Explosion-proof valve device and protective airtight door

Abstract

An blast wave venting device, belonging to the technical field of protective equipment, includes: an outer frame; and a blast wave venting unit disposed within the outer frame. The blast wave venting unit includes a support body, on which a hinge is disposed. The hinge is positioned vertically relative to the support body and is hinged to the support body. When subjected to a shock wave, the hinge flips upwards and downwards, abutting against the outer frame to seal the ventilation channels at the top and bottom of the support body. Furthermore, this invention also provides a protective airtight door. In this invention, the hinge can flip upon impact with a shock wave, thereby cutting off the ventilation channels of the outer frame. Under normal conditions, the hinge can also open to allow ventilation channels to flow. The overall structure of this invention can be entirely composed of metal components, capable of withstanding bidirectional impacts while also possessing a long service life. After withstanding an impact, the hinge can automatically reset, achieving maintenance-free operation throughout its entire lifespan.

Description

Technical Field

[0001] This invention relates to the technical field of protective equipment, and more specifically, to an explosion-proof valve device and a protective airtight door. Background Technology

[0002] High-energy electromagnetic pulses can pose a serious threat to sensitive electronic and electrical equipment and systems within the project. To ensure the normal operation of electronic equipment and ventilation and water supply equipment inside the project, electromagnetic pulse protection measures must be taken.

[0003] For the main structure of the project, due to its thick walls or protective layers, the electromagnetic pulse energy penetrating the protective layer is very small. However, for the openings in the main structure, the protective structures at these openings are relatively weak, which easily leads to a reduction in their electromagnetic pulse protection capability. The openings in the main structure typically include ventilation openings for the ventilation and air conditioning system. In existing technology, blast wave dampers are installed on these ventilation openings to ensure the safety of personnel and equipment inside the project during blasting or impact loads, while also ensuring uninterrupted ventilation. The blast wave dampers can quickly and automatically close under the overpressure of the shock wave, blocking most of the shock wave outside the project. After the shock wave passes, the blast wave dampers can automatically reset in time, without affecting normal ventilation inside the project.

[0004] In existing technologies, explosion-proof valves are generally classified into two types: swing valves and hose valves. Swing valves can only be installed vertically, making them gravity-sensitive structures. The verticality of the installation directly affects their normal ventilation and wave-damping performance. Furthermore, swing valves are sensitive to the direction of the shock wave and cannot withstand bidirectional shock waves; they can only withstand forward shock waves and cannot withstand lateral or reverse shock waves. Hose valves are not heat-resistant, with an applicable temperature range of -34℃ to 40℃ and a maximum withstand temperature not exceeding 110℃. They cannot be installed in high-temperature environments such as smoke exhaust vents. In addition, hose valves suffer from problems such as easy aging, short lifespan (generally requiring replacement every 10 years), low resistance (shock wave overpressure design value less than 0.6MPa), sensitivity to the direction of the shock wave, inability to withstand bidirectional shock waves, and inability to withstand lateral or reverse shock waves. Summary of the Invention

[0005] (a) Technical issues

[0006] In summary, how to provide a novel explosion-proof wave valve that can withstand bidirectional impacts while also having a long service life has become a problem that urgently needs to be solved by those skilled in the art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This invention provides an explosion-proof wave valve device, which includes:

[0010] The outer frame is a cylindrical structure and has ventilation channels that allow for lateral ventilation.

[0011] An blast wave venting unit is disposed within the outer frame and located on the ventilation duct. The blast wave venting unit includes a support body, which includes a wave-facing surface and a wave-repellent surface. A hinge is disposed on the support body, on the wave-facing surface and the wave-repellent surface of the support body. The hinge is vertically disposed relative to the support body and is hinged to the support body.

[0012] When subjected to a shock wave, the hinge can flip upward and downward in the vertical direction. After flipping, the hinge can abut against the outer frame to seal the ventilation channels at the top and bottom of the support.

[0013] When not subjected to a shock wave, the two hinges on the same side tend to move relative to each other and separate from the outer frame, thereby opening up the ventilation channels in the upper and lower parts of the support.

[0014] Preferably, in the explosion-proof wave valve device provided by the present invention, the ventilation channel is a straight rectangular channel; the support body is located at the middle position in the length direction of the ventilation channel and at the middle position in the height direction of the ventilation channel; the hinge is a rigid structure, the hinge is a rectangular hinge, the two ends of the hinge are in sliding contact with the inner side of the ventilation channel, one side of the hinge is hinged to the support body, and the other side of the hinge is airtightly abutting against the upper or lower side of the ventilation channel.

[0015] Preferably, in the explosion-proof valve device provided by the present invention, the windward and leeward sides of the support body are provided with limiting bodies for supporting the hinge under normal conditions.

[0016] Preferably, in the explosion-proof wave valve device provided by the present invention, the limiting body is provided with a contact surface, the contact surface is an inclined surface, and the contact surface abuts against the hinge.

[0017] Preferably, in the explosion-proof wave valve device provided by the present invention, the hinge has a curved surface structure.

[0018] Preferably, in the explosion-proof wave valve device provided by the present invention, the hinge has a planar structure.

[0019] Preferably, in the explosion-proof valve device provided by the present invention, a flexible filter screen is provided on the side of the hinge that abuts against the ventilation channel, and filter holes are provided on the flexible filter screen.

[0020] Preferably, in the explosion-proof wave valve device provided by the present invention, the hinge is provided with a reinforcing frame.

[0021] Preferably, in the explosion-proof wave valve device provided by the present invention, a return spring is provided on the hinge, and the return spring is connected to the support body or the hinge on the same side.

[0022] Preferably, in the explosion-proof wave valve device provided by the present invention, the support body is elastically arranged in the ventilation channel along the airflow direction.

[0023] The present invention also provides a protective airtight door, including a door leaf, on which a ventilation valve mounting window is provided. The present invention further includes an anti-blast wave valve device as described above, wherein the anti-blast wave valve device is disposed on the ventilation valve mounting window.

[0024] (III) Beneficial Effects

[0025] As described above, the present invention provides a blast wave venting device, comprising: an outer frame, the outer frame being a cylindrical structure with a ventilation channel; a blast wave venting unit, the blast wave venting unit being disposed within the outer frame and located on the ventilation channel, the blast wave venting unit including a support body, the support body including a wave-facing surface and a wave-repellent surface, a hinge being disposed on the support body, the hinge being disposed on the wave-facing surface and the wave-repellent surface of the support body, the hinge being disposed vertically relative to the support body, the hinge being hinged to the support body; when subjected to a shock wave, the hinge flips upward and downward and abuts against the outer frame, thereby sealing the ventilation channel at the top and bottom of the support body; when not subjected to a shock wave, the two hinges disposed on the same side have a relative movement tendency and separate from the outer frame, thereby opening the ventilation channel at the top and bottom of the support body. In the blast wave vent device provided by this invention, a support body is provided within the outer frame, and a hinge is installed on the support body. The hinge can flip upon impact with a shock wave, thereby cutting off the ventilation channel of the outer frame. Furthermore, under normal conditions, the hinge can also be opened to allow the ventilation channel to open. The overall structure of this invention can be entirely composed of metal components, which can withstand bidirectional impacts while also possessing a long service life. After withstanding an impact, the hinge can automatically reset, achieving maintenance-free operation throughout its entire lifespan. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0027] Figure 1 This is a simplified structural diagram of the explosion-proof wave valve device in an embodiment of the present invention;

[0028] Figure 2 This is a simplified schematic diagram of the explosion-proof wave valve device after the hinge structure has been modified in an embodiment of the present invention;

[0029] Figure 3 This is a simplified schematic diagram of the structure of the explosion-proof wave valve device after one side of the hinge flips and closes in an embodiment of the present invention;

[0030] Figure 4 This is a simplified schematic diagram of the assembly structure between the support body and the outer frame in one embodiment of the present invention;

[0031] Figure 5 This is a simplified schematic diagram of the assembly structure between the support body and the outer frame in another embodiment of the present invention.

[0032] exist Figure 1 The image shows the length, width, and height directions, as well as the impact direction of the shock wave.

[0033] exist Figure 1 The diagram shows the structures of two types of return springs, located on the left and right sides of the support body, respectively.

[0034] exist Figures 1 to 5 In the diagram, the correspondence between component names and reference numerals is as follows:

[0035] 1. Outer frame; 2. Support body; 3. Hinge; 4. Return spring; 5. Limiting body. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0037] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," 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 the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0038] Please refer to Figures 1 to 5 This invention provides an blast wave venting device, which is installed on the ventilation vent of a protective airtight door to enable ventilation (gas exchange) and to close promptly upon impact by a shock wave. In this invention, the blast wave venting device mainly comprises two parts: 1. an outer frame 1; 2. a blast wave venting unit.

[0039] The outer frame 1 is the skeleton structure of the blast wave valve device, and it is made of metal material (stainless steel sheet or aluminum alloy profile). The outer frame 1 can be formed by bending a single metal sheet or assembled from multiple metal components. In one embodiment of the present invention, the outer frame 1 is a cylindrical structure, specifically, it can be a rectangular cylindrical structure or a circular cylindrical structure. The outer frame 1 is preferably a rectangular cylindrical structure, which allows for adjustment of the number of blast wave valve devices installed within the ventilation valve installation window when the ventilation valve installation window is designed as a rectangular window. For example, when only one blast wave valve device is installed, the outer frame 1 of the blast wave valve device is adapted to the shape of the ventilation valve installation window and can completely fill the ventilation valve installation window. When multiple blast wave ventilators need to be installed in a single ventilation valve installation window, such as two, the width of the outer frame 1 of the blast wave ventilator should be consistent with the width of the ventilation valve installation window. However, the height of the ventilation valve installation window should be at least twice the height of the outer frame 1. This allows two blast wave ventilators to be installed in one ventilation valve installation window (the two blast wave ventilators are arranged in a row along the height). When multiple blast wave ventilators are installed in a ventilation valve installation window, sealing strips or sealing plates need to be installed between adjacent blast wave ventilators and between the blast wave ventilators and the ventilation valve installation window to ensure that ventilation in the ventilation valve installation window can only be achieved through the blast wave ventilators. When the outer frame 1 is a circular cylindrical structure, a blast wave venting device is preferably installed on a ventilation valve installation window. That is, the ventilation valve installation window is designed as a circular window structure, and the shape of the outer frame 1 of the blast wave venting device matches the shape of the ventilation valve installation window. The outer frame 1 is installed on the ventilation valve installation window and a sealing strip or sealing plate is provided. Based on this structural design, multiple ventilation valve installation windows can be installed on the protective airtight door to ensure ventilation volume.

[0040] When the outer frame 1 is installed on the ventilation valve mounting window, a sealing strip or sealing plate needs to be installed to achieve a seal between the outer frame 1 and the ventilation valve mounting window, or between the outer frames 1 themselves. Airflow can only pass through the explosion-proof valve device. The outer frame 1 has a ventilation channel for gas flow; specifically, the outer frame 1 has a ventilation channel capable of lateral ventilation, meaning the ventilation channel is primarily for lateral airflow. In this invention, when the outer frame 1 is a rectangular cylindrical structure, the ventilation channel is a rectangular channel structure; when the outer frame 1 is a circular cylindrical structure, the ventilation channel is a circular channel structure.

[0041] The blast wave valve unit is a component installed inside the outer frame 1. Its overall outline shape is designed according to the ventilation channel of the outer frame 1, with the design standard being that it can be installed inside the ventilation channel and can realize the opening and closing of the ventilation channel (mainly the design of the hinge 3 of the blast wave valve unit).

[0042] The blast wave valve unit is fixedly installed inside the outer frame 1 and located on the ventilation channel. Since the blast wave valve unit is mainly designed to withstand the impact of external shock waves, it is positioned close to the inner end of the ventilation channel on the outer frame 1 in the direction from the outside to the inside (for airtight protective doors, from the outside to the inside). This way, when subjected to a shock wave, the shock wave will pass through a longer ventilation channel before impacting the blast wave valve unit, thus reducing the impact energy.

[0043] In this invention, the structure of the blast wave vent unit is as follows: it includes a support body 2, which is a rod-shaped structure. Its cross-section is preferably rectangular or square, but can also be circular or elliptical. The support body 2 is made of solid metal profiles and adopts an integrated structural design, which improves the structural strength of the support body 2 and meets the requirements of high-explosive impact and the reliability of hinge 3 installation. The support body 2 includes a wave-facing surface (the side facing outwards in the actual installation state) and a wave-rear surface (the side facing inwards in the actual installation state). This invention provides a hinge 3 on the support body 2, which is located on both the wave-facing and wave-rear surfaces of the support body 2. The hinge 3 is positioned vertically relative to the support body 2 and is hinged to it. Specifically, the hinge 3 has a rolled edge structure on one side for hinged to the support 2 to form a circular hole structure. A corresponding circular hole is provided on the support 2. The hinge shaft is set through the hinge 3 and the circular hole structure on the support 2, thereby realizing the hinge between the hinge 3 and the support 2. Its structure is similar to the hinge structure in the prior art.

[0044] Depending on the installation position of the hinge 3 on the support 2, the hinge 3 can be divided into four types, installed on the upper edge of the wave-facing side, the lower edge of the wave-facing side, the upper edge of the back wave side, and the lower edge of the back wave side, respectively. When installed inside the ventilation channel in the support 2, the four types of hinge 3 can be flipped to abut against the inner side of the ventilation channel, thereby cutting off the ventilation channel.

[0045] Specifically, for the two types of hinges 3 located above and below the wave-facing surface, when subjected to a frontal shock wave (i.e., a shock wave towards the wave-facing surface), the hinge 3 located on the upper side of the wave-facing surface can flip upwards, and the hinge 3 located on the lower side of the wave-facing surface can flip downwards. After flipping, the hinge 3 can abut against the outer frame 1 (i.e., against the inner wall of the ventilation channel), thereby sealing the ventilation channels at the top and bottom of the support body 2. For the two types of hinges 3 located above and below the back wave surface, when subjected to a back shock wave (i.e., a shock wave towards the back wave surface), the hinge 3 located on the upper side of the back wave surface can flip upwards, and the hinge 3 located on the lower side of the back wave surface can flip downwards. After flipping, the hinge 3 can abut against the outer frame 1 (i.e., against the inner wall of the ventilation channel), thereby sealing the ventilation channels at the top and bottom of the support body 2.

[0046] When subjected to a shock wave, hinge 3 can flip vertically upwards and downwards, and after flipping, hinge 3 can abut against the outer frame. Hinges 3 located on the upper part of the support 2 flip upwards when impacted by a shock wave (and downwards upon resetting), while hinges 3 located on the lower part of the support 2 flip downwards when impacted by a shock wave (and upwards upon resetting). For the same ventilation channel, both hinges need to flip simultaneously to seal the ventilation channel.

[0047] It should be noted that the two ends of the hinge 3 (the two ends in the horizontal direction) abut against the ventilation channel and can slide relative to the ventilation channel, thus achieving the sealing of the two ends of the hinge 3. Furthermore, the present invention provides a concave fan-shaped groove structure in the ventilation channel corresponding to the movement trajectory of the hinge 3. The two ends of the hinge 3 extend into the interior of the fan-shaped groove structure, and the two ends of the hinge 3 abut against the bottom (vertical) surface of the fan-shaped groove structure and can slide relative to it, which can further improve the sealing of the two ends of the hinge 3.

[0048] Regarding the structure of Loose-leaf 3, it is designed according to the shape of the ventilation channel. For example, when the ventilation channel is rectangular, Loose-leaf 3 adopts a rectangular structure; when the ventilation channel is circular or elliptical, Loose-leaf 3 adopts a semi-circular or semi-elliptical structure. The specific design standard for the shape of Loose-leaf 3 is that after being impacted by a shock wave, it can abut against the inner surface of the ventilation channel to seal it (upper or lower ventilation channel). Furthermore, when Loose-leaf 3 is impacted by a shock wave, the angle between Loose-leaf 3 and the horizontal plane should ideally be between 40° and 50° after flipping, and at this time, Loose-leaf 3 can abut against the inner surface of the ventilation channel to seal it.

[0049] In this invention, when not subjected to a shock wave, the two hinges 3 on the same side tend to move relative to each other and separate from the outer frame 1, thus opening the ventilation channels in the upper and lower parts of the support body 2. Under normal conditions (i.e., when not subjected to a shock wave), the hinges 3 should separate from the ventilation channels to ensure their continuity; therefore, the hinges 3 need to have a tendency to return to their normal position. Specifically, this invention provides a return spring 4 on the hinges 3, which is connected to the support body 2 or the hinge 3 on the same side. The return spring 4 can be a common spring (a long, straight cylindrical spring). When the return spring 4 is a common spring, one end of the return spring 4 is connected to the hinge 3, and the other end is connected to the other hinge 3 on the same side. This allows the return spring 4 to apply tension to the two hinges 3, causing them to flip towards the center. Alternatively, the return spring 4 can also be a compression spring. The compression spring is located between the hinge 3 and the support body 2. When the hinge 3 flips from its normal state, it can apply pressure to the compression spring to deform it. After the shock wave, the compression spring returns to its normal state and pushes the hinge 3 back to its normal state.

[0050] In this invention, the hinge 3 can be an integral structure or a split structure, that is, the hinge 3 includes at least two hinge 3 units, and the two hinge 3 units are arranged in a stacked manner along the width direction of the ventilation channel (that is, the adjacent sides of two adjacent hinge 3 units overlap).

[0051] On a horizontal plane, the airflow direction of the ventilation duct is along its length, perpendicular to the length direction is the width direction, and vertically is the height direction. In a specific embodiment of the invention, the ventilation duct is a straight rectangular duct, meaning it is straight along its length and rectangular in its height direction. The support 2 is positioned at the midpoint of the ventilation duct's length and height. The hinge 3 is a rigid structure, preferably a metal hinge 3, such as a stainless steel hinge 3 or an aluminum profile hinge 3. When the ventilation duct is a straight rectangular duct, the hinge 3 is a rectangular hinge 3. The two ends of the hinge 3 (i.e., the two ends in the width direction of the ventilation duct) are in sliding contact with the inner side of the ventilation duct (the two inner walls in the width direction of the ventilation duct). One side of the hinge 3 is hinged to the support 2, and the other side of the hinge 3 is airtightly abutted against the upper or lower side of the ventilation duct.

[0052] As another structural improvement of this invention, the support body 2 is provided with limiting bodies 5 on both the windward and leeward sides to support the hinge 3 in its normal state, thus keeping the hinge 3 in its normal position. Simultaneously, when a return spring 4 is provided, the limiting bodies 5 can also limit the return flipping of the hinge 3, preventing the hinge 3 from over-flipping (flipping the hinge 3 to a horizontal or near-horizontal position) and failing to intercept the shock wave. Specifically, the limiting body is provided with a contact surface, which is an inclined surface (maintaining an angle of 40° to 50° with the horizontal plane). The contact surface abuts against the hinge 3, thus allowing the hinge 3 to maintain its normal position (maintaining an angle of 40° to 50° with the horizontal plane).

[0053] In this invention, the outline shape of the hinge 3 is designed according to the shape (cross-sectional shape) of the ventilation channel. The overall structure of the hinge 3 can be a flat structure or a curved structure. When the hinge 3 adopts a curved structure design, the bending direction of the hinge 3 is: concave towards the port of the ventilation channel, that is, when viewed from the port of the ventilation channel, the hinge 3 facing the port is a curved structure that bulges forward (towards the other port). With the curved structure design, when subjected to the impact of a shock wave, the increased area of ​​the hinge 3 allows it to more stably abut against the inner surface of the ventilation channel, thus achieving the interruption of the ventilation channel. At the same time, under normal conditions, airflow can flow through the curved surface of the hinge 3, and the influence of the hinge 3 on the airflow can be reduced.

[0054] Under normal conditions, there is a gap between the hinge 3 and the inner wall of the ventilation channel to allow airflow (ensuring unimpeded exchange of internal and external gases). To achieve gas filtration, this invention provides a flexible filter screen on the side of the hinge 3 that abuts against the ventilation channel. The flexible filter screen has filter holes, so that the airflow passing through the hinge 3 is filtered by the filter screen. The filter screen has a certain degree of flexibility (or is slightly longer) to ensure that the hinge 3 can flip smoothly.

[0055] To prevent the ventilation channel from failing to close due to deformation of the hinge 3 when subjected to shock waves, the present invention provides a reinforcing frame on the hinge 3. The reinforcing frame is a metal strip and can be set on the back of the hinge 3 in a mesh structure.

[0056] As another key improvement of this invention, the following optimized design is proposed: the support body 2 is elastically arranged within the ventilation channel along the airflow direction. Specifically, elongated holes are formed on two side walls in the width direction of the ventilation channel, and these holes are horizontally arranged along the length direction of the ventilation channel. A slider is installed within the elongated hole, and a baffle is installed on the outside of the outer frame 1, covering the elongated hole. This ensures that the slider slides smoothly within the elongated hole while also sealing it. Springs are installed on both sides of the slider in the sliding direction, allowing the slider to slide elastically within the elongated hole. The two ends of the support body 2 are fixedly connected to the slider. In this way, the entire blast wave valve unit can move elastically within the outer frame 1, buffering the impact of the shock wave. Furthermore, the elongated hole can be designed as a rectangular window, and the slider adopts a rectangular block structure. Springs are installed at each of the four corners of the slider, and these springs are connected to the four corners of the rectangular window. This allows the slider to move in a two-dimensional direction within the rectangular window (i.e., the slider can move elastically within the vertical surface formed by the rectangular window). This allows the support body 2 to move and be closed by the other hinge 3 on the same side if one hinge 3 fails to close. In this embodiment, the height of the hinge 3 is not less than the height of the ventilation channel. That is, when one hinge 3 on the same side closes, the downward force of the hinge 3 against the outer frame 1 drives the support body 2 to move until the support body 2 abuts against the inner side of the outer frame 1. At this point, the ventilation channel can be cut off by a single hinge 3.

[0057] Based on the aforementioned blast wave venting device, the present invention also provides a protective airtight door, including a door leaf with a ventilation vent mounting window on the door leaf. The present invention further includes the aforementioned blast wave venting device, which is disposed on the ventilation vent mounting window. The number of blast wave venting devices installed within the ventilation vent mounting window is adjustable.

[0058] As described above, the present invention provides a blast wave venting device. In this invention, the blast wave venting device includes: an outer frame 1, which is a cylindrical structure and has a ventilation channel; and a blast wave venting unit, which is disposed within the outer frame 1 and located on the ventilation channel. The blast wave venting unit includes a support body 2, which includes a wave-facing surface and a wave-rear surface. A hinge 3 is disposed on the support body 2, on both the wave-facing and wave-rear surfaces. The hinge 3 is vertically positioned relative to the support body 2 and is hinged to it. When subjected to a shock wave, the hinge 3 flips upwards and downwards and abuts against the outer frame 1, thereby sealing the upper and lower ventilation channels of the support body 2. When not subjected to a shock wave, the two hinges on the same side have a relative movement tendency and separate from the outer frame 1, thereby opening the upper and lower ventilation channels of the support body 2.

[0059] Through the above structural design, in the blast wave vent device provided by this invention, a support body 2 is set inside the outer frame 1, and a hinge 3 is installed on the support body 2. The hinge 3 can be flipped under the impact of a shock wave, thereby cutting off the ventilation channel of the outer frame 1. In addition, under normal conditions, the hinge 3 can also be opened to allow the ventilation channel to open. The overall structure of this invention can be composed entirely of metal components, which can withstand bidirectional impacts and also has a long service life. After being impacted, the hinge 3 can also automatically reset, achieving maintenance-free operation throughout its entire lifespan.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A blast-proof wave valve device, characterized in that, include: The outer frame is a cylindrical structure and has ventilation channels that allow for lateral ventilation. An blast wave venting unit is disposed within the outer frame and located on the ventilation duct. The blast wave venting unit includes a support body, which includes a wave-facing surface and a wave-repellent surface. A hinge is disposed on the support body, on the wave-facing surface and the wave-repellent surface of the support body. The hinge is vertically disposed relative to the support body and is hinged to the support body. When subjected to a shock wave, the hinge can flip upward and downward in the vertical direction. After flipping, the hinge can abut against the outer frame to seal the ventilation channels at the top and bottom of the support. When not subjected to a shock wave, the two hinges on the same side tend to move relative to each other and separate from the outer frame, thereby opening the ventilation channels at the top and bottom of the support. The hinge is provided with a return spring, and the return spring is connected to the support or the hinge on the same side; The support body is elastically arranged in the ventilation channel along the airflow direction. Elongated holes are opened on two side walls in the width direction of the ventilation channel. The elongated holes are horizontally arranged along the length direction of the ventilation channel. A slider is arranged in the elongated hole. A baffle is arranged on the outside of the outer frame, covering the elongated hole. Springs are arranged on both sides of the slider in the sliding direction of the slider, so that the slider can slide elastically in the elongated hole. The two ends of the support body are fixedly connected to the slider, and the explosion-proof valve unit can move elastically within the outer frame.

2. The explosion-proof wave valve device according to claim 1, characterized in that, The ventilation duct is a straight rectangular duct; The support is located at the middle position along the length of the ventilation channel and at the middle position along the height of the ventilation channel; The hinge is a rigid structure and is rectangular. Both ends of the hinge are in sliding contact with the inner side of the ventilation channel. One side of the hinge is hinged to the support body, and the other side of the hinge is airtightly abutted against the upper or lower side of the ventilation channel.

3. The explosion-proof wave valve device according to claim 2, characterized in that, Both the windward and leeward sides of the support are provided with limiting elements for supporting the hinges under normal conditions.

4. The explosion-proof wave valve device according to claim 3, characterized in that, The limiting body is provided with a contact surface, which is an inclined surface, and the contact surface abuts against the hinge.

5. The explosion-proof wave valve device according to claim 1, characterized in that, The hinge has a curved surface structure; Alternatively, the hinge may have a planar structure.

6. The explosion-proof wave valve device according to claim 5, characterized in that, A flexible filter screen is provided on the side of the hinge that is used to abut against the ventilation channel, and filter holes are provided on the flexible filter screen.

7. The explosion-proof wave valve device according to claim 1, characterized in that, The hinge is equipped with a reinforcing skeleton.

8. A protective airtight door, comprising a door leaf, wherein a ventilation hatch installation window is provided on the door leaf, characterized in that, It also includes an explosion-proof valve device as described in any one of claims 1 to 7, wherein the explosion-proof valve device is disposed on the ventilation valve mounting window.

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