CN102107055A - Water gun for fire protection - Google Patents
Water gun for fire protection Download PDFInfo
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- CN102107055A CN102107055A CN 201110042239 CN201110042239A CN102107055A CN 102107055 A CN102107055 A CN 102107055A CN 201110042239 CN201110042239 CN 201110042239 CN 201110042239 A CN201110042239 A CN 201110042239A CN 102107055 A CN102107055 A CN 102107055A
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Abstract
The invention discloses a water gun for fire protection. The water gun for fire protection comprises a rear gun body, a flow division cone, a rectifier and a front gun body which have a coaxial rotary body structure; the front gun body and the rear gun body are connected together in a sealing way to form a water gun shell; the rectifier and the flow division cone are arranged inside the shell; the opposite faces of the rectifier and the flow division cone are respectively used as a jet flow impact face and a turbulent flow face; the jet flow impact face is conical, and the turbulent flow face is an inward sunken curved face; water enters the rear gun body and a water flow impacts the jet flow impact face so that the water gun generates a forward impact force to offset the recoil generated by the jet flow, and the water is subjected to turbulence of the turbulent flow face on the flow division cone to eliminate a radial flowing component of the water flow and enters the rectifier; and the water is accelerated while a circumferential flowing component is eliminated and jet out of the water gun from a nozzle section. By the water gun for fire protection, the phenomenon that the water flow is seriously wasted during use in the prior art can be avoided, and the jet range is increased by about 15 percent than that of the prior art.
Description
Technical field
The present invention relates to the fire-fighting equipment field, be specifically related to the water-saving recoilless fire demand water rifle of a kind of big range.
Background technology
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, and the water from fire hose is quickened the back ejection by the taper constricted channel.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; But it is big that its weak point is a recoil.When hydraulic pressure is big, need two people to operate.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 recoilless multi-functional water.This two classes multi-functional water is compared, and is much smaller with the maximum range of recoilless multi-functional water, and before jet arrived target, water caused damage earthward because of falling greatly; But because it is under high hydraulic pressure, recoil is very little, therefore with common hydraulic giant with not with the multi-functional water of recoil, has obtained application more widely.
At present domestic and international known Recoilless hydraulic giant structure as shown in Figure 1, it realizes that recoilless major part has mozzle 1, support bar 2, the jet conical surface 3, the reflection conical surface 4, reflection cylinder 5 to constitute.It realizes that recoilless principle is: current (among the figure shown in the arrow) quicken the back impact on the jet conical surface 3 through mozzle 1, make the jet conical surface 3 be subjected to being used for offsetting the recoil of hydraulic giant along the power of the sensing water (flow) direction of hydraulic giant axis direction; Current are through the jet conical surface 3 with after reflecting the conical surface 4 simultaneously, make flow direction by the original direction directive reflection cylinder 5 that axially becomes along the conical surface 3 and 4, promptly along the oblique annular groove directive reflection cylinder 5 that constitutes by face 3 and 4, through reflection cylinder 5 reflection and along the axial relative motion on the face of cylinder 5 synthetic after, oblique directive hydraulic giant front portion (hydraulic giant outside) axis a bit, after crossing at that point, offset the most radial velocity component of current through strong collision, the form that is hollow with less cone angle moves forward then.The weak point of this hydraulic giant has 3: the water column that (1) leaves hydraulic giant is not cylindric, but the taper jet of hollow, and this is to be avoided the phenomenon that occurs at the fire-fighting lance design aspect.Because the taper a fluid stream of hollow is easy to be torn up by air stream, cause range short; (2) because after leaving reflection cylinder 5, a fluid stream has a Radial Flow component and a secondary circulation (circumferential flow), this two parts energy is consumed in vain and a fluid stream velocity component is vertically reduced, thereby has also reduced range; (3) after 3 outflows of the jet conical surface, do not eliminate Radial Flow component and secondary circulation, thereby further reduced range by rectification; (4) owing to the current that penetrate from reflection cylinder a bit cross in hydraulic giant the place ahead, therefore it is rough to cause hydraulic giant to go out a fluid stream, begin constantly to have water to break away from power stream and fall earthward from joint, thereby reduced to arrive the water yield (water yield that reduces is wasted) at target place.The border is measured factually, and the range of Recoilless hydraulic giant is littler by about 30% than conventional DC hydraulic giant, and the water yield that arrives target is little by about 20%.
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 on the hydraulic giant structure.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of far firing range, recoilless water-saving fire demand water rifle.
For achieving the above object, the present invention adopts following technical scheme: a kind of fire demand water rifle, comprise front gun body, rectifier, branch flow cone and rear lance, described front gun body, rectifier, branch flow cone and rear lance are the coaxial rotating body structure, front gun body and the rear lance formation gun shell that is tightly connected wherein, rectifier and branch flow cone are located at enclosure interior from top to bottom successively, the opposite face of rectifier and branch flow cone is respectively jet impulse face and flow-disturbing face, it is conical that described jet impulse face is, and described flow-disturbing face is an inner sunken face; After the water of band pressure enters rear lance, after rear lance quickens, enter front gun body, make hydraulic giant generation impulsive force forward behind the water impact jet impulse face, offset because the recoil that jet produces; After current flow out the jet impulse face, behind the flow-disturbing face flow-disturbing on minute flow cone, eliminate the Radial Flow component of current, enter then in the rectifier, be accelerated when eliminating the circumferential flow component, and penetrate hydraulic giant through the spout section; This structure can effectively be eliminated Radial Flow component, circumferential flow component and eliminate recoil, make jet be smooth closely knit cylinder a fluid stream, not only eliminated in the prior art water stream and wasted serious phenomenon halfway, also made range improve about 15% than prior art.
Described jet impulse face comprises the first jet impulse face and the second jet impulse face that tapering is identical, and the described first jet impulse face is formed by the inwall contraction of the front gun body that is positioned at flow-disturbing face top; The described second jet impulse face is formed by the lower surface of rectifier, and the second jet impulse face is arranged on first jet impulse face inboard and is connected the back with the first jet impulse face and forms conical surface; The conical surface that the first jet impulse face and the second jet impulse face are combined to form causes water impact jet impulse face on the one hand, make current produce an impulsive force forward, offset because the recoil that jet produces, on the other hand, because front gun body inwall radius shrinks, further quicken current, make the water column range farther.
Be provided with cowling panel in described rectifier, cowling panel can be eliminated circumferential current component.
The quantity of described cowling panel is odd number, and the current that can avoid flowing through cowling panel produce covibration.
Described front gun body is made of the spout section, rectifier construction section, current accelerating sections, contraction section, the branch flow cone construction section that connect successively from top to bottom; The lower end radius of rectifier construction section forms the first jet impulse face less than the radius of current accelerating sections; During current process front gun body, make hydraulic giant generation impulsive force forward on the one hand behind the water impact jet impulse face, offset because the recoil of jet generation, rectifier carries out rectification to current, because this section has certain-length, can quicken on the other hand, make the current far firing range of ejaculation current.
Described rectifier is installed in the front gun body rectifier construction section, described rectifier comprises conical shell and the cowling panel that is surrounded by outer ring surface, inner ring surface, lower surface, upper surface, cowling panel is installed on the inner ring surface, the lower surface forms the second jet impulse face, cowling panel is installed on the inner ring surface, rectifier is on the one hand eliminated circumferential flow by cowling panel, further reduces impulsive force before the current direction by the jet impulse face on the one hand.
Flow cone was made of the upper surface that connects successively from top to bottom, the current acceleration face of cylinder, curved surface contraction section in described minute; Described upper surface is the smooth surface of an indent, the upper surface forms the flow-disturbing face, divide the flow-disturbing face of flow cone effectively to eliminate the radially shunting that reflects from the jet impulse face, divide flow cone to cooperate simultaneously with front gun body, form the uiform section annular overcurrent section of certain width and certain axial length, in this overcurrent section, water velocity is enhanced on the one hand, owing to this overcurrent section certain-length is arranged simultaneously, thereby further current are quickened and rectification.
Described rear lance is made of the installation thread segment, rear lance contraction section, the water Belt connector thread segment that connect successively from top to bottom, and described rear lance is threaded with front gun body by thread segment is installed, and the rifle body is easy to assembly.
Described fire-fighting lance also comprises the water Belt connector; Described water Belt connector is threaded with rear lance by water Belt connector thread segment, connects more convenient.
Be provided with preceding sealing ring in the junction of described front gun body and rear lance, effectively prevent seepage.
The invention has the beneficial effects as follows: by in the rifle body of front gun body and rear lance formation, jet impulse face and flow-disturbing face being set, effectively eliminate Radial Flow component, circumferential flow component and eliminate recoil, make jet be smooth closely knit cylinder a fluid stream, not only eliminated in the prior art water stream and wasted serious phenomenon halfway, also made range improve about 15% than prior art.
Description of drawings
Fig. 1 is a prior art fire-fighting lance structural representation;
Fig. 2 is a fire-fighting lance structural representation of the present invention;
Fig. 3 is a front gun body structural representation of the present invention;
Fig. 4 is a rectifier structure schematic diagram of the present invention;
Fig. 5 shunts the wimble structure schematic diagram for the present invention;
Fig. 6 is a rear lance structural representation of the present invention.
Among the figure: the 1-front gun body, 11-spout section, 12-rectifier construction section, end face is installed before the 121-rectifier, 122-rectifier construction section inwall, the 14-accelerating sections, the 15-contraction section, 151,152, the 153-smooth curve, 16-divides the flow cone construction section, 161-encircles end face, 163-front gun body connecting thread, the 2-rectifier, the 21-outer ring surface, the 22-inner ring surface, the 23-lower surface, the 24-cowling panel, the 25-upper surface, 3-divides flow cone, 31-shunts cone, the 32-support ring, the 311-upper surface, the 312-current quicken the face of cylinder, 313-curved surface contraction section, the 322-floor, sealing ring before the 4-, the 5-rear lance, 51-installs screw thread, sealing ring mounting groove before the 52-, 53-rear lance contraction section, 54-water Belt connector screw thread, 6-water Belt connector, sealing ring behind the 7-.
The specific embodiment
With reference to accompanying drawing 2, the preferred structure of fire demand water rifle of the present invention by front gun body 1, rectifier 2, divide flow cone 3, rear lance 5 to constitute, above-mentioned parts is the rotary structure around same axis, is threaded between front gun body 1 and the rear lance 5; With reference to accompanying drawing 3, front gun body 1 is by the spout section 11 that connects successively from top to bottom, rectifier construction section 12, current accelerating sections 14, contraction section 15, divide flow cone construction section 16 to constitute, wherein spout section 11 is a cylinder ring section with certain-length, rectifier construction section 12 is a circular cone ring section that has certain cone angle, the intersection of spout section 11 and rectifier construction section 12 is installed end face 121 before being formed with rectifier, end face 121 be installed be a ring end face with front gun body 1 axis normal before the rectifier, rectifier construction section inwall 122 is a taper seat, matches with the outer ring surface 21 of rectifier 2.
The inner diameter of rectifier construction section 12 is less than the inner diameter of accelerating sections 14, and being formed with the first jet impulse face, 13, the first jet impulse faces 13 at the intersection of rectifier construction section 12 and accelerating sections 14 thus is the conical surfaces with the front gun body 1 axis coaxle heart.After incoming flow impacts this conical surface, in the certain axial flow component of maintenance, produce a Radial Flow component.
The inner chamber of current accelerating sections 14 is the face of cylinder with front gun body 1 coaxial line, quickens the face of cylinder 312 with the current of minute flow cone 3 and cooperates, forms the annular overcurrent section of the uiform section with certain axial length.In this overcurrent section, water velocity is enhanced on the one hand, on the other hand because this overcurrent section has certain-length, thereby when quickening, current are by rectification, after elimination is radially shunted to a certain extent, impact makes hydraulic giant produce a power forward vertically on jet impulse face 13.
The inner chamber of the contraction section 15 diminishing surface of revolution in cross section that many smooth curves 151,152,153 constitute of serving as reasons its objective is current are accelerated gradually; The curve 151 and the curve 153 that is connected the branch flow cone 3 support rings 32 inner chamber surfaces of revolution that connect accelerating sections 14 inner chambers, its radius of curvature should be the radius of curvature of maximum permission, and tangent with these two, its objective is the recirculating zone that reduces near curved wall.
Divide the inner chamber upper end of flow cone construction section 16 to be provided with ring end face 161.Described ring end face 161 cooperates with the front end face that divides flow cone installing ring 32, forward the motion vertically of restriction minute flow cone.Described front gun body connecting thread 163 cooperates with the installation screw thread 51 of rear lance 5, and preceding rear lance is linked together, and the outlet internal diameter of rear lance 5 forms the end face of supported ring 32 less than front gun body 1 arrival end internal diameter.
With reference to accompanying drawing 4, rectifier 2 comprises that outer ring surface 21, inner ring surface 22, lower surface 23, upper surface 25, cowling panel 24 constitute, the conical shell that surrounds of outer ring surface 21, inner ring surface 22, lower surface 23, upper surface 25 wherein, outer ring surface 21 is conical surfaces, with rectifier the measure-alike of the conical surface 122 is installed, mating surface does not have gap or very little gap between the two; The inner ring surface 22 of rectifier 2 is a conical surface, and the outlet internal diameter is less, and the outlet internal diameter is identical with the preceding installation of fore nozzle rectifier end face 121 internal diameters of rectifier construction section 12; The lower surface 23 of rectifier 2 is the conical surface that and the first jet impulse face 13 have identical cone angle, and the two connects the back and forms smooth taper seat, constitutes the jet impulse face jointly.When water impact arrived these two conical surfaces, (establishing impulsive force was by momentum theorem
, speed of incoming flow is
, come current mass to be
The water impact time be
, mass flow is
):
Promptly
By above-mentioned formula, can design conical surface angle and width.
The upper surface 25 of rectifier 2 is the planar annulars with the reorganizer axis normal, and end face 121 is installed before the spout rectifier is cooperated, and prevents that rectifier 2 from moving vertically.The internal diameter of described upper surface 25 is identical with the internal diameter of spout section 1.
With reference to accompanying drawing 5, divide flow cone 3 to constitute by shunting cone 31 and support ring 32, shunting cone 31 is made of upper surface 311, the current acceleration face of cylinder 312, curved surface contraction section 313; It is tangent with curved surface contraction section 313 that current quicken the face of cylinder 312; Current quicken the face of cylinder 312 and have the uiform section annular overcurrent section of certain axial length with current accelerating sections 14 formations of front gun body 1; Upper surface 311 is smooth surfaces of an indent, upper surface 311 forms the flow-disturbing face, its front end tangent line and 3 deads in line of branch flow cone, purpose is the current flow-disturbing with the first jet impulse face 13 of outflow and the second jet impulse face 23, be rectified into along the hydraulic giant axial direction and flow, eliminate the Radial Flow component of current; Upper surface 311 and relative distribution of jet impulse face that constitutes by the first-class shock surface 13 and the second jet impulse face 23; Support ring 32 is fixed on curved surface contraction section 313 by several floors 322, the inner ring surface of support ring 32 is a curved surface, its entrance end is tangent with contraction section 15 inducers 153 of the internal chamber wall of the installation screw thread 51 of rear lance 5 and front gun body 1 respectively, thereby constitutes smooth continuous curve surface.
With reference to accompanying drawing 6, rear lance 5 is made of installation screw thread 51, preceding sealing ring mounting groove 52, rear lance contraction section 53, water Belt connector screw thread 54, screw thread 51 is installed to be cooperated with front gun body connecting thread 163, preceding rear lance is linked together, rear lance contraction section 53 inwalls are the Taper Pipe section of a contraction, current are accelerated gradually, and water band erector screw thread 54 is used for linking together with the internal thread of water Belt connector 6, and utilizes back sealing ring 7 to prevent that seepage from appearring in thread joint face.
Sealing ring 4 before preceding sealing ring mounting groove 52 is used for installing.After the installation screw thread 51 of rear chamber 5 screwed in front gun body connecting threads 163, preceding sealing ring 4 was compacted, and seepage takes place at rear lance connecting thread place before preventing.
In the use, the water of band pressure, enters in the annular overcurrent section of branch flow cone and front gun body formation behind contraction section 53 from rear lance 5, after being accelerated gradually in the curved surface contraction section 313 of minute flow cone, enters the cylinder accelerating sections.In the cylinder accelerating sections, the current that are accelerated impact the first jet impulse face 13 and the second jet impulse face 23 behind over commutation, make hydraulic giant generation impulsive force forward, offset because the recoil that jet produces.After current flow out the jet impulse face, after the flow-disturbing face 311 on minute flow cone streams, eliminate the Radial Flow component of current, enter then in the spout rectifier 2, be accelerated when eliminating circumferentially shunting, and penetrate hydraulic giant through the spout section.This hydraulic giant is owing to be provided with the structure of eliminating Radial Flow component and circumferential flow component, and (these two sections longer in rectifier and spout section, help reducing turbulent flow) the middle turbulent flow that reduces, make jet be smooth closely knit cylinder a fluid stream, not only eliminated in the prior art water stream and wasted serious phenomenon halfway, also made range improve about 15% than prior art.
Claims (10)
1. fire demand water rifle, it is characterized in that: comprise front gun body (1), rectifier (2), divide flow cone (3) and rear lance (5), described front gun body (1), rectifier (2), dividing flow cone (3) and rear lance (5) is the coaxial rotating body structure, front gun body (1) and rear lance (5) the formation gun shell that is tightly connected wherein, rectifier (2) and branch flow cone (3) are located at enclosure interior from top to bottom successively, the opposite face of rectifier (2) and branch flow cone (3) is respectively jet impulse face and flow-disturbing face, it is conical that described jet impulse face is, and described flow-disturbing face is an inner sunken face.
2. fire demand water rifle according to claim 1 is characterized in that: described jet impulse face comprises the first jet impulse face (13) and the second jet impulse face that tapering is identical; The described first jet impulse face (13) is formed by the inwall contraction of the front gun body (1) that is positioned at flow-disturbing face top; The described second jet impulse face is formed by the lower surface (23) of rectifier (2), and the second jet impulse face is arranged on the first jet impulse face (13) inboard and is connected the back with the first jet impulse face (13) and forms conical surface.
3. fire demand water rifle according to claim 1 and 2 is characterized in that: be provided with cowling panel (24) in described rectifier (2).
4. fire demand water rifle according to claim 3 is characterized in that: the quantity of described cowling panel is odd number.
5. fire demand water rifle according to claim 4 is characterized in that: described front gun body (1) is made of the spout section (11) that connects successively from top to bottom, rectifier construction section (12), current accelerating sections (14), contraction section (15), branch flow cone construction section (16); The lower end radius of rectifier construction section (12) forms the first jet impulse face (13) less than the radius of current accelerating sections (14).
6. fire demand water rifle according to claim 5, it is characterized in that: described rectifier (2) is installed in the rectifier construction section (12), rectifier (2) comprises conical shell and the cowling panel (24) that is surrounded by outer ring surface (21), inner ring surface (22), lower surface (23), upper surface (25), cowling panel (24) is installed on the inner ring surface (22), and lower surface (23) form the second jet impulse face.
7. fire demand water rifle according to claim 6 is characterized in that: described minute flow cone (3) by the upper surface (311) that connects successively from top to bottom, current quicken the face of cylinder (312), curved surface contraction section (313) constitutes; Described upper surface (311) is the smooth surface of an indent, and upper surface (311) form the flow-disturbing face.
8. fire demand water rifle according to claim 7, it is characterized in that: described rear lance (5) is made of the installation thread segment (51) that connects successively from top to bottom, rear lance contraction section (53), water Belt connector thread segment (54), and described rear lance (5) is threaded with front gun body by thread segment (51) is installed.
9. fire demand water rifle according to claim 8 is characterized in that: comprise water Belt connector (6); Described water Belt connector (6) is threaded with rear lance by water Belt connector thread segment (54).
10. fire demand water rifle according to claim 9 is characterized in that: the junction at described front gun body (1) and rear lance (5) is provided with preceding sealing ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042239A CN102107055B (en) | 2011-02-22 | 2011-02-22 | Water gun for fire protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042239A CN102107055B (en) | 2011-02-22 | 2011-02-22 | Water gun for fire protection |
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| Publication Number | Publication Date |
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| CN102107055A true CN102107055A (en) | 2011-06-29 |
| CN102107055B CN102107055B (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110042239A Expired - Fee Related CN102107055B (en) | 2011-02-22 | 2011-02-22 | Water gun for fire protection |
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| Country | Link |
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| CN (1) | CN102107055B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350029A (en) * | 2011-07-28 | 2012-02-15 | 广东联塑科技实业有限公司 | Fire branch with large range |
| CN104941095A (en) * | 2015-06-16 | 2015-09-30 | 江苏大学 | Despin device for long-range straight-flow type fire water monitor and processing process |
| CN105080004A (en) * | 2015-09-11 | 2015-11-25 | 中国石油化工股份有限公司 | Foam generation device |
| WO2018196649A1 (en) * | 2017-04-27 | 2018-11-01 | 张颖 | Acceleration gathering long-range water sprinkler |
| CN109603060A (en) * | 2018-12-14 | 2019-04-12 | 九江中船长安消防设备有限公司 | A kind of air foam device-specific spray gun |
| CN113106699A (en) * | 2019-12-24 | 2021-07-13 | 青岛海尔洗衣机有限公司 | Microbubble shower nozzle and have washing equipment of this microbubble shower nozzle |
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| WO2008134284A1 (en) * | 2007-04-27 | 2008-11-06 | Martin Engineering Company | Removable nozzle for use with air cannons and aerators |
| CN101306233A (en) * | 2008-06-14 | 2008-11-19 | 胡济荣 | Rotor axis switching bi-functional spray gun |
| CN101972532A (en) * | 2010-11-01 | 2011-02-16 | 哈尔滨工程大学 | High-pressure direct injection type double-layer fine mist spray head |
| CN202010385U (en) * | 2011-02-22 | 2011-10-19 | 广东联塑科技实业有限公司 | Hydraulic giant for fire protection |
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2011
- 2011-02-22 CN CN201110042239A patent/CN102107055B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008134284A1 (en) * | 2007-04-27 | 2008-11-06 | Martin Engineering Company | Removable nozzle for use with air cannons and aerators |
| CN101306233A (en) * | 2008-06-14 | 2008-11-19 | 胡济荣 | Rotor axis switching bi-functional spray gun |
| CN101972532A (en) * | 2010-11-01 | 2011-02-16 | 哈尔滨工程大学 | High-pressure direct injection type double-layer fine mist spray head |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350029A (en) * | 2011-07-28 | 2012-02-15 | 广东联塑科技实业有限公司 | Fire branch with large range |
| CN104941095A (en) * | 2015-06-16 | 2015-09-30 | 江苏大学 | Despin device for long-range straight-flow type fire water monitor and processing process |
| CN104941095B (en) * | 2015-06-16 | 2017-12-22 | 江苏大学 | A kind of Far Range single flow fire water monitor racemization device and processing technology |
| CN105080004A (en) * | 2015-09-11 | 2015-11-25 | 中国石油化工股份有限公司 | Foam generation device |
| WO2018196649A1 (en) * | 2017-04-27 | 2018-11-01 | 张颖 | Acceleration gathering long-range water sprinkler |
| CN109603060A (en) * | 2018-12-14 | 2019-04-12 | 九江中船长安消防设备有限公司 | A kind of air foam device-specific spray gun |
| CN113106699A (en) * | 2019-12-24 | 2021-07-13 | 青岛海尔洗衣机有限公司 | Microbubble shower nozzle and have washing equipment of this microbubble shower nozzle |
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