Combined blast door with two wave-damping measures

Abstract

The application provides a combined blast-proof valve with two blast wave absorption measures, which comprises a base, a plurality of ventilation holes are arranged on the base, and a sleeve valve assembly is arranged on each ventilation hole; the sleeve valve assembly comprises an outer valve unit and an inner valve unit, the outer valve unit and the inner valve unit are communicated with each other, the outer valve unit is provided with a first ventilation opening, the inner valve unit is provided with a second ventilation opening, the first ventilation opening is located on one side of the base, the second ventilation opening is located on the other side of the base, air can enter from the first ventilation opening and be discharged from the second ventilation opening; wherein, when the blast wave spreads to the outer valve unit, the outer valve unit and the inner valve unit can sequentially consume the energy of the blast wave. The application discloses a combined blast-proof valve with two blast wave absorption measures, and the application can provide efficient and reliable protection measures for the ventilation opening of a protection project, significantly improve the protection ability of the project, and ensure the safety of the personnel and equipment in the project.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of protective engineering, in particular to a combined blast wave valve with two wave-damping measures. BACKGROUND

[0002] The blast wave valve is a kind of protective equipment arranged at the inlet (outlet) and exhaust pipe of a protective engineering, which is used to intercept or weaken the shock wave. The blast wave valve is in an open state in normal times to ensure normal ventilation of the engineering. When the ventilation port is subjected to the action of the explosion shock wave, the valve is quickly closed under the action of the shock wave, thereby ensuring the safety of the internal equipment and personnel of the engineering.

[0003] The design of the blast wave valve is a complex problem. The function of the valve is to reduce the shock wave. The shorter the closing time of the valve is, the higher the wave-damping rate is. This requires the weight of the moving part of the valve to be as light as possible. In the design, the method of reducing the structure size of the valve or selecting light materials is usually adopted to reduce the weight of the moving part of the valve. On the other hand, since the valve maintains a high-speed motion state under the action of the shock wave, when it is closed, the moving part of the valve will collide with the base. If the structural design strength of the moving part is insufficient, the collision energy will cause large plastic deformation of the moving part, thereby affecting the protection performance and ventilation function recovery of the valve. SUMMARY

[0004] The present application aims to provide a combined blast wave valve with two wave-damping measures, which can resist external explosion shock waves.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a combined blast wave valve with two wave-damping measures, comprising a base, a plurality of ventilation holes are arranged on the base, a sleeve type valve assembly is arranged on each ventilation hole, the sleeve type valve assembly comprises: an outer valve unit and an inner valve unit, the outer valve unit and the inner valve unit are in communication with each other, the outer valve unit has a first ventilation port, the inner valve unit has a second ventilation port, the first ventilation port is located on one side of the base, and the second ventilation port is located on the other side of the base, air can enter from the first ventilation port and be discharged from the second ventilation port; wherein, when the shock wave spreads to the outer valve unit, the outer valve unit and the inner valve unit can consume the energy of the shock wave in sequence.

[0006] Further, the outer valve unit comprises a limiting ring, an outer sleeve and an outer reset spring; one end of the outer sleeve is provided with a baffle, the outer wall of the outer sleeve is provided with a positioning ring, the other end of the outer sleeve extends into the ventilation hole, the outer wall of the outer sleeve is fitted with the ventilation hole, the limiting ring is arranged on the base, when one end of the outer sleeve moves into the ventilation hole, the positioning ring can contact the limiting ring to prevent the movement of the outer sleeve; the outer reset spring is located in the ventilation hole, the inside of the ventilation hole is provided with a boss, one end of the outer reset spring is connected with the boss, the other end of the outer reset spring is connected with the outer sleeve; the first ventilation port is arranged on the outer wall of the outer sleeve.

[0007] Further, the outer valve unit further comprises a buffer ring, the buffer ring is arranged on the limiting ring, and the buffer ring is located between the positioning ring and the buffer ring; one end of the inner ring of the limiting ring close to the buffer ring extends an annular protrusion, the annular protrusion extends into the buffer ring, and the outer wall of the annular protrusion is fitted with the inner wall of the buffer ring; when one end of the outer sleeve moves into the ventilation hole, the buffer ring serves as a buffer between the positioning ring and the limiting ring.

[0008] Further, the inner valve unit comprises an inner sleeve base, an inner sleeve and an inner reset spring; the inner sleeve base is arranged on the other side of the base, one end of the inner sleeve base is communicated with the ventilation hole, the inner sleeve and the inner reset spring are arranged in the inner sleeve base, one end of the inner reset spring is connected with the inner sleeve base, the inner sleeve is located between the outer valve unit and the inner reset spring, the other end of the inner reset spring is connected with the inner sleeve, the outer wall of the inner sleeve is fitted with the inner wall of the inner sleeve base; the inner sleeve comprises a first part, a second part and a third part connected in sequence, the pipe diameter of the first part, the pipe diameter of the second part and the pipe diameter of the third part decrease in turn, the first part is connected with the valve base, and the other end of the inner reset spring extends into the third part.

[0009] Further, the second ventilation port comprises an inner air hole and an outer air hole, the inner air hole is arranged on the outer wall of the inner sleeve, and the outer air hole is arranged on the outer wall of the inner sleeve base; when the valve is in the ventilation state, the inner air hole and the outer air hole are communicated.

[0010] Further, the first ventilation port comprises an air inlet hole group, each air inlet hole group comprises a plurality of air inlet holes, the plurality of air inlet holes are arranged on the outer sleeve, and the air inlet holes are arranged symmetrically around the axis of the outer sleeve; the total area of all the air inlet holes is the same as the minimum cross-sectional area of the ventilation hole; the number of the air inlet holes is 4.

[0011] Further, the first vent includes two air inlet hole groups, each of the air inlet hole groups includes a plurality of air inlet holes, the air inlet holes are arranged on the outer sleeve and symmetrically around the axis of the outer sleeve, the total area of all the air inlet holes is the same as the minimum cross-sectional area of the vent hole, the buffer ring and the limiting ring are each provided with a secondary air inlet hole group, the secondary air inlet hole group includes a plurality of secondary air inlet holes, the secondary air inlet holes are symmetrically arranged around the axis of the outer sleeve, in the initial state, the positions of the two secondary air inlet hole groups correspond to the positions of one of the air inlet hole groups, and when the buffer ring and the limiting ring are in contact, external air cannot enter the vent hole through the air inlet hole, and the number of the air inlet holes in each air inlet hole group is 4.

[0012] Further, the inner sleeve seat is provided with a key groove, the inner sleeve is provided with a flat key, the flat key is connected with the key groove, so that the inner sleeve can move along the key groove.

[0013] Further, the door frame is arranged in the door frame wall, and the base is connected with the door frame.

[0014] Further, the door frame is arranged in the door frame wall, and the base is connected with the door frame.

[0015] It can be analyzed that the application discloses a combined explosion-proof wave valve with two wave absorbing measures, can provide efficient and reliable protection measures for a protection engineering vent, significantly improves engineering protection capability, and guarantees safety of internal personnel and equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of this application form a part of the application, serve to provide further understanding of the application, and together with the exemplary embodiments of the application and their description, serve to explain the application, and do not constitute an improper limitation on the application. Among them:

[0017] Figure 1 The structural cross-sectional view of an embodiment of the application in a normal state.

[0018] Figure 2 The structural cross-sectional view of an embodiment of the application in a state of being affected by a shock wave.

[0019] Figure 3 The local connection relationship diagram of the flat key and the key groove of an embodiment of the application.

[0020] Figure 4The partial structure schematic diagram of the buffer ring and the limiting ring in the general state of an embodiment of the present application.

[0021] Figure 5 The limiting ring structure schematic diagram of an embodiment of the present application.

[0022] Figure 6 The buffer ring structure schematic diagram of an embodiment of the present application.

[0023] Figure 7 The partial structure schematic diagram of the buffer ring and the limiting ring in the general state of another embodiment of the present application.

[0024] Figure 8 The limiting ring structure schematic diagram of another embodiment of the present application.

[0025] Figure 9 The buffer ring structure schematic diagram of another embodiment of the present application.

[0026] Figure 10 The structure schematic diagram of the door frame in the installed state of still another embodiment of the present application.

[0027] Figure 11 The structure sectional view schematic diagram of the door frame in the installed state of still another embodiment of the present application.

[0028] Figure 12 The structure schematic diagram of the door frame in the installed state of still another embodiment of the present application.

[0029] Figure 13 The structure schematic diagram of the door frame in the installed state of still another embodiment of the present application.

[0030] Legend: 1, base; 2, vent hole; 3, outer sleeve; 4, limiting ring; 5, outer reset spring; 6, baffle; 7, positioning ring; 8, buffer ring; 9, inner sleeve base; 10, inner sleeve; 11, inner reset spring; 12, inner vent hole; 13, air inlet hole; 14, secondary air hole; 15, keyway; 16, flat key; 17, door frame; 18, locking mechanism; 19, hinge. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to the accompanying drawings and embodiments. Each example is provided by way of explanation of the present application and is not intended to limit the present application. In fact, those skilled in the art will appreciate that modifications and variations to the present application can be made without departing from the scope or spirit of the present application. For example, features shown as or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Thus, it is intended that the present application encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0032] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and do not require the present application to be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "connected", "connected", "provided" used in the present application should be understood broadly, for example, it can be fixedly connected or detachably connected; it can be directly connected or indirectly connected through intermediate components; the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0033] One or more examples of the present application are shown in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to label like or similar parts of the present application. As used herein, the terms "first", "second", "third", and "fourth" and the like can be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components.

[0034] Embodiment 1, as shown, according to the embodiment of the present application, provides a combined blast wave valve with two wave damping measures, comprising a base 1, a plurality of ventilation holes 2 are arranged on the base 1, a sleeve valve assembly is arranged on each ventilation hole 2, the sleeve valve assembly comprises: an outer valve unit and an inner valve unit, the outer valve unit and the inner valve unit are in communication with each other, the outer valve unit has a first ventilation port, the inner valve unit has a second ventilation port, the first ventilation port is located on one side of the base 1, the second ventilation port is located on the other side of the base 1, air can enter from the first ventilation port and be discharged from the second ventilation port; wherein, when the shock wave spreads to the outer valve unit, the outer valve unit and the inner valve unit can consume the energy of the shock wave in turn, the valve of the present application is normally open, maintaining normal ventilation in the project, when the project is attacked, the valve can be quickly closed under the action of the blast shock wave, blocking the shock wave outside the project, ensuring the safety of personnel and equipment inside the project. When the action of the shock wave disappears, the valve can move to the open position under the action of the reset mechanism (inner reset spring 11 and outer reset spring 5), ensuring that the project returns to the ventilation state.

[0035] Preferably, the outer valve unit comprises a limiting ring 4, an outer sleeve 3 and an outer reset spring 5; one end of the outer sleeve 3 is provided with a baffle 6, the outer wall of the outer sleeve 3 is provided with a positioning ring 7, the other end of the outer sleeve 3 extends into the ventilation hole 2, the outer wall of the outer sleeve 3 is in close contact with the ventilation hole 2, the limiting ring 4 is arranged on the base 1, when one end of the outer sleeve 3 moves into the ventilation hole 2, the positioning ring 7 can contact the limiting ring 4 to prevent the movement of the outer sleeve 3; the outer reset spring 5 is located in the ventilation hole 2, the inner part of the ventilation hole 2 is provided with a boss, one end of the outer reset spring 5 is connected with the boss, the other end of the outer reset spring 5 is connected with the outer sleeve 3; the first ventilation port is arranged on the outer wall of the outer sleeve 3, in normal use, air enters the ventilation hole 2 from the first ventilation port and then is discharged from the second ventilation port, so that external air can enter the room, when the shock wave comes, the outer sleeve 3 is affected by the shock wave and is "locked" into the ventilation hole 2, the positioning ring 7 contacts the buffer ring 8 and the limiting ring 4 to prevent the further movement of the outer sleeve 3, after the shock wave disappears, the outer sleeve 3 returns to the initial position under the action of the outer reset spring 5.

[0036] Preferably, the outer valve unit further comprises a buffer ring 8, which is arranged on the limiting ring 4 and between the positioning ring 7 and the buffer ring 8; the inner ring of the limiting ring 4 has an annular protrusion extending from one end close to the buffer ring 8, the annular protrusion extends into the buffer ring 8, and the outer wall of the annular protrusion is in close contact with the inner wall of the buffer ring 8; preferably, the inner sleeve 10 comprises a first part, a second part and a third part connected in sequence, the pipe diameter of the first part, the pipe diameter of the second part and the pipe diameter of the third part decrease in turn, the first part is connected with the valve base 1, the other end of the inner side reset spring 11 extends into the third part, when one end of the outer sleeve 3 moves into the ventilation hole 2, the buffer ring 8 serves as a buffer between the positioning ring 7 and the limiting ring 4, in order to prevent the outer sleeve 3 from being plastically deformed after high-speed impact with the base 1 during the damping process, and to ensure that the outer sleeve 3 can be reliably reset, the impact is absorbed by setting the buffer ring 8 and the limiting ring 4. The buffer ring 8 is arranged between the outer sleeve 3 and the base 1 and is made of a buffer energy-absorbing material, under the action of the shock wave, the outer sleeve 3 first collides with the buffer ring 8, causing the buffer ring 8 to deform greatly to dissipate the impact energy. The limiting ring 4 is made of high-strength metal and can limit the movement position of the end of the outer sleeve 3, at the same time, the limiting ring 4 can ensure that the buffer ring 8 deforms radially outward, avoiding the buffer ring 8 from deforming inwardly under the impact and flowing into the ventilation passage of the outer sleeve 3 (the outer sleeve 3 is a hollow structure, and the hollow part is the ventilation passage), thereby causing the outer sleeve 3 to be "locked" and affecting the reset function of the outer sleeve 3.

[0037] Preferably, the inner valve unit comprises an inner sleeve seat 9, an inner sleeve 10 and an inner side reset spring 11; the inner sleeve seat 9 is arranged on the other side of the base 1, one end of the inner sleeve seat 9 is in communication with the ventilation hole 2, the inner sleeve 10 and the inner side reset spring 11 are arranged in the inner sleeve seat 9, one end of the inner side reset spring 11 is connected with the inner sleeve seat 9, the inner sleeve 10 is located between the outer valve unit and the inner side reset spring 11, the other end of the inner side reset spring 11 is connected with the inner sleeve 10, the outer wall of the inner sleeve 10 is in close contact with the inner wall of the inner sleeve seat 9, and in use, the inner sleeve 10 can relieve the shock wave entering the ventilation hole 2, and the double sleeve valve assembly is used to eliminate the shock wave together, the two wave elimination measures (the outer valve unit and the inner valve unit) are tightly connected with the base 1 through 4 groups of screws, and the specific installation mode is that: the base 1 is provided with a circular hole for installing the inner sleeve 10 and the outer sleeve 3, the outer side reset spring 5 is placed in the ventilation hole 2 and is in a compressed state; one end of the outer sleeve 3 is retracted into the ventilation hole 2, and under the action of load, the outer sleeve 3 can make linear reciprocating motion in the hole. In order to ensure that the outer sleeve 3 does not pop out due to the reaction force of the outer side reset spring 5, a limiting ring 4 is arranged to limit the outward movement of the outer sleeve 3; the limiting ring 4 and the buffer ring 8 are both provided with 4 groups of screw holes, and the base 1 is provided with the same number of threaded holes, the limiting ring 4 and the buffer ring 8 are fixed with the base 1 through high-strength screws. The inner sleeve seat 9 is provided with 4 groups of screw holes, and the base 1 is provided with the same number of threaded holes, and the inner sleeve seat 9 is fixed with the base 1 through high-strength screws; the inner side of the inner sleeve seat 9 is provided with a hole for installing the inner side reset spring 11 and the inner sleeve 10; the inner side reset spring 11 is in a compressed state; one end of the inner sleeve 10 is retracted into the base 1, and under the action of load, the inner sleeve 10 can make linear reciprocating motion in the inner sleeve seat 9.

[0038] Preferably, the second ventilation port comprises an inner air hole 12 provided on the outer wall of the inner sleeve 10 and an outer air hole provided on the outer wall of the inner sleeve seat 9, the inner air hole 12 and the outer air hole are communicated when the valve is in the ventilation state, the second ventilation port can transport the air in the ventilation hole 2 to the indoor, the inner air hole 12 and the outer air hole can be staggered with the movement of the inner sleeve 10 when the inner sleeve 10 is subjected to the action of the shock wave, so as to prevent the gas from entering the indoor, the inner sleeve 10 and the outer sleeve 3 are in the form of sleeve, the first ventilation port and the second ventilation port are provided around, the inner sleeve 10 and the outer sleeve 3 are in the open state under the support of the inner side reset spring 11 and the outer side reset spring 5, the external air enters the ventilation hole 2 of the base 1 through the first ventilation port on the outer sleeve 3 under the action of the fan, then enters the inner sleeve 10 from the ventilation hole 2, and finally enters the engineering interior through the second ventilation port on the inner sleeve 10. When subjected to the action of the shock wave, the outer sleeve 3 first starts to close, and the wave is eliminated by hiding the first ventilation port in the base 1. During the closing process of the outer sleeve 3, part of the shock wave enters the ventilation hole 2 on the base 1 through the first ventilation port, drives the inner sleeve 10 to move, and when the inner air hole 12 on the inner sleeve 10 is staggered with the outer air hole on the inner sleeve seat 9, the channel for the shock wave to continue to spread to the engineering interior is cut off, that is, the wave elimination effect is achieved.

[0039] The first ventilation port comprises a group of air inlet holes, each of the group of air inlet holes comprises a plurality of air inlet holes 13, the plurality of air inlet holes 13 are provided on the outer sleeve 3, and the air inlet holes 13 are arranged symmetrically around the axis of the outer sleeve 3; the total area of all the air inlet holes 13 is the same as the minimum cross-sectional area of the ventilation hole 2; the number of the air inlet holes 13 is 4, and the local air resistance of the four air inlet holes 13 is small, but the closing stroke of the valve is large

[0040] Preferably, the door frame 17 is provided in the door frame wall, the base 1 is connected with the door frame 17, the door frame 17 is anchored in the ventilation port door frame wall and is made of four groups of angle steel spliced, and bolt holes are provided on the door frame 17, the base 1 is tightly connected with the door frame 17 through high-strength bolts, in order to prevent rust, rust-proof paint can be sprayed on the exposed surface of the equipment, and anti-corrosion oil is coated on the moving part for corrosion protection treatment.

[0041] Preferably, the inner sleeve seat 9 is provided with a keyway 15, and the inner sleeve 10 is provided with a flat key 16, which is connected with the keyway 15, so that the inner sleeve 10 can move along the keyway 15. Since the inner sleeve 10 is arranged in the inner sleeve seat 9, in order to prevent the inner sleeve 10 from rotating accidentally and causing the inner air hole 12 on the inner sleeve 10 to be blocked by the outer air hole on the inner sleeve seat 9 and affecting the ventilation effect, a set of flat keys 16 is arranged between the inner sleeve 10 and the inner sleeve seat 9 to limit the rotation movement thereof. The flat key 16 is located on the inner sleeve 10, and the keyway 15 is located on the inner sleeve seat 9.

[0042] In example 2, the difference between example 2 and example 1 is that the first ventilation port comprises two groups of air inlet holes, each group of air inlet holes comprises a plurality of air inlet holes 13, the air inlet holes 13 are arranged on the outer sleeve 3, and the air inlet holes 13 are arranged symmetrically around the axis of the outer sleeve 3; the total area of all the air inlet holes 13 is the same as the minimum cross-sectional area of the ventilation hole 2; the buffer ring 8 and the limiting ring 4 are each provided with a secondary air hole group, the secondary air hole group comprises a plurality of secondary air holes 14, and the secondary air holes 14 are arranged symmetrically around the axis of the outer sleeve 3; in the initial state, the positions of the two secondary air hole groups correspond to the positions of one of the air inlet hole groups, and when the buffer ring 8 is in contact with the positioning ring 7, external air cannot enter the ventilation hole 2 through the air inlet holes 13; the number of air inlet holes 13 in each air inlet hole group is four, and through the form of double rows of eight air inlet holes 13, the total area of the air inlet holes 13 is approximately equal to the minimum cross-sectional area of the ventilation hole 2 in the base 1, the closing stroke is shorter, but the local ventilation resistance is higher.

[0043] In example 3, the difference between example 3 and example 1 is that it further comprises a door frame 17, a door frame wall and a locking mechanism 18, the door frame 17 is connected to the door frame wall through a hinge 19, the base 1 is connected to the door frame 17, the locking mechanism 18 is arranged on the base 1, the door frame 17 is provided with a lock hole, and the locking mechanism 18 can be used in cooperation with the lock hole to lock the door frame 17. The door frame 17 and the hinge 19 seat are anchored in the door frame wall, the door frame 17 is made of four groups of angle steel tailor-welded, one end of the hinge 19 is installed on the hinge 19 seat, the other end is connected to the base 1 (door leaf) through the hinge 19 arm, and the base 1 (door leaf) can be smoothly opened and closed around the hinge 19 shaft; the lock is installed on the base 1 (door leaf), the lock hole is arranged on the door frame 17, and the locking mechanism 18 can be used to lock the base 1 (door leaf), and can also bear the impact wave negative pressure and the rebounding action of the base 1 (door leaf). In order to facilitate installation, hooks are arranged on the top of the base 1 (door leaf) and the top of the door frame wall.

[0044] The embodiment 4 is different from the embodiment 3 in that a door frame 17 is connected to the base 1 through a hinge 19, a door frame wall, and a locking mechanism 18 arranged on the base 1, the door frame 17 is provided with a lock hole, and the locking mechanism 18 can be used in cooperation with the lock hole to lock the door frame 17. The first ventilation port includes two air inlet hole groups, each of which includes a plurality of air inlet holes 13 arranged on the outer sleeve 3 and symmetrically around the axis of the outer sleeve 3, and the total area of all the air inlet holes 13 is the same as the minimum cross-sectional area of the ventilation hole 2. The buffer ring 8 and the limiting ring 4 are each provided with a secondary air hole group including a plurality of secondary air holes 14 symmetrically arranged around the axis of the outer sleeve 3. In the initial state, the positions of the two secondary air hole groups correspond to the positions of one air inlet hole group, and when the buffer ring 8 is in contact with the positioning ring 7, external air cannot enter the ventilation hole 2 through the air inlet hole 13. The number of air inlet holes 13 in each air inlet hole group is four.

[0045] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0046] The present application relates to a combined blast wave valve with two wave absorbing measures. The blast wave valve can provide efficient and reliable protection for the ventilation port of a protective engineering, significantly improve the engineering protection capability, and protect the safety of personnel and equipment inside the engineering. The blast wave valve has the following characteristics: under the condition of consistent ventilation volume of the valve, the valve is designed to be composed of a plurality of sleeve valve units; a combined wave absorbing scheme of an outer sleeve 3 and an inner sleeve 10 is designed, thereby realizing the function of providing two wave absorbing measures on one valve device; a buffer scheme of a buffer ring 8 and a limiting ring 4 is proposed, which solves the technical problems of impact energy dissipation and prevention of valve "locking", and ensures that the components of the valve can return to the initial ventilation position after the action of the shock wave. Two first ventilation port arrangement schemes are proposed, which can be flexibly selected according to the protection requirements of the actual engineering during design. Two blast wave valve installation schemes are proposed, which can be selected individually or in combination for engineering.

[0047] The present application is based on the existing suspension type blast wave valve and rubber tube type valve, and proposes a new blast wave valve with good wave absorbing performance, reliable strength and compact structure. Compared with similar products, the present application has the following advantages and characteristics: first, under the condition of consistent valve ventilation volume, the valve is designed to be composed of several sleeve type valve units, which is beneficial to reduce the mass of the valve moving parts, improve the closing speed and wave absorption rate of the valve, and significantly reduce the overall impact of the moving parts on the base, ensuring the strength and reliability of the valve; second, a combination of outer sleeve and inner sleeve wave absorbing scheme is designed, thereby realizing the function of providing two wave absorbing measures on one valve device, so that the valve has good wave absorbing performance under the action of different intensity shock waves; third, in order to ensure that the valve moving parts do not deform significantly after impact and can be reliably reset, a reliable buffer energy absorbing measure is proposed, and a buffer ring plus limit ring buffer scheme is designed, so that the impact energy can be quickly dissipated through the large deformation of the buffer energy absorbing material, ensuring the strength and reliability of the valve. On the other hand, the limit ring limits the flow direction of the deformation of the buffer energy absorbing material, effectively avoiding the problem of valve "locking" caused by the material flowing into the ventilation hole, and ensuring that the valve components can return to the initial ventilation position after the impact of the shock wave. Fourth, two ventilation hole arrangement schemes are proposed, one of which is to arrange four air inlet holes 13 in a single row on the side of the outer sleeve, and the other of which is to arrange eight air inlet holes 13 in a double row on the side of the outer sleeve. The former has smaller local wind resistance, but the valve closing stroke is larger; the latter has larger local wind resistance, but the closing stroke is smaller. In the design, the actual engineering protection requirements can be flexibly selected. Fifth, two sealing door installation schemes are proposed, namely door type valve and sealing type valve. The door type valve is provided with a hinge mechanism, which can be opened in normal times to ensure a larger ventilation volume and lower ventilation resistance inside the project, and the door leaf is closed to achieve the protection effect when the war is imminent. This form of valve needs to reserve civil engineering space for opening and closing of the door leaf in the design; the sealing type valve is fixed on the door frame wall by bolts, and cannot be opened in normal times, and is always in a closed state. This form does not need to reserve civil engineering space, which is beneficial to reduce the construction cost of the project.

[0048] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A combined explosion-proof wave valve with two wave-damping measures, characterized in that, The base includes a plurality of ventilation holes, each of which is equipped with a sleeve-type valve assembly, the sleeve-type valve assembly comprising: An outer valve unit and an inner valve unit are connected to each other. The outer valve unit has a first vent, and the inner valve unit has a second vent. The first vent is located on one side of the base, and the second vent is located on the other side of the base. Air can enter through the first vent and exit through the second vent. When the shock wave spreads to the outer valve unit, the outer valve unit and the inner valve unit can sequentially consume the energy of the shock wave. The outer valve unit includes a limiting ring, an outer sleeve, and an outer return spring; One end of the outer sleeve is provided with a baffle, and the outer wall of the outer sleeve is provided with a positioning ring. The other end of the outer sleeve extends into the ventilation hole, and the outer wall of the outer sleeve fits against the ventilation hole. The limiting ring is provided on the base. When one end of the outer sleeve moves into the ventilation hole, the positioning ring can contact the limiting ring to prevent the outer sleeve from moving. The outer return spring is located inside the ventilation hole, and a boss is provided inside the ventilation hole. One end of the outer return spring is connected to the boss, and the other end of the outer return spring is connected to the outer sleeve. The first vent is located on the outer wall of the outer sleeve; The external valve unit further includes a buffer ring, which is disposed on the limiting ring and is located between the positioning ring and the limiting ring; The inner ring of the limiting ring extends an annular protrusion near one end of the buffer ring. The annular protrusion extends into the buffer ring, and the outer wall of the annular protrusion fits against the inner wall of the buffer ring. When one end of the outer sleeve moves into the ventilation hole, the buffer ring acts as a buffer between the positioning ring and the limiting ring; The first vent includes two air inlet groups, each air inlet group including multiple air inlets, all of which are provided on the outer sleeve and are symmetrically arranged around the axis of the outer sleeve; The total area of ​​all the air inlets is the same as the minimum cross-sectional area of ​​the ventilation holes; Both the buffer ring and the limiting ring are provided with a secondary air hole group, the secondary air hole group includes multiple secondary air holes, and the secondary air holes are symmetrically arranged along the axis of the outer sleeve; In the initial state, the positions of the two secondary air vent groups correspond to the position of one of the air inlet vent groups, and when the buffer ring is in contact with the positioning ring, outside air cannot enter the ventilation hole through the air inlet vent. It also includes a door frame and a door frame wall, wherein the door frame is located in the door frame wall and the base is connected to the door frame.

2. The combined explosion-proof valve with two wave-damping measures according to claim 1, characterized in that, The inner valve unit includes an inner sleeve seat, an inner sleeve, and an inner return spring. The inner sleeve seat is located on the other side of the base. One end of the inner sleeve seat is connected to the ventilation hole. The inner sleeve and the inner return spring are both located inside the inner sleeve seat. One end of the inner return spring is connected to the inner sleeve seat. The inner sleeve is located between the outer valve unit and the inner return spring. The other end of the inner return spring is connected to the inner sleeve. The outer wall of the inner sleeve is in contact with the inner wall of the inner sleeve seat. The inner sleeve seat includes a first part, a second part, and a third part connected in sequence. The diameter of the first part, the second part, and the third part decreases sequentially. The first part is connected to the valve base, and the other end of the inner return spring extends into the third part.

3. A combined explosion-proof wave valve with two wave-damping measures according to claim 2, characterized in that, The second ventilation opening includes an inner air hole and an outer air hole. The inner air hole is located on the outer wall of the inner sleeve, and the outer air hole is located on the outer wall of the inner sleeve seat. When the valve is in the ventilation state, the inner air hole and the outer air hole are connected.

4. A combined explosion-proof wave valve with two wave-damping measures as described in claim 1, characterized in that, The number of air inlets in each air inlet group is 4.

5. A combined explosion-proof wave valve with two wave-damping measures according to claim 2, characterized in that, The inner sleeve seat is provided with a keyway, and the inner sleeve is provided with a flat key. The flat key is connected to the keyway, so that the inner sleeve can move along the keyway.

6. A combined explosion-proof wave valve with two wave-damping measures as described in claim 1, characterized in that, It also includes a door frame, a door frame wall, and a locking mechanism. The base is connected to the door frame via a hinge. The door frame is located in the door frame wall. The locking mechanism is located on the base. The door frame has a lock hole. The locking mechanism can be used in conjunction with the lock hole to lock the base.

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