CN219015109U

CN219015109U - External gas circuit and air fire-extinguishing gun

Info

Publication number: CN219015109U
Application number: CN202222822316.1U
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: 2023-05-12
Anticipated expiration: 2032-10-26

Abstract

The utility model provides an external gas circuit and an air fire-extinguishing gun, which comprises a bullet pushing device, a locking device, a firing device, an external gas circuit and a gun body, wherein the bullet pushing device pushes fire-extinguishing bullet to the gun bore locking device to lock the gun bore so as to seal the gun bore, the external gas circuit and the firing device enable the air pressure in two air chambers of the firing device to be unequal so that high-pressure air enters the gun bore to launch the fire-extinguishing bullet, and an external control end controls each device to reset for next launching after the launching is finished; the utility model can control the air fire gun to emit fire extinguishing bomb through air pressure by vehicle or robot, and can adjust the emission air pressure according to different sites and demands to change the range, thereby being applicable to remote fire fighting, leading firefighters to be far away from the fire scene and protecting the safety of firefighters.

Description

External gas circuit and air fire-extinguishing gun

Technical Field

The utility model relates to the technical field of fire-fighting equipment, in particular to an external gas circuit and an air fire-extinguishing gun.

Background

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 most frequent and most widespread disasters threatening public safety and social development. Traditional fire-fighting faucet and fire-extinguishing equipment are only suitable for close-range fire-extinguishing work, but are difficult to cope with fire-extinguishing work with complex terrain and high fire-extinguishing difficulty, high, far and dangerous works and the like. For example, if a fire occurs in a super high-rise building of 100 meters or more, fire extinguishing equipment such as fire-fighting trucks, scaling ladders, etc. cannot reach the firing floor at all because the floor is too high. The limitation of fire extinguishing equipment when a forest fire or a dangerous chemical plant breaks out a fire must place a life hazard into the fire scene during the fire extinguishing process, so that there is an urgent need for a fire extinguishing equipment for remote fire extinguishing with low cost and performance Gao Ke.

The fire gun is developed specifically for the characteristics that fire conditions are complex, and fire extinguishing personnel often cannot extinguish fire in a short distance. When a fire disaster occurs, fire extinguishing personnel or a fire extinguishing robot can carry fire extinguishing cannons to enter a fire extinguishing area, and under the unified command of on-site command personnel, fire extinguishing operation with long distance, high efficiency and safety is implemented by emitting fire extinguishing cannons to the fire extinguishing area, so that the purposes of rapidly extinguishing or inhibiting the fire disaster and avoiding casualties are achieved.

At present, three modes of electromagnetic emission, powder emission and pneumatic emission exist mainly, because the electromagnetic emission mode has extremely high cost, the danger degree of the powder filling mode is higher and is difficult to control, and the storage and transportation of fire works are strictly limited, most fire guns on the market adopt pneumatic emission, but the fire guns in the prior art also have some defects, such as conical plug type air guns, the structure of the fire guns is complex and difficult to produce in a large scale, such as double rupture membrane type air guns, the diaphragm replacement is time-consuming and the cost is increased when the fire guns work, such as a clamping bracket type air gun, the working principle of the fire gun needs to have certain strength, long-time use of the clamping bracket type air gun can cause serious clamping bracket abrasion to be required to be maintained frequently, such as the following tubular type air gun, and the working principle of the fire gun utilizes the control of a pneumatic valve switch to enable high-pressure gas to push the fire extinguishing bomb to emit, but the requirements on a pneumatic valve are extremely high, and otherwise the problem of difficult pneumatic quick loading easily occurs.

Disclosure of Invention

The embodiment of the utility model provides an external gas circuit and an air fire gun, which can adjust the emission pressure according to different sites and requirements to change the range so as to realize remote fire fighting, so that firefighters are far away from the fire site to protect the safety of the firefighters, 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 mass production can be realized.

In order to solve the above-mentioned purpose, the technical scheme provided by the embodiment of the utility model is as follows:

an external air circuit, comprising:

the high-pressure air source is connected with the first air passage and the second air passage respectively;

the first air passage is sequentially connected with a two-position two-way electromagnetic reversing valve I, a one-way valve I, a pressure switch I connected in parallel, a safety valve I and an electric ball valve, and the first air passage between the pressure switch I connected in parallel, the safety valve I and the electric ball valve is also connected with a third air passage;

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

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

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

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

an inner bore is arranged in the gun tube, and a transmitting air port is arranged 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 transmitting air chamber and is provided with an air inlet of the transmitting air chamber; 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;

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

the firing device comprises a spring and a piston connected with the spring, the piston can reciprocate along the outer wall of the rear barrel in the control air chamber, a limiting plate is arranged at the tail part of the gun barrel, and the limiting plate can prevent the piston from moving towards the gun barrel;

the tail end of the rear barrel is provided with a bullet pushing device which 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;

and a bullet feeding groove limiting hole is formed in one end of the rear body tube, which is close to the control air chamber, and is matched with the 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 through a bolt at the notch and is arranged on the screw rod;

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

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

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

the spring pushing 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 screw nut touches the limit switch II, the locking device is locked. When the screw nut touches the limit switch, the push spring device resets.

Preferably, the spring is mounted in the control air chamber, and the piston is positioned on the emission air port so as to block the emission air port and separate the control air chamber and the emission air chamber; and the emission air chamber is provided with an air pressure gauge.

Preferably, the width of the piston is larger than the width of the emission port, a spring limiting groove is formed in one end, connected with the spring, of the piston, a limiting plate engaging groove is formed in the other end, and a sealing strip is arranged on the side surface of the piston.

Preferably, the locking device comprises a locking cylinder connected with the push spring plate, a locking device shell covers the locking cylinder and the outside of the push spring plate, a push spring plate limiting groove is formed in the locking device shell, and the connecting end of the push spring plate and the screw nut extends out of the push spring plate limiting groove.

Preferably, a sliding block guide rail is arranged on the locking cylinder, one end of the sliding block locking column slides on the sliding block guide rail, the other end of the sliding block locking column is inserted into a locking hole on the locking device shell, a reset spring is arranged on the sliding block locking column, and a miniature steel wheel is arranged at the end part of one end of the sliding 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 limit hole of the bullet feeding groove.

Preferably, 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.

An external air circuit using method, which uses the external air circuit, comprises the following steps:

s1, starting an emission preparation stage, wherein the control end controls the first two-position two-way electromagnetic directional valve to be electrified and opened, and high-pressure gas sequentially passes through the first two-position two-way electromagnetic directional valve and the first one-way valve on the first gas path to enter the third gas path and then enter the control gas chamber;

s2, when the air pressure value in the control air chamber reaches a set air pressure value, triggering the first pressure switch, and switching off the first two-position two-way electromagnetic reversing valve by the first pressure switch, wherein the air pressure value in the control air chamber is the set air pressure value at the moment;

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

and S4, triggering the second pressure switch when the air pressure value in the emission air chamber reaches the set emission air pressure value, and closing the second two-position two-way electromagnetic directional valve by the second pressure switch in a power-off way, wherein the air pressure value in the emission air chamber is the emission air pressure at the moment, 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 is opened for exhausting;

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 for exhausting.

The method for using the external air circuit, the air fire-extinguishing gun and the external air circuit comprises the following steps:

s101, placing fire extinguishing bomb into the bullet feeding groove from the bullet loading opening at the initial positions of the bullet pushing device and the locking device of the air fire extinguishing gun so that the bullet pushing device and the locking device can push the fire extinguishing bomb to move towards the gun barrel;

s102, after loading is completed, the control end controls the motor to be started, the motor enables the screw rod to rotate, the bullet pushing plate pushes the fire extinguishing bullet to move towards the direction of 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 opened as soon as power is on, and the steps S1-S4 are sequentially carried out at the beginning of a launching preparation stage;

s103, ending a launching preparation stage, wherein the piston is still in a normal position under the action of the spring, the lead screw nut of the bullet pushing device triggers the limit switch II in movement, the control end controls the motor to be closed, the locking hole is overlapped with the bullet feeding groove limit hole, the sliding block locking column is inserted into the bullet feeding groove limit hole under the action of the reset spring and the locking core, the locking device is fixed with the rear barrel, the locking device is at a locking position, the fire extinguishing bullet is pushed into the inner bore, and the sealing plug of the locking device seals the inner bore and the front end of the bullet 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 discharged through the electric ball valve, the gas pressure in the control gas chamber is obviously smaller than that in the emission gas chamber, the high-pressure gas in the emission gas chamber pushes the piston to move towards the control gas chamber, the emission gas port is opened, the gas pressure in the emission trajectory is rapidly increased, and the fire extinguishing bomb is emitted under the action of the high-pressure gas;

s105, after the fire extinguishing bomb is completely launched, the control air chamber and the launching air chamber are exhausted, the piston returns to the normal position under the action of the spring to close the launching port, at the moment, the control end controls the motor to start and rotate reversely, at the moment, 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 locking core to move, one end of the sliding block locking column slides on the sliding block guide rail of the locking core to enable the sliding block locking column to retract, and when the sliding block locking column retracts to be separated from the bullet feeding groove limiting hole under the action of the locking core and the reset spring, the locking device is unlocked, at the moment, 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 so that the whole locking device moves 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 sends a signal to the control end, the control end controls the motor to be closed, at the moment, the bullet pushing device and the locking device return to the initial positions, and the bullet pushing device is reset;

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

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

according to the technical scheme, the external gas circuit and the air fire gun can realize various emission modes of vehicle-mounted emission, manual emission and robot emission, can adjust emission pressure and emission range to realize remote fire extinguishment and ensure the safety of firefighters, and the firing device adopts the piston spring to cooperate to avoid the problems of frequent maintenance and difficulty in quick loading of the pressure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a side cross-sectional view of one embodiment of an air fire-extinguishing gun of the present utility model;

FIG. 2 is a schematic diagram of an external air circuit of the present utility model;

FIG. 3 is a state diagram of the firing trajectory of an embodiment of the air fire gun of the present utility model prior to firing;

FIG. 4 is a diagram showing a ballistic state in the firing of an embodiment of the air fire gun of the present utility model;

FIG. 5 is an overall block diagram of one embodiment of an air fire-extinguishing gun of the present utility model;

FIG. 6 is a block diagram of a firing device of one embodiment of an air fire monitor of the present utility model;

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

FIG. 8 is a side cross-sectional view of a pusher and latch of one embodiment of an air fire monitor of the present utility model;

FIG. 9 is a top cross-sectional view of a pusher and latch of one embodiment of an air fire-extinguishing gun of the present utility model;

FIG. 10 is a schematic view showing an unlocked state of a locking device of an embodiment of the air fire gun of the present utility model;

FIG. 11 is a schematic diagram showing a locking state of a locking device of an embodiment of the air fire gun of the present utility model;

FIG. 12 is an exploded view of the latch of one embodiment of the air fire-extinguishing gun of the present utility model;

FIG. 13 is an assembly view of a latch of one embodiment of the air fire-extinguishing gun of the present utility model;

FIG. 14 is a schematic view showing the structure of a latch device of an embodiment of the air fire gun of the present utility model in a bullet feed slot;

FIG. 15 is a schematic view of a bullet-pushing device according to an embodiment of the air fire-extinguishing gun of the present utility model;

FIG. 16 is a schematic view of a barrel construction of an embodiment of an air fire-extinguishing gun of the present utility model;

FIG. 17 is a workflow diagram of a method of using an external air circuit of the present utility model;

fig. 18 is a flowchart of a method of using an embodiment of the air fire-extinguishing gun of the present utility model.

Wherein the reference numerals are as follows:

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

Detailed Description

The external air circuit and the air fire-extinguishing gun provided by the utility model are described in detail below with reference to the attached drawings and the specific embodiments. While the utility model has been described herein in terms of the preferred and preferred embodiments, the following embodiments are intended to be more illustrative, and may be implemented in many alternative ways as will occur to those of skill in the art; and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the utility model specifically.

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.

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

It will be understood that the meanings of "on … …", "over … …" and "over … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on" but also includes meaning "directly on" something with intervening features or layers therebetween, and "over … …" or "over … …" means not only "on" or "over" something, but also may include its meaning "on" or "over" something without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under …," "under …," "lower," "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 as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

Aiming at the problems that the fire extinguishing gun in the prior art needs frequent maintenance, has difficult air pressure quick loading, low fire extinguishing efficiency, complex structure and high cost, and cannot be produced in mass, the utility model provides the external air circuit and the air fire extinguishing gun which can quickly load air pressure to finish the emission, has high fire extinguishing efficiency, simple structure and can be produced in mass.

As shown in fig. 1 to 16, the embodiment of the utility model provides an external air circuit and an air fire gun, wherein the air fire gun and the external air circuit can be installed on fire extinguishing facilities such as a fire-fighting robot or a fire-fighting truck, and the fire extinguishing facilities such as the fire-fighting robot or the fire-fighting truck can adjust the pose state of the air fire gun to aim and launch; the fire-fighting robot, the fire-fighting truck and other fire-extinguishing facilities are provided with related fire-fighting systems; the fire extinguishing bomb 7 can be filled from the bomb filling port 12 of the air fire extinguishing gun, dry powder in the fire extinguishing bomb 7 is extinguished in a dry powder dispersion mode, the fuze of the fire extinguishing bomb 7 is provided with an acceleration sensor and a temperature sensor, 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 fuze detonates a central explosion tube, and the fire extinguishing dry powder in the bomb body is fully dispersed by the explosion of the central explosion tube, so that the fire extinguishing effect is achieved.

The fire extinguishing bomb can adopt the following indexes, which are only preferable, and the fire extinguishing bomb indexes of the utility model comprise, but are not limited to, the following data.

As shown in fig. 1, 5 and 16, the embodiment of the utility model provides an air fire-extinguishing gun, which comprises a gun body, wherein the gun body comprises a rear gun barrel 1, a gun barrel 2 and an outer gun barrel 3; the inside of the rear barrel 1 is provided with a bullet 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 bullet loading port 12, the bullet loading port 12 is communicated with the bullet feeding groove 11, and a transmitting air port 22 is arranged between the inner bore 21 and the bullet feeding groove 11; the connection mode between the outer barrel 3 and the gun barrel 2 is welding, the rear barrel 1 and the outer barrel 3 are connected in a flange connection mode, and the gun barrel mainly plays a role in supporting the whole launching device and fixing the corresponding launching device.

As shown in fig. 3 to 7, the outer barrel 3 is arranged outside the gun barrel 2 and the rear barrel 1, the space between the outer barrel 3 and the gun barrel 2 is a transmitting air chamber 31 and is provided with a transmitting air chamber air inlet 311, and an air pressure gauge 33 is arranged on the transmitting air chamber 31; the space between the rear barrel 1 and the outer barrel 3 is a control air chamber 32, and is provided with a control air chamber air port 321; the firing device is arranged in the control air chamber 32 and the emission air chamber 31 and comprises a spring 51 arranged in the control air chamber 32 and a piston 52 connected with the spring 51, and the spring 51 has the functions of resetting the piston 52 and keeping the initial position of the piston 52 at a normal position after the emission is completed; the piston 52 controls the opening and closing of the emission port 22.

The piston 52 is positioned on the emission port 22 normally, the width of the piston is larger than that of the emission port 22, the piston 32 can block the emission port 22 and separate the control air chamber 32 from the emission air chamber 31, and the piston 52 positioned normally 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 of the barrel 2 is provided with a limiting plate 53, and the limiting plate 53 can block the piston 52 to avoid displacement towards the barrel 2.

The air fire extinguishing bomb in the prior art generally adopts two pressurization modes, namely pre-locking the fire extinguishing bomb and then pressurizing and utilizing an air valve switch to control high-pressure gas to push the fire extinguishing bomb to be launched, wherein the former has high requirements on the strength of the fire extinguishing bomb and the locking mechanism and needs frequent maintenance and overhaul of the locking mechanism, the latter has extremely high requirements on the air valve, otherwise, the air fire extinguishing bomb is difficult to quickly pressurize in a gun bore in a short time, the firing device overcomes the problems of the two pressurization modes, the design of the spring 51 and the piston 52 does not need frequent maintenance, and the quick pressurization to the launching air pressure can be realized by utilizing the air pressure in the two air chambers to control the opening and closing of the launching air port 22 and the design of the external air channel and the two air chambers can realize the pre-pressurization.

As shown in fig. 7, a spring limit groove 521 is provided at one end of the piston 52 connected to the spring 51, a limit plate engaging groove 522 is provided at the other end, so as to achieve a better sealing effect, and a polytetrafluoroethylene sealing strip 523 is provided on a side surface of the piston 52 to prevent gas leakage.

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

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

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

The number of the screw rods 63 and the screw nuts 65 is preferably three in this embodiment, and the number of the notch 64 and the ejector plate limit groove 441 corresponds to the number.

As shown in fig. 8-14, the locking device 4 is a core component of the air fire-extinguishing gun, and is used for sealing the bore, preventing the high-pressure gas from leaking out and bearing the high-pressure gas pressure and the recoil generated by the firing during the firing process. The locking device 4 and the components thereof are made of materials with enough strength and toughness so as to ensure that the recoil force generated by the fire-extinguishing cannon can not cause the locking device 4 to generate plastic deformation and fracture when the locking device 4 is impacted and emitted in a limit state in the unlocking and locking process, and the locking device 4 and the components thereof also have enough rigidity so as to ensure that the deformation is small when the locking device 4 is impacted and is subjected to the recoil force generated by emission.

The locking device 4 comprises a locking core 43 and a locking device shell 44 which are connected with the push-up plate 61, the locking device shell 44 covers the outside of the locking core 43 and the push-up plate 61, at least one push-up plate limiting groove 441 is arranged on the locking device shell 44, the connecting end of the push-up plate 61 and the screw nut 65 extend out of the push-up plate limiting groove 441, and the push-up plate limiting groove 441 has a certain length space for enabling the extending end of the push-up plate 61 to slide in the push-up plate limiting groove 441. The lock cylinder 43 is provided with a slide guide rail 431, the slide block locking column 42 is divided into two blocks, one end of each block slides on the slide guide rail 431, the other end of each block is inserted into a locking hole 442 on the locking device shell 44, and the slide block locking column 42 is provided with a reset spring 421 for ensuring that the slide block locking column 42 is in contact with the slide guide rail 431 of the lock cylinder 43 at any time; the end of the slider latch post 42 inserted into the latch hole 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.

During the movement of the pusher pushing the latch 4, the slider latch post 42 expands to both sides and moves against the inner wall of the bullet feed slot 11 under the action of the latch core 43, and the movement principle of the latch 4 is that the pusher 61 and the latch core 43 push the slider latch post 42 to move, and the slider latch post 42 is inserted into the latch hole 442, so that the entire latch 4 is indirectly carried to move.

The end of the rear body tube 1 near 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 rear body tube 1, and most of recoil generated by the fire extinguishing bomb 7 is born by the sliding block locking column 42 when the fire extinguishing bomb 7 is launched, so that the damage of the motor 62 caused by the impact of the recoil can be avoided, and the abrasion between the screw rod 63 and the screw rod nut 65 is reduced; the slide block 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 under the action of gas pressure can not be ensured during firing.

A sealing plug fixing groove 451 is formed in one end, close to the gun barrel 2, of the locking device shell 44, and a sealing plug 45 is plugged into the sealing plug fixing groove 451; the sealing plug 45 is made of elastic materials, including but not limited to rubber, and 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 limit hole 41 of the bullet feeding groove, namely, when the locking device 4 completes the locking action and the sliding block locking column 42 enters the limit hole 41 of the bullet feeding groove, the sealing plug 45 is in a stressed compression state and is tightly attached to the tail of the fire extinguishing gun 7, so that the inner bore 21 achieves a good sealing effect.

The locking device 4 has simple and reliable structure, is convenient to process and manufacture and can be produced in mass.

As shown in fig. 2, the embodiment of the utility model provides an external air circuit, which comprises a high-pressure air source 801, wherein the high-pressure air source 801 can be a high-pressure air tank or an air pump, and the high-pressure air tank has the characteristics of high air pressure, small volume, easy replenishment after use, quick inflation, low power consumption and the like because the power of the air fire-extinguishing gun is provided by a carrier, so that the emission air source of the air fire-extinguishing gun is preferably a high-pressure air tank.

The high-pressure air source 801 is connected with the first air channel 81 and the second air channel 82 respectively; the first air passage 81 is sequentially connected with a two-position two-way electromagnetic directional valve 811, a one-way valve 812, a pressure switch 813 and a safety valve 814 which are connected in parallel, and an electric ball valve 815, and the first air passage 81 between the pressure switch 813 and the safety valve 814 which are connected in parallel and the electric ball valve 815 is also connected with a third air passage 83; the second gas circuit 82 is sequentially connected with a second two-position two-way electromagnetic reversing 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 a third air passage 83 of the external air passage is connected with the air port 321 of the control air chamber, and one end of a second air passage 82 is connected with the air inlet 311 of the emission air chamber. The external gas circuit provides high-pressure gas for the air fire extinguishing gun to launch fire extinguishing bomb.

The first two-position two-way electromagnetic directional valve 811, the first pressure switch 813, the electric ball valve 815, the second two-position two-way electromagnetic directional valve 821 and the second pressure switch 823 in the external air circuit are all electrically connected with a power supply facility and a controller, and the controller comprises but is not limited to a singlechip or a programmable logic controller.

The controller, the motor 62, the first 641 limit switch and the second 642 limit switch are all electrically connected with a control end and a power supply facility, and the control end, the power supply facility and the external gas 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-fighting truck.

As shown in fig. 17, the embodiment of the utility model provides a use method of an external air circuit, which comprises the following steps:

s1, starting a launching preparation stage, controlling a controller to electrify and open a two-position two-way electromagnetic directional valve one 811 by a control end, and enabling high-pressure gas to sequentially enter a gas channel three 83 from a high-pressure gas source 801 through the two-position two-way electromagnetic directional valve one 811 and a one-way valve one 812 on a gas channel one 81, and then enter the control air chamber 32.

S2, 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 pressure switch 813 enables the first 811 two-position two-way electromagnetic directional valve 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 first two-position two-way electromagnetic directional valve 811 is powered off and closed, the control end controls the controller to power on the second two-position two-way electromagnetic directional valve 821 and open, and high-pressure gas sequentially passes through the second two-position two-way electromagnetic directional valve 821 and the second one-way valve 822 from the high-pressure gas source 801 to enter the emission gas chamber 31.

And S4, when the air pressure value in the emission air chamber 31 reaches the set emission air pressure value, triggering a second pressure switch 823, and enabling the second two-position two-way electromagnetic directional valve 821 to be powered off and closed by 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 finished.

The set air pressure value of the safety valve I814 in the external air circuit is higher than the set air pressure value of the control air chamber 32, and when the air pressure in the air circuit I81 exceeds the set air pressure value of the safety valve I814, the safety valve I814 opens the exhaust to ensure the safety of the air circuit; the set air pressure value of the second safety valve 824 in the external air passage is higher than the emission air pressure value, and when the air pressure in the second air passage 82 exceeds the set air pressure value of the second safety valve 824, the second safety valve 824 opens the exhaust to ensure the safety of the air passage.

The set air pressure value of the control air chamber 32 is preferably equal to the emission air pressure value, and the set air pressure value is related to the area of the limiting plate 53, for example, when the area of the limiting plate 53 is large, and the piston area of the air acting on the side of the emission air chamber 31 is only 1/4 of the piston area of the air acting on the side of the control air chamber 32, the set air pressure value of the control air chamber 32 is only required to be greater than 1/4 of the emission air pressure value.

When both air chambers reach the set air pressure value, as the piston 52 is provided with the limiting plate 53 at the side close to the emission air chamber 31, the piston area of the air acting on the side of the emission air chamber 31 is smaller than the piston area of the air acting on the side of the control air chamber 32, and at this time, the piston 52 is still in the original position, and the emission air port 22 is in the closed state.

As shown in fig. 18, the embodiment of the utility model provides a working method of an air fire-extinguishing gun, which comprises the following steps:

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

And S102, after the loading is finished, the control end controls the motor 62 to be started, the motor 62 rotates the screw rod 63, and the screw rod 63 and the screw rod nut 65 cooperate to enable the bullet pushing plate 61 to drive the locking device 4 to push the fire extinguishing bullet 7 to move towards the direction of the inner bore 21 at the notch 64 of the bullet feeding groove 11.

S1021, when the bullet pushing plate 61 pushes the fire extinguishing bullet 7 to move in the bullet feeding groove 11 with the locking device 4, the control end controls the controller to electrify and open the two-position two-way electromagnetic directional valve one 811, and high-pressure gas sequentially passes through the two-position two-way electromagnetic directional valve one 811 and the one-way valve one 812 on the air channel one 81 from the high-pressure gas source 801, enters the air channel three 83 and then enters the control air chamber 32.

And S1022, when the air pressure value in the control air chamber 32 reaches the set air pressure value, triggering the first pressure switch 813, and enabling the first two-position two-way electromagnetic directional valve 811 to be powered off and closed by the first pressure switch 813, wherein the air pressure value in the control air chamber 32 is the set air pressure value.

S1023, when the first two-position two-way electromagnetic directional valve 811 is powered off and closed, the control end controls the controller to power on the second two-position two-way electromagnetic directional valve 821 and open, and high-pressure gas sequentially passes through the second two-position two-way electromagnetic directional valve 821 and the second one-way valve 822 from the high-pressure gas source 801 to enter the emission gas chamber 31.

And S1024, when the air pressure value in the emission air chamber 31 reaches the set emission air pressure value, triggering a second pressure switch 823, and enabling a second two-position two-way electromagnetic directional valve 821 to be powered off and closed by 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 finished.

And S103, when the preparation stage of the launching is finished, the piston 52 is still in a normal position under the action of the spring 51, the end part of the notch 64 of the feed screw nut 65 of the bullet pushing device triggers the limit switch II 642, the limit switch II 642 transmits a signal to the control end, the control end controls the motor 62 to be closed at the moment, the locking hole 442 coincides with the limit hole 41 of the bullet feeding groove, the sliding block locking column 42 moves along the axial direction of the locking hole 442 under the action of the reset spring 421 and the locking core 43 and is inserted into the limit hole 41 of the bullet feeding groove, the fixation of the locking device 4 and the rear barrel 1 is realized, the locking device 4 is at the locking position and is in the locking state at the moment, the fire extinguishing bullet 7 is pushed into the inner bore 21 at the moment, and the sealing plug 45 of the locking device 4 seals the front ends of the inner bore 21 and the bullet feeding groove 11 to form a launching trajectory.

And 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 discharged through the electric ball valve 815, at the moment, the gas pressure in the control gas chamber 32 is obviously smaller than the gas pressure in the emission gas chamber 31, the high-pressure gas in the emission gas chamber 31 pushes the piston 52 to move towards the control gas chamber 32, the emission gas port 22 is opened, the gas pressure in the emission trajectory is rapidly increased, and the fire extinguishing bomb 7 is emitted under the action of the high-pressure gas.

S105, after the fire extinguishing bomb 7 is completely 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 port 22, at the moment, the control end controls the motor 62 to start and rotate reversely, at the moment, the ejector plate 61 moves towards the tail end of the bullet feeding groove 11 under the action of the motor 62 and the screw 63, the ejector plate drives the locking core 43 to move, one end of the sliding block locking column 42 slides on the sliding block guide rail 431 of the locking core 43 to retract the sliding block locking column 42, and when the sliding block locking column 42 retracts to be separated from the bullet feeding groove limiting hole 41 under the action of the locking core 43 and the reset spring 421, the locking device 4 is unlocked, at the moment, the ejector plate 61 continues to move to the tail end of the ejector plate limiting groove 441, and the ejector plate 61 hooks the ejector plate limiting groove 441, so that the whole locking device 4 moves towards the tail end of the bullet feeding groove 11 along with the ejector plate 61.

And S106, when the screw nut 65 of the bullet pushing 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 closed, and at the moment, the bullet pushing device and the locking device 4 return to the initial positions, and the bullet pushing device is reset.

And S107, after all the devices return to the initial position, loading the next fire extinguishing bomb 7, repeating the steps, and completing the next firing.

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

The air fire-extinguishing gun of the embodiment of the utility model adopts the mode of pressurizing in the firing air chamber 31 in advance to utilize the expansion wave of the high-pressure air to fire the projectile, the process of raising the air pressure in the inner bore 21 from normal pressure to firing air pressure is stable, the pressure on the rear seat system of the air fire-extinguishing gun is smaller, the rifling pressure during firing is far smaller than that of the gun, and compared with the gun, a buffer device is removed, so that the result is simpler.

The utility model has the technical effects that the air fire-extinguishing gun can realize various emission modes of vehicle-mounted emission, manual emission and robot emission, can adjust the emission air pressure and the emission range to realize remote fire extinguishment and ensure the safety of firefighters, adopts the piston spring to cooperate, avoids the problems of frequent maintenance and difficult quick loading of air pressure, and has stronger maneuverability, improved fire-extinguishing efficiency and simple structure, and can realize mass production and lower production cost by controlling the air gun electronically.

The utility model is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the utility model. In the following description of preferred embodiments of the utility model, specific details are set forth in order to provide a thorough understanding of the utility model, and the utility model will be fully understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present utility model.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. An external air circuit, characterized by comprising:

2. An air fire-extinguishing gun, comprising an external air circuit as claimed in claim 1, characterized in that,

3. The air fire-extinguishing gun according to claim 2, wherein 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 through a bolt at the notch and is installed on the screw rod;

4. An air fire-extinguishing gun according to claim 3, wherein the two ends of the notch are respectively provided with a first limit switch and a second limit switch;

the spring pushing plate is connected with the locking device and moves from one end of the notch to the other end, when the screw nut touches the limit switch II, the locking device is locked, and when the screw nut touches the limit switch II, the spring pushing device is reset.

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

6. The air fire-extinguishing gun according to claim 2, wherein the width of the piston is larger than the width of the emission port, a spring limit groove is arranged at one end of the piston connected with the spring, a limit plate engaging groove is arranged at the other end of the piston, and a sealing strip is arranged on the side surface of the piston.

7. An air fire-extinguishing gun according to claim 3, wherein the locking device comprises a locking cylinder connected with the push-latch plate, a locking device shell covers the locking cylinder and the outside of the push-latch plate, a push-latch plate limiting groove is formed in the locking device shell, and the connecting end of the push-latch plate and the screw nut extends out of the push-latch plate limiting groove.

8. The air fire-extinguishing gun according to claim 7, wherein a slide block guide rail is arranged on the lock cylinder, 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 on the locking device shell, a reset spring is arranged on the slide block locking column, and a miniature steel wheel is arranged at one end part 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.

9. The air fire-extinguishing gun according to claim 8, wherein 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 bullet in the inner bore to the limit hole of the bullet feeding groove.

10. The air fire extinguishing gun of claim 4 wherein the controller, the motor, the first limit switch and the second limit switch are all electrically connected with a control terminal and a power supply facility.