A protective structure for valves at openings in a closed space of a detonation experiment

Abstract

The invention discloses a protective structure for a valve at an opening of a closed space in a detonation experiment, which is mainly composed of an inner protective cover and an outer protective cover. It can not only meet the safety protection of the valve under the combined damage of air shock waves and fragment groups generated by explosives, but also has the advantages of low cost, simple structure, safety and reliability. It can be conveniently applied to the safety protection of valves at the openings of various closed spaces in detonation experiments.

Description

Technical Field

[0001] The invention belongs to the technical field of detonation protection, and in particular relates to a protection structure of a valve at an opening of a closed space in a detonation experiment. Background Art

[0002] When conducting detonation experiments, explosion containers and explosion towers are used to shield and isolate explosion shock waves, limit the scope of action of explosion products and fragments, and effectively protect the safety of personnel, equipment and the environment. They are widely used in defense, industry, scientific research and public safety. In defense and military, they are important experimental sites for weapons research and are used to store and transport weapons and ammunition; in industrial production, they can provide safe processing sites for production processes such as explosive welding; in scientific research, they can safely and conveniently study the explosion process; in public safety, explosion containers are important explosion-proof equipment in public places such as stations, airports and important venues.

[0003] So far, explosion containers and explosion towers have been widely used. After such confined space experiments, exhaust and other procedures are required to ensure that the toxic and harmful explosion products inside are discharged to prevent harm to the human body. Therefore, the design of confined spaces such as explosion containers and explosion towers is generally equipped with exhaust and air intake valves. However, the air shock wave and fragment group generated by the explosion of the experimental object have a great impact on the service life of the valve. The impact of the air shock wave will seriously affect the sealing performance and opening function of the valve, and the high-speed fragments will directly penetrate the valve gate and cause damage. In actual applications, valve manufacturers generally increase the impact resistance of the valve by strengthening the design a lot, but the production cost of this kind of explosion-proof valve is very high, and the process is also very complicated. Summary of the invention

[0004] In view of this, in order to achieve protection of valves at openings of a closed space against explosion impact, the present invention provides a protection structure for valves at openings of a closed space in a detonation experiment.

[0005] To achieve this purpose, the present invention specifically adopts the following technical solutions:

[0006] A protective structure for a valve at an opening in a confined space of a detonation experiment, characterized in that the protective structure comprises an outer protective cover and an inner protective cover arranged on the inner wall of the confined space, the outer protective cover is provided with a plurality of outer protective cover openings, and the inner protective cover is provided with a plurality of inner protective cover openings.

[0007] Furthermore, the openings of the outer protective cover and the openings of the inner protective cover are arranged alternately.

[0008] Furthermore, the inner and outer protective covers are both hemispherical structures.

[0009] Furthermore, the inner and outer protective covers are both made of 45 steel.

[0010] Furthermore, the thickness of the inner and outer protective covers depends on the reflected overpressure of the air shock wave.

[0011] Furthermore, the total area of ​​the openings of the outer protective cover is not greater than 1 / 3 of the outer protective cover body; the total area of ​​the openings of the inner protective cover is not greater than 1 / 3 of the inner protective cover body.

[0012] The present invention also provides an application of a protective structure for a valve at an opening in a closed space of the aforementioned detonation experiment, characterized in that the protective structure for the valve at the opening is applied to an explosion container or an explosion tower.

[0013] This patented protective structure uses a double-layer protective cover to prevent the valve from being penetrated and damaged by fragments, and to reduce the reflected overpressure of the air shock wave impacting the valve, thereby protecting the valve.

[0014] The beneficial effects of the present invention are simple structure, safety and reliability, low cost and good valve protection effect.

[0015] The present invention provides a protective design for the valve at the opening of the explosion container or explosion tower, thereby greatly reducing the damage to the valve caused by the high-speed fragment group generated by the explosion, greatly weakening the reflected overpressure of the air shock wave directly acting on the valve, achieving effective protection of the valve and reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the protective structure of the valve at the opening of the closed space in the detonation experiment;

[0017] In the figure, 1. Inner wall of enclosed space 2. Outer protective cover 3. Opening of outer protective cover 4. Inner protective cover 5. Opening of inner protective cover 6. Inlet / exhaust duct 7. Valve 8. Explosive. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, the protective structure of the valve at the opening of the closed space in the detonation experiment of the present invention includes an outer protective cover 2 and an inner protective cover 4 arranged on the inner wall 1 of the closed space, the outer protective cover 2 is provided with an outer protective cover opening 3, and the inner protective cover is provided with an inner protective cover opening 5.

[0020] When installing the protective structure of the present invention, firstly, the small-diameter inner protective cover 4 is welded and fixed to the inner wall of the explosion container explosion tower and located at the inlet / exhaust opening, and then the large-diameter outer protective cover 2 is installed on the inner wall of the explosion container explosion tower and located outside the inner protective cover 4.

[0021] When conducting a test in an explosion container or explosion tower and other confined spaces of explosion impact, when the shock wave and fragments reach the outer protective cover 2, they are first mostly reflected by the outer protective cover, and the fragments passing through the opening 3 of the outer protective cover are completely protected by the inner protective cover 4, while the air shock wave passing through the opening 3 of the outer protective cover is mostly reflected by the inner protective cover 4, and a very small part passes through the opening 5 of the inner protective cover into the inlet / exhaust duct 6 to impact the valve 7, but the impact energy is very small and will not affect the safety and use of the valve.

[0022] Furthermore, the outer protective cover openings 3 and the inner protective cover openings 5 ​​are arranged alternately, and ensure that the valve 7 and the explosive 8 cannot be connected in a straight line through the small holes of the inner and outer protective covers, so as to avoid the valve being directly exposed to the explosive through the two small holes.

[0023] Furthermore, the inner and outer protective covers are both hemispherical structures to ensure good force-bearing performance.

[0024] Furthermore, the inner and outer protective covers are made of No. 45 steel or high-strength steel.

[0025] The present invention can determine the thickness and diameter of the inner and outer protective cover bodies and the size of the protective cover opening according to the equivalent weight used and the volume of the enclosed space.

[0026] Further, the thickness of the inner and outer protective shields depends on the reflected overpressure of the air shock wave. In addition, the diameter of the inner and outer protective shield bodies is adjusted according to the explosion equivalent.

[0027] Furthermore, the total area of ​​the openings 3 of the outer protective cover is not greater than 1 / 3 of the outer protective cover 2 body; the total area of ​​the openings 5 ​​of the inner protective cover is not greater than 1 / 3 of the inner protective cover 4 body.

[0028] The present invention also provides an application of a protective structure for valves at the opening of a closed space in the above-mentioned detonation experiment, and the protective structure for valves at the opening is applied to detonation experiments in closed spaces such as explosion containers and explosion towers. Through the impact protection of the inlet and exhaust valves at the opening structure of the present invention, the damage to the inlet and exhaust valves caused by shock waves and high-speed fragment groups in closed spaces such as explosion containers and explosion towers is greatly reduced.

Claims

1. A protective structure for a valve at an opening in a closed space of a detonation experiment, characterized in that: The protective structure comprises an outer protective cover (2) and an inner protective cover (4) arranged on the inner wall (1) of the enclosed space, the outer protective cover (2) being provided with a plurality of outer protective cover openings (3), and the inner protective cover being provided with a plurality of inner protective cover openings (5); the outer protective cover openings (3) and the inner protective cover openings (5) are arranged in a staggered manner; the inner and outer protective covers are both hemispherical structures, and there is a space gap between the outer protective cover (2) and the inner protective cover (4); the inner and outer protective covers are both made of 45# steel, and the thickness of the inner and outer protective covers depends on the reflected overpressure of the air shock wave.

2. The protective structure of the valve at the opening of the closed space in the detonation experiment according to claim 1 is characterized in that: The total area of ​​the openings (3) of the outer protective cover is no greater than 1 / 3 of the outer protective cover (2) cover body; the total area of ​​the openings (5) of the inner protective cover is no greater than 1 / 3 of the inner protective cover (4) cover body.

3. An application of a protective structure for a valve at an opening of a closed space in a detonation experiment according to any one of claims 1 to 2, characterized in that: The valve protection structure at the opening is applied to an explosion container or an explosion tower.

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