CN115790269A

CN115790269A - External air circuit, air fire extinguishing gun and use method thereof

Info

Publication number: CN115790269A
Application number: CN202211315237.XA
Authority: CN
Inventors: 樊百林; 直金达; 金松吉
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-14
Anticipated expiration: 2042-10-26
Also published as: CN115790269B

Abstract

The invention provides an external air path, an air fire-extinguishing gun and a using method thereof, wherein the fire-extinguishing gun comprises a bullet pushing device, a locking device, a firing device, an external air path and a gun body, the bullet pushing device pushes a fire-extinguishing bullet to a gun bore locking device to be locked so as to seal a gun bore, air pressure in two air chambers of the firing device is unequal through the external air path and the firing device so that high-pressure air enters the gun bore to fire the fire-extinguishing bullet, and after the fire is finished, an external control end controls each device to reset to prepare for next fire-extinguishing bullet; the vehicle-mounted or robot-controlled air cannon can be used for launching the fire extinguishing bomb through air pressure, the launching air pressure can be adjusted according to different fields and requirements to change the firing range, the fire extinguishing bomb is suitable for long-distance fire fighting, a fireman can be far away from the fire field to protect the safety of the fireman, the electric control air cannon is used for controlling the air cannon, the maneuverability is stronger, the fire extinguishing efficiency is improved, the production cost is lower, and batch production can be realized.

Description

External air circuit, air fire extinguishing gun and use method thereof

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to an external air circuit, an air fire extinguishing gun and a using method thereof.

Background

A fire refers to a disaster caused by combustion that is out of control in time or space. Among the various disasters, fire is one of the main disasters that threaten public safety and social development most often and most generally. Traditional fire faucet and fire extinguishing apparatus are only applicable to the work of putting out a fire of closely, and to the work such as the complicated topography, the big fire extinguishing difficulty is put out a fire and work such as high, far away, danger are then hard to be competent. For example, if a fire occurs in a super high-rise building with a height of 100 meters or more, fire extinguishing equipment such as a fire engine and an aerial ladder cannot reach a floor on fire at all because the floor is too high. The restriction of fire extinguishing equipment when a forest fire or a hazardous chemical plant fires necessitates that a firefighter enter the fire scene at a life risk during the fire fighting process, and therefore there is a strong need for a fire extinguishing equipment which is low in cost, high in performance and capable of extinguishing fires remotely.

The fire extinguishing gun is specially developed aiming at the characteristics that the fire condition of fire is complex and the fire extinguishing personnel can not extinguish the fire in a short distance. When a fire disaster occurs, a fire extinguisher or a fire extinguishing robot can carry the fire extinguishing cannon to enter a fire extinguishing area, and under the unified command of field commanders, the fire extinguishing cannon is launched to the fire extinguishing area to implement remote, efficient and safe fire extinguishing operation, so that the aims of quickly extinguishing or suppressing the fire disaster and avoiding casualties are fulfilled.

At present, the air cannon is mainly launched in three modes, namely electromagnetic launching, gunpowder launching and air pressure launching, because the electromagnetic launching mode is extremely high in cost, the danger degree of the gunpowder filling mode is high and difficult to control, and the storage and transportation of the explosive products are strictly limited, the air pressure launching is mostly adopted for the air cannons on the market, but the air cannons in the prior art also have some defects, such as a cone plug type air cannon which is complex in structure and difficult to produce in quantity, for example, a double-film-breaking type air cannon needs to replace a film, not only time consuming but also cost increasing, for example, a clamping and supporting type air cannon needs to be maintained seriously due to the fact that a clamping and locking mechanism needs to be used for a long time under certain strength requirements, for example, along with a tubular air cannon, the working principle of the air cannon is often maintained due to the fact that high-pressure gas pushes the fire-extinguishing cannon to launch by utilizing the control of a gas valve switch, and the problem that the air pressure quick loading is difficult easily occurs otherwise.

Disclosure of Invention

The embodiment of the invention provides an external air circuit, an air fire extinguishing gun and a using method thereof, which can adjust the emission air pressure according to different fields and requirements to change the range to realize remote fire fighting so that a fireman is far away from a fire scene to protect the safety of the fireman, and the air gun is controlled by an electric control, so that the maneuverability is stronger, the fire extinguishing efficiency is improved, the production cost is lower, and the batch production can be realized.

In order to solve the above object, the embodiments of the present invention provide the following technical solutions:

an external gas circuit, comprising:

the high-pressure gas source is respectively connected with the gas circuit I and the gas circuit II;

the gas path I is sequentially connected with a two-position two-way electromagnetic directional valve I, a one-way valve I, a pressure switch I, a safety valve I and an electric ball valve which are connected in parallel, and a gas path III is also connected on the gas path I between the pressure switch I and the safety valve I which are connected in parallel and the electric ball valve;

the gas path II is sequentially connected with a two-position two-way electromagnetic directional valve II, a one-way valve II, a pressure switch II and a safety valve II which are connected in parallel;

the two-position two-way electromagnetic directional valve I, the pressure switch I, the electric ball valve, the two-position two-way electromagnetic directional valve II and the pressure switch II are all electrically connected with a power supply facility and a controller.

An air fire-extinguishing gun comprises the external air path;

the gun body comprises a rear body tube, a gun tube and an outer body tube, wherein a bullet feeding groove is formed in the rear body tube, the bullet feeding groove is communicated with a bullet loading opening, and a locking device is arranged in the bullet feeding groove;

an inner bore is arranged inside the gun barrel, and a launching port is formed between the inner bore and the bullet feeding groove;

the outer barrel is arranged outside the gun barrel and the rear barrel, and a space between the outer barrel and the gun barrel is a launching air chamber and is provided with a launching air chamber air inlet; the space between the rear body tube and the outer body tube is a control air chamber, and is provided with a control air chamber air port;

a third air channel of the external air channel is connected with the air port of the control air chamber, and one end of the second air channel is connected with the air inlet of the emission air chamber;

firing devices are arranged in the control air chamber and the launching air chamber, each firing device comprises a spring and a piston connected with the spring, the piston can reciprocate in the control air chamber along the outer wall of the rear body tube, a limiting plate is arranged at the tail of the gun barrel, and the limiting plate can block the piston from moving towards the gun barrel;

the tail end of the rear body pipe is provided with a bullet pushing device, the bullet pushing device is connected with the locking device through a bullet pushing plate, and the bullet pushing device can push the locking device to reciprocate in the bullet feeding groove;

one end of the back pipe close to the control air chamber is provided with a bullet feeding groove limiting hole matched with a sliding block locking column of the locking device.

Preferably, the bullet pushing device comprises a motor, a screw rod and a bullet pushing plate, a notch is formed in the rear body tube, and the bullet pushing plate is connected with a screw rod nut at the notch through a bolt and is installed on the screw rod;

the motor is provided with a gear reducer, a motor shaft is provided with a driving gear and a driven gear, and a driven gear shaft is connected with the lead screw through a coupler;

the motor provides power to drive the screw rod to rotate synchronously, so that the screw rod nut can drive the bullet pushing plate to reciprocate in the bullet feeding groove through the notch.

Preferably, two ends of the notch are respectively provided with a first limit switch and a second limit switch;

the push spring plate is connected with the locking device and moves from one end of the notch to the other end of the notch, and when the lead screw nut touches the second limit switch, the locking device is locked. When the feed screw nut touches the limit switch, the spring pushing device resets.

Preferably, the spring is installed in the control air chamber, and the piston is normally located on the emission air port so as to block the emission air port and separate the control air chamber from the emission air chamber; and the transmitting air chamber is provided with an air pressure gauge.

Preferably, the piston width is greater than the transmission gas port width, just the piston with spring coupling's one end is equipped with the spring spacing groove, and the other end is equipped with the limiting plate and agrees with the groove, just the piston side surface is equipped with the sealing strip.

Preferably, the locking device comprises a locking core connected with the spring pushing plate, the locking core and the spring pushing plate are covered by a locking device shell, a spring pushing plate limiting groove is formed in the locking device shell, and the connecting end of the spring pushing plate and the lead screw nut extends out of the spring pushing plate limiting groove.

Preferably, a slide block guide rail is arranged on the lock core, one end of the slide block locking column slides on the slide block guide rail, the other end of the slide block locking column is inserted into a locking hole in the locking device shell, a return spring is arranged on the slide block locking column, and a miniature steel wheel is arranged at the end part of one end of the slide block locking column inserted into the locking hole; and a sealing plug fixing groove is formed in one end, close to the gun barrel, of the locking device shell, and a sealing plug is plugged in the sealing plug fixing groove.

Preferably, the sealing plug is made of elastic materials, and the distance from the sealing plug to the axis of the locking hole is larger than the distance from the tail of the fire extinguishing bomb in the inner bore to the projectile feeding groove limiting hole.

Preferably, the controller, the motor, the first limit switch and the second limit switch are electrically connected with a control end and a power supply facility.

An external gas circuit using method, the method using the external gas circuit, the method comprising the following steps:

s1, starting a launching preparation stage, controlling a first two-position two-way electromagnetic directional valve to be electrified and opened by a control end, and enabling high-pressure gas to enter a gas path III through the first two-position two-way electromagnetic directional valve and a check valve on the first gas path in sequence and then enter a control gas chamber;

s2, when the air pressure value in the control air chamber reaches a set air pressure value, triggering a first pressure switch to enable a first two-position two-way electromagnetic directional valve to be powered off and closed, wherein the air pressure value in the control air chamber is the set air pressure value;

s3, when the first two-position two-way electromagnetic reversing valve is powered off and closed, the control end controls the two-position two-way electromagnetic reversing valve to be powered on, and high-pressure gas enters the emission air chamber through the second two-position two-way electromagnetic reversing valve and the second one-way valve in sequence;

and S4, when the air pressure value in the emission air chamber reaches a set emission air pressure value, triggering a second pressure switch, and enabling the second two-position two-way electromagnetic directional valve to be powered off and closed by the second pressure switch, wherein the air pressure value in the emission air chamber is the emission air pressure, and ending the emission preparation stage.

Preferably, the set air pressure value of the first safety valve is higher than the set air pressure value of the control air chamber, and when the air pressure in the first air path exceeds the set air pressure value of the first safety valve, the first safety valve opens to exhaust air;

and the set air pressure value of the second safety valve is higher than the emission air pressure value, and when the air pressure in the second air path exceeds the set air pressure value of the second safety valve, the second safety valve is opened to exhaust air.

A method for using an air fire-extinguishing gun, which utilizes the external air circuit, the air fire-extinguishing gun and the external air circuit, and comprises the following steps:

s101, the initial positions of the projectile pushing device and the locking device of the air fire extinguishing gun are located at the tail end of the projectile feeding groove, a fire extinguishing projectile is loaded into the projectile feeding groove from the loading port, and the projectile pushing device and the locking device can push the fire extinguishing projectile to move towards the gun barrel;

s102, after the loading is finished, the control end controls the motor to be started, the motor enables the screw rod to rotate, the fire extinguishing bomb is pushed to move towards the inner bore direction by the bullet pushing plate under the action of the screw rod and the locking device, meanwhile, the control end controls the two-position two-way electromagnetic directional valve to be powered on and opened, the launching preparation stage begins, and the steps S1-S4 occur sequentially;

s103, after the launch preparation stage is finished, the piston is still in a normal position under the action of the spring, the lead screw nut of the projectile pushing device triggers a second limit switch in motion, the control end controls the motor to be turned off at the moment, the locking hole is overlapped with the projectile feeding groove limiting hole at the moment, the sliding block locking column is inserted into the projectile feeding groove limiting hole under the action of the reset spring and the locking cylinder, the locking device and the rear body pipe are fixed, the locking device is in a locking position at the moment, the fire extinguishing projectile is pushed into the inner bore at the moment, and the sealing plug of the locking device seals the inner bore and the front end of the projectile feeding groove to form a launch trajectory;

s104, when the locking device is locked, the control end controls the electric ball valve to be opened, gas in the control gas chamber is discharged through the electric ball valve, the pressure in the control gas chamber is obviously smaller than that in the launching gas chamber, high-pressure gas in the launching gas chamber pushes the piston to move towards the control gas chamber, the launching gas port is opened, the pressure in the launching trajectory is rapidly increased, and the fire extinguishing bomb is launched under the action of the high-pressure gas;

s105, after the fire extinguishing bomb is launched, the control air chamber and the launching air chamber are exhausted, the piston returns to a normal position under the action of the spring to close the launching air port, the control end controls the motor to start and rotate reversely, the bullet pushing plate moves towards the tail end of the bullet feeding groove under the action of the motor and the screw rod, the bullet pushing plate drives the lock closing cylinder to move, one end of a slider of the slider lock closing column slides on a slider guide rail of the lock closing cylinder to enable the slider lock closing column to retract, the slider lock closing column retracts under the action of the lock closing cylinder and the return spring until the slider lock closing column is separated from the bullet feeding groove limiting hole, the locking device is unlocked, the bullet pushing plate continues to move and moves to the tail end of the bullet pushing plate limiting groove, and the bullet pushing plate hooks the bullet pushing plate limiting groove to enable the whole locking device to follow the bullet pushing plate to move towards the tail end of the bullet feeding groove;

s106, when the screw nut of the bullet pushing device moves to touch the limit switch, the limit switch I sends a signal to the control end, the control end controls the motor to be turned off, at the moment, the bullet pushing device and the locking device return to the initial positions, and the bullet pushing device is reset to be finished;

and S107, after all the devices return to the initial positions, loading the next fire extinguishing bomb, and repeating the steps.

Compared with the prior art, the technical scheme at least has the following beneficial effects:

according to the technical scheme, the external air circuit and air fire extinguishing gun and the using method thereof can realize multiple launching modes of vehicle-mounted launching, manual launching and robot launching, can adjust launching air pressure and range to realize remote fire extinguishing and ensure safety of fire fighters, the firing device adopts the cooperation of the piston and the spring to avoid the problem that frequent maintenance and rapid air pressure loading are difficult, and the air gun is controlled by electric control, so that the maneuverability is stronger, the fire extinguishing efficiency is improved, the structure is simple, the mass production can be realized, and the production cost is lower.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a side sectional view of one embodiment of the air fire extinguisher of the present invention;

FIG. 2 is a schematic view of an external gas circuit according to the present invention;

FIG. 3 is a diagram of the ballistic trajectory of an embodiment of the air cannon of the present invention prior to firing;

FIG. 4 is a diagram of the ballistic trajectory of the fire of an embodiment of the air cannon of the present invention;

FIG. 5 is an overall block diagram of one embodiment of the air cannon of the present invention;

FIG. 6 is a block diagram of the firing mechanism of one embodiment of the air cannon of the present invention;

FIG. 7 is a schematic view of the piston of FIG. 6;

FIG. 8 is a side sectional view of the projectile charging device and the locking device of an embodiment of the air fire extinguisher according to the present invention;

FIG. 9 is a top cross-sectional view of a projectile charging device and a lockout device of an embodiment of the air cannon of the present invention;

FIG. 10 is a schematic view of the locking device of an embodiment of the air fire monitor of the present invention in an unlocked state;

FIG. 11 is a schematic view showing a locking state of a locking device of an embodiment of the air fire extinguisher according to the present invention;

FIG. 12 is an exploded view of the locking mechanism of an embodiment of the air fire extinguisher of the present invention;

FIG. 13 is an assembly view of the locking mechanism of one embodiment of the air cannon of the present invention;

FIG. 14 is a schematic view of the latch mechanism of one embodiment of the air fire extinguisher of the present invention shown in the feed slot;

fig. 15 is a schematic structural view of a projectile charging device of an embodiment of the air fire-fighting cannon of the present invention;

fig. 16 is a schematic structural view of a body of an air fire-extinguishing gun in accordance with an embodiment of the present invention;

FIG. 17 is a flowchart illustrating a method of using the external gas circuit according to the present invention;

FIG. 18 is a flowchart illustrating the method of use of an embodiment of the air cannon of the present invention.

Wherein the reference numerals are as follows:

1. a back barrel; 11. a bullet feeding groove; 12. a loading port; 2. a gun barrel; 21. an inner bore; 22. a transmission gas port; 3. an outer barrel; 31. a launch air chamber; 311. an air inlet of the launching air chamber; 32. controlling the air chamber; 321. controlling the air port of the air chamber; 33. a barometer; 4. a locking device; 41. a projectile feeding groove limiting hole; 42. a slider locking post; 421. a return spring; 422. a miniature steel wheel; 43. closing the lock cylinder; 431. a slider guide rail; 44. a locking device housing; 441. a limit groove of the push spring plate; 442. a locking hole; 45. a sealing plug; 451. a sealing plug fixing groove; 51; a spring; 52. a piston; 521. a spring limiting groove; 522. the limiting plate is matched with the groove; 523. a seal strip; 53. a limiting plate; 61. pushing the spring plate; 62. a motor; 63. a screw rod; 64. a notch; 641. a first limit switch; 642. a second limit switch; 65. a feed screw nut; 66. a gear reducer; 67. a coupling; 7. fire extinguishing bombs; 801. a high pressure gas source; 81. a first gas path; 82. a second gas path; 83. a third gas circuit; 811. a two-position two-way electromagnetic directional valve I; 812. a one-way valve I; 813. a first pressure switch; 814. a first safety valve; 815. an electric ball valve; 821. a second two-position two-way electromagnetic directional valve II; 822. a second one-way valve; 823. a second pressure switch; 824. and a second safety valve.

Detailed Description

The external air circuit, the air fire-extinguishing cannon and the use method thereof provided by the invention are described in detail below by combining the attached drawings and the specific embodiment. It is also to be noted that, in order to make the embodiments more detailed, the following embodiments are preferred and optimized, and other alternative implementations may be adopted by those skilled in the art; also, the drawings are only for purposes of more particularly describing embodiments and are not intended to limit the invention in any way.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

In general, terms may be understood at least in part from the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in the singular or may be used to describe a combination of features, structures, or characteristics in the plural, depending at least in part on the context. Additionally, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead allow for the presence of other factors not necessarily explicitly described, depending at least in part on the context.

It is understood that the meaning of "on 8230; \8230on", "on 82308230, 8230; \8230on" and "on 8230; \8230a top" in this disclosure should be interpreted in the broadest manner such that "on 8230; \8230on" means not only "directly on" something "but also on" something "with the meaning of intervening features or layers there between, and" on 8230; \8230on "or" on 8230, above "means not only the meaning of" on "or" above "something, but may also include the meaning of" on "or" above "something with no intervening features or layers there between.

Furthermore, spatially relative terms such as "below 8230; below," "lower," "above 8230; above," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature or features, as illustrated in the figures. Spatially relative terms are intended to encompass different orientations in use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.

The invention provides an external air passage which can quickly load air pressure to finish launching, has high fire extinguishing efficiency and a simple structure and can be produced in mass, a using method thereof, an air fire extinguishing gun and a using method thereof, and aims to solve the problems that the fire extinguishing gun in the prior art needs frequent maintenance, is difficult to quickly load air pressure, has low fire extinguishing efficiency, has a complex structure and high cost and cannot be produced in mass.

As shown in fig. 1 to 16, an embodiment of the present invention provides an external air circuit and an air fire-extinguishing gun, where the air fire-extinguishing gun and the external air circuit may be installed on fire-extinguishing facilities such as a fire-fighting robot or a fire truck, and the fire-extinguishing facilities such as the fire-fighting robot or the fire truck may adjust the pose state of the air fire-extinguishing gun for aiming and launching; fire extinguishing facilities such as fire-fighting robots or fire trucks are provided with relevant fire-fighting systems; the fire extinguishing bomb 7 can be loaded from the bomb loading port 12 of the air fire extinguishing cannon, dry powder is loaded in the fire extinguishing bomb 7 to extinguish fire in a dry powder dispersion mode, an acceleration sensor and a temperature sensor are arranged on a fuse of the fire extinguishing bomb 7, when the temperature of the fire extinguishing bomb 7 reaches a fire scene or the acceleration generated by impact exceeds a set value of the sensor, the fuse detonates a central burst pipe, and the fire extinguishing dry powder in the bomb body is fully dispersed by explosion of the central burst pipe to achieve the fire extinguishing effect.

Fire extinguishing bomb indicators may be used, the following are preferred, and the fire extinguishing bomb indicators of the present invention include, but are not limited to, the following data.

As shown in fig. 1, 5, and 16, an embodiment of the present invention provides an air-fire gun, including a gun body including a back barrel 1, a gun barrel 2, and an outer barrel 3; the inside of the rear barrel 1 is provided with a projectile feeding groove 11, the inside of the gun barrel 2 is provided with an inner bore 21, the rear barrel 1 is provided with a projectile loading port 12, the projectile loading port 12 is communicated with the projectile feeding groove 11, and a launching port 22 is arranged between the inner bore 21 and the projectile feeding groove 11; the connection mode between outer body pipe 3 and barrel 2 is the welding, and back body pipe 1 and outer body pipe 3 adopt flange joint's mode to connect, and the main effect of barrel is for supporting whole emitter and fixed corresponding emitter.

As shown in fig. 3 to 7, the outer barrel 3 is arranged outside the gun barrel 2 and the rear barrel 1, a space between the outer barrel 3 and the gun barrel 2 is a launching air chamber 31 and is provided with a launching air chamber air inlet 311, and the launching air chamber 31 is provided with a barometer 33; the space between the rear body tube 1 and the outer body tube 3 is a control air chamber 32, and is provided with a control air chamber air port 321; firing devices are arranged in the control air chamber 32 and the launching air chamber 31, each firing device comprises a spring 51 arranged in the control air chamber 32 and a piston 52 connected with the spring 51, and the spring 51 is used for resetting the piston 52 and enabling the initial position of the piston 52 to be in a normal position after launching is completed; the piston 52 controls the opening and closing of the transmission port 22.

The piston 52 is normally positioned on the launching air port 22, the width of the piston is larger than that of the launching air port 22, the piston 32 can block the launching air port 22 and separate the control air chamber 32 from the launching air chamber 31, and the normally positioned piston 52 can separate the two air chambers from the inner bore 21 to avoid communication between the two air chambers; the piston 52 can reciprocate along the outer wall of the rear barrel 1 in the control air chamber 32, the tail part of the gun barrel 2 is provided with a limiting plate 53, and the limiting plate 53 can block the piston 52 to prevent the piston from displacing towards the gun barrel 2.

The air fire extinguishing bomb in the prior art generally adopts two pressurization modes, namely pressurization is carried out after the fire extinguishing bomb is clamped in advance, and high-pressure gas is controlled by using a gas valve switch to push the fire extinguishing bomb to be launched, the former has high requirements on the strength of the fire extinguishing bomb and a clamping mechanism and needs frequent maintenance and repair of the clamping mechanism, the latter has high requirements on a gas valve, otherwise, the gun bore is difficult to be pressurized quickly in a short time.

As shown in fig. 7, a spring limiting groove 521 is formed at one end of the piston 52 connected to the spring 51, and a limiting plate fitting groove 522 is formed at the other end of the piston to achieve a better sealing effect, and a teflon sealing strip 523 is formed on a side surface of the piston 52 to prevent gas leakage.

As shown in fig. 8-16, the tail end of the back body tube 1 is provided with a spring pushing device, the spring pushing device comprises a motor 62, a screw 63 and a spring pushing plate 61, the back body tube 1 is provided with at least one notch 64, and the spring pushing plate 61 is connected with a screw nut 65 at the notch 64 through a bolt and is mounted on the screw 63; the motor 62 is provided with a gear reducer 66, a motor shaft is provided with a driving gear and a driven gear, the driven gear shaft is connected with the screw 63 through a coupler 67, and the driving gear drives the driven gear to rotate so as to enable the driven gear to have the same rotating speed.

The motor 62 provides power and drives the lead screw 63 to synchronously rotate through the driving gear and the driven gear, so that the lead screw nut 65 can drive the bullet pushing plate 61 to reciprocate in the bullet feeding groove 11 through the notch 64; the bullet pushing device is connected with the locking device 4 through the bullet pushing plate 61, the locking device 4 is arranged in the bullet feeding groove 11, and the bullet pushing device can push the locking device 4 to reciprocate in the bullet feeding groove 11.

As shown in fig. 1, two ends of the slot 64 are respectively provided with a first limit switch 641 and a second limit switch 642, the elastic pushing plate 61 is connected with the locking device 4 and moves from one end of the slot 64 to the other end, and when the screw nut 65 touches the second limit switch 642, the locking device 4 is locked; when the screw nut 65 touches the first limit switch 641, the elastic pushing device resets.

In this embodiment, it is preferable that the number of the lead screw 63 and the lead screw nut 65 is three, and the number of the notch 64 and the spring plate stopper groove 441 corresponds to that of the notch.

As shown in fig. 8-14, the locking device 4 is a core component of an air fire-extinguishing gun, and has the functions of closing the bore during firing, preventing high-pressure gas from leaking out, and bearing the pressure of the high-pressure gas during firing and recoil generated by firing. The locking device 4 and all parts thereof are made of materials with enough strength and toughness to ensure that the locking device 4 cannot be plastically deformed and broken due to impact generated in the locking and unlocking process of the locking device 4 and recoil generated by an extinguishing gun when the locking device is launched in an extreme state.

The locking device 4 comprises a locking core 43 and a locking device shell 44 which are connected with the push spring plate 61, the locking device shell 44 covers the locking core 43 and the push spring plate 61, at least one push spring plate limiting groove 441 is arranged on the locking device shell 44, the connecting end of the push spring plate 61 and the lead screw nut 65 extends out of the push spring plate limiting groove 441, and the push spring plate limiting groove 441 has a certain length space which can enable the extending end of the push spring plate 61 to slide in the push spring plate limiting groove 441. A sliding block guide rail 431 is arranged on the locking core 43, the sliding block locking column 42 is divided into two blocks, one end of each block slides on the sliding block guide rail 431, the other end of each block is inserted into a locking hole 442 on the locking device shell 44, and a return spring 421 is arranged on the sliding block locking column 42 and used for ensuring that the sliding block locking column 42 is constantly in contact with the sliding block guide rail 431 of the locking core 43; the end of the slider latch post 42 that is inserted into the latch bore 442 is provided with a micro-steel wheel 422 to reduce friction and wear between the slider latch post 42 and the latch housing 44 during sliding.

In the process that the push spring device pushes the locking device 4 to move, the slide block locking column 42 expands towards two sides under the action of the locking core 43 and pushes against the inner wall of the bullet feeding groove 11 to move, and the movement principle of the locking device 4 is that the push spring plate 61 and the locking core 43 push the slide block locking column 42 to move, and the slide block locking column 42 is inserted into the locking hole 442, so that the whole locking device 4 is indirectly driven to move.

One end of the back body pipe 1 close to the control air chamber 32 is provided with a bullet feeding groove limiting hole 41 which is matched with a sliding block locking column 42 of the locking device 4. When the locking device 4 is in a locking state, the sliding block locking column 42 is inserted into the bullet feeding groove limiting hole 41 to realize the clamping and fixing of the locking device 4 and the back body pipe 1, and most of recoil generated by the fire extinguishing bomb 7 is transmitted is borne by the sliding block locking column 42 when the fire extinguishing bomb 7 is transmitted, so that the damage of impact generated by the recoil to the motor 62 can be avoided, and the abrasion between the lead screw 63 and the lead screw nut 65 is reduced; the slider locking column 42 is tightly connected with the bullet feeding groove limiting hole 41 when being matched and reliably fixed, so that the automatic unlocking cannot be realized under the action of gas pressure during firing.

One end of the locking device shell 44 close to the gun barrel 2 is provided with a sealing plug fixing groove 451, and a sealing plug 45 is plugged in the sealing plug fixing groove 451; the sealing plug 45 is made of elastic materials, including but not limited to rubber, the distance from the sealing plug 45 to the axis of the locking hole 442 is larger than the distance from the tail of the fire extinguishing bomb 7 in the inner bore 21 to the projectile feeding groove limiting hole 41, namely when the locking device 4 completes locking action and the sliding block locking column 42 enters the projectile feeding groove limiting hole 41, the sealing plug 45 is in a stressed and compressed state and clings to the tail of the fire extinguishing bomb 7, so that the inner bore 21 achieves good sealing effect.

The locking device 4 is simple and reliable in structure, convenient to process and manufacture and capable of being produced in mass.

As shown in fig. 2, an external air path according to an embodiment of the present invention includes a high-pressure air source 801, where the high-pressure air source 801 may be a high-pressure air tank or an air pump, and since the electric power of the air fire-fighting gun is provided by a carrier, and the high-pressure air tank has the characteristics of high air pressure, small volume, easy replenishment after exhaustion, fast inflation, low power consumption, and the like, the launching air source of the air fire-fighting gun is preferably a high-pressure air tank.

The high-pressure air source 801 is respectively connected with the first air path 81 and the second air path 82; the gas path I81 is sequentially connected with a two-position two-way electromagnetic directional valve I811, a check valve I812, a pressure switch I813, a safety valve I814 and an electric ball valve 815, and the gas path I81 between the pressure switch I813 and the safety valve I814 and the electric ball valve 815 is also connected with a gas path III 83; the second air passage 82 is sequentially connected with a second two-position two-way electromagnetic directional valve 821, a second one-way valve 822, a second pressure switch 823 and a second safety valve 824 which are connected in parallel.

And the third air path 83 of the external air path is connected with the air port 321 of the control air chamber, and one end of the second air path 82 is connected with the air inlet 311 of the emission air chamber. The external air circuit provides high-pressure air for the air fire extinguishing gun so as to launch fire extinguishing bombs.

The two-position two-way electromagnetic directional valve I811, the pressure switch I813, the electric ball valve 815, the two-position two-way electromagnetic directional valve II 821 and the pressure switch II 823 in the external gas circuit are all electrically connected with a power supply facility and a controller, and the controller comprises but is not limited to a single chip microcomputer or a programmable logic controller.

The controller, the motor 62, the first limit switch 641 and the second limit switch 642 are electrically connected with a control end and a power supply facility, and the control end, the power supply facility and an external air circuit are arranged on a carrier of the air fire extinguishing gun, including but not limited to fire extinguishing facilities such as a fire-fighting robot or a fire engine.

As shown in fig. 17, an embodiment of the present invention provides a method for using an external air path, including the following steps:

s1, starting a launching preparation stage, electrifying and opening a first two-position two-way electromagnetic directional valve 811 by a control end control controller, enabling high-pressure gas to pass through the first two-position two-way electromagnetic directional valve 811 and a first one-way valve 812 on a first gas path 81 from a high-pressure gas source 801, enter a third gas path 83, and then enter the control gas chamber 32.

S2, when the air pressure value in the control air chamber 32 reaches the set air pressure value, triggering the first pressure switch 813, wherein the first pressure switch 813 enables the first two-position two-way electromagnetic directional valve 811 to be powered off and closed, and at the moment, the air pressure value in the control air chamber 32 is the set air pressure value.

And S3, when the two-position two-way electromagnetic directional valve I811 is closed in a power-off mode, the control end control controller enables the two-position two-way electromagnetic directional valve II 821 to be powered on and opened, and high-pressure gas enters the emission air chamber 31 from the high-pressure gas source 801 through the two-position two-way electromagnetic directional valve II 821 and the one-way valve II 822 in sequence.

And S4, when the air pressure value in the emission air chamber 31 reaches the set emission air pressure value, triggering the second pressure switch 823, and powering off and closing the second two-position two-way electromagnetic directional valve 821 through the second pressure switch 823, wherein the air pressure value in the emission air chamber 31 is the emission air pressure, and the emission preparation stage is ended.

The set air pressure value of the first safety valve 814 in the external air path is higher than that of the control air chamber 32, and when the air pressure in the first air path 81 exceeds the set air pressure value of the first safety valve 814, the first safety valve 814 opens to exhaust air to ensure the safety of the air path; the set air pressure value of the second safety valve 824 in the external air path is higher than the emission air pressure value, and when the air pressure in the second air path 82 exceeds the set air pressure value of the second safety valve 824, the second safety valve 824 opens to exhaust air to ensure the safety of the air path.

The set air pressure value of the control air chamber 32 is preferably equal to the transmitting air pressure value, and the set air pressure value is related to the area of the restriction plate 53, for example, when the area of the restriction plate 53 is large and the area of the piston where the gas acts on the transmitting air chamber 31 side is only 1/4 of the area of the piston where the gas acts on the control air chamber 32 side, the set air pressure value of the control air chamber 32 may be larger than 1/4 of the transmitting air pressure value.

When both air chambers reach the set air pressure value, because the limit plate 53 is arranged at one side of the piston 52 close to the emission air chamber 31, the area of the piston of the air acting at one side of the emission air chamber 31 is smaller than that of the piston of the air acting at one side of the control air chamber 32, at the moment, the piston 52 is still in the original position, and the emission air port 22 is in a closed state.

As shown in fig. 18, an embodiment of the present invention provides a method for operating an air fire-extinguishing gun, including the steps of:

s101, the initial positions of a projectile pushing device and a locking device 4 of the air fire-extinguishing gun are arranged at the tail end of a projectile feeding groove 11, a fire-extinguishing projectile 7 is loaded into the projectile feeding groove 11 from a loading port 12, the fire-extinguishing projectile 7 is located at the front end of the locking device, and then the projectile pushing device and the locking device 4 push the fire-extinguishing projectile 7 to move towards the direction of a gun barrel 2.

S102, after the loading is finished, the control end controls the motor 62 to be started, the motor 62 enables the screw rod 63 to rotate, and the ejector plate 61 drives the locking device 4 to push the fire extinguishing bomb 7 to move towards the inner bore 21 at the notch 64 of the bomb feeding groove 11 under the matching action of the screw rod 63 and the screw rod nut 65.

S1021, when the fire extinguishing bomb 7 is pushed by the bomb pushing plate 61 with the locking device 4 to move in the bomb feeding groove 11, the launching preparation stage begins, the control end control controller enables the two-position two-way electromagnetic directional valve I811 to be electrified and opened, and high-pressure gas enters the gas path III 83 from the high-pressure gas source 801 through the two-position two-way electromagnetic directional valve I811 and the check valve I812 on the gas path I81 and then enters the control gas chamber 32.

S1022, when the air pressure value in the control air chamber 32 reaches the set air pressure value, the first pressure switch 813 is triggered, the first two-position two-way electromagnetic directional valve 811 is powered off and closed by the first pressure switch 813, and the air pressure value in the control air chamber 32 is the set air pressure value at the moment.

And S1023, when the first two-position two-way electromagnetic directional valve 811 is closed in a power-off mode, the control end control controller enables the second two-position two-way electromagnetic directional valve 821 to be powered on and opened, and high-pressure gas enters the launching air chamber 31 from the high-pressure gas source 801 through the second two-position two-way electromagnetic directional valve 821 and the second one-way valve 822 in a sequential mode.

And S1024, when the air pressure value in the emission air chamber 31 reaches the set emission air pressure value, triggering the second pressure switch 823, and powering off and closing the second two-position two-way electromagnetic directional valve 821 through the second pressure switch 823, wherein the air pressure value in the emission air chamber 31 is the emission air pressure, and the emission preparation stage is ended.

S103, when the launching preparation stage is finished, the piston 52 is still in a normal position under the action of the spring 51, the second limit switch 642 is triggered at the end of the notch 64 in the movement of the screw nut 65 of the projectile pushing device, the second limit switch 642 transmits a signal to the control end, the control end controls the motor 62 to be closed, the locking hole 442 coincides with the projectile feeding groove limiting hole 41, the sliding block locking column 42 moves along the axial direction of the locking hole 442 under the action of the return spring 421 and the locking core 43 and is inserted into the projectile feeding groove limiting hole 41, the locking device 4 is fixed with the body barrel 1, the locking device 4 is in a locking position and in a locking state, the fire extinguishing projectile 7 is pushed into the inner bore 21, and the front ends of the inner bore 21 and the projectile feeding groove 11 are closed by the 45 of the locking device 4 to form a launching trajectory.

S104, when the locking device 4 is locked, the control end controls the electric ball valve 815 to be opened, gas in the control gas chamber 32 is exhausted through the electric ball valve 815, at the moment, the gas pressure in the control gas chamber 32 is obviously smaller than that in the launching gas chamber 31, high-pressure gas in the launching gas chamber 31 pushes the piston 52 to move towards the control gas chamber 32, the launching gas port 22 is opened, the gas pressure in the launching trajectory is rapidly increased, and the fire extinguishing bomb 7 is launched under the action of the high-pressure gas.

S105, after the fire extinguishing bomb 7 is launched, the control air chamber 32 and the launching air chamber 31 are exhausted, the piston 52 returns to the normal position under the action of the spring 51 to close the launching air port 22, the control end controls the motor 62 to start and rotate reversely, the bullet pushing plate 61 moves towards the tail end of the bullet sending groove 11 under the action of the motor 62 and the lead screw 63, the bullet pushing plate drives the locking core 43 to move, one end of the slider locking column 42 slides on the slider guide rail 431 of the locking core 43 to enable the slider locking column 42 to retract, the slider locking column 42 retracts to be separated from the bullet sending groove limiting hole 41 under the action of the locking core 43 and the return spring 421, the locking device 4 is unlocked, the bullet pushing plate 61 continues to move to the tail end of the bullet sending plate limiting groove 441, and the bullet pushing plate 61 hooks the bullet sending plate limiting groove 441, so that the whole locking device 4 moves towards the tail end of the bullet sending groove 11 along with the bullet pushing plate 61.

S106, when the screw nut 65 of the push-eject device moves to touch the first limit switch 641, the first limit switch 641 sends a signal to the control end, the control end controls the motor 62 to be turned off, at this time, the push-eject device and the locking device 4 return to the initial position, and the reset of the push-eject device is finished.

S107, after all the devices return to the initial positions, the next fire extinguishing bomb 7 is loaded, and the steps are repeated to finish the next emission.

Because the electric ball valve 815 has the characteristics of rapid opening and closing and flexible opening and closing, the air fire extinguishing gun adopts the electric ball valve 815 to control the firing device so as to ensure that the gas in the control air chamber 32 can be rapidly discharged, so that the fire extinguishing bomb 7 can be smoothly launched.

The air fire-extinguishing gun of the embodiment of the invention adopts a mode of pressurizing in the launching air chamber 31 in advance and utilizes the expansion wave of high-pressure gas to launch the projectile, the process of increasing the air pressure in the inner gun bore 21 from normal pressure to launching air pressure is relatively stable, the pressure on a recoil system of the air fire-extinguishing gun is relatively small, the bore pressure during launching is far less than the bore pressure of the gun, compared with the gun, a buffer device is removed, and the result is simpler.

The invention has the technical effects that the air fire-extinguishing cannon can realize various launching modes of vehicle-mounted launching, manual launching and robot launching, can adjust launching air pressure and range to realize long-distance fire extinguishing and ensure the safety of fire fighters, the firing device adopts the cooperation of the piston spring to avoid the problem that frequent maintenance and quick air pressure loading are difficult, and the invention controls the air cannon through electric control, has stronger maneuverability, improves the fire extinguishing efficiency, has simple structure, can realize mass production and has lower production cost.

The invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail as not to unnecessarily obscure aspects of the present invention.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims

1. An external gas circuit, its characterized in that includes:

the high-pressure gas source is respectively connected with the first gas circuit and the second gas circuit;

the gas circuit II is sequentially connected with a two-position two-way electromagnetic directional valve II, a check valve II, a pressure switch II and a safety valve II which are connected in parallel;

the two-position two-way electromagnetic directional valve I, the pressure switch I, the electric ball valve, the two-position two-way electromagnetic directional valve II and the pressure switch II are electrically connected with a power supply facility and a controller.

2. An air fire-extinguishing gun comprising the external air circuit according to claim 1,

the outer barrel is arranged outside the gun barrel and the rear barrel, and a space between the outer barrel and the gun barrel is a launching air chamber and is provided with a launching air chamber air inlet; the space between the rear body tube and the outer body tube is a control air chamber and is provided with a control air chamber air port;

one end of the back body pipe close to the control air chamber is provided with a bullet feeding groove limiting hole matched with a sliding block locking column of the locking device.

3. The air fire fighting cannon according to claim 2, wherein the projectile pushing device includes a motor, a lead screw and a projectile pushing plate, a notch is formed on the rear body tube, and the projectile pushing plate is connected with a lead screw nut at the notch through a bolt and is mounted on the lead screw;

4. The air fire fighting cannon according to claim 3, wherein both ends of the notch are respectively provided with a first limit switch and a second limit switch;

the push spring plate is connected with the locking device and moves from one end of the notch to the other end of the notch, when the lead screw nut touches the second limit switch, the locking device is locked, and when the lead screw nut touches the first limit switch, the push spring device resets.

5. The air fire fighting gun according to claim 2, wherein said spring is mounted in said control air chamber, and said piston is normally positioned on said firing air port so as to block said firing air port and space said control air chamber from said firing air chamber; and the transmitting air chamber is provided with an air pressure gauge.

6. The air cannon of claim 2, wherein the width of the piston is greater than the width of the firing port, one end of the piston connected with the spring is provided with a spring limiting groove, the other end of the piston is provided with a limiting plate fitting groove, and the side surface of the piston is provided with a sealing strip.

7. The air fire fighting gun according to claim 3, wherein said locking device includes a lock cylinder coupled to said pusher plate, a locking device housing covers the lock cylinder and the pusher plate, said locking device housing is provided with a pusher plate limiting groove, and said pusher plate and said lead screw nut coupling end protrude from said pusher plate limiting groove.

8. The air fire fighting cannon according to claim 7, wherein the locking cylinder is provided with a slider guide rail, one end of the slider locking cylinder slides on the slider guide rail, the other end of the slider locking cylinder is inserted into a locking hole in the locking device housing, the slider locking cylinder is provided with a return spring, and the end of the slider locking cylinder inserted into the locking hole is provided with a miniature steel wheel; and a sealing plug fixing groove is formed in one end, close to the gun barrel, of the locking device shell, and a sealing plug is plugged in the sealing plug fixing groove.

9. The air fire extinguisher according to claim 8, wherein the sealing plug is made of an elastic material, and a distance from the sealing plug to an axis of the locking hole is greater than a distance from a tail of the fire extinguishing bomb in the inner bore to the projectile feeding groove limiting hole.

10. The air fire fighting cannon of claim 2, wherein the controller, the motor, the first limit switch and the second limit switch are all electrically connected with a control end and a power supply facility.

11. A method of using an external pneumatic circuit, the method using the external pneumatic circuit of claim 1, the method comprising the steps of:

s1, starting a launching preparation stage, controlling a first two-position two-way electromagnetic directional valve to be electrified and opened by a control end, and enabling high-pressure gas to enter a third gas path through the first two-position two-way electromagnetic directional valve and a first one-way valve on the first gas path and then enter a control gas chamber;

and S4, when the air pressure value in the emission air chamber reaches a set emission air pressure value, triggering a second pressure switch, and enabling the second two-position two-way electromagnetic directional valve to be powered off and closed by the second pressure switch, wherein the air pressure value in the emission air chamber is the emission air pressure, and the emission preparation stage is finished.

12. The method as claimed in claim 11, wherein the first safety valve has a set air pressure value higher than that of the control air chamber, and the first safety valve opens to exhaust when the air pressure in the first air path exceeds the set air pressure value of the first safety valve;

13. A method of using an air fire-extinguishing gun using the external air circuit of claim 1, using an air fire-extinguishing gun according to any one of claims 2-10, and using the external air circuit of any one of claims 11-12, the method comprising the steps of:

s102, after the loading is finished, the control end controls the motor to be started, the motor enables the screw rod to rotate, the bullet pushing plate drives the locking device to push the fire extinguishing bomb to move towards the inner bore under the action of the screw rod, meanwhile, the control end controls the two-position two-way electromagnetic reversing valve to be powered on and opened, the launching preparation stage begins, and the steps from S1 to S4 occur in sequence;

s103, after the launching preparation stage is finished, the piston is still in a normal position under the action of the spring, the lead screw nut of the projectile pushing device triggers the second limit switch in motion, the control end controls the motor to be closed, the locking hole is overlapped with the projectile feeding groove limiting hole, the sliding block locking column is inserted into the projectile feeding groove limiting hole under the action of the reset spring and the locking cylinder, the locking device and the recoil pipe are fixed, the locking device is in a locking position, the fire extinguishing projectile is pushed into the inner bore, and the sealing plug of the locking device seals the inner bore and the front end of the projectile feeding groove to form a launching trajectory;

s104, when the locking device is locked, the control end controls the electric ball valve to be opened, gas in the control gas chamber is exhausted through the electric ball valve, at the moment, the pressure in the control gas chamber is obviously smaller than that in the launching gas chamber, the high-pressure gas in the launching gas chamber pushes the piston to move towards the direction of the control gas chamber, the launching gas port is opened, the pressure in the launching trajectory is rapidly increased, and the fire extinguishing bomb is launched under the action of the high-pressure gas;