CN102350029B - Fire branch with large range - Google Patents
Fire branch with large range Download PDFInfo
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- CN102350029B CN102350029B CN 201110213745 CN201110213745A CN102350029B CN 102350029 B CN102350029 B CN 102350029B CN 201110213745 CN201110213745 CN 201110213745 CN 201110213745 A CN201110213745 A CN 201110213745A CN 102350029 B CN102350029 B CN 102350029B
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Abstract
The invention provides a fire branch with a large range. The fire branch comprises a water inlet segment (1), a cavity (2) and nozzle segment (3) that are connected successively. An inner cavity of the water inlet segment (1) is gradually narrowing form a water inlet end to a water outlet end; the cavity (2) is a curved body; an inner concave conical surface is arranged at a joint position of the curved body and the nozzle segment (3); the water inlet segment (1) and the nozzle segment (3) form a revolving body winding around a same axis; and a center line of the cavity (2) is in a same line with the axis of the water inlet segment (1) and the nozzle segment (3).
Description
Technical field
The invention belongs to fire-fighting lance structure field.
Background technology
Under certain hydraulic pressure and certain outlet diameter, the hydraulic giant range is the most important index of fire-fighting lance.The hydraulic giant range is little, and it is near just to mean that the fire fighter operates the hydraulic giant process middle distance scene of a fire.Therefore in the development multi-functional water, it is particularly important to pay attention to the hydraulic giant range in the hydraulic giant structure.
Fire-fighting lance has two kinds basically both at home and abroad at present: conventional DC hydraulic giant and multi-functional water.The conventional DC hydraulic giant structurally is exactly a taper constricted channel that inner chamber is smooth, sprays after by the taper constricted channel pressure being changed into water flow dynamic energy to the water from fire hose.This hydraulic giant is simple in structure, and is cheap, and range is far away than the multifunctional water rifle, and jet a fluid stream smooth surface does not have water to fall earthward halfway; Multi-functional water mainly by direct current, bloom, function such as adjustable flow, Recoilless constitutes.Multi-functional water is divided into two classes again: with or without the multi-functional water of recoil.This two classes multi-functional water is compared, and the multi-functional water maximum range of no recoil is much smaller, and before jet arrived target, water caused damage earthward because falling greatly; But because it is under high hydraulic pressure, recoil is very little, therefore with common hydraulic giant and not the multi-functional water with recoil compare, obtained application more widely.
The mobile stable continuous jet that belongs to of these two kinds of hydraulic giants can be transformed into energy of the impinging jet continuously with pressure, when hydraulic pressure is constant, stream distance is shorter, especially do not have the recoil hydraulic giant, a part of pressure can be used for overcoming the recoil of hydraulic giant, and stream distance is further shortened.Stream distance is more short, and the fireman is the closer to the scene of a fire.If the increase stream distance just needs to increase hydraulic pressure; Increase hydraulic pressure and then increased water pump and pipeline burden.Therefore how under the constant situation of hydraulic pressure, increase stream distance is the problem that engineers and technicians study always.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, far firing range and recoilless fire-fighting lance.
In order to realize the foregoing invention purpose, the technical scheme of employing is as follows.
A kind of big range fire-fighting lance, formed by the inlet segment, cavity and the nozzle segment that connect successively, the inner chamber of described inlet segment by water inlet end to the water side constriction gradually, described cavity is curved body, and the position that this curved body is connected with nozzle segment is provided with the conical surface of indent, described inlet segment and nozzle segment are the revolving body around the same axis line, the axis conllinear of the center line of described cavity and inlet segment and nozzle segment.
In the technique scheme, the flow section of the curved body of described cavity is oval.
Described inlet segment is made up of water inlet, contraction section, changeover portion, straight length and jet orifice successively, described water inlet is a cylinder of connecting with outside fire protection pipeline, described contraction section is the reducing rotary structure, the bus of its bus one end and water inlet is tangent, the bus of the other end and changeover portion is tangent, described changeover portion also adopts the reducing rotary structure, the bus of its bus and straight length is tangent, make current enter straight length along axial direction, described straight length also adopts cylinder, and this cylindrical end is jet orifice.
Described cavity is made up of inner chamber body, delivery port, conical surface inwall, inner vertical walls, described inner vertical walls and conical surface inwall lay respectively at water inlet end and the water side of inner chamber body, the axis normal of inner vertical walls and hydraulic giant, described delivery port is positioned on the conical surface inwall, the center line of delivery port and conical surface inwall and the dead in line of hydraulic giant.
The long axis length of the elliptic cross-section of described cavity and the water inlet of inlet segment) diameter identical, and minor axis length be the nozzle segment internal diameter 1-1.3 doubly.
Described nozzle segment is an isodiametric pipe, and the delivery port of one end and cavity joins, the internal diameter of nozzle segment be inlet segment inside diameter of straight pipe section 1.2-1.5 doubly, the length of nozzle segment be its diameter 3-5 doubly.
The present invention proposes a kind of long drive flowing water rifle, the measured result of this hydraulic giant shows that under identical hydraulic pressure, range is bigger by 30% than straight stream nozzle, and is bigger by 40% than no recoil multi-functional water; And a fluid stream surface of leaving the hydraulic giant spout is smooth filled circles column, it is strong that anti-air stream is torn ability, export to target from hydraulic giant, the jet form is identical with the conventional DC hydraulic giant, the a fluid stream that leaves the hydraulic giant spout only exists along the axial velocity of jet a fluid stream, there are not Radial Flow component and secondary circulation component (circumferential flow), do not have water to fall earthward at jet midway.
Description of drawings
Fig. 1 is overall construction drawing of the present invention.
Fig. 2 is overall construction drawing of the present invention.
Fig. 3 is structure cutaway view of the present invention.
Fig. 4 is structure cutaway view of the present invention.
The specific embodiment
Fig. 1,2 is big range fire-fighting lance overall construction drawing of the present invention, and the big range fire-fighting lance of the described flat cavate that shakes is made of inlet segment 1, cavity 2 and nozzle segment 3.Described inlet segment 1 and nozzle segment 3 are the revolving body around the same axis line; The flow section of described cavity 2 is oval, its center line and inlet segment 1 and nozzle segment 3 conllinear.
Fig. 3,4 structure cutaway view of the present invention, described inlet segment 1 is made of water inlet 11, contraction section 12, changeover portion 13, straight length 14 and jet orifice 15.Described water inlet 11 is a cylindrical section, and its diameter is identical with the diameter of fire hose.Bus one end of described contraction section 12 and the outlet bus of water inlet 11 are tangent, the import bus of the other end and changeover portion 13 is tangent, be a fairing, shrink curve faster, purpose is that the flow section of contraction section 12 is dwindled in short axial distance fast, makes current strengthen flow velocity fast with the pressure loss of minimum.The bus port of export of described changeover portion 13 and the import bus of straight length 14 are tangent, and shrink comparatively slow, purpose is that the continuity flow section shrinks, and slowly shrink, make and shrink fast the phenomenon that causes turbulence intensity to strengthen in contraction section 12 internal causes and can access at this pipeline section and reduce, and the flow direction that makes current carries out the transition to along axial direction in its exit after by this pipeline section and enters straight length 14.The purpose of described straight length 14 is current further to be rectified to along axial direction enter in the cavity 2 when arriving jet orifice 15.
Described cavity 2 is made of cavity 21, delivery port 22, conical surface inwall 23, inner vertical walls 24.Described cavity 21 is hollow structure; The axis normal of described inner vertical walls 24 and hydraulic giant, the jet orifice 15 of inlet segment is located thereon; Described delivery port 22 is positioned on the conical surface inwall 23, and its center line and hydraulic giant central lines; The center line of described conical surface inwall 23 and hydraulic giant central lines.The flow section of described cavity 2 is oval, and its long axis length is identical with the diameter of the water inlet 11 of inlet segment 1, and minor axis length is 1-1.3 times of nozzle segment 3 diameters.
Described nozzle segment 3 is an isodiametric pipe, and the delivery port 22 in an end and the flat chamber 2 that shakes joins.The internal diameter of described nozzle segment 3 is 1.2-1.5 times of inlet segment 1 straight length 14 internal diameters, and the length of described nozzle segment 3 is 3-5 times of its diameter.The effect that nozzle segment 3 axial lengths are bigger is that the current to the strong turbulent flow that comes out from cavity 2 carry out rectification, reduces the turbulence level of current.
Operation principle of the present invention is, when the High-Pressure Water that brings from fire water is flowed through inlet segment 1, because the runner section reduces fast, water velocity increases fast, enters the cavity 2 with axial direction from jet orifice 15 after the changeover portion 13 of process inlet segment 1 and straight length 14 are eliminated the Radial Flow components.Because runner is in the long axis direction sudden enlargement of cavity 2, enter the part current generation components of flow radially of cavity 2, the conical surface that makes these part current be expanding flows, its cone angle is identical with the cone angle of the conical surface inwall 23 of cavity 2, and these part current are formed on 2 annularly flows of cavity 2 long axis directions along conical surface inwall 23, inner chamber body 21 and inner vertical walls 24.Because these two annularly flow speed are higher, heart place forms 2 low-pressure areas therein, and in low-pressure area, water reduces the steam group that flashes to rotation because of pressure.When the volume of two vapor slugs increases to when contacting, runner is blocked, and the water of upstream inlet segment 1 also continues flowing, and the hydraulic pressure at jet orifice 15 places is increased.When the hydraulic pressure at jet orifice 15 places increased to some pressure, vapor slugs was compressed, and runner begins unimpeded, and current enter nozzle segment 3 with the gross energy that is higher than current stagnation pressure in the fire hose from delivery port 22, and inject the atmosphere from nozzle segment 3.Because the current stagnation pressure is higher than current stagnation pressure in the water band in the nozzle segment, thereby reach the purpose of the range of elevated pressures incoming flow with the lower pressure incoming flow.In the course of the work, because vapor slugs Volume Changes frequency height in the cavity 2 has formed continuous smooth jet at the nozzle place.The measured result of this hydraulic giant shows that under identical hydraulic pressure, range is bigger by 30% than straight stream nozzle, and is bigger by 40% than no recoil multi-functional water.
As another embodiment, cavity 2 also can be designed to the circle chamber that shakes, but vapor slugs is an annular in circle is shaken the chamber.Because the turbulence level height that flows, this vapor slugs can not form complete annular, makes the jet of nozzle segment 3 produce vibration, influences range.
Claims (5)
1. one kind big range fire-fighting lance, it is characterized in that by the inlet segment (1) that connects successively, cavity (2) and nozzle segment (3) are formed, the inner chamber of described inlet segment (1) by water inlet end to the water side constriction gradually, described cavity (2) is curved body, and the position that this curved body is connected with nozzle segment (3) is provided with the conical surface of indent, described inlet segment (1) and nozzle segment (3) are the revolving body around the same axis line, the axis conllinear of the center line of described cavity (2) and inlet segment (1) and nozzle segment (3), the flow section of the curved body of described cavity (2) are oval.
2. big range fire-fighting lance according to claim 1, it is characterized in that described inlet segment (1) is successively by water inlet (11), contraction section (12), changeover portion (13), straight length (14) and jet orifice (15) are formed, described water inlet (11) is a cylinder of connecting with outside fire protection pipeline, described contraction section (12) is the reducing rotary structure, the bus of its bus one end and water inlet (11) is tangent, the bus of the other end and changeover portion (13) is tangent, described changeover portion (13) also adopts the reducing rotary structure, the bus of its bus and straight length (14) is tangent, make current enter straight length (14) along axial direction, described straight length (14) also adopts cylinder, and this cylindrical end is jet orifice (15).
3. big range fire-fighting lance according to claim 2, it is characterized in that described cavity (2) is made up of inner chamber body (21), delivery port (22), conical surface inwall (23), inner vertical walls (24), described inner vertical walls (24) and conical surface inwall (23) lay respectively at water inlet end and the water side of inner chamber body (21), the axis normal of inner vertical walls (24) and hydraulic giant, described delivery port (22) is positioned on the conical surface inwall (23), delivery port (22) and the center line of conical surface inwall (23) and the dead in line of hydraulic giant.
4. big range fire-fighting lance according to claim 3 is characterized in that the long axis length of elliptic cross-section of described cavity (2) is identical with the diameter of the water inlet (11) of inlet segment (1), and minor axis length be nozzle segment (3) internal diameter 1-1.3 doubly.
5. big range fire-fighting lance according to claim 3, it is characterized in that described nozzle segment (3) is an isodiametric pipe, the delivery port (22) of one end and cavity (2) joins, the internal diameter of nozzle segment (3) be inlet segment (1) straight length (14) internal diameter 1.2-1.5 doubly, the length of nozzle segment (3) be the nozzle segment diameter 3-5 doubly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110213745 CN102350029B (en) | 2011-07-28 | 2011-07-28 | Fire branch with large range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110213745 CN102350029B (en) | 2011-07-28 | 2011-07-28 | Fire branch with large range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102350029A CN102350029A (en) | 2012-02-15 |
| CN102350029B true CN102350029B (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110213745 Expired - Fee Related CN102350029B (en) | 2011-07-28 | 2011-07-28 | Fire branch with large range |
Country Status (1)
| Country | Link |
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| CN (1) | CN102350029B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568081A (en) * | 2014-12-19 | 2015-04-29 | 辽宁屹霖科技发展有限公司 | Gooseneck-type spraying nozzle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636545B1 (en) * | 1988-09-16 | 1990-12-07 | Legrouyelec Andre | SPRAY SPRAY OF A MIXTURE OF FLUIDS |
| CN201085869Y (en) * | 2007-06-12 | 2008-07-16 | 天津理工大学 | Direct current energy-saving lingual duct fire hydrant |
| CN101417165A (en) * | 2007-10-26 | 2009-04-29 | 宗翠红 | Fire-fighting water spraying gun |
| CN102107055B (en) * | 2011-02-22 | 2012-08-29 | 广东联塑科技实业有限公司 | Water gun for fire protection |
| CN202044684U (en) * | 2011-04-02 | 2011-11-23 | 湖北汽车工业学院 | Pulsed jet fire-fighting lance |
| CN202185097U (en) * | 2011-07-28 | 2012-04-11 | 广东联塑科技实业有限公司 | Large range fire-fighting lance |
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2011
- 2011-07-28 CN CN 201110213745 patent/CN102350029B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN102350029A (en) | 2012-02-15 |
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