A rewinding explosion-proof valve capable of realizing early closing function

Abstract

The present invention provides a rewinding explosion-proof valve capable of realizing an early closing function, comprising a door frame, a valve assembly, a rewinding path and a sensor, wherein the valve is installed at the project entrance, the door frame is connected to the door frame wall, the valve assembly is located at the air inlet side of the door frame, a ventilation hole is arranged on the door frame, when the valve is in a ventilation state, there is a gap between the door frame and the valve assembly, and air flows through the rewinding path, the gap between the door frame and the valve assembly and the ventilation hole in sequence to enter the project, when the valve is in a closed state, the door frame contacts the valve assembly, the sensor is arranged on the outside of the valve assembly, and the sensor is connected to the rewinding path or the door frame wall. The valve is usually in an open state to maintain normal ventilation in the project, and when the project is hit, the valve can be closed in advance to block the shock wave outside the project, thereby ensuring the safety of personnel and equipment inside the project.

Description

Technical Field

[0001] The invention relates to the field of protective engineering protective equipment, and in particular to a rewinding explosion-proof wave valve capable of realizing an early closing function. Background Art

[0002] Explosion-proof valves are a type of protective equipment installed at the inlet (exhaust) and smoke exhaust duct openings of protective projects to block or weaken shock waves. They are usually open to ensure normal ventilation of the project; when the ventilation opening is subjected to the impact load of the explosion, the valve closes quickly under the action of the shock wave, thereby ensuring the safety of equipment and personnel inside the project.

[0003] The explosion-proof valve should not only have a high wave absorption rate, but also fully consider the design strength of the valve's moving parts to avoid damage to the valve due to high-speed impact, which would affect its ventilation function. When designing, it is usually necessary to consider setting up certain buffering and energy-absorbing measures to effectively dissipate the impact energy through the larger deformation of the buffering and energy-absorbing parts.

[0004] The existing explosion-proof valves mainly include pendulum-type explosion-proof valves, hose-type explosion-proof valves, sleeve-type explosion-proof valves, etc. (such as Figure 1 , Figure 2 , Figure 3 As shown in the figure, the valve base of the above valves mostly adopts a flat plate structure. According to the ventilation volume requirements, a certain number of valve units (such as pendulum plates, sleeves, hoses, etc.) are provided on the valve base. The valve units are usually in an open state, and external air can enter the interior of the project through the ventilation holes provided on the units; when the project is hit, the valve is closed by the shock wave, that is, the path for the shock wave to propagate to the interior of the project through the ventilation holes on the valve units is blocked, and the shock wave is blocked outside the project by the valve. However, considering that the valve uses the shock wave as the closing power, and the valve needs a certain amount of time to close, it is inevitable that part of the shock wave will leak from the ventilation holes to the interior of the project during the valve closing process, posing a greater threat to the safety of the project. Summary of the invention

[0005] The purpose of the present invention is to provide a revolving explosion-proof wave valve that can realize the early closing function. The valve can provide an efficient and reliable protection measure for the ventilation openings of the protective project, significantly improve the project protection capability, and ensure the safety of personnel and equipment inside the project.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A rewinding explosion-proof wave valve capable of realizing an early closing function comprises a door frame, a valve assembly, a rewinding path and a sensor, wherein the valve is installed at the entrance of a project, the door frame is connected to a door frame wall, the valve assembly is located at an air inlet side of the door frame, a ventilation hole is arranged on the door frame, when the valve is in a ventilating state, there is a gap between the door frame and the valve assembly, and air flows through the rewinding path, the gap between the door frame and the valve assembly and the ventilation hole in sequence to enter the interior of the project, when the valve is in a closed state, the door frame is in contact with the valve assembly, the sensor is arranged on the outside of the valve assembly, and the sensor is connected to the rewinding path or the door frame wall.

[0008] Furthermore, in the above-mentioned wrap-around explosion-proof wave valve that can realize the early closing function, the wrap-around path is formed by an inner sleeve, a middle sleeve and an outer sleeve with different inner diameters and a first ring, a second ring, a third ring and a fourth ring, the outer inner diameter of the inner sleeve is less than the inner diameter of the middle sleeve and less than the inner diameter of the outer sleeve, there is a distance between the inner sleeve and the middle sleeve, there is a distance between the middle sleeve and the outer sleeve, one end of the middle sleeve is located between one end of the outer sleeve and one end of the inner sleeve, the other end of the inner sleeve is flush with the other end of the outer sleeve, the outer ring of the first ring is connected to one end of the outer sleeve, the inner ring of the first ring is connected to the door frame, and the outer ring of the second ring is connected to the middle sleeve. One end is connected, the inner ring of the second circular ring is in a clearance fit relationship with the valve assembly, the outer ring of the third circular ring is connected to the other end of the middle sleeve, the inner ring of the third circular ring is connected to the outer wall of the inner sleeve, the outer ring of the fourth circular ring is connected to the other end of the outer sleeve, one end of the inner sleeve is close to the valve assembly, the other end of the inner sleeve is far away from the valve assembly, the inner ring of the fourth circular ring is connected to the other end of the inner sleeve, the third circular ring is provided with a vent hole, the space between the inner sleeve and the middle sleeve, the vent hole, and the space between the middle sleeve and the outer sleeve are connected in sequence to form the detour; preferably, the inner sleeve, the middle sleeve and the outer sleeve are all made of steel plates.

[0009] Furthermore, in the above-mentioned rewinding explosion-proof wave valve that can realize the early closing function, the first circular ring and the outer sleeve, the first circular ring and the middle sleeve, the third circular ring and the middle sleeve and the inner sleeve, and the fourth circular ring and the outer sleeve and the inner sleeve are all connected by welding.

[0010] Further, in the above-mentioned winding explosion-proof wave valve capable of realizing the early closing function, the valve assembly includes a base and a movable part, the base includes a flat plate, a hollow cylindrical section and a spherical plate, the flat plate is a circular structure, the flat plate covers one end of the cylindrical section, the spherical plate covers the other end of the cylindrical section, the vertex of the spherical plate is located on the extension line of the axis of the cylindrical section, the movable part includes a hollow cylindrical section and a spherical section, the spherical section covers one end of the cylindrical section, the vertex of the spherical section is located on the extension line of the axis of the cylindrical section, the cylindrical section surrounds the outside of the above-mentioned base, the spherical section of the movable part is adapted to the spherical plate of the base, the movable part can approach or move away from the base, when the spherical section of the movable part approaches the spherical plate of the base, the other end of the cylindrical section can contact the door frame, and the contact of the other end of the cylindrical section with the door frame can make the valve in a closed state; preferably, a reinforcing rib is connected between the flat plate of the base and the door frame.

[0011] Furthermore, in the above-mentioned wraparound explosion-proof wave valve capable of realizing an early closing function, the door frame wall is provided with a third through hole, the third through hole comprises a first circular hole and a second circular hole, the diameter of the first circular hole is smaller than that of the second circular hole, a mounting step is formed at the connection between the first circular hole and the second circular hole, the first circular ring is mounted at the mounting step, the outer diameter of the outer sleeve is equal to the diameter of the second circular hole, the length of the outer sleeve is smaller than the length of the second circular hole, the door frame comprises a bottom plate, a barrel-shaped section and an annular plate, the outer diameter of the barrel-shaped section is consistent with the diameter of the first circular hole, and the bottom plate covers a portion of the barrel-shaped section. end, one end of the barrel-shaped section is located in the first circular hole, and the other end of the barrel-shaped section extends into the second circular hole, the inner ring of the annular plate is connected to the middle part of the outer wall of the barrel-shaped section, the inner ring of the first circular ring is connected to the outer ring of the annular plate, the barrel-shaped section of the door frame is fixedly connected to the anchor hook embedded in the side wall of the first circular hole, the annular plate of the door frame is fixedly connected to the anchor hook embedded in the side wall of the mounting step, the outer sleeve is fixedly connected to the anchor hook embedded in the side wall of the second circular hole, and the door frame is connected to the first circular ring by welding; a plurality of ventilation holes are arranged on the bottom plate.

[0012] Furthermore, in the above-mentioned rewinding explosion-proof wave valve that can realize the early closing function, the valve assembly also includes a reset component, the reset component includes a hollow spring column, a reset spring and a hollow limit column, the spherical plate is provided with a first through hole, one end of the limit column is connected to the flat plate, the other end of the limit column extends to the outside of the spherical plate after passing through the first through hole, one end of the spring column is connected to the inner surface of the spherical segment, the other end of the spring column extends into the limit column, the spring column can move along the axial direction of the limit column, the reset spring is arranged in the spring column, and preferably, four reset components are arranged.

[0013] Furthermore, in the above-mentioned rewinding explosion-proof wave valve that can realize the early closing function, the valve assembly also includes a pneumatic push rod, and the pneumatic push rod includes a sleeve portion and a piston portion, one end of the sleeve portion is installed in the center of the door frame, and the other end of the sleeve portion is connected to the flat plate; one end of the piston portion is connected to the spherical section of the movable part, and the other end of the piston portion extends into the sleeve portion after passing through the base, and the piston portion can reciprocate along the axis of the piston portion, and the reciprocating motion of the piston portion in the piston portion can drive the movable part to approach or move away from the base. Preferably, a plurality of sensors are provided, and the plurality of sensors are connected to the pneumatic push rod signal, and the sensor can control the movement of the pneumatic push rod.

[0014] Furthermore, in the above-mentioned rewinding explosion-proof wave valve that can realize the early closing function, the valve assembly also includes a buffer layer, which is arranged on the outer surface of the spherical plate of the base, and the buffer layer is a spherical shell structure. The inner diameter of the buffer layer is equal to the outer diameter of the spherical plate. A second through hole is provided on the buffer layer, and the second through hole is used for the spring column to pass through. The diameter of the second through hole is equal to the outer diameter of the limit column, and the inner diameter of the spherical section of the movable part is equal to the outer diameter of the buffer layer. Preferably, the buffer layer is welded to the spherical plate.

[0015] Furthermore, in the above-mentioned rewinding explosion-proof wave valve that can realize the early closing function, a limiting step is provided at the end of the cylindrical section of the movable part, and the limiting step can be clamped with the end of the inner ring of the second circular ring close to the door frame, and the limiting step prevents the movable part from being ejected; the cylindrical section of the movable part and the columnar section of the base are in a clearance fit relationship, and the inner diameter of the cylindrical section of the movable part is larger than the outer diameter of the columnar section of the base.

[0016] Furthermore, in the above-mentioned rewinding explosion-proof wave valve that can realize the early closing function, it also includes a buffer rubber strip, the inner diameter of the barrel section is smaller than the inner diameter of the cylindrical section, the inner diameter of the cylindrical section is < the outer diameter of the barrel section < the outer diameter of the cylindrical section, and an annular rubber strip groove is provided on the outer side of the end of the other end of the barrel section, and the buffer rubber strip is bonded in the rubber strip groove, and the inner diameter of the rubber strip groove is smaller than the inner diameter of the cylindrical section of the movable part; when the valve is in a closed state, the cylindrical section of the movable part contacts the buffer rubber strip.

[0017] It can be seen from the analysis that the present invention discloses a revolving explosion-proof valve that can realize the early closing function. The valve is usually in an open state to maintain normal ventilation in the project. When the project is hit, the valve can be closed in advance to block the shock wave outside the project and ensure the safety of personnel and equipment inside the project. When the shock wave disappears, the valve moves to the open position under the action of the reset component to ensure that the project is restored to the ventilation state. The valve can provide efficient and reliable protection measures for the ventilation openings of the protective project, significantly improve the protection capability of the project, and ensure the safety of personnel and equipment inside the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 The figure is a schematic diagram of the structure of a swing-type explosion-proof valve in the prior art.

[0020] Figure 2 The figure is a schematic diagram of the structure of a hose-type explosion-proof wave valve in the prior art.

[0021] Figure 3 The figure is a schematic diagram of the structure of a sleeve-type explosion-proof wave valve in the prior art.

[0022] Figure 4 It is a schematic cross-sectional structural diagram of a valve in a ventilation state according to an embodiment of the present invention.

[0023] Figure 5 The figure is a schematic cross-sectional view of the valve in a closed state according to an embodiment of the present invention.

[0024] Figure 6 for Figure 4 Schematic diagram of the local enlargement of point A.

[0025] Figure 7 for Figure 5 Schematic diagram of a partial enlargement of point B.

[0026] Figure 8The figure is a schematic diagram of the structure of a detour track according to an embodiment of the present invention.

[0027] Fig. 9 The figure is a schematic structural diagram of a door frame wall according to an embodiment of the present invention.

[0028] Fig.10 It is a schematic structural diagram of a base according to an embodiment of the present invention.

[0029] Fig.11 The figure is a schematic structural diagram of a movable part according to an embodiment of the present invention.

[0030] Fig.12 The figure is a schematic structural diagram of a buffer layer according to an embodiment of the present invention.

[0031] Fig.13 Schematic diagram of the structure of the third ring according to an embodiment of the present invention.

[0032] Description of reference numerals: 1 door frame wall; 11 third through hole; 111 first circular hole; 112 second circular hole; 12 mounting step; 13 anchor hook; 2 door frame; 21 reinforcing rib plate; 22 bottom plate; 221 ventilation hole; 23 barrel section; 231 buffer rubber strip; 24 annular plate; 3 valve assembly; 31 base; 311 flat plate; 312 columnar section; 313 spherical plate; 314 first through hole; 32 movable part; 321 cylindrical section; 32 2 spherical section; 323 limiting step; 33 reset assembly; 331 spring column; 332 reset spring; 333 limiting column; 34 pneumatic push rod; 341 sleeve portion; 342 piston portion; 35 cushion layer; 351 second through hole; 4 bypass; 41 inner sleeve; 42 middle sleeve; 43 outer sleeve; 44 first circular ring; 45 second circular ring; 46 third circular ring; 461 vent hole; 47 fourth circular ring; 5 gap; 6 sensor. DETAILED DESCRIPTION

[0033] 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.

[0034] 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 cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; 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.

[0035] One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numbers and letter labels to refer to features in the drawings. Like or similar labels in the drawings and description have been used to refer to like or similar parts of the present invention. As used herein, the terms "first", "second", "third", etc. are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0036] like Figures 4 to 13 As shown, according to an embodiment of the present invention, a wraparound explosion-proof valve capable of realizing an early closing function is provided. Figure 4 and Figure 5 As shown, it includes a door frame 2, a valve assembly 3, a bypass 4 and a sensor 6, wherein the valve is installed at the engineering opening, the door frame 2 is connected to the door frame wall 1, the valve assembly 3 is located on the air inlet side of the door frame 2, and a ventilation hole 221 is provided on the door frame 2 to realize the ventilation function. When the valve is in the ventilation state, Figure 4 As shown, there is a gap 5 between the door frame 2 and the valve assembly 3, and air flows through the bypass 4, the gap 5 between the door frame 2 and the valve assembly 3, and the ventilation hole 221 to enter the interior of the project. Figure 5 As shown, the door frame 2 is in contact with the valve assembly 3, the gap 5 between the door frame 2 and the valve assembly 3 is eliminated, and the shock wave is blocked. The sensor 6 is arranged on the outside of the valve assembly 3, and the sensor 6 is connected to the bypass 4 or the door frame wall 1. The sensor 6 is used to sense the light radiation, pressure and other signals caused by the explosion and control the valve assembly 3 to contact the door frame 2 in the form of electrical signals through autonomous judgment. The valve is usually in a ventilation state to maintain normal ventilation in the project. When the project is hit, the sensor 6 controls the valve assembly 3 to contact with the door frame 2, eliminates the gap 5 between the door frame 2 and the valve assembly 3, and then puts the valve in a closed state, blocks the shock wave outside the project, and ensures the safety of personnel and equipment inside the project. When the shock wave disappears, the valve can return to the ventilation state.

[0037] Furthermore, if Figure 8 As shown, the detour 4 is formed by an inner sleeve 41, a middle sleeve 42 and an outer sleeve 43 with different inner diameters and a first ring 44, a second ring 45, a third ring 46 and a fourth ring 47. The outer inner diameter of the inner sleeve 41 is less than the inner diameter of the middle sleeve 42 and less than the inner diameter of the outer sleeve 43. There is a distance between the inner sleeve 41 and the middle sleeve 42, and there is a distance between the middle sleeve 42 and the outer sleeve 43. One end of the middle sleeve 42 is located between one end of the outer sleeve 43 and one end of the inner sleeve 41, and the other end of the inner sleeve 41 is flush with the other end of the outer sleeve 43. The outer ring of the first ring 44 is connected to one end of the outer sleeve 43, the inner ring of the first ring 44 is connected to the door frame 2, the outer ring of the second ring 45 is connected to one end of the middle sleeve 42, the inner ring of the second ring 45 is in a clearance fit relationship with the valve assembly 3, the outer ring of the third ring 46 is connected to the other end of the middle sleeve 42, the inner ring of the third ring 46 is connected to the outer wall of the inner sleeve 41, the outer ring of the fourth ring 47 is connected to the other end of the outer sleeve 43, one end of the inner sleeve 41 is close to the valve assembly 3, the other end of the inner sleeve 41 is away from the valve assembly 3, the inner ring of the fourth ring 47 is connected to the other end of the inner sleeve 41, the space between the inner sleeve 41 and the middle sleeve 42, the vent 461, and the space between the middle sleeve 42 and the outer sleeve 43 are connected in sequence to form a detour 4. The third ring 46 is provided with a vent 461, such as Fig.13 As shown, there are several vent holes 461, and the several vent holes 461 are evenly distributed along the circumference of the third ring 46, so that the airflow can smoothly pass through the bypass 4 into the interior of the project, ensuring normal ventilation in the project. Preferably, the material of the inner sleeve 41, the middle sleeve 42 and the outer sleeve 43 are all steel plates, and the inner sleeve 41, the middle sleeve 42 and the outer sleeve 43 are all rolled by steel plates. The bypass 4 is composed of three layers of sleeve structures with different inner diameters, namely the inner sleeve 41, the middle sleeve 42 and the outer sleeve 43. The shock wave can freely propagate from the inside to the outside in the gap between the inner sleeve 41 and the middle sleeve 42, and between the middle sleeve 42 and the outer sleeve 43. During this period, the direction of the shock wave changes three times, all of which occur at the end of the sleeve structure. In view of the increase in pressure caused by local obstruction, in order to ensure reliable strength, the wall surface (the first ring 44, the second ring 45 and the fourth ring 47) at the end of the sleeve structure is thickened. The shock wave enters the outer channel of the project mouth (the second circular hole 112), and when it reaches the outside of the valve, it drives the movable part 32 to move toward the inside of the project. However, since the propagation is blocked at the end of the channel, the shock wave enters the detour path 4 instead. Since the detour path 4 is relatively long, it has a delay effect on the propagation of the shock wave, so that before it reaches the end of the detour path 4, the valve is already in a closed state, and the channel for the shock wave to propagate into the project is cut off, thereby realizing the wave-breaking function of the valve.

[0038] Furthermore, the first ring 44 and the outer sleeve 43, the first ring 44 and the middle sleeve 42, the third ring 46 and the middle sleeve 42 and the inner sleeve 41, and the fourth ring 47 and the outer sleeve 43 and the inner sleeve 41 are all connected by welding. Such an arrangement can make the structure of the detour 4 firm and reliable.

[0039] Furthermore, if Figure 6 and Figure 7 As shown, the valve assembly 3 includes a base 31 and a movable member 32. Fig.10 As shown, the base 31 is an integrated structure, and the base 31 includes a flat plate 311, a hollow columnar section 312 and a spherical plate 313. The spherical plate 313 is a spherical shell structure, and the flat plate 311 is a circular structure. The flat plate 311 covers one end of the columnar section 312, and the spherical plate 313 covers the other end of the columnar section 312. The vertex of the spherical plate 313 is located on the extension line of the axis of the columnar section 312. Fig.11 As shown, the movable member 32 is an integrated structure, and the movable member 32 includes a hollow cylindrical section 321 and a spherical section 322. The spherical section 322 is a spherical shell structure, and the spherical section 322 covers one end of the cylindrical section 321. The vertex of the spherical section 322 is located on the extension line of the axis of the cylindrical section 321. The cylindrical section 321 surrounds the outer side of the above-mentioned base 31. The spherical section 322 of the movable member 32 is adapted to the spherical plate 313 of the base 31. The movable member 32 can approach or move away from the base 31. When the spherical section 322 of the movable member 32 approaches the spherical plate 313 of the base 31, the movable member 32 can move closer to or farther from the base 31. When the plate 313 is formed, the other end of the cylindrical section 321 can contact the door frame 2, and the contact between the other end of the cylindrical section 321 and the door frame 2 can make the valve in a closed state; preferably, a reinforcing rib 21 is connected between the flat plate 311 of the base 31 and the door frame 2. In order to improve the impact resistance of the base 31, the flat plate 311 of the base 31 and the door frame 2 are connected as a whole through four groups of reinforcing ribs 21 and bear the load as a whole. The structure is simple, the layout is compact, and the strength is reliable. It not only significantly improves the impact resistance of the base 31, but also can achieve lower local wind resistance. The cylindrical section 321 of the movable part 32 is in a matching relationship with the second circular ring 45 of the bypass 4, and the outer diameter of the cylindrical section 321 of the movable part 32 is approximately equal to the inner diameter of the second circular ring 45. In order to improve the response speed of the valve, the movable part 32 is made of lightweight and high-strength material, and the base 31 is made of high-strength steel.

[0040] Furthermore, if Fig. 9As shown, the door frame wall 1 is provided with a third through hole 11, and the third through hole 11 includes a first circular hole 111 and a second circular hole 112. The diameter of the first circular hole 111 is smaller than that of the second circular hole 112. The connection between the first circular hole 111 and the second circular hole 112 forms a mounting step 12. The first circular ring 44 is mounted at the mounting step 12. The outer diameter of the outer sleeve 43 is equal to the diameter of the second circular hole 112. The length of the outer sleeve 43 is less than the length of the second circular hole 112. The door frame 2 is an integrated structure. The door frame 2 includes a bottom plate 22, a barrel section 23 and an annular plate 24. The outer diameter of the barrel section 23 is consistent with the diameter of the first circular hole 111. The bottom plate 22 covers one end of the barrel section 23. The barrel section 2 3 is located in the first circular hole 111, the other end of the barrel section 23 extends into the second circular hole 112, the inner ring of the annular plate 24 is connected to the middle of the outer wall of the barrel section 23, the inner ring of the first circular ring 44 is connected to the outer ring of the annular plate 24, the barrel section 23 of the door frame 2 is fixedly connected to the anchor hook 13 pre-embedded in the side wall of the first circular hole 111, the annular plate 24 of the door frame 2 is fixedly connected to the anchor hook 13 pre-embedded in the side wall of the installation step 12, the outer sleeve 43 is fixedly connected to the anchor hook 13 pre-embedded in the side wall of the second circular hole 112, and the door frame 2 is connected to the first circular ring 44 by welding. Such a setting can make the valve more secure and ensure the normal operation of the valve. A plurality of ventilation holes 221 are arranged on the bottom plate 22. In one embodiment of the present invention, four ventilation holes 221 are evenly arranged on the bottom plate 22 of the door frame 2 to achieve better ventilation.

[0041] Furthermore, if Figure 6As shown, the valve assembly 3 also includes a reset component 33, which includes a hollow spring column 331, a reset spring 332 and a hollow limit column 333. A first through hole 314 is provided on the spherical plate 313. One end of the limit column 333 is connected to the flat plate 311, and the other end of the limit column 333 extends to the outside of the spherical plate 313 after passing through the first through hole 314. One end of the spring column 331 is connected to the inner surface of the spherical segment 322, and the other end of the spring column 331 extends into the limit column 333. The spring column 331 can move along the axial direction of the limit column 333, and the spring column 331 can make a linear motion under the support and constraint of the limit column 333. The limit column 333 constrains the movement of the spring column 331 to ensure that the movable part 32 makes a linear reciprocating motion under the action of the shock wave, thereby avoiding jamming due to changes in the trajectory. A return spring 332 is arranged inside the spring column 331. After installation, the return spring 332 is in a compressed state. Preferably, in order to ensure that the valve is smoothly and reliably reset after the shock wave, the return assembly 33 is provided with four return components as a return measure. The spring column 331 and the limit column 333 are nested and cooperated with each other to support the movable part 32 on the base 31. The outer diameter of the spring column 331 is approximately equal to the inner diameter of the limit column 333. After the shock wave disappears, the movable part 32 can return to its original position under the action of the return spring 332, so that the valve returns to the ventilation state. When the end of the limit column 333 contacts the spherical section 322 of the movable part 32, the limit column 333 can reduce the radial load borne by the pneumatic push rod 34 and increase the service life of the light pneumatic push rod 34.

[0042] Further, the valve assembly 3 also includes a pneumatic push rod 34, which includes a sleeve portion 341 and a piston portion 342. One end of the sleeve portion 341 is installed at the center of the door frame 2, and the other end of the sleeve portion 341 is connected to the plate 311; one end of the piston portion 342 is connected to the spherical segment 322 of the movable member 32, preferably, one end of the piston portion 342 is fixedly connected to the spherical segment 322 of the movable member 32 by welding, and the other end of the piston portion 342 extends into the sleeve portion 341 after passing through the base 31, and the piston portion 342 can reciprocate along the axis of the piston portion 342, and the reciprocating motion of the piston portion 342 in the piston portion 342 can drive the movable member 32 to approach or move away from the base 31. Preferably, a plurality of sensors 6 are provided, and the plurality of sensors 6 are all connected to the pneumatic push rod 34 signal, and the plurality of sensors 6 can control the movement of the piston portion 342 of the pneumatic push rod 34. Such a setting can ensure that the pneumatic push rod 34 has enough response time to close the valve in advance before the shock wave reaches the valve. The sensor 6 first senses the light radiation, pressure and other signals caused by the explosion, and controls the pneumatic push rod 34 to drive the valve movable part 32 to close quickly in the form of electrical signals through autonomous judgment, so as to ensure that the valve is closed before the shock wave reaches the valve, thereby achieving a very high wave elimination rate.

[0043] Furthermore, the valve assembly 3 also includes a buffer layer 35, which is made of a buffer energy-absorbing material. In order to prevent the movable part 32 from undergoing large plastic deformation after the high-speed collision with the base 31 during the wave absorption process and to ensure that the valve can be reliably reset, a buffer layer 35 is arranged between the spherical plate 313 of the movable part 32 and the base 31. The buffer layer 35 undergoes large deformation to dissipate the collision energy between the movable part 32 and the base 31. The buffer layer 35 is arranged on the outer surface of the spherical plate 313 of the base 31. The buffer layer 35 is a spherical shell structure. The inner diameter of the buffer layer 35 is equal to the outer diameter of the spherical plate 313. For ease of installation, Fig.12 As shown, the cushion layer 35 is provided with a second through hole 351 as a reserved hole for the spring column 331, the second through hole 351 is used for the spring column 331 to pass through, the diameter of the second through hole 351 is equal to the outer diameter of the limit column 333, the inner diameter of the spherical section 322 of the movable member 32 is equal to the outer diameter of the cushion layer 35, and preferably, the cushion layer 35 is welded to the spherical plate 313. For easy installation, a reserved hole for the pneumatic push rod 34 is also provided on the cushion layer 35.

[0044] Furthermore, a limiting step 323 is provided at the end of the cylindrical section 321 of the movable part 32. When the reset assembly 33 pushes the movable part 32 to reset, the limiting step 323 can be engaged with the end of the inner ring of the second ring 45 close to the door frame 2, thereby limiting the movable part 32. The setting of the limiting step 323 can prevent the movable part 32 from being ejected. There is a clearance fit relationship between the cylindrical section 321 of the movable part 32 and the columnar section 312 of the base 31 and the buffer layer 35. The inner diameter of the cylindrical section 321 of the movable part 32 is larger than the outer diameter of the columnar section 312 of the base 31.

[0045] Furthermore, if Figure 6 As shown, it also includes a buffer rubber strip 231, which is made of high damping material. The inner diameter of the barrel section 23 of the door frame 2 is smaller than the inner diameter of the cylindrical section 321 of the movable part 32, and the inner diameter of the cylindrical section 321 of the movable part 32 is smaller than the outer diameter of the barrel section 23 of the door frame 2 and smaller than the outer diameter of the cylindrical section 321 of the movable part 32. The outer side of the end of the other end of the barrel section 23 is provided with an annular rubber strip groove, and the buffer rubber strip 231 is bonded in the rubber strip groove, and the inner diameter of the rubber strip groove is smaller than the inner diameter of the cylindrical section 321 of the movable part 32. When the valve is in the closed state, the cylindrical section 321 of the movable part 32 contacts the buffer rubber strip 231. Under the action of the shock wave, the cushion layer 35 and the buffer rubber strip 231 work at the same time, and the buffer rubber strip 231 further dissipates the impact energy of the movable part 32 and the base 31 by undergoing large deformation. When the valve is in the closed state, under the action of the shock wave, the cylindrical section 321 of the movable part 32 is in close contact with the buffer rubber strip 231, which can also prevent the shock wave from leaking and ensure the safety of personnel and equipment inside the project.

[0046] The specific implementation method and process of the valve's ventilation function in peacetime and wave-breaking function in wartime are as follows: Figures 4 to 7 As shown in FIG. 1 , the valve realizes the ventilation function of the valve when in the ventilation state, and realizes the wave-breaking function of the valve in the wartime when in the closed state. The conversion between the ventilation and wave-breaking states of the valve is mainly realized by the relative movement between the movable member 32 and the base 31. During normal ventilation, as shown in FIG. Figure 6 As shown, the movable part 32 is in an open state supported by the return spring 332, ensuring a certain gap between the movable part 32 and the base 31. Under the action of the fan, the external air passes through the inner sleeve 41, the middle sleeve 42, the outer sleeve 43, the gap between the door frame 2 and the valve assembly 3, and enters the door frame 2 through the gap, and finally enters the interior of the project through the four sets of ventilation holes 221 opened on the door frame 2. When a shock wave strikes, the valve has two measures for early closing. The first measure is: the sensor 6 arranged outside the project first senses the light radiation, pressure and other signals caused by the explosion, and controls the pneumatic push rod 34 to drive the movable part 32 of the valve to close quickly in the form of electrical signals through independent judgment, so as to ensure that it is closed before the shock wave reaches the valve, thereby achieving an extremely high wave elimination rate; the second measure is: when the first measure fails for some reason, the shock wave enters the outer channel of the project mouth (the second circular hole 112), and drives the movable part 32 to move toward the inside of the project when reaching the outside of the valve, but because the propagation is blocked at the end of the channel, the shock wave turns to enter the detour 4. In view of the long length of the detour 4, it has a delay effect on the propagation of the shock wave, so that before it reaches the end of the detour 4, the valve is already in a closed state, and the channel for the shock wave to propagate to the inside of the project is cut off, thereby realizing the wave elimination function of the valve, such as Figure 7 After the shock wave disappears, the movable member 32 of the valve can return to its original position under the action of the return spring 332, so that the valve returns to the ventilation state.

[0047] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0048] 1) The valve is composed of a pneumatic push rod 34, a movable part 32, a sensor 6, etc. Before the shock wave reaches the vent, the sensor 6 can sense the impact threat in advance and control the pneumatic push rod 34 to drive the movable part 32 to approach the door frame 2, thereby eliminating the gap 5 between the door frame 2 and the valve assembly 3, so that the valve can be quickly closed, thereby realizing the wave elimination function. Theoretically, the wave elimination rate can reach 100%. It is not necessary to set a valve diffusion chamber, and the rear end channel of the valve (the bypass channel 4) is directly connected to the ventilation hole 221 of the door frame 2. This is of great significance for improving the protection capability of the engineering vent, protecting the internal equipment and personnel safety, and reducing the engineering construction cost.

[0049] 2) By setting a rewinding delay channel (rewinding channel 4), the propagation distance of the shock wave is lengthened, giving the movable member 32 of the valve sufficient response time to move and close, thereby achieving a higher wave elimination rate. The technical solution of the present invention can ensure that when the pneumatic push rod 34 fails due to impact or interference, the valve can still be closed at a faster response speed. Depending on the size of the shock wave overpressure, most or all of the shock wave can be blocked outside the mouth.

[0050] 3) The wave-facing surface of the movable part 32 (spherical section 322) and the impact surface of the base 31 (spherical plate 313 of the base 31) adopt a spherical shell structure, which can ensure uniform load bearing and reliable strength; the moving matching surface between the movable part 32 and the base 31 is a cylindrical sleeve structure, which can ensure flexible reciprocating motion of the valve and is not easy to get stuck after the impact of the shock wave.

[0051] 4) In order to resist the high-intensity impact load of the valve during a high-speed impact, a buffer cushion layer 35 is arranged between the movable part 32 and the base 31, and a buffer rubber strip 231 is arranged at the contact position between the cylindrical section 321 of the movable part 32 and the door frame 2 as a buffering measure to ensure that the valve has reliable strength under the impact; in order to solve the problem of resetting the valve after the impact of the shock wave, four sets of resetting components 33 are arranged, which can not only alleviate the impact problem caused by the valve impact to a certain extent, but also help the movable part 32 to be smoothly and effectively reset after the impact of the shock wave, thereby ensuring the rapid recovery of the ventilation function.

[0052] 5) The base 31 and the door frame 2 are connected as a whole through the reinforcing ribs 21, which has a simple structure, compact layout and reliable strength, which not only significantly improves the impact resistance of the base 31, but also achieves lower local wind resistance.

[0053] The above description is only a preferred embodiment of the present invention and is 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 rewinding explosion-proof valve capable of realizing an early closing function, characterized in that: It includes door frame, valve assembly, bypass and sensor, among which: The valve is installed at the engineering opening, the door frame is connected to the door frame wall, the valve assembly is located at the air inlet side of the door frame, and a ventilation hole is arranged on the door frame. When the valve is in the ventilation state, there is a gap between the door frame and the valve assembly, and air flows through the bypass path, the gap between the door frame and the valve assembly, and the ventilation hole in sequence to enter the interior of the project. When the valve is in a closed state, the door frame is in contact with the valve assembly. The sensor is arranged on the outside of the valve assembly, and the sensor is connected to the bypass path or the door frame wall; The detour is formed by an inner sleeve, a middle sleeve and an outer sleeve with different inner diameters and surrounded by a first ring, a second ring, a third ring and a fourth ring. The outer inner diameter of the inner sleeve is smaller than the inner diameter of the middle sleeve and smaller than the inner diameter of the outer sleeve. There is a distance between the inner sleeve and the middle sleeve, and there is a distance between the middle sleeve and the outer sleeve. One end of the middle sleeve is located between one end of the outer sleeve and one end of the inner sleeve, and the other end of the inner sleeve is flush with the other end of the outer sleeve. The outer ring of the first circular ring is connected to one end of the outer sleeve, and the inner ring of the first circular ring is connected to the door frame. The outer ring of the second circular ring is connected to one end of the middle sleeve, and the inner ring of the second circular ring is in a clearance fit relationship with the valve assembly. The outer ring of the third circular ring is connected to the other end of the middle sleeve, and the inner ring of the third circular ring is connected to the outer wall of the inner sleeve. The outer ring of the fourth circular ring is connected to the other end of the outer sleeve, one end of the inner sleeve is close to the valve assembly, the other end of the inner sleeve is far away from the valve assembly, and the inner ring of the fourth circular ring is connected to the other end of the inner sleeve. The third ring is provided with a vent hole. The space between the inner sleeve and the middle sleeve, the vent hole, and the space between the middle sleeve and the outer sleeve are connected in sequence to form the detour path; The inner sleeve, the middle sleeve and the outer sleeve are all made of steel plates; The first circular ring and the outer sleeve, the first circular ring and the middle sleeve, the third circular ring and the middle sleeve and the inner sleeve, and the fourth circular ring and the outer sleeve and the inner sleeve are all connected by welding; The valve assembly includes a base and a movable part. The base includes a flat plate, a hollow columnar segment and a spherical plate. The flat plate is a circular structure. The flat plate covers one end of the columnar segment. The spherical plate covers the other end of the columnar segment. The vertex of the spherical plate is located on the extension line of the axis of the columnar segment. The movable part comprises a hollow cylindrical section and a spherical section, the spherical section covers one end of the cylindrical section, the vertex of the spherical section is located on the extension line of the axis of the cylindrical section, the cylindrical section surrounds the outside of the base, and the spherical section of the movable part is adapted to the spherical plate of the base. The movable part can approach or move away from the base. When the spherical section of the movable part approaches the spherical plate of the base, the other end of the cylindrical section can contact the door frame. The contact between the other end of the cylindrical section and the door frame can put the valve in a closed state.

2. The wraparound explosion-proof valve capable of realizing early closing function according to claim 1, characterized in that: A reinforcing rib is connected between the flat plate of the base and the door frame.

3. The wraparound explosion-proof valve capable of realizing early closing function according to claim 1, characterized in that: The door frame wall is provided with a third through hole, and the third through hole includes a first circular hole and a second circular hole, the diameter of the first circular hole is smaller than that of the second circular hole, a mounting step is formed at the connection between the first circular hole and the second circular hole, the first circular ring is mounted at the mounting step, the outer diameter of the outer sleeve is equal to the diameter of the second circular hole, and the length of the outer sleeve is smaller than the length of the second circular hole, The door frame includes a bottom plate, a barrel-shaped section and an annular plate. The outer diameter of the barrel-shaped section is consistent with the diameter of the first circular hole. The bottom plate covers one end of the barrel-shaped section. One end of the barrel-shaped section is located in the first circular hole. The other end of the barrel-shaped section extends into the second circular hole. The inner ring of the annular plate is connected to the middle of the outer wall of the barrel-shaped section. The inner ring of the first circular ring is connected to the outer ring of the annular plate. The barrel-shaped section of the door frame is fixedly connected to the anchor hook pre-embedded in the side wall of the first circular hole, the annular plate of the door frame is fixedly connected to the anchor hook pre-embedded in the side wall of the installation step, the outer sleeve is fixedly connected to the anchor hook pre-embedded in the side wall of the second circular hole, and the door frame is connected to the first circular ring by welding; A plurality of ventilation holes are arranged on the bottom plate.

4. The wraparound explosion-proof valve capable of realizing early closing function according to claim 1, characterized in that: The valve assembly further includes a reset component, which includes a hollow spring column, a reset spring and a hollow limit column. The spherical plate is provided with a first through hole, one end of the limiting column is connected to the flat plate, the other end of the limiting column passes through the first through hole and extends to the outside of the spherical plate, one end of the spring column is connected to the inner surface of the spherical segment, the other end of the spring column extends into the limiting column, and the spring column can move along the axial direction of the limiting column. The return spring is arranged in the spring column.

5. The wraparound explosion-proof valve capable of realizing early closing function according to claim 4 is characterized in that: The number of reset components is four.

6. The wraparound explosion-proof valve capable of realizing early closing function according to claim 1, characterized in that: The valve assembly further comprises a pneumatic push rod, which comprises a sleeve portion and a piston portion, one end of the sleeve portion is mounted at the center of the door frame, and the other end of the sleeve portion is connected to the plate; One end of the piston part is connected to the spherical section of the movable part, and the other end of the piston part extends into the sleeve part after passing through the base. The piston part can make reciprocating motion along the axis of the piston part, and the reciprocating motion of the piston part in the piston part can drive the movable part to approach or move away from the base.

7. The wraparound explosion-proof valve capable of realizing early closing function according to claim 6, characterized in that: A plurality of sensors are provided, and each of the plurality of sensors is connected to the pneumatic push rod signal, and the sensors can control the movement of the pneumatic push rod.

8. The wraparound explosion-proof valve capable of realizing early closing function according to claim 4, characterized in that: The valve assembly further includes a buffer layer, which is arranged on the outer surface of the spherical plate of the base, and is a spherical shell structure, and the inner diameter of the buffer layer is equal to the outer diameter of the spherical plate, and a second through hole is arranged on the buffer layer, and the second through hole is used for the spring column to pass through, and the diameter of the second through hole is equal to the outer diameter of the limit column, The inner diameter of the spherical section of the movable part is equal to the outer diameter of the buffer cushion layer.

9. The wraparound explosion-proof valve capable of realizing early closing function according to claim 8, characterized in that: The buffer layer is welded on the spherical plate.

10. The rewinding explosion-proof valve capable of realizing early closing function according to claim 1, characterized in that: A limiting step is provided at the end of the cylindrical section of the movable part, and the limiting step can be engaged with an end of the inner ring of the second circular ring close to the door frame, and the limiting step prevents the movable part from being ejected; The cylindrical section of the movable part and the columnar section of the base are in a clearance fit relationship, and the inner diameter of the cylindrical section of the movable part is greater than the outer diameter of the columnar section of the base.

11. The rewinding explosion-proof valve capable of realizing early closing function according to claim 3, characterized in that: It also includes a buffer rubber strip, the inner diameter of the barrel section is smaller than the inner diameter of the cylindrical section, the inner diameter of the cylindrical section is smaller than the outer diameter of the barrel section and smaller than the outer diameter of the cylindrical section. An annular rubber strip groove is provided on the outer side of the end of the other end of the barrel-shaped section, the buffer rubber strip is bonded in the rubber strip groove, and the inner diameter of the rubber strip groove is smaller than the inner diameter of the cylindrical section of the movable part; When the valve is in a closed state, the cylindrical section of the movable part contacts the buffer rubber strip.

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