An anti-knock safety isolation air supply system

Abstract

The utility model relates to a blast -resistant room safety isolation air supply system, and the blast -resistant room safety isolation air supply system is provided with the blast -resistant room safety isolation air supply system, including air conditioning unit and air supply pipeline, the air conditioning unit sets up in the machine room, the blast -resistant room has three concrete walls and one side wall of the explosion -relief surface, the machine room is located one side of any concrete wall of the blast -resistant room, one end of air supply pipeline is linked with the air outlet of air conditioning unit and communicates, and the other end of air supply pipeline passes through the wall of the explosion -relief surface and extends to the blast -resistant room, and the wall of the explosion -relief surface is equipped with the pressure -relief window, the air supply pipeline is installed with the explosion -proof check valve for controlling its on -off, and the air conditioning unit is the direct -current air conditioning unit. Not only has solved the blast -resistant room air conditioning air supply's safety core technical problem, but also has reduced the equipment investment through the system optimization significantly.

Description

Technical Field

[0001] This utility model relates to the field of air supply system technology, specifically to an explosion-proof room safety isolation air supply system. Background Technology

[0002] In the production, processing, and storage of military explosives (such as gunpowder, explosives, and propellants), explosion-proof (suppression) chambers within production facilities are crucial safety features. To ensure that in the event of an accidental explosion within these chambers, the blast wave and its destructive effects are effectively isolated to a localized area, preventing catastrophic damage to adjacent production areas and the main structure, these explosion-proof (suppression) chambers are typically designed with extremely robust structures. Their roofs and walls are generally constructed using reinforced concrete with a thickness of approximately 800mm, providing exceptionally high resistance to blast impacts. Simultaneously, to provide necessary pressure relief channels under overpressure conditions, lightweight pressure relief windows are usually designed only on designated pressure relief surfaces. Furthermore, to avoid compromising the integrity of the main structure, building codes strictly limit the number of openings exceeding 100mm in diameter in concrete walls and roofs.

[0003] However, this unique and enclosed building structure presents significant technical challenges to the design of its internal environmental control, particularly the air conditioning system. Explosion-proof (suppressed) rooms are hazardous environments where the air may contain flammable dust or explosive gases. If conventional air conditioning systems are used, ordinary air conditioning fans and motors, if not explosion-proof or installed outside hazardous areas, may generate electrical sparks, mechanical friction sparks, or high surface temperatures during operation, potentially igniting explosive mixtures and posing a significant safety hazard. Conversely, designing the entire air conditioning unit as explosion-proof often results in high equipment costs, system complexity, and difficult maintenance.

[0004] Therefore, there is an urgent need for a safe and low-cost air conditioning system. Utility Model Content

[0005] (I) The problem that this utility model aims to solve is that if a conventional air conditioning system is used, there are huge safety hazards. If the entire air conditioning unit is set to be explosion-proof, it often results in high equipment cost, complex system and difficult maintenance.

[0006] (II) Technical Solution

[0007] An explosion-proof room safety isolation air supply system includes an air conditioning unit and an air supply duct. The air conditioning unit is installed in a machine room. The explosion-proof room has three concrete walls and one explosion-proof wall. The machine room is located on one side of any of the concrete walls of the explosion-proof room.

[0008] One end of the air supply duct is connected to the air outlet of the air conditioning unit, and the other end passes through the explosion-proof wall and extends into the explosion-proof room. The explosion-proof wall is provided with a pressure relief window.

[0009] The air supply duct is equipped with an explosion-proof check valve for controlling its on / off state.

[0010] The air conditioning unit is a DC air conditioning unit.

[0011] According to one embodiment of the present invention, the explosion-proof check valve is an explosion-proof check valve made of non-sparking metal. According to one embodiment of the present invention, the air supply duct is a circular pipe with rounded corners, and both the inner and outer walls of the circular pipe are smooth.

[0012] According to one embodiment of the present invention, the concrete wall parallel to the explosion-proof room and the explosion-proof surface wall is a concrete side wall, and the machine room is located on one side of the concrete side wall;

[0013] The air supply duct includes an air outlet vertical pipe, a first air outlet elbow, an air outlet horizontal pipe, a second air outlet elbow, and an outlet pipe connected in sequence.

[0014] The first end of the air outlet vertical pipe is connected to the air outlet of the air conditioning unit, and a fire damper is installed between its second end and the first end of the first air outlet elbow. The explosion-proof check valve is installed between the first air outlet elbow and the air outlet horizontal pipe.

[0015] The end of the second outlet bend away from the outlet horizontal pipe passes through the explosion relief wall, and the outlet pipe is located inside the explosion-proof chamber.

[0016] According to one embodiment of the present invention, the top of the explosion-proof room is equipped with a plurality of support seats for supporting the horizontal air outlet pipe.

[0017] The beneficial effects of this utility model are:

[0018] In this embodiment, a unique layout is proposed, in which the machine room is located on the blast-resistant side, and the air supply duct runs along the roof to the blast-venting side and enters the blast-resistant room. This layout is the basis for achieving safe air supply without damaging the main structure of the blast-resistant wall. In addition, by combining "bypass ducting" with "explosion-proof check valve", a DC air conditioning air supply system specifically for blast-resistant rooms is constructed. This system integration scheme makes it possible to use non-explosion-proof air conditioning units while ensuring absolute safety. Compared with purchasing dedicated explosion-proof air conditioners or modifying ordinary units to be explosion-proof, the initial investment in equipment is significantly reduced. It not only solves the core technical problem of safe air conditioning air supply in blast-resistant rooms, but also significantly reduces equipment investment through system optimization. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram provided for an embodiment of this utility model.

[0021] Icons: 1. Explosion-proof room; 101. Concrete side wall; 102. Explosion-proof wall; 2. Machine room; 3. Air conditioning unit; 4. Air inlet duct; 5. Air outlet vertical duct; 6. Fire damper; 7. First air outlet bend; 8. Explosion-proof check valve; 9. Air outlet horizontal duct; 10. Second air outlet bend; 11. Outlet pipe; 12. Support seat. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figure 1 As shown, one embodiment of the present invention provides a safe isolation air supply system for an explosion-proof room, including an air conditioning unit 3 and an air supply duct. The air conditioning unit 3 is installed in the machine room 2. The explosion-proof room 1 has three concrete walls and one explosion relief wall 102. The machine room 2 is located on one side of any of the concrete walls of the explosion-proof room 1.

[0024] One end of the air supply duct is connected to the air outlet of the air conditioning unit 3, and the other end passes through the explosion-proof wall 102 and extends into the explosion-proof room 1. The explosion-proof wall 102 is equipped with a pressure relief window. An explosion-proof check valve 8 is installed on the air supply duct to control its on / off state. The air conditioning unit 3 is a DC air conditioning unit.

[0025] It should be noted that when designing the installation location of the air supply duct, the following problems would arise if the air supply duct of the air conditioning unit were to pass directly through the concrete wall of the explosion-proof room 1 into the room: First, drilling a large opening in the thick reinforced concrete wall for the duct to pass through would damage the structural integrity of the explosion-proof wall and reduce its impact resistance; Second, in the event of an explosion, the shock wave would use the duct as a "conduction path," easily destroying the air conditioning equipment and other equipment in the machine room 2, and potentially transmitting the destructive effects to other areas, causing secondary damage.

[0026] In this embodiment, firstly, the machine room 2 is located on one side of any concrete wall of the explosion-proof room 1, that is, the machine room 2 is not adjacent to the explosion-proof room 1. In addition, one end of the air supply duct passes through the explosion relief wall 102 and extends into the explosion-proof room 1; in this way, the shock wave is preferentially released from the pressure relief window, and the shock wave is difficult to directly enter the air supply duct. Secondly, since the air conditioning unit 3 is a direct-flow air conditioning unit 3, the air in the explosion-proof room 1 is directly discharged to the outside through an independent exhaust system (not shown in the figure), and the air conditioning unit 3 does not perform return air. In addition, when the system is supplying air normally, the airflow pushes open the valve plate of the explosion-proof check valve 8 and supplies air into the room. Once an explosion occurs in the room, a small amount of shock wave may surge back towards the air supply duct. At this time, the explosion-proof check valve 8 closes instantly under the action of the backflow, forming an effective physical barrier, thereby preventing the shock wave from damaging the air conditioning unit 3 and other equipment in the machine room 2 through the air supply duct, and also preventing damage to the explosion-proof wall, ensuring the integrity and protective capability of the main structure of the concrete wall during an explosion. Moreover, the explosion-proof check valve 8 can also prevent dusty air from being sucked back into the air conditioning system, eliminating the secondary explosion hazard caused by dust accumulation inside the air conditioning unit 3. Third, since the explosion-proof room 1 has a reliable safety isolation air supply system that isolates the dangerous area, the computer room 2 is considered a safe area. Therefore, it is permissible to use conventional non-explosion-proof air conditioning units 3. Compared with purchasing dedicated explosion-proof air conditioners or modifying ordinary units to be explosion-proof, the initial investment in equipment is significantly reduced.

[0027] In this embodiment, a unique layout is proposed, in which the machine room 2 is located on the explosion-proof side, and the air supply duct runs along the roof to the explosion-proof side and enters the explosion-proof room 1. This layout is the basis for achieving safe air supply without damaging the main structure of the explosion-proof wall. In addition, by combining the "bypass ducting" with the "explosion-proof check valve 8", a DC air conditioning air supply system specifically for the explosion-proof room 1 is constructed. This system integration scheme makes it possible to use non-explosion-proof air conditioning units 3 under the premise of ensuring absolute safety. Compared with purchasing dedicated explosion-proof air conditioners or modifying ordinary units to be explosion-proof, the initial investment in equipment is greatly reduced. It not only solves the core technical problem of safe air supply in the explosion-proof room 1, but also significantly reduces equipment investment through system optimization.

[0028] In some embodiments, the explosion-proof check valve 8 is an explosion-proof check valve made of non-sparking metal. Structurally, the explosion-proof check valve 8 is no different from a conventional explosion-proof check valve. The only difference is that all moving parts (such as valve plates and shafts) and fixed parts (such as valve bodies and seals) of this explosion-proof check valve 8 are made of non-sparking metal materials (such as copper alloys, specific grades of stainless steel, or other certified non-sparking alloy materials). Because all components are made of non-sparking materials, even when the valve plate closes rapidly and impacts or rubs against the valve seat, no mechanical sparks are generated, thus preventing the ignition of explosive dust that may have accumulated in the duct downstream of the valve.

[0029] As a specific embodiment, the concrete wall parallel to the explosion-proof room 1 and the explosion-proof wall 102 is a concrete side wall 101, and the machine room 2 is located on one side of the concrete side wall 101. That is, as shown... Figure 1 As shown, the equipment room 2 is located on the left side of the concrete side wall 101. Of course, the equipment room 2 can also be located on one side of the other three concrete walls, as long as the equipment room 2 is not located on the same side as the explosion relief wall 102.

[0030] like Figure 1 As shown, the air supply duct includes a vertical air outlet pipe 5, a first air outlet bend 7, a horizontal air outlet pipe 9, a second air outlet bend 10, and an outlet pipe 11 connected in sequence. The air outlet of the air conditioning unit 3 faces upwards. The bottom end of the vertical air outlet pipe 5 is connected to the air outlet of the air conditioning unit 3, and a fire damper 6 is installed at its top. The first air outlet bend 7 is an elbow pipe; its first end is connected to the fire damper 6, and its other end points towards the side where the explosion-proof wall 102 is located. The first air outlet bend 7 is located at the top of the machine room 2.

[0031] Furthermore, multiple support seats 12 are installed on the roof of the blast-resistant room 1. These support seats 12 are arranged along the direction from the concrete sidewall 101 to the explosion-proof wall 102. A horizontal exhaust pipe 9 is installed between the support seats 12, and an explosion-proof check valve 8 is sealed between the first exhaust bend 7 and the horizontal exhaust pipe 9. The second exhaust bend 10 is a U-shaped pipe. The first end of the second exhaust bend 10 is connected to the end of the horizontal exhaust pipe 9 furthest from the explosion-proof check valve 8, and the second end of the second exhaust bend 10 passes through the explosion-proof wall 102 and connects to the outlet pipe 11. It should be noted that the end of the outlet pipe 11 is equipped with a flange, and the piping system inside the blast-resistant room 1 can be sealed to the end of the outlet pipe 11 using the flange. The piping system inside the blast-resistant room 1 is designed according to different requirements, and no limitations are imposed on the piping system here.

[0032] Furthermore, an air inlet pipe 4 is installed at the air inlet of the air conditioning unit 3, and the air inlet pipe 4 extends into the external environment through the mounting hole on the wall of the machine room 2.

[0033] It is important to understand that since air conditioning unit 3 is a direct-flow air conditioning unit, it does not require return air. Therefore, when air conditioning unit 3 is operating, no explosive dust will be drawn into the air supply duct. When air conditioning unit 3 is shut down, a small amount of explosive dust may be drawn in due to the negative pressure in the air supply duct. However, in this embodiment, once air conditioning unit 3 stops, the explosion-proof check valve 8 immediately closes to prevent explosive dust from entering the air conditioning unit 3 through the air supply duct. Therefore, air conditioning unit 3 can be a non-explosion-proof air conditioner.

[0034] In addition, the first air outlet bend 7 is an elbow pipe, and the second air outlet bend 10 is a U-shaped pipe. Because the air supply duct is long enough and has multiple bends, even if a small amount of shock wave enters the air supply duct, the shock wave will be quickly consumed within the duct. Combined with the explosion-proof check valve 8, it can fundamentally prevent the explosion shock wave and flame from flowing back into the air conditioning unit 3 through the air supply duct.

[0035] In this embodiment, the vertical exhaust pipe 5, the first exhaust bend 7, the horizontal exhaust pipe 9, the second exhaust bend 10, and the outlet pipe 11 are all circular pipes, and the inner and outer walls of the vertical exhaust pipe 5, the first exhaust bend 7, the horizontal exhaust pipe 9, the second exhaust bend 10, and the outlet pipe 11 are all polished to a smooth finish. This makes it difficult for explosive powder to accumulate on the outer circumference of the outlet pipe 11. Furthermore, because the corners of the entire air supply duct are smoothly rounded without any dead angles, and the inner walls of the pipes are smooth, the accumulation of explosive dust inside the air supply duct can be effectively reduced. In addition, when the air conditioning unit 3 is restarted, the explosive dust inside the air supply duct can be easily blown out of the duct by the airflow.

[0036] In summary, the safety isolation air supply system for the explosion-proof room 1, through a series of interconnected and synergistic technical measures such as "bypass pipe protection structure", "installation of explosion-proof check valve 8 made of special material", "adoption of DC air conditioning unit" and "selection of circular air supply duct", constitutes a complete safety assurance system. This solution not only solves the core technical problem of air conditioning supply safety in the explosion-proof room 1, but also significantly reduces equipment investment through system optimization, achieving a balance between safety and economy.

[0037] Because the explosion-proof room's safety isolation air supply system effectively isolates the hazardous area, computer room 2 is considered a safe area, allowing the use of conventional non-explosion-proof air conditioning units. Compared to purchasing dedicated explosion-proof air conditioners or modifying ordinary units to be explosion-proof, the initial investment in equipment is significantly reduced.

[0038] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety isolation ventilation system for explosion-proof rooms, characterized in that, Includes an air conditioning unit (3) and an air supply duct. The air conditioning unit (3) is located in the machine room (2). The explosion-proof room (1) has three concrete walls and one explosion-proof wall (102). The machine room (2) is located on one side of any of the concrete walls of the explosion-proof room (1). One end of the air supply duct is connected to the air outlet of the air conditioning unit (3), and the other end passes through the explosion relief wall (102) and extends into the explosion-proof room (1). The explosion relief wall (102) is provided with a pressure relief window. An explosion-proof check valve (8) is installed on the air supply duct to control its opening and closing; The air conditioning unit (3) is a DC air conditioning unit.

2. A safety-segregated supply air system against explosions according to claim 1, characterized in that The explosion-proof check valve (8) is an explosion-proof check valve (8) made of non-sparking metal.

3. The explosion-proof room safety isolation air supply system according to claim 1, characterized in that, The air supply duct is a circular pipe with rounded corners and smooth inner and outer walls.

4. The explosion-proof room safety isolation air supply system according to claim 3, characterized in that, The concrete wall parallel to the explosion-proof room (1) and the explosion-proof wall (102) is a concrete side wall (101), and the machine room (2) is located on one side of the concrete side wall (101). The air supply duct includes an air outlet vertical pipe (5), a first air outlet bend (7), an air outlet horizontal pipe (9), a second air outlet bend (10), and an outlet pipe (11) connected in sequence. The first end of the air outlet vertical pipe (5) is connected to the air outlet of the air conditioning unit (3), and a fire damper (6) is installed between its second end and the first end of the first air outlet bend (7). The explosion-proof check valve (8) is installed between the first air outlet bend (7) and the air outlet horizontal pipe (9). The second outlet bend (10) passes through the explosion relief wall (102) at the end away from the outlet horizontal pipe (9), and the outlet pipe (11) is located inside the explosion-proof room (1).

5. A safety-segregated supply air system against explosions according to claim 4, characterized in that The top of the explosion-proof room (1) is equipped with multiple support seats (12) for supporting the air outlet horizontal pipe (9).

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