Silencer and flame trap

Abstract

The utility model belongs to the technical field of noise and flame elimination equipment, and specifically discloses a noise and flame elimination device which comprises a noise and flame elimination shell, the noise and flame elimination shell is hollow annular, noise and flame elimination agents are filled in the noise and flame elimination shell, and the noise and flame elimination shell is crushed under the action of high-temperature and high-pressure gas. The utility model adopts two-phase mixed combustion noise reduction and flame elimination technology, so that the emission noise is greatly reduced, when the initial speed of the projectile is about 200m / s, the emission noise can be reduced to between 170 decibels and 175 decibels under the condition of open field, and when the emission is carried out in a limited space, the emission noise can be reduced to between 180 decibels and 185 decibels, the emission noise can be obviously reduced, the sound pressure can be reduced to 1 / 3 of the noise and flame elimination device without being installed, the flame is wrapped by the atomization of the emission port and the tail calcium chloride solution of the emission object after the emission, the emission port light and the emission tail flame can be obviously reduced, and there is basically no visible light; when the emission is carried out in a limited space, the training clothes can be kept complete, and the clothes are not burnt, penetrated or ignited by the tail flame or the back spray.

Description

Technical Field

[0001] This utility model relates to the technical field of noise reduction and flame extinguishing equipment, and in particular to a noise reduction and flame extinguishing device. Background Technology

[0002] In existing technologies, powered or recoilless launch systems primarily utilize rocket engines or launch tubes. For propellants requiring high density, the launch port velocity is often high, typically around 200 m / s, classifying the propulsion system as a short-duration, high-thrust type. The specific drawbacks of this type of propulsion system are as follows: 1. The emission noise is high, generally between 180 and 185 decibels in open fields, and can reach over 190 decibels when emitted in confined spaces. 2. After launch, there is a noticeable flash at the launch port, and the tail of the projectile has a large tail flame and hard afterburner. When launched in a confined space, it is easy to burn the operator. Utility Model Content

[0003] In view of this, in order to solve the problems of high noise and obvious flame in the prior art, this utility model proposes a noise reduction and flame suppression device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A noise reduction and flame extinguishing device includes a noise reduction and flame extinguishing shell, which is a hollow annular shape. The noise reduction and flame extinguishing shell is filled with a noise reduction and flame extinguishing agent. The noise reduction and flame extinguishing shell will be crushed by the action of high temperature and high pressure combustion gas.

[0005] As a further improvement to the above technical solution: An optimized version of the above technical solution is that one end of the silencing and flame-extinguishing housing is provided with an avoidance groove to avoid the ignition device.

[0006] An optimized version of the above technical solution is that the other end of the silencing and flame-extinguishing housing is provided with an injection groove and an exhaust port, and an injection plug and an exhaust plug are respectively provided on the injection groove and the exhaust port.

[0007] An optimized version of the above technical solution is that both the injection plug and the vent plug are made of silicone rubber.

[0008] An optimized version of the above technical solution is that the inside of the silencing and flame extinguishing shell is provided with several annular baffles, which divide the inside of the silencing and flame extinguishing shell into several water tanks.

[0009] An optimized version of the above technical solution is that the annular retaining ring is provided with a plurality of flow holes.

[0010] An optimized version of the above technical solution is that the silencing agent is a calcium chloride solution.

[0011] An optimized version of the above technical solution is that the sound-absorbing and flame-extinguishing shell is made of photosensitive resin.

[0012] Compared with existing technologies, the beneficial effects of this utility model are: 1. This utility model adopts two-phase mixed combustion noise reduction and flame extinguishing technology, which greatly reduces the launch noise. When the initial velocity of the projectile is about 200m / s, the launch noise can be reduced to 170-175 dB in open field conditions, and to 180-185 dB when launched in a confined space. It can significantly reduce the launch noise, and the sound pressure can be reduced to 1 / 3 of that without the addition of a noise reduction and flame extinguishing device. After launch, the calcium chloride solution at the launch port and the tail of the projectile is atomized to envelop the flame, which can significantly reduce the flame at the launch port and the launch tail flame, with basically no visible flame. When launched in a confined space, it can keep the training uniform intact and prevent it from being burned, penetrated or ignited by the tail flame or the afterburner.

[0013] 2. The casing of the silencing and flame-extinguishing device is made of low-density, low-mass photosensitive resin, and uses liquid silencing and flame-extinguishing agent, so that the sprayed material after launch is unlikely to cause harm to personnel in the launch room.

[0014] 3. This utility model can be applied not only to the dynamic balancing device of powered launch or recoilless launch platform, but also to products such as artificial rain bombs and civil aircraft. It can also be applied when a cooling and noise reduction launch environment is required. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall and partial explosion-proof three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0016] In the diagram: 1. Silencer and flame suppressor housing; 2. Clearance groove; 3. Injection groove; 4. Exhaust port; 5. Injection plug; 6. Exhaust plug; 7. Circular retaining ring; 8. Flow hole; 9. Silencer and flame suppressant. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] As attached Figure 1 To be continued Figure 3 As shown, this technical solution is mainly used for noise reduction and flame suppression in power plants that require high density of propellant, have high launch velocity, and belong to the short-time high-thrust series. This technical solution mainly consists of a noise reduction and flame suppression shell 1, a noise reduction and flame suppression agent 9, an injection plug 5, and an exhaust plug 6.

[0021] The silencing and flame-extinguishing shell 1 is formed using 3D printing technology, and the material is photosensitive resin. Its outer structure is a hollow ring, and a clearance groove 2 is provided at one end to avoid the ignition device. The inner structure is equipped with four water tanks, which are mainly blocked by three layers of annular baffle rings 7. At the same time, flow holes 8 are provided on the annular baffle rings 7 to facilitate the flow of the agent. This prevents structural damage caused by piping effect during operation. The number of annular baffle rings 7 can be appropriately increased to control the number of water tanks.

[0022] The silencing and flame extinguishing agent 9 is injected into the silencing and flame extinguishing housing 1. Specifically, it is a saturated calcium chloride solution that can adapt to working environments from -40℃ to +70℃.

[0023] Meanwhile, the other end of the silencing and flame-extinguishing housing 1 is provided with an injection groove 3 and an exhaust port 4. An injection plug 5 and an exhaust plug 6 are respectively provided on the injection groove 3 and the exhaust port 4 for injecting the silencing and flame-extinguishing agent 9 and venting the air inside the housing during the injection process. Both the injection plug 5 and the exhaust plug 6 are made of silicone rubber, which can effectively seal the housing.

[0024] The assembly process of this technical solution is as follows: The silencing agent 9 is injected into the housing through the injection groove 3. After the silencing agent 9 has submerged the exhaust port 4, the injection plug 5 and the exhaust plug 6 are inserted into the injection groove 3 and the exhaust port 4 respectively. The two plugs are then pressed flush with the end face of the housing and AB glue is applied to the surface for secondary sealing.

[0025] The working principle of this technical solution is as follows: When the power unit is working, the high-temperature and high-pressure gas inside crushes the silencing and flame-extinguishing shell 1. The silencing and flame-extinguishing agent 9 inside is affected by the high temperature and forms a gas-liquid two-phase mixture. It is pushed out of the nozzle by the high-pressure gas and forms a mist cloud at the tail of the nozzle (two-phase combustion noise reduction and flame-extinguishing technology). When the gas passes through the cloud, the gas speed will be greatly reduced due to the shock wave, and the noise generated will also be greatly reduced.

[0026] At the same time, the temperature of the gas will decrease after the high-temperature gas mixes with the two-phase flow, thereby reducing the impact of the nozzle flame and tail flame on the operator.

[0027] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A noise reduction and flame extinguishing device, characterized in that: It includes a silencing and flame-extinguishing shell (1), which is a hollow annular structure. Each part of the silencing and flame-extinguishing shell (1) is filled with a silencing and flame-extinguishing agent (9). The silencing and flame-extinguishing shell (1) will be crushed under the action of high temperature and high pressure gas.

2. The silencing and flame extinguishing device according to claim 1, characterized in that: The silencing and flame-extinguishing housing (1) has an avoidance groove (2) at one end to avoid the ignition device.

3. The silencing and flame extinguishing device according to claim 1, characterized in that: The silencing and flame extinguishing housing (1) is provided with an injection groove (3) and an exhaust port (4) at one end, and an injection plug (5) and an exhaust plug (6) are respectively provided on the injection groove (3) and the exhaust port (4).

4. The silencing and flame extinguishing device according to claim 3, characterized in that: Both the injection plug (5) and the vent plug (6) are made of silicone rubber.

5. The silencing and flame extinguishing device according to claim 1, characterized in that: The silencing and flame extinguishing shell (1) is provided with several annular retaining rings (7) inside, which divide the interior of the silencing and flame extinguishing shell (1) into several water tanks.

6. The silencing and flame extinguishing device according to claim 5, characterized in that: The annular retaining ring (7) is provided with several flow holes (8).

7. The silencing and flame extinguishing device according to claim 1, characterized in that: The silencing and flame-extinguishing agent (9) is a calcium chloride solution.

8. The silencing and flame extinguishing device according to claim 1, characterized in that: The sound-absorbing and flame-extinguishing shell (1) is made of photosensitive resin.

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