CN103100170A

CN103100170A - Spray nozzle

Info

Publication number: CN103100170A
Application number: CN2011103577680A
Authority: CN
Inventors: 俞伯良
Original assignee: ZHEJIANG GANGLONG FIREFIGHTING MACHINERY CO Ltd
Current assignee: ZHEJIANG GANGLONG FIREFIGHTING MACHINERY CO Ltd
Priority date: 2011-11-10
Filing date: 2011-11-10
Publication date: 2013-05-15

Abstract

The invention relates to a spray nozzle. The spray nozzle is in a hexagonal prism shape; a tapered filter screen is arranged on a water inlet and compressed by a fastener, an O-shaped sealing ring is sleeved on the upper part of a mandrel, a spring is sleeved on the lower side of the mandrel, and the mandrel is assembled between a spray nozzle body and a nozzle, is pushed to open by pressure of inlet water, closed and sealed under the spring force. Water is decomposed into 300mu m-500mu m mists under work pressure, and the spray nozzle sprays water mists according to a preset atomization angle, has an effective spray distance of 5 meters and belongs to the field of firefighting. Water flowing and dripping hazards and a short effective spraying distance problem of a conventional spray nozzle during an initial spraying period and an ending period are solved. The spray nozzle has the capability preventing harmful gases, insects and dust from entering pipelines and valves; the spray nozzle consists of the mandrel, the spray nozzle body, the spring, the nozzle, the O-shaped sealing ring, a red copper gasket, the tapered filter screen and the fastener; and the spray nozzle has a wide application prospect in electric power, chemical industry, metallurgy, highway tunnels, wine cellars and the like.

Description

Waterfog head

Technical field

The present invention relates to a kind ofly for fire protection sector, just opening atomizing and spurting when inlet pressure reaches predetermined value, the droplet that current is decomposed into 300um-500um spurts by predetermined atomizing angle, when stopping spurting, can close rapidly, stop a water stain infringement of dropping down; Effectively jet length reaches 5m, belongs to fire-fighting fire extinguishing, control fire, fire prevention field.

Background technology

Existing GB GB5135.5-2003 waterfog head does not have the constant pressure turn on atomizing to spurt and the ability that stops closing rapidly sealing; Spurting initially, the hydraulic pressure at conveyance conduit and shower nozzle place is not yet set up, after spurting end, existing waterfog head will continue to drop down water, remaining water in pipe network is drained, cause water damage, such waterfog head can not satisfy the application requirements of power transformer, cable tunnel, cable interlayer, diesel generating set etc.

Waterfog head outlet of today is for open in usual, and dust storm, insect and corrosivity pernicious gas are easily invaded shower nozzle, pipe network, valve, and obstruction, corrosion-damaged lifetime of system affect the atomized spray effect simultaneously.

The atomizing core of current waterfog head mostly is greatly the swash plate shape, and the flow resistance loss is larger, and under low pressure atomizing angle is bigger than normal, and under high pressure atomizing angle is less than normal, atomizes insufficient, inhomogeneous, unstable, and effectively jet length is only 2.5m.

Existing waterfog head does not have the spring pre-tightening hermetically-sealed construction, spray to begin/end and low hydraulic pressure under water outlet drop down water for dripping, continuous direct current water is vowed, easily produces electric leakage, shock hazard.

The unassembled built-in filter screen of waterfog head of the overwhelming majority, the impurity that enters can stop up the atomizing service behaviour that hinders mandrel and nozzle, and impurity is penetrated the infringement protected object in the high-velocity flow undershoot.

Summary of the invention

Spraying in order to solve conventional waterfog head electric leakage, the shock hazard that dripping under the whole story and low hydraulic pressure dropped down water, the continuous water of direct current is vowed and produce; Mandrel and spring, sprayer body, nozzle bore are subject to the problem of insect, dust storm obstruction.The invention provides a kind of waterfog head, establish tapered filter screen, spring pre-tightening mandrel line style hermetically-sealed construction in water inlet passageway; The mode of the three tangential influent stream vortexs in hole uniform in nozzle and the atomizing of mandrel direct current water dephasing mixed flow is adopted in design; The water outlet circular arc is provided with the cutout cutting, reaches droplet and hightails the effect of spurting.When low hydraulic pressure and beginning and the ending phase of sprinkling, this shower nozzle is anhydrous to ooze out; Only have when intake pressure reaches scheduled pressure value, just promote spring and open, blow out through mandrel, nozzle atomization.

The present invention is achieved in that waterfog head is comprised of tight locking button (8), tapered filter screen (6), red copper pad (7), sprayer body (4), O RunddichtringO (2), mandrel (1), spring (3), nozzle (5).Keep closing at ordinary times sealing state under initial tension of spring; When beginning to spray, because pipe network water pressure is not increased to the predetermined work force value, waterfog head is in all the time closes sealing state; When intake pressure reached scheduled pressure value, current promoted spring and open, and transferred the middle part water outlet to through mandrel four inlet openings, the mutual mixed flow effect atomizing of three uniform tangential holes of nozzle is spurted.Spurt when finishing, when the shower nozzle intake pressure during lower than scheduled pressure value, autoshutdown under spring action has avoided the remaining water in the system pipe network to drop down, drip phenomenon from the shower nozzle long period.

The invention has the beneficial effects as follows: eliminated spray to begin/drip, drop down water under end and low hydraulic pressure to vow and the electric leakage/shock hazard of generation with direct current water; Improve the anti-water inlet impurity of shower nozzle and stopped up, hindered the atomized spray ability; Avoided the hidden danger of the infringement protected object under mass-flow impacts of the impurity in the water source; Shower nozzle atomizing, the long-range performance of spurting have been strengthened; Stopped mandrel, sprayer body, nozzle obstruction, be subjected to etching problem.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is section of structure of the present invention.

Fig. 2 is outline drawing of the present invention.

Fig. 3 is the vital part in the present invention: mandrel figure.

Fig. 4 is the vital part in the present invention: nozzle figure.

Sprayer body: inlet opening and abdominal cavity end face are perpendicular, and it joins rounding, and this fillet contacts with O RunddichtringO on mandrel and makes shower nozzle keep sealing; Outlet side is processed with straight thread, is provided with O RunddichtringO right angle groove, is connected sealing with nozzle.

Mandrel: head is coniform, and the circular cone back is provided with O RunddichtringO arc groove; Transfer the middle part water outlet to by circumference four inlet openings, water outlet is the circular cone diversion mode; Four inlet opening Excircle machinings have into water circulation groove.

Nozzle: top is processed with " ten " font intake chamber, is processed with the water inlet circulation groove of intake chamber with the degree of depth; The middle part have three uniform inlet openings and inner chamber tangent, water outlet circular arc and plane intersection are provided with the cutout cutting, have reduced the adhesion effect of water smoke and nozzle cylindrical, reach droplet and hightail and spurt.

Tapered filter screen: built-in structure, adopt red copper pad and tight locking button fastening, circulation area is 3 times of flat screen pack of identical order number, identical bore, and anti-high-pressure high-flow water impact is strong, and flow resistance loses little.Built-in structure makes shower nozzle appearance and size less than external dome formula filter screen, has also avoided the current stopping effect of external dome filter screen to looped pipeline.

The present invention solves the technical scheme that its technical problem takes:

Press core component-mandrel, the nozzle of this shower nozzle of hydrodynamics three dimensional design, adopted spring pre-tightening stem seal structure by design in the sprayer body inner passage, mandrel circular cone back is provided with O RunddichtringO arc groove, transfers the middle part water outlet to by circumference four inlet openings, and its water outlet is pyramid type; Nozzle is established four intake chambers, is processed with the water inlet circulation groove of intake chamber with the degree of depth; The middle part have three uniform inlet openings and inner chamber tangent, the water outlet circular arc is provided with cutting, has reduced water smoke and has dripped adhesion effect with the nozzle cylindrical.Three uniform tangential hole apertures of mandrel water outlet duct and nozzle and jet expansion diameter, circular arc become certain interactive, restriction relation.

The specific embodiment

Waterfog head is comprised of sprayer body (4), nozzle (5), mandrel (1), spring (3), O RunddichtringO (2), tapered filter screen (6), red copper pad (7), tight locking button (8).Tapered filter screen both sides are lined with the red copper pad, are loaded on sprayer body intake tunnel entrance, and are fastening by tight locking button; The O RunddichtringO is enclosed within the stem seal groove; Mandrel is moved to the water inlet by spring thrust, and the O RunddichtringO is contacted with sprayer body abdominal cavity end face, keeps sealing state.Core sleeve has spring to be assemblied in the nozzle inlet hole.Mandrel contacts the O RunddichtringO under the thrust of spring with sprayer body abdominal cavity end face at ordinary times, waterfog head is remained in close sealing state.When beginning to spray, because pipe network water pressure is not increased to the predetermined work force value, shower nozzle is in all the time closes sealing state; When intake pressure reached scheduled pressure value, current promoted spring and open, and transferred middle part water outlet, the mutual mixed flow effect atomizing of three uniform tangential holes of nozzle ejection to through mandrel four inlet openings.Spurt when finishing, when the shower nozzle intake pressure during lower than scheduled pressure value, autoshutdown has avoided the remaining water in the system pipe network to drop down, drip phenomenon from the shower nozzle long period.The three tangential influent stream vortexs in hole and mandrel direct current water uniform in nozzle lose abundant mixed flow atomizing, and the atomization angle that is stable and uniform to jet hole is injected into distance outside 5 meters.

1) rated operating pressure: 0.35MPa;

2) Applicable media: water, AFFF mixed liquor;

3) working pressure range: 0.28-0.8MPa.Minimum operating pressure is lower than similar, and working pressure range is wide, strong adaptability;

4) opening pressure: 0.2MPa; Closing presure: 0.15MPa;

5) mounting means: upright downwards, level, oblique installation, installing space is 2.5m, jet length can reach 5 meters, atomizing evenly, strong adaptability of the present invention;

6) atomization angle: 60 °, 90 °, 120 °;

7) metered flow: 30L/min, 50L/min, 80L/min, 100L/min, 160L/min, 200L/min;

8) be applicable to solid fire, oil fire and electrical fire.

Claims

1. fire demand water fog spray head, profile is hexagon prism; Water inlet is provided with tapered filter screen, and filter screen is compressed by tight locking button, mandrel top cover O RunddichtringO, and downside sleeve spring, mandrel are assemblied between sprayer body, nozzle; Promoted to open by intake pressure, close sealing by spring force; Current are decomposed into the shower nozzle that the 300um-500um droplet sprays by predetermined atomization angle in working pressure range, its effective jet length reaches 5 meters; Waterfog head by: sprayer body (4), mandrel (1), nozzle (5), O RunddichtringO (2), spring (3), tapered filter screen (6), red copper pad (7), tight locking button (8) form.

2. mandrel according to claim 1, is characterized in that head is coniform, and the circular cone back is provided with O RunddichtringO arc groove; Transfer the middle part water outlet to by circumference 4 inlet openings, its water outlet is pyramid type; 4 inlet opening Excircle machinings have into water circulation groove.

3. sprayer body according to claim 1, is characterized in that inlet opening and abdominal cavity end face are perpendicular, and it joins rounding, and outlet side is processed with straight thread, is provided with O RunddichtringO right angle groove.

4. nozzle according to claim 1, is characterized in that top is processed with " ten " font intake chamber, the middle part have three uniform inlet openings and inner chamber tangent, water outlet circular arc and plane intersection are provided with the cutout cutting.