Explosion venting device

Abstract

The present disclosure provides a kind of explosion venting device.The explosion venting device can include: explosion venting duct, fixed at the explosion venting opening of container, for when explosion occurs in the container, explosion flame and explosion pressure in the container are discharged;Suppression device, arranged in the explosion venting duct, for under the action of explosion pressure discharged into the explosion venting duct, release suppression material into the explosion venting duct to suppress secondary explosion in the explosion venting duct.The explosion venting device of the present disclosure can suppress secondary explosion in the explosion venting duct, effectively improve the explosion venting effect of the explosion venting duct.In addition, it also has the advantages of no external force, no potential ignition source, with intrinsic safety explosion suppression function, etc.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a kind of explosion venting device. BACKGROUND

[0002] In recent years, dust explosion accidents occur frequently, causing a large number of casualties and property losses. Explosion venting duct technology is very important in dust explosion disaster control measures. Dust explosion generally forms a high concentration of combustible dust cloud in the container. If a spark of sufficient energy is generated under this condition, an explosion will occur. The main function of the explosion venting duct is to form a weak link on the surface of the container, i.e. the explosion venting port, so that the shock wave and flame generated by the explosion are discharged from the explosion venting port and propagate along the duct, thereby making the initial explosion shock wave and high-temperature flame away from personnel, important equipment and facilities, and avoiding explosion risk.

[0003] However, when the flame is discharged into the explosion venting duct to ignite the dust cloud, a secondary explosion will occur in the explosion venting duct, and the reaction of the secondary explosion will prevent the explosion pressure and flame in the container from continuing to spread outward, thereby weakening the explosion venting effect. Therefore, effectively suppressing the occurrence of secondary explosion in the duct is the key to optimizing the explosion venting duct technology and improving the explosion venting effect of the explosion venting duct. That is, a new explosion venting duct technology is needed to effectively suppress the secondary explosion in the duct to improve the explosion venting effect of the explosion venting duct. SUMMARY

[0004] To solve at least one of the above technical problems, the present disclosure provides an explosion venting device to reduce the influence of secondary explosion on the explosion venting effect.

[0005] The first aspect of the present disclosure provides an explosion venting device, comprising:

[0006] An explosion venting duct is fixed to the explosion venting opening of the container, and is used to discharge the explosion flame and explosion pressure in the container when an explosion occurs in the container.

[0007] An explosion suppression device is arranged in the explosion venting duct, and is used to release explosion suppression material into the explosion venting duct under the action of explosion pressure discharged into the explosion venting duct, to suppress secondary explosion in the explosion venting duct.

[0008] In some embodiments, the explosion suppression device comprises explosion suppression material and a carrier portion, the explosion suppression material is placed on the carrier portion, and the carrier portion is fixedly arranged in the explosion venting duct; the carrier portion is used to move to release the explosion suppression material into the explosion venting duct under the action of explosion pressure discharged into the explosion venting duct.

[0009] In some embodiments, the carrier comprises a first sector, a second sector, a third sector and a rotating shaft, the rotating shaft is arranged along a tangential direction of the explosion venting duct, two ends of the rotating shaft are fixed on the inner wall of the explosion venting duct, the first sector, the second sector and the third sector are fixed on different sides of the rotating shaft to form a Y-shaped structure, the first sector and the second sector are symmetrically arranged relative to the rotating shaft to form a V-shaped structure in the Y-shaped structure, the opening of the V-shaped structure faces the positive axial direction of the explosion venting duct, the V-shaped structure is used for containing the explosion suppression substance, the fixed end of the third sector is fixed on the side of the rotating shaft, the extending end extends to the negative axial direction of the explosion venting duct, the third sector is located on the central axis of the V-shaped structure when there is no external force or the size of the external force is less than or equal to a predetermined threshold, so that the V-shaped structure remains balanced, the extending end of the third sector inclines to the extending direction of the explosion venting duct under the explosion pressure greater than the predetermined threshold, so as to drive the rotating shaft to rotate, the rotation of the rotating shaft makes the V-shaped structure incline, so that the explosion suppression substance is poured into the explosion venting duct.

[0010] In some embodiments, the first sector and the second sector have the same weight and the weight is less than that of the third sector.

[0011] In some embodiments, the included angle between the first sector and the third sector is the same as the included angle between the second sector and the third sector.

[0012] In some embodiments, the included angle between the first sector and the third sector or the included angle between the second sector and the third sector is 120°-150°.

[0013] In some embodiments, there is a gap between the first sector and the inner wall of the explosion venting duct, and there is a gap between the second sector and the inner wall of the explosion venting duct.

[0014] In some embodiments, the explosion suppression substance is calcium carbonate or sodium bicarbonate.

[0015] In some embodiments, the explosion venting duct has a protrusion, the protrusion is hollow, the explosion suppression device is fixed on the inner wall of the protrusion, and the explosion suppression device is at least partially contained in the cavity of the protrusion.

[0016] In some embodiments, the protrusion is provided with a pouring port, the pouring port is used for pouring the explosion suppression substance, and the explosion suppression device further comprises an opening device used for closing the pouring port.

[0017] In some embodiments, the explosion suppression device further comprises an explosion venting sheet arranged at the explosion venting opening of the container, used for opening the explosion venting opening under the action of the explosion pressure, so that the explosion venting duct communicates with the container through the explosion venting opening.

[0018] The explosion venting device provided by the present disclosure can automatically sprinkle the explosion suppression substance into the explosion venting duct by the shock wave (i.e., explosion pressure) generated by the explosion when the explosion occurs in the container, can suppress the explosion flame from entering the explosion venting duct, can prevent the unburned combustible dust from being rushed from the container into the explosion venting duct to form a dust cloud to cause a secondary explosion, and can also prevent the formation of the explosion venting reverse shock wave, so that the explosion venting effect of the explosion venting duct can be effectively improved. In addition, the explosion venting device provided by the present disclosure has the advantages of no need of external force, no potential ignition source, and intrinsic safety explosion suppression function, and can realize the high efficiency and safety of the duct explosion venting technology in current industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings illustrate exemplary embodiments of the present disclosure, together with the description, and are included in the present specification to provide further understanding of the present disclosure, and constitute a part of the present specification.

[0020] Figure 1a is a normal state schematic diagram of a container connected with an explosion venting duct in the related art.

[0021] Figure 1b is a schematic diagram of an initial dust explosion inside a container connected with an explosion venting duct before venting in the related art.

[0022] Figure 1c is a schematic diagram of unburned dust in a container diffusing into an explosion venting duct to form a dust cloud in the related art.

[0023] Figure 1d is a schematic diagram of a secondary explosion caused by an initial flame in a container igniting unburned dust in an explosion venting duct in the related art.

[0024] Figure 1e is a schematic diagram of a shock wave of a secondary explosion in an explosion venting duct acting on a container explosion venting in the related art.

[0025] Figure 2 is a structural schematic diagram of an explosion venting device according to some embodiments of the present disclosure.

[0026] Figure 3 is a structural schematic diagram of an explosion suppression device and its setting in an explosion venting duct according to some embodiments of the present disclosure.

[0027] Figure 4 is a schematic diagram of an explosion suppression device in a tangential direction of an explosion venting duct and its installation in the explosion venting duct according to some embodiments of the present disclosure.

[0028] Figure 5is a comparison diagram of experimental data of the container explosion pressure of the conventional explosion relief plate, the conventional explosion relief duct and the container explosion relief device of the present disclosure.

[0029] Reference Signs List

[0030] 100 explosion relief device

[0031] 200 container

[0032] 110 explosion relief duct

[0033] 120 explosion suppression device

[0034] 130 explosion relief plate

[0035] 150 opening device

[0036] 111 protrusion

[0037] 121 explosion suppression substance

[0038] 122 bearing part

[0039] 1221 rotating shaft

[0040] 1222 first fan blade

[0041] 1223 second fan blade

[0042] 1224 third fan blade

[0043] 1225 buckle

[0044] 141 flange

[0045] 142 bolt DETAILED DESCRIPTION

[0046] The present disclosure will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related content, and not to limit the present disclosure. In addition, it should be noted that only parts related to the present disclosure are shown in the drawings for ease of description.

[0047] It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict. The technical solutions of the present disclosure will be described in detail below with reference to the drawings and in combination with the embodiments.

[0048] Unless otherwise stated, the exemplary implementations / examples shown will be understood to provide exemplary features of various details that can be implemented in practice to embody the technological concepts of the present disclosure. Accordingly, features of the various implementations / examples can be additionally combined, separated, interchanged, and / or rearranged, unless otherwise stated, without departing from the technological concepts of the present disclosure.

[0049] The use of cross-hatching and / or shading in the drawings is generally used to make the boundaries and regions of adjacent components more clearly understood. As such, unless specifically stated otherwise, the presence of cross-hatching or shading in no way limits the scope of a component to the areas of cross-hatching or shading and is merely intended to accentuate the boundaries and regions of adjacent components. Moreover, the size and relative sizes of the components shown in the drawings can be exaggerated or otherwise not drawn to scale for the purposes of clarity and / or description. When exemplary embodiments can be practiced differently, a specific process sequence can be performed in an order other than the described sequence. For example, two sequentially described processes can be performed at substantially the same time or in the reverse order of the described sequence. Moreover, the same reference numbers are used in different drawings to represent the same or similar components.

[0050] When a component is referred to as being “on” or “over” another component, “connected to” or “coupled to” another component, it can be directly on, directly connected to, or directly coupled to the other component, or one or more intervening components can be present. However, when a component is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another component, there are no intervening components present. As such, the term “connected” can refer to a physical or electrical connection, whether or not with intervening components.

[0051] For descriptive purposes, the present disclosure can use spatial or relative terms, such as “below,” “lower,” “under,” “lessor,” “above,” “upper” “over,” “higher,” and “side” (e.g., in “sidewall”) to describe the relationship between one component and another component as the drawings suggest. The spatial or relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, a component described as “below” or “under” another component would then be oriented “above” the other component. Thus, the exemplary term “below” can encompass both an orientation of above and below. Moreover, the device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatial or relative descriptors used herein interpreted accordingly.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "comprising," "including," "containing," and / or "having" and variations thereof are used herein, such terms are intended to be inclusive, in an aspect, it is noted that the terms "substantial," "approximately," and other similar terms are used as terms of approximation and not as terms of degree, unless otherwise indicated herein. Thus, at the very least, such terminology will cover instances where unexpected experimental errors have occurred.

[0053] As described above, due to the secondary explosion caused by the explosion flame in the explosion venting duct, the reaction of the secondary explosion prevents the explosion pressure and flame in the container from continuously expanding outward, thereby affecting the explosion venting effect. Figures 1a-1e A schematic diagram of the secondary explosion process in the explosion venting duct is shown, Figures 1a-1e The black dots in the middle represent dust, and the gray filled shapes represent explosion areas, and the dark gray filled shapes represent flame fronts. As Figure 1a shown, under normal conditions, combustible dust is in the container, and the passage between the container and the explosion venting duct is closed by the explosion venting disc. As Figures 1b-1c shown, when a dust explosion occurs in the container connected with the explosion venting duct, an initial dust explosion occurs inside the container before venting, the explosion venting disc is opened, the container is connected with the explosion venting duct, and the unburned combustible dust in the container is vented to the explosion venting duct through the leading pressure wave, and the unburned dust diffuses to form a dust cloud in the duct, as Figure 1d shown, when the explosion flame enters the explosion venting duct to ignite the dust cloud, a secondary explosion occurs, as Figure 1e shown, the shock wave generated by the secondary explosion will propagate to both sides along the duct, and the shock wave propagating in the opposite direction of the explosion venting will prevent the explosion pressure and flame in the container from continuously expanding outward, thereby weakening the explosion venting effect of the explosion venting duct.

[0054] In view of this, the present disclosure provides an improved explosion venting device that can effectively suppress the influence of secondary explosion and effectively improve the explosion venting effect.

[0055] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0056] Figure 2 A structural schematic diagram of the explosion venting device 100 in some embodiments of the present disclosure is shown. As Figure 2As shown, the explosion venting device 100 may include an explosion venting conduit 110 and an explosion suppression device 120. The explosion venting conduit 110 is fixed to the explosion venting opening of the container 200 and is used to release the explosion flame and explosion pressure inside the container 200 when an explosion occurs inside the container 200. The explosion suppression device 120 is disposed inside the explosion venting conduit 110 and is used to release an explosion suppression substance 121 into the explosion venting conduit 110 under the action of the explosion pressure released into the explosion venting conduit 110, so as to suppress secondary explosions inside the explosion venting conduit 110.

[0057] like Figure 2 As shown, the explosion relief device 100 may further include an explosion relief disc 130, which is disposed at the explosion relief opening of the container 200 and is used to open the explosion relief opening under the action of explosion pressure so that the explosion relief conduit 110 can be connected to the container 200 through the explosion relief opening, thereby releasing the explosion flame and explosion pressure of the container 200 through the explosion relief conduit 110.

[0058] The explosion relief conduit 110 can be connected to the explosion relief opening of the container 200 by a fixing device. The fixing device can be, but is not limited to, various fixing connection structures applicable to the explosion relief conduit 110.

[0059] The explosion relief disc 130 can also be fixedly installed at the explosion relief opening of the container 200 by a fixing device, located between the explosion relief opening of the container 200 and the inlet of the explosion relief conduit 110.

[0060] like Figure 2 As shown, the fixing device may include a flange 141 and bolts 142. The explosion relief conduit 110 and the explosion relief disc 130 are fixedly connected to the explosion relief opening of the container 200 via the flange 141 and bolts 142. In the absence of an explosion inside the container 200, the explosion relief opening of the container 200 is closed by the explosion relief disc 130, and the container 200 is not connected to the explosion relief conduit 110. If an explosion occurs inside the container 200, the explosion relief disc 130 opens under the impact of the explosion pressure, connecting the container 200 to the explosion relief conduit 110, allowing the explosion flame and pressure inside the container 200 to be released through the explosion relief conduit 110. Thus, the explosion relief disc 130 not only seals the explosion relief opening of the container 200 but also releases the explosion pressure and / or explosion flame inside the container 200.

[0061] Container 200 may be, but is not limited to, a tank. This disclosure does not limit the material, shape and other details of container 200.

[0062] like Figure 2As shown, the explosion suppression device 120 may include an explosion suppression substance 121 and a support portion 122. The explosion suppression substance 121 is placed on the support portion 122, which may be fixedly installed inside the explosion relief conduit 110. The support portion 122 is used to move under the action of the explosion pressure released into the explosion relief conduit 110, thereby releasing the explosion suppression substance 121 into the explosion relief conduit 110. In this way, the explosion suppression device 120 can automatically release the explosion suppression substance 121 into the explosion relief conduit 110 under the triggering action of the explosion pressure, thereby suppressing secondary explosions caused by unburned dust in the explosion relief conduit 110.

[0063] like Figure 2 , Figure 3 and Figure 4 As shown, the bearing part 122 may include: a rotating shaft 1221, a first fan blade 1222, a second fan blade 1223 and a third fan blade 1224. The rotating shaft 1221 is arranged along the tangential direction of the explosion relief conduit 110. The two ends of the rotating shaft 1221 are fixed to the inner wall of the leakage conduit 110. The first fan blade 1222, the second fan blade 1223 and the third fan blade 1224 are respectively fixed to different sides of the rotating shaft 1221 to form a Y-shaped structure. The inclination of the Y-shaped structure is synchronized with the rotation of the rotating shaft 1221.

[0064] like Figure 2 , Figure 3 and Figure 4 As shown, the first vane 1222 and the second vane 1223 are symmetrically arranged with respect to the rotating shaft 1221 to form a V-shaped structure in the Y-shaped structure. The opening of the V-shaped structure faces the positive axial direction of the explosion relief duct 110, and the explosion suppression material 121 can be placed into the opening of the V-shaped structure.

[0065] like Figure 2 , Figure 3 and Figure 4 As shown, the fixed end of the third fan blade 1224 is fixed to the side of the rotating shaft, and the extended end is in the opposite direction to the axial direction of the explosion relief conduit 110. Figure 2 Extending in the opposite direction of the X-axis arrow, when there is no external force or the magnitude of the external force is less than or equal to a predetermined threshold, the third sector 1224 is located on the central axis of the V-shaped structure. Figure 2 As shown by the dashed line, to maintain the balance of the V-shaped structure, under the action of the explosion pressure exceeding the predetermined threshold, the extended end of the third vane 1224 tilts in the extension direction of the explosion relief conduit 110, thereby driving the rotating shaft 1221 to rotate. The rotation of the rotating shaft 1221 causes the V-shaped structure formed by the first vane 1222 and the second vane 1223 to tilt, or causes the first vane 1222 to tilt, thereby allowing the explosion suppressant 121 to be spilled into the explosion relief conduit 110. Thus, the supporting part 122 can automatically pour the explosion suppressant 121 into the explosion relief conduit 110 when triggered by an explosion in the container 200, thereby preventing the explosion flame in the container 200 from entering the explosion relief conduit 110.

[0066] The rotating shaft 1221 can include a rotating drum and a fixed rod, the rotating drum is sleeved on the fixed rod, the fixed rod is arranged in the tangential direction of the explosion venting duct 110 and is fixed at both ends of the inner wall of the explosion venting duct 110, the first fan blade 1222, the second fan blade 1223 and the third fan blade 1224 are respectively fixed on different sides of the rotating drum to form a Y-shaped structure, so that the inclination of the third fan blade 1224 can make the rotating drum rotate around the fixed rod, thereby driving the V-shaped structure formed by the first fan blade 1222 and the second fan blade 1223 to incline.

[0067] In order to keep the V-shaped structure balanced without explosion, avoid the explosion suppression material 121 from accidentally falling and affect the explosion venting effect, the weight of the first fan blade 1222 and the second fan blade 1223 is the same and is less than the weight of the third fan blade 1224, so that the gravity of the third fan blade 1224 can better maintain the balance of the V-shaped structure, effectively avoid the explosion suppression material 121 from accidentally falling, and further improve the explosion venting effect.

[0068] In some embodiments, the first fan blade 1222 and the second fan blade 1223 can select a metal plate with smaller density, and the third fan blade 1224 can select a metal plate with larger density. For example, the first fan blade 1222 and the second fan blade 1223 can select an aluminum plate, and the third fan blade 1224 can select an iron plate.

[0069] In some embodiments, the first fan blade 1222, the second fan blade 1223 and the third fan blade 1224 can select a metal with the same material, the size of the first fan blade 1222 and the size of the second fan blade 1223 can be the same and are less than the size of the third fan blade 1224.

[0070] In order to keep the V-shaped structure balanced without explosion, avoid the explosion suppression material 121 from accidentally falling and affect the explosion venting effect, the included angle between the first fan blade 1222 and the third fan blade 1224 and the included angle between the second fan blade 1223 and the third fan blade 1224 are the same. In this way, the Y-shaped structure is more stable and is not easy to incline, and the explosion suppression material 121 can also be effectively prevented from accidentally falling, thereby further improving the explosion venting effect.

[0071] In some embodiments, the included angle between the first fan blade 1222 and the third fan blade 1224 or the included angle between the second fan blade 1223 and the third fan blade 1224 can be 120°-150°. For example, the included angle can be 120°, 130°, 140°, 150°, etc. Of course, in specific applications, the above-mentioned included angle can also be other values, for example, 90°, 100°, 160°, etc. The specific value of the included angle is not limited in the present disclosure.

[0072] As shown in FIG. 1, the explosion venting device 100 can include an explosion venting duct 110 and a rotating shaft 1221. Figure 2 , Figure 3 andFigure 4 As shown in FIG. 12, the first sector 1222 leaves a gap with the inner wall of the explosion venting duct 110, and the second sector 1223 leaves a gap with the inner wall of the explosion venting duct 110. In this way, the explosion suppression substance 121 can be quickly poured into the explosion venting duct 110 when an explosion occurs, which is conducive to improving the explosion venting effect.

[0073] As shown in FIG. 12, the first sector 1222 leaves a gap with the inner wall of the explosion venting duct 110, and the second sector 1223 leaves a gap with the inner wall of the explosion venting duct 110. In this way, the explosion suppression substance 121 can be quickly poured into the explosion venting duct 110 when an explosion occurs, which is conducive to improving the explosion venting effect. Figure 2 Figure 3 Figure 4 As shown in FIG. 12, the diameter of the first sector 1222 is smaller than the diameter of the protrusion 111 on the explosion venting duct 110, and the diameter of the second sector 1223 is also smaller than the diameter of the protrusion 111 on the explosion venting duct 110. In this way, the first sector 1222 and the second sector 1223 will leave a gap with the inner wall of the explosion venting duct 110, respectively, which is conducive to the quick pouring of the explosion suppression substance 121, thereby further improving the explosion venting effect.

[0074] It should be noted that the gap between the first sector 1222 and the inner wall of the explosion venting duct 110 and the gap between the second sector 1223 and the inner wall of the explosion venting duct 110 can be freely set according to needs, and the adjustment and setting of these gaps can be realized by adjusting the size of the first sector 1222, the size of the second sector 1223, or the diameter of the protrusion 111 in the explosion venting duct 110. The present disclosure does not limit this.

[0075] As shown in FIG. 12, the diameter of the first sector 1222 is smaller than the diameter of the protrusion 111 on the explosion venting duct 110, and the diameter of the second sector 1223 is also smaller than the diameter of the protrusion 111 on the explosion venting duct 110. In this way, the first sector 1222 and the second sector 1223 will leave a gap with the inner wall of the explosion venting duct 110, respectively, which is conducive to the quick pouring of the explosion suppression substance 121, thereby further improving the explosion venting effect. Figure 2 Figure 3 Figure 4 As shown in FIG. 12, the explosion venting duct 110 can have a protrusion 111, the inside of the protrusion 111 is hollow, and the explosion suppression device 110 can be fixed on the inner wall of the protrusion 111, and the explosion suppression device 110 can be partially accommodated in the cavity of the protrusion 111.

[0076] As shown in FIG. 12, the diameter of the first sector 1222 is smaller than the diameter of the protrusion 111 on the explosion venting duct 110, and the diameter of the second sector 1223 is also smaller than the diameter of the protrusion 111 on the explosion venting duct 110. In this way, the first sector 1222 and the second sector 1223 will leave a gap with the inner wall of the explosion venting duct 110, respectively, which is conducive to the quick pouring of the explosion suppression substance 121, thereby further improving the explosion venting effect. Figure 2 Figure 3 Figure 4 As shown in FIG. 12, the protrusion 111 can be in the shape of a hemisphere, the rotating shaft 1221, the first sector 1222, and the second sector 1223 are all accommodated in the cavity of the protrusion 111, a part of the third sector 1224 is accommodated in the cavity of the protrusion 111, and another part is accommodated in the cavity of the pipe body of the explosion venting duct 110, and the rotating shaft 1221 is arranged in the tangential direction of the explosion venting duct 110 and is fixed at both ends on the inner wall of the protrusion 111.

[0077] Preferably, the rotating shaft 1221 can be fixed at the bottom diameter of the protrusion 111.

[0078] Preferably, the protrusion 111 can be arranged near the inlet of the explosion venting duct 110, so that the explosion suppression device 120 can be conveniently arranged near the inlet of the explosion venting duct 110, so as to better block the explosion flame from entering the explosion venting duct 110, thereby suppressing the secondary explosion in the explosion venting duct 110. ​​​​​​

[0079] The protrusion 111 is provided with a dispensing opening for dispensing the explosion suppression substance 121. Preferably, the dispensing opening can be arranged at the middle of the opening of the V-shaped structure to facilitate the dispensing of the explosion suppression substance 121.

[0080] As shown in Figure 2 and Figure 4 , the explosion venting device 100 further comprises an opening device 150 for closing the dispensing opening. When it is necessary to dispense the explosion suppression substance 121 into the explosion suppression device 120, the opening device 150 can be manually pulled open to open the dispensing opening, and the explosion suppression substance 121 can be dispensed into the opening of the V-shaped structure of the carrier 122 through the dispensing opening.

[0081] In practical applications, the opening device 150 can adopt any structure suitable for the explosion venting device. For example, the opening device 150 can be a metal plate with a handle at the top end, and the material thereof can be the same as that of the explosion venting duct 110.

[0082] As shown in Figure 4 , the inner wall of the protrusion 111 can be provided with a buckle 1225 for fixing the end of the rotating shaft 1221. When the buckle 1225 is locked, the end of the rotating shaft 1221 can be fixed, and the explosion suppression device 120 can be conveniently disassembled by unlocking the buckle 1225.

[0083] The explosion suppression substance 121 can be a gas, a liquid or a solid. In some embodiments, the explosion suppression substance 121 can be, but is not limited to, calcium carbonate, sodium bicarbonate or other substances with explosion suppression effect. For example, as shown in Figure 2 , the explosion suppression substance 121 can be calcium carbonate dust, sodium bicarbonate powder or other powders with explosion suppression effect. The explosion suppression substance 121 in the form of powder not only facilitates the dispensing and resting on the carrier, but also has better blocking effect on the explosion flame.

[0084] In practical applications, the amount of the explosion suppression substance 121 in the explosion suppression device 120 can be flexibly adjusted according to the actual scene requirements. For example, the amount of the explosion suppression substance 121 can be determined according to the powder used in the container 200, the size of the container 200, the diameter of the pipe opening of the explosion venting duct, the explosion pressure, the minimum ignition energy, the explosion limit, the explosion pressure and the rising rate, the nature of the ignition source and other factors.

[0085] Before use, the explosion suppression substance 121 can be dispensed into the explosion venting device 100. As shown in Figure 2 , the opening device is opened, and then an appropriate amount of explosion suppression powder such as NaHCO3 is put into the V-shaped structure formed by the first and second flaps 1222 and 1223, and finally the opening device is closed.

[0086] The working process of the explosion venting device 100 is as follows: when no dust explosion occurs in the container 200, the explosion suppression device 120 is in an initial state, and in the initial state, the third sector 1224 is vertically downward, and the first sector 1222, the second sector 1223 and the third sector 1224 form a "Y" type structure.

[0087] When a dust explosion occurs in the container 200, the leading pressure wave generated by the explosion opens the explosion venting piece 130 and is discharged into the explosion venting duct 110, pushes the third sector 1224 to tilt in the extension direction of the explosion venting duct 110 to drive the rotating shaft 1221 to start rotating, and the V-shaped structure formed by the first sector 1222 and the second sector 1223 or the first sector 1222 tilts under the drive of the rotating shaft 1221, so that the explosion suppression substance 121 such as NaHCO3 is scattered to form a dust cloud in the explosion venting duct 110. When the explosion venting flame reaches the explosion venting duct 110, the dust cloud formed by the NaHCO3 explosion suppression powder can suppress the explosion venting flame, thereby preventing the secondary explosion of the combustible dust in the explosion venting duct 110.

[0088] As can be seen from the above, the explosion venting device 100 provided by the embodiment of the present disclosure can automatically sprinkle the explosion suppression substance into the explosion venting duct 110 by only the shock wave (i.e., explosion pressure) generated by the explosion when the explosion occurs in the container 200, can suppress the explosion flame from entering the explosion venting duct 110, can prevent the unburned combustible dust from rushing into the explosion venting duct 110 from the container 200 to form a dust cloud and cause a secondary explosion, and can also prevent the formation of explosion venting reverse direction shock wave, thereby effectively improving the explosion venting effect of the explosion venting duct. In addition, the explosion venting device 100 of the present disclosure also has the advantages of no need for external force, no potential ignition source, intrinsic safety explosion suppression function and the like, and can realize the high efficiency and safety of the duct explosion venting technology in current industrial production.

[0089] Figure 5 The container explosion pressure experimental data comparison diagram of the conventional explosion venting piece, the conventional explosion venting duct and the explosion venting device of the present disclosure is shown. As shown in Figure 5 By comparing the container explosion pressure experimental data of the conventional explosion venting piece, the conventional explosion venting duct and the explosion venting device of the present disclosure, it can be found that the container explosion pressure peak value of the explosion venting device 100 of the present disclosure is 6% lower than that of the conventional explosion venting piece and very close to it, and is 29% lower than that of the conventional explosion venting duct. This indicates that the explosion venting device 100 of the present disclosure can effectively suppress the influence of the secondary explosion in the explosion venting duct on the explosion venting effect, and the explosion venting effect is obviously better than that of the conventional explosion venting duct, and slightly better than that of the conventional explosion venting piece.

[0090] In the description of the present disclosure, the description of the terms "one embodiment / way", "some embodiments / ways", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present disclosure. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / way or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the person skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples, without contradiction.

[0091] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0092] The person skilled in the art should understand that the above-mentioned embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A device for venting an explosion, characterized in that The application relates to a venting device for a container, comprising: a venting duct fixed at a venting opening of the container, for discharging explosion flame and explosion pressure in the container when an explosion occurs in the container; a suppressing device arranged in the venting duct, for releasing explosion suppressing substance into the venting duct under the action of explosion pressure discharged into the venting duct, so as to suppress secondary explosion in the venting duct, wherein the suppressing device comprises explosion suppressing substance and a bearing part, the explosion suppressing substance is placed on the bearing part, and the bearing part is fixedly arranged in the venting duct; the bearing part is used for moving under the action of explosion pressure discharged into the venting duct, so as to release the explosion suppressing substance into the venting duct, wherein the bearing part comprises a first sector, a second sector, a third sector and a rotating shaft; the rotating shaft is arranged along a tangential direction of the venting duct, two ends of the rotating shaft are fixed on an inner wall of the venting duct, the first sector, the second sector and the third sector are respectively fixed on different side surfaces of the rotating shaft to form a Y-shaped structure; the first sector and the second sector are symmetrically arranged relative to the rotating shaft to form a V-shaped structure in the Y-shaped structure, an opening of the V-shaped structure faces a positive axial direction of the venting duct, and the V-shaped structure is used for containing the explosion suppressing substance; a fixed end of the third sector is fixed on a side surface of the rotating shaft, an extending end extends to a negative axial direction of the venting duct, the third sector is located on a central axis of the V-shaped structure under the action of no external force or external force smaller than or equal to a predetermined threshold, so that the V-shaped structure keeps balance, and the extending end of the third sector inclines to an extending direction of the venting duct under the action of the explosion pressure larger than the predetermined threshold, so that the rotating shaft rotates, the rotation of the rotating shaft makes the V-shaped structure incline, so that the explosion suppressing substance is poured into the venting duct, the first sector and the second sector have the same weight and the weight is smaller than that of the third sector, the venting duct has a protrusion, the protrusion is hollow, the suppressing device is fixed on an inner wall of the protrusion, and the suppressing device is at least partially contained in a cavity of the protrusion.

2. The explosion venting device of claim 1, wherein The included angle between the first sector and the third sector and the included angle between the second sector and the third sector are the same; and / or the included angle between the first sector and the third sector or the included angle between the second sector and the third sector is 120-150 degrees.

3. The explosion venting device of claim 1, wherein A gap is left between the first sector and the inner wall of the venting duct, and a gap is left between the second sector and the inner wall of the venting duct.

4. The explosion venting device of claim 1, wherein The explosion suppressing substance is calcium carbonate or sodium bicarbonate.

5. The explosion relief device of claim 1, wherein A pouring opening is arranged on the protrusion, the pouring opening is used for pouring the explosion suppressing substance, and the venting device further comprises an opening device used for closing the pouring opening.

6. The explosion venting device of claim 1, wherein The venting device further comprises a venting sheet arranged at the venting opening of the container, used for opening the venting opening under the action of the explosion pressure, so that the venting duct is communicated with the container through the venting opening.

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