CN106881212B - Multifunctional spray jet nozzle - Google Patents
Multifunctional spray jet nozzle Download PDFInfo
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- CN106881212B CN106881212B CN201710226571.0A CN201710226571A CN106881212B CN 106881212 B CN106881212 B CN 106881212B CN 201710226571 A CN201710226571 A CN 201710226571A CN 106881212 B CN106881212 B CN 106881212B
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- pressure control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
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- Bathtubs, Showers, And Their Attachments (AREA)
Abstract
The technology discloses a spray jet flow multifunctional spray head which is used for the periphery of a roof and the vertical surface of an outer wall of a multi-story building, and meets the requirements of spray haze reduction and dust removal, the cleaning of the vertical surface of the outer wall or fire fighting respectively under two-stage low-pressure and high-pressure water supply. The pressure control device comprises a nozzle outer wall provided with a valve cavity, a pressure control assembly consisting of a pressure control piston, a pressure control spring and a pressure control sleeve, and a flow guide assembly consisting of a flow guide piston, a flow guide spring and a flow guide sleeve. The pressure control piston is internally provided with a pressure control spraying flow passage and a pressure control jet flow passage, and the flow guide piston is internally provided with a flow guide spraying flow passage; the spray opening is communicated with the flow guide spray runner; the bypass port and the diversion spray runner; a flow guide jet flow channel is arranged on the side wall of the valve cavity; when the pressure of water entering the valve cavity is lower, the water enters the flow guide spraying flow passage only through the pressure control spraying flow passage and is sprayed out through the spraying opening; when the water pressure entering the valve cavity is larger, the water simultaneously enters the diversion spray flow passage through the pressure control spray flow passage and the pressure control jet flow passage and flows out through the bypass port and the diversion jet flow passage.
Description
Technical Field
The technology relates to the technical field of spraying instruments, in particular to a spraying jet flow multifunctional nozzle.
Background
Due to the rapid development of cities, haze has become a pollution disaster which must be considered in many cities. The existing spray head in the current market is mostly used for spraying jet flow although the spray intensity is very high, the diameter of the sprayed water mist is large, and PM is mainly used for haze2.5The inhibition effect is not obvious, and in the using process, huge water consumption is needed, so that the waste of water resources is caused.
Meanwhile, once a fire occurs in a high-rise building, the fire cannot be timely restrained due to the height of the high-rise building, and therefore great loss is caused to the life and property safety of people.
Based on the reasons, the technology integrates the related technologies in urban fire control and spray head design, develops the multifunctional spray jet spray head integrating spray mist spraying and showering, and effectively meets the requirements of mist spraying, haze reducing, dust removing, outer vertical surface cleaning and fire control.
Disclosure of Invention
The technical purpose of the invention is to provide a multifunctional spray jet nozzle for solving the defects in the prior art.
In order to achieve the purpose, the technology adopts the following technical scheme:
the multifunctional spray jet nozzle comprises a nozzle outer wall 1 with a valve cavity formed inside, and a pressure control assembly and a flow guide assembly are sequentially arranged in the valve cavity from an inlet to an outlet along the valve cavity, and is characterized in that the pressure control assembly comprises a pressure control piston 8, a pressure control spring 7 and a pressure control sleeve 6, and the flow guide assembly comprises a flow guide piston 2, a flow guide spring 5, a flow guide sleeve 4 and a nozzle firing pin 3;
the pressure control sleeve 6 and the flow guide sleeve 4 are arranged in the valve cavity; the pressure control piston 8 and the flow guide piston 2 can move axially relative to the pressure control sleeve 6 and the flow guide sleeve 4 respectively; springs are arranged between the pressure control piston 8 and the pressure control sleeve 6 and between the flow guide piston 2 and the flow guide sleeve 4, and the springs are used for enabling the pressure control piston 8 and the flow guide piston 2 to be far away from the pressure control sleeve 6 and the flow guide sleeve 4 and to be close to the position of a valve cavity inlet 24 in a normal state;
the pressure control piston 8 is internally provided with a pressure control spraying flow passage 11 and a pressure control jet flow passage 19, and the flow guide piston 2 is internally provided with a flow guide spraying flow passage 13; the end part of the flow guide piston 2 extending out of the valve cavity outlet is provided with a spray opening 22 communicated with the flow guide spray flow passage 13, and the spray head firing pin 3 is axially opposite to the spray opening 22 at the outer side of the spray head outer wall 1;
a bypass port 18 communicated with the diversion spray runner 13 is arranged in the radial direction of the diversion piston 2; a flow guide jet flow channel 14 is arranged on the side wall of the valve cavity;
when the water pressure entering the valve cavity is small, the pressure control piston 8 and the flow guide piston 2 are positioned far away from the pressure control sleeve 6 and the flow guide sleeve 4 and close to the inlet 24 of the valve cavity, the pressure control jet flow channel 19 is not communicated with the flow guide spray flow channel 13, and the bypass port 18 is staggered with the flow guide jet flow channel 14; water enters the diversion spraying flow passage 13 only through the pressure control spraying flow passage 11 and is sprayed out through the spraying opening 22;
when the water pressure entering the valve cavity is large, the pressure control piston 8 and the flow guide piston 2 are pushed to move axially, the pressure control piston 8 and the flow guide piston 2 are positioned at the positions close to the pressure control sleeve 6 and the flow guide sleeve 4 and far away from the valve cavity inlet 24, the pressure control jet flow channel 19 is communicated with the flow guide spray flow channel 13, and the bypass port 18 is opposite to the flow guide jet flow channel 14 in the radial direction; the water enters the diversion spray flow passage 13 through the pressure control spray flow passage 11 and the pressure control jet flow passage 19 at the same time and flows out through the bypass port 18 and the diversion jet flow passage 14.
Compared with the prior art, the beneficial effect of this technique is: the pressure control spray flow passage 11 is communicated with the flow guide spray flow passage 13 no matter the pressure control piston 8 moves to any position relative to the pressure control sleeve 6. Therefore, when water enters the valve cavity from the valve cavity inlet 24, the water flows into the pilot spray flow channel 13 through the pressure control spray flow channel 11 regardless of the pressure of the water.
When the pressure of water is lower, the pressure control piston 8 is positioned at a position far away from the pressure control sleeve 6 and close to the valve cavity inlet 24, and the pressure control jet flow channel 19 is not communicated with the flow guide spray flow channel 13; meanwhile, the flow guide piston 2 is positioned far away from the flow guide sleeve 4 and close to the valve cavity inlet 24, the bypass port 18 is staggered with the flow guide jet flow channel 14, and the flow guide spray flow channel 13 is not communicated with the flow guide jet flow channel 14; therefore, water does not enter the guide spray flow passage 13 through the pressure control jet flow passage 19, only enters the guide spray flow passage 13 through the pressure control spray flow passage 11, the water entering the guide spray flow passage 13 does not flow out through the guide jet flow passage 14, and is only sprayed out through the spray opening 22, and the spray head firing pin 3 forms a mist shape.
When the pressure of water is higher, the water pushes the pressure control piston 8 and the flow guide piston 2 to move towards the outlet direction of the valve cavity along the axial direction, the pressure control piston 8 is positioned at a position close to the pressure control sleeve 6 and far away from the inlet 24 of the valve cavity, and the pressure control jet flow channel 19 is also communicated with the flow guide spray flow channel 13; meanwhile, the flow guide piston 2 is positioned close to the flow guide sleeve 4 and far away from the valve cavity inlet 24, the bypass port 18 is opposite to the flow guide jet flow channel 14 in the radial direction, and the flow guide spray flow channel 13 is communicated with the flow guide jet flow channel 14 through the bypass port 18; therefore, water simultaneously enters the diversion spray runner 13 through the pressure control spray runner 11 and the pressure control jet runner 19, and most of the water entering the diversion spray runner 13 flows out through the bypass port 18 and the diversion jet runner 14; because of the small cross-sectional area of the spray opening 22, the resistance is high, and only a small portion of the water is sprayed through the spray opening 22.
As a further improvement of the spray jet multifunctional nozzle, the inner wall of the pressure control sleeve 6 is provided with a sealing ring platform 26, and the periphery of the pressure control piston 8 is contacted with the sealing ring platform 26; the outlet of the pressure control spray flow passage 11 is positioned on the end surface of the extrusion piston far away from the inlet 24 of the valve cavity; the outlet of the pressure-control jet flow channel 19 is positioned on the periphery of the pressure-control piston 8;
when the water pressure entering the valve cavity is small, the pressure control piston 8 is positioned at a position far away from the pressure control sleeve 6 and close to the inlet 24 of the valve cavity, the outlet of the pressure control jet flow channel 19 is positioned between the inlet 24 of the valve cavity and the sealing ring platform, and the pressure control jet flow channel 19 is not communicated with the diversion spray flow channel 13;
when the water pressure entering the valve cavity is larger, the pressure control piston 8 and the flow guide piston 2 are pushed to move axially, the pressure control piston 8 and the flow guide piston 2 are positioned at the positions close to the pressure control sleeve 6 and the flow guide sleeve 4 and far away from the inlet 24 of the valve cavity, the outlet of the pressure control jet flow channel 19 is communicated with a transition cavity 28 positioned at one side of the sealing ring platform 26 close to the outlet of the valve cavity, and the pressure control jet flow channel 19 is communicated with the flow guide spray flow channel 13 through the transition cavity 28.
As a further improvement of the spray jet flow multifunctional spray head, the spray head multifunctional spray head also comprises a spray head rear cover 9 which is detachably connected on the outer wall of the spray head, and the spray head rear cover 9 is positioned at an inlet 24 of the valve cavity and is provided with a passage communicated with the valve cavity; the rear cover 9 of the spray head plays a role in limiting the movement of the pressure control piston 8 towards the direction of the valve cavity inlet 24 under the action of the spring.
As a further improvement of the multifunctional spray jet nozzle, the inner side of the nozzle outer wall 1 opposite to the periphery of the pressure control sleeve 6 is provided with a groove for arranging a U-shaped sealing ring.
As a further improvement of the multifunctional spray jet nozzle, the periphery of the diversion piston 2, which is in contact with the inner hole of the outer wall 1 of the nozzle, is provided with a groove for arranging a U-shaped sealing ring.
As a further improvement of the multifunctional spray jet nozzle, the inner hole of the nozzle outer wall 1 contacted with the flow guide sleeve 4 is provided with a groove for arranging a U-shaped sealing ring.
As a further improvement of the multifunctional spray-jet nozzle, the diversion jet flow channel 14 is of an arc-shaped groove-shaped structure.
Drawings
FIG. 1 is an exploded view of a spray jet multifunction nozzle in accordance with the present technique;
FIG. 2 is a schematic structural diagram of a multifunctional spray head of a spray jet;
FIG. 3 is a schematic structural view of the multifunctional spray jet nozzle (omitting a flow guide spring, a pressure control spring, etc.);
FIG. 4 is a schematic view of a pressure control piston;
fig. 5 is a schematic view of a deflector piston.
In the figure: 1 spray head outer wall, 2 guide piston, 3 spray head striker, 4 guide sleeve, 5 guide spring, 6 control pressure sleeve, 7 control pressure spring, 8 control pressure piston, 9 spray head back cover, 10 connecting piece, 11 control pressure spray flow channel, 13 guide spray flow channel, 14 guide jet flow channel, 15 control pressure spray flow channel inlet, 16 control pressure jet flow channel inlet, 18 by-pass port, 19 control pressure jet flow channel, 22 spray port, 23 valve cavity, 24 valve cavity inlet, 25 valve cavity outlet, 26 sealing ring platform, 27 control pressure spray flow channel outlet, 28 transition cavity, 29 control pressure jet flow channel outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, the multifunctional spray jet nozzle comprises a nozzle outer wall 1, a nozzle rear cover 9, a pressure control assembly and a flow guide assembly, wherein the pressure control assembly comprises a pressure control piston 8, a pressure control spring 7 and a pressure control sleeve 6, and the flow guide assembly comprises a flow guide piston 2, a flow guide spring 5, a flow guide sleeve 4 and a nozzle firing pin 3. The rear cover 9 of the spray head is positioned on the outer wall 1 of the spray head through the outer ring bulge and the internal thread of the rear cover, and a water inlet is formed in the middle of the rear cover and is connected with the connecting piece 10 through the external thread. The front end of the outer wall 1 of the spray head is conical, the middle of the outer wall is provided with a hole, a plurality of sections of grooves are arranged in the outer wall for positioning internal elements, and one end of the outer wall 1 of the spray head is fixedly connected with a rear cover 9 of the spray head in a threaded manner. A plurality of grooves are formed in the inner side of the outer wall 1 of the spray head and used for arranging U-shaped sealing rings, and a flow guide jet flow channel 14 communicated with the inside is formed below the front end of the outer wall 1 of the spray head.
Referring to fig. 4, a through hole is formed in the middle of the pressure control piston 8 to form a pressure control spray flow passage 11, and 8 small holes are formed around the pressure control spray flow passage 11 to form a pressure control jet flow passage 19. The outlet 29 of the pressure control jet channel 19 is in the circumferential direction of the pressure control piston. The outlet 27 of the pressure control spray channel 11 is on the front face of the pressure control piston. The inlet 15 of the pressure-control spray channel 11 and the inlet 16 of the pressure-control jet channel 19 are both on the rear end face of the pressure-control piston. The pressure control spring 7 is arranged between the pressure control piston 8 and the pressure control sleeve 6, and enables the pressure control piston 8 to be in contact with the rear cover 9 of the spray head in an initial state.
In the technology, one end of the pressure control sleeve 6 is contacted with the pressure control spring 7 and is fixed on a bulge inside the outer wall 1 of the spray head under the pressure of the pressure control sleeve, and the inner side of the outer wall 1 of the spray head opposite to the periphery of the pressure control sleeve 6 is provided with a groove for arranging a U-shaped sealing ring. The middle of the diversion piston 2 is provided with a through hole for forming a diversion spray runner 13, and the diversion spring 5 is arranged between one side of the diversion piston 2 and the diversion sleeve 4. The periphery of the diversion piston 2 contacting with the inner hole of the nozzle outer wall 1 is provided with a groove for arranging a U-shaped sealing ring. One end of the flow guide sleeve 4 is in contact with the flow guide spring 5 and is fixed on a bulge inside the outer wall 1 of the spray head under the pressure of the flow guide sleeve. The inner hole of the nozzle outer wall 1 contacted with the flow guide sleeve 4 is provided with a groove for arranging a U-shaped sealing ring.
Referring to fig. 5, a fine guide spray channel 13 is formed inside the guide piston 2, when the guide piston 2 contacts the pressure control sleeve 6, water is finally sprayed out from the spray opening 22 to form mist, a nozzle firing pin 3 is arranged outside the front end of the guide piston 2, and the tip of the nozzle firing pin 3 is axially aligned with the spray opening 22. The guide spraying flow channel 13 is provided with a bypass port 18 in the radial direction, when the guide piston 2 moves forwards, the guide spraying flow channel 13 is communicated with the guide jet flow channel 14 on the outer wall 1 of the spray head through the bypass port 18, water is sprayed out from the guide spraying flow channel 13 through the guide jet flow channel 14, and the guide jet flow channel 14 is of an arc-groove-shaped structure.
When the technology is used, the pressure control assembly is positioned at the water inlet to adjust the water pressure and the water quantity, when the water pressure is lower, the compression quantity of the pressure control spring is small, the relative movement distance between the pressure control piston and the pressure control sleeve is small, the pressure control jet flow channel is not communicated, and water enters the transition cavity 28 from the pressure control spray flow channel; the water pressure rises, the compression amount of the pressure control spring is increased, the relative movement distance between the pressure control piston and the pressure control sleeve is increased, the pressure control jet flow channel is opened, water enters the transition cavity from the pressure control spray flow channel and the pressure control jet flow channel, and the water passing area is increased. One end of a diversion spring is connected to a diversion piston, the other end of the diversion spring is connected with a diversion sleeve, a diversion assembly controls a diversion jet flow passage to be opened and closed, when the water pressure is low, the compression amount of the diversion spring is small, the relative movement distance between the diversion piston and the diversion sleeve is small, the diversion jet flow passage is not communicated, water enters a spray nozzle from a diversion spray passage and impacts on a spray needle to form fog drops; the water pressure rises, the compression amount of the diversion spring is increased, the relative movement distance between the diversion piston and the diversion sleeve is increased, the diversion jet flow channel is communicated, and water is jetted by the diversion jet flow channel. The multifunctional spray jet spray nozzle can be applied to the periphery of the roof and the vertical surface of the outer wall of a multi-high-rise building, and meets the requirements of spray haze reduction and dust removal, cleaning of the vertical surface of the outer wall or fire fighting respectively under low-pressure and high-pressure water supply.
The above description is only for the preferred embodiments of the present technology, but the scope of the present technology is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present technology, and equivalent alternatives or modifications according to the technical solutions and the technical concepts of the present technology are within the scope of the present technology.
Claims (7)
1. The multifunctional spray jet nozzle comprises a nozzle outer wall (1) with a valve cavity (23) formed inside, and a pressure control assembly and a flow guide assembly are sequentially arranged in the valve cavity from an inlet (24) to an outlet (25) along the valve cavity, and is characterized in that the pressure control assembly comprises a pressure control piston (8), a pressure control spring (7) and a pressure control sleeve (6), and the flow guide assembly comprises a flow guide piston (2), a flow guide spring (5), a flow guide sleeve (4) and a nozzle firing pin (3);
the pressure control sleeve (6) and the flow guide sleeve (4) are fixed in the valve cavity; the pressure control piston (8) and the flow guide piston (2) can move axially relative to the pressure control sleeve (6) and the flow guide sleeve (4) respectively; springs are arranged between the pressure control piston (8) and the pressure control sleeve (6) and between the flow guide piston (2) and the flow guide sleeve (4), and the pressure control piston (8) and the flow guide piston (2) are far away from the pressure control sleeve (6) and the flow guide sleeve (4) and are close to the position of the valve cavity inlet (24) in a normal state;
a pressure control spraying flow passage (11) and a pressure control jet flow passage (19) are arranged in the pressure control piston (8), and a flow guide spraying flow passage (13) is arranged in the flow guide piston (2); the end part of the flow guide piston (2) extending out of the valve cavity outlet is provided with a spray opening (22) communicated with the flow guide spray flow passage (13), and the spray head firing pin (3) is axially opposite to the spray opening (22) at the outer side of the spray head outer wall (1);
a bypass opening (18) communicated with the diversion spray runner (13) is arranged in the radial direction of the diversion piston (2); a diversion jet flow channel (14) is arranged on the side wall of the valve cavity;
when the water pressure entering the valve cavity is small, the pressure control piston (8) and the flow guide piston (2) are positioned far away from the pressure control sleeve (6) and the flow guide sleeve (4) and close to the position of the valve cavity inlet (24), the pressure control jet flow channel (19) is not communicated with the flow guide spray flow channel (13), and the bypass port (18) is staggered with the flow guide jet flow channel (14); water enters the diversion spraying flow passage (13) only through the pressure control spraying flow passage (11) and is sprayed out through the spraying opening (22);
when the water pressure entering the valve cavity is large, the pressure control piston (8) and the flow guide piston (2) are pushed to move axially, the pressure control piston (8) and the flow guide piston (2) are positioned at positions close to the pressure control sleeve (6) and the flow guide sleeve (4) and far away from an inlet (24) of the valve cavity, the pressure control jet flow channel (19) is communicated with the flow guide spray flow channel (13), and the bypass port (18) is opposite to the flow guide jet flow channel (14) in the radial direction; water simultaneously enters the diversion spraying flow passage (13) through the pressure control spraying flow passage (11) and the pressure control jet flow passage (19) and flows out through the bypass opening (18) and the diversion jet flow passage (14).
2. The multi-functional spray-jet nozzle of claim 1, characterized in that: the inner wall of the pressure control sleeve (6) is provided with a sealing ring platform (26), and the periphery of the pressure control piston (8) is contacted with the sealing ring platform (26); the outlet (27) of the pressure-control spray flow passage (11) is positioned on the end surface of the extrusion piston far away from the inlet (24) of the valve cavity; an outlet (29) of the pressure-control jet flow channel (19) is positioned on the periphery of the pressure-control piston (8);
when the water pressure entering the valve cavity is small, the pressure control piston (8) is positioned at a position far away from the pressure control sleeve (6) and close to the valve cavity inlet (24), the outlet (29) of the pressure control jet flow channel (19) is positioned between the valve cavity inlet (24) and the sealing ring platform (26), and the pressure control jet flow channel (19) is not communicated with the diversion spray flow channel (13);
when the water pressure entering the valve cavity is large, the pressure control piston (8) and the flow guide piston (2) are pushed to move axially, the pressure control piston (8) and the flow guide piston (2) are positioned at positions close to the pressure control sleeve (6) and the flow guide sleeve (4) and far away from the inlet (24) of the valve cavity, the outlet (29) of the pressure control jet flow channel (19) is communicated with a transition cavity (28) positioned at one side of the sealing ring platform (26) close to the outlet of the valve cavity, and the pressure control jet flow channel (19) is communicated with the flow guide spray flow channel (13) through the transition cavity (28).
3. The multi-functional spray-jet nozzle of claim 1, characterized in that: the sprayer also comprises a sprayer rear cover (9) detachably connected to the outer wall of the sprayer, wherein the sprayer rear cover (9) is positioned at an inlet (24) of the valve cavity and is provided with a passage communicated with the valve cavity; the rear cover (9) of the spray head has a limiting effect on the movement of the pressure control piston (8) towards the inlet (24) of the valve cavity under the action of the spring.
4. The multi-functional spray-jet nozzle of claim 1, characterized in that: the inner side of the nozzle outer wall (1) opposite to the periphery of the pressure control sleeve (6) is provided with a groove for arranging a U-shaped sealing ring.
5. The multi-functional spray-jet nozzle of claim 1, characterized in that: the periphery of the diversion piston (2) contacting with the inner hole of the nozzle outer wall (1) is provided with a groove for arranging a U-shaped sealing ring.
6. The multi-functional spray-jet nozzle of claim 1, characterized in that: the inner hole of the nozzle outer wall (1) which is contacted with the flow guide sleeve (4) is provided with a groove for arranging a U-shaped sealing ring.
7. The multi-functional spray-jet nozzle of claim 1, characterized in that: the diversion jet flow channel (14) is of an arc-groove-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710226571.0A CN106881212B (en) | 2017-04-09 | 2017-04-09 | Multifunctional spray jet nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710226571.0A CN106881212B (en) | 2017-04-09 | 2017-04-09 | Multifunctional spray jet nozzle |
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| CN106881212A CN106881212A (en) | 2017-06-23 |
| CN106881212B true CN106881212B (en) | 2022-05-10 |
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| CN201710226571.0A Active CN106881212B (en) | 2017-04-09 | 2017-04-09 | Multifunctional spray jet nozzle |
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| CN108014935B (en) * | 2017-11-08 | 2019-12-27 | 江苏苏美达五金工具有限公司 | Pressure linear adjustment combined nozzle and high-pressure cleaning equipment |
| CN112772366B (en) * | 2021-01-29 | 2022-08-12 | 无锡大道环境科技有限公司 | Spray irrigation and spray combined nozzle |
| CN114146832B (en) * | 2021-11-23 | 2023-02-17 | 江苏大学 | Pressure self-control type irrigation and pesticide application spray head of micro-irrigation system |
| CN114517458B (en) * | 2022-02-23 | 2022-12-16 | 绿友集团新能源车辆有限公司 | Multi-functional electronic watering lorry |
| CN115582329A (en) * | 2022-10-12 | 2023-01-10 | 重庆赛迪奇智人工智能科技有限公司 | Solar cell is with production single crystal silicon rod acid dip pickle |
| CN116271647B (en) * | 2023-04-23 | 2023-09-19 | 平顶山浩泰化工有限公司 | Quick supply device of chemical industry pipeline fire control foam |
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| FR2240394A1 (en) * | 1973-08-10 | 1975-03-07 | Drori Mordeki | |
| CN2629832Y (en) * | 2003-06-06 | 2004-08-04 | 中国农业大学 | Pressure type step variable spray head device |
| CN201524368U (en) * | 2009-09-28 | 2010-07-14 | 江苏卡威专用汽车制造有限公司 | Superfine water mist fire extinguishing spray gun |
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| CN106881212A (en) | 2017-06-23 |
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