main pipeline 509 and the flow regulation of the secondary branches via the slow-release control valve body 506, followed by delivery to the micro-orifice injection head via the capillary network 510, atomized and sprayed to cover the gaps in the distribution box. The back and other blind spots form a comprehensive slow-release protection; the integrated bracket and sealing components ensure no leakage, and the components can be pre-installed and maintained independently without disassembling the whole system, significantly reducing operation and maintenance costs; secondly, the first-level trigger and dual-valve linkage injection integrated component 600, through the coupling design of the temperature-sensing glass ball 627, the dual-valve linkage mechanism, and the lever 618 transmission, the temperature-sensing glass ball 627 is directly attached to the equipment, and through the mechanical transmission of the piston 611, push rod 610, and sealing diaphragm 612, a rapid response is achieved. The pure mechanical structure completely solves the problem of failure under power failure conditions; the silicone sleeve converts displacement into expansion force, synchronously driving the dual links: the first path presses down the rapid release valve through the connecting rod 605 and the first rotating rod 606, and the diffusion nozzle forms a cone-shaped high-speed jet that directly hits the core fire source; the other path opens the miniature high-pressure gas cylinder 620 through the linkage lever 618, the second rotating rod 625, and the pressure rod 624, continuously replenishing the pressure of the flexible pressure storage bladder 502, achieving one-time trigger and continuous injection, and preventing reignition.

[0023] according to Figure 1 As shown, a safety door 200 is connected to one side of the outer wall of the enclosure 100, and an installation plate 300 is fixedly connected to one side of the inner wall of the enclosure 100. A circuit breaker 400 is provided on one side of the outer wall of the installation plate 300.

[0024] In this embodiment of the invention, the safety door 200 not only provides basic protection against dust, theft, and accidental contact with electrical components inside the box, but also creates a relatively enclosed space inside the box when a fire is triggered for extinguishing. This prevents the extinguishing agent from dispersing due to airflow leakage from the box, ensuring that the agent is concentrated on the fire source area, thereby improving extinguishing efficiency. The mounting plate 300 serves as a dual carrier for fixing electrical components and installing the integrated assembly 500 for pressure storage and secondary slow-release injection, as well as the integrated assembly 600 for primary triggering and dual-valve linkage injection. It provides a stable installation reference for the circuit breaker 400 and also allows for... The support frame 616, ring frame 619, and other components of the primary triggering component are bolted together to ensure that the positions of the pressure storage and secondary slow-release injection integrated component 500, the primary triggering and dual-valve linkage injection integrated component 600, and the circuit breaker 400 and other heating elements are accurately aligned, avoiding untimely triggering or misaligned injection due to installation misalignment. As the core high-load component in the box, the heat point of the circuit breaker 400 during operation is the key monitoring position of the temperature-sensing glass ball 627 of the primary triggering component. This close arrangement of components and triggering elements can minimize the temperature transmission path and lay the foundation for rapid triggering.

[0025] according to Figure 4 As shown, the pressure storage and secondary slow-release injection integrated assembly 500 also includes two fixed frames 501. The tops of the two fixed frames 501 are bolted to the top of the inner wall of the housing 100, and the inner surfaces of the two fixed frames 501 are bonded to the outer surface of the flexible pressure storage bladder 502.

[0026] In this embodiment of the invention, the core function of the fixing frame 501 is to provide dual protection of limiting and supporting the flexible pressure bladder 502. Firstly, after the flexible pressure bladder 502 is filled with high-pressure agent, it will tend to expand. The fixing frame 501, through its inner surface contact constraint, can limit its expansion range, thereby preventing the flexible pressure bladder 502 from squeezing other electrical components inside the box due to excessive expansion. Simultaneously, it can also prevent the flexible pressure bladder 502 from shifting when the box 100 vibrates slightly, ensuring the sealing of the connection between the agent outlet 503 and the delivery pipe 505, and preventing agent leakage. Furthermore, the bolted connection design between the fixing frame 501 and the box 100 makes later maintenance more convenient. When it is necessary to replace or replenish the agent in the flexible pressure bladder 502, only the top bolts of the fixing frame 501 need to be removed to take out the flexible pressure bladder 502, without disassembling the entire internal structure of the box 100, thus reducing the difficulty of operation and maintenance.

[0027] according to Figures 4-5As shown, the bottom of the flexible pressure reservoir 502 is provided with a drug outlet 503 and an inflation port 504. The bottom of the drug outlet 503 is connected to a delivery pipe 505. One end of the outer wall of the delivery pipe 505 is connected to one side of the outer wall of the slow-release control valve body 506. The inner surface of the slow-release control valve body 506 is connected to the slow-release valve core 507, and a micro throttling orifice 508 passes through the slow-release valve core 507. The top of the slow-release control valve body 506 is connected to a main pipe 509, and the main pipe 509 is connected to a set of capillary networks 510.

[0028] In this embodiment of the invention, firstly, the direct connection between the agent outlet 503 and the delivery pipeline 505 reduces the number of joints, structurally reducing the risk of agent leakage; secondly, the inflation port 504 provides a channel for repeated gas replenishment of the flexible pressure storage bladder 502. Unlike traditional disposable cylinders, high-pressure gas can be replenished through the inflation port 504 to restore the pressure supply capacity of the flexible pressure storage bladder 502, eliminating the need for complete replacement and significantly reducing operating costs; the micro-throttling orifice 508 on the valve core 507 of the slow-release valve is for the secondary slow-release injection flow... The core of the flow control system has an orifice size that can be preset according to the internal space and fire extinguishing requirements, which can precisely control the flow rate of the agent and prevent the agent from being sprayed out instantly due to excessive pressure. This ensures that the capillary network 510 can continuously and evenly deliver the agent. The cooperation between the main pipe 509 and the capillary network 510 achieves the dispersion and coverage of the agent. Furthermore, the capillary network 510 can be arranged along the inner wall of the box 100 and the gaps between components. The micro-orifice nozzles on its outer wall can atomize the agent into fine particles, covering blind spots such as the corners of the box 100 and the bottom of the circuit breaker 400 that are difficult to reach by traditional fixed nozzles, forming a full-area protection.

[0029] according to Figure 6 as well as Figure 9 As shown, the first-level trigger and dual-valve linkage injection integrated assembly 600 also includes a branch pipe 601, a support frame 616, and two annular frames 619. The bottom of the branch pipe 601 is connected to a quick-release valve body 602. A release valve core 603 is slidably connected between the inner surfaces of the quick-release valve body 602, and the top of the release valve core 603 and the top of the inner surface of the quick-release valve body 602 are conical mating surfaces.

[0030] In this embodiment of the invention, firstly, the branch pipe 601 serves as the connecting link between the main pipe 509 and the quick-release valve body 602, allowing direct diversion of high-pressure agent from the main pipe 509 to ensure a sufficient agent supply during the first-stage rapid injection; the support frame 616 and the annular frame 619 provide fixed support for the lever 618 and the miniature high-pressure gas cylinder 620, respectively. The support frame 616 is connected to the mounting plate 300 by bolts, ensuring the stability of the fulcrum when the lever 618 rotates, thereby preventing linkage failure due to loose support; secondly, the annular frame 619... The miniature high-pressure gas cylinder 620 is symmetrically clamped and fixed to prevent it from shaking due to pressure release when triggered. At the same time, the conical mating surface design of the release valve core 603 and the quick-release valve body 602 provides better sealing performance than a flat seal. Under normal conditions, it can fit tightly against the top of the valve body 100 to prevent agent leakage. Furthermore, the sliding mating structure of the release valve core 603 and the quick-release valve body 602 allows the release valve core 603 to move down quickly under the drive of the connecting rod 605, reducing opening delay and ensuring that the agent can be sprayed to the core ignition source as soon as possible.

[0031] according to Figures 8-9 As shown, a first spring 604 is sleeved on the outer surface of the release valve core 603. One end of the outer wall of the first spring 604 is fixedly connected to the bottom boss of the inner surface of the quick release valve body 602. A universal joint connector 607 is connected to the bottom of the quick release valve body 602. A diffusion-type injection nozzle 608 is connected to the bottom of the universal joint connector 607.

[0032] In this embodiment of the invention, the first spring 604 is normally in a compressed state, and its elastic force pushes the release valve core 603 upward, ensuring that the conical surface of the release valve core 603 is tightly fitted with the top of the quick-release valve body 602, thereby enhancing the sealing effect. When the fire triggering linkage 605 presses down on the release valve core 603, the first spring 604 can also provide reverse buffering to prevent the release valve core 603 from being damaged by excessive impact force, thus extending the service life of the components. The universal joint 607 gives the diffuser nozzle 608 flexible angle adjustment capability. During installation, the spray direction of the diffuser nozzle 608 can be adjusted according to the actual position of the circuit breaker 400, ensuring that the agent can be accurately aimed at the heat point, solving the problem that the traditional fixed diffuser nozzle 608 has a fixed position and is difficult to adapt to different component layouts. Secondly, the diffuser nozzle 608 can atomize the agent into a conical jet, with a larger coverage area than the direct nozzle, which can quickly wrap the core fire source such as the circuit breaker 400, shorten the fire extinguishing time, and reduce the risk of fire spread.

[0033] according to Figure 9As shown, the outer surface of the release valve core 603 and the inner surface of the connecting rod 605 are sleeved and connected. The outer wall of the connecting rod 605 is penetrated by the first rotating rod 606. A groove 628 is opened on one side of the outer wall of the quick release valve body 602. The two sides of the inner wall of the groove 628 are movably connected to the two sides of the outer wall of the first rotating rod 606. A housing 609 is provided on one side of the outer wall of the quick release valve body 602. A push rod 610 is installed between the inner surfaces of the housing 609, and the bottom of the push rod 610 is embedded and connected to the top of the temperature sensing glass ball 627.

[0034] In this embodiment of the invention, firstly, the sleeve connection between the connecting rod 605 and the release valve core 603 is easier to disassemble than welding or bolting. During later maintenance, either the connecting rod 605 or the release valve core 603 can be replaced separately, reducing maintenance costs. Secondly, the first rotating rod 606 is assembled inside the groove 628 and forms a sliding fit with the inner wall of the groove 628. The opening range of the groove 628 is designed to be larger than the range of motion of the first rotating rod 606, providing sufficient space for the rotation and radial sliding of the first rotating rod 606, avoiding interference with the inner wall of the groove during movement. Its lever arm ratio is designed to be 1:2, which amplifies the expansion force of the silicone sleeve 615. Even if the expansion stroke of the silicone sleeve 615 is small, the lever arm amplification effect can still push the release valve core 603 to move downwards quickly, ensuring reliable valve opening. To prevent dust and moisture from entering the internal transmission through the groove gaps, The component, groove 628, is filled with a suitable silicone foam strip as a sealing material. This silicone foam strip material is both soft and wear-resistant. It is hollow and wrapped around the outer wall of the first rotating rod 606 and the connecting rod 605 and the inner wall of the groove 628. It does not hinder the rotation and forward sliding of the first rotating rod 606, and it can fill the gap tightly with its own elasticity to form a reliable seal and prevent the component from jamming due to the corrosion of impurities. In addition, the housing 609 serves as a protective shell for the trigger head, which can isolate the dust and moisture inside the box from the corrosion of components such as the push rod 610 and the piston 611, and prevent the components from rusting and jamming. At the same time, the push rod 610 is embedded and connected to the temperature-sensing glass ball 627, which increases the contact area between the two and makes the heat transfer more direct. After the temperature-sensing glass ball 627 breaks, it can instantly push the push rod 610 upward, reduce the trigger delay, and ensure the rapid connection between temperature exceeding the standard and the trigger action.

[0035] according to Figure 9 As shown, the piston 611 is integrally formed on the outer surface of the push rod 610. The inner surface of the housing 609 is connected to the outer surface of the sealing diaphragm 612, and the inner surface of the sealing diaphragm 612 and the outer surface of the push rod 610 are in sliding fit. A top cover 614 is connected between the inner surfaces of the housing 609. The inner surface of the top cover 614 is connected to the outer surface of the silicone sleeve 615. A second spring 613 is fixedly connected to the opposite side of the top cover 614 and the sealing diaphragm 612. One end of the outer wall of the connecting rod 605 and the long side end of the lever 618 are both located on the top of the silicone sleeve 615.

[0036] In this embodiment of the invention, the integral molding structure of the push rod 610 and the piston 611 avoids the problem of loose connection between the two, ensuring that when the push rod 610 moves upward, it can synchronously drive the piston 611 to squeeze the sealing diaphragm 612. The sealing diaphragm 612 can seal the internal space of the housing 609 to prevent dust from entering and affecting the operation of the components. On the other hand, its sliding fit design does not hinder the up and down movement of the push rod 610, achieving compatibility between sealing and operation. Secondly, the second spring 613 normally presses the sealing diaphragm 612 downward, indirectly allowing the push rod 610 to press against the temperature-sensing glass ball 627, ensuring that the temperature-sensing glass ball... 627 remains in close contact with the equipment surface, improving the accuracy of temperature sensing; at the same time, the top cover 614 not only seals the top of the housing 609, but also fixes the position of the silicone sleeve 615, allowing the silicone sleeve 615 to expand only upwards and outwards, avoiding inward concavity that would cause force loss; the design of the connecting rod 605 and the lever 618 being placed on top of the silicone sleeve 615 is the key to single-trigger dual-linkage, where the expansion of the silicone sleeve 615 can simultaneously push two components, realizing the synchronous action of the quick-release valve body 602 and the firing valve body 621, eliminating the need for two additional trigger structures and simplifying the system design.

[0037] according to Figure 10 As shown, one side of the outer wall of the support frame 616 is bolted to one side of the outer wall of the mounting plate 300. Two connecting plates 617 are fixedly connected to the top of the support frame 616. A solid rod is connected between the outer walls of the two connecting plates 617. The outer surface of the solid rod is movably connected to the inner surface of the lever 618.

[0038] In this embodiment of the invention, the support frame 616 is first bolted to the mounting plate 300, which facilitates the adjustment of the position of the support frame 616 according to the layout of the components inside the box, thereby improving the adaptability of the device. The two connecting plates 617 clamp and fix the solid rod, which is more stable than single-end fixing and prevents the solid rod from bending or shifting when the lever 618 rotates. Secondly, the solid rod is made of stainless steel, which has high strength and good wear resistance, ensuring smooth rotation of the lever 618 without causing action delay due to excessive gaps. This combination structure of support frame 616, connecting plates 617, and solid rod can also change the height of the solid rod by adjusting the spacing of the connecting plates 617, thereby adapting to the installation requirements of levers 618 of different lengths and improving the versatility of the components.

[0039] according to Figures 10-11As shown, one side of the outer wall of the two ring frames 619 is bolted to one side of the outer wall of the mounting plate 300. A miniature high-pressure gas cylinder 620 is fixedly connected between the inner surfaces of the two ring frames 619. The top of the miniature high-pressure gas cylinder 620 is connected to the valve body 621 of the firing valve. The bottom conical surface of the inner surface of the firing valve body 621 is fitted with the valve core 622 of the firing valve. A third spring 623 is sleeved on the outer surface of the valve core 622. The top of the third spring 623 is connected to the valve body of the firing valve. The inner surface of 621 is fixedly connected to the top boss. A pressure rod 624 is fixedly connected to one side of the outer wall of the firing valve core 622. A second rotating rod 625 passes through the outer wall of the pressure rod 624. A hole is opened on one side of the outer wall of the firing valve body 621. The inner walls of the hole and the two ends of the outer walls of the second rotating rod 625 are movably connected. The top of the firing valve body 621 is connected to a gas supply pipe 626, and the gas supply end of the gas supply pipe 626 is connected to the gas inlet end of the gas filling interface 504.

[0040] In this embodiment of the invention, the symmetrical design of the ring frame 619 firstly distributes the weight of the miniature high-pressure gas cylinder 620 evenly, preventing the miniature high-pressure gas cylinder 620 from tilting due to unilateral force, and ensuring the sealing of the connection between the firing valve body 621 and the gas pipeline 626; the combination of the conical mating surface of the firing valve core 622 and the third spring 623 is consistent with the sealing logic of the first-stage release valve. Under normal conditions, the third spring 623 presses the firing valve body 621 downward to ensure that the miniature high-pressure gas cylinder 620 does not leak. When triggered, the pressure rod 624 pushes the firing valve core 622 upward to quickly open the valve, ensuring a reliable structure and consistent action; the two ends of the second rotating rod 625 pass through the holes opened on the firing valve body 621 and form a sliding fit with the inner wall of the holes. The opening range of the holes is designed to be larger than the range of motion of the end of the second rotating rod 625, providing sufficient space for its rotation and necessary radial displacement. As the fulcrum of the pressure rod 624, the force... The 3:1 arm ratio design significantly amplifies the force of lever 618. Even if the force transmitted by lever 618 is small, it can easily overcome the elastic restoring force of the third spring 623, further compressing the third spring 623 and ensuring reliable opening of the firing valve. To prevent dust and moisture from entering the transmission mechanism through the gaps in the holes, silicone foam strips are filled inside the holes. This material is wrapped and adheres to the outer wall of the second rotating rod 625 and the pressure rod 624 and the inner wall of the holes. It is both soft and elastic, and can adapt to deformation as the second rotating rod 625 rotates and slides. It does not generate movement resistance and can tightly fill the gaps to form an effective seal. At the same time, the gas pipeline 626 is directly connected to the firing valve and the inflation port 504 of the flexible pressure bladder 502, so that the high-pressure gas released by the miniature high-pressure gas cylinder 620 can quickly replenish the flexible pressure bladder 502. This solves the problem of pressure drop and inability to continue extinguishing fires after the agent is released in traditional fire extinguishing devices, and fundamentally eliminates the risk of reignition.

[0041] During use, throughout the entire operation of the device, the safety door 200 of the enclosure 100 remains closed, preventing personnel from accidentally touching the electrical components inside and creating a relatively enclosed space for subsequent fire extinguishing. Core components such as the circuit breaker 400 fixed on the mounting plate 300 operate normally. The temperature-sensing glass bulb 627 in the primary trigger and dual-valve linkage spray integrated assembly 600 is in close contact with the surface of heat-generating components such as the circuit breaker 400. Under the elastic force of the second spring 613, the push rod 610 presses the sealing diaphragm 612 through the piston 611, ensuring a tight fit between the temperature-sensing glass bulb 627 and the component surface, and eliminating temperature transfer delay. At this time, pressure accumulation and secondary slow release... Within the flexible pressure reservoir 502 of the spray integrated assembly 500, high-pressure extinguishing agent is in a standby state. The fixed frame 501 restricts its expansion range to prevent compression of surrounding components. The agent outlet 503 is sealed and connected to the delivery pipeline 505. The slow-release valve core 507 within the slow-release control valve body 506 maintains low-pressure standby through a micro-throttle orifice 508 to prevent accidental agent spraying. If the circuit breaker 400 experiences abnormally high temperatures due to overload, short circuit, etc., and the temperature reaches the threshold of the heat-sensing glass bulb 627, it should be noted that the preset thrust of the second spring 613 is precisely calibrated and always less than the instantaneous impact force generated when the heat-sensing glass bulb 627 bursts. In the normal state, the thrust of the second spring 613 can only maintain the tight fit between the push rod 610 and the temperature-sensing glass ball 627. However, when the temperature-sensing glass ball 627 breaks due to reaching the specified temperature, the instantaneous impact force it releases will break through the constraint of the thrust of the second spring 613, further compressing the second spring 613, causing the piston 611 to squeeze the sealing diaphragm 612, and then pushing the silicone sleeve 615 under the top cover 614 of the housing 609 to expand axially and radially. At this time, after the silicone sleeve 615 expands, it lifts one end of the connecting rod 605, and then the connecting rod 605 rotates around the first rotating rod 606 assembled in the groove 628 of the quick release valve body 602. While rotating, The first rotating rod 606 will slide relative to the grooves on both sides of the inner wall of the groove 628. The silicone foam strip filled in the groove 628 will adapt to the deformation of the connecting rod 605, which will not hinder the sliding and can maintain the seal, thereby completely eliminating the motion interference of the arc-shaped motion trajectory. With the help of the 1:2 lever arm ratio to amplify the force, the valve core 603 of the pressure release valve will further compress the first spring 604, causing the quick release valve body 602 to open. Then, the high-pressure agent delivered by the branch pipe 601 will be adjusted in direction by the universal joint 607 and will form a cone-shaped jet through the diffusion-type spray nozzle 608, which will accurately cover the core fire source such as the circuit breaker 400, thereby quickly suppressing the initial fire.On the other hand, the silicone sleeve 615 simultaneously lifts the long end of the lever 618. The lever 618 rotates around the solid rod fixed by the connecting plate 617 on the support frame 616, while the short end presses down on the pressure rod 624. The pressure rod 624 rotates around the second rotating rod 625 assembled in the hole of the firing valve body 621. At the same time, the second rotating rod 625 slides relative to each other along the grooves on both sides of the inner wall of the hole. The silicone foam strip in the hole adapts and deforms synchronously, effectively avoiding motion interference. Using a 3:1 lever arm ratio, the firing valve core 622 is pushed to further compress the third spring 623 and move upward, opening the miniature high-pressure gas cylinder 620. At the same time, high-pressure gas enters the flexible pressure bladder 502 through the gas pipeline 626 and the inflation port 504 of the flexible pressure bladder 502, replenishing the agent spray. The pressure consumed by the injection ensures a continuous supply of extinguishing agent; simultaneously, the agent in the flexible pressure bladder 502 enters the slow-release control valve body 506 through the agent outlet 503 and the delivery pipeline 505. After the flow rate is regulated by the micro throttling orifice 508, it is delivered by the main pipeline 509 to the capillary network 510 arranged along the inner wall of the box 100 and the gaps between components. Then, the agent is atomized through the micro-orifice nozzle, covering the bottom of the circuit breaker 400, the corners of the box, and other blind spots, forming a full-area protection to prevent reignition. After the fire is extinguished, only a new heat-sensing glass bulb 627 needs to be replaced, and the high-pressure extinguishing agent is replenished to the flexible pressure bladder 502 through the inflation interface 504. The device can then return to standby status without disassembling the overall structure of the box 100, making operation and maintenance convenient and not affecting the subsequent normal operation of the distribution box.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A distribution box with automatic fire extinguishing capability, characterized in that: It includes a housing (100), a pressure storage and secondary slow-release injection integrated assembly (500), and a primary trigger and dual-valve linkage injection integrated assembly (600), wherein the pressure storage and secondary slow-release injection integrated assembly (500) and the primary trigger and dual-valve linkage injection integrated assembly (600) are installed inside the housing (100); The pressure storage and secondary slow-release injection integrated component (500) includes a flexible pressure storage bladder (502), a slow-release control valve body (506), and a set of capillary networks (510). The flexible pressure storage bladder (502) is filled with high-pressure fire extinguishing agent. The inner surface of the slow-release control valve body (506) is provided with micro-throttling orifices (508), which are used to precisely control the agent flow rate of the injection branch. The outer surface of the set of capillary networks (510) is provided with micro-orifice injection heads, and the capillary networks (510) are used to realize the dispersion and delivery of the agent and adapt to the narrow gaps inside the box (100). The first-level trigger and dual-valve linkage injection integrated assembly (600) includes a connecting rod (605), a first rotating rod (606), a silicone sleeve (615), a lever (618), and a temperature-sensitive glass ball (627). The connecting rod (605) and the first rotating rod (606) are used to amplify the expansion force of the silicone sleeve (615). The silicone sleeve (615) is used to convert linear displacement into axial and radial expansion forces. The lever (618) is used to amplify the expansion force of the silicone sleeve (615). The temperature-sensitive glass ball (627) is used to rupture instantaneously when the temperature reaches a threshold.

2. The automatic fire-extinguishing distribution box according to claim 1, characterized in that: A safety door (200) is connected to one side of the outer wall of the enclosure (100), and an installation plate (300) is fixedly connected to one side of the inner wall of the enclosure (100). A circuit breaker (400) is provided on one side of the outer wall of the installation plate (300).

3. The automatic fire-extinguishing distribution box according to claim 2, characterized in that: The pressure storage and secondary slow-release injection integrated assembly (500) also includes two fixed frames (501), the tops of the two fixed frames (501) are bolted to the top of the inner wall of the housing (100), and the inner surfaces of the two fixed frames (501) are attached to the outer surface of the flexible pressure storage bladder (502).

4. The automatic fire-extinguishing distribution box according to claim 3, characterized in that: The bottom of the flexible pressure reservoir (502) is provided with a drug outlet (503) and an inflation port (504). The bottom of the drug outlet (503) is connected to a delivery pipe (505). One end of the outer wall of the delivery pipe (505) is connected to one side of the outer wall of the slow-release control valve body (506). The inner surface of the slow-release control valve body (506) is connected to a slow-release valve core (507), and a micro throttling orifice (508) passes through the slow-release valve core (507). The top of the slow-release control valve body (506) is connected to a main pipe (509), and the main pipe (509) is connected to a set of capillary networks (510).

5. The automatic fire-extinguishing distribution box according to claim 4, characterized in that: The first-level trigger and dual-valve linkage injection integrated assembly (600) also includes a branch pipe (601), a support frame (616), and two annular frames (619). The bottom of the branch pipe (601) is connected to a quick-release valve body (602). A release valve core (603) is slidably connected between the inner surfaces of the quick-release valve body (602), and the top of the release valve core (603) and the top of the inner surface of the quick-release valve body (602) are conical mating surfaces.

6. The automatic fire-extinguishing distribution box according to claim 5, characterized in that: The outer surface of the release valve core (603) is fitted with a first spring (604). One end of the outer wall of the first spring (604) is fixedly connected to the bottom boss of the inner surface of the quick release valve body (602). The bottom of the quick release valve body (602) is connected to a universal joint connector (607), and the bottom of the universal joint connector (607) is connected to a diffusion-type injection nozzle (608).

7. The automatic fire-extinguishing distribution box according to claim 6, characterized in that: The outer surface of the release valve core (603) and the inner surface of the connecting rod (605) are sleeved and connected. The outer wall of the connecting rod (605) is penetrated by the first rotating rod (606). A groove (628) is opened on one side of the outer wall of the quick release valve body (602). The inner walls of the groove (628) are movably connected to the outer walls of the first rotating rod (606). A housing (609) is provided on one side of the outer wall of the quick release valve body (602). A push rod (610) is installed between the inner surfaces of the housing (609), and the bottom of the push rod (610) is embedded and connected to the top of the temperature-sensing glass ball (627).

8. The automatic fire-extinguishing distribution box according to claim 7, characterized in that: The piston (611) is integrally formed on the outer surface of the push rod (610). The inner surface of the housing (609) is connected to the outer surface of the sealing diaphragm (612), and the inner surface of the sealing diaphragm (612) and the outer surface of the push rod (610) slide together. A top cover (614) is connected between the inner surfaces of the housing (609). The inner surface of the top cover (614) is connected to the outer surface of the silicone sleeve (615). A second spring (613) is fixedly connected to the opposite side of the top cover (614) and the sealing diaphragm (612). One end of the outer wall of the connecting rod (605) and the long side end of the lever (618) are both located on the top of the silicone sleeve (615).

9. A power distribution box with automatic fire extinguishing capability according to claim 8, characterized in that: The outer wall of the support frame (616) is bolted to one side of the outer wall of the mounting plate (300). Two connecting plates (617) are fixedly connected to the top of the support frame (616). A solid rod is connected between the outer walls of the two connecting plates (617). The outer surface of the solid rod is movably connected to the inner surface of the lever (618).

10. A power distribution box with automatic fire extinguishing capability according to claim 5, characterized in that: One side of the outer wall of the two ring frames (619) is bolted to one side of the outer wall of the mounting plate (300). A miniature high-pressure gas cylinder (620) is fixedly connected between the inner surfaces of the two ring frames (619). The top of the miniature high-pressure gas cylinder (620) is connected to the valve body (621). The bottom conical surface of the inner surface of the valve body (621) is fitted with the valve core (622). A third spring (623) is sleeved on the outer surface of the valve core (622). The top of the third spring (623) is connected to the valve body (620). The inner surface of the valve body (621) is fixedly connected to the top boss. A pressure rod (624) is fixedly connected to one side of the outer wall of the valve core (622). A second rotating rod (625) passes through the outer wall of the pressure rod (624). A hole is opened on one side of the outer wall of the valve body (621). The inner walls of the hole and the two ends of the outer walls of the second rotating rod (625) are movably connected. The top of the valve body (621) is connected to a gas supply pipe (626), and the gas supply end of the gas supply pipe (626) is connected to the gas inlet end of the gas filling interface (504).

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