Negative pressure buried helicopter platform decontamination nozzle

Abstract

The invention discloses a negative pressure buried helicopter platform decontamination spray head which comprises a spray head lower base and a spray head body, a spray head upper base is arranged in the spray head body, the spray head lower base is connected with the spray head body through the spray head upper base, a plurality of through holes are formed in the spray head upper base, and a water spray cover used for controlling water removal is arranged at the top of the spray head body. A plurality of foam mixed liquid holes are formed in the top of the water spraying cover, and a sprayer opening and closing device is further arranged in the sprayer body. When the device is under certain pressure, water or foam mixed liquid can be flatly sprayed out to achieve a decontamination effect in a flat direction; the upper end face is provided with a vertical section water outlet or foam mixed liquid hole, the included angle between the center line of the hole and the vertical direction is about 5 degrees, and the spraying height is higher under certain pressure.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting, and in particular to a negative pressure underground helicopter platform decontamination nozzle. Background Art

[0002] At present, there are few mainstream nozzles for cleaning the lower part of helicopters on the market. This type of nozzle is mainly used for the protection and cleaning of the lower surface of helicopters and the surface of helicopter decks. Due to the special location of the lower surface fire of helicopters, it is difficult for general nozzles to meet the fire extinguishing requirements. This type of nozzle takes into account the elimination of plane flowing fire while extinguishing the fire on the lower surface of the helicopter at a height. Summary of the invention

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention proposes a negative pressure underground helicopter platform decontamination nozzle.

[0004] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a negative pressure underground helicopter platform decontamination nozzle, comprising a nozzle lower base and a nozzle body, the nozzle body having a nozzle upper base built therein, the nozzle lower base being connected to the nozzle body through the nozzle upper base, the nozzle upper base being provided with a plurality of through holes, a water spray cover for controlling water removal being provided on the top of the nozzle body, a plurality of foam mixture holes being provided on the top of the water spray cover, a nozzle opening and closing device being further provided inside the nozzle body, the center line of the foam mixture hole being at an angle of about 5° with the vertical direction, which makes the spraying height higher under a certain pressure, and almost close to vertical spraying under a certain pressure, which can better extinguish fire on the lower surface of the helicopter or clean or cool its lower surface.

[0005] The nozzle opening and closing device comprises a valve disc assembly connected to a base on the nozzle and a valve seat connected to the valve disc assembly, and a spring is arranged between the valve disc assembly and the valve seat.

[0006] Preferably, the valve disc assembly includes a valve stem, a sealing gasket and a nesting. The sealing gasket is embedded in the nesting, the nesting is connected to the valve stem through threads, the valve seat is movably sleeved on the upper end of the valve stem, a spring is sleeved between the upper part of the valve stem and the valve seat, and the lower end of the valve stem is connected to the base on the nozzle.

[0007] Preferably, six evenly distributed annular air inlet holes are provided in the middle of the nozzle body, and the air inlet holes are located above the base on the nozzle.

[0008] Preferably, eight evenly distributed annular liquid outlet holes are provided on the side of the water spray cover.

[0009] Preferably, the upper end surface of the nozzle cover is provided with a vertical cross-section water or foam mixture outlet hole, and the angle between the center line of the hole and the vertical direction is about 5°.

[0010] Compared with the prior art, the present invention 1. can spray water or foam mixture horizontally under a certain pressure to achieve a horizontal disinfection effect; the upper end surface is provided with a vertical section water or foam mixture outlet hole, and the angle between the center line of the hole and the vertical direction is about 5°, which makes the spray height higher under a certain pressure.

[0011] 2. The water or foam mixture has a certain speed, which will generate negative pressure in the area of ​​the air inlet. At the same time, air will enter the nozzle body from the air inlet to mix the gas and liquid. Then the water or foam mixture enters the nozzle cover and is finally sprayed out from the foam mixture hole or liquid outlet hole of the nozzle cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a stereogram of the present invention.

[0013] Figure 2 is a longitudinal sectional view of the present invention; Figure 3 is a front view of the present invention; Figure 4 It is the overall schematic diagram of the valve disc assembly; Figure 5 This is a schematic diagram of the base on the nozzle.

[0014] Markings in the figure: 1. nozzle lower base; 2. nozzle upper base; 3. nozzle body; 4. valve disc assembly; 41. valve stem; 42. sealing gasket; 43. nesting; 5. spring; 6. valve seat; 7. nozzle cover, 8 foam mixing liquid hole, 9 liquid outlet hole, 10 air inlet hole, 11 through hole. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0016] The invention is described in detail below with reference to the accompanying drawings and embodiments. Example

[0017] like Figure 1As shown, a negative pressure underground helicopter platform decontamination nozzle proposed by the present invention includes a nozzle lower base 1 and a nozzle body 3. The nozzle body 3 has a nozzle upper base 2 built in. The nozzle lower base 1 is connected to the nozzle body 3 through the nozzle upper base 2. The nozzle upper base 2 is provided with a plurality of through holes 11. A water spray cover 7 for controlling water removal is provided on the top of the nozzle body 3. A plurality of foam mixture holes 8 are provided on the top of the water spray cover 7. A nozzle opening and closing device is also provided inside the nozzle body 3. The center line of the foam mixture hole 8 is at an angle of about 5° with the vertical direction. Under a certain pressure, the spray height is higher. Under a certain pressure, it is almost close to vertical spray, which can better extinguish the fire on the lower surface of the helicopter or clean or cool its lower surface.

[0018] Six evenly distributed annular air inlets 10 are provided in the middle of the nozzle body 2, and the air inlet holes 10 are located above the nozzle base 2. The nozzle base 2 sprays water, and the top of the nozzle base 2 is a negative pressure area. The air inlet hole 10 must be located in the negative pressure area. As the pressure increases, the spray height begins to increase. At a certain pressure, water or foam mixture can be sprayed horizontally from the water inlet hole to play a horizontal cleaning role. There are 8 evenly distributed air inlets on the nozzle base 2. The outer surface of the nozzle base 2 is provided with a thread, which is connected to the nozzle lower base 1 through a thread. The number and diameter of the water or foam mixture holes determine the flow rate of the nozzle. The upper outer surface of the nozzle lower base 1 is provided with a pipe thread, which is connected to the internal pipe thread of the lower end of the nozzle body 3. The lower outer surface of the nozzle lower base 1 is provided with a straight thread, which is connected to the external pipeline through an adapter. The nozzle is installed on the deck through a welding seat, and the entire nozzle is fixed through the external thread of the nozzle body 3 using a locking nut.

[0019] The side of the water spray cover is provided with 8 evenly distributed annular outlet holes 9. The side of the nozzle cover 7 is provided with horizontal outlet holes 9 for water or foam mixture, which are evenly arranged in annular shape around the vertical center line at 360°. In order to ensure that the flow rate and the outlet have a certain kinetic energy, the aperture is set in the range of φ2~φ3. When the pressure is certain, the water or foam mixture can be sprayed out horizontally to play a horizontal washing and disinfection role.

[0020] The nozzle opening and closing device comprises a valve disc assembly 4 connected to a base 2 on the nozzle and a valve seat 6 connected to the valve disc assembly 4 , and a spring 5 is arranged between the valve disc assembly 4 and the valve seat 6 .

[0021] The water supply or foam mixture pipeline is connected to the lower base 1 of the nozzle through a threaded joint. The water or foam mixture in the pipeline flows into the lower base 1 of the nozzle and passes through the upper base 2 of the nozzle built in the nozzle body 3, so that the spring 5 begins to compress, and the valve disc assembly 4 is pushed open. The water or foam mixture has a certain speed and will generate negative pressure in the area at the air inlet 10. At the same time, air will enter the nozzle body 3 from the air inlet to mix the gas and liquid. Then the water or foam mixture enters the nozzle cover 7 and is finally sprayed out from the foam mixture hole 8 or the liquid outlet 9 of the nozzle cover 7. When the water or foam mixture flow stops, the spring begins to stretch, and the valve disc assembly and the base 2 on the nozzle are closed.

[0022] The water or foam mixture has a certain velocity, which will generate negative pressure in the area of ​​8 annularly evenly distributed air inlet holes 10, and the external air will enter the nozzle body from the air inlet holes 10 to generate gas-liquid mixing, and the water or foam mixture will be sprayed out from the nozzle cover 7. The diameter of the liquid outlet hole of the nozzle body is larger than the diameter of the air inlet hole on the base 2 of the nozzle, and the ratio is in the range of 1.1~2.

[0023] In this embodiment, the valve disc assembly 4 includes a valve stem 41, a sealing gasket 42 and a nesting 43. The sealing gasket 42 is embedded in the nesting 43, and the nesting 43 is connected to the valve stem 41 through a thread. The valve seat 6 is movably sleeved on the upper end of the valve stem 41, and a spring 5 is sleeved between the upper part of the valve stem 41 and the valve seat 6. The lower end of the valve stem 41 is connected to the base 2 on the nozzle. The upper rod end of the valve disc assembly 4 is inserted into the valve seat 6, and a spring 5 is sleeved between the upper rod end and the valve seat 6. The spring 5 is compressed when working and stretched when stopping working.

[0024] The upper base of the nozzle is provided with 8 evenly distributed water or foam mixture holes. The water supply or foam mixture pipeline is connected to the lower base of the nozzle through a threaded joint. The water or foam mixture in the pipeline flows into the nozzle body flow channel through the liquid inlet hole 9 on the upper base of the nozzle, pushes open the valve disc assembly, and the valve disc assembly is pushed open for a distance. The nozzle is opened, and 8 evenly distributed air inlet holes are also provided on the nozzle body. The rapid flow of liquid generates negative pressure, so that external gas can enter the nozzle body to form a gas-liquid mixed flow, enter the nozzle cover, and spray out through the liquid outlet hole 9 and the foam mixture hole 8360° in an annular manner, effectively cleaning the lower surface of an object at a certain height, and cleaning or extinguishing the water or foam mixture plane.

[0025] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the patent and protection scope of the present invention shall be subject to the attached claims.

Claims

1. A negative pressure underground helicopter platform decontamination nozzle, characterized in that: The invention comprises a nozzle lower base (1) and a nozzle body (3), wherein the nozzle body (3) is provided with a nozzle upper base (2) therein, the nozzle lower base (1) is connected to the nozzle body (3) via the nozzle upper base (2), the nozzle upper base (2) is provided with a plurality of through holes (11), a water spray cover (7) for controlling water removal is arranged on the top of the nozzle body (3), a plurality of foam mixed liquid holes (8) are arranged on the top of the water spray cover (7), and a nozzle opening and closing device is also arranged inside the nozzle body (3).

2. The nozzle opening and closing device comprises a valve disc assembly (4) connected to the nozzle base (2) and a valve disc assembly (5) connected to the valve disc A valve seat (6) connected to the valve disc assembly (4), and a spring (5) is provided between the valve disc assembly (4) and the valve seat (6).

3. A negative pressure underground helicopter platform decontamination nozzle as claimed in claim 1, characterized in that: The valve disc assembly (4) comprises a valve stem (41), a sealing gasket (42) and a nest (43). The sealing gasket (42) is embedded in the nest (43), the nest (43) and the valve stem (41) are connected via threads, the valve seat (6) is movably sleeved on the upper end of the valve stem (41), a spring (5) is sleeved between the upper part of the valve stem (41) and the valve seat (6), and the lower end of the valve stem (41) is connected to the base (2) on the nozzle.

4. A negative pressure underground helicopter platform decontamination nozzle as claimed in claim 2, characterized in that: Six annular evenly distributed air inlet holes (10) are provided in the middle of the nozzle body (2), and the air inlet holes (10) are located above the nozzle upper base (2).

5. A negative pressure underground helicopter platform decontamination nozzle as claimed in claim 2, characterized in that: The side surface of the water spray cover is provided with 8 annular evenly distributed liquid outlet holes (9).

6. A negative pressure underground helicopter platform decontamination nozzle as claimed in claim 1, characterized in that: The upper end surface of the nozzle cover (7) is provided with a vertical cross-section water or foam mixed liquid outlet hole (8), and the angle between the center line of the hole and the vertical direction is about 5°.

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