Explosion-proof overpressure exhaust valve

Abstract

The utility model discloses an anti-explosion overpressure exhaust valve, belongs to the technical field of safety protection equipment, and provides an anti-explosion overpressure exhaust valve not prone to being damaged. The anti-explosion overpressure exhaust valve comprises a valve body and a base, a mounting sleeve is fixedly connected to the edge of the base, a blocking ring is arranged at the end of the mounting sleeve, and a guide hole is formed in the center of the blocking ring; the outer side edge of the door body is fixedly connected with a guide rod through an extending lug and suitable for penetrating through the guide hole to form a sliding pair, the end, penetrating through the guide hole, of the guide rod is further fixedly connected with a limiting ring, the guide rod is further sleeved with a spring, and the spring is located between the extending lug and the blocking ring. The guide rod and the spring structure are arranged between the door body and the base, so that the door body can be effectively buffered when the door body is close to the base when bearing ultrahigh pressure of explosion, the probability of damage to the door body is reduced, the door body can be reset and far away from the base under the action of return elastic force of the spring after explosion shock waves, and the safety of the door body is improved. And the end part of the clearance pipeline is opened to keep a ventilation state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety protection equipment, in particular to an explosion-proof overpressure exhaust valve. BACKGROUND

[0002] Civil air defense shelters are mainly used as air defense command centers, communication centers and hidden places during wartime. In order to protect people's lives and safety, civil air defense shelters need to be equipped with ventilation systems to ensure that fresh air enters the interior of the civil air defense shelter.

[0003] An explosion-proof overpressure exhaust valve also needs to be installed at the air outlet ventilation port to block or weaken the weapon damage effect from entering the interior of the project. It can be automatically closed when the explosion shock wave arrives, protecting the safety of the exhaust system pipeline. When the internal and external pressures are balanced, it can automatically open the ventilation and exhaust to ensure the safety of the people seeking refuge inside the civil air defense project. The bracket used to connect the valve housing and the exhaust valve in the prior art is usually fixed rigid connection, which is easy to be damaged after encountering explosion wave impact, and the entire valve needs to be replaced, increasing the use cost. SUMMARY

[0004] The purpose of the present application is to provide an explosion-proof overpressure exhaust valve that is not easy to be damaged.

[0005] To achieve the above purpose, the present application provides an explosion-proof overpressure exhaust valve: including a door body and a base, the edge of the base is fixedly connected with a mounting sleeve, the end of the mounting sleeve has a blocking ring, the center of the blocking ring has a guide hole, the outer side of the door body is fixedly connected with a guide rod through an extension ear, which is suitable for passing through the guide hole to form a sliding pair, one end of the guide rod passing through the guide hole is also fixedly connected with a limiting ring, the guide rod is further sleeved with a spring, the spring is located between the extension ear and the blocking ring, and is used to provide a restoring force of the door body away from the base.

[0006] As a preferred, the door body includes a sunken disc, the end of the sunken disc has an inlaid cone, the base includes a tapered sleeve, the end of the tapered sleeve is fixedly connected with a fixed disc through a reinforcing ring, the end face of the reinforcing ring is provided with a recessed groove suitable for engaging with the sunken disc, and the inlaid cone is suitable for engaging with the inner wall of the tapered sleeve, so as to form an annular stepped sealing surface that prevents airflow from passing through.

[0007] As a preferred, the extension ear is located on the outer side of the sunken disc, and the number of the extension ear is several, and these extension ears are equidistantly arranged around the axis of the sunken disc. The center of gravity of the entire door body is located on the geometric center line of itself.

[0008] As a preferred, the number and position of the mounting sleeve correspond to the extension ear, the fixing disc is provided with a connecting hole penetrating the front and rear end faces between the mounting sleeves, and a connecting member such as an expansion nail is arranged to pass through the connecting hole to fasten the fixing disc on the building wall.

[0009] As a preferred, the central part of the recessed disc is further provided with a weight reduction groove, which reduces the material consumption and self weight under the premise of ensuring the structural strength, so as to realize better light weight.

[0010] As a preferred, the fixing disc, the reinforcing ring and the conical pipe sleeve are integrated, the fixing disc and the reinforcing ring are located outside the conical pipe sleeve and coaxial with the conical pipe sleeve, and the center of gravity of the whole base is also located on the geometric center line thereof.

[0011] As a preferred, the recessed disc, the embedded cone and the extension ear are integrated, the reinforcing ring is provided with a rubber pad on the inner wall of the accommodation groove, which is used to reduce the hard contact between the door body and the base, so that the door body has a certain buffer when cooperating with the base.

[0012] As a preferred, the guide rod is welded with the extension ear, and the limiting ring is threadedly connected with the guide rod, so as to ensure that the guide rod can be normally disassembled and assembled.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] (1) By arranging the guide rod and the spring structure between the door body and the base, the door body can be effectively buffered when being close to the base under the super-high pressure of explosion, so as to reduce the probability of damage of the door body, and after the explosion shock wave, the door body can be reset away from the base under the action of the return elastic force of the spring, so that the end part of the passageway is opened to maintain the ventilation state;

[0015] (2) Since the base directly contacting with the wall is less likely to be damaged, by arranging the detachable limiting ring structure at the end part of the guide rod, even if the door body is damaged under the action of the strong shock wave, the door body can be conveniently replaced, and the whole exhaust valve does not need to be replaced, so that the use cost is also lower. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a first three-dimensional schematic view of the overall structure of the explosion-proof super-pressure exhaust valve.

[0017] Figure 2 It is a second three-dimensional schematic view of the overall structure of the explosion-proof super-pressure exhaust valve.

[0018] Figure 3 It is a three-dimensional sectional view of the overall structure of the explosion-proof super-pressure exhaust valve.

[0019] Figure 4 Figure 6 is a perspective view of the spring and the door body of the explosion-proof overpressure exhaust valve.

[0020] Figure 5 Figure 7 is a sectional view of the door body of the explosion-proof overpressure exhaust valve.

[0021] Figure 6 Figure 8 is a sectional view of the spring and the base of the explosion-proof overpressure exhaust valve.

[0022] Figure 7 Figure 9 is a sectional view of the base of the explosion-proof overpressure exhaust valve. Figure 6 Figure 10 is an enlarged view of part A of Figure 9.

[0023] Figure 8 Figure 11 is a perspective view of the base of the explosion-proof overpressure exhaust valve.

[0024] In the figure: 1, door body; 101, guide rod; 102, limiting ring; 103, extension ear; 104, load reduction groove; 105, sunken disc; 106, inlaid cone; 2, base; 201, fixed disc; 202, mounting sleeve; 203, blocking ring; 204, guide hole; 205, clearance groove; 206, cone pipe sleeve; 207, connecting hole; 208, reinforcing ring; 3, spring. DETAILED DESCRIPTION

[0025] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that, without conflict, the following described embodiments or technical features can be combined in any manner to form new embodiments.

[0026] In the description of the present application, it should be noted that, for orientation words, such as the terms “center”, “transverse”, “longitudinal”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0027] It should be noted that the terms “first”, “second”, etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0028] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0029] like Figures 1-8 The explosion-proof overpressure exhaust valve shown includes a door body 1 and a base 2 that cooperate with each other. The base 2 is directly connected to the end of the exhaust duct and fixed to a sturdy building structure, such as a wall. A hollow mounting sleeve 202 is fixedly connected to the edge of the base 2. The base 2 also has a hole structure that communicates with the interior of the mounting sleeve 202. The end of the mounting sleeve 202 has a blocking ring 203, which is integrated with the mounting sleeve 202. The center of the blocking ring 203 has a guide hole 204 that is coaxial with the mounting sleeve 202. The outer side of the door body 1 is fixedly connected to a guide rod 101 through an extension lug 103. Under normal circumstances... Below, the guide rod 101 is welded and fixed to the extension ear 103. The guide rod 101 is used to pass through the guide hole 204 and form a sliding pair. One end of the guide rod 101 that passes through the guide hole 204 is also fixedly connected to a limit ring 102 to prevent the guide rod 101 from separating from the guide hole 204. The limit ring 102 is threadedly connected to the guide rod 101 to ensure that the guide rod 101 can be smoothly installed and removed. A spring 3 is also sleeved on the outside of the guide rod 101. Most of the spring 3 is located inside the mounting sleeve 202, and the spring 3 is located between the extension ear 103 and the blocking ring 203 to provide the door body 1 with a support force away from the base 2.

[0030] The specific structure of the door body 1 includes an inner recessed plate 105, and extension ears 103 are located on the outer side of the inner recessed plate 105. There are several extension ears 103, which are equidistantly arranged around the axis of the inner recessed plate 105. The inner recessed plate 105, the inner cone 106, and the extension ears 103 are an integral structure that can be integrally formed by casting, which is very efficient. In this embodiment, three extension ears 103 are provided. The number and position of the mounting sleeves 202 correspond to the extension ears 103 and are used to cooperate with the three guide rods 101 and the spring 3. A pressure-reducing groove 104 is also provided in the center of the inner recessed plate 105. Under the premise of ensuring that the inner recessed plate 105 has sufficient structural strength to resist the impact pressure during an explosion, the material consumption is reduced and the weight is reduced to achieve better lightweighting. Since the pressure-reducing groove 104 is located on the end face of the inner recessed plate 105 facing away from the base 2, it can withstand the impact pressure, so that the door body 1 is close to the base 2, thereby blocking the open port of the ventilation duct.

[0031] The end of the inner recessed disc 105 is provided with an inner embedded cone 106, the base 2 comprises a conical pipe sleeve 206, the end of the conical pipe sleeve 206 is fixedly connected with a fixed disc 201 through a reinforcing ring 208, in fact, the fixed disc 201, the reinforcing ring 208 and the conical pipe sleeve 206 are integrated, and the fixed disc 201 and the reinforcing ring 208 are both located outside the conical pipe sleeve 206 and coaxial with the conical pipe sleeve 206, the fixed disc 201 is provided with a connecting hole 207 penetrating the front and back end faces between the mounting sleeves 202, for the connecting member such as expansion nails to pass through, so as to fix the fixed disc 201 on the solid building body, since the mounting sleeves 202 are actually also fixed on the fixed disc 201, the mounting sleeves 202 will also be inserted into the building body, the end face of the reinforcing ring 208 is provided with a recess slot 205, which is just matched with the inner recessed disc 105, and the inner embedded cone 106 is matched with the inner wall of the conical pipe sleeve 206 at the same time when the inner recessed disc 105 is matched with the recess slot 205, so as to form a ring-shaped stepped sealing surface, therefore, even without the soft and elastic sealing member, the door body 1 can be tightly matched with the base 2 to avoid the high-pressure gas entering the ventilation duct when the explosion occurs.

[0032] However, generally, a rubber pad is arranged on the inner wall of the recess slot 205 of the reinforcing ring 208, which is used to reduce the hard contact between the door body 1 and the base 2, so as to improve the stability and reliability after the tight matching of the door body 1 and the base 2.

[0033] Working principle: before use, firstly, the guide rod 101 is inserted through the corresponding mounting sleeve 202 and is constrained by the limiting ring 102, at this time, all the springs 3 are in a relatively long compressed state, the door body 1 is relatively far away from the base 2, and the air can pass between the door body 1 and the base 2, then the conical pipe sleeve 206 of the base 2 is inserted into the ventilation duct end of the civil air defense project, finally, the fixed disc 201 is fixed with the wall of the building, when the explosion occurs outside the building, the strong impact pressure acts on the door body 1, so as to force the spring 3 to compress, the guide rod 101 is further inserted into the mounting sleeve 202, the door body 1 is matched with the base 2 in an instant, and the high-speed airflow is blocked outside the ventilation duct, so as to ensure the safety and working stability of the ventilation system of the civil air defense project, when the shock wave passes, the door body 1 is away from the base 2 under the action of the returning elastic force of the spring 3, so that the ventilation duct of the civil air defense project can continue to work, thereby ensuring the safety of the refuge personnel in the civil air defense project.

[0034] The above describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only the principles of the present application, various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The protection scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An explosion relief overpressure exhaust valve characterized by: The utility model provides a door body (1) and pedestal (2), the edge of pedestal (2) is fixedly connected with the installation sleeve (202), the end of installation sleeve (202) has the blocking ring (203), the central part of blocking ring (203) has the guide hole (204), the outside side of door body (1) is fixedly connected with the guide rod (101) through the extension ear (103), is suitable for passing through the guide hole (204) and constitutes the sliding pair, the end of guide rod (101) passes through the guide hole (204) still fixedly connected with the limit ring (102), the guide rod (101) still sets up the spring (3) outside, the spring (3) is located between extension ear (103) and blocking ring (203).

2. The explosion relief overpressure exhaust valve of claim 1, wherein: The door body (1) includes an inwardly recessed disc (105) having an inwardly embedded taper (106), and the pedestal (2) includes a tapered tube sleeve (206) having a fixed disc (201) fixedly connected to the end thereof through a reinforcing ring (208), an end surface of the reinforcing ring (208) being provided with a clearance slot (205) suitable for engaging with the inwardly recessed disc (105), and the inwardly embedded taper (106) being suitable for engaging with the inner wall of the tapered tube sleeve (206).

3. The explosion relief overpressure exhaust vent of claim 2, wherein: The extension ears (103) are located on the outer side of the inwardly recessed disc (105), and a plurality of the extension ears (103) are equidistantly arranged around the axis of the inwardly recessed disc (105).

4. The explosion relief overpressure exhaust valve of claim 3, wherein: The number and position of the installation sleeves (202) correspond to those of the extension ears (103), and the fixed disc (201) is provided with a through hole (207) penetrating through the front and rear end surfaces between the installation sleeves (202).

5. An explosion relief overpressure exhaust vent as defined in claim 4, wherein: The inwardly recessed disc (105) is further provided with a weight-reducing slot (104) in the center thereof.

6. An explosion relief overpressure exhaust valve according to any one of claims 2 to 5, characterised in that: The fixed disc (201), the reinforcing ring (208), and the tapered tube sleeve (206) are of an integrated structure, the fixed disc (201) and the reinforcing ring (208) being located outside the tapered tube sleeve (206) and coaxial with the tapered tube sleeve (206).

7. An explosion relief overpressure exhaust vent as defined in claim 6, characterized in that: The inwardly recessed disc (105), the inwardly embedded taper (106), and the extension ears (103) are of an integrated structure, and the reinforcing ring (208) is provided with a rubber pad on the inner wall of the clearance slot (205).

8. An explosion relief overpressure exhaust vent as defined in claim 7, characterized in that: The guide rod (101) is welded to the extension ear (103), and the limit ring (102) is threadedly connected to the guide rod (101).

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