CN112619005B - Spray gun for fire fighting - Google Patents
Spray gun for fire fighting Download PDFInfo
- Publication number
- CN112619005B CN112619005B CN202011545631.3A CN202011545631A CN112619005B CN 112619005 B CN112619005 B CN 112619005B CN 202011545631 A CN202011545631 A CN 202011545631A CN 112619005 B CN112619005 B CN 112619005B
- Authority
- CN
- China
- Prior art keywords
- venturi
- hole
- hollow shell
- stop
- venturi tube
- Prior art date
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- 239000007921 spray Substances 0.000 title claims abstract description 25
- 230000007704 transition Effects 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 34
- 239000004088 foaming agent Substances 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000012530 fluid Substances 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003340 retarding agent Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/002—Apparatus for mixing extinguishants with water
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a spray gun for fire fighting, relating to the technical field of fire-fighting appliances and comprising a first Venturi tube, a second Venturi tube and a stop valve, transition sleeve pipe, injection pipe and metering device, coaxial distribution between first venturi and the second venturi, the stop valve is installed in the entering end of first venturi, the discharge end in first venturi is installed to transition sheathed tube one end, the other end of transition sheathed tube is installed in the entering end of second venturi, the injection pipe is installed in the discharge end of second venturi, first venturi's middle lateral wall leans on to be equipped with the through-hole that can supply retardant or foamer to sneak into one, metering device installs in first venturi's below and is used for adjusting the measurement of the retardant or the foamer of sneaking into, second venturi's middle lateral wall circumference array has a plurality of through-hole two that can supply the air to sneak into. The fire-fighting spray gun has the characteristics of ingenious structure, easiness in adjustment and maintenance and reduced cost.
Description
Technical Field
The invention relates to the technical field of fire-fighting tools, in particular to a spray gun for fire-fighting.
Background
The existing spray gun for fire fighting generally has no foaming function and no function of adjusting the relative percentage of retarder or foaming agent, and must be adjusted on an upstream fire fighting truck, and an operator holding the spray gun must provide an instruction to another operator located upstream to perform the operation of adjusting the necessary percentage of retarder or foaming agent. This makes it rather complicated for the operators to obtain the optimum foaming percentage and to adjust it quickly as the case may be. In addition, the existing fire extinguishing spray gun has the problems of complex structure, difficult maintenance and relatively high cost.
Disclosure of Invention
The invention aims to provide a spray gun for fire fighting, which solves the defects caused by the prior art.
The utility model provides a spray gun for fire control extinguishment, includes first venturi, second venturi, stop valve, transition sleeve pipe, injection pipe and metering device, coaxial distribution between first venturi and the second venturi, stop valve screw thread installation is in the entering end of first venturi, the transition sleeve pipe is located between first venturi and the second venturi, the one end screw thread of transition sleeve pipe is installed in the discharge end of first venturi, the other end screw thread of transition sleeve pipe is installed in the entering end of second venturi, the center of transition sleeve pipe is equipped with conical transition hole and the tip is towards first venturi, injection pipe coaxial arrangement is in the discharge end of second venturi, the middle lateral wall of first venturi leans on to have the through-hole one that can supply retardant or foamer to sneak into, metering device installs in the below of first venturi and is used for adjusting the measurement of the retardant or the foamer of sneaking into, and a plurality of second through holes for mixing air are formed in the circumferential array of the middle side wall of the second Venturi tube.
Preferably, the metering device comprises a hollow shell, a gasket, a metering disc, an adjusting rod and an adjusting disc, the gasket is arranged on the lower side of the first Venturi tube, a third through hole communicated with the first through hole is correspondingly formed in the gasket, the hollow shell is arranged on the lower side of the gasket, the metering disc is positioned on the inner side of the hollow shell, the upper end face of the metering disc is in contact with the lower end face of the gasket, liquid through holes are circumferentially arrayed in the metering disc, when any one liquid through hole moves to the position below the third through hole, the first through hole, the third through hole and the liquid through holes are coaxially distributed, a nozzle is arranged at each liquid through hole, the size of the nozzle is gradually reduced, a plug is replaced by the nozzle with the smallest aperture, the adjusting rod is vertically fixed at the center of the lower end face of the metering disc, penetrates through the hollow shell and is in running fit with the hollow shell and is subjected to sealing treatment, the adjustable metering disc is characterized in that the adjusting disc is coaxially fixed at the lower end part of the adjusting rod, the inner side and the outer side of the hollow shell of the adjusting rod are respectively sleeved with a first compression spring and a limiting sleeve, a liquid inlet hole is formed in the side wall of the hollow shell lower than the metering disc, a liquid inlet pipe is connected to the liquid inlet hole in a threaded mode, and the liquid inlet pipe is connected to an external retardant or foaming agent with pressure.
Preferably, the side wall of the hollow shell, which is equal to or higher than the metering disc, is provided with a mounting hole, the mounting hole is provided with a stop piece, the stop piece comprises a stop ball, a second compression spring and a resisting screw, the second compression spring is inserted into the mounting hole, the stop ball is abutted against the inner end of the second compression spring, hemispherical stop grooves capable of being matched with the stop ball are circumferentially arrayed on the circumferential surface of the metering disc, the stop grooves and the liquid through holes are identical in number and are in one-to-one correspondence, and the resisting screw is arranged on the hollow shell in a threaded manner and is abutted against the outer end of the second compression spring.
Preferably, an operating rod for controlling the on/off state of the stop valve is installed above the stop valve, a supporting plate is fixedly installed below the stop valve, and a mop frame is fixedly installed below the supporting plate.
Preferably, an O-shaped ring is additionally arranged at the contact surface between the stop valve and the first Venturi tube, at the contact surface between the transition sleeve and the first Venturi tube and at the contact surface between the hollow shell and the gasket.
The invention has the advantages that: the spray gun for fire fighting is applied in practice: the stop valve of the spray gun is connected to the water outlet end of the fire water pipe, the stop valve is opened to enable high-pressure water flow to flow into the spray gun, the metering disc is driven to rotate synchronously by the rotating adjusting disc through the transmission of the adjusting rod, when and only when any one liquid through hole provided with the spray nozzle is coaxially distributed with the first through hole and the third through hole, a negative pressure vacuum environment is formed near the fluid outlet of the first venturi tube when the high-pressure water flow flows through the first venturi tube, external pressurized retardant or foaming agent is sucked into the first venturi tube under the action of the internal and external pressure difference, the retardant or foaming agent can be mixed into the water flow according to the set percentage under the actual condition, the negative pressure vacuum environment is formed near the fluid outlet of the second venturi tube when the high-pressure water flow flows through the second venturi tube, and external normal air pressure air is sucked into the second venturi tube under the action of the internal and external pressure difference, the air-blowing type high-pressure water jet device realizes that the outside air can be mixed into the water flow without the action of an external air compressor, and finally, the high-pressure water flow mixed with the air and the retarder or the foaming agent is jetted out from the jet pipe at high speed. In summary, the fire-fighting lance of the present invention has the characteristics of smart structure, easy operation, easy adjustment, easy maintenance, and reduced manufacturing and maintenance costs.
Drawings
Fig. 1 is a schematic structural view of the whole of the present invention.
Fig. 2 is a schematic structural view of the first venturi tube in the present invention.
Fig. 3 is a schematic structural view of a second venturi tube in the present invention.
Fig. 4 is a schematic structural view of the transition casing of the present invention.
Fig. 5 is a schematic structural diagram of the metering device of the present invention.
Fig. 6 is a schematic structural view of the hollow casing of the present invention.
Fig. 7 is a schematic view of a metering disc according to the present invention.
Wherein:
1-a first venturi tube; 11-a first through hole;
2-a second venturi tube; 21-a second through hole;
3-a stop valve; 31-an operating lever; 32-holding plate; 33-a holding frame;
4-a transition casing; 41-transition holes;
5-a jet pipe;
6-a metering device; 61-a hollow shell; 611-liquid inlet hole; 612-mounting holes; 62-a gasket; 621-through hole three; 63-a metering disc; 631-a liquid through hole; 632-a detent groove; 64-a nozzle; 65-a plug; 66-adjusting rod; 661-compression spring one; 662-limit sleeves; 67-adjustment disk; 68-a liquid inlet pipe; 69-a stop; 691-a stop ball; 692-compression spring two; 693-tightening the screw.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 7, a spray gun for fire fighting comprises a first venturi tube 1, a second venturi tube 2, a stop valve 3, a transition sleeve 4, a spray pipe 5 and a metering device 6, wherein the first venturi tube 1 and the second venturi tube 2 are coaxially distributed, the stop valve 3 is threadedly mounted at the inlet end of the first venturi tube 1, the transition sleeve 4 is located between the first venturi tube 1 and the second venturi tube 2, one end of the transition sleeve 4 is threadedly mounted at the outlet end of the first venturi tube 1, the other end of the transition sleeve 4 is threadedly mounted at the inlet end of the second venturi tube 2, the center of the transition sleeve 4 is provided with a conical transition hole 41, the small end of the transition sleeve faces the first venturi tube 1, the spray pipe 5 is coaxially mounted at the outlet end of the second venturi tube 2, the middle side wall of the first venturi tube 1 is provided with a first through hole 11 for mixing a retardant or a foaming agent, the metering device 6 is arranged below the first Venturi tube 1 and is used for adjusting the metering of the mixed retardant or foaming agent, and the circumferential array of the middle side wall of the second Venturi tube 2 is provided with a plurality of second through holes 21 for mixing air. The external pressurized retarder or foaming agent is sucked radially from the first through hole 11 by the action of the negative pressure vacuum existing near the fluid outlet of the first venturi tube 1, and the external air of normal pressure is sucked radially from the second through hole 21 by the action of the negative pressure vacuum existing near the fluid outlet of the second venturi tube 2.
In this embodiment, the metering device 6 includes a hollow housing 61, a spacer 62, a metering disc 63, an adjusting rod 66 and an adjusting disc 67, the spacer 62 is mounted at the lower side of the first venturi tube 1, the spacer 62 is correspondingly provided with a through hole three 621 which is communicated with the through hole one 11, the hollow housing 61 is mounted at the lower side of the spacer 62, the metering disc 63 is positioned at the inner side of the hollow housing 61, the upper end surface of the metering disc is in contact with the lower end surface of the spacer 62, the metering disc 63 is circumferentially arrayed with liquid through holes 631, when any one of the liquid through holes 631 moves to the lower side of the through hole three 621, the through hole one 11, the through hole three 621 and the liquid through holes 631 are coaxially distributed, each of the liquid through holes 631 is provided with a nozzle 64, the size of the nozzle 64 gradually decreases, and the nozzle 64 with the smallest aperture is replaced with a plug 65, the adjusting rod 66 is vertically fixed at the center of the lower end surface of the metering disc 63, the adjusting rod 66 penetrates through the hollow shell 61 and is in rotating fit with the hollow shell 61 and is subjected to sealing treatment, the adjusting disc 67 is coaxially fixed at the lower end part of the adjusting rod 66, the inner side and the outer side of the hollow shell 61 of the adjusting rod 66 are respectively sleeved with a compression spring 661 and a limiting sleeve 662, a liquid inlet hole 611 is formed in the side wall of the hollow shell 61 lower than the metering disc 63, a liquid inlet pipe 68 is in threaded connection with the liquid inlet hole 611, and the liquid inlet pipe 68 is connected with an external pressurized retarder or foaming agent. The metering disc 63 is driven to synchronously rotate by rotating the adjusting disc 67 through the adjusting rod 66, when and only when any one of the liquid through holes 631 provided with the nozzles 64 is coaxially distributed with the first through hole 11 and the third through hole 621, the external pressure-resistant retarding agent or foaming agent is sucked into the first venturi tube 1 under the action of the internal and external pressure difference, and when the liquid through hole 631 provided with the plug 65 is coaxially distributed with the first through hole 11 and the third through hole 621, the external pressure-resistant retarding agent or foaming agent is not sucked into the first venturi tube 1 due to the blockage of the plug 65.
In this embodiment, the hollow housing 61 is provided with a mounting hole 612 on a side wall equal to or higher than the measuring disc 63, and a stop member 69 is provided at the mounting hole 612, the stop member 69 is composed of stop balls 691, two compression springs 692 and tightening screws 693, the two compression springs 692 are inserted into the mounting hole 612, the stop balls 691 are abutted against the inner ends of the two compression springs 692, hemispherical stop grooves 632 capable of being matched with the stop balls 691 are circumferentially arrayed on the circumferential surface of the measuring disc 63, the number of the stop grooves 632 is the same as that of the liquid through holes 631, the tightening screws 693 are threadedly mounted on the hollow housing 61 and abutted against the outer ends of the two compression springs 692. The rotatable metering disc 63 is automatically positioned by the stop 69 so that the selected nozzle 64 or plug 65 is automatically maintained in a coaxially disposed relationship with the first and third bores 11 and 621.
In this embodiment, an operating lever 31 for controlling the on/off state of the stop valve 3 is mounted above the stop valve 3, a receiving plate 32 is fixedly mounted below the stop valve 3, and a mop holder 33 is fixedly mounted below the receiving plate 32. The on/off state of the stop valve 3 can be conveniently controlled through the arranged operating rod 31, and the spray gun for fire fighting can be conveniently lifted through the arranged mop frame 33.
In this embodiment, an O-ring is additionally installed at the contact surface between the stop valve 3 and the first venturi tube 1, the contact surface between the transition sleeve 4 and the first venturi tube 1, and the contact surface between the hollow housing 61 and the gasket 62. The O-shaped ring is additionally arranged at the corresponding detachable connecting part, so that the sealing effect of the corresponding detachable connecting part is improved.
In the present embodiment, the spray gun for fire fighting is in practical use: the stop valve 3 of the spray gun is connected to the water outlet end of the fire water pipe, the stop valve 3 is opened to enable high-pressure water flow to flow into the spray gun, the metering disc 63 is driven to rotate synchronously by the rotating adjusting disc 67 through the adjusting rod 66, when and only when any one of the liquid through holes 631 provided with the nozzle 64 is coaxially distributed with the first through hole 11 and the third through hole 621, because the high-pressure water flow forms a negative pressure vacuum environment near the fluid outlet of the first venturi tube 1 when flowing through the first venturi tube 1, external pressurized retarder or foaming agent is sucked into the first venturi tube 1 under the action of the internal and external pressure difference, the retarder or foaming agent can be mixed into the water flow in a set percentage according to the actual situation, because the high-pressure water flow forms a negative pressure vacuum environment near the fluid outlet of the second venturi tube 2 when flowing through the second venturi tube 2, the external air with normal air pressure is sucked into the second venturi tube 2 under the action of the internal and external pressure difference, it is achieved that the outside air can be mixed into the water flow without the aid of an external air compressor, and finally the high-pressure water flow mixed with air and retarder or foaming agent is ejected at high speed from the ejection pipe 5. In summary, the fire-fighting lance of the present invention has the characteristics of smart structure, easy operation, easy adjustment, easy maintenance, and reduced manufacturing and maintenance costs.
The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (4)
1. A spray gun for fire control extinguishment, which is characterized in that: including first venturi (1), second venturi (2), stop valve (3), transition sleeve pipe (4), injection pipe (5) and metering device (6), coaxial distribution between first venturi (1) and second venturi (2), stop valve (3) threaded mounting is in the entering end of first venturi (1), transition sleeve pipe (4) are located between first venturi (1) and second venturi (2), the one end screw thread of transition sleeve pipe (4) is installed in the discharge end of first venturi (1), the other end screw thread of transition sleeve pipe (4) is installed in the entering end of second venturi (2), the center of transition sleeve pipe (4) is equipped with conical transition hole (41) and the tip is towards first venturi (1), injection pipe (5) coaxial mounting is in the discharge end of second venturi (2), the device is characterized in that a first through hole (11) for mixing a retardant or a foaming agent is formed in the lower portion of the middle side wall of the first Venturi tube (1), the metering device (6) is installed below the first Venturi tube (1) and used for adjusting the metering of the mixed retardant or foaming agent, a plurality of second through holes (21) for mixing air are formed in the circumferential array of the middle side wall of the second Venturi tube (2), the metering device (6) comprises a hollow shell (61), a gasket (62), a metering disc (63), an adjusting rod (66) and an adjusting disc (67), the gasket (62) is installed on the lower side of the first Venturi tube (1), a third through hole (621) communicated with the first through hole (11) is correspondingly formed in the gasket (62), the hollow shell (61) is installed on the lower side of the gasket (62), the metering disc (63) is located on the inner side of the hollow shell (61) and the upper end face of the metering disc is in contact with the lower end face of the gasket (62), the metering disc (63) is circumferentially arrayed with liquid through holes (631), when any one of the liquid through holes (631) moves to the position below the third through hole (621), the first through hole (11), the third through hole (621) and the liquid through holes (631) are coaxially distributed, each liquid through hole (631) is provided with a nozzle (64) and the aperture of the nozzle (64) gradually decreases, a nozzle (64) with the smallest aperture is replaced with a plug (65), the adjusting rod (66) is vertically fixed at the center of the lower end face of the metering disc (63), the adjusting rod (66) penetrates through the hollow shell (61) and is in rotating fit with the hollow shell (61) and is sealed, the adjusting disc (67) is coaxially fixed at the lower end of the adjusting rod (66), the adjusting rod (66) is respectively sleeved with a compression spring I (661) and a limiting sleeve (662) at the inner side and the outer side of the hollow shell (61), the side wall of the hollow shell (61) lower than the metering disc (63) is provided with a liquid inlet hole (611), a liquid inlet pipe (68) is connected to the liquid inlet hole (611) in a threaded mode, and the liquid inlet pipe (68) is connected to an external retarder or foaming agent with pressure.
2. A spray gun for fire fighting according to claim 1, characterized in that: the hollow shell (61) is provided with a mounting hole (612) on the side wall which is equal to or higher than the metering disc (63), a stop piece (69) is arranged at the mounting hole (612), the stop piece (69) consists of a stop ball (691), a second compression spring (692) and a resisting screw (693), the second compression spring (692) is inserted into the mounting hole (612), the stop ball (691) is abutted against the inner end of the second compression spring (692), hemispherical stop grooves (632) which can be matched with the stop ball (691) are arrayed on the circumference of the metering disc (63) in a circumferential array mode, the stop grooves (632) are the same in number and correspond to the liquid through holes (631) one by one, and the resisting screw (693) is installed on the hollow shell (61) in a threaded mode and abutted against the outer end of the second compression spring (692).
3. A spray gun for fire fighting according to claim 1, characterized in that: an operating rod (31) for controlling the on/off state of the stop valve (3) is installed above the stop valve, a supporting plate (32) is fixedly installed below the stop valve (3), and a mop frame (33) is fixedly installed below the supporting plate (32).
4. A spray gun for fire fighting according to claim 1, characterized in that: the stop valve (3) and the contact surface of the first Venturi tube (1), the transition sleeve (4) and the contact surface of the first Venturi tube (1) and the contact surface of the hollow shell (61) and the gasket (62) are respectively provided with an O-shaped ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011545631.3A CN112619005B (en) | 2020-12-24 | 2020-12-24 | Spray gun for fire fighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011545631.3A CN112619005B (en) | 2020-12-24 | 2020-12-24 | Spray gun for fire fighting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112619005A CN112619005A (en) | 2021-04-09 |
| CN112619005B true CN112619005B (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011545631.3A Active CN112619005B (en) | 2020-12-24 | 2020-12-24 | Spray gun for fire fighting |
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| CN (1) | CN112619005B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114776921B (en) * | 2022-05-19 | 2023-07-11 | 南通理工学院 | Porous pre-cooling pipe and manufacturing equipment thereof |
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| CN210566284U (en) * | 2019-09-18 | 2020-05-19 | 浙江工业大学 | Mixer with adjustable foam liquid proportion based on venturi tube |
| CN111617896A (en) * | 2020-05-06 | 2020-09-04 | 河南省交通运输厅公路管理局 | High-efficient multi-functional dust suppression shower nozzle |
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|---|---|---|---|---|
| US2800313A (en) * | 1954-07-16 | 1957-07-23 | Targosh Ted | Liquid mixing nozzle of the aspirator type |
| US5393345A (en) * | 1993-11-30 | 1995-02-28 | Smith; William C. | Respray of overspray of any atomizable liquid with jet venturi induction pump |
| US6000151A (en) * | 1997-03-04 | 1999-12-14 | Hayes; Paul | Vacuum excavation apparatus having an improved air lance, air lance nozzle, and vacuum system including a multistage venturi ejector |
| US6293294B1 (en) * | 1999-06-24 | 2001-09-25 | Hydrosurge, Inc. | Method and apparatus for fluid mixing and dispensing |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112619005A (en) | 2021-04-09 |
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