Water mist explosion prevention and suppression device in limited space

Abstract

The invention relates to the technical field of anti-explosion protection, and discloses a water mist explosion prevention and suppression device in a limited space, and an atomizer is arranged at the bottom of a mist storage cavity of a mist storage box. The multiple spraying mechanisms are sequentially arranged outside the mist storage box in the vertical direction and located above the atomizer, the spraying mechanisms communicate with the mist storage cavity and are used for spraying water mist to the limited space, and the spraying mechanisms can swing relative to the mist storage box. The water mist recycling mechanism is arranged in the mist storage cavity and located above the atomizer, and drainage is conducted to the atomizer through the backflow inclined face. The spraying mechanism and the atomizer are electrically connected with the central controller, the atomizer is controlled to spray water mist to the limited space in a small flux mode when the concentration of explosive gas in the limited space is smaller than the preset concentration, and the atomizer is controlled to spray water mist to the limited space in a small flux mode when the concentration of explosive gas in the limited space is larger than or equal to the preset concentration. The atomizer is controlled to spray water mist into the limited space in a large-flux mode, the water mist concentration in the limited space is obtained, and the pitching frequency of the spraying mechanism is adjusted according to the water mist concentration.

Description

Technical Field

[0001] This invention belongs to the field of explosion-proof protection technology, and specifically relates to a water mist explosion-proof and explosion-suppressing device for confined spaces. Background Technology

[0002] Water mist primarily extinguishes flames through heat absorption and cooling, asphyxiation, and oxygen deprivation. Water mist fire suppression systems also offer advantages such as low water consumption and environmental friendliness. In confined spaces, gas leaks, fires, and explosions spread much more rapidly than in open areas. Therefore, timely responses to confined space conditions are crucial, and water mist spraying can mitigate the risk of fires and explosions. However, current technologies for targeted water mist spraying in confined spaces are not very effective and suffer from low water mist utilization rates. Summary of the Invention

[0003] The purpose of this invention is to provide a water mist explosion suppression device for confined spaces, which can spray water mist in a targeted manner for explosive gases of different concentrations and improves the utilization rate of water mist.

[0004] To achieve the above objectives, the present invention provides a water mist explosion-proof and explosion-suppressing device for confined spaces, the water mist explosion-proof and explosion-suppressing device for confined spaces comprising:

[0005] Fog collector;

[0006] The atomizer is located inside the mist storage chamber of the mist storage box and at the bottom of the mist storage chamber;

[0007] The spraying mechanism consists of multiple spraying mechanisms arranged vertically outside the mist storage box and above the atomizer. The spraying mechanism is connected to the mist storage chamber and is used to spray water mist into the confined space. The spraying mechanism can swing relative to the mist storage box.

[0008] A water mist recovery mechanism is vertically positioned within the mist storage chamber and above the atomizer, and the water mist recovery mechanism is equipped with a return slope for guiding water flow back to the atomizer; and

[0009] The central controller, spraying mechanism, and atomizer are all electrically connected to the central controller, which is configured as follows:

[0010] When the concentration of explosive gas in a confined space is less than the preset concentration, control the atomizer to spray water mist into the confined space in a small flow rate.

[0011] When the concentration of explosive gas in a confined space is greater than or equal to a preset concentration, control the atomizer to spray water mist into the confined space in a large flow rate.

[0012] Obtain the water mist concentration within the confined space, and adjust the oscillation frequency of the spraying mechanism according to the water mist concentration.

[0013] In an embodiment of the present invention, the spraying mechanism includes:

[0014] The nozzle is connected to the mist storage chamber;

[0015] The adjustment assembly includes a drive rod and a drive element for driving the drive rod. The length direction of the drive rod is aligned with the length direction of the nozzle. The drive element is electrically connected to a central controller, which is configured as follows:

[0016] The driving power of the drive unit is adjusted according to the water mist concentration in the confined space.

[0017] In an embodiment of the present invention, the nozzle includes:

[0018] The rigid section is connected to the mist storage chamber and is provided with a rigid mounting surface for mounting the drive components;

[0019] Flexible segment; and

[0020] The two ends of the swing section and the flexible section are respectively connected to the rigid section and the swing section. The drive rod passes through the flexible section from the rigid section and extends to the swing section. The drive rod is used to drive the swing section to swing under the drive of the drive component. The flexible section can deform under the squeezing and pulling action of the swing section.

[0021] In embodiments of the present invention, the spraying mechanism further includes:

[0022] The driving gear is connected to the driving component; the driving gear is a half gear.

[0023] The driven gear is connected to the driving gear in a transmission manner. The driven gear is a full gear. The driving component is used to drive the driven gear to rotate in a first direction via the driving gear, causing the driving rod to move upward; and

[0024] The reverse adjustment component is mounted on the driven gear. The driven gear, which rotates in the first direction, can elastically compress the reverse adjustment component. The reverse adjustment component is used to apply a reverse rotational force to the driven gear, causing the driven gear to rotate in the second direction and drive the drive rod to move downward. The first direction and the second direction are opposite.

[0025] In an embodiment of the present invention, a spraying chamber is formed in the nozzle, and the adjustment assembly further includes a rotating member fixedly connected to the drive gear. The rotating member is disposed in the spraying chamber and is used to drive the drive gear to switch between a meshing state and a free state.

[0026] In an embodiment of the present invention, the water mist recovery mechanism includes:

[0027] First liquid guide plate;

[0028] The second liquid guide plate, the first liquid guide plate and the second liquid guide plate are arranged opposite to each other and are both inclined downward from the direction of the mist storage box toward the atomizer. There are multiple first liquid guide plates and second liquid guide plates, which are arranged at intervals along the height direction of the mist storage box.

[0029] A second liquid guide plate is provided between any two adjacent first liquid guide plates along the height direction of the mist storage box, and the free ends of the first liquid guide plate and the second liquid guide plate away from the mist storage box are located on the same straight line.

[0030] In an embodiment of the present invention, the water mist recovery mechanism further includes a liquid guiding column disposed in the mist storage chamber. The liquid guiding column extends along the height direction of the mist storage chamber. At least one of the first liquid guiding plate and the second liquid guiding plate is connected to the liquid guiding column. The liquid guiding column is located above the atomizer and the free end of the liquid guiding column faces the atomizer.

[0031] In an embodiment of the present invention, the spraying mechanism includes a mist delivery pipe, a nozzle, and a spray nozzle. One end of the mist delivery pipe is connected to a swing section, and the other end is connected to the nozzle. The mist delivery pipe is connected to the spraying chamber. Multiple nozzles are connected to the nozzle, and multiple guide vanes are provided in the nozzles.

[0032] In an embodiment of the present invention, the spraying mechanism further includes an air exchange component disposed inside the mist delivery pipe. The outer diameter of the air exchange component is the same as the inner diameter of the mist delivery pipe. Along the height direction of the mist storage box, the outer diameters of the multiple spray pipes are gradually reduced from top to bottom.

[0033] In an embodiment of the present invention, the mist delivery pipe includes a first spray section and a second spray section. A groove is formed at the end of the first spray section away from the mist storage box, and the second spray section is rotatably connected to the first spray section through the groove.

[0034] In an embodiment of the present invention, the water mist explosion-proof and explosion-suppressing device in the confined space further includes a water mist recovery pipe and an air pump. One end of the water mist recovery pipe is connected to the mist storage chamber, and the other end is connected to the confined space. The air pump is connected to the water mist recovery pipe and is used to extract water mist in the confined space and transport the water mist to the mist storage box.

[0035] Through the above technical solutions, the water mist explosion-proof and explosion-suppressing device for confined spaces provided by the embodiments of the present invention has the following beneficial effects:

[0036] The water mist explosion-proof and explosion-suppressing device for confined spaces in this invention includes a mist storage box, an atomizer, a spraying mechanism, a water mist recovery mechanism, and a central controller. The atomizer is located inside the storage cavity of the storage box and positioned at the bottom of the storage box. Multiple spraying mechanisms are vertically arranged outside the mist storage box, with their positions higher than the atomizer. The spraying mechanisms are connected to the storage cavity for spraying water mist into the confined space. The spraying mechanisms are connected to the central controller, which controls the oscillation frequency of the spraying mechanisms based on the concentration of explosive gas in the confined space. When the explosive gas concentration is lower than a preset concentration, the spraying mechanism oscillates at a first frequency; when the explosive gas concentration is equal to or greater than the preset concentration, it oscillates at a second frequency. The first frequency is less than the second frequency, allowing the water mist to be evenly sprayed and diffused within the confined space, and achieving different effects in suppressing the concentration of explosive gas through different oscillation frequencies. Furthermore, the water mist recovery mechanism intercepts large water mist particles via a reflux ramp, causing these particles to coalesce into atomized liquid and flow back to the atomizer for further atomization. This improves the utilization efficiency of the atomized liquid and effectively limits the size of the water mist sprayed into the confined space, ensuring that the water mist effectively suppresses the concentration of explosive gases within the confined space. The central controller is electrically connected to both the spraying mechanism and the atomizer. It can acquire the water mist concentration within the confined space and, when the explosive gas concentration is lower than a preset concentration, control the atomizer to spray a small volume of water mist into the confined space for cooling and oxygen-blocking. When the explosive gas concentration is greater than or equal to the preset concentration, control the atomizer to spray a large volume of water mist into the confined space, allowing the water mist to quickly cover the space and effectively dilute the explosive gas concentration, reducing the risk of combustion and explosion within the confined space.

[0037] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of the water mist explosion-proof and explosion-suppressing device according to the present invention;

[0040] Figure 2 This is a schematic diagram of the spraying mechanism from one perspective according to an embodiment of the present invention;

[0041] Figure 3This is a schematic diagram of the spraying mechanism from another perspective according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the spraying mechanism according to another embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures

[0044] 1 Atomizer 35 Reverse Adjustment Component

[0045] 2. Fog collection box 36. Support rod

[0046] 21. Mist storage chamber; 37. Mist delivery pipe

[0047] 3 Spraying Mechanism 371 First Spray Section

[0048] 31 Nozzle 372 Second Injection Section

[0049] 311 Rigid Section 38 Nozzle

[0050] 312 Flexible section 39 Nozzle

[0051] 313 Swing section 391 Guide vane

[0052] 314 Spraying chamber 4 Water mist recovery mechanism

[0053] 321 Drive rod 41 First guide plate

[0054] 322 Rotating component 42 Second guide plate

[0055] 33 Drive gear 43 Fluid guide column

[0056] 34 Driven gear Detailed Implementation

[0057] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0058] The water mist explosion suppression device for confined spaces according to the present invention is described below with reference to the accompanying drawings.

[0059] like Figure 1 and Figure 2As shown, this invention proposes a water mist explosion-proof and explosion-suppressing device for confined spaces. The device includes an atomizer 1, a mist storage box 2, spraying mechanisms 3, a water mist recovery mechanism 4, and a central controller. The atomizer 1 is located inside the mist storage chamber 21 of the mist storage box 2 and at the bottom of the chamber 21. Multiple spraying mechanisms 3 are arranged vertically outside the mist storage box 2 and above the atomizer 1. The spraying mechanisms 3 are connected to the mist storage chamber 21 and are used to spray water mist into the confined space. The spraying mechanisms 3 can swing relative to the mist storage box 2. The water mist recovery mechanism 4 is arranged vertically inside the mist storage chamber 21 and above the atomizer 1, and has a return slope for guiding water mist back to the atomizer 1. Both the spraying mechanism 3 and the atomizer 1 are electrically connected to the central controller. The central controller is configured to control the atomizer 1 to spray water mist at a low flow rate into the confined space when the concentration of explosive gas in the confined space is less than a preset concentration, and to control the atomizer 1 to spray water mist at a high flow rate into the confined space when the concentration of explosive gas in the confined space is greater than or equal to the preset concentration. The central controller obtains the water mist concentration within the confined space and adjusts the oscillation frequency of the spraying mechanism 3 according to the water mist concentration. The atomizer 1 includes an atomizing box for holding the atomizing liquid and multiple atomizing plates disposed within the atomizing box. The atomizing plates are electrically connected to the central controller. The water mist explosion-proof device in the confined space also includes a gas sensor connected to the central controller. The gas sensor measures the explosive gas concentration and water mist concentration information and feeds it back to the central controller.

[0060] The water mist explosion-proof device for confined spaces in this invention includes a mist storage box 2, an atomizer 1, a spraying mechanism 3, a water mist recovery mechanism 4, and a central controller. The atomizer 1 is located inside the storage cavity of the storage box and positioned at the bottom of the storage box. Multiple spraying mechanisms 3 are vertically arranged outside the mist storage box 2, with the spraying mechanism 3 positioned higher than the atomizer 1. The spraying mechanism 3 communicates with the storage cavity to spray water mist into the confined space. The spraying mechanism 3 is connected to the central controller, which controls the oscillation frequency of the spraying mechanism 3 according to the concentration of explosive gas in the confined space. When the explosive gas concentration is lower than a preset concentration, it oscillates at a first frequency; when the explosive gas concentration is equal to or greater than the preset concentration, it oscillates at a second frequency. The first frequency is less than the second frequency, allowing the water mist to be evenly sprayed and diffused within the confined space by the spraying mechanism 3, and achieving different effects in suppressing the concentration of explosive gas through different oscillation frequencies. Furthermore, the water mist recovery mechanism 4 intercepts large water mist particles via a reflux slope, causing these particles to converge and form an atomized liquid. This liquid then flows back to the atomizer 1 via the reflux slope, where it is atomized again. This improves the utilization efficiency of the atomized liquid and effectively limits the size of the water mist sprayed into the confined space, ensuring that the water mist effectively suppresses the concentration of explosive gases within the confined space. The central controller is electrically connected to both the spraying mechanism 3 and the atomizer 1. The central controller can obtain the water mist concentration within the confined space. When the explosive gas concentration in the confined space is less than a preset concentration, it controls the atomizer 1 to spray a small volume of water mist into the confined space, achieving cooling and oxygen-blocking effects. When the explosive gas concentration in the confined space is greater than or equal to the preset concentration, it controls the atomizer 1 to spray a large volume of water mist into the confined space, allowing the water mist to quickly cover the confined space and effectively dilute the explosive gas concentration, reducing the risk of combustion and explosion within the confined space.

[0061] The confined space water mist explosion-proof device also includes a ignition source detector connected to the central controller. The ignition source detector detects high-risk ignition sources and feeds this information back to the central controller. Based on this information, the spraying mechanism 3 can employ a zoned explosion-proof spraying method. Multiple spraying mechanisms 3 use different water mist fluxes. The central controller drives the spraying mechanism 3 covering high-risk ignition sources to spray a large-flux of water mist to suppress explosions, while other locations are sprayed with a small-flux of water mist. Directional spraying of a large-flux of water mist effectively isolates ignition sources, preventing leaked gas from exploding upon contact with an ignition source, thus reducing the risk of explosions within the confined space. It should be noted that if the confined space water mist explosion-proof device is used in personnel safety passages, a large-flux of water mist should be prioritized to ensure the safety passage is free from explosion risks or to prevent secondary explosions after an initial explosion. The amount of water mist sprayed (small or large flux) can be determined by the central controller controlling the number of atomizing plates opened by the atomizer 1. If a water mist explosion-proof device for confined spaces is used inside a container to protect energy storage components, preventative spraying—spraying a small volume of water mist—is performed during normal operation of the energy storage components to cool them down and isolate them from oxygen. When a gas sensor detects a leak of explosive gas from the energy storage components, isolation spraying is employed. Atomizer 1 prepares a large volume of water mist, which is then sprayed through spraying mechanism 3 to dilute the concentration of the leaked explosive gas. The average particle size of the water mist is less than 10 μm, and it is produced by ultrasonic atomization using atomizer 1.

[0062] Preferably, additives such as potassium salts, sodium salts, and other metal salts, as well as surfactants, can be added to the atomizing liquid used for atomization. This increases the number of free ions in the water mist produced by the atomizer 1, which can further reduce the size of the water mist particles and allow the ions in the water mist to react further with the ions generated by the flame combustion. This reduces the number of free radicals in the chemical reaction. With the number of free radicals reduced, the combustion reaction cannot be maintained, thus weakening or terminating the combustion reaction intensity.

[0063] like Figure 2As shown, in one embodiment, the spraying mechanism 3 is capable of pitching and swinging. The spraying mechanism 3 includes a spray pipe 31 and an adjustment assembly. The spray pipe 31 is connected to the mist storage chamber 21. The adjustment assembly includes a drive rod 321 and a drive member for driving the drive rod 321. The length direction of the drive rod 321 is consistent with the length direction of the spray pipe 31. The drive member is electrically connected to the central controller. The central controller is configured to adjust the driving power of the drive member according to the water mist concentration in the confined space. When the gas sensor detects that the concentration of explosive gas in the confined space is less than the preset concentration, the central controller can drive the drive member to work at the first driving power. At this time, a small flow rate of water mist is sprayed to cool down, isolate oxygen and suffocate, and ensure that the water mist is fully diffused in the confined space. When the gas sensor detects that the concentration of explosive gas in the confined space is greater than or equal to a preset concentration, the central controller drives the drive unit to operate at the second drive power. This increases the oscillation frequency of the drive rod 321 and generates a large flow of water mist, rapidly covering the confined space, diluting the concentration of explosive gas, and reducing the risk of combustion and explosion. When the central controller drives the atomizer 1 to produce water mist, the drive unit is simultaneously activated, causing the drive rod 321 to oscillate, improving the spraying effect and making the water mist spray more uniform. The drive unit can be a drive motor as used in existing technologies.

[0064] Preferably, in another embodiment, the spraying mechanism 3 can swing horizontally, and the sprayed water mist gradually settles in the confined space under the action of gravity, and can efficiently cover the protected area, reducing the risk of combustion and explosion in the protected area.

[0065] In one embodiment, both the drive rod 321 and the drive component are disposed inside the nozzle 31 and can be adjusted to be proportionally reduced to minimize the space occupied by the drive rod 321 and the drive component in the nozzle 31. This avoids the drive rod 321 and the drive component being easily damaged by impact or interfered with other equipment due to being disposed outside the nozzle 31, thus affecting the continuous pitching motion of the spraying mechanism 3 and consequently the water mist spraying effect within the confined space. In another embodiment, both the drive rod 321 and the drive component are disposed outside the nozzle 31. Water mist can easily adhere to the drive rod 321 and the drive component disposed inside the nozzle 31, easily causing damage to the parts and reducing the amount of water mist output, which can easily affect the water mist spraying effect. In yet another embodiment, the drive component is disposed outside the nozzle 31 to avoid occupying the space inside the nozzle 31, while the drive rod 321 is disposed inside the nozzle 31. It can be connected to the swing section 313 to improve the swinging effect, or the swing section 313 can be moved by the swing of the drive rod 321 alone.

[0066] like Figure 2As shown, in one embodiment, the nozzle 31 includes a rigid section 311, a flexible section 312, and a swing section 313. The rigid section 311 is connected to the mist storage chamber 21 and is provided with a rigid mounting surface for mounting the drive component. The two ends of the flexible section 312 are respectively connected to the rigid section 311 and the swing section 313. The drive rod 321 passes through the flexible section 312 from the rigid section 311 and extends to the swing section 313. The drive rod 321 is used to drive the swing section 313 to pitch under the drive of the drive component. The flexible section 312 can deform under the squeezing and pulling action of the swing section 313. The rigid section 311 can be made of metal pipe, which has high structural strength and is not easily deformed. The flexible section 312 is made of flexible material pipe, which has good deformation capacity to ensure that the swing section 313 can swing flexibly relative to the rigid section 311, so that the water mist can be fully sprayed in the confined space. The swing section 313 can be made of plastic pipe, which is lightweight, easy to pitch and swing, and has low maintenance costs.

[0067] like Figure 3As shown, in another embodiment, the driving gear 33 and the driven gear 34 are supported and fixed outside the nozzle 31 by a support rod 36. The drive rod 321 is also disposed outside the nozzle 31 and connected to the swing section 313. The spraying mechanism 3 also includes a driving gear 33, a driven gear 34, and a reverse adjustment member 35. The driving gear 33 is connected to the drive member and is a half gear. The driven gear 34 is connected to the driving gear 33 and is a full gear. The drive member is used to drive the driven gear 34 to rotate in a first direction through the driving gear 33, causing the drive rod 321 to move upward. The reverse adjustment member 35 is mounted on the driven gear 34. The driven gear 34 rotating in the first direction can elastically compress the reverse adjustment member 35. The reverse adjustment member 35 is used to apply a reverse rotational force to the driven gear 34, causing the driven gear 34 to rotate in a second direction and drive the drive rod 321 to move downward. The first direction and the second direction are opposite. The pitching of the swing segment 313 is driven by the drive rod 321, which is fixedly connected to the driving gear 33. Due to the meshing of the full gear and the half gear, the circular motion of the driven gear 34 is driven by the circular motion of the driving gear 33, further driving the drive rod 321 to swing, ultimately achieving the pitching of the swing segment 313. Because the driving gear 33 only has half a circle of teeth, when the toothless half-circle rotates to the driven gear 34 side, the driving gear 33 will disengage from the driven gear 34's meshing transmission. A reverse adjustment member 35 is provided above the full gear. At this time, the reverse adjustment member 35 applies a reverse rotational force to the driven gear 34, causing the half gear to rotate in the second direction under the action of the reverse adjustment member 35, and driving the drive rod 321 to move downwards, so that the swing segment 313 returns to its initial position. As the half-gear continues to rotate, when the toothed semicircle rotates to the driven gear 34, the driven gear 34 is engaged and continues to rotate in the first direction, repeating this cycle to achieve the pitching oscillation of the swing segment 313. In this embodiment, the first direction is counterclockwise oscillation, and the second direction is clockwise oscillation. The rotation directions of the first and second directions can be set according to actual needs.

[0068] like Figure 2 and Figure 3As shown, in another embodiment, a spray chamber 314 is formed in the nozzle 31. The adjustment assembly also includes a rotating member 322 fixedly connected to the drive gear 33. The rotating member 322 is disposed in the spray chamber 314 and is used to drive the drive gear 33 to switch between an engaged state and a free state. When the propeller is subjected to airflow inside the pipe, it will generate rotational motion, thereby driving the drive gear 33 to perform circular motion. When the drive gear 33 and the driven gear 34 are in the engaged state, the drive gear 33 can drive the driven gear 34 to rotate and adjust, thereby driving the drive rod 321 connected to the driven gear 34 to move from a first swing position to a second swing position. When the drive gear 33 is in the free state, under the action of the reverse adjustment member 35 applying a reverse rotational force to the driven gear 34, the drive rod 321 moves from the second swing position to the first swing position. Because the drive gear 33 is fixedly connected to the rotating member 322, the adjustment assembly can more sensitively sense the flow of water mist and adjust the swing frequency of the drive rod 321. Furthermore, at this point, the airflow can be used to drive the rotating component 322 to swing the drive rod 321, or the drive component can be used to assist in rotating the propeller, thereby increasing the swing frequency of the drive rod 321 and improving the spraying efficiency of the water mist. The specific driving method can be selected based on the concentration of explosive gas or water mist in the confined space measured by the gas sensor. The rotating component 322 uses a propeller as used in existing technology. The first swing position and the second swing position are affected by the rotation direction of the drive gear 33. The first swing position can be either the drive rod 321 tilting upwards or downwards, and the second swing position is similar.

[0069] like Figure 1 As shown, the water mist recovery mechanism 4 includes a first liquid guide plate 41 and a second liquid guide plate 42. The first liquid guide plate 41 and the second liquid guide plate 42 are arranged opposite to each other and are both inclined downwards from the mist storage box 2 toward the atomizer 1. There are multiple first liquid guide plates 41 and second liquid guide plates 42, which are spaced apart along the height direction of the mist storage box 2. Among them, a second liquid guide plate 42 is arranged between any two adjacent first liquid guide plates 41 along the height direction of the mist storage box 2, and the free ends of the first liquid guide plates 41 and the second liquid guide plates 42 are located on the same straight line. The second liquid guide plate 42 is provided corresponding to the nozzle 31, and a second liquid guide plate 42 is provided at the lower edge of each nozzle 31. This can improve the collection and return efficiency of water mist by the second liquid guide plate 42. The first liquid guide plate 41 is located at the top of the mist storage box 2. A second liquid guide plate 42 is provided below each first liquid guide plate 41. The first liquid guide plate 41 located above can guide the water mist on the opposite side of the nozzle 31 and improve the structural compactness of the first liquid guide plate 41, the second liquid guide plate 42 and the nozzle 31.

[0070] The first liquid guide plate 41 is set in Figure 1 On the left side of the central mist storage box 2, the second liquid guide plate 42 is located... Figure 1 Right side of the central mist storage box 2. During the process of water mist self-spraying mechanism 3 spraying into the confined space, large-diameter water mist droplets prepared by ultrasonic atomization will be discharged along with it. However, the explosion suppression effect of large-diameter water mist droplets is generally poor, and the large-diameter water mist droplets evaporate slowly, which can easily damage electronic equipment. Therefore, it is necessary to filter out the large-diameter water mist droplets. In the embodiments of the present invention, a first liquid guiding plate 41 and a second liquid guiding plate 42 are provided. Due to the poor fluidity of large-diameter water mist, it will be intercepted by the first liquid guiding plate 41 and the second liquid guiding plate 42 and adhere to the first liquid guiding plate 41 or the second liquid guiding plate 42 during its flow to the spraying mechanism 3. It will also accumulate at the bottom of the first liquid guiding plate 41 or the second liquid guiding plate 42 and gradually form atomized liquid. When the atomized liquid accumulates to a certain amount, it will slide down along the first liquid guiding plate 41 or the second liquid guiding plate 42. The free ends of the first liquid guiding plate 41 and the second liquid guiding plate 42 away from the mist storage box 2 are located on the same straight line. The atomized liquid of the first liquid guiding plate 41 will flow to the second liquid guiding plate 42 below, and then flow to the first liquid guiding plate 41 below, and so on until it finally flows to the atomizer 1.

[0071] In this embodiment, the water mist recovery mechanism 4 further includes a liquid guiding column 43 disposed in the mist storage chamber 21. The liquid guiding column 43 extends along the height direction of the mist storage box 2. At least one of the first liquid guiding plate 41 and the second liquid guiding plate 42 is connected to the liquid guiding column 43. The liquid guiding column 43 is located above the atomizer 1, and the free end of the liquid guiding column 43 faces the atomizer 1. Preferably, the mist storage chamber 21 and the spraying chamber 314 are connected and form a mist outlet. There are multiple second liquid guiding plates 42, which are correspondingly disposed below the mist outlet to ensure that the atomized liquid collected at the spraying mechanism 3 can also flow back to the atomizer 1 under the guidance of the second liquid guiding plates 42. By using at least one of the first liquid guiding plate 41 and the second liquid guiding plate 42 as a liquid guiding column 43, the atomizing liquid flows towards the atomizing box at the bottom of the mist storage box 2 under the guidance of the liquid guiding column 43. This prevents the spraying mechanism 3 from spraying large-diameter water mist into the confined space. Furthermore, by positioning the bottom of the liquid guiding column 43 close to the atomizing box, the atomizing liquid flowing from the liquid guiding column 43 does not easily disturb the water surface in the atomizing box, thus not affecting the atomization efficiency of the atomizer 1. Further, the liquid guiding column 43 can be completely inserted below the water level in the atomizing box, so that the atomizing liquid flowing down from the liquid guiding column 43 also does not easily cause significant fluctuations in the water level of the atomizing box. It should be noted that a water level monitor is also installed inside the atomizing box. The water level monitor is electrically connected to the central controller and monitors the water level changes of the atomizing liquid in the atomizing box in real time, replenishing the atomizing liquid in the atomizing box in a timely manner to ensure stable water mist production.

[0072] It should be noted that the mist storage box 2 can be placed on the ground in the confined space, as long as the spraying mechanism 3 is set higher than the protected area to ensure that the spraying mechanism 3 can spray water mist to fully cover the protected area. Furthermore, the mist storage box 2 can also be adjusted according to the height of the protected area. When the protected area is located in the middle or at the top of the confined space, the mist storage box 2 needs to be adjusted appropriately to match the height of the protected area. The bottom of the mist storage box 2 can be slightly lower than the bottom of the protected area, but it is necessary to ensure that the spraying mechanism 3 is higher than the protected area to ensure that the spraying mechanism 3 can spray water mist to fully cover the protected area. This adaptive adjustment can meet the needs of the spraying mechanism 3 for protected areas at different heights, while also ensuring that the spraying mechanism 3 can cover the protected area vertically. Of course, multiple mist storage boxes 2 can also be set up around the protected area, so that the spraying mechanism 3 in different directions can spray a large amount of water mist in the middle of the protected area. After the water mist falls, it will have a certain diffusion process. After diffusion, it will surround the protected area and form a water mist curtain to protect the protected area and effectively reduce the shock wave of the explosion.

[0073] like Figure 4 As shown, in another embodiment, the spraying mechanism 3 includes a mist delivery pipe 37, a nozzle 38, and nozzles 39. One end of the mist delivery pipe 37 is connected to a swing section 313, and the other end is connected to the nozzle 38. The mist delivery pipe 37 communicates with the spraying chamber 314. Multiple nozzles 39 are connected to the nozzle 38. Preferably, the multiple nozzles 39 extend outward from the nozzle 38, and adjacent nozzles 39 are spaced apart. In one embodiment, there are four nozzles 39. One nozzle 39 is located on the center line of the nozzle 38, and the other three nozzles 39 are arranged in a circumferential array around the nozzle 38. The arrayed nozzles 39 have a certain angle along the circumference, which can improve the water mist spraying effect and make the water mist spraying more uniform. Multiple guide vanes 391 are provided in the nozzle 39. The guide vanes 391 are spirally arranged around the inner wall of the nozzle 39, which can disperse the water mist to a greater distance, thereby achieving the purpose of expanding the water mist spraying distance and coverage area. The mist delivery pipe 37 can also be connected to the swing section 313, which can also improve the water mist spraying effect.

[0074] In another embodiment, the spraying mechanism further includes a ventilation component disposed within the mist delivery pipe 37. The outer diameter of the ventilation component is the same as the inner diameter of the mist delivery pipe 37. Along the height direction of the mist storage box 2, the outer diameters of the multiple spray pipes 31 gradually decrease from top to bottom to achieve a uniform distribution of water mist spraying. Although the small diameter of the mist outlet at the bottom of the mist storage box 2 reduces the amount of mist output, the water mist discharged from the mist outlet at the top of the mist storage box 2 gradually settles downwards. The combined effect of these two factors results in a relatively uniform water mist concentration. To achieve a stepped distribution of water mist spraying, different mist outlet diameters can be set as needed. For example, if the leakage point is located in the middle of the space, the water mist will sink due to gravity, requiring a larger water mist output to effectively suppress the explosion. In this case, a large-diameter mist outlet can be set at the location of the leakage point in the mist storage box 2 to meet the cooling and explosion suppression requirements of the leakage point. The ventilation component uses a ventilation fan as described in the prior art.

[0075] like Figure 4 As shown, in another embodiment, the mist delivery pipe 37 includes a first spray section 371 and a second spray section 372. The cross-sectional dimension of the second spray section 372 is smaller than that of the first spray section 371, compressing the water mist storage space and effectively increasing the initial spray velocity and coverage area of ​​the water mist. A groove is formed at the end of the first spray section 371 away from the mist storage box 2. The second spray section 372 is rotatably connected to the first spray section 371 through the groove. The second spray section 372 is fixedly connected to the nozzle 39. When spraying water mist, the nozzle 39 can rotate while spraying water mist, thereby effectively increasing the spray range and ensuring the water mist is fully diffused within the confined space. In another embodiment, the cross-sectional dimension of the second spray section 372 is larger than that of the first spray section 371. The dimensions of the first spray section 371 and the second spray section 372 can be set according to actual needs. The spraying mechanism 3 also includes a fan installed in the first spraying section 371. The fan is connected to a drive motor and is used to adjust the fan speed according to the water mist concentration in order to improve the spraying efficiency of the water mist.

[0076] In this embodiment, the water mist explosion-proof and explosion-suppressing device in the confined space also includes a water mist recovery pipe and an air pump. The air pump is electrically connected to the central controller. One end of the water mist recovery pipe is connected to the mist storage chamber 21, and the other end is connected to the confined space. The air pump is connected to the water mist recovery pipe and is used to extract water mist from the confined space and transport the water mist to the mist storage box 2. The water mist recovery pipe is used to draw water mist that has settled to the bottom of the confined space into the mist storage box 2. This portion of water mist will be intercepted and filtered by the first liquid guide plate 41 and the second liquid guide plate 42, and then reapplied to the confined space along with newly generated water mist, realizing the circulation of water mist and further improving the utilization efficiency of water mist.

[0077] It should be noted that if the load-bearing capacity of the walls within the confined space is weak and cannot withstand the impact force of a flammable gas explosion, by analyzing and calculating the attenuation rate of the explosion shock wave by water mist, if the walls of the confined space still cannot withstand the shock wave weakened by the water mist, then a polyurea coating can be applied to the inner or outer side of the walls of the confined space, or an energy-absorbing and explosion-proof plate can be installed on the inner side of the walls of the confined space, to weaken the impact of the shock wave from the explosion on the confined space and avoid damage to the confined space structure. In the description of this invention, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A water mist explosion suppression and inhibition device in a confined space, characterized in that, The water mist explosion-proof and explosion-suppressing device in the confined space includes: Fog collector (2); Atomizer (1) is disposed in the mist storage chamber (21) of the mist storage box (2) and located at the bottom of the mist storage chamber (21); Spraying mechanism (3), a plurality of spraying mechanisms (3) are arranged in sequence along the vertical direction outside the mist storage box (2) and above the atomizer (1). The spraying mechanism (3) is connected to the mist storage chamber (21) and is used to spray water mist into the confined space. The spraying mechanism (3) can swing relative to the mist storage box (2). A water mist recovery mechanism (4) is vertically disposed within the mist storage chamber (21) and located above the atomizer (1), and the water mist recovery mechanism (4) is provided with a return slope for guiding water flow to the atomizer (1); and The central controller, the spraying mechanism (3), and the atomizer (1) are all electrically connected to the central controller, which is configured as follows: When the concentration of explosive gas in the confined space is less than the preset concentration, the atomizer (1) is controlled to spray water mist into the confined space in a small flow rate. When the concentration of explosive gas in the confined space is greater than or equal to a preset concentration, the atomizer (1) is controlled to spray water mist into the confined space in a large flow rate. Obtain the water mist concentration within the confined space, and adjust the oscillation frequency of the spraying mechanism (3) according to the water mist concentration.

2. The water mist explosion mitigation device in a confined space of claim 1, wherein, The spraying mechanism (3) includes: The nozzle (31) is connected to the mist storage chamber (21); The adjustment assembly includes a drive rod (321) and a drive member for driving the drive rod (321). The length direction of the drive rod (321) is aligned with the length direction of the nozzle (31). The drive member is electrically connected to the central controller, which is configured to: The driving power of the drive unit is adjusted according to the water mist concentration within the confined space.

3. The water mist explosion mitigation device in a confined space of claim 2, wherein, The nozzle (31) includes: The rigid section (311) is connected to the mist storage chamber (21) and is provided with a rigid mounting surface for mounting the drive component; Flexible segment (312); and The swing segment (313) has two ends of the flexible segment (312) respectively connected to the rigid segment (311) and the swing segment (313). The driving rod (321) passes through the flexible segment (312) from the rigid segment (311) and extends to the swing segment (313). The driving rod (321) is used to drive the swing segment (313) to swing under the drive of the driving member. The flexible segment (312) can deform under the squeezing and pulling action of the swing segment (313).

4. The water mist explosion mitigation device in a confined space of claim 3, wherein, The spraying mechanism (3) also includes: The drive gear (33) is connected to the drive component, and the drive gear (33) is a half gear; The driven gear (34) is connected to the driving gear (33) in a transmission manner. The driven gear (34) is a full gear. The driving member is used to drive the driven gear (34) to rotate in a first direction via the driving gear (33), causing the driving rod (321) to move upward. A reverse adjustment member (35) is installed on the driven gear (34). The driven gear (34) rotating in the first direction can elastically compress the reverse adjustment member (35). The reverse adjustment member (35) is used to apply a reverse rotational force to the driven gear (34), causing the driven gear (34) to rotate in the second direction and drive the drive rod (321) to move downward. The first direction and the second direction are opposite.

5. The water mist explosion-proof and explosion-suppressing device for confined spaces according to claim 4, characterized in that, The nozzle (31) has a spray chamber (314) formed therein. The adjustment assembly also includes a rotating member (322) fixedly connected to the drive gear (33). The rotating member (322) is disposed in the spray chamber (314) and is used to drive the drive gear (33) to switch between the meshing state and the free state.

6. The water mist explosion-proof and explosion-suppressing device for confined spaces according to any one of claims 1 to 5, characterized in that, The water mist recovery mechanism (4) includes: First liquid guide plate (41); The second liquid guide plate (42) is arranged opposite to the first liquid guide plate (41) and the second liquid guide plate (42) and both are arranged downwards from the mist storage box (2) toward the atomizer (1). There are multiple first liquid guide plates (41) and second liquid guide plates (42) and they are arranged at intervals along the height direction of the mist storage box (2). A second liquid guide plate (42) is provided between any two adjacent first liquid guide plates (41) along the height direction of the mist storage box (2), and the free ends of the first liquid guide plate (41) and the second liquid guide plate (42) away from the mist storage box (2) are located on the same straight line.

7. The water mist explosion-proof and explosion-suppressing device for confined spaces according to claim 6, characterized in that, The water mist recovery mechanism (4) further includes a liquid guide column (43) disposed in the mist storage chamber (21). The liquid guide column (43) extends along the height direction of the mist storage box (2). At least one of the first liquid guide plate (41) and the second liquid guide plate (42) is connected to the liquid guide column (43). The liquid guide column (43) is located above the atomizer (1) and the free end of the liquid guide column (43) is arranged facing the atomizer (1).

8. The water mist explosion-proof and explosion-suppressing device for confined spaces according to claim 5, characterized in that, The spraying mechanism (3) includes a mist delivery pipe (37), a nozzle (38) and a spray nozzle (39). One end of the mist delivery pipe (37) is connected to the swing section (313), and the other end is connected to the nozzle (38). The mist delivery pipe (37) is connected to the spraying chamber (314). Multiple nozzles (39) are connected to the nozzle (38), and multiple guide vanes (391) are provided in the nozzles (39).

9. The water mist explosion-proof and explosion-suppressing device for confined spaces according to claim 8, characterized in that, The spraying mechanism (3) also includes an air exchange component disposed in the mist delivery pipe (37). The outer diameter of the air exchange component is the same as the inner diameter of the mist delivery pipe (37). Along the height direction of the mist storage box (2), the outer diameters of the multiple spray pipes (31) are gradually reduced from top to bottom.

10. The water mist explosion-proof and explosion-suppressing device for confined spaces according to claim 9, characterized in that, The mist delivery pipe (37) includes a first spray section (371) and a second spray section (372). A groove is formed at one end of the first spray section (371) away from the mist storage box (2). The second spray section (372) is rotatably connected to the first spray section (371) through the groove.

11. The water mist explosion-proof and explosion-suppressing device for confined spaces according to any one of claims 1 to 5, characterized in that, The water mist explosion-proof device in the confined space also includes a water mist recovery pipe and an air pump. One end of the water mist recovery pipe is connected to the mist storage chamber (21), and the other end is connected to the confined space. The air pump is connected to the water mist recovery pipe and is used to extract water mist in the confined space and transport the water mist to the mist storage box (2).

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