A drainage type explosion-proof device

Abstract

The present invention provides a drainage-type explosion-proof device, comprising a first air duct and a second air duct; the second air duct is sleeved on the periphery of the first air duct, the first air duct is formed by enclosing a first side wall, and the second air duct is limited by the first side wall and the second side wall; one end of the first air duct is set as a first opening, and the other end is closed as a first bottom; one end of the second air duct is set as a second opening, and the space between the first side wall and the second side wall at the other end is closed as a second bottom; the first bottom and the second bottom are arranged opposite to each other; a ventilation hole is provided on the first side wall, so that the first air duct and the second air duct are connected. The present invention utilizes the characteristics of shock waves being linear, easy to be reflected and not easy to flow around, and separates the shock wave travel air duct from the daily ventilation air flow inlet and outlet duct, thereby greatly improving the protection performance, ensuring the safety of the air outlet, simplifying the structure, and reducing the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-explosion valves, and in particular to a drainage-type anti-explosion device. Background Art

[0002] Traditional explosion-proof devices are mainly divided into two categories. The most common one is the explosion-proof valve (international names include blast valve and blast damper), which uses a device that can close the air duct under pressure, such as a movable valve leaf or valve core, to block the shock wave channel. The other is a device that uses a multi-stage shock wave attenuation grid array to gradually reduce the shock wave pressure. Such devices are usually called explosion-proof shutters or shock wave attenuators. Traditional explosion-proof devices have two significant common characteristics. One is that they rely on complete or partial blocking to attenuate shock waves. The other is that the path of the shock wave is the same as the path of daily ventilation air, that is, the same channel. However, the structures of these two explosion-proof devices are complex and the cost is high. Moreover, traditional explosion-proof devices mainly attenuate shock waves. In the end, the shock wave will still pass through the normal air channel. It just attenuates the energy of the shock wave and reduces the harm of the shock wave to a safe range. Such safety is not particularly high.

[0003] Invention patent content

[0004] To address the above technical issues, the present invention provides a channeling explosion-proof device. This device utilizes the linearity of shock waves, which are easily reflected and difficult to bypass. The shock wave path is separated from the path of normal ventilation airflow, and the shock wave is channeled into a closed area. Upon reaching the end of the closed area, the shock wave is reflected out of the entrance and exit, allowing the reflected shock wave to escape freely. Meanwhile, normal ventilation airflow can bypass and enter the protected area.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] A drainage-type explosion-proof device includes a first air duct and a second air duct; wherein,

[0007] The second air duct is sleeved on the periphery of the first air duct, the first air duct is formed by enclosing the first side wall, and the second air duct is defined by the first side wall and the second side wall;

[0008] One end of the first air duct is set as a first opening, and the other end is closed as a first bottom;

[0009] One end of the second air duct is set as a second opening, and the space between the first side wall and the second side wall at the other end is closed to form a second bottom;

[0010] The first bottom and the second bottom are arranged opposite to each other;

[0011] The first side wall is provided with ventilation holes, so that the first air duct and the second air duct are connected, and air can flow between the first air duct and the second air duct.

[0012] When in use, the first air duct can be used as a traveling channel for the shock wave, and the second air duct can also be used as a traveling channel for the shock wave.

[0013] Furthermore, the distance between the ventilation hole and the first opening is no more than 1 / 3 of the length of the first air duct;

[0014] The first opening is flush with the second bottom or protrudes from the second bottom;

[0015] The first bottom is flush with the second opening, or protrudes from the second opening, or is located in the second opening.

[0016] Furthermore, the second opening is arranged at the end of the second air duct or on the second side wall, and can adapt to different air flow outlet directions.

[0017] Furthermore, the second opening is provided with a flange for connecting to an air duct.

[0018] Furthermore, the distance between the ventilation hole and the second opening is no more than 1 / 3 of the length of the second air duct;

[0019] The first bottom is flush with the second opening, or protrudes from the second opening, or is located in the second opening;

[0020] The first opening is flush with the second bottom or protrudes from the second bottom.

[0021] Furthermore, the first opening is arranged at the end of the first air duct; or the first side wall protrudes from the second bottom, and the first opening is arranged on the first side wall outside the second air duct.

[0022] Furthermore, the first opening is provided with a flange for connecting to an air duct.

[0023] Furthermore, one or more flat plate reinforcing ribs connecting the first side wall and the second side wall are provided in the second air duct to improve the strength of the explosion-proof device.

[0024] Furthermore, a drainage-type explosion-proof device includes a first air duct and a second air duct; wherein,

[0025] The first air duct is formed by enclosing a first side wall, the second air duct is formed by enclosing a second side wall, and a portion of the first side wall and a portion of the second side wall jointly form a partition;

[0026] One end of the first air duct is set as a first opening, and the other end is closed as a first bottom; one end of the second air duct is set as a second opening, and the other end is closed as a second bottom; the first bottom and the second bottom are arranged opposite to each other;

[0027] The partition is provided with ventilation holes, so that the first air duct and the second air duct are connected, and air flow can flow between the first air duct and the second air duct.

[0028] The first air duct and the second air duct are overlapped, and the first air duct can be used as a traveling channel for the shock wave, and the second air duct can also be used as a traveling channel for the shock wave.

[0029] Furthermore, the distance between the ventilation hole and the first opening is not greater than 1 / 3 of the length of the first air duct, or the distance between the ventilation hole and the second opening is not greater than 1 / 3 of the length of the second air duct.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. Taking advantage of the characteristics of shock waves, which are linear, easy to be reflected and difficult to flow around, the shock wave travel channel and the daily ventilation air flow travel channel are separated, which greatly improves the protection performance and ensures the safety of the air outlet.

[0032] 2. For high explosives, such as TNT, the ultra-high pressure and ultra-short time shock waves generated by close-range explosions have extremely high protection efficiency.

[0033] 3. Simple structure and various forms reduce costs and can be customized according to specific protection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of the first embodiment of the drainage-type explosion-proof device of the present invention.

[0035] Figure 2 It is a structural schematic diagram of the second embodiment of the drainage-type explosion-proof device of the present invention.

[0036] Figure 3 It is a structural schematic diagram of the third embodiment of the drainage-type explosion-proof device of the present invention.

[0037] Figure 4 It is a structural schematic diagram of the fourth embodiment of the drainage-type explosion-proof device of the present invention.

[0038] Figure 5 It is a structural schematic diagram of the fifth embodiment of the drainage-type explosion-proof device of the present invention.

[0039] Figure 6 It is a structural schematic diagram of the sixth embodiment of the drainage-type explosion-proof device of the present invention.

[0040] Figure 7 It is a structural schematic diagram of the seventh embodiment of the drainage-type explosion-proof device of the present invention.

[0041] Figure 8 It is a structural schematic diagram of the eighth embodiment of the drainage-type explosion-proof device of the present invention.

[0042] Figure 9 It is a structural schematic diagram of the ninth embodiment of the drainage-type explosion-proof device of the present invention.

[0043] Figure 10 Schematic diagram of the structure of the tenth embodiment of the drainage-type explosion-proof device of the present invention.

[0044] Figure 11 It is a structural schematic diagram of the eleventh embodiment of the drainage-type explosion-proof device of the present invention.

[0045] Figure 12 It is a structural schematic diagram of the twelfth embodiment of the drainage-type explosion-proof device of the present invention.

[0046] Figure 13 It is a structural schematic diagram of the thirteenth embodiment of the drainage-type explosion-proof device of the present invention.

[0047] Figure 14 AA cross-sectional structural diagram of the first embodiment of the present invention.

[0048] Figure 15 It is a structural schematic diagram of the fourteenth embodiment of the drainage-type explosion-proof device of the present invention.

[0049] Figure 16 It is a structural schematic diagram of the fifteenth embodiment of the drainage-type explosion-proof device of the present invention.

[0050] Figure 17 It is a structural schematic diagram of the sixteenth embodiment of the drainage-type explosion-proof device of the present invention.

[0051] Figure 18 FIG. 1 is a schematic structural diagram of a BB section of the fourteenth embodiment of the present invention.

[0052] Figure 19 FIG. 1 is a structural diagram of another embodiment of the BB section of the fourteenth embodiment of the present invention.

[0053] In the figure: 1-first air duct; 11-first side wall; 12-first opening; 13-first bottom; 2-second air duct; 21-second side wall; 22-second opening; 23-second bottom; 3-ventilation hole; 4-flange; 5-air duct; 6-connecting pipe; 7-reinforcement rib; 8-partition. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0055] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In addition, it should be noted that, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, connection can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] First embodiment

[0058] The present invention provides a drainage type explosion-proof device, such as Figure 1 As shown, it includes a first air duct 1 and a second air duct 2; wherein the second air duct 2 is sleeved on the periphery of the first air duct 1, the first air duct 1 is enclosed by a first side wall 11, and the second air duct 2 is defined by the first side wall 11 and the second side wall 21; the first air duct 1 is the inner air duct, and the second air duct 2 is the outer air duct. One end of the first air duct 1 is set as a first opening 12, and the other end is closed as a first bottom 13; one end of the second air duct 2 is set as a second opening 22, and the other end between the first side wall 11 and the second side wall 21 is closed as a second bottom 23; the first bottom 13 and the second bottom 23 are arranged opposite each other. Preferably, the first air duct 1 is a straight tube, the first opening 12 is flush with the second bottom 23, the first bottom 13 is flush with the second opening 22, and the second opening 22 is arranged at the end of the second air duct 2. The first side wall 11 is provided with a ventilation hole 3, which connects the first air duct 1 and the second air duct 2, allowing air to flow between the first air duct 1 and the second air duct 2.

[0059] The explosion-proof device can provide daily ventilation function, and can also provide efficient anti-shock wave function when the shock wave comes. In this embodiment, the first opening 12 is the entrance of the shock wave. When in use, the first opening 12 is facing the direction of the shock wave. During daily ventilation, the air flow travels at a low speed and is easy to bypass. Figure 1 Middle curved arrow As shown, air enters the first air duct 1 from the first opening 12, then enters the second air duct 2 from the ventilation hole 3, and then flows out from the second opening 22 to achieve indoor and outdoor ventilation. Figure 1As shown by the straight arrow “→” in the middle, the explosion-proof device introduces the shock wave from the first opening 12 into the first air duct 1, and its direction of travel is linear, easily reflected, and not easy to circumvent. Therefore, the shock wave directly impacts the first bottom 13 at an extremely high speed, and does not enter the second air duct 2 through the ventilation hole 3. Shock waves are generally generated instantaneously and last for an extremely long time. When the shock wave reaches the first bottom 13, it is reflected and reflected out of the first opening 12. At this time, the external shock wave has disappeared, and the reflected shock wave can escape freely, greatly improving the protection performance, ensuring the safety of the second opening 22, and providing a highly efficient anti-shock wave function. Especially for high explosives, such as TNT, the ultra-high pressure and ultra-short time shock waves generated by close-range explosions have extremely high protection efficiency.

[0060] After the shock wave enters the bottom of the air duct, it is reflected. The reflected gas pressure will increase by one to several times compared to the incident pressure. Therefore, the farther the ventilation hole 3 is from the first bottom 13, the less the second air duct 2 is affected by the reflected high pressure, and the better the shock wave resistance. Therefore, when the first air duct 1 serves as the shock wave travel channel, in order to reduce the impact of the reflected high pressure on the second air duct 2 and further improve the shock wave resistance, when the ventilation hole 3 is provided, it is necessary to ensure that the distance between the ventilation hole 3 and the first opening 12 is no more than 1 / 3 of the length of the first air duct 1. This increases the distance between the first bottom 13 and the ventilation hole 3, thereby increasing the travel path of the reflected shock wave.

[0061] The second air duct 2 is sleeved on the outer periphery of the first air duct 1. Figure 14 As shown, one or more flat-plate reinforcing ribs 7 connecting the first side wall 11 and the second side wall 21 can be provided in the second air duct 2 to improve the strength of the explosion-proof device. The ventilation holes 3 can be one or more through holes surrounding the circumference of the first air duct 1. When the ventilation holes 3 are multiple through holes, preferably, the reinforcing ribs 7 are provided between adjacent through holes so that the reinforcing ribs 7 do not block the ventilation holes 3. The reinforcing ribs 7 extend along the extension direction of the first air duct 1 or the second air duct 2, and can extend to the second bottom 23, or have a gap with the second bottom 23, so that even if the second air duct 2 is divided into multiple channels by the reinforcing ribs 7, they can be interconnected without affecting the ventilation effect and the anti-shock wave effect. The second air duct 2 of the explosion-proof device is provided with reinforcing ribs 7, which can be processed and manufactured by a casting process.

[0062] The cross-sectional shape of the first side wall 11 and the second side wall 21 can be square, rectangular, circular or elliptical, or any combination thereof. For example, the cross-sectional shape of the first side wall 11 is square, and the cross-sectional shape of the second side wall 21 is circular; or the cross-sectional shape of the first side wall 11 and the second side wall 21 are both circular, etc. The cross-sectional shape of the first side wall 11 and the second side wall 21 is not limited in the present invention and can be set arbitrarily as needed.

[0063] Second embodiment

[0064] The other components are the same as those in the first embodiment, except that Figure 2 As shown, the first opening 12 protrudes from the second bottom 23 .

[0065] Third embodiment

[0066] The other components are the same as those in the second embodiment, except that Figure 3 As shown, the first bottom 13 protrudes from the second opening 22 .

[0067] Fourth embodiment

[0068] The other components are the same as those in the second embodiment, except that Figure 4 As shown, the first bottom 13 is located in the second opening 22 .

[0069] Fifth embodiment

[0070] The other components are the same as those in the third embodiment, except that Figure 5 As shown, the first air duct 1 is a curved pipe, so that the perpendicular line of the plane where the first bottom 13 is located and the perpendicular line of the plane where the first opening 12 is located have an angle α, and the size of the angle α can be set as needed. Preferably, the angle α is a right angle or an obtuse angle.

[0071] Sixth embodiment

[0072] The other components are the same as those in the third embodiment, except that Figure 6 As shown, the second opening 22 is provided on the second side wall 21 and can be adapted to different airflow outlet directions as needed. The second opening 22 can be provided directly on the second side wall 21, or a section of the connecting pipe 6 can be welded to the second side wall 21, with the end of the connecting pipe 6 provided as the second opening 22. Since the connecting pipe 6 does not require shock wave resistance, the wall thickness of the connecting pipe 6 can preferably be thinner than that of the second side wall 21.

[0073] Seventh embodiment

[0074] The other components are the same as those in the first embodiment, except that Figure 7As shown, a flange 4 is provided at the second opening 22 for connecting the air duct 5, rather than directly providing the second opening 22 as an air outlet. Preferably, the wall thickness of the air duct 5 can also be thinner than the wall thickness of the second side wall 21.

[0075] Eighth embodiment

[0076] The other components are the same as those of the seventh embodiment, except that Figure 8 As shown, a flange 4 is provided at the second opening 22 to connect to the air duct 5 , and the outlet direction of the airflow is adjusted by adjusting the direction of the outlet of the air duct 5 .

[0077] Ninth embodiment

[0078] The other components are the same as those in the first embodiment, except that Figure 9 As shown, when the second air duct 2 is used as a shock wave propagation channel, when setting the ventilation hole 3, it is necessary to make the distance between the ventilation hole 3 and the second opening 22 no greater than 1 / 3 of the length of the second air duct 2, and increase the distance between the second bottom 23 and the ventilation hole 3.

[0079] In this embodiment, the second opening 22 is the entrance for the shock wave. When in use, the second opening 22 is oriented toward the direction of the shock wave. The first opening 12 is the airflow outlet during normal ventilation. The first opening 12 is flush with the second bottom 23 and can be set at the end of the first air duct 1.

[0080] In daily use and normal ventilation, air enters the second air duct 2 from the second opening 22, enters the first air duct 1 through the vent 3, and then flows out from the first opening 12. When a shock wave comes, the shock wave enters the second air duct 2 from the second opening 22, reaches the second bottom 23, and is reflected.

[0081] Tenth embodiment

[0082] The other components are the same as those of the ninth embodiment, except that Figure 10 As shown, the first bottom 13 protrudes from the second opening 22 .

[0083] Eleventh embodiment

[0084] The other components are the same as those of the ninth embodiment, except that Figure 11 As shown, the first bottom portion 13 is located within the second opening 22. In this embodiment, when a shock wave arrives, the shock wave enters the second air duct 2 from the second opening 22. A portion of the shock wave first reaches the first bottom portion 13 and is reflected by the first bottom portion 13, while a portion of the shock wave reaches the second bottom portion 23 and is reflected by the second bottom portion 23.

[0085] Twelfth embodiment

[0086] The other components are the same as those of the tenth embodiment, except that Figure 12 As shown, a flange 4 is provided at the first opening 12 for connecting to an air duct 5 .

[0087] Thirteenth embodiment

[0088] The other components are the same as those of the twelfth embodiment, except that Figure 13 As shown, the first opening 12 is provided on the first side wall 11. This can be done directly on the first side wall 11, or a section of connecting pipe 6 can be welded to the first side wall 11, with the end of the connecting pipe 6 provided as the first opening 12. In this case, the first side wall 11 protrudes from the second bottom 23, and the first opening 12 is provided on the first side wall 11 outside the second air duct 2. Similarly, a flange 4 can be provided at the first opening 12 for connecting to the air duct 5.

[0089] Apart from Figure 1-13 In addition to the arrangement of the first opening 12, the first bottom 13, the second opening 22, the second bottom 23, and the flange 4 shown in FIG, any combination of the arrangement of the first opening 12, the first bottom 13, the second opening 22, the second bottom 23, and the flange 4 can be used as needed, and no further description is given here. Preferably, in order to lengthen the path of the reflected shock wave, when the first air duct 1 is provided, the length of the first air duct 1 can be extended as much as possible, and when the second air duct 2 is provided, the length of the second air duct 2 can be shortened as much as possible, which can ensure the anti-shock wave effect while saving materials and reducing costs.

[0090] Fourteenth embodiment

[0091] The present invention also provides a drainage type explosion-proof device, such as Figure 15 As shown, the device comprises a first air duct 1 and a second air duct 2; wherein the first air duct 1 is formed by enclosing a first side wall 11, and the second air duct 2 is formed by enclosing a second side wall 21, with portions of the first side wall 11 and the second side wall 21 jointly forming a partition 8. One end of the first air duct 1 is configured as a first opening 12, and the other end is closed as a first bottom 13; one end of the second air duct 2 is configured as a second opening 22, and the other end is closed as a second bottom 23; the first bottom 13 and the second bottom 23 are arranged opposite each other. The partition 8 is provided with ventilation holes 3, connecting the first air duct 1 and the second air duct 2, allowing air to flow between the first air duct 1 and the second air duct 2.

[0092] In this embodiment, the first air duct 1 serves as a path for shock waves to travel, and the distance between the ventilation holes 3 and the first opening 12 is no greater than one-third of the length of the first air duct 1. During use, the first opening 12 is oriented toward the direction of the shock wave. During normal ventilation, air enters the first air duct 1 through the first opening 12, then enters the second air duct 2 through the ventilation holes 3, and then flows out through the second opening 22. When a shock wave arrives, the shock wave enters the first air duct 1 through the first opening 12, reaches the first bottom 13, and then reflects.

[0093] like Figure 18 As shown, the cross-sectional shapes of the first air duct 1 and the second air duct 2 can be triangular, square, rectangular or semicircular. Figure 19 As shown, the combination of its cross-sectional shape is square, rectangular, circular or elliptical, etc.

[0094] Fifteenth embodiment

[0095] The other components are the same as those in the fourteenth embodiment, except that in this embodiment, when the second air duct 2 is used as the path for the shock wave, Figure 16 As shown, the distance between the ventilation hole 3 and the second opening 22 is no more than one-third the length of the second air duct 2. During use, the second opening 22 is oriented toward the direction of the incoming shock wave. During normal ventilation, air enters the second air duct 2 through the second opening 22, then enters the first air duct 1 through the ventilation hole 3, and then flows out through the first opening 12. When a shock wave strikes, the shock wave enters the second air duct 2 through the second opening 22, reaches the second bottom 23, and then reflects.

[0096] Sixteenth embodiment

[0097] The other components are the same as those in the fourteenth embodiment, except that, in this embodiment, in order to improve the shock wave resistance effect, Figure 17 As shown, the length of the first air duct 1 serving as the shock wave propagation channel is lengthened so that the length of the first air duct 1 is greater than that of the second air duct 2 .

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drainage type explosion-proof device, characterized in that: It includes a first air duct and a second air duct; wherein, The second air duct is sleeved on the periphery of the first air duct, the first air duct is formed by enclosing the first side wall, and the second air duct is defined by the first side wall and the second side wall; One end of the first air duct is set as a first opening, and the other end is closed as a first bottom; One end of the second air duct is set as a second opening, and the space between the first side wall and the second side wall at the other end is closed to form a second bottom; The first bottom and the second bottom are arranged opposite to each other; The first side wall is provided with a ventilation hole so that the first air duct and the second air duct are connected; The second opening serves as an entrance for the shock wave, and the distance between the ventilation hole and the second opening is no more than 1 / 3 of the length of the second air duct.

2. The drainage-type explosion-proof device according to claim 1, characterized in that: The second opening is provided at an end portion of the second air duct.

3. The drainage-type explosion-proof device according to claim 1, characterized in that: The first bottom is flush with the second opening, or protrudes from the second opening, or is located in the second opening; The first opening is flush with the second bottom or protrudes from the second bottom.

4. The drainage-type explosion-proof device according to claim 3, characterized in that: The first opening is arranged at the end of the first air duct; or the first side wall protrudes from the second bottom, and the first opening is arranged on the first side wall outside the second air duct.

5. The drainage-type explosion-proof device according to claim 4, characterized in that: The first opening is provided with a flange for connecting to an air duct.

6. The drainage-type explosion-proof device according to any one of claims 1 to 5, characterized in that: One or more flat plate reinforcing ribs connecting the first side wall and the second side wall are provided in the second air duct.

7. A drainage type explosion-proof device, characterized in that: It includes a first air duct and a second air duct; wherein, The first air duct is formed by enclosing a first side wall, the second air duct is formed by enclosing a second side wall, and a portion of the first side wall and a portion of the second side wall jointly form a partition; One end of the first air duct is set as a first opening, and the other end is closed as a first bottom; one end of the second air duct is set as a second opening, and the other end is closed as a second bottom; the first bottom and the second bottom are arranged opposite to each other; The partition is provided with ventilation holes so that the first air duct and the second air duct are connected; The second opening serves as an entrance for the shock wave, and the distance between the ventilation hole and the second opening is no more than 1 / 3 of the length of the second air duct.

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