WO2023011396A1 - 压缩空气泡沫灭火系统用空气混合器及灭火系统 - Google Patents

压缩空气泡沫灭火系统用空气混合器及灭火系统 Download PDF

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Publication number
WO2023011396A1
WO2023011396A1 PCT/CN2022/109369 CN2022109369W WO2023011396A1 WO 2023011396 A1 WO2023011396 A1 WO 2023011396A1 CN 2022109369 W CN2022109369 W CN 2022109369W WO 2023011396 A1 WO2023011396 A1 WO 2023011396A1
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Prior art keywords
pipe
air
compressed air
foam
fire extinguishing
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PCT/CN2022/109369
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English (en)
French (fr)
Inventor
张佳庆
黄勇
周亦夫
李金忠
张晓东
程登峰
罗沙
过羿
尚峰举
黄玉彪
刘睿
Original Assignee
国网安徽省电力有限公司电力科学研究院
国家电网有限公司
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Application filed by 国网安徽省电力有限公司电力科学研究院, 国家电网有限公司 filed Critical 国网安徽省电力有限公司电力科学研究院
Priority to JP2022567435A priority Critical patent/JP7476353B2/ja
Publication of WO2023011396A1 publication Critical patent/WO2023011396A1/zh

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
    • 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

Definitions

  • the invention relates to the technical field of fire safety, in particular to an air mixer for a compressed air foam fire extinguishing system and a fire extinguishing system.
  • Firefighting is to eliminate hidden dangers and prevent disasters. In the narrow sense, it means to put out fires in the early stages of people's understanding. It mainly includes rescue of personnel at the fire scene, rescue of important facilities and equipment, cultural relics, safety protection and rescue of important properties, and fire extinguishing. wait;
  • Foam liquid is used in fire extinguishing.
  • the current compressed air foam fire extinguishing system generally simply mixes foam and water directly and then sprays it out through compressed air. Such mixing quality is poor and the fire extinguishing effect of foam liquid cannot be fully exerted. , When conveying compressed air, unstable air pressure can easily cause damage to the pipeline.
  • the application number is 201120525546.0, which discloses an integrated automatic compressed air foam fire extinguishing system.
  • water enters the system from the inlet of the pump.
  • the performance is exactly the same as that of ordinary vehicle-mounted pumps; if the Class B foam mixer valve on the fire pump is opened at this time, the requirements for Class B fire extinguishing can be realized; if the foam liquid supply system is opened at this time, the Class A foam liquid and the water pump The pressurized water is mixed to form a foam mixture. If the pneumatic valve of the air supply line is closed at this time, the system will produce a water-foam mixture; the pneumatic valve of the air supply system will open, and the water-foam mixture will be mixed with compressed air.
  • the dryness and wetness of the foam liquid can be controlled and adjusted by controlling the flow rate of compressed air; in addition, the waterway can be closed, and the system Only compressed air flow is provided outward.
  • the air and the foam liquid are mixed while the foam mixture is sprayed out by compressed air.
  • the technical problem to be solved by the present invention is to provide an air mixer for a compressed air foam fire extinguishing system in view of the unstable pressure of the compressed air in the foam fire extinguisher which may easily cause pipeline rupture.
  • An air mixer for a compressed air foam fire extinguishing system comprising a liquid inlet pipe (1), an air inlet pipe (2), a straight pipe (3), a first conical pipe (4), a second conical pipe (5), an energy storage mechanism (6), buffer mechanism (7);
  • the first conical pipe (4) is a three-way pipe; according to the airflow direction, the air intake pipe (2), the first conical pipe (4), the straight pipe (3), the second The two conical pipes (5) are connected in sequence, and the liquid inlet pipe (1), the first conical pipe (4), the straight pipe (3) and the second conical pipe (5) are connected in sequence according to the flow direction of the foam liquid;
  • the small diameter ends of the pipe (4) and the second tapered pipe (5) are respectively connected with the inlet end and the outlet end of the straight pipe (3);
  • the energy storage mechanism (6) comprises a blind pipe (61), a piston (62), an energy storage spring (63), the inlet of the dead pipe (61) is sealed and fixed with the opening on the wall of the intake pipe (2), and the dead pipe (61)
  • the inner cavity communicates with the inner cavity of the intake pipe (2), the piston (62) is limited in the blind pipe (61), and the energy storage spring (63) is limited in the blind of the piston (62) and the blind pipe (61). between the ends;
  • the buffer mechanism (7) includes a positioning ring (71), a guide post (72), a guide sleeve (73), and a damping spring (74); the outer circumference of the positioning ring (71) is provided with a limit groove, and the straight
  • the pipe (3) is limited in the limit groove, the positioning ring (71) is fixed on the guide post (72), and the damping spring (74) is sleeved on the guide post (72); the guide post (72)
  • One end is limited in the guide sleeve (73), and is slidably matched with the guide sleeve (73), and the damping spring (74) is limited between the positioning ring (71) and the guide sleeve (73); the guide sleeve ( 73) The position is fixed.
  • the present invention transports the foam liquid and the compressed air respectively through the liquid inlet pipe and the air inlet pipe.
  • the compressed air and the foam liquid reach the straight pipe through the first conical pipe
  • the foam liquid and the compressed air reach the first conical pipe due to the different cross-sections at both ends of the first conical pipe.
  • the output end of the first tapered pipe narrows the path and is in the process of compression. Under the action of high-pressure airflow, the foam liquid can be fully mixed.
  • the mixed foam liquid reaches the perforated plate of the straight pipe, which can be mixed twice and discharged through the second tapered pipe.
  • the spring limiter can support the straight pipe through the damping spring and can absorb the kinetic energy of the straight pipe. When the foam liquid and compressed air pass through the straight pipe, the straight pipe is not easy to vibrate and has good stability.
  • the piston is supported by an energy storage spring, which can store energy.
  • the piston can be guided and limited through the energy storage tube (blind tube).
  • the energy storage tube blink tube
  • the piston is under pressure and can transmit the pressure to the energy storage spring, which can compress the energy storage spring, so as to absorb the impact of the sudden increase in air pressure, provide buffer for the pipeline, the pipeline is not easy to be damaged, and the air pressure inside the intake pipe returns to normal pressure , the pressure applied to the piston can be stopped, and the energy storage spring can push the piston back.
  • buffer mechanisms (7) which are respectively located on the same side or different sides of the straight pipe (3).
  • a perforated plate 31 is also fixed inside the straight pipe (3).
  • the air mixer also includes a housing (8), and the straight pipe (3), the first tapered pipe (4), the second tapered pipe (5), the energy storage mechanism (6), and the buffer mechanism (7) are all Located in the casing (8), the inlet ends of the liquid inlet pipe (1) and the inlet pipe (2) are drawn from the casing (8) to connect with external equipment, and the outlet ends of the straight pipe (3) are connected to the outer casing (8) Lead out to connect with external equipment.
  • the guide sleeve (73) is fixed inside the casing (8).
  • a one-way valve (11) is also installed on the liquid inlet pipe (1).
  • a digital air pressure gauge (21) and a digital hydraulic pressure gauge (12) are respectively installed on the air inlet pipe (2) and the liquid inlet pipe (1).
  • the present invention also provides a compressed air foam fire extinguishing system, comprising a foam liquid supply system, a compressed air supply system, a foam injection system, and the above-mentioned air mixer; the outlet end of the foam liquid supply system and the liquid inlet pipe (1)
  • the inlet end of the compressed air supply system is connected to the inlet end of the air intake pipe (2), and the inlet end of the foam injection system is connected to the outlet end of the second conical pipe (5).
  • the invention provides an air mixer for a compressed air foam fire extinguishing system, which transports foam liquid and compressed air respectively through a liquid inlet pipe and an air inlet pipe.
  • the cross-section is different, the foam liquid and compressed air reach the output end of the first tapered pipe, the path becomes narrow, and in the process of compression, the foam liquid can be fully mixed under the action of high-pressure air flow, and the mixed foam liquid reaches the perforated plate of the straight pipe, It can be mixed twice.
  • the second conical tube When it is discharged through the second conical tube, the path becomes wider and it is in the release state.
  • the mixing quality of the foam liquid is improved during the process of compression and release, and the fire extinguishing effect of the foam liquid can be fully exerted.
  • the guide post is guided, the damping spring can be limited by the guide post, the straight pipe can be supported by the damping spring, and the kinetic energy of the straight pipe can be absorbed.
  • the straight pipe is not easy to vibrate and has good stability .
  • the invention provides an air mixer for a compressed air foam fire extinguishing system, which adopts an energy storage spring to support the piston, can store energy, and can guide and limit the piston through the energy storage tube.
  • the gas can pressurize the piston, and the piston can transmit the pressure to the energy storage spring under the pressure, which can compress the energy storage spring, thereby absorbing the impact of the sudden increase of air pressure, providing buffer for the pipeline, and the pipeline is not easy to be damaged.
  • the air pressure inside the intake pipe returns to normal pressure, it can stop applying pressure to the piston, and the energy storage spring can push the piston to reset.
  • the damping spring works together with the rubber block to further reduce the impact of vibration.
  • Fig. 1 is the structural representation of the air mixer of compressed air foam fire extinguishing system in the embodiment of the present invention
  • Fig. 2 is the schematic diagram of the enlarged structure of the energy storage mechanism in Fig. 1;
  • Fig. 3 is the enlarged schematic diagram of the buffer mechanism in Fig. 1;
  • Fig. 4 is a structural schematic view of the air mixer for the compressed air foam fire extinguishing system including the shell in the embodiment of the present invention.
  • This embodiment discloses an air mixer for a compressed air foam fire extinguishing system, as shown in FIG. Mechanism 6, buffer mechanism 7;
  • the first tapered pipe 4 is a three-way pipe, which has a large diameter end and a small diameter end respectively, and an opening is opened on the pipe wall of the first tapered pipe 4.
  • the inlet pipe 2, the first conical pipe 4, the straight pipe 3, and the second conical pipe 5 are connected in sequence; according to the flow direction of the foam liquid, the liquid inlet pipe 1, the first conical pipe 4, the straight pipe 3, and the second conical pipe 5 are connected in sequence; the small diameter ends of the first tapered pipe 4 and the second tapered pipe 5 are connected with the inlet end and the outlet end of the straight pipe 3 respectively.
  • the energy storage mechanism 6 includes a blind pipe 61, a piston 62, an energy storage spring 63, and an opening on the pipe wall of the intake pipe 2. It communicates with the inner cavity of the intake pipe 2, the piston 62 is limited in the blind pipe 61, and the energy storage spring 63 is limited between the piston 62 and the bottom wall of the blind pipe 61; in this implementation, the energy storage spring 63 generally adopts a compression spring.
  • the buffer mechanism 7 includes a positioning ring 71, a guide post 72, a guide sleeve 73, and a damping spring 74; 71 is fixed on the guide post 72, and the guide post 72 is sleeved with a damping spring 74; one end of the guide post 72 is limited in the guide sleeve 73, and is slidably matched with the guide sleeve 73, and the vibration damping spring 74 is limited in the positioning ring 71 and the guide sleeve 73. Between the sleeves 73; the position of the guide sleeve 73 is fixed.
  • a perforated plate 31 is also fixed in the straight pipe 3 . After the foam liquid enters the straight pipe 3, it passes through the perforated plate 31 for further dispersion and mixing to improve the mixing effect.
  • this embodiment is also provided with a housing 8, which can be welded with stainless steel plates, and is generally a cubic structure, with a protective door 81 on the front side for easy viewing And maintenance is positioned at the situation of each parts in shell 8.
  • the straight pipe 3, the first tapered pipe 4, the second tapered pipe 5, the energy storage mechanism 6, and the buffer mechanism 7 are all located in the shell 8, and the inlet ends of the liquid inlet pipe 1 and the air inlet pipe 2 are drawn from the bottom wall of the shell 8 to connect with external equipment. Connection, the outlet end of the straight pipe 3 is drawn from the top wall of the shell 8, and connected with external equipment, generally connected with the pipeline of the foam spray gun.
  • the guide sleeve 73 is fixed inside the housing 8 .
  • the end of the guide post 72 away from the guide sleeve 73 abuts against the inner wall of the housing 8 , and a rubber pad 75 is fixed on the abutting surface to reduce vibration noise.
  • quick joints 9 are installed at the mouths of the liquid inlet pipe 1, the air inlet pipe 2, and the straight pipe 3 outside the casing 8, so as to realize quick connection with external equipment.
  • a one-way valve 11 is also installed on the liquid inlet pipe 1 , and the one-way valve 11 is located in the casing 8 .
  • a digital air pressure gauge 21 and a digital hydraulic pressure gauge 12 are respectively installed on the air inlet pipe 2 and the liquid inlet pipe 1.
  • the digital air pressure gauge 21 and the digital hydraulic pressure gauge 12 are located outside the housing 8 for real-time viewing.
  • This embodiment discloses a compressed air foam fire extinguishing system, including a foam liquid supply system, a compressed air supply system, a foam injection system, and the air mixer of Embodiment 1; the outlet end of the foam liquid supply system and the inlet of the liquid inlet pipe 1
  • the outlet end of the compressed air supply system is connected to the inlet end of the air inlet pipe 2, and the inlet end of the foam injection system is connected to the outlet end of the second tapered pipe 5.
  • the staff transports foam liquid and compressed air respectively through the liquid inlet pipe 1 and the air inlet pipe 2.
  • the compressed air and foam liquid pass through the first tapered pipe 4 and reach the straight pipe 3, due to the different cross-sections at both ends of the first tapered pipe 4, the foam liquid And the compressed air reaches the output end of the first tapered pipe 4, the path narrows, and in the compression process, the foam liquid can be fully mixed under the action of the high-pressure air flow, and the one-way valve 11 between the conduit and the liquid inlet pipe 1 can prevent the foam liquid from Recharge;
  • the mixed foam liquid reaches the perforated plate 31 of the straight pipe 3, and can be mixed twice through the plate holes of the perforated plate 31.
  • the path becomes wider and is in a released state.
  • the damping spring 74 can support the straight pipe 3, and the damping spring 74 cooperates with the rubber block 9 to work together to absorb the kinetic energy of the straight pipe 3.
  • the straight pipe 3 is not easy to vibrate and has good stability , the guide post 72 can be guided by the guide sleeve 73 , and the damping spring 74 can be limited by the guide post 72 .
  • the piston 62 is supported by an energy storage spring, which can store energy.
  • an energy storage spring which can store energy.
  • the compressed air is delivered through the intake pipe 2, when the air pressure is unstable and causes a sudden increase in air pressure, the gas can pressurize the piston 62, and the piston 62 can transmit the pressure to the energy storage when it is under pressure.
  • the spring can compress the energy storage spring, so that it can absorb the impact of the sudden increase in air pressure and provide buffer for the pipeline;
  • the staff turns on the digital display hydraulic pressure gauge 12 switch and the digital display air pressure gauge 21 switch respectively, and the hydraulic pressure inside the liquid inlet pipe 1 and the air pressure inside the air inlet pipe 2 can be monitored respectively through the digital display hydraulic pressure gauge 12 and the digital display air pressure gauge 21.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Pipe Accessories (AREA)

Abstract

本发明公开一种压缩空气泡沫灭火系统用空气混合器，通过进液管和进气管分别输送泡沫液和压缩空气，压缩空气和泡沫液通过第一锥管到达直管时，由于第一锥管两端的截面不一，泡沫液和压缩空气到达第一锥管的输出端、路径变窄，处于压缩过程，在高压气流的作用下可充分混合泡沫液，混合后的泡沫液到达直管的多孔板，能够二次混合，通过第二锥管排出时，路径变宽，处于释放状态，在压缩与释放的过程中提高了泡沫液的混合质量，能够充分发挥泡沫液的灭火效果，通过缓冲机构和储能机构能够降低振动及气压变化带来的破坏力。

Description

压缩空气泡沫灭火系统用空气混合器及灭火系统 技术领域
本发明涉及消防安全技术领域，具体来说是一种压缩空气泡沫灭火系统用空气混合器及灭火系统。
背景技术
“消防”即是消除隐患，预防灾患，狭义的意思在人们认识初期是扑灭火灾的意思,主要包括火灾现场的人员救援，重要设施设备、文物的抢救，重要财产的安全保卫与抢救，扑灭火灾等；
在消防灭火中会使用到泡沫液灭火，目前的压缩空气泡沫灭火系统一般将泡沫与水直接进行简单的混合后通过压缩空气喷出，这样的混合质量较差，无法充分发挥泡沫液的灭火效果，在输送压缩空气时，气压不稳定容易导致管道破损。
如申请号为201120525546.0公开的一种集成式全自动压缩空气泡沫灭火系统，当系统启动正常工作后，水由泵的入口进入系统，此时泵可以像一般消防泵一样仅打水消防，其中低压性能与普通车载泵性能完全一样；若此时开启消防泵上的B类泡沫混合器阀门，则可以实现B类消防灭火的要求；若此时打开泡沫供液系统，让A类泡沫原液与水泵打出的带压的水混合，形成泡沫混合液，若此时供气管路的气动阀关闭，则系统打出水泡沫的混合液；供气系统气动阀门打开，水泡沫混合液与压缩空气混合，这时水泡沫混合液变成空气泡沫，由泡沫枪或炮打出，实现高效快速灭火；泡沫液的干湿程度可以通过控制注入压缩空气的流量来进行控制、可调；此外还可以关闭水路，系统向外只提供压缩空气流。该方案中通过压缩空气喷出泡沫混合液的同时进行空气与泡沫液进行混合。但是，对于气压不稳定的情况下，容易导致管道破裂。
发明内容
本发明所要解决的技术问题在于针对泡沫灭火器中压缩空气气压不稳易导致管道破裂，提供一种压缩空气泡沫灭火系统用空气混合器。
本发明通过以下技术手段实现解决上述技术问题的：
一种压缩空气泡沫灭火系统用空气混合器，包括进液管(1)、进气管(2)、直管(3)、第一锥管(4)、第二锥管(5)、储能机构(6)、缓冲机构(7)；所述第一锥管(4)为三通管；按照气流方向，进气管(2)、第一锥管(4)、直管(3)、第二锥管(5)依次连接，按照泡沫液流向，进液管(1)、第一锥管(4)、直管(3)、第二锥管(5)依次连接；所述第一锥管(4)、第二锥管(5)的小口径端分别与直管(3)的进口端、出口 端连接；
所述储能机构(6)包括盲管(61)、活塞(62)、储能弹簧(63)，盲管(61)的进口与进气管(2)管壁上的开口密封固定，盲管(61)内腔与进气管(2)内腔连通，活塞(62)限位在盲管(61)内，储能弹簧(63)限位在活塞(62)与盲管(61)的盲端之间；
所述缓冲机构(7)包括定位环(71)、导柱(72)、导套(73)、减振弹簧(74)；所述定位环(71)的外周设有限位槽，所述直管(3)限位在限位槽内，定位环(71)固定在导柱(72)上，导柱(72)上套设所述减振弹簧(74)；所述导柱(72)一端限位在导套(73)内，与导套(73)滑动配合，所述减振弹簧(74)限位在定位环(71)和导套(73)之间；所述导套(73)位置固定。
本发明通过进液管和进气管分别输送泡沫液和压缩空气，压缩空气和泡沫液通过第一锥管到达直管时，由于第一锥管两端的截面不一，泡沫液和压缩空气到达第一锥管的输出端、路径变窄，处于压缩过程，在高压气流的作用下可充分混合泡沫液，混合后的泡沫液到达直管的多孔板，能够二次混合，通过第二锥管排出时，路径变宽，处于释放状态，在压缩与释放的过程中提高了泡沫液的混合质量，能够充分发挥泡沫液的灭火效果，通过导套能够对导柱导向，通过导柱能够对减振弹簧限位，通过减振弹簧能够对直管支撑，能够吸收直管的动能，泡沫液和压缩空气经过直管时，直管不易振动，稳定性好。
采用储能弹簧支撑活塞、能够储能，通过储能管(盲管)能够对活塞导向和限位，通过进气管输送压缩空气时，气压不稳、导致气压陡增时，气体能够对活塞施压，活塞受到压力能够将压力传递至储能弹簧，可对储能弹簧进行压缩，从而能够吸收陡增气压的冲击力，可对管道提供缓冲，管道不易破损，进气管内部的气压恢复至常压时，能够停止对活塞施压，储能弹簧可推动活塞复位。
进一步的，所述储能机构(6)为两个，分别位于进气管(2)的同一侧或不同侧。
进一步的，所述缓冲机构(7)为两个，分别位于直管(3)的同侧或不同侧。
进一步的，所述直管(3)内还固定有多孔板31。
进一步的，空气混合器还包括外壳(8)，所述直管(3)、第一锥管(4)、第二锥管(5)、储能机构(6)、缓冲机构(7)均位于外壳(8)内，所述进液管(1)、进气管(2)的进口端从外壳(8)引出与外部设备连接，所述直管(3)的出口端从外壳(8)引出与外部设备连接。
进一步的，所述导套(73)固定在外壳(8)内部。
进一步的，所述导柱(72)远离导套(73)的一端抵接外壳(8)内壁，所述导柱(72)的抵接面固定有橡胶垫(75)。
进一步的，所述进液管(1)上还安装有单向阀(11)。
进一步的，在所述进气管(2)和进液管(1)上分别安装有数显气压表(21)和数显液压表(12)。
本发明还提供一种压缩空气泡沫灭火系统，包括泡沫液供应系统、压缩空气供应系统、泡沫喷射系统，及上述的空气混合器；所述泡沫液供应系统的出口端与进液管(1)的进口端连接，压缩空气供应系统的出口端与进气管(2)的进口端连接，所述泡沫喷射系统的进口端与第二锥管(5)的出口端连接。
本发明的优点在于：
本发明提供压缩空气泡沫灭火系统用空气混合器，通过进液管和进气管分别输送泡沫液和压缩空气，压缩空气和泡沫液通过第一锥管到达直管时，由于第一锥管两端的截面不一，泡沫液和压缩空气到达第一锥管的输出端、路径变窄，处于压缩过程，在高压气流的作用下可充分混合泡沫液，混合后的泡沫液到达直管的多孔板，能够二次混合，通过第二锥管排出时，路径变宽，处于释放状态，在压缩与释放的过程中提高了泡沫液的混合质量，能够充分发挥泡沫液的灭火效果，通过导套能够对导柱导向，通过导柱能够对减振弹簧限位，通过减振弹簧能够对直管支撑，能够吸收直管的动能，泡沫液和压缩空气经过直管时，直管不易振动，稳定性好。
本发明提供压缩空气泡沫灭火系统用空气混合器，采用储能弹簧支撑活塞、能够储能，通过储能管能够对活塞导向和限位，通过进气管输送压缩空气时，气压不稳、导致气压陡增时，气体能够对活塞施压，活塞受到压力能够将压力传递至储能弹簧，可对储能弹簧进行压缩，从而能够吸收陡增气压的冲击力，可对管道提供缓冲，管道不易破损，进气管内部的气压恢复至常压时，能够停止对活塞施压，储能弹簧可推动活塞复位。
减振弹簧配合橡胶块共同工作，进一步降低振动影响。
附图说明
图1为本发明实施例中压缩空气泡沫灭火系统用空气混合器的结构示意图；
图2为图1中储能机构的放大结构示意图；
图3为图1中缓冲机构的放大结构示意图；
图4为本发明实施例中压缩空气泡沫灭火系统用空气混合器包括外壳的结构示意 图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本实施例公开一种压缩空气泡沫灭火系统用空气混合器，如图1所示，包括进液管1、进气管2、直管3、第一锥管4、第二锥管5、储能机构6、缓冲机构7；第一锥管4为三通管，分别有大口径端、小口径端、以及在第一锥管4的管壁上开设开口。按照气流方向，进气管2、第一锥管4、直管3、第二锥管5依次连接；按照泡沫液流向，进液管1、第一锥管4、直管3、第二锥管5依次连接；第一锥管4、第二锥管5的小口径端分别与直管3的进口端、出口端连接。
如图2所示，储能机构6包括盲管61、活塞62、储能弹簧63、在进气管2的管壁上开口，盲管61的进口与所述开口密封固定，盲管61内腔与进气管2内腔连通，活塞62限位在盲管61内，储能弹簧63限位在活塞62与盲管61底壁之间；本实施中储能弹簧63一般采用压簧。
如图3所示，缓冲机构7包括定位环71、导柱72、导套73、减振弹簧74；定位环71的外周设有限位槽，直管3限位在限位槽内，定位环71固定在导柱72上，导柱72上套设减振弹簧74；导柱72一端限位在导套73内，与导套73滑动配合，减振弹簧74限位在定位环71和导套73之间；导套73位置固定。
本实施例中，储能机构6为两个，分别位于进气管2的同一侧或不同侧，以提高应变气体压力变化能力。
本实施例中，缓冲机构7为两个，分别位于直管3的同侧或不同侧，以保证缓冲效果。
为了保证泡沫液的充分混合，直管3内还固定有多孔板31。泡沫液进入直管3后，经过多孔板31进一步分散混合，提高混合效果。
如图4所示，为了使空气混合器结构更加稳定可靠，本实施例还设置有外壳8，外壳8可采用不锈钢板焊接制得，大体为立方体结构，前侧开有防护门81，便于查看和维修位于外壳8内各部件的情况。直管3、第一锥管4、第二锥管5、储能机构6、缓冲机构7均位于外壳8内，进液管1、进气管2的进口端从外壳8底壁引出与外部设备连接， 直管3的出口端从外壳8顶壁引出，与外部设备连接，一般与泡沫喷枪的管道连接。导套73固定在外壳8内部。导柱72远离导套73的一端抵接外壳8内壁，抵接面固定有橡胶垫75，以降低振动噪音。为了便于快速连接，本实施例在进液管1、进气管2、直管3位于外壳8外部的管口安装有快速接头9，能够实现快速与外部设备连接。
本实施例还在进液管1上还安装有单向阀11，单向阀11位于外壳8内。在进气管2和进液管1上分别安装有数显气压表21和数显液压表12，数显气压表21和数显液压表12位于外壳8外，便于实时查看。
实施例2
本实施例公开一种压缩空气泡沫灭火系统，包括泡沫液供应系统、压缩空气供应系统、泡沫喷射系统，及实施例1的空气混合器；泡沫液供应系统的出口端与进液管1的进口端连接，压缩空气供应系统的出口端与进气管2的进口端连接，所述泡沫喷射系统的进口端与第二锥管5的出口端连接。
工作原理：
工作人员通过进液管1和进气管2分别输送泡沫液和压缩空气，压缩空气和泡沫液通过第一锥管4到达直管3时，由于第一锥管4两端的截面不一，泡沫液和压缩空气到达第一锥管4的输出端、路径变窄，处于压缩过程，在高压气流的作用下可充分混合泡沫液，导管与进液管1之间的单向阀11可防止泡沫液回灌；
混合后的泡沫液到达直管3的多孔板31，通过多孔板31的板孔能够二次混合，通过第二锥管5排出时，路径变宽，处于释放状态，在压缩与释放的过程中能够提高泡沫液的混合质量；
泡沫液和压缩空气经过直管3时，减振弹簧74能够对直管3支撑，减振弹簧74配合橡胶块9共同工作，能够吸收直管3的动能，直管3不易振动，稳定性好，通过导套73能够对导柱72导向，通过导柱72能够对减振弹簧74限位。
采用储能弹簧支撑活塞62、能够储能，通过进气管2输送压缩空气时，气压不稳、导致气压陡增时，气体能够对活塞62施压，活塞62受到压力能够将压力传递至储能弹簧，可对储能弹簧进行压缩，从而能够吸收陡增气压的冲击力，可对管道提供缓冲；
进气管2内部的气压恢复至常压时，能够停止对活塞62施压，储能弹簧推动活塞62复位，在此过程中，盲管61能够对活塞62导向和限位，活塞62不易倾斜；
工作人员分别打开数显液压表12开关和数显气压表21开关，通过数显液压表12和数显气压表21能够分别监测进液管1内部的液压和进气管2内部的气压。
以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (10)

  1. 一种压缩空气泡沫灭火系统用空气混合器，其特征在于，包括进液管(1)、进气管(2)、直管(3)、第一锥管(4)、第二锥管(5)、储能机构(6)、缓冲机构(7)；所述第一锥管(4)为三通管；按照气流方向，进气管(2)、第一锥管(4)、直管(3)、第二锥管(5)依次连接，按照泡沫液流向，进液管(1)、第一锥管(4)、直管(3)、第二锥管(5)依次连接；所述第一锥管(4)、第二锥管(5)的小口径端分别与直管(3)的进口端、出口端连接；
    所述储能机构(6)包括盲管(61)、活塞(62)、储能弹簧(63)，盲管(61)的进口与进气管(2)管壁上的开口密封固定，盲管(61)内腔与进气管(2)内腔连通，活塞(62)限位在盲管(61)内，储能弹簧(63)限位在活塞(62)与盲管(61)的盲端之间；
    所述缓冲机构(7)包括定位环(71)、导柱(72)、导套(73)、减振弹簧(74)；所述定位环(71)的外周设有限位槽，所述直管(3)限位在限位槽内，定位环(71)固定在导柱(72)上，导柱(72)上套设所述减振弹簧(74)；所述导柱(72)一端限位在导套(73)内，与导套(73)滑动配合，所述减振弹簧(74)限位在定位环(71)和导套(73)之间；所述导套(73)位置固定。
  2. 根据权利要求1所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，所述储能机构(6)为两个，分别位于进气管(2)的同一侧或不同侧。
  3. 根据权利要求1所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，所述缓冲机构(7)为两个，分别位于直管(3)的同侧或不同侧。
  4. 根据权利要求1至3任一所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，所述直管(3)内还固定有多孔板(31)。
  5. 根据权利要求4所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，空气混合器还包括外壳(8)，所述直管(3)、第一锥管(4)、第二锥管(5)、储能机构(6)、缓冲机构(7)均位于外壳(8)内，所述进液管(1)、进气管(2)的进口端从外壳(8)引出与外部设备连接，所述直管(3)的出口端从外壳(8)引出与外部设备连接。
  6. 根据权利要求5所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，所述导套(73)固定在外壳(8)内部。
  7. 根据权利要求6所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，所述导柱(72)远离导套(73)的一端抵接外壳(8)内壁，所述导柱(72)的抵接面 固定有橡胶垫(75)。
  8. 根据权利要求1至3任一所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，所述进液管(1)上还安装有单向阀(11)。
  9. 根据权利要求1至3任一所述的一种压缩空气泡沫灭火系统用空气混合器，其特征在于，在所述进气管(2)和进液管(1)上分别安装有数显气压表(21)和数显液压表(12)。
  10. 一种压缩空气泡沫灭火系统，其特征在于，包括泡沫液供应系统、压缩空气供应系统、泡沫喷射系统，及权利要求1至9任一所述的空气混合器；所述泡沫液供应系统的出口端与进液管(1)的进口端连接，压缩空气供应系统的出口端与进气管(2)的进口端连接，所述泡沫喷射系统的进口端与第二锥管(5)的出口端连接。
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