Nozzle with noise reduction function

Abstract

The utility model relates to a nozzle with a noise reduction function. According to the automatic gas fire extinguishing device, high-pressure gas is instantaneously sprayed at a nozzle, so that relatively serious howling and noise can be generated, and the noise can cause interference and damage to precise instruments and electronic equipment in a protection place. The noise reduction nozzle comprises a nozzle seat connected with a main equipment medium source, and is characterized in that a noise reduction inner pore plate, a noise reduction and pressure reduction pore plate and a noise reduction nozzle body are sequentially arranged on the nozzle seat in the direction far away from the medium source, and a first pressure relief cavity is formed between the noise reduction inner pore plate and the noise reduction and pressure reduction pore plate; a second pressure buffering cavity is formed between the noise reduction and pressure reduction hole plate and the noise reduction spray head body, and the area of pressure reduction holes formed in the noise reduction and pressure reduction hole plate is larger than that of pressure reduction holes formed in the noise reduction inner hole plate. The noise reduction inner hole plate and the noise reduction and pressure reduction hole plate are arranged for reducing noise and pressure of media, the flow speed of the media can be correspondingly reduced after the media pass through the pressure reduction holes in the plates, and the effect of reducing noise can be achieved by reducing the flow speed of gasification media.

Description

Technical Field

[0001] The utility model relates to the technical field of special noise reduction for gas fire extinguishing equipment, in particular to a nozzle with a noise reduction function. Background Art

[0002] In the technical schemes that require fire protection for on-site operators and important equipment, various types of automatic gas fire extinguishing devices are widely used to fully submerge or partially protect relevant personnel and equipment according to different characteristics. When the automatic gas fire extinguishing device is released at the specified time and specific place according to the design, the high-pressure gas will instantly spray out at the nozzle, which will produce relatively serious whistling and noise. It will cause panic among the personnel on site and nearby, and the noise will also interfere with and damage the precision instruments and electronic equipment in the protection site. Utility Model Content

[0003] In view of the above problems, the utility model provides a nozzle with noise reduction function, which has a simple and reasonable structure and achieves the effect of noise reduction spraying.

[0004] To this end, the utility model adopts the following technical scheme: a nozzle with noise reduction function, including a nozzle seat connected to the medium source of the main equipment, characterized in that a noise reduction inner orifice plate, a noise reduction pressure reducing orifice plate and a noise reduction nozzle body are sequentially arranged on the nozzle seat in the direction away from the medium source, a first pressure relief cavity is formed between the noise reduction inner orifice plate and the noise reduction pressure reducing orifice plate, a second pressure relief cavity is formed between the noise reduction pressure reducing orifice plate and the noise reduction nozzle body, and the area of ​​the pressure relief hole opened on the noise reduction pressure reducing orifice plate is larger than the area of ​​the pressure relief hole on the noise reduction inner orifice plate.

[0005] Preferably, the nozzle body is made of powder sintered body.

[0006] Preferably, the nozzle body fixes the noise reduction and pressure reducing orifice plate in the step of the nozzle seat.

[0007] Preferably, an elastic retaining ring for the hole is arranged outside the noise reduction inner hole plate.

[0008] Preferably, a nozzle gland is provided on the nozzle body, an opening is formed on the upper portion of the nozzle gland, and the nozzle gland fixes the nozzle body to the nozzle seat by a plurality of screws.

[0009] Preferably, an elastic gasket is arranged between the gland and the nozzle body.

[0010] Preferably, the shape of the lower end of the nozzle holder where it is connected to the main equipment is a hexagonal shape.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1. The noise reduction inner orifice plate and the noise reduction pressure reducing orifice plate are set to reduce the noise and pressure of the medium. After the medium passes through the pressure reducing holes on the plate, the flow velocity will be slowed down accordingly. The slowing down of the flow velocity of the gasified medium can reduce the noise.

[0013] 2. Multiple buffer spaces are set up in a gradient. After the medium passes through the noise reduction inner orifice plate, it will expand in the buffer space. During the expansion process, the pressure of the medium inside the nozzle assembly will be reduced.

[0014] 3. The nozzle body is made of powder sintered body. Because many tiny pores are formed in the structure of powder sintered body during the sintering process, the special medium provided by the fire-fighting facilities is discharged from these fine pores, which will greatly reduce the noise generated after contacting the air, objectively meeting the design requirements of noise reduction spraying.

[0015] 4. The upper opening of the pressure cap also serves as the release position of the nozzle, increasing the area of ​​the nozzle released to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional view of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0018] In the figure: 1, nozzle gland 2, elastic gasket 3, screw 4, noise reduction nozzle body 5, noise reduction pressure reducing orifice plate 6, noise reduction inner orifice plate 7, elastic retaining ring for hole 8, nozzle seat 9, first pressure relief chamber 10, second pressure relief chamber. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific embodiments.

[0020] like Figure 1 A nozzle with noise reduction function is shown, comprising a nozzle seat 8 connected to a medium source of a main device, characterized in that a noise reduction inner orifice plate 6, a noise reduction pressure reducing orifice plate 5 and a noise reduction nozzle body 4 are sequentially arranged on the nozzle seat 8 in a direction away from the medium source, a first pressure relief cavity 9 is formed between the noise reduction inner orifice plate 6 and the noise reduction pressure reducing orifice plate 5, a second pressure relief cavity 10 is formed between the noise reduction pressure reducing orifice plate and the noise reduction nozzle body, and the area of ​​the pressure relief hole opened on the noise reduction pressure reducing orifice plate is larger than the area of ​​the pressure relief hole on the noise reduction inner orifice plate.

[0021] The inner hole area of ​​the noise reduction inner orifice plate is determined according to the protection range calculated by the fire protection system. After the medium flow rate according to the design requirements passes through the noise reduction inner orifice plate, it will enter the first pressure relief cavity formed between the noise reduction inner orifice plate and the noise reduction pressure relief orifice plate of part 5. Then the medium will be dispersed into the second pressure relief cavity through the discharge hole of the noise reduction pressure relief orifice plate. After passing through the inner orifice plate, the medium will expand in this space, and the pressure of the medium inside the nozzle assembly will be reduced during the expansion process.

[0022] In one embodiment, the nozzle body 4 is made of powder sintered body. During the sintering process, many tiny pores are formed in the structure of the powder sintered body. The special medium provided by the fire-fighting facilities is discharged from these fine pores, which greatly reduces the noise generated after contacting the air, objectively meeting the design requirements of noise reduction spraying.

[0023] Specifically, the nozzle body 4 fixes the noise reduction and pressure reducing orifice plate 5 in the step of the nozzle seat 8 .

[0024] In order to enhance the sealing performance of the connection between the inner orifice plate and the nozzle seat, an elastic retaining ring 7 for a hole is arranged outside the noise reduction inner orifice plate 6 .

[0025] Specifically, a nozzle gland 1 is provided on the nozzle body, an opening is formed on the upper part of the nozzle gland, and the nozzle body is fixed on the nozzle seat by a plurality of screws 3. The upper opening of the gland also serves as a release position of the nozzle, increasing the area of ​​the nozzle released to the outside.

[0026] In order to enhance the sealing performance of the gland, an elastic gasket 2 is arranged between the gland and the nozzle body.

[0027] Specifically, the shape of the lower end of the nozzle holder where it is connected to the main equipment is a hexagonal shape. The main function is to fix the position of the tool during the installation, maintenance and disassembly of the noise reduction nozzle.

[0028] In order to reduce the vibration and friction during the concentrated release of airflow, the utility model adds multiple step-set flow limiting plates inside the original nozzle structure, and uses the flow limiting plates to change the flow direction of the airflow inside the nozzle. Non-ferrous metal sintered materials are selected at the nozzle position of the nozzle, and the effective area of ​​the nozzle is increased. At the same time, the characteristics of the pores formed during the sintering process of the material are used to interfere with and disperse the airflow when outputting to the outside.

[0029] The noise reduction inner orifice plate is the diameter released within a limited time based on the medium demand calculated by the design engineer according to the location, height and area of ​​the area protected by each fire protection equipment. Different technical requirements will design different diameters to control the flow, so different apertures will be designed.

[0030] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A nozzle with noise reduction function, comprising a nozzle holder (8) connected to a main device medium source, characterized in that A noise reduction inner orifice plate (6), a noise reduction pressure reducing orifice plate (5) and a noise reduction nozzle body (4) are sequentially arranged on the nozzle seat (8) in a direction away from the medium source; a first pressure relief chamber (9) is formed between the noise reduction inner orifice plate (6) and the noise reduction pressure reducing orifice plate (5); a second pressure relief chamber (10) is formed between the noise reduction pressure reducing orifice plate and the noise reduction nozzle body; and the area of ​​the pressure relief hole provided on the noise reduction pressure reducing orifice plate is larger than the area of ​​the pressure relief hole on the noise reduction inner orifice plate.

2. The nozzle with noise reduction function according to claim 1, characterized in that The nozzle body (4) is made of powder sintered body.

3. A nozzle with noise reduction function according to claim 1 or 2, characterized in that The nozzle body (4) fixes the noise reduction and pressure reducing orifice plate (5) in the step of the nozzle seat (8).

4. The nozzle with noise reduction function according to claim 1, characterized in that An elastic retaining ring (7) for holes is arranged outside the noise reduction inner hole plate (6).

5. The nozzle with noise reduction function according to claim 3, characterized in that A nozzle pressure cover (1) is arranged on the nozzle body, an opening is formed on the upper part of the nozzle pressure cover, and the nozzle body is fixed on the nozzle seat by a plurality of screws (3) through the nozzle pressure cover.

6. The nozzle with noise reduction function according to claim 5, characterized in that An elastic gasket (2) is arranged between the pressure cover and the nozzle body.

7. The nozzle with noise reduction function according to claim 1, characterized in that The shape of the lower end of the nozzle seat where it is connected to the main equipment is a hexagonal shape.

Images