Door-type assembled shielding valve capable of absorbing waves and preventing explosion waves in two directions

Abstract

A door-type assembly type bidirectional wave-absorbing and explosion-proof shielding valve belongs to the related technical field of protective equipment and comprises an assembly unit, the assembly unit comprises a valve body, a ventilation channel is arranged on the valve body, a valve cavity is arranged in the middle of the ventilation channel, an opening structure, communicated with the ventilation channel, of the valve cavity is a valve cavity air opening, a valve element is arranged in the valve cavity, and the valve element is arranged in the valve cavity. The valve element can elastically move in the airflow flowing direction, and the valve element can block the valve cavity air opening in front of the valve element in the airflow flowing direction so that airflow of the ventilation channel can be stopped. On the basis that the ventilation performance is guaranteed, the wave absorbing device has the remarkable performance advantage in the wave absorbing performance. According to the bidirectional wave absorbing valve, closing is achieved through shock waves and resetting is achieved through the spring device in principle, the valve element can move and reset in the front-back direction, impact airflow on the two sides of the door leaf can be effectively stopped, and the bidirectional wave absorbing effect is achieved; the problem that in the prior art, a dangling type valve and a rubber pipe type valve cannot bear shock waves in the two directions is solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to protective equipment, and more specifically, to a door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve. Background Art

[0002] During a nuclear explosion, when electromagnetic pulse energy enters the protective engineering through various coupling pathways, it will pose a serious threat to sensitive electronic and electrical equipment and systems in the fortifications. Therefore, the protective engineering must be designed for electromagnetic pulse protection. Electromagnetic pulse protection mainly controls the electromagnetic field energy entering the electronic system. In order to ensure the normal operation and operation of the electronic equipment and wind, water and electricity equipment inside the project and to ensure the uninterrupted combat command, it is necessary to study the measures to prevent the electromagnetic pulse effects of the project.

[0003] For the main body of the project, due to its thick protective layer, the energy of the electromagnetic pulse that enters the main body through the protective layer is very small. As for the opening structure opened on the main body of the project, the protective structure set at the opening is relatively weak, resulting in its weak protection against electromagnetic pulses. The opening structure opened on the main body of the project generally includes the vents set by the ventilation and air-conditioning system. In the prior art, explosion-proof valves are set on the vents to ensure the safety of personnel and equipment inside the project and uninterrupted ventilation of the project when subjected to explosions or impact loads. The explosion-proof valve can be closed quickly and automatically under the action of the overpressure of the shock wave, blocking most of the shock wave outside the project. After the shock wave, the explosion-proof valve can be automatically reset in time without affecting the normal ventilation inside the project.

[0004] In the prior art, explosion-proof valves can generally be divided into two types: pendulum valves and hose valves. For pendulum valves, they can only be installed vertically and are gravity-sensitive structures. The verticality of the installation will directly affect their normal ventilation and wave-absorbing performance. In addition, pendulum valves are sensitive to the direction of shock waves and cannot bear bidirectional shock waves. They can only withstand forward shock waves and cannot bear shock waves laterally or in reverse. For hose valves, they are not resistant to high temperatures. The applicable temperature is -34°C to 40°C. The maximum temperature they can withstand cannot be higher than 110°C. They cannot be installed in high-temperature places such as smoke exhaust ports. In addition, hose valves also have the problems of easy aging and short life (generally need to be replaced every 10 years), low resistance to shock waves, and overpressure design value less than 0.6MPa, and they are sensitive to the direction of shock waves. They cannot bear shock waves in both directions and can only withstand forward shock waves. They cannot bear shock waves laterally or in reverse. Summary of the invention

[0005] 1. Technical issues

[0006] In summary, how to provide a bidirectional explosion-proof wave shielding valve that can absorb waves in order to solve the problem that the swing-type valve and hose-type valve in the prior art cannot bear shock waves in both directions has become an urgent problem to be solved by technical personnel in this field.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] The present invention provides a door-type assembled bidirectional wave-absorbing explosion-proof wave shielding valve. In the present invention, the door-type assembled bidirectional wave-absorbing explosion-proof wave shielding valve comprises:

[0010] An assembled explosion-proof wave valve assembly, the assembled explosion-proof wave valve assembly includes an assembly unit, the assembly unit includes a valve body, the valve body is provided with a ventilation channel, a valve cavity is provided in the middle of the ventilation channel, the mouth structure of the valve cavity communicating with the ventilation channel is a valve cavity air port, a valve core is provided in the valve cavity, the valve core can be elastically movable along the direction of airflow, and the valve core can block the valve cavity air port in front of it along the direction of airflow to achieve airflow cutoff of the ventilation channel.

[0011] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve provided by the present invention, the valve body includes an upper valve body plate and a lower valve body plate, the upper valve body plate and the lower valve body plate are spaced apart from each other and form a single-sided ventilation duct structure, two of the single-sided ventilation duct structures are provided, and the two single-sided ventilation duct structures are spaced apart from each other front to back, and the valve core is provided between the two single-sided ventilation duct structures and can be offset against the front or rear side to achieve airflow cutoff of the ventilation channel.

[0012] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve provided by the present invention, in the same assembled explosion-proof valve assembly, a plurality of valve bodies are provided, and the valve bodies can be arranged in the vertical direction to form a parallel structure, or the valve bodies can be arranged in the front-to-back direction to form a series structure.

[0013] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve provided by the present invention, in the parallel structure of the valve bodies, adjacent valve bodies are arranged at intervals, and sealing plates are provided between adjacent valve bodies to achieve the sealing of the intervals between the valve bodies.

[0014] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve provided by the present invention, two side end plates are arranged along the axial direction of the valve core, the valve body is fixedly arranged on the two side end plates, and the valve core is movably arranged on the two side end plates.

[0015] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve provided by the present invention, sliding holes are provided on the end plates on both sides, and the ends of the valve core can be movably arranged in the sliding holes.

[0016] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve provided by the present invention, the valve core can be elastically and movably arranged on the valve body through an elastic component; the elastic component includes a main shaft, an axial hole is provided at the end of the valve core, the valve core is assembled on the main shaft through the axial hole, a spring is sleeved on the main shaft, the spring is separately arranged at the two ends of the outer side of the valve core, and the spring is elastically in contact with the valve core; or, the elastic component includes a main shaft, an axial hole is provided at the end of the valve core, the valve core is assembled on the main shaft through the axial hole, a spring is sleeved on the main shaft, the spring is fixedly arranged relative to the main shaft, the spring is located inside the valve core and can elastically contact with the inner side wall of the valve core; or, the elastic component includes a U-shaped spring, one side of the U-shaped spring is a fixed side, the fixed side is fixedly arranged relative to the valve body, the other side of the U-shaped spring is an elastically movable side, the elastic range of the elastically movable side is not less than the motion limit of the valve core, and the elastically movable side is against the valve core.

[0017] Preferably, the door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve provided by the present invention also includes upper and lower end plates, which are fixedly arranged with the two side end plates to form an assembly unit outer frame, and at least one valve body is arranged in the assembly unit outer frame; the assembled explosion-proof valve assembly includes at least one group of assembly units.

[0018] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve provided by the present invention, the door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve includes a door leaf, a ventilation hole is arranged on the door leaf, the assembled explosion-proof valve assembly is adjustable in number on the ventilation hole, and the assembled explosion-proof valve assembly is arranged on the door leaf through a valve body mounting frame.

[0019] Preferably, in the door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve provided by the present invention, the door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve includes a door frame, and the door leaf is hinged to the door frame; a conductive sealing structure is provided on the door frame, and the door leaf is airtightly closed to the door frame through the conductive sealing structure.

[0020] (III) Beneficial effects

[0021] As can be seen from the above, the present invention provides a door-type assembled bidirectional wave-absorbing explosion-proof shielding valve, which includes: an assembled explosion-proof valve assembly, the assembled explosion-proof valve assembly includes an assembly unit, the assembly unit includes a valve body, a ventilation channel is arranged on the valve body, a valve cavity is arranged in the middle of the ventilation channel, the mouth structure of the valve cavity and the ventilation channel is a valve cavity air port, a valve core is arranged in the valve cavity, the valve core can be elastically movable along the direction of air flow, and the valve core can block the valve cavity air port in front of it along the direction of air flow to achieve air flow cutoff of the ventilation channel. The present invention has developed and provided a new assembled explosion-proof valve, which adopts a brand-new wave-absorbing structure, and has significant performance advantages in wave-absorbing performance on the basis of ensuring ventilation performance. Through the comparison of the resistance performance and wave absorbing performance under the action of the shock wave of a simulated nuclear explosion, the pressure peak wave absorbing rate of the finalized product ZH200 (5) under the nuclear 5 resistance level can be increased from 39.2% to 91%, and the energy wave absorbing rate can be increased from 84.1% to 97.2%. Under this technical index, the diffusion chamber or the wave absorbing chamber can be eliminated, and the residual pressure directly after the wave absorbing of the equipment meets the protection requirements of the equipment and personnel. According to the test, the equivalent ventilation diameter of a finalized product of the present invention is 195mm, and its ventilation local resistance coefficient is 3.5, which is better than the local resistance coefficient of the hose valve 6.46 and the local resistance coefficient of HK200 (5) 4.08. The ratio of its ventilation area to the installation area is 28.7%, which is better than the hose valve 19.5% and close to the 31.2% of HK200 (5). In addition, the present invention relies on the shock wave to close and the spring device to reset in principle, and can be installed at any angle. Compared with the swing valve that relies on gravity to reset and can only be installed vertically, the present invention has better reliability and applicability. At the same time, the valve core in the present invention can move and reset in both directions, and can effectively cut off the impact airflow on both sides of the door leaf, achieving the effect of two-way wave elimination. The present invention solves the problem of the swing valve and hose valve in the prior art that they cannot bear the impact wave in both directions. In addition, the present invention adopts an all-metal structure, and compared with the sealing strips of hoses and swing valves, it does not have the problem of aging and high temperature resistance, and can achieve the requirement of maintenance-free during the use period. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0023] Figure 1 It is a structural schematic diagram of a component unit installed on a door leaf in an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a component unit in an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the longitudinal cross-sectional structure of a component unit in an embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the transverse cross-sectional structure of a component unit in an embodiment of the present invention.

[0027] exist Figures 1 to 4 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0028] Valve body 1, upper valve body plate 1a, lower valve body plate 1b, ventilation channel 2, valve cavity 3, valve core 4, sealing plate 5, two side end plates 6, sliding hole 7, elastic component 8, upper and lower end plates 9. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0030] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] Please refer to Figures 1 to 4 ,in, Figure 1 It is a structural schematic diagram of the component unit installed on the door leaf in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a component unit in an embodiment of the present invention; Figure 3 is a schematic diagram of the longitudinal cross-sectional structure of a component unit in an embodiment of the present invention; Figure 4 It is a schematic diagram of the transverse cross-sectional structure of a component unit in an embodiment of the present invention.

[0032] The present invention provides a door-type assembled bidirectional wave-absorbing explosion-proof wave shielding valve, which includes a door frame (the door frame is provided with a threshold, which can be a fixed threshold or a movable threshold) and a door leaf, the door frame is a steel door frame (that is, the door frame is made of steel), the door frame can be fixedly set at the building opening by pre-buried anchor bolts or expansion bolts, the door frame is provided with a door frame edge (the door frame edge covers the building opening), the door leaf can be installed on the door frame edge by a hinge assembly, and can form an airtight closed structure with the door frame edge after the door leaf is closed. An assembled explosion-proof wave valve assembly is arranged on the door leaf, and the "assembled" in the assembled explosion-proof wave valve assembly means that the valve assembly is assembled from component units, and multiple valve assemblies can be assembled on one door leaf.

[0033] Specifically, the assembled explosion-proof valve assembly includes an assembly unit, and one assembly unit is equivalent to a "valve" structure, which can independently realize airflow conduction and cutoff. The assembly unit includes a valve body 1. In the present invention, the valve body 1 is an assembled valve body structure, and the valve body 1 is assembled from a plurality of parts (all metal components). A ventilation channel 2 is arranged on the valve body 1. The ventilation channel 2 is a flat, long and straight ventilation channel (which can be understood as a long, straight, slit structure with a certain height dimension). A valve cavity 3 is arranged in the middle of the ventilation channel 2 (the depth direction of the ventilation channel 2 along the airflow direction, which refers to the middle of the depth direction of the ventilation channel 2). The valve cavity 3 can be understood as a cavity structure that allows the valve core 4 to move, which is a part of the ventilation channel 2, but the valve cavity 3 divides a complete ventilation channel 2 into two parts (two single-sided ventilation ducts), namely the front ventilation channel and the rear ventilation channel. In order to facilitate the structural description, it is defined here that the mouth structure where the valve cavity 3 communicates with the ventilation channel 2 is the valve cavity air port. The present invention provides a valve core 4 in the valve cavity 3, and the length of the valve core 4 is greater than the width of the ventilation channel 2 (the axial direction of the valve core 4 is the width direction of the ventilation channel 2), so that the valve core 4 can effectively block the air outlet of the valve cavity and close the ventilation channel 2. The valve core 4 can move elastically along the flow direction of the airflow, and the valve core 4 can block the air outlet of the valve cavity in front of it along the flow direction of the airflow to cut off the airflow of the ventilation channel 2.

[0034] In a specific embodiment of the present invention, the valve body 1 is assembled by using a plurality of metal components. Specifically, the valve body 1 includes an upper valve body plate 1a and a lower valve body plate 1b. In actual use, the upper valve body plate 1a is located above the lower valve body plate 1b, and the opposing surfaces between the upper valve body plate 1a and the lower valve body plate 1b are planes, so that the airflow can flow stably and smoothly under normal conditions (non-explosion shock wave impact conditions). The upper valve body plate 1a and the lower valve body plate 1b are spaced apart from each other and form a single-sided ventilation duct structure. Two single-sided ventilation duct structures (specifically, an upper valve body plate 1a and a corresponding lower valve body plate 1b) are provided. The two single-sided ventilation duct structures are spaced apart front and back (the front and back spacing refers to the front and back spacing in the depth direction of the ventilation channel 2) and form a valve cavity 3. The two single-sided ventilation duct structures form a complete ventilation channel 2. The valve core 4 is arranged between the two single-sided ventilation duct structures and can be offset against the single-sided ventilation duct structure on the front or rear side to achieve airflow cutoff of the ventilation channel 2.

[0035] In the present invention, the valve core 4 is a long straight round rod structure (a round hollow metal tube), and the surface of the part located in the ventilation channel 2 is a streamlined surface structure. Preferably, the part of the valve core 4 located in the ventilation channel 2 is a cylindrical structure, so that the valve core 4 is arranged in the valve cavity 3, and the valve core 4 will not cause too much interference to the flow of airflow in a normal state. At the same time, when encountering an explosion or the like, the explosion impact will also have a strong driving effect on the valve core 4, so that the valve core 4 moves forward with the airflow to block the valve cavity air port in front of it, completing the airflow cutoff action. After the impact disappears or weakens, the airflow returns to the normal state, and the valve core 4 can automatically reset to achieve airflow conduction.

[0036] In the same assembled explosion-proof valve assembly, multiple valve bodies 1 are provided, and the valve bodies 1 can be arranged in the vertical direction to form a parallel structure (each valve body 1 is equivalent to a valve that can achieve airflow cutoff), or the valve bodies 1 can be arranged in the front-to-back direction to form a series structure (two or more valve bodies 1 in series jointly complete the conduction or cutoff of the airflow).

[0037] Furthermore, in the parallel structure of the valve bodies 1, a plurality of valve bodies 1 are arranged in a vertical direction, and adjacent valve bodies 1 are spaced apart (the spacing can ensure smooth movement of the valve core 4), and sealing plates 5 are provided between adjacent valve bodies 1 for sealing the intervals between the valve bodies 1. The sealing plates 5 form an integrated structure with the lower valve body plate 1b of the previous valve body 1 and the upper valve body plate 1a of the next valve body 1 (the whole is a plate member with a U-shaped cross-section).

[0038] In the present invention, the component unit includes a valve body 1 and a valve core 4. In order to realize the assembly of the valve body 1 and the valve core 4, the present invention is also provided with a corresponding frame structure, through which a component unit can form a component with complete ventilation function. For example, the present invention is provided with two side end plates 6 along the axial direction of the valve core 4, and the two side end plates 6 are made of metal sheet components. The valve body 1 is fixedly provided on the two side end plates 6, and the valve core 4 is movably provided on the two side end plates 6 (sliding holes 7 are provided on the two side end plates 6, and the end of the valve core 4 can be slidably installed in the sliding holes 7). Of course, the present invention can also be provided with some limiting devices or limiting structures to limit the movement of the valve core 4. Slide holes 7 are provided on the end plates 6 on both sides. The slide holes 7 are long straight holes. The width (or height) of the slide holes 7 is consistent with the width (or diameter) of the end of the valve core 4 (so that the valve core 4 cannot move up and down). At the same time, the slide hole 7 also has a certain length (i.e., the depth direction of the ventilation channel 2 on the valve body 1) to allow the valve core 4 to achieve a complete sliding (the so-called complete sliding means that the valve core 4 can move forward to block the valve cavity air port in front of it, and the valve core 4 can move backward to block the valve cavity air port behind it). The end of the valve core 4 is movably arranged in the slide hole 7. In the present invention, the end of the valve core 4 can be circular or rectangular.

[0039] In the present invention, the valve core 4 is elastically and movably arranged on the valve body 1 through the elastic component 8, and the elastic component 8 has the following three structures:

[0040] Structure 1: The elastic component 8 includes a main shaft (long straight shaft), an axial hole is provided at the end of the valve core 4, the axis of the main shaft is parallel and perpendicular to the axis of the valve core 4, the valve core 4 is assembled on the main shaft through the axial hole, and there are two main shafts, which are respectively arranged at the two ends of the valve core 4, and a spring is sleeved on the main shaft. Two springs are provided on a single main shaft, and the springs are respectively arranged at the two ends of the outer side of the valve core 4. One end of the spring is fixed, and the other end of the spring is in elastic contact with the outer side of the valve core 4.

[0041] Structure 2: The elastic component 8 includes a main shaft (long straight shaft), an axial hole is provided at the end of the valve core 4, the axis of the main shaft is parallel and perpendicular to the axis of the valve core 4, the valve core 4 is assembled on the main shaft through the axial hole, and two main shafts are provided, and the two main shafts are respectively provided at the two ends of the valve core 4, and a spring is sleeved on the main shaft. Two springs are provided on a single main shaft, and the two springs are both provided inside the valve core 4 and against the inner side surface of the valve core 4, one end of the spring is fixed, and the other end of the spring is in elastic contact with the inner side surface of the valve core 4.

[0042] Structure three, the elastic component 8 includes a U-shaped spring, one side of the U-shaped spring is a fixed side, a fixed column is arranged at the turning point of the U-shaped spring, the fixed side is fixedly arranged relative to the valve body 1, and the other side of the U-shaped spring is an elastic movable side, the elastic activity range of the elastic movable side is not less than the movement limit of the valve core 4 (that is, the movement limit of the unilateral movement of the valve core 4), the elastic movable side is against the valve core 4, and corresponding to one valve core 4, two U-shaped springs are arranged at the same end of the valve core 4, which respectively provide elastic resistance to the forward and backward movement of the valve core 4 (or provide a reset elastic force for the valve core 4).

[0043] The present invention also provides upper and lower end plates 9 (the upper end plate is a cover plate, and the lower end plate is a base), and the upper and lower end plates 9 are fixedly arranged with the end plates 6 on both sides and form an outer frame of the component unit, and at least one valve body 1 is arranged in the outer frame of the component unit; the assembled explosion-proof wave valve assembly includes at least one group of component units. The door-type assembled explosion-proof wave shielding valve with two-way wave dissipation includes a door leaf, and a vent is arranged on the door leaf. The assembled explosion-proof wave valve assembly is adjustable in number and arranged on the vent. The assembled explosion-proof wave valve assembly is arranged on the door leaf through the valve body 1 mounting frame. The door-type assembled explosion-proof wave shielding valve with two-way wave dissipation includes a door frame, and the door leaf is hinged with the door frame. A conductive sealing structure is arranged on the door frame, and the door leaf is airtightly closed with the door frame through the conductive sealing structure. When the assembled explosion-proof wave valve assembly includes multiple groups of component units, each component unit can form an airway. The present invention adopts a multi-airway design, which effectively reduces the mass of the valve core 4, can effectively reduce the closing time of the valve core 4, and improve the wave dissipation rate. The valve core 4 is a tubular structure with a small mass, which can ensure that the valve can be started under a relatively low shock wave overpressure. Reducing the mass of the valve core 4 and controlling the movement stroke can effectively control the impact force and improve the design resistance.

[0044] The door leaf is provided with a component unit, and its wave-facing surface is provided with a metal waveguide window. Further, the metal waveguide window corresponds to all component unit settings (i.e., the metal waveguide window can cover the vent of the entire door leaf), and the metal waveguide window can improve the electromagnetic shielding function of the present invention. In addition, the present invention can also provide an electric sealing door on the door leaf to realize the electric closing of the vent.

[0045] As can be seen from the above, the present invention provides a door-type assembled bidirectional wave-absorbing explosion-proof wave shielding valve, which includes: an assembled explosion-proof wave valve assembly, the assembled explosion-proof wave valve assembly includes an assembly unit, the assembly unit includes a valve body 1, a ventilation channel 2 is arranged on the valve body 1, a valve cavity 3 is arranged in the middle of the ventilation channel 2, the mouth structure of the valve cavity 3 communicating with the ventilation channel 2 is a valve cavity air port, a valve core 4 is arranged in the valve cavity 3, the valve core 4 can be elastically movable along the direction of air flow, and the valve core 4 can block the valve cavity air port in front of it along the direction of air flow to achieve air flow cutoff of the ventilation channel 2. The present invention has developed and provided a new assembled explosion-proof wave valve, which adopts a new wave-absorbing structure, and has significant performance advantages in wave-absorbing performance on the basis of ensuring ventilation performance. Through the comparison of the resistance performance and wave absorbing performance under the action of the shock wave of a simulated nuclear explosion, the pressure peak wave absorbing rate of the finalized product ZH200 (5) under the nuclear 5 resistance level can be increased from 39.2% to 91%, and the energy wave absorbing rate can be increased from 84.1% to 97.2%. Under this technical index, the diffusion chamber or the wave absorbing chamber can be eliminated, and the residual pressure directly after the wave absorbing of the equipment meets the protection requirements of the equipment and personnel. According to the test, the equivalent ventilation diameter of a finalized product of the present invention is 195mm, and its ventilation local resistance coefficient is 3.5, which is better than the local resistance coefficient of the hose valve 6.46 and the local resistance coefficient of HK200 (5) 4.08. The ratio of its ventilation area to the installation area is 28.7%, which is better than the hose valve 19.5% and close to the 31.2% of HK200 (5). In addition, the present invention relies on the shock wave to close and the spring device to reset in principle, and can be installed at any angle. Compared with the swing valve that relies on gravity to reset and can only be installed vertically, the present invention has better reliability and applicability. The present invention adopts an all-metal structure. Compared with the sealing strips of hoses and swing valves, it does not have the problems of aging and high temperature resistance, and can achieve the maintenance-free requirement during the use period. The modular and assembled design can be conveniently carried out for blocking and door-type installation. There is no need to process and open holes in the protective door, and only the corresponding installation space needs to be reserved. At the same time, the valve module has load transfer capabilities, and there is no need to reinforce the equipment after the hole is opened. It can be directly embedded in the protective door, and there is no obvious protrusion on the surface of the door leaf after installation, which can reduce the corresponding supporting civil engineering dimensions to a certain extent.

[0046] The present invention provides a door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve. The door-type assembled bidirectional wave-absorbing and explosion-proof shielding valve (hereinafter referred to as the shielding valve) adopts a door-type structure, that is, similar to the traditional door leaf structure, it can be opened horizontally or opened and closed up and down to realize the opening or closing of the building mouth structure. This structure is quite different from the traditional swing-type valve and hose-type valve structure. The traditional swing-type valve and hose-type valve are both fixedly installed and cannot realize the opening of the building mouth structure. The assembly type specifically refers to that the component unit set on the shielding valve is assembled and installed on the door leaf, and the setting method is flexible and the setting quantity is adjustable. Specifically, the shielding valve provided by the present invention includes a door leaf and a component unit. The door leaf is made of stainless steel plate, and the internal cavity of the door leaf is filled with a hard pressed mineral wool core. The present invention is also provided with a door frame and a threshold, which are made of stainless steel hollow steel. The door frame and the threshold can be welded from stainless steel components, or assembled by other methods (such as bolt connection). The door frame and the threshold can be installed on the building opening structure by embedding, screwing, anchoring, etc. A conductive sealing structure is arranged on the door frame and the threshold or the building opening structure to weaken electromagnetic waves. A strong handle is arranged on the door leaf of the shielding valve (the handle can be arranged on one side, that is, a handle is arranged on one side of the door leaf, or one handle can be arranged on each side) to pull the door away from the door frame. The suction force can be adjusted to ensure the best compression degree of the seal. The conductive sealing structure has two functions: 1. sealing, and 2. conduction. In the present invention, the conductive sealing structure includes conductive rubber, which is a rubber component with a sealing function filled with fine conductive particles. The conductive rubber uses silicone rubber or fluorinated silicone rubber as a binder, pure silver, silver-plated aluminum, silver-plated copper or silver-plated glass as a filler, and then is made into a strip structure with a certain cross-sectional shape according to the design shape. Conductive rubber has excellent pressure and water vapor sealing properties. When the frequency is high, it has a greater attenuation of electromagnetic waves and is an ideal gasket material. Furthermore, the conductive sealing structure also includes a conductive fabric layer. The conductive fabric layer is based on chemical fiber fabric, and copper or nickel is plated on the chemical fiber fabric to form a flexible material with conductive function. It has good shielding effectiveness for high frequency and microwaves. The present invention can use conductive rubber alone as a conductive sealing structure, or it can composite conductive rubber and conductive cloth (conductive fabric layer) into an absorption shielding composite structure. The shielding effectiveness in the range of 30MHz to 1GHz is 30 to 50dB, and it can be used as additional shielding protection outside the connector or cable. In order to ensure the integrity and firmness of the shielding, conductive glue is often used to glue the joint surface at the gap, which is suitable for permanent sealing. When the frequency is less than 1GHz, the effect is better. It can prevent the conductive gasket from slipping and improve the shielding effectiveness.

[0047] The component unit (and its installation frame and other structures) provided on the door leaf of the present invention is made of metal material, which has high structural strength and certain shielding function. When used with the metal waveguide window, the door leaf provided by the present invention can still have high shielding effectiveness even in the microwave band, and has high mechanical strength and stable and reliable operation. The working principle of the present invention is: when the frequency of the electromagnetic wave is lower than the waveguide cutoff frequency of the metal waveguide window, the electromagnetic wave transmitted in the waveguide will decay quickly, which effectively suppresses the leakage of electromagnetic waves below the cutoff frequency. Compared with metal wire mesh and perforated metal plate, the cutoff waveguide type ventilation hole has significant advantages.

[0048] Electromagnetic pulses are the main threat to protective engineering. The building opening is one of the important ways for electromagnetic pulse energy to enter the project. It is necessary to develop protective equipment with anti-electromagnetic pulse function to improve the overall protection capability of the project. The shielding valve provided by the present invention is an opening protection device with anti-electromagnetic pulse function. They are matched with each other and basically meet the needs of engineering construction. Combined with the research results of electrical sealing measures, scientific, practical and simple protective equipment anti-electromagnetic pulse protective equipment, door-type assembled bidirectional clipping explosion-proof wave shielding valve and its manufacturing and installation method are proposed.

[0049] The new type of door-type assembled bidirectional wave clipping explosion-proof wave shielding valve provided by the present invention meets the requirements of the existing shielding room ventilation openings of protective engineering to take into account the anti-electromagnetic pulse function. The door-type assembled bidirectional wave clipping explosion-proof wave shielding valve adopts a new wave-breaking structure. On the basis of ensuring ventilation performance, it has significant performance advantages in wave-breaking performance and has a high wave-breaking efficiency. The ventilation cutoff waveguide window and the door-type assembled bidirectional wave clipping explosion-proof wave shielding valve are installed at the air inlet and outlet, which has reliable anti-electromagnetic pulse performance, reasonable structure, and easy promotion.

[0050] The design requirements of the matching shielding valve provided by the present invention are as follows:

[0051] 1. The equipment layout dimensions meet the relevant dimension requirements of RFJ01-2008 hose-type explosion-proof valve;

[0052] 2. Shielding function and ventilation protection function, air volume requirement ≥ 22000m 3 / h;

[0053] 3. The door frame and door leaf are shielded by conductive rubber sheets, and the rear of the valve is shielded by ventilation waveguides;

[0054] 4. The door leaf is equipped with a safety positioning device, which needs to be installed for normally open door leaves, but not for normally closed door leaves.

[0055] For the structural design of metal waveguide windows, metal wire mesh and perforated metal plate mesh are only suitable for occasions where the incident field frequency is lower than 100MHz and the shielding effectiveness requirement is not high. In the present invention, the cut-off waveguide type ventilation hole has a wide adaptability, high shielding effectiveness, wide working frequency band, and still has high shielding effectiveness even in the microwave band, and has high mechanical strength and stable and reliable operation. The working principle of the cut-off waveguide type is as follows: when the frequency of the electromagnetic wave is lower than the waveguide cut-off frequency, the electromagnetic wave transmitted in the waveguide will decay quickly, which effectively suppresses the leakage of electromagnetic waves below the cut-off frequency. Compared with metal wire mesh and perforated metal plate, the cut-off waveguide type ventilation hole has significant advantages. When selecting the shielding body material, materials such as steel plate, tinplate, steel plate mesh, and steel mesh can be selected. For materials with high shielding grade, materials with good shielding effectiveness are selected. When steel plates are selected for the shielding body, the steel plates should be welded or crimped at the joints, and holes and gaps that reduce the shielding effectiveness should not be formed. When testing the shielding effectiveness, the welds or assembly seams between the steel plates should be measured in particular. When the shield body is made of thinner galvanized steel plates such as tinplate, it is advisable to use a wall-attached type, and the joints should be overlapped by 50mm before soldering. Avoid using corrosive solder during welding. When the shield body is made of steel plate mesh, the steel plate meshes can be overlapped by 50mm and crimped and spot welded, and the spacing between welding points should not exceed 0.1m. When using steel mesh, it must meet the structural steel mesh requirements of strength, and fine steel bars and dense meshes should be used. All steel bar joints should be welded or cold extruded to form steel bar rings on each section of the steel mesh. The intersection of steel bars should be welded or commercially available welded steel mesh should be used. For shield bodies composed of single-layer or multi-layer steel rib mesh, steel bars, steel pipes or other metal conductors that have no electrical connection with the steel mesh should be avoided from passing through the shield body.

[0056] When designing a shielding room, the door used in the shielding room must be a shielding door, and one is preferred. The shielding efficiency of the shielding door should be consistent with the shielding body and shall not be lower than the shielding index required by the design. If the shielding body is made of non-solid metal materials such as steel mesh and steel plate mesh, the door frame should be welded to the steel mesh or steel plate mesh on all sides. The air inlet and outlet on the shielding body also need to be designed as a shielding door structure. In addition, a metal waveguide window or a ventilation window composed of multiple layers of fine steel plate mesh should be set at the air outlet. The shielding efficiency of the cutoff waveguide window or steel plate mesh ventilation window should be consistent with the shielding body and shall not be lower than the shielding index required by the design. The present invention adopts a honeycomb cutoff waveguide ventilation plate (metal waveguide window), which is mainly used in the ventilation openings of electromagnetic shielding facilities. It has a good dual function of shielding and ventilation. Different materials, coatings and shapes can be selected according to different occasions and environments of use. The honeycomb cutoff waveguide ventilation plate is mainly used in the ventilation openings of electromagnetic shielding facilities. It has a good dual function of shielding and ventilation. Different materials, coatings and shapes can be selected according to different occasions and environments of use.

[0057] For the overall construction description of the shielding room: Class I shielding room: Shielding body: The six sides are made of galvanized rectangular tube intermittently welded keel frame; the top and four walls are made of 2mm galvanized steel plate to make the shielding layer; the bottom is made of 3mm galvanized steel plate to make the shielding layer, and the steel plate must be fully welded. Accessories: The strong and weak current incoming lines must be connected through the filter; the air inlet and outlet are equipped with ventilation cutoff waveguide windows and electric shielding doors. Class II shielding room: The top and four walls of the shielding body are made of galvanized steel plates (or tinplate) as a whole, and the bottom is welded with 3mm galvanized steel plates; the strong and weak current incoming lines must be connected through the filter, the air inlet and outlet are equipped with ventilation cutoff waveguide windows, and the shielding door is a simple shielding door with beryllium bronze reed crimping. For other rooms, the Class II shielding room can also refer to the Class I shielding room. Class III shielding: The vertical and horizontal steel bars of the bottom plate, the surrounding side walls and the inner and outer layers of the top plate of the entire project must be welded through the length to form a closed loop (similar to a Faraday cage). The underground part of the building is a complete hexahedral concrete steel mesh structure, and the grid nodes of the outer wall steel mesh are staggered (interval 0.5-1 meter). Grounding system: The grounding electrode and the grounding busbar are horizontally converged to the central grounding body in a radial manner, and the grounding resistance must be less than 0.5Ω. Shielding room decoration: The ground is an overhead anti-static floor; the ceiling is a microporous aluminum gusset plate; the wall is a color steel plate or aluminum-plastic plate. Indoor electrical equipment includes: high-voltage distribution box, communication distribution box, grille lights, switch wall plugs, etc. Note: The underground civil air defense project should do a good job in moisture-proofing, anti-corrosion, grounding and ventilation.

[0058] The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve provided by the present invention has at least the following structural advantages through the above-mentioned structural design: 1. It can withstand shock waves in both directions, and the resistance level in both directions is not lower than the nuclear 5 and conventional 5 levels; 2. Under the design resistance, the residual pressure after the wave absorption system absorbs the wave is not greater than 0.03MPa; 3. The equipment has good durability and key components are maintenance-free during their service life; 4. The base material is resistant to high temperatures and has a temperature resistance of ≥300°C; 5. The specifications of the wave absorption system are modularized and standardized and can be assembled; 6. It is non-gravity sensitive and can be installed at any angle; 7. The ventilation performance is good and meets the starting wind pressure and ventilation volume requirements of the project.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A door-type assembled bidirectional wave-absorbing explosion-proof wave shielding valve, characterized in that: include: An assembled explosion-proof valve assembly, the assembled explosion-proof valve assembly comprising an assembly unit, the assembly unit comprising a valve body (1), a ventilation channel (2) being arranged on the valve body, a valve cavity (3) being arranged in the middle of the ventilation channel, an opening structure of the valve cavity communicating with the ventilation channel being a valve cavity air port, a valve core (4) being arranged in the valve cavity, the valve core being elastically movable along the direction of air flow, the valve core being able to block the valve cavity air port in front of it along the direction of air flow to achieve air flow cutoff of the ventilation channel.

2. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 1 is characterized in that: The valve body comprises an upper valve body plate (1a) and a lower valve body plate (1b), wherein the upper valve body plate and the lower valve body plate are spaced apart from each other in the upper and lower directions to form a single-sided ventilation duct structure, wherein two single-sided ventilation duct structures are provided, and the two single-sided ventilation duct structures are spaced apart from each other in the front and rear directions, and the valve core is provided between the two single-sided ventilation duct structures and can be abutted against the front or rear side to realize airflow cutoff of the ventilation channel.

3. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 2 is characterized in that: In the same assembled explosion-proof valve assembly, a plurality of valve bodies are provided, and the valve bodies can be arranged in a vertical direction to form a parallel structure, or the valve bodies can be arranged in a front-to-rear direction to form a series structure.

4. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 3 is characterized in that: In the parallel structure of the valve bodies, adjacent valve bodies are arranged with intervals between them, and sealing plates (5) are arranged between adjacent valve bodies for sealing the intervals between the valve bodies.

5. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 1 is characterized in that: Two side end plates (6) are arranged along the axial direction of the valve core, the valve body is fixedly arranged on the two side end plates, and the valve core is movably arranged on the two side end plates.

6. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 5 is characterized in that: Sliding holes (7) are arranged on the two side end plates, and the ends of the valve core can be movably arranged in the sliding holes.

7. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 5 is characterized in that: The valve core is elastically and movably arranged on the valve body via an elastic component (8); The elastic component includes a main shaft, an end of the valve core is provided with an axial hole, the valve core is assembled on the main shaft through the axial hole, a spring is sleeved on the main shaft, the spring is provided at both ends of the outer side of the valve core, and the spring is in elastic contact with the valve core; Or, the elastic component includes a main shaft, an end of the valve core is provided with an axial hole, the valve core is assembled on the main shaft through the axial hole, a spring is sleeved on the main shaft, the spring is fixed relative to the main shaft, the spring is located inside the valve core and can elastically contact with the inner wall of the valve core; Alternatively, the elastic component includes a U-shaped spring, one side of the U-shaped spring is a fixed side, the fixed side is fixedly arranged relative to the valve body, the other side of the U-shaped spring is an elastic movable side, the elastic activity range of the elastic movable side is not less than the movement limit of the valve core, and the elastic movable side is against the valve core.

8. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 5 is characterized in that: It also includes upper and lower end plates (9), which are fixedly arranged with the two side end plates to form a component unit outer frame, and at least one valve body is arranged in the component unit outer frame; The assembled explosion-proof valve assembly includes at least one group of assembly units.

9. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 1 is characterized in that: The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve includes a door leaf, on which a vent is arranged, and the assembled explosion-proof wave valve components are adjustable in number and arranged on the vent, and the assembled explosion-proof wave valve components are arranged on the door leaf through a valve body mounting frame.

10. The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve according to claim 9 is characterized in that: The door-type assembled bidirectional wave-absorbing and explosion-proof wave shielding valve comprises a door frame, and the door leaf is hinged to the door frame; A conductive sealing structure is provided on the door frame, and the door leaf is airtightly closed to the door frame through the conductive sealing structure.

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