CN217139059U - Special water jet equipment puts out a fire - Google Patents

Abstract

The utility model provides a special water spraying device for fire extinguishing, which comprises a carrier, a rotating frame and a water spraying gun, wherein four corners of the bottom surface of the carrier are provided with walking wheels, the middle part of the top surface is provided with a support, the rotating frame is rotatably connected with the top end of the support, and the water spraying gun is provided with a gun barrel and a spray head arranged at the head part of the gun barrel; the rotating frame is provided with a hanging lug with an L-shaped clamping groove, and the corner of the L-shaped clamping groove is of an arc transition structure; the gun barrel is rotationally connected with the L-shaped clamping groove through a pair of pin shafts arranged on the outer circumferential surface of the gun barrel. The utility model discloses the spray gun that sets up establishes on the microscope carrier with the spacing of self gravity and L type draw-in groove, can follow the spatial position of angle and position adjustment shower nozzle through barrel perpendicular luffing motion and horizontal plane left and right sides rotation to spraying water to put out a fire to different burning points, can greatly reduce fire fighter's physical demands, effectively avoid the fire fighter to receive the condition of injury because of both hands control spray gun left and right rocking pendulum and appear, improved the security of water spray operation.

Description

Special water jet equipment puts out a fire

Technical Field

The utility model relates to a fire control apparatus technical field, concretely relates to special water jet equipment puts out a fire.

Background

The fire-fighting lance is a water jetting tool for fire extinguishing, can jet dense and full water flow after being connected with a water hose, and has the advantages of long jetting range, large water quantity and the like. Fire water guns can be classified according to the different forms and characteristics of the jet flow: the water gun comprises a straight-flow water gun, a spraying water gun, a multi-purpose water gun and the like, wherein the commonly used water guns are the straight-flow water gun and the spraying water gun.

At present, current fire-fighting lance need the fireman to hold the rifle head on one hand, holds the stack on one hand when using it to put out a fire, utilizes two hand grips to control the squirt, owing to do not have better stress point, and fireman's physical demands is too big, perhaps makes the squirt through water pressure left and right rocking because of holding not jail, leads to the fireman to receive the injury. In addition, the water yield of the water gun can not be adjusted according to the area size and different distances of a fire source, so that water waste is easily caused, and the ideal fire extinguishing effect can not be achieved due to insufficient water in the later period.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to prior art not enough, the utility model provides a special water jet equipment puts out a fire to solve current fire-fighting lance and need handheld operation to lead to the too big and problem that receives the injury easily of fireman's physical demands when using.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a water spray device special for fire extinguishing comprises:

the four corners of the bottom surface of the carrying platform are provided with walking wheels, and the middle part of the top surface is provided with a supporting column;

the rotating frame is rotatably connected to the top end of the support column; and

the water spraying gun is provided with a gun barrel and a spray head arranged at the head part of the gun barrel;

the rotary frame is provided with a hanging lug with an L-shaped clamping groove, and the corner of the L-shaped clamping groove is of an arc transition structure; the gun barrel is rotatably connected with the L-shaped clamping groove through a pair of pin shafts arranged on the outer circumferential surface of the gun barrel.

Optionally, the bottom ends of a pair of the lugs are connected into a U-shaped structure through a transverse partition plate, and the bottom surface of the transverse partition plate is connected with a rotating shaft;

the rotating shaft is connected with the column barrel connected to the top end of the support column in a rotating mode.

Optionally, the fire hose winding device further comprises a hose winding wheel, wherein the hose winding wheel is rotatably connected with a hanging rod connected to the side surface of the strut and used for winding a fire hose.

Optionally, the two water hose disk wheels are symmetrically arranged and are respectively located on two sides of the strut.

Optionally, the spray head body is rotated and sealed and sleeved on the barrel head part; and

the spray head cover is rotatably sleeved on the gun barrel and fixedly connected with the spray head main body, and is used for limiting the spray head main body so as to prevent the spray head main body from axially moving;

the spray head main body is provided with a main spray pipe, a plurality of first auxiliary spray pipes and a plurality of second auxiliary spray pipes which are uniformly distributed around the circumference of the main spray pipe and are arranged in a crossed mode; the main nozzle is communicated with the gun barrel internal flow passage; the first auxiliary spraying pipe and the second auxiliary spraying pipe are different in pipe diameter and can be respectively communicated with the inner flow passage of the gun barrel when the spray head main body rotates.

Optionally, the head of the gun barrel is provided with a water outlet hole in the middle of the gun barrel and a plurality of arc water outlet grooves which are uniformly distributed around the circumference of the water outlet hole;

the spray head main body is internally provided with a main injection flow channel and a plurality of auxiliary injection flow channels which are uniformly distributed around the circumference of the main injection flow channel;

the main injection flow channel is communicated with the main injection pipe and corresponds to the water outlet hole;

the auxiliary injection flow channel is respectively communicated with the first auxiliary spray pipe and the second auxiliary spray pipe;

half quantity of the auxiliary injection flow channels correspond to the arc-shaped water outlet grooves, and the other half quantity of the auxiliary injection flow channels are staggered with the arc-shaped water outlet grooves.

Optionally, the auxiliary injection flow passage is respectively communicated with the first auxiliary injection pipe and the second auxiliary injection pipe through a necking nozzle.

Optionally, the outlets of the first and second secondary nozzles are each arranged obliquely to the outlets of the main nozzles in an outwardly diverging manner.

Optionally, the spray head further comprises a lock rod for locking the spray head cover, and the lock rod comprises a lock head, an arc-shaped block, a slide rod and a handle which are arranged in sequence;

the lock head can be inserted into a lock hole arranged at the side end of the sprayer cover, which is far away from the sprayer main body, and a plurality of lock holes are arranged and correspond to the auxiliary spraying flow passages one by one;

the arc-shaped block is in sliding fit with the outer circumferential surface of the gun barrel, and the sliding rod is in sliding connection with the support block arranged on the outer circumferential surface of the gun barrel.

Optionally, a spring is sleeved on the sliding rod, and two ends of the spring are respectively connected with the arc-shaped block and the supporting block in an abutting mode;

the lock rod and the spring form a locking mechanism.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the arranged water spraying gun is erected on the carrier by the self gravity and the limit of the L-shaped clamping groove, and the spatial position of the spray head can be adjusted from a plurality of angles and directions by the vertical swing of the vertical surface of the gun barrel and the left and right rotation of the horizontal surface, so that water spraying and fire extinguishing are carried out on different combustion points, the physical consumption of a fireman can be greatly reduced, the condition that the fireman is injured due to the fact that the water spraying gun is controlled by two hands to swing left and right is effectively avoided, and the safety of water spraying operation is improved;

2. the fire hose coiling wheel is beneficial to quickly spreading and retracting the fire hose on a fire scene, saves the carrying time of fire-fighting equipment and improves the fire-fighting efficiency;

3. according to the area size and different distances of the on-site fire source, the water flow is controlled to be sprayed out from the first auxiliary spray pipes or the second auxiliary spray pipes with different pipe diameters in a targeted manner through the rotation of the spray head main body, so that the water quantity is adjusted, and the fire extinguishing effect is improved;

4. by rotating the nozzle body, the arc-shaped water outlet groove can be communicated with the auxiliary spray flow channel corresponding to the first auxiliary spray pipe or the second auxiliary spray pipe, so that water flow is blocked from being sprayed out from the second auxiliary spray pipe or the first auxiliary spray pipe, and the adjustment and control of fire extinguishing water spray quantity are realized;

5. when water flow entering the auxiliary spraying flow channel passes through the necking spray hole, the water pressure and the flow rate are increased, the spraying distance is long, atomization can be realized when the water flow is sprayed out from the first auxiliary spraying pipe or the second auxiliary spraying pipe, the coverage area of the water flow or the spray can be enlarged, and the fire extinguishing effect is improved;

6. the outlets of the first auxiliary spray pipe and the second auxiliary spray pipe are obliquely arranged at the outlet of the main spray pipe in an outward diffusion mode, so that the coverage area of water flow or spray sprayed by each spray pipe can be enlarged, the fire extinguishing range is enlarged, the fire extinguishing effect is improved, and the physical consumption of fire fighters is reduced;

7. the locking rod locks the spray head cover to limit the spray head main body from spraying water on each spray pipe to rotate, so that continuous spraying of water flow during fire extinguishing is ensured, interruption is avoided, and the fire extinguishing effect is improved;

8. the locking lever passes through the restoring force locking sprinkler lid of spring, when the water spray volume of putting out a fire is adjusted to needs, through drawing earlier the unblock and the locking that the pine realized the sprinkler lid to realize the rotation and the fixing of shower nozzle main part, simple structure and convenient operation, the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a perspective view of a stage;

FIG. 3 is a schematic perspective view of the rotary frame;

FIG. 4 is a perspective view of the water spraying gun;

FIG. 5 is an enlarged view of a portion A of FIG. 4;

FIG. 6 is a schematic cross-sectional view of the assembled spray head body and barrel head;

FIG. 7 is a perspective view of the barrel head;

FIG. 8 is a schematic perspective view of the nozzle body;

FIG. 9 is a schematic perspective view of the cap;

fig. 10 is a perspective view of the lock lever.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-10, the utility model provides a special water jet equipment puts out a fire, include:

a carrier 600, wherein traveling wheels 610 are arranged at four corners of the bottom surface of the carrier, and a support 620 is arranged in the middle of the top surface;

the rotating frame 700 is rotatably connected to the top end of the supporting column 620; and

a water spraying gun having a gun barrel 100 and a nozzle arranged at the head of the gun barrel 100;

wherein, the rotating frame 700 is provided with a hanging lug 710 with a pair of L-shaped clamping grooves 711, and the corners of the L-shaped clamping grooves 711 are in arc transition structures; barrel 100 is rotatably coupled to L-shaped channel 711 by a pair of pins 140 disposed on its outer circumference.

Specifically, four traveling wheels 610 are provided at four corners of the bottom surface of the carrier 600, two of which are universal wheels and the other two of which are directional wheels. When the water spraying gun sprays water to extinguish a fire, the four walking wheels 610 can be locked, so that the standing and stopping of the carrier 600 are realized, the carrier 100 can be prevented from shaking, and the stability and the safety of the water spraying gun in the water spraying process are guaranteed.

During the use, carry platform 600 is pushed near the scene of a fire and is locked walking wheel 610 through walking wheel 610, the fire fighter is connected the barrel 100 afterbody through hosepipe (not shown in the figure) and fire hydrant or fire engine water tank, then pick up the spray gun and make round pin axle 140 aim at L type draw-in groove 711, and make round pin axle 140 slide in L type draw-in groove 711 and accomplish the screens through the action of spray gun self gravity, the U type handle 150 of barrel 100 rear end is held to fire fighter's one hand or both hands at last, through barrel 100 perpendicular luffing motion and swivel mount 700 rotate about the level at pillar 620 top end, adjust the spatial position of shower nozzle, thereby spout rivers to different combustion points and put out a fire. The water spraying gun is erected on the carrying platform 600 with the self gravity and the limiting of the L-shaped clamping groove 711, the spatial positions of the nozzles can be adjusted from multiple angles and directions through the vertical surface up-and-down swinging of the gun barrel 100 and the horizontal surface left-and-right rotating, so that water spraying and fire extinguishing are carried out on different combustion points, the physical consumption of firemen can be greatly reduced, the condition that the firemen are injured due to left-and-right swinging of the water spraying gun under the control of two hands is effectively avoided, and the safety of water spraying operation is improved.

Referring to fig. 3, the bottom ends of a pair of hanging lugs 710 are connected to form a u-shaped structure through a transverse partition 720, and the bottom surface of the transverse partition 720 is connected with a rotating shaft 730; the shaft 730 is rotatably coupled to a barrel 630 attached to the top end of the post 620.

The special water spraying device for fire extinguishing further comprises a hose coil wheel 800, and the hose coil wheel 800 is rotatably connected with a hanging rod 640 connected to the side surface of the pillar 620 and used for winding a fire hose. Specifically, when the fire hose needs to be used, one end of the fire hose wound around the hose reel 800 is directly pulled to be spread, and when the fire hose needs to be put away after the fire hose is used, the hand lever 810 of the hose reel 800 is held by hand to rotate the hose reel 800, so that the fire hose can be wound around the hose reel 800 again. Through the hosepipe dish wheel 800 that sets up, be favorable to the scene of fire hose to spread fast and pack up, save fire-fighting equipment transport time, improve fire extinguishing efficiency. In this embodiment, two water hose reel wheels 800 are symmetrically arranged and are respectively located at two sides of the pillar 620.

The above-mentioned shower nozzle includes:

a nozzle body 200 rotatably and hermetically sealed to the head of the barrel 100; and

the nozzle cover 300 is rotatably sleeved on the barrel 100 and fixedly connected with the nozzle body 200, and is used for limiting the nozzle body 200 to prevent the nozzle body from axially moving;

the nozzle body 200 is provided with a main nozzle 210, and a plurality of first auxiliary nozzles 220 and second auxiliary nozzles 230 which are uniformly distributed around the circumference of the main nozzle 210 and are arranged in a crossed manner; the main nozzle 210 communicates with the internal flow passage of the barrel 100; the first secondary nozzle 220 and the second secondary nozzle 230 have different diameters, and they are respectively communicated with the inner flow passage of the barrel 100 when the spray head body 200 rotates (i.e., they do not spray water at the same time).

Specifically, the nozzle body 200 is rotatably sleeved on the head of the barrel 100 and sealed by an O-ring; the spray head cover 300 is shaped like a shaft end retainer ring, is fixedly connected with the end surface of the spray head main body 200 through a screw, is in sliding fit with the side surface of the head part of the gun barrel 100, and rotates together with the spray head main body 200 so as to limit the axial movement of the spray head main body 200 when rotating; for ease of assembly and disassembly, the cap 300 is assembled from a pair of semi-circular caps, which is a common technique in the art and is not specifically limited herein, and thus the cap 300 shown in fig. 9 is again shown as a circular cap. In use, water flows through the inner flow passage of the gun barrel 100 and is sprayed out of the main nozzle 210 and the first auxiliary nozzle 220 or the main nozzle 210 and the second auxiliary nozzle 230 respectively, so as to extinguish fire; in a fire scene, a fire fighter rotates the nozzle body 200 by a certain angle according to the size of a fire and the distance from a fire source, and switches the communication state of the first and second auxiliary nozzles 220 and 230 with the internal flow passage of the barrel 100 while keeping the main nozzle 210 to continuously spray water, thereby adjusting and controlling the amount of water sprayed for fire extinguishing. That is, according to the area size and different distances of the on-site fire source, the water flow is controlled to be sprayed out from the first auxiliary spraying pipe 220 or the second auxiliary spraying pipe 230 with different pipe diameters in a targeted manner through the rotation of the nozzle body 200, so that the water quantity is adjusted, and the fire extinguishing effect is improved.

Referring to fig. 7, the head of the barrel 100 is provided with a water outlet hole 110 in the middle and a plurality of arc-shaped water outlet grooves 120 uniformly distributed around the circumference of the water outlet hole 110; referring to fig. 8, the head body 200 is provided therein with a main injection flow passage 240 and a plurality of sub injection flow passages 250 uniformly distributed around the circumference of the main injection flow passage 240; referring to fig. 6, the main injection flow passage 240 communicates with the main nozzle 210 and corresponds to the water outlet hole 110; the auxiliary injection flow passage 250 is respectively communicated with the first auxiliary nozzle 220 and the second auxiliary nozzle 230; half of the number of secondary injection channels 250 correspond to the arcuate exit channels 120, and the other half of the number of secondary injection channels 250 are offset from the arcuate exit channels 120. A part of water flow in the internal flow passage of the gun barrel 100 sequentially passes through the water outlet hole 110, the main injection flow passage 240 and the main nozzle 210 to be sprayed out, and the other part of water flow passes through the arc-shaped water outlet groove 120 to enter the corresponding auxiliary injection flow passage 250 to be sprayed out from the first auxiliary nozzle 220 or the second auxiliary nozzle 230, and by rotating the nozzle body 200, the arc-shaped water outlet groove 120 can be communicated with the auxiliary injection flow passage 250 corresponding to the first auxiliary nozzle 220 or the second auxiliary nozzle 230, so that the water flow is blocked from being sprayed out from the second auxiliary nozzle 230 or the first auxiliary nozzle 220, and the adjustment and control of the fire extinguishing water spraying amount are realized.

The auxiliary injection channel 250 is respectively communicated with the first auxiliary nozzle 220 and the second auxiliary nozzle 230 through a necking nozzle (i.e. the inner diameter of the auxiliary injection channel 250 is respectively larger than the pipe diameters of the first auxiliary nozzle 220 and the second auxiliary nozzle 230). When the rivers that get into vice injection flow 250 pass through the throat orifice, water pressure and velocity of flow all grow, and jet distance is far away, can realize atomizing when spouting from first vice spray tube 220 or the vice spray tube 230 of second moreover, can enlarge the area covered of rivers or spraying, improves fire extinguishing effect.

In order to further enlarge the coverage area of the water flow or spray, the outlets of the first and second sub-nozzles 220 and 230 are disposed obliquely to the outlets of the main nozzles 210 in an outwardly diverging manner. So, the area covered of rivers or the spraying that each spray tube erupted will further obtain enlarging, increases the scope of putting out a fire, improves fire control effect, reduces fire fighter's physical demands.

The sprayer also comprises a lock rod 500 for locking the sprayer cover 300, wherein the lock rod 500 comprises a lock head 510, an arc-shaped block 520, a slide rod 530 and a handle 540 which are arranged in sequence; the locking head 510 may be inserted into a locking hole 310 provided at a side end of the head cap 300 facing away from the head main body 200, and a plurality of locking holes 310 are provided and correspond to the sub injection flow passages 250 one to one; the arc blocks 520 are slidably engaged with the outer circumferential surface of the barrel 100, and the sliding rods 530 are slidably coupled with the support blocks 130 disposed on the outer circumferential surface of the barrel 100. Rotating shower nozzle main part 200 and driving shower nozzle lid 300 and rotating certain angle, make lockhole 310 and tapered end 510 aim at, rivers just spout from first pair of spray tube 220 or the vice spray tube 230 of second this moment, promote locking lever 500 through handle 540, the laminating of arc piece 520 can guarantee locking lever 500 even movement in the outer periphery slip of barrel 100, make tapered end 510 insert lockhole 310 accurately, thereby locking shower nozzle lid 300 takes place to rotate in order to restrict shower nozzle main part 200 at each spray tube water spray, guarantee the continuous blowout of rivers when putting out a fire, can not take place to interrupt, and then improve fire extinguishing effect.

The sliding rod 530 is sleeved with a spring 400, and two ends of the spring 400 are respectively connected with the arc-shaped block 520 and the supporting block 130 in an abutting mode; the lock lever 500 and the spring 400 constitute a locking mechanism. Locking lever 500 passes through the power that resets of spring 400 and locks shower nozzle lid 300 promptly, when the water spray volume of putting out a fire needs to be adjusted, realizes the unblock and the locking of shower nozzle lid 300 through drawing earlier the pine afterwards to realize the rotation and the fixing of shower nozzle main part 200, simple structure and convenient operation, the practicality is strong.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (10)

1. The utility model provides a special water jet equipment puts out a fire which characterized in that includes:

the four corners of the bottom surface of the carrying platform are provided with walking wheels, and the middle part of the top surface is provided with a supporting column;

the rotating frame is rotatably connected to the top end of the support column; and

the water spraying gun is provided with a gun barrel and a spray head arranged at the head part of the gun barrel;

the rotary frame is provided with a hanging lug with an L-shaped clamping groove, and the corner of the L-shaped clamping groove is of an arc transition structure; the gun barrel is rotatably connected with the L-shaped clamping groove through a pair of pin shafts arranged on the outer circumferential surface of the gun barrel.

2. The water spray device special for fire extinguishing according to claim 1, wherein:

the bottom ends of the hanging lugs are connected into a U-shaped structure through transverse partition plates, and the bottom surfaces of the transverse partition plates are connected with rotating shafts;

the rotating shaft is connected with the column barrel connected to the top end of the support column in a rotating mode.

3. The water spray device special for fire extinguishing according to claim 1 or 2, further comprising a hose reel wheel rotatably connected with a hanger rod connected to the side of the pillar for winding a fire hose.

4. The water spraying device special for fire extinguishing according to claim 3, wherein the number of the water hose disk wheels is two, and the two water hose disk wheels are respectively arranged on two sides of the support.

5. The water spray apparatus special for fire extinguishing according to claim 1, wherein the spray head comprises:

the spray head main body rotates and is arranged at the head part of the gun barrel in a sealing manner; and

the spray head cover is rotatably sleeved on the gun barrel and fixedly connected with the spray head main body, and is used for limiting the spray head main body so as to prevent the spray head main body from axially moving;

the spray head main body is provided with a main spray pipe, a plurality of first auxiliary spray pipes and a plurality of second auxiliary spray pipes which are uniformly distributed around the circumference of the main spray pipe and are arranged in a crossed mode; the main nozzle is communicated with the gun barrel internal flow passage; the first auxiliary spraying pipe and the second auxiliary spraying pipe are different in pipe diameter and can be respectively communicated with the inner flow passage of the gun barrel when the spray head main body rotates.

6. The water spray device special for fire extinguishing according to claim 5, wherein:

the head of the gun barrel is provided with a water outlet hole positioned in the middle of the gun barrel and a plurality of arc water outlet grooves uniformly distributed around the circumference of the water outlet hole;

the spray head main body is internally provided with a main injection flow channel and a plurality of auxiliary injection flow channels which are uniformly distributed around the circumference of the main injection flow channel;

the main injection flow channel is communicated with the main injection pipe and corresponds to the water outlet hole;

the auxiliary injection flow channel is respectively communicated with the first auxiliary spray pipe and the second auxiliary spray pipe;

half quantity of the auxiliary injection flow channels correspond to the arc-shaped water outlet grooves, and the other half quantity of the auxiliary injection flow channels are staggered with the arc-shaped water outlet grooves.

7. The water spraying device special for fire extinguishing according to claim 6, wherein the secondary spraying flow passage is communicated with the first secondary spraying pipe and the second secondary spraying pipe through a necking spray hole respectively.

8. The water spray device special for fire extinguishing according to any one of claims 5 to 7, wherein the outlets of the first and second secondary nozzles are each disposed obliquely to the outlet of the main nozzle in an outwardly diverging manner.

9. The water spray device special for fire extinguishing according to claim 6 or 7, wherein:

the sprayer also comprises a lock rod for locking the sprayer cover, and the lock rod comprises a lock head, an arc-shaped block, a slide rod and a handle which are arranged in sequence;

the lock head can be inserted into a lock hole arranged at the side end of the sprayer cover, which is far away from the sprayer main body, and a plurality of lock holes are arranged and correspond to the auxiliary spraying flow passages one by one;

the arc-shaped block is in sliding fit with the outer circumferential surface of the gun barrel, and the sliding rod is in sliding connection with the support block arranged on the outer circumferential surface of the gun barrel.

10. The water spray device special for fire extinguishing according to claim 9, wherein:

the sliding rod is sleeved with a spring, and two ends of the spring are respectively connected with the arc-shaped block and the support block in an abutting mode;

the lock rod and the spring form a locking mechanism.

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