CN109381825A - Bottle group type fine water mist fire-extinguishing system - Google Patents

Bottle group type fine water mist fire-extinguishing system Download PDF

Info

Publication number
CN109381825A
CN109381825A CN201710666909.4A CN201710666909A CN109381825A CN 109381825 A CN109381825 A CN 109381825A CN 201710666909 A CN201710666909 A CN 201710666909A CN 109381825 A CN109381825 A CN 109381825A
Authority
CN
China
Prior art keywords
valve
fire
chip microcontroller
group type
extinguishing system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710666909.4A
Other languages
Chinese (zh)
Inventor
董加强
仇智珩
卢杰
黄思杰
弋建州
周路
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING FIRE EQUIPMENT CO Ltd
Original Assignee
NANJING FIRE EQUIPMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NANJING FIRE EQUIPMENT CO Ltd filed Critical NANJING FIRE EQUIPMENT CO Ltd
Priority to CN201710666909.4A priority Critical patent/CN109381825A/en
Publication of CN109381825A publication Critical patent/CN109381825A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C27/00Fire-fighting land vehicles
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/005Delivery of fire-extinguishing material using nozzles
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/02Nozzles specially adapted for fire-extinguishing
    • A62C31/03Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • A62C37/36Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device

Landscapes

  • 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)

Abstract

The invention discloses bottle group type fine water mist fire-extinguishing systems.It includes extinguishing device and pressurizing device, the extinguishing device includes water tank, conveyance conduit and control device, the pressurizing device includes compressed gas cylinder and gas pipeline, it is provided on the water tank into water quick-joint valve, liquidometer, blowdown valve and electro connecting pressure gauge and outlet valve, the conveyance conduit is connected to outlet valve, pressure gauge and nozzle are provided on the conveyance conduit, pressure regulator valve is provided on compressed gas cylinder, one end of gas pipeline and pressure regulator valve, the other end is connected to water tank, solenoid valve is provided on the gas pipeline, control device includes single-chip microcontroller, display screen and control button.The present invention realizes water mists and sprays without external power supply, can measure the size and location of the intensity of a fire, can be realized the automatically walk of fire extinguishing system, the size of water mists is adjusted by way of compressed gas vial-type.

Description

Bottle group type fine water mist fire-extinguishing system
Technical field
The present invention relates to bottle group type fine water mist fire-extinguishing systems, belong to technical field of fire control.
Background technique
There are two types of fine water mist fire-extinguishing systems: pump group formula fine water mist fire-extinguishing system and bottle group type fine water mist fire-extinguishing system.Pump group Formula fine water mist fire-extinguishing system can be provided stable water source by pump group, and system output is stablized.Traditional bottle group type fine water mist fire-extinguishing system It directly drives water source to export water mists using compressed gas, does not have pressure-reduced and-regulated facility, structure is simple, output nonlinear.It is high-end The water mists application requirement that disappears of industrial circle is stablized by spraying, requires to the sustained firing time.
Traditional bottle group type fine water mist fire-extinguishing system directly drives water source to export water mists using compressed gas, does not have decompression steady Press facility;System pipe network is designed by compressed gas source maximum pressure, at high cost;System jet pressure insists on continuous variation, and injecting time is not Stablize;The consecutive variations such as spray intensity.Industrial circle fire-fighting temperature reduction rate cannot preferably be met and continuous injecting time is wanted The application asked.
Summary of the invention
In view of this, by way of compressed gas vial-type, being realized the present invention provides bottle group type fine water mist fire-extinguishing system Water mists are sprayed without external power supply, can be measured the size and location of the intensity of a fire, be can be realized the automatic of fire extinguishing system The size of water mists is adjusted in walking.
The present invention solves above-mentioned technical problem by following technological means:
Bottle group type fine water mist fire-extinguishing system of the invention comprising extinguishing device and pressurizing device, the extinguishing device packet Water tank, conveyance conduit and control device are included, the pressurizing device includes compressed gas cylinder and gas pipeline, is set on the water tank It being equipped with into water quick-joint valve, liquidometer, blowdown valve and electro connecting pressure gauge and outlet valve, the conveyance conduit is connected to outlet valve, It is provided with pressure gauge and nozzle on the conveyance conduit, pressure regulator valve, one end of gas pipeline and pressure regulation are provided on compressed gas cylinder Valve, the other end are connected to water tank, are provided with solenoid valve on the gas pipeline, control device include single-chip microcontroller, display screen and Control button.
The extinguishing device and pressurizing device are located on waggon, and direct current generator is provided on the waggon, are utilized Pulse modulation technology dynamic controls direct current generator rotation direction and revolving speed, is provided with flame sensor on the waggon, described Single-chip microcontroller is connected to power module, and power module provides power supply, the control circuit of SCM peripheral for single-chip microcontroller and direct current generator The driving circuit of voltage regulator circuit, direct current generator including power module and the interface circuit of flame sensor.
Liquid level is calculated as magnetostriction liquidometer, and the bottom of water tank is elliposoidal structure, and blowdown valve is arranged at water tank bottom Portion, outlet valve are arranged in the bottom side of water tank, are provided with filter screen on outlet valve.
It is provided with nRF24L01 type monolithic radio frequency transceiving chip on the single-chip microcontroller, has on monolithic radio frequency transceiving chip wireless Single-chip microcontroller wireless communication module is set emission mode by signal receiving modes, and the chip operation is in 2.4~2.5GHz ISM frequency Section, frequency synthesizer, power amplifier, crystal oscillator and modulator built in monolithic radio frequency transceiving chip, monolithic radio frequency transmitting-receiving The output power and communication channel of chip are configured by single-chip microcontroller.
The single-chip microcontroller is 89C405l single-chip microcontroller, and P0 mouthfuls are used for numeral method, the P1 mouthfuls of pulsewidths for direct current generator 30 Drive control is modulated, P2, P3 mouthfuls of data acquisitions for flame sensor 31 are controlled with interruption.
Flame sensor judges the power that whether there is fire source and fire source in room, root by the infrared remote receiver of multichannel The distance and size that can be determined that fire source according to the power of fire source, feed back to single-chip microcontroller.
Electro connecting pressure gauge is connect with pressure regulator valve, and electro connecting pressure gauge controls the pressure size of pressure regulator valve.
Annular groove is provided on nozzle, the annular groove is provided with water outlet on one side, and the another side of annular groove is provided with Curved baffle, curved baffle are connect with the swivel becket for covering in nozzle exterior.
Band voltage-stabilizing system bottle group type fine water mist fire-extinguishing system uses high pressure compressed nitrogen as driving source, by being specifically designed Pressure regulator valve realize pressure-reduced and-regulated, stablize big flow output driving gas, drive water container in extinguishing chemical, pass through pipeline, reach Fine mist spray head, stable injection water mists reach uniform decrease in temperature fire extinguishing.
Provide application scheme of the stable-pressure device on bottle group type fine water mist fire-extinguishing system;It is steady to provide bottle group type water mists Pressure output, the sustained firing time is controllable, the accurate solution of fluid calculation, promotes the engineering of bottle group type fine water mist fire-extinguishing system Using design accuracy, reliability.
The advantages of present invention is compared with pump group formula fine water mist fire-extinguishing system: being not necessarily to electrical source of power, and extinguishing chemical normal pressure in storage bottle stores up It deposits;The advantages of more former bottle group type fine water mist fire-extinguishing system: water mists output is stablized, and rate of temperature fall is uniform, and the sustained firing time can Control, fluid calculation are accurate.
It controls the movement of waggon and by flame sensor using single-chip microcontroller come the size of sensory-perceptible flame, leads to Display screen is crossed to show.The transmission with exogenous data is realized by monolithic radio frequency transceiving chip.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the driving circuit of direct current generator of the present invention.
Fig. 3 is single-chip microcontroller control figure of the present invention.
Fig. 4 is the sectional view of nozzle of the present invention.
Structural schematic diagram when Fig. 5 is nozzle standard-sized sheet of the present invention.
Specific embodiment
Below with reference to attached drawing, the present invention is described in detail, as shown in Fig. 1,2,3,4,5: the bottle group type of the present embodiment Fine water mist fire-extinguishing system comprising extinguishing device 1 and pressurizing device 2, the extinguishing device 1 include water tank 10, conveyance conduit 11 and control device 12, the pressurizing device 2 includes compressed gas cylinder 20 and gas pipeline 21, be provided on the water tank 10 into Water quick-joint valve 100, liquidometer 101, electro connecting pressure gauge 102, safety relief valve 103, outlet valve 104 and blowdown valve 105, it is described Conveyance conduit 11 is connected to outlet valve 104, and pressure gauge 111 and nozzle 112, compressed gas cylinder 20 are provided on the conveyance conduit 11 On be provided with pressure regulator valve 200, one end of gas pipeline 21 and pressure regulator valve 200, the other end are connected to water tank 10, the appendix Solenoid valve 210 is provided on road 21, control device 12 includes single-chip microcontroller 120, display screen 121 and control button 122.
The extinguishing device 1 and pressurizing device 2 are located on waggon 3, are provided with direct current generator on the waggon 3 30, using pulse modulation technology dynamic control direct current generator rotation direction and revolving speed, flame sensing is provided on the waggon 3 Device 31, the single-chip microcontroller 120 are connected to power module 32, and power module 32 is that single-chip microcontroller 120 and direct current generator 30 provide power supply, The control circuit of 120 periphery of single-chip microcontroller includes that the voltage regulator circuit of power module 32, the driving circuit of direct current generator 30 and flame pass The interface circuit of sensor 31.
Liquidometer 101 is magnetostriction liquidometer, and the bottom of water tank 10 is elliposoidal structure, and the setting of blowdown valve 102 exists 10 bottom of water tank, outlet valve 104 are arranged in the bottom side of water tank 10, filter screen 105 are provided on outlet valve 104.
It is provided with nRF24L01 type monolithic radio frequency transceiving chip on the single-chip microcontroller 120, has on monolithic radio frequency transceiving chip Single-chip microcontroller wireless communication module is set emission mode by reception of wireless signals mode, and the chip operation is in 2.4~2.5GHz ISM band, frequency synthesizer, power amplifier, crystal oscillator and modulator, monolithic radio frequency built in monolithic radio frequency transceiving chip The output power and communication channel of transceiving chip are configured by single-chip microcontroller 120.
The single-chip microcontroller 120 is 89C405l single-chip microcontroller, and P0 mouthfuls are used for numeral method, and P1 mouthfuls for direct current generator 30 Pulsewidth modulation drive control, P2, P3 mouthfuls of data acquisitions for flame sensor 31 are controlled with interruption.
Flame sensor 31 judges the power that whether there is fire source and fire source in room by the infrared remote receiver of multichannel, The distance and size that can be determined that fire source according to the power of fire source, feed back to single-chip microcontroller 120.
Electro connecting pressure gauge 102 is connect with pressure regulator valve 200, and the pressure that electro connecting pressure gauge 102 controls pressure regulator valve 200 is big It is small.
Annular groove 113 is provided on nozzle 112, the annular groove 113 is provided with water outlet 114, annular groove 113 on one side Another side be provided with curved baffle 115, curved baffle 115 is connect with the swivel becket 116 covered outside nozzle 112.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (8)

1. bottle group type fine water mist fire-extinguishing system, it is characterised in that: including extinguishing device (1) and pressurizing device (2), the fire extinguishing dress Setting (1) includes water tank (10), conveyance conduit (11) and control device (12), and the pressurizing device (2) includes compressed gas cylinder (20) and gas pipeline (21) it, is provided on the water tank (10) into water quick-joint valve (100), liquidometer (101), electric contact pressure Power table (102), safety relief valve (103), outlet valve (104) and blowdown valve (105), the conveyance conduit (11) and outlet valve (104) it is connected to, is provided with pressure gauge (111) and nozzle (112) on the conveyance conduit (11), compressed gas cylinder is provided on (20) One end of pressure regulator valve (200), gas pipeline (21) is connect with pressure regulator valve (200), and the other end is connected to water tank (10), described defeated It is provided in feed channel (21) solenoid valve (210), control device (12) includes that single-chip microcontroller (120), display screen (121) and control are pressed Button (122).
2. bottle group type fine water mist fire-extinguishing system according to claim 1, it is characterised in that: the extinguishing device (1) and add Pressure device (2) is located on waggon (3), is provided with direct current generator (30) on the waggon (3), is utilized pulse modulation technology Dynamic controls direct current generator rotation direction and revolving speed, is provided with flame sensor (31), the single-chip microcontroller on the waggon (3) (120) it is connected to power module (32), power module (32) is single-chip microcontroller (120) and direct current generator (30) provides power supply, monolithic The control circuit of machine (120) periphery includes the driving circuit and flame of the voltage regulator circuit of power module (32), direct current generator (30) The interface circuit of sensor (31).
3. bottle group type fine water mist fire-extinguishing system according to claim 1, it is characterised in that: liquidometer (101) is stretched for mangneto Contracting liquidometer, the bottom of water tank (10) are elliposoidal structure, and blowdown valve (105) is arranged in water tank (10) bottom, outlet valve (104) bottom side in water tank (10) is set, and outlet valve (104) input end is provided with filter screen (106).
4. bottle group type fine water mist fire-extinguishing system according to claim 1, it is characterised in that: set on the single-chip microcontroller (120) It is equipped with nRF24L01 type monolithic radio frequency transceiving chip, there are wireless signal receiving modes on monolithic radio frequency transceiving chip, by single-chip microcontroller (120) wireless communication module is set as emission mode, which receives in 2.4~2.5GHz ISM band, monolithic radio frequency Send out built-in chip type frequency synthesizer, power amplifier, crystal oscillator and modulator, the output power of monolithic radio frequency transceiving chip It is configured with communication channel by single-chip microcontroller (120).
5. bottle group type fine water mist fire-extinguishing system according to claim 1, it is characterised in that: the single-chip microcontroller (120) is 89C405l single-chip microcontroller, P0 mouthfuls are used for numeral method, the P1 mouthfuls of pulsewidth modulation drive controls for direct current generator (30), P2, P3 Data acquisition and interruption control of the mouth for flame sensor (31).
6. bottle group type fine water mist fire-extinguishing system according to claim 2, it is characterised in that: flame sensor (31) is by multi-pass The infrared remote receiver in road judges the power that whether there is fire source and fire source in room, can be determined that fire source according to the power of fire source Distance and size, feed back to single-chip microcontroller (120).
7. bottle group type fine water mist fire-extinguishing system according to claim 1, it is characterised in that: electro connecting pressure gauge (102) with Pressure regulator valve (200) connection, electro connecting pressure gauge (102) control the pressure size of pressure regulator valve (200).
8. bottle group type fine water mist fire-extinguishing system according to claim 1, it is characterised in that: nozzle is provided with ring on (112) Shape slot (113), the annular groove (113) are provided with water outlet (114) on one side, and the another side of annular groove (113) is provided with arc Shape baffle (115), curved baffle (115) are connect with the swivel becket (116) covered outside nozzle (112).
CN201710666909.4A 2017-08-07 2017-08-07 Bottle group type fine water mist fire-extinguishing system Pending CN109381825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710666909.4A CN109381825A (en) 2017-08-07 2017-08-07 Bottle group type fine water mist fire-extinguishing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710666909.4A CN109381825A (en) 2017-08-07 2017-08-07 Bottle group type fine water mist fire-extinguishing system

Publications (1)

Publication Number Publication Date
CN109381825A true CN109381825A (en) 2019-02-26

Family

ID=65413543

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710666909.4A Pending CN109381825A (en) 2017-08-07 2017-08-07 Bottle group type fine water mist fire-extinguishing system

Country Status (1)

Country Link
CN (1) CN109381825A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110314308A (en) * 2019-04-10 2019-10-11 武汉理工大学 A kind of movable type jet stream induction fine mist fire-fighting smoke depressant systems
CN110926233A (en) * 2019-12-04 2020-03-27 中国人民解放军火箭军工程大学 Voltage stabilizing device for high-pressure water mist throttling system and voltage stabilizing control method thereof
CN114796947A (en) * 2022-04-02 2022-07-29 中国兵器工业火炸药工程与安全技术研究院 Modular movable rapid rain system

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2502732Y (en) * 2001-10-15 2002-07-31 浙江万安达消防设备有限公司 Fire extinguisher with atomization device
CN2589011Y (en) * 2002-12-23 2003-12-03 中国科学技术大学 Can type thin water spray fire extinguishing device
CN2870900Y (en) * 2005-12-20 2007-02-21 宋明韬 Cabinet superfine dry-powdery extinguisher
CN101301516A (en) * 2008-06-30 2008-11-12 北京海安高科消防技术有限公司 Nitrogen sprayer head
CN203834575U (en) * 2014-05-19 2014-09-17 天津金大源消防设备有限公司 Gas top pressure fire-fighting water supply device
CN104208835A (en) * 2014-09-22 2014-12-17 中煤科工集团重庆研究院有限公司 Liquid carbon dioxide fire extinguishing device for emergency rescue in disaster areas
CN104344215A (en) * 2014-10-31 2015-02-11 湖南新新线缆有限公司 Control device and method for supply of shielding gas for annealing tank
CN105920763A (en) * 2016-06-13 2016-09-07 西安新竹防灾救生设备有限公司 Variable-diameter type pore plate device
CN106139488A (en) * 2016-08-12 2016-11-23 福建天广消防有限公司 A kind of dry-chemical fire extinguishing release control device and powder extinguishing system
CN205988831U (en) * 2016-08-31 2017-03-01 湖南科技学院 A kind of electric-controlled type constant-pressure atomization device
CN205994825U (en) * 2016-04-15 2017-03-08 惠州市楷医科技有限公司 A kind of aerosol apparatus
CN206063607U (en) * 2016-08-27 2017-04-05 绍兴宏润消防器材有限公司 A kind of water-jet velocity and the adjustable fire-fighting lance of spray area
CN106730509A (en) * 2016-12-16 2017-05-31 国网湖南省电力公司 Portable constant pressure water mists gas two sprays fire extinguisher
CN207085132U (en) * 2017-08-07 2018-03-13 南京消防器材股份有限公司 Bottle group type fine water mist fire-extinguishing system

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2502732Y (en) * 2001-10-15 2002-07-31 浙江万安达消防设备有限公司 Fire extinguisher with atomization device
CN2589011Y (en) * 2002-12-23 2003-12-03 中国科学技术大学 Can type thin water spray fire extinguishing device
CN2870900Y (en) * 2005-12-20 2007-02-21 宋明韬 Cabinet superfine dry-powdery extinguisher
CN101301516A (en) * 2008-06-30 2008-11-12 北京海安高科消防技术有限公司 Nitrogen sprayer head
CN203834575U (en) * 2014-05-19 2014-09-17 天津金大源消防设备有限公司 Gas top pressure fire-fighting water supply device
CN104208835A (en) * 2014-09-22 2014-12-17 中煤科工集团重庆研究院有限公司 Liquid carbon dioxide fire extinguishing device for emergency rescue in disaster areas
CN104344215A (en) * 2014-10-31 2015-02-11 湖南新新线缆有限公司 Control device and method for supply of shielding gas for annealing tank
CN205994825U (en) * 2016-04-15 2017-03-08 惠州市楷医科技有限公司 A kind of aerosol apparatus
CN105920763A (en) * 2016-06-13 2016-09-07 西安新竹防灾救生设备有限公司 Variable-diameter type pore plate device
CN106139488A (en) * 2016-08-12 2016-11-23 福建天广消防有限公司 A kind of dry-chemical fire extinguishing release control device and powder extinguishing system
CN206063607U (en) * 2016-08-27 2017-04-05 绍兴宏润消防器材有限公司 A kind of water-jet velocity and the adjustable fire-fighting lance of spray area
CN205988831U (en) * 2016-08-31 2017-03-01 湖南科技学院 A kind of electric-controlled type constant-pressure atomization device
CN106730509A (en) * 2016-12-16 2017-05-31 国网湖南省电力公司 Portable constant pressure water mists gas two sprays fire extinguisher
CN207085132U (en) * 2017-08-07 2018-03-13 南京消防器材股份有限公司 Bottle group type fine water mist fire-extinguishing system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110314308A (en) * 2019-04-10 2019-10-11 武汉理工大学 A kind of movable type jet stream induction fine mist fire-fighting smoke depressant systems
CN110926233A (en) * 2019-12-04 2020-03-27 中国人民解放军火箭军工程大学 Voltage stabilizing device for high-pressure water mist throttling system and voltage stabilizing control method thereof
CN114796947A (en) * 2022-04-02 2022-07-29 中国兵器工业火炸药工程与安全技术研究院 Modular movable rapid rain system

Similar Documents

Publication Publication Date Title
CN109381825A (en) Bottle group type fine water mist fire-extinguishing system
US9878340B2 (en) Color application system and method for operating the same
JP2016209878A5 (en)
CN201802438U (en) Automatic spraying dust control device
CN210250955U (en) Multi-azimuth spraying self-cooling fire-fighting robot
CN110507937A (en) Fire-extinguishing apparatus
CN207085132U (en) Bottle group type fine water mist fire-extinguishing system
KR20120001141A (en) Equipment for monitoring fire
US9480208B2 (en) Offsite irrigation controller
ATE427164T1 (en) LIQUID SPRAY ADAPTER
CN110322874A (en) Hilly and mountainous land sprayer for use in garden Digiplex and faulty nozzle detection device
CN102627209B (en) Elevator sprinkling device
CN107125233B (en) Novel pesticide spraying device
CN211143185U (en) Fire hydrant
CN205164377U (en) Hand -held type air -pressure spray air dust purifier
CN204619248U (en) Reservoir pressure suspended type ultrafine dry powder extinguishing installation
CN111959786B (en) Fire extinguishing device for mist unmanned aerial vehicle, mist generator and mist unmanned aerial vehicle
CN105080021A (en) Pressure-storage suspension type superfine dry powder fire extinguishing device
CN101733223A (en) Pressure storage type agricultural chemical spraying device
CN115382126A (en) Storage fire control unit for industry thing networking
CN210555593U (en) Spraying device externally hung on agriculture and forestry of helicopter
MX2021005201A (en) Wireless variable pressure sprayer and method.
CN209700943U (en) A kind of plant protection drone plant protection external member
CN213280983U (en) Intelligent irrigation equipment
CN209048956U (en) A kind of Intelligent fire-fighting spray system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination