Multi-phase water self-sealing multi-pivot joint explosion-proof device

Abstract

The present application relates to a multiphase water self-sealing multi-pivot joint anti-explosion device, belonging to the technical field of anti-explosion devices, and is used to solve the technical problems of poor anti-explosion effect and low safety of anti-explosion devices. The anti-explosion device includes: an explosion-proof housing, a connecting pipeline, a first gravity airtight valve, and a first airtight valve gravity hammer. The explosion-proof housing is of a cylindrical structure, and the explosion-proof housing is suitable for containing water; the connecting pipeline includes: an air flow channel, a first opening and a second opening communicated with the air flow channel. The first opening is suitable for communicating with an explosive fluid, the second opening is communicated with the explosion-proof housing, and the second opening is located below the water level; the first gravity airtight valve has a first state and a second state. In the first state, the first gravity airtight valve can be closed under the gravity of the first airtight valve gravity hammer to disconnect the first opening from the second opening. In the second state, the first gravity airtight valve can be opened under the action of the air explosion airflow to connect the first opening with the second opening.

Description

Technical Field

[0001] This application relates to the field of explosion-proof device technology, and in particular to a multiphase water self-sealing multi-hub explosion-proof device. Background Technology

[0002] In many industrial sectors such as chemical, petroleum, and mining, and in the production, transportation, and storage of flammable and explosive materials, explosions often cause enormous casualties, property damage, and environmental pollution. To effectively prevent and control explosion hazards, various explosion-proof devices are widely used in industrial production.

[0003] Traditional explosion-proof devices primarily reduce the destructive force of an explosion through physical isolation and pressure relief. For example, common explosion-proof doors and walls rely mainly on their structural strength to withstand the blast impact. However, they cannot immediately stop the propagation of the blast, and their structure is easily damaged after repeated impacts, affecting their explosion-proof effectiveness. Some devices employ pressure relief designs, which can release some of the blast pressure, but the high-temperature, high-pressure gases and flames generated by the explosion can still spread through the pressure relief vents, leading to secondary disasters.

[0004] Therefore, ensuring that explosion-proof devices have good explosion-proof performance and high safety has become one of the urgent technical problems to be solved. Utility Model Content

[0005] This application provides a multiphase water self-sealing multi-hub explosion-proof device to solve the technical problems of poor explosion-proof effect and low safety of explosion-proof devices in related technologies.

[0006] Based on this, this application provides a multiphase water self-sealing multi-hub explosion-proof device, including: an explosion-proof housing, a connecting pipeline, a first gravity shut-off valve, and a first shut-off device gravity hammer. The explosion-proof housing is a cylindrical structure, and the interior of the explosion-proof housing is suitable for containing water. The connecting pipeline includes: an airflow channel and a first opening and a second opening connected to the airflow channel. The first opening is suitable for communicating with the explosive fluid, and the second opening is connected to the explosion-proof housing and is located below the water surface. The first gravity shut-off valve has a first state and a second state. In the first state, the first gravity shut-off valve can close under the gravity of the first shut-off device gravity hammer to disconnect the first opening from the second opening. In the second state, the first gravity shut-off valve can open under the action of the explosive airflow to connect the first opening with the second opening.

[0007] Based on the multiphase water self-sealing multi-hub explosion-proof device provided in this application embodiment, when an explosion occurs, the high-pressure explosive gas flow generated by the explosion impacts the first gravity shut-off valve, which is in the first state (closed state). The powerful aerodynamic force can overcome the gravity of the first shut-off valve's weight hammer, causing the first gravity shut-off valve to switch to the second state, i.e., the open state. At this time, the explosive fluid enters the explosion-proof housing through the first opening, the airflow channel, and the second opening, and comes into full contact with the water inside the tank. Water, as a highly efficient energy absorption medium, can quickly absorb the shock wave energy and heat generated by the explosion, significantly reducing the destructive force of the explosion. Since the second opening is located below the water surface, the explosive fluid must pass through the water layer, further enhancing the dissipation effect of water on the explosion energy, effectively suppressing the further development of the explosion, thereby achieving highly efficient explosion protection.

[0008] Furthermore, the explosion-proof device provided in this application embodiment can effectively block the propagation path of an explosion. Under normal circumstances, the first gravity shut-off valve remains closed under the gravity of the first shut-off device's gravity hammer, cutting off the connection with the explosive fluid and preventing potentially dangerous gases or dust from entering the device and causing an explosion. When an explosion occurs, although the shut-off valve opens to allow the explosive fluid to enter the explosion-proof housing, the energy of the explosive fluid will be significantly attenuated after the explosion energy is absorbed by water and the shock wave is suppressed. At the same time, when the explosion pressure weakens and the explosive gas flow can no longer overcome the gravity of the first shut-off device's gravity hammer, the first gravity shut-off valve will automatically return to the closed state, cutting off the channel again and preventing the explosion flame and residual pressure from propagating to other areas, confining the explosion inside the explosion-proof housing and protecting the safety of surrounding equipment and personnel.

[0009] In some embodiments of this application, the connecting pipeline includes: an external explosion relief pipe and a gas pipe, the external explosion relief pipe having a first opening and a first flow channel communicating with the first opening; the gas pipe having a second opening and a second flow channel communicating with the second opening; the second flow channel communicating with the first flow channel, the first flow channel and the second flow channel constituting at least part of the airflow channel, and a first gravity air-closing valve being disposed on the first flow channel.

[0010] In some embodiments of this application, the height H from the second opening to the water surface satisfies: 10cm≤H≤50cm.

[0011] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device further includes: a water supply valve and a drain valve. The water supply valve is connected to an external water source and an explosion-proof housing through a first pipeline; the drain valve is connected to the explosion-proof housing through a second pipeline and is suitable for discharging water from the explosion-proof housing to the outside.

[0012] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device further includes: a water level gauge, disposed inside the explosion-proof housing, for detecting the water level inside the explosion-proof housing.

[0013] In some embodiments of this application, an accommodating cavity is provided inside the explosion-proof housing, and an opening communicating with the accommodating cavity is provided on the explosion-proof housing, the accommodating cavity being suitable for containing water;

[0014] The multiphase water self-sealing multi-hub explosion-proof device also includes: a first anti-overflow structure and a second anti-overflow structure, wherein the first anti-overflow structure is connected to the opening; and the second anti-overflow structure is connected to the opening and is located above the first anti-overflow structure.

[0015] In some embodiments of this application, the first anti-overflow structure includes: a flat plate structure with multiple mesh holes; the second anti-overflow structure includes: a lower cover, the lower cover being at least partially inverted conical in shape, and the lower cover having multiple mesh holes.

[0016] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device further includes: an upper cover, disposed at the opening and covering the upper cover, the upper cover being movably connected to the explosion-proof housing and adapted to open the upper cover when subjected to impact.

[0017] In some embodiments of this application, the height M of the first anti-overflow structure to the water surface satisfies: M≥10cm, and the height N of the second anti-overflow structure to the water surface satisfies: N≥10cm.

[0018] In some embodiments of this application, the external explosion relief pipe is also provided with a pressure relief port communicating with the first flow channel; the multiphase water self-sealing multi-hub explosion-proof device also includes: a second gravity air-closing valve and a second air-closing device gravity hammer, the second gravity air-closing valve is provided at the pressure relief port, and is suitable for blocking the pressure relief port under the action of the second air-closing device gravity hammer, and opening the pressure relief port under the action of the gas explosion airflow in the first flow channel. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0020] Figure 1 This is a structural schematic diagram of a multiphase water self-sealing multi-hub explosion-proof device provided in an embodiment of this application.

[0021] Attached label: 100 - Explosion-proof device;

[0022] 10-Explosion-proof housing; 11-Receiving cavity; 12-Opening;

[0023] 20 - Connecting pipe; 21 - Airflow channel; 22 - First opening; 23 - Second opening; 24 - External explosion relief pipe; 241 - First flow channel; 242 - Pressure relief port; 25 - Gas pipe; 251 - Second flow channel;

[0024] 30 - First gravity shut-off valve;

[0025] 40 - Gravity hammer of the first airlock;

[0026] 50 - Water supply valve;

[0027] 60 - Drain valve;

[0028] 70-Water level gauge;

[0029] 81-First spill prevention structure; 82-Second spill prevention structure; 83-Upper cover;

[0030] 91-Second gravity shut-off valve; 92-Second shut-off device gravity hammer; 93-Pressure explosion-proof membrane. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0035] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0036] Figure 1 This application provides a schematic diagram of the structure of a multiphase water self-sealing multi-hub explosion-proof device, as shown in the embodiment of the present application. Figure 1 As shown, the multiphase water self-sealing multi-hub explosion-proof device 100 includes: an explosion-proof housing 10, a connecting pipe 20, a first gravity shut-off valve 30, and a first shut-off gravity hammer 40. The explosion-proof housing 10, connecting pipe 20, first gravity shut-off valve 30, and first shut-off gravity hammer 40 can be made of high-strength and corrosion-resistant materials (e.g., stainless steel, nickel-based alloys, titanium alloys, etc.). This extends the maintenance cycle of the explosion-proof device 100. The explosion-proof housing 10, connecting pipe 20, first gravity shut-off valve 30, and first shut-off gravity hammer 40 are also connected by detachable connections (e.g., screw connections, snap-fit ​​connections, etc.), thus reducing the maintenance cost of the explosion-proof device 100.

[0037] The first gravity shut-off valve 30 is a device that automatically closes the valve using gravity to prevent air leakage. The first gravity shut-off valve 30 can be a counterweight for the first gravity shut-off valve 30, suitable for providing gravity to the first gravity shut-off valve 30 so that the first gravity shut-off valve 30 can automatically close the valve.

[0038] The explosion-proof housing 10 is suitable for containing water. The explosion-proof housing 10 can be a barrel structure or a cylinder structure, etc., and this application does not limit it.

[0039] Additionally, the connecting pipe 20 includes an airflow channel 21 and a first opening 22 and a second opening 23 connected to the airflow channel 21. The first opening 22 is adapted to communicate with the explosive fluid, and the second opening 23 is connected to the explosion-proof housing 10, and the second opening 23 is located below the water surface. Thus, when the explosive fluid flows into the airflow channel 21, the water inside the explosion-proof housing 10 can efficiently absorb the explosive impact, adapting to explosion-proof treatment in complex scenarios such as gas, dust, and hydrogen energy. Furthermore, in explosion-proof scenarios where flammable gases are generated during pyrolysis, this multiphase water self-sealing multi-hub explosion-proof device 100 can reduce the risk of deflagration turning into detonation, improving the service life and safety of the explosion-proof device 100. For example, the explosion pressure during lithium battery thermal runaway is 0.15 MPa ~ 0.3 MPa (some high-energy batteries may exceed 0.5 MPa). In emergency situations where the battery releases high-temperature, high-pressure gases during thermal runaway, the water seal structure (i.e., the water inside the explosion-proof housing 10) can quickly release energy and cool the reaction products, preventing deflagration from turning into detonation.

[0040] Furthermore, the first gravity-operated air-closing valve 30 has a first state and a second state. In the first state, the first gravity-operated air-closing valve 30 can close under the gravity of the first air-closing device's gravity hammer 40, thereby disconnecting the first opening 22 from the second opening 23. In the second state, the first gravity-operated air-closing valve 30 can open under the action of the explosive airflow, thereby connecting the first opening 22 with the second opening 23. That is, when the impact force of the explosive airflow is large, the first gravity-operated air-closing valve 30 can overcome the gravity of the first air-closing device's gravity hammer 40 under the action of the explosive airflow, opening the first gravity-operated air-closing valve 30 to connect the first opening 22 with the second opening 23.

[0041] Based on the multiphase water self-sealing multi-hub explosion-proof device 100 provided in this application embodiment, when an explosion occurs, the high-pressure gas explosion gas flow generated by the explosion will impact the first gravity shut-off valve 30, which is in the first state (closed state). The powerful aerodynamic force can overcome the gravity of the first shut-off valve's gravity hammer 40, causing the first gravity shut-off valve 30 to switch to the second state, i.e., the open state. At this time, the explosive fluid enters the explosion-proof housing 10 through the first opening 22, the airflow channel 21, and the second opening 23, and comes into full contact with the water in the tank. Water, as a highly efficient energy absorption medium, can quickly absorb the shock wave energy and heat generated by the explosion, significantly reducing the destructive force of the explosion. Since the second opening 23 is located below the water surface, the explosive fluid must pass through the water layer, further enhancing the dissipation effect of water on the explosion energy, effectively suppressing the further development of the explosion, thereby achieving highly efficient explosion protection.

[0042] Furthermore, the explosion-proof device 100 provided in this application embodiment can effectively block the propagation path of an explosion. Under normal circumstances, the first gravity shut-off valve 30 remains closed under the gravity of the first shut-off device's gravity hammer 40, cutting off the connection with the explosive fluid and preventing potentially dangerous gases or dust from entering the device and causing an explosion. When an explosion occurs, although the first gravity shut-off valve 30 opens to allow the explosive fluid to enter the explosion-proof housing 10, the energy of the explosive fluid will be significantly reduced after the explosion energy is absorbed by water and the shock wave is suppressed. At the same time, when the explosion pressure weakens and the gas explosion flow can no longer overcome the gravity of the first shut-off device's gravity hammer 40, the first gravity shut-off valve 30 will automatically return to the closed state, cutting off the channel again and preventing the explosion flame and residual pressure from propagating to other areas, confining the explosion inside the explosion-proof housing 10 and protecting the safety of surrounding equipment and personnel. In addition, compared with traditional equipment, this explosion-proof device 100 adopts a fully mechanical structure, has no electronic components, has strong anti-interference capabilities, and a low failure rate.

[0043] In some embodiments of this application, the connecting pipe 20 includes an external explosion relief pipe 24 and a gas pipe 25. The external explosion relief pipe 24 has a first opening 22 and a first flow channel 241 communicating with the first opening 22; the gas pipe 25 has a second opening 23 and a second flow channel 251 communicating with the second opening 23; the second flow channel 251 communicates with the first flow channel 241, and the first flow channel 241 and the second flow channel 251 constitute at least a portion of the airflow channel 21. A first gravity-operated airlock valve 30 is disposed on the first flow channel 241.

[0044] This embodiment of the application provides a directional release channel for the high pressure generated by the explosion by setting an external explosion relief pipe 24. In the initial stage of the explosion, the explosive gas flow can flow into the first channel 241 through the first opening 22, and the pressure can be transmitted along a preset path, avoiding the rupture of surrounding equipment due to the pressure having nowhere to be released. At the same time, the first gravity air-closing valve 30 is set on the first channel 241. When the pressure of the explosive gas flow weakens, the first gravity air-closing valve 30 closes under the gravity of the first air-closing device gravity hammer 40, effectively preventing external air from flowing back into the explosion area, avoiding the formation of a new explosive gas mixture, and improving the controllability and safety of the explosion.

[0045] In some embodiments of this application, the height H from the second opening 23 to the water surface satisfies: 10cm≤H≤50cm.

[0046] For example, the height H can be 10cm, 20cm, 30cm, 40cm or 50cm, etc.

[0047] It should be noted that if H is too small, the water's buffering effect on the fluid entering the water layer will be insufficient, potentially failing to effectively block the flame or absorb enough impact energy. This could cause some of the fluid that has not fully absorbed energy to overflow from the water surface, leading to secondary hazards. If H is too large, while it can enhance the suppression effect on the explosive fluid, it will increase the water pressure at the second opening 23. When the explosion pressure is transmitted to the second opening 23 through the pipeline, the excessive water pressure may hinder the explosive fluid from smoothly entering the container, affecting the pressure release efficiency. In this embodiment, by ensuring that 10cm ≤ H ≤ 50cm, it is possible to ensure that the explosion pressure can smoothly push the fluid through the water layer for release, while also utilizing the water layer to form an effective seal, preventing the leakage of explosion flames and residual gas, and ensuring the safety of the surrounding environment.

[0048] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device 100 further includes: a water supply valve 50 and a drain valve 60. The water supply valve 50 is connected to an external water source and the explosion-proof housing 10 through a first pipeline; the drain valve 60 is connected to the explosion-proof housing 10 through a second pipeline and is adapted to discharge the water inside the explosion-proof housing 10 to the outside.

[0049] The structures of the drain valve 60 and the water supply valve 50 may be the same or different, and this application does not limit them. Optionally, the drain valve 60 and the water supply valve 50 may be shut-off valves, check valves, solenoid valves or pneumatic valves, etc., and this application does not limit them.

[0050] For example, when a gas / dust explosion occurs and the pressure is greater than 0.1 MPa, the instantaneously generated high-pressure shock wave pushes the water surface to fluctuate violently through the first opening 22 and the first flow channel 241. At this time, the drain valve 60 and the water supply valve 50 can work together to ensure the working height of the water level.

[0051] The water supply valve 50 in this embodiment is connected to an external water source and can automatically or manually replenish water through the first pipeline. During the operation of the explosion-proof device 100, water will be lost due to splashing caused by the explosion impact and evaporation caused by high temperature. If the water level drops, it will directly affect the explosion-proof effect of the device. When the water level is lower than the set threshold, the water supply valve 50 can be opened to replenish the water in the explosion-proof housing 10 in time, ensuring that the second opening 23 is always at the preset height below the water surface, maintaining the condition of full contact between the explosive fluid and the water, and continuously exerting the absorption and buffering effect of water on the explosion energy.

[0052] In addition, the drain valve 60 discharges water from the explosion-proof water tank to the outside through a second pipeline. Therefore, when the water level is too high, the drain valve 60 can automatically or manually drain the water to ensure the water level remains at the preset height. Furthermore, after prolonged use of the explosion-proof device 100, impurities such as dust, residue, and harmful chemicals generated during an explosion may enter the water. These impurities can reduce the water's heat absorption and buffering properties, and may even corrode the device's components. Thus, wastewater can be discharged through the drain valve 60, and clean water can be replenished using the water supply valve 50, ensuring water purity and maintaining its excellent explosion-proof performance.

[0053] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device 100 further includes: a water level gauge 70, which can be installed inside the explosion-proof housing 10 to detect the water level inside the explosion-proof housing 10.

[0054] The water level gauge 70, also known as a liquid level gauge or liquid level indicator, is an instrument used to measure the height of liquid. The water level gauge 70 can monitor water level changes in real time, preventing equipment damage or safety accidents caused by abnormal water levels. Optionally, the water level gauge 70 can be a float-type water level gauge 70 or an acoustic / ultrasonic water level gauge 70, etc., and this application does not limit it to any particular type.

[0055] In this way, water level information can be obtained directly through water level gauge 70, ensuring that the second opening 23 is always below the appropriate water level, so that the explosive fluid can fully contact the water after entering the explosion-proof housing 10, and maintain the high efficiency of water in absorbing and buffering explosive energy.

[0056] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device 100 may further include: a controller, which is electrically connected to the water level gauge 70, the drain valve 60 and the water supply valve 50, and the controller is adapted to control the opening and closing of the drain valve 60 and the water supply valve 50 according to the water level detected by the water level gauge 70.

[0057] For example, the water level gauge 70 monitors the water level inside the explosion-proof housing 10 in real time. When the water level falls below the preset height due to evaporation or slight leakage, the controller activates the water supply valve 50. When the water level reaches the preset height, the controller closes the water supply valve 50. If the water level is too high (e.g., due to backflow or misoperation), the controller automatically opens the drain valve 60 to drain water, ensuring that the water level is always at the preset level.

[0058] This embodiment of the application electrically connects the controller to the water level gauge 70, the drain valve 60, and the water supply valve 50. This allows the controller to receive real-time liquid level data from the water level gauge 70 and control the system according to a preset water level threshold. When the water level is below the preset threshold, the controller quickly sends an opening command to the water supply valve 50 to replenish water and ensure that the second opening 23 remains below the water surface, maintaining the water's absorption capacity for explosive energy. When the water level reaches above the preset threshold, the controller controls the drain valve 60 to open and discharge water. Compared to relying solely on manual intervention to adjust the water level, this method improves the accuracy and timeliness of water level control, ensuring stable operation of the explosion-proof device 100 under various working conditions and effectively enhancing its explosion-proof reliability.

[0059] In some embodiments of this application, the explosion-proof housing 10 is provided with a receiving cavity 11, and the explosion-proof housing 10 is provided with an opening 12 communicating with the receiving cavity 11, and the receiving cavity 11 is suitable for containing water.

[0060] In addition, the multiphase water self-sealing multi-hub explosion-proof device 100 also includes: a first anti-overflow structure 81 and a second anti-overflow structure 82, wherein the first anti-overflow structure 81 is connected to the opening 12; and the second anti-overflow structure 82 is connected to the opening 12 and is located above the first anti-overflow structure 81.

[0061] Optionally, the first anti-overflow structure 81 and the second anti-overflow structure 82 may include, but are not limited to, being fixedly connected to the opening 12 of the explosion-proof housing 10 by means of threaded connection, snap-fit ​​or riveting.

[0062] Thus, this embodiment of the application further optimizes the explosion-proof performance and operational stability of the device by setting a first anti-overflow structure 81 and a second anti-overflow structure 82. Both the first anti-overflow structure 81 and the second anti-overflow structure 82 can constrain and guide the water flow and explosive fluid. When an explosion occurs, the explosive fluid impacts the opening 12 and enters the receiving cavity 11. The anti-overflow structure prevents the water flow from overflowing disorderly under the impact, ensuring that the water is always in full contact with the explosive fluid within the receiving cavity 11, maintaining high energy absorption efficiency, and avoiding weakening the explosion-proof effect due to water loss. In addition, the first anti-overflow structure 81 and the second anti-overflow structure 82 form a double protection, reducing the risk of water overflow.

[0063] In some embodiments of this application, the first anti-overflow structure 81 includes a flat plate structure with multiple mesh openings, which can be arranged around the outer periphery of the gas duct 25.

[0064] Since the first anti-overflow structure 81 is a flat plate structure with multiple mesh openings, when an explosion occurs, the water is propelled upwards by the explosive fluid and broken into fine bubbles by the flat plate structure. This increases the gas-liquid contact area, preventing pressure buildup or energy loss of the explosive fluid due to structural obstruction, and ensuring that the water can absorb the explosion energy in a timely and sufficient manner. Simultaneously, the physical obstruction of water splashes caused by the explosion impact ensures that the liquid inside the explosion-proof device 100 will not overflow.

[0065] In some other embodiments of this application, the first anti-overflow structure 81 may include a plate-like structure that seals the opening 12.

[0066] In some embodiments of this application, the second anti-overflow structure 82 includes a lower cover, which is at least partially inverted conical in shape and has a plurality of mesh openings.

[0067] In this embodiment, the lower cover is designed as an inverted cone shape, allowing water to slide down the slope. The water is redirected downwards by gravity, preventing it from continuously impacting upwards and overflowing from the opening 12.

[0068] In addition, the multiple mesh openings on the cover not only ensure the smooth flow of water but also further prevent the water from being broken into fine air bubbles, increasing the gas-liquid contact area and thus forming a gas-liquid two-phase barrier. This reduces the impact of an explosion and prevents the accumulation of pressure or energy loss of the explosive fluid due to structural obstruction, ensuring that the water can absorb the explosion energy in a timely and sufficient manner. At the same time, the physical obstruction of water splashes caused by the explosion impact ensures that the liquid inside the explosion-proof device 100 will not spill out.

[0069] In some other embodiments of this application, the second anti-overflow structure 82 may also include a plate-like structure that seals the opening 12.

[0070] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device 100 further includes: an upper cover 83, disposed at the opening 12 and covering the upper cover, the upper cover 83 being movably connected to the explosion-proof housing 10 and adapted to open the upper cover 83 when subjected to impact.

[0071] For example, the upper cover 83 can be placed above the explosion-proof housing 10 so that the upper cover 83 can be opened in the event of an impact. For example, the upper cover 83 can also be hinged and rotatably connected to the explosion-proof housing 10 so that the upper cover 83 can be opened in the event of an impact.

[0072] Furthermore, the materials of the upper cover 83, the first anti-overflow structure 81, and the second anti-overflow structure 82 can be the same or different, and this application does not limit this. For example, the materials of the upper cover 83, the first anti-overflow structure 81, and the second anti-overflow structure 82 can be 316L stainless steel or ceramic composite materials, etc. In this way, the upper cover 83, the first anti-overflow structure 81, and the second anti-overflow structure 82 have advantages such as corrosion resistance and impact resistance, and can facilitate the cleaning of deposits (such as dust and scale) inside the explosion-proof device 100.

[0073] It is understandable that when an explosion occurs, the instantaneously generated high-pressure gas flow will rapidly accumulate pressure within the explosion-proof housing 10. In this embodiment, by movably connecting the upper cover 83 to the explosion-proof housing 10 and positioning it at the opening 12 to cover the lower cover, the upper cover 83 can be pushed open under the powerful pressure generated by the explosion. This provides a safe release channel for the high-pressure gas within the explosion-proof housing 10, preventing the explosion-proof housing 10 or other components from being damaged due to overpressure caused by a continuous increase in pressure. This protects the overall structural integrity of the explosion-proof device 100 and reduces equipment maintenance and replacement costs.

[0074] In some embodiments of this application, the height M of the first anti-overflow structure 81 to the water surface satisfies: M ≥ 10 cm, and the height N of the second anti-overflow structure 82 to the water surface satisfies: N ≥ 10 cm. Exemplarily, the height M can be 10 cm, 12 cm, 14 cm, 16 cm, or 18 cm, etc. Exemplarily, the height N can also be 10 cm, 12 cm, 14 cm, 16 cm, or 18 cm, etc., and this application does not limit this.

[0075] When the height M of the first anti-overflow structure 81 to the water surface is ≥10cm, and the height N of the second anti-overflow structure 82 to the water surface is ≥10cm, sufficient buffer space is provided for the water flow. Under the impact of an explosion, the water will generate an upward impact force and splash due to violent tremors. Sufficient height allows the water flow more space to dissipate energy before impacting the anti-overflow structure, slowing down the impact speed and preventing the impact force from being reflected and superimposed between the two (i.e., the first anti-overflow structure 81 and the second anti-overflow structure 82) due to the small distance, which would increase the destructive force of the impact.

[0076] The first anti-overflow structure 81 and the second anti-overflow structure 82 of this application embodiment can effectively buffer pressure when subjected to water flow impact, reduce the risk of structural damage due to instantaneous high pressure, and effectively prevent water flow from overflowing.

[0077] In some embodiments of this application, the external explosion relief pipe 24 is also provided with a pressure relief port 242 communicating with the first flow channel 241; the multiphase water self-sealing multi-hub explosion-proof device 100 further includes: a second gravity air-closing valve 91 and a second air-closing device gravity hammer 92, the second gravity air-closing valve 91 is disposed at the pressure relief port 242, and is adapted to block the pressure relief port 242 under the action of the second air-closing device gravity hammer 92, and to open the pressure relief port 242 under the action of the gas explosion airflow in the first flow channel 241.

[0078] The second gravity shut-off valve 91 and the second shut-off device gravity hammer 92 can be referred to the description of the first gravity shut-off valve 30 and the first shut-off device gravity hammer 40 above, and will not be repeated here.

[0079] This embodiment of the application provides a pressure relief path for the explosion-proof device 100 by setting a pressure relief port 242 and a second gravity air-closing valve 91. That is, when an explosion occurs, the pressure of the gas explosion gas in the first flow channel 241 gradually increases until it can overcome the gravity of the second air-closing valve's gravity hammer 92. At this point, the second gravity air-closing valve 91 opens, and the high-pressure gas is discharged through the pressure relief port 242.

[0080] This avoids excessive pressure buildup within the device, preventing rupture of components such as the explosion-proof housing 10 and connecting pipes 20 due to excessive pressure, and reducing the risk of explosion energy spreading to the surrounding area. Compared to relying solely on the explosion-proof housing to absorb energy, the pressure relief port 242 can release some pressure in the early stages of an explosion, reducing the burden on the explosion-proof housing and enabling the device to control internal pressure within a safe range when facing explosions of varying intensities, thus improving explosion-proof safety.

[0081] In addition, the second airlock gravity hammer 92 can close the second gravity airlock valve 91 under the action of gravity after the explosion-proof device 100 is depressurized, so as to prevent outside air from entering the explosion-proof device 100 and avoid secondary explosion.

[0082] In some embodiments of this application, the multiphase water self-sealing multi-hub explosion-proof device 100 further includes: a pressure explosion-proof membrane 93, which is disposed at the pressure relief port 242. The pressure explosion-proof membrane 93 is adapted to connect the first flow channel 241 with the pressure relief port 242 when the pressure is greater than a preset pressure value (e.g., 0.2 MPa).

[0083] Thus, the pressure-resistant explosion-proof diaphragm 93, in conjunction with the second gravity-operated shut-off valve 91, further enhances the accuracy of pressure release. Since the second gravity-operated shut-off valve 91 relies on a gravity hammer for opening and closing, its opening pressure is affected by factors such as installation angle and wear of the gravity hammer, resulting in a certain fluctuation range. In contrast, the pressure-resistant explosion-proof diaphragm 93 uses a preset pressure value (e.g., 0.2 MPa) as the explosion trigger condition, with an extremely small error range, enabling more precise control of the pressure within the first flow channel 241. When the explosion pressure rises to near but not yet reach the opening threshold of the second gravity-operated shut-off valve 91, if the pressure at this time reaches the preset value of the explosion-proof diaphragm, the diaphragm immediately ruptures to release pressure, preemptively releasing some of the pressure and preventing the continuous pressure rise from impacting the device, effectively reducing the risk of explosion caused by uncontrolled pressure.

[0084] Based on the multiphase water self-sealing multi-hub explosion-proof device 100 described above, after an explosion, the water supply valve 50 and drain valve 60 can be closed first, the first anti-overflow structure 81, the second anti-overflow structure 82, and the upper cover 83 can be disassembled, and the explosion-proof housing 10 can be rinsed to remove metal debris or coking. Then, the drain valve 60 can be opened to discharge the contaminated water containing explosion residue and high-temperature particles into the treatment pool. Check whether the first gravity air-closing valve 30 is closed normally. Clean the external explosion relief pipe 24 and the gas pipe 25. Check whether the pressure explosion-proof diaphragm 93 is ruptured; if damaged, replace it with a new diaphragm of the same specification. Check whether the second gravity air-closing valve 91 has fully returned to its original position. After confirming that there are no abnormalities, reinstall all components of the explosion-proof device 100, open the water supply valve 50 and drain valve 60, and restore the water level for normal operation.

[0085] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-phase water self-sealing multi-pivot joint explosion-proof device, characterized in that, include: An explosion-proof enclosure, the explosion-proof enclosure being suitable for containing water, the explosion-proof enclosure being a cylindrical structure; The connecting pipeline includes: an airflow channel and a first opening and a second opening communicating with the airflow channel, the first opening being adapted to communicate with an explosive fluid, the second opening communicating with the explosion-proof housing, and the second opening being located below the liquid surface of the water; The first gravity air-closing valve and the first air-closing device gravity hammer, wherein the first gravity air-closing valve has a first state and a second state. In the first state, the first gravity air-closing valve can close under the gravity of the first air-closing device gravity hammer to disconnect the first opening from the second opening. In the second state, the first gravity air-closing valve can open under the action of the gas explosion airflow to connect the first opening with the second opening.

2. The multi-phase water self-sealing multi-pivot joint explosion-proof device according to claim 1, characterized in that, The connecting pipeline includes: An external explosion relief pipe is provided, wherein the external explosion relief pipe has the first opening and a first flow channel communicating with the first opening; An air duct has a second opening and a second flow channel communicating with the second opening; the second flow channel communicates with the first flow channel, and the first flow channel and the second flow channel constitute at least part of the airflow channel, and the first gravity air-closing valve is disposed on the first flow channel.

3. The multiphase water self-sealing multi-hub explosion-proof device according to claim 1 or 2, characterized in that, The height H from the second opening to the water surface satisfies: 10cm≤H≤50cm.

4. The multiphase water self-sealing multi-hub explosion-proof device according to claim 1 or 2, characterized in that, Also includes: The water supply valve is connected to the external water source and the explosion-proof housing via the first pipeline; A drain valve, connected to the explosion-proof housing via a second pipe, is suitable for draining water from inside the explosion-proof housing to the outside.

5. The multiphase water self-sealing multi-hub explosion-proof device according to claim 4, characterized in that, Also includes: A water level gauge is installed inside the explosion-proof housing to detect the water level inside the explosion-proof housing.

6. The multiphase water self-sealing multi-hub explosion-proof device according to claim 1 or 2, characterized in that, The explosion-proof housing has a receiving cavity inside, and the explosion-proof housing has an opening communicating with the receiving cavity. The receiving cavity is suitable for containing water. The multiphase water self-sealing multi-hub explosion-proof device also includes: The first anti-overflow structure is connected to the opening; The second anti-overflow structure is connected to the opening and is located above the first anti-overflow structure.

7. The multiphase water self-sealing multi-hub explosion-proof device according to claim 6, characterized in that, The first anti-overflow structure includes a flat plate structure with multiple mesh holes; the second anti-overflow structure includes a lower cover, the lower cover being at least partially inverted conical in shape, and the lower cover having multiple mesh holes.

8. The multiphase water self-sealing multi-hub explosion-proof device according to claim 7, characterized in that, The multiphase water self-sealing multi-hub explosion-proof device further includes: an upper cover, which is disposed at the opening and covers the upper cover above the lower cover. The upper cover is movably connected to the explosion-proof housing and is adapted to open the upper cover when subjected to impact.

9. The multiphase water self-sealing multi-hub explosion-proof device according to claim 6, characterized in that, The height M of the first anti-overflow structure from the water surface satisfies: M≥10cm, and the height N of the second anti-overflow structure from the water surface satisfies: N≥10cm.

10. The multiphase water self-sealing multi-hub explosion-proof device according to claim 2, characterized in that, The external explosion relief pipe is also provided with a pressure relief port that communicates with the first flow channel; The multiphase water self-sealing multi-hub explosion-proof device also includes: The second gravity air-closing valve and the second air-closing device gravity hammer are provided at the pressure relief port. The second gravity air-closing valve is adapted to block the pressure relief port under the action of the second air-closing device gravity hammer and to open the pressure relief port under the action of the gas explosion airflow in the first flow channel.

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