CN108031043B

CN108031043B - Zero recoil fire-fighting lance

Info

Publication number: CN108031043B
Application number: CN201810024188.1A
Authority: CN
Inventors: 马腾飞; 韩雪光; 王增君; 张佰龙; 王荣; 谌廷超
Original assignee: Haining City Wanlida Extinguisher Co ltd
Current assignee: Zhejiang Wanlida Fire Equipment Co ltd
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2022-10-21
Anticipated expiration: 2038-01-10
Also published as: CN108031043A

Abstract

The invention discloses a zero-recoil fire-fighting lance, which relates to the field of fire fighting and comprises a body, a water outlet assembly connected to the front end of the body and a water inlet assembly connected to the rear end of the body, wherein a sealing ball which is used for communicating or closing the water inlet assembly and the water outlet assembly and is provided with a through opening in a penetrating manner is arranged in the body, the outer wall of the body is rotatably connected with a switch handle driving the sealing ball to rotate, the body is provided with an inwards-concave and arc-shaped limiting groove, the switch handle is connected with a limiting block embedded in the limiting groove, the rotating center of the switch handle and the rotating center of the sealing ball are concentrically arranged, and the angle formed by connecting lines between two ends of a diameter of the through opening and the center of the sealing ball is the same as the angle formed by connecting lines between two ends of the limiting groove and the center of the sealing ball. The zero-recoil fire-fighting lance can quickly and accurately realize the opening or closing of the sealing ball in the using process and reduce the recoil in the spraying process.

Description

Zero recoil fire-fighting lance

Technical Field

The invention relates to the field of fire fighting, in particular to a zero recoil fire-fighting lance.

Background

The zero recoil fire-fighting lance is a water jetting tool for fire extinguishment, can jet dense and full water flow by connecting the zero recoil fire-fighting lance with a water belt, and has the advantages of long jetting range, large water quantity and the like.

Chinese patent publication No. CN203724677U discloses a novel multifunctional zero recoil fire-fighting lance, including fire-fighting interface, switching port, front seal seat, rear seal seat, seal ball, body, rectifier, regulation inner tube, turning block and switch, but this switch is established at the rear end of this body with front and back pivoted mode cover, is equipped with above-mentioned turning block on the left and right sides of this switch respectively, and the first end of turning block is fixed in the switch, and the lateral wall that the second end passed the body links together with the seal ball.

Above-mentioned technical scheme is in the use, and the rotary switch drives the ball sealer by the switch through the turning block and rotates, and then realizes the intercommunication or the closing of fire control interface and rectifier, but when the user rotates the switch, rotates too big or the undersize angle with the switch easily and leads to discharge to reduce, reduces performance.

Disclosure of Invention

The invention aims to provide a zero-recoil fire-fighting lance, which can quickly and accurately realize the opening or closing of a sealing ball in the using process.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a zero recoil fire-fighting lance, includes the body, connects in the delivery element of body front end, connects in the subassembly of intaking of body rear end, this internal being provided with is used for intercommunication or closes the delivery element and runs through the ball sealer that has the through-going mouth, the body outer wall rotates and is connected with drive ball sealer pivoted switch lever, the body is seted up inwards sunken and is curved spacing groove, switch lever is connected with and inlays the stopper of locating the spacing inslot, switch lever's center of rotation is concentric setting with the center of rotation of ball sealer, states the through-going mouth wherein the angle that the line between a diameter both ends and the ball sealer center constitutes is the same with the angle that the line between the spacing groove both ends and the ball sealer center constitutes.

By adopting the technical scheme, in the using process, the switch handle is rotated, the limiting block on the switch handle is driven to move in the limiting groove, the arc length of an arc line formed by the rotating center of the sealing ball passing opening serving as the circle center is equal to the arc length of the limiting groove, when the switch handle is rotated and the limiting block is driven to move from one end of the limiting groove to the other end, the sealing ball is driven to just rotate for a certain angle, so that the maximum water inlet area between the passing opening of the sealing ball and the water inlet assembly is achieved, the phenomenon that the rotating angle of the switch handle is too large when the switch handle is rotated due to no limiting can be limited, a part of the passing opening cannot be fully utilized, the water flow is reduced, the injection effect is reduced, and due to the limiting of the limiting groove, the rotating angle of the switch handle can be determined when the switch handle is rotated, so that any user can achieve the best effect when in use; and the limiting groove is inwards sunken on the body, so that the weight of the body can be reduced, and the labor intensity in the use process is reduced.

The invention is further configured to: the diapire of spacing groove is provided with a plurality of position grooves along its radian, stopper tip roll connection has the location pearl that can inlay and locate the position inslot, the stopper slides along its length direction and connects in switch handle, the stopper deviates from and is connected with the tight spring in top between location pearl one end and the switch handle.

Through adopting above-mentioned technical scheme, when the switch handle rotated to a certain position, can promote stopper and location pearl under the effect of the tight spring in top and inlay and locate corresponding some position inslot to play limiting displacement to the position of switch handle, make switch handle can stop in a certain position, and then avoid the switch handle when no external force grips, and take place corresponding rotation, make the injection process can be more stable.

The invention is further configured to: the water inlet assembly comprises an installation sleeve which is connected to the rear end of the body in a sealing mode, a switching sleeve which is connected to the rear end of the installation sleeve in a rotating mode, and a fire-fighting interface which is connected to the rear end of the switching sleeve in a threaded mode, wherein the installation sleeve is close to the outer wall of the rear end and the inner wall of the switching sleeve, which is close to the front end, is provided with an inwards-concave ball groove, balls are in rolling fit in the ball groove, a ball filling port which is communicated with the ball groove is formed in the switching sleeve, and a plugging bolt is matched with the inner thread of the ball filling port.

Through adopting above-mentioned technical scheme, when connecting with outside fire water pipe, need and the fire water pipe between produce a relative rotation and just can realize connecting between them, thereby can conveniently realize the erection joint through rotatable switching cover, and can adjust the injection angle of play water according to actual need in the use, because the weight after the fire water pipe is inside to fill water is heavier, so be difficult to the pulling, then can rely on rotatable body to realize adjusting the play water angle of injection this moment, reach better injection effect.

The invention is further configured to: the water outlet assembly comprises an adjusting pipe hermetically connected to the front end of the body, a flow adjusting mechanism connected to the adjusting pipe and a flow state adjusting mechanism connected to the adjusting pipe; the flow regulation mechanism comprises a center post, a rectifier and a regulating ring, wherein one end of the center post is hermetically connected between the body and the regulating pipe, the other end of the center post extends along the central axis of the body, the rectifier is slidably matched with the inner wall of the regulating pipe along the central axis of the body, the regulating ring is rotatably connected to the outer wall of the regulating pipe and drives the rectifier to move, an inclined water outlet gap is formed between the front end of the center post and the inner wall of the front end of the rectifier, a spiral regulating groove is formed in the outer wall of the rectifier, and the regulating ring is connected with a contact block which penetrates through the regulating pipe and is abutted to the side wall of the regulating groove.

Through adopting above-mentioned technical scheme, when rotating the adjustable ring, conflict piece on the adjustable ring will play conflict promotion effect to the lateral wall of adjustment tank because the adjustment tank is spiral setting to when rotating the adjustable ring, just can realize the back-and-forth movement of rectifier, and then can change the size in the play water clearance between rectifier tip and the center post tip, thereby change the size of water flow.

The invention is further configured to: the adjusting groove lateral wall is equipped with a plurality of arc recesses along its helical direction, it is equipped with the elastic ring to support touch piece bottom cover, the elastic ring is supported in the adjusting groove lateral wall and can inlay and locate in the arc recess.

Through adopting above-mentioned technical scheme, when rotating the adjustable ring, the elastic ring on the conflict piece can inlay and locate corresponding arc recess in to play certain limiting displacement to the position of adjusting ring, make the adjustable ring be difficult to take place to rotate under the condition of no external force, make the adjustable ring remain stable, just also kept the stability in water clearance, thereby sprayed appointed position.

The invention is further configured to: the outer portion, close to the front end, of the rectifier is sleeved with an adjusting spring, one end of the adjusting spring is connected to the front end of the rectifier, and the other end of the adjusting spring is connected to the front end of the adjusting tube.

By adopting the technical scheme, when the water outlet gap is formed between the front end of the rectifier and the front end of the central column, the adjusting spring is in a compressed state, and the adjusting spring applies forward thrust to the rectifier at the moment, so that part of the acting force of water flow passing through the water outlet gap can be counteracted, the rectifier is prevented from being pushed to move due to the pressure of the water flow, and the stability of the water outlet gap can be kept after the adjustment is finished; and when the water outlet gap needs to be reduced, because the adjusting spring applies forward thrust to the rectifier, the acting force when the adjusting ring is rotated can be reduced, and the difficulty in the adjusting process is reduced.

The invention is further configured to: the rectifier inner wall is provided with at least two guide grooves which are parallel to the central axial direction of the rectifier and are uniformly arranged along the circumferential direction of the rectifier, and the central column outer wall is integrally formed with a supporting block which is embedded in the guide grooves.

Through adopting above-mentioned technical scheme, the supporting shoe can play the supporting role to the longer center post of length, and then makes the center post remain stable, and simultaneously, the supporting shoe inlays and locates the spacing inslot to play limiting displacement to the removal of rectifier, avoid the adjustable ring to drive the rectifier and remove and cause the rotation of rectifier often, make the rectifier can be along the central axial displacement of center post.

The invention is further configured to: flow state adjustment mechanism includes that threaded connection is nozzle overcoat, the integrated into one piece adapter sleeve in nozzle overcoat rear end that horn mouth form in adjusting tube outer wall and front end, the outside joint of adapter sleeve rear end has circular spring, the through-hole has been seted up to the adapter sleeve, the through-hole embeds there is the ball, a plurality of pearl grooves of putting have been seted up along its circumferencial direction to the adjusting tube outer wall, the ball is arranged circular spring in and is put between the pearl groove.

By adopting the technical scheme, when the nozzle outer sleeve is rotated, the nozzle outer sleeve can axially move along the center of the center column, so that the spraying direction of water flow is changed, the sprayed flow state is adjusted, the water flow is more concentrated or dispersed, meanwhile, in the rotating process, the round ball is tightly held due to the fact that the round spring is coated on the connecting sleeve, the round ball can be tightly held in the ball containing groove, and therefore when the nozzle outer sleeve is rotated, the round ball can make a sound when moving from one of the ball containing grooves to the other ball containing groove, and better adjusting experience is achieved; simultaneously, the circular spring can improve the stability of the nozzle jacket at a certain position under the action of holding the ball tightly, and the influence on the spraying effect caused by the automatic rotation of the nozzle jacket due to the impact force of water flow is avoided.

In conclusion, the invention has the following beneficial effects:

one is as follows: through the action of the limiting block and the limiting groove on the switch handle, when the limiting block abuts against the end part of the limiting groove, the sealing ball can be completely opened or closed, the operation accuracy can be improved, and the water flow injection action can be rapidly completed;

the second step is as follows: the rectifier and the nozzle outer sleeve can be kept stable when being adjusted to a certain position by combining the flow regulating mechanism and the flow state regulating mechanism, so that the rectifier and the nozzle outer sleeve are prevented from moving automatically, the spraying position is kept stable, and the sprayed water flow form is also kept stable;

and thirdly: through the mutually rotating installation sleeve and the adapter sleeve, the use convenience can be improved in the processes of connecting an external fire-fighting water pipe and using the fire-fighting water pipe;

and the fourth step: in the outward spraying process, water passes through the rectifier, the central column, the water retaining block and the nozzle outer sleeve and can be reflected for multiple times, reaction force generated by spraying acts on the reflecting surfaces respectively, recoil force generated on the body is almost zero, and water flow is prevented from being sprayed out of the water outlet assembly without blocking.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a sectional view in vertical section of the present embodiment;

FIG. 3 is a sectional view in horizontal section of the present embodiment;

FIG. 4 is a schematic view of a partial structure mainly used for embodying a limiting block in the present embodiment;

FIG. 5 is an enlarged view of section I of FIG. 2, primarily illustrating the balls and the ball-pouring grooves;

FIG. 6 is a partial sectional view of the present embodiment, primarily showing the interior of the adjustment tube;

FIG. 7 is a schematic view of a partial explosion structure mainly used for embodying the connecting sleeve and the adjusting pipe in the embodiment;

fig. 8 is an enlarged view of a portion II of fig. 7, and is mainly used to embody a ball.

Reference numerals: 1. a body; 2. a water outlet assembly; 21. an adjusting tube; 221. a central column; 222. a rectifier; 223. an adjusting ring; 224. a water retaining block; 231. a nozzle jacket; 232. connecting sleeves; 3. a water inlet assembly; 31. installing a sleeve; 32. a transfer sleeve; 33. a fire interface; 4. a sealing ball; 41. a through port; 5. a switch handle; 6. a limiting groove; 7. a limiting block; 8. a dot position groove; 9. a positioning bead; 10. the spring is tightly propped; 11. a ball groove; 12. a ball bearing; 13. filling a bead opening; 14. plugging the bolt; 15. a water outlet gap; 16. an adjustment groove; 17. a contact block; 18. an arc-shaped groove; 19. an elastic ring; 20. adjusting the spring; 24. a guide groove; 25. a support block; 26. a circular spring; 27. a through hole; 28. a round bead; 29. a bead placing groove; 30. a front seal seat; 34. a rear seal seat; 35. rotating the column; 36. a fitting groove; 37. a sliding hole; 40. a helical groove; 42. locking the nut; 43. a clamping groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a zero recoil fire-fighting lance, refer to fig. 1 and show, including the play water subassembly 2 that connects gradually after to in the past, body 1 and the subassembly 3 of intaking, it is shown to combine fig. 2, it has one to set up the ball sealer 4 through mouthful 41 to rotate to be connected with one at the inside of body 1, and rotate at the outer wall of body 1 and be connected with a switch lever 5 that is connected with ball sealer 4, when using, be connected outside fire hose and the subassembly 3 of intaking, rethread rotation switch lever 5 drives ball sealer 4 and rotates, thereby change ball sealer 4's through mouthful 41 with the subassembly 3 of intaking and the relative position of play water subassembly 2, when through mouthful 41 with the subassembly 3 of intaking, when play water subassembly 2 homogeneous phase intercommunication, make rivers can flow through into water subassembly 3 and body 1, outwards spray from play water subassembly 2 at last.

The setting runs through mutually at body 1 fore-and-aft both ends face, be provided with preceding seal receptacle 30 and back seal receptacle 34 around the inside of body 1, preceding seal receptacle 30 inlays to be established and installs on the step face of body 1 inside, preceding seal receptacle 30 and back seal receptacle 34 are arranged in to ball sealer 4, and ball sealer 4's the mouth 41 cross-section that passes through is circular, ball sealer 4's axis of rotation is the level and is perpendicular rather than the central axial that passes through mouth 41, when ball sealer 4 rotates to its central axial that passes through mouth 41 to be vertical, ball sealer 4's leading flank closely laminates with preceding seal receptacle 30's trailing flank mutually, ball sealer 4's trailing flank closely laminates with the leading flank of back seal receptacle 34 mutually.

Referring to fig. 1, the switch handle 5 is U-shaped, and both ends are disposed on both sides of the body 1, the side wall of the switch handle 5 is fixed with a rotation column 35 through a bolt, the rotation column 35 is inserted into the side wall of the body 1 in a rotation fit manner, referring to fig. 3, one end of the rotation column 35 far away from the switch handle 5 extends into the body 1, and the cross section of the end portion is hexagonal, and is matched with the end portion, an embedding groove 36 for embedding the rotation column 35 is formed in each of both side walls of the seal ball 4, after the installation, the end portion of the rotation column 35 is embedded into the embedding groove 36, when the switch handle 5 is rotated, the seal ball 4 is driven to rotate through the transmission of the rotation column 35, so that the direction of the central axis of the through port 41 is changed.

In the using process, when a user rotates the switch handle 5, in order to enable the passing opening 41 of the sealing ball 4 to reach the maximum passing volume of water flow, referring to fig. 1, an arc-shaped limiting groove 6 is formed in the position, above the rotating column 35, of the body 1, and the center of an arc line formed between two ends of the limiting groove 6 is overlapped with the center of the rotating column 35; referring to fig. 4, a limiting block 7 capable of being embedded in the limiting groove 6 is arranged on a side wall of the switch handle 5, when the switch handle 5 is rotated, the limiting block 7 is driven to move from one end of the limiting groove 6 to the other end, when the limiting block 7 is located at the front end of the limiting groove 6, the central axis of the through opening 41 of the sealing ball 4 is vertical, and the sealing ball is in a closed state, and when the limiting block 7 is located at the rear end of the limiting groove 6, the central axis of the through opening 41 of the sealing ball 4 is horizontal, and the sealing ball is in an open state.

Referring to fig. 1, because water flow may cause a certain impact force to the sealing ball 4, in order to keep the sealing ball 4 stable, a plurality of point location grooves 8 which are recessed inwards are formed on the bottom wall of the limiting groove 6 along the radian direction of the bottom wall, and the point location grooves 8 which are closest to two ends respectively correspond to the fully opened and fully closed states of the sealing ball 4; meanwhile, as shown in fig. 4, the limiting block 7 is arranged in the sliding hole 37 of the side wall of the switch handle 5 in a penetrating manner and slides, one end of the limiting block 7 stretches out of the sliding hole 37 and the other end of the same is connected with a top tight spring 10, the bottom end of the top tight spring 10 is fixed on the bottom wall of the sliding hole 37, the end part of the limiting block 7 far away from the top tight spring 10 is embedded with a positioning bead 9 in a rolling fit manner, the positioning bead 9 can be embedded in a point position groove 8, the limiting effect is further achieved on the switch handle 5, and the stability of the switch handle 5 is improved.

Referring to fig. 2, the water inlet assembly 3 comprises an installation sleeve 31 in threaded connection with the rear end of the body 1, the rear seal seat 34 is embedded on a step surface at the front end of the installation sleeve 31, when the installation is carried out, the rear seal seat 34 is installed in the installation sleeve 31, and then the installation sleeve 31 is rotated, so that the rear seal seat 34 on the installation sleeve 31 is abutted against the rear side wall of the seal ball 4, and the front seal seat 30 and the rear seal seat 34 which are easy to wear are convenient to replace; meanwhile, in order to improve the sealing performance between the mounting sleeve 31 and the body 1, a sealing ring (not labeled in the figure) is embedded between the outer wall of the mounting sleeve 31 and the inner wall of the body 1.

Referring to fig. 2, in order to rotate the water inlet assembly 3 and the main body 1 during use, an adapter sleeve 32 is sleeved and rotatably fitted on the outer portion of the mounting sleeve 31 near the rear end, and the front end of the adapter sleeve 32 is wrapped on the outer wall of the mounting sleeve 31; referring to fig. 5, the outer wall of the rear end of the mounting sleeve 31 and the inner wall of the front end of the adapter sleeve 32 are both provided with an inwardly concave ball groove 11, the two ball grooves 11 are arranged oppositely, and a plurality of balls 12 are arranged between the two ball grooves 11; in order to fill the balls 12, the outer wall of the adapter sleeve 32 is provided with a ball filling port 13 communicated with the ball groove 11, and the ball filling port 13 is internally threaded with a plugging bolt 14, so that lubricating oil can be added into the ball groove 11 of the balls 12 or the balls 12 can be replaced. As shown in fig. 2, a fire-fighting joint 33 for connecting an external fire-fighting water pipe is screwed on the rear end of the adapter sleeve 32.

Referring to fig. 2, water flows in from the fire-fighting interface 33, passes through the adapter sleeve 32, the mounting sleeve 31 and the through port 41 in sequence, and finally is sprayed out from the water outlet assembly 2; the water outlet component 2 comprises an adjusting pipe 21 which is connected with the front end of the body 1 in a threaded manner; in order to spray water in different situations, the regulating pipe 21 is provided with a flow rate regulating mechanism for regulating the water flow rate and a flow state regulating mechanism for regulating the water outlet form.

Referring to fig. 2, the flow rate adjusting mechanism includes a central pillar 221, the diameter of the rear end of the central pillar 221 is larger than the flow aperture inside the body 1, and the rear end of the central pillar 221 is disposed between the rear end of the adjusting pipe 21 and the step surface of the front end of the body 1, so that the central pillar 221 can be fixed and limited by the abutting action of the adjusting pipe 21 on the central pillar 221; the rear end of the central column 221 is provided with a plurality of water flow holes (not marked in the figure) penetrating through the end surface thereof, so that the water flow in the body 1 can enter the adjusting pipe 21; the central axis of the central column 221 is parallel to the central axis of the adjusting pipe 21 and extends forwards, a water blocking block 224 is fixedly connected to the top end of the central column 221 through a bolt, and the water blocking block 224 is annular; in order to adjust the water flow, a rectifier 222 is inserted into the front end of the adjusting pipe 21, the rectifier 222 is a cylinder penetrating front and back, the front end of the rectifier 222 is outward bell mouth-shaped, a water outlet gap 15 is formed between the front end of the rectifier 222 and the rear side wall of the water blocking block 224, and the rectifier 222 can be connected to the inner wall of the adjusting pipe 21 in a sliding manner along the central axis of the central column 221; during the forward and backward movement of the commutator 222, the distance between the bell mouth of the commutator 222 and the rear side wall of the water block 224 impacted by the water flow can be changed, so that the size of the water outlet gap 15 is changed, and the water flow and the spraying distance are further adjusted.

Referring to fig. 2, in order to adjust the position of the rectifier 222, first, two symmetrical guide grooves 24 are formed in the inner wall of the rectifier 222, and the length direction of the guide grooves 24 is parallel to the central axial direction of the rectifier 222; the outer wall of the central column 221 near the middle position is integrally formed with supporting blocks 25 which are in one-to-one correspondence with the guiding grooves 24 and are embedded with the sliding fit, so that the rectifier 222 can move along a straight line when moving; referring to fig. 6, a spiral adjusting groove 16 is formed in the outer wall of the rectifier 222, a contact block 17 is embedded in the adjusting groove 16, the contact block 17 is inserted into the outer wall of the adjusting pipe 21, a spiral groove 40 penetrating through the side wall of the adjusting pipe 21 is formed in the adjusting pipe 21, and the contact block 17 is inserted into the spiral groove 40 and extends out of the outer wall of the adjusting pipe 21; and in order to drive the contact block 17 to do rotary motion around the central axial direction of the central column 221, the outer wall of the adjusting pipe 21 is sleeved with and rotated by an adjusting ring 223, the contact block 17 penetrates through the adjusting ring 223, the top end of the contact block 17 is in threaded connection with a locking nut 42, the locking nut 42 is tightly abutted to the outer wall of the adjusting ring 223, and then the contact block 17 and the adjusting ring 223 are stably connected.

Referring to fig. 6, when the adjusting ring 223 is rotated to a certain position, in order to improve the stability of the adjusting ring 223, a plurality of arc-shaped grooves 18 are uniformly formed in the side wall of the adjusting groove 16 along the spiral direction, an elastic ring 19 is sleeved on the outer wall of the portion, embedded in the adjusting groove 16, of the abutting block 17, the elastic ring 19 is made of an elastic material, when the abutting block 17 extends into the adjusting groove 16, the outer wall of the elastic ring 19 abuts against the arc-shaped grooves 18, and therefore the stability of the adjusting ring 223 can be improved.

Referring to fig. 2 and 6, in the water flow spraying process, a backward pushing force is applied to the bell mouth at the front end of the rectifier 222, and in order to keep the rectifier 222 stable, an adjusting spring 20 is sleeved outside the rectifier 222, the front end of the adjusting spring 20 abuts against the side wall of the rectifier 222 away from the bell mouth, and the other end of the adjusting spring is fixed on the inner wall of the adjusting tube 21, so that when the rectifier 222 is driven to move forward by rotating the adjusting ring 223, a labor-saving state can be achieved by the pushing force of the adjusting spring 20, and in the spraying process, a forward pushing force of the rectifier 222 and a reverse pushing force of the water flow to the bell mouth of the rectifier 222 can be counteracted by the adjusting spring 20, so that the rectifier 222 is prevented from moving under the water flow effect to affect the spraying effect.

Referring to fig. 2, the flow state adjusting mechanism includes a nozzle outer sleeve 231 sleeved on and screwed to the outer wall of the front end of the adjusting pipe 21, the front end of the nozzle outer sleeve 231 is in a bell mouth shape, when the nozzle outer sleeve 231 extends out of the front end of the rectifier 222, the water flow is ejected outwards along the bell mouth of the front end of the finisher and impacts the horizontal inner wall of the nozzle outer sleeve 231, at this time, the ejected water flow is converged into a column shape, and when the nozzle outer sleeve 231 moves backwards, the ejected water flow is not blocked by the inner wall of the nozzle outer sleeve 231, so that the water flow can be gradually dispersed outwards, and the effect of dispersed ejection is achieved.

Referring to fig. 2, in order to improve the stability of the nozzle housing 231, a connecting sleeve 232 is integrally formed at the rear end of the nozzle housing 231, and as shown in fig. 7, a circular spring 26 is sleeved and clamped on the outer portion of the connecting sleeve 232 close to the rear end, the circular spring 26 is not full-round, and two ends of the circular spring 26 are clamped in clamping grooves 43 formed in the outer wall of the connecting sleeve 232; a through hole 27 penetrating through the side wall of the connecting sleeve 232 is formed in the connecting sleeve 232, a ball 28 is arranged in the through hole 27, and the diameter of the through hole 27 is larger than that of the ball 28; meanwhile, as shown in fig. 8, a plurality of bead placing grooves 29 are uniformly formed in the outer wall of the portion of the adjusting pipe 21 extending into the connecting sleeve 232 along the circumferential direction, and the beads 28 are stressed by the circular spring 26 and can be abutted against the bead placing grooves 29, so that the connecting sleeve 232 and the nozzle casing 231 are positioned, and the nozzle casing 231 is prevented from rotating due to the external force.

The working principle of the invention is as follows: the adapter sleeve 32 is rotated to drive the fire-fighting water pipe to rotate, so that the external fire-fighting water pipe is connected into the fire-fighting interface 33, the switch handle 5 is rotated to the rear end from the front end of the limiting groove 6, the jacking spring 10 pushes the positioning ball 9 on the limiting block 7 to be embedded in the rearmost point position groove 8, the rotating column 35 drives the sealing ball 4 to rotate, the through hole 41 is rotated to the horizontal from the vertical state, the through hole 41 is communicated with the adapter sleeve 32, and the stability of the switch handle 5 and the sealing ball 4 is kept; the water flow flows through the fire-fighting interface 33, the adapter sleeve 32, the mounting sleeve 31 and the through port 41 in sequence and flows into the adjusting pipe 21, and the water flow is sprayed out from the water outlet gap 15 between the water blocking block 224 and the front end of the rectifier 222.

When the water flow needs to be adjusted, the adjusting ring 223 is rotated, the contact block 17 on the adjusting ring 223 drives the rectifier 222 to move back and forth along the central axis of the central column 221 through the spiral adjusting groove 16, when the rectifier 222 is close to the water blocking block 224, the water outlet gap 15 is reduced, the sprayed water amount is reduced, the spraying distance is also reduced, when the rectifier 222 moves away from the water blocking block 224, the water outlet gap 15 is increased, the sprayed water amount is increased, and the spraying distance is also increased. When the elastic ring 19 of the abutting block 17 is embedded in the arc groove 18 of the side wall of the adjusting groove 16, the position of the rectifier 222 can be stabilized.

When the water flow state needs to be adjusted, the nozzle outer sleeve 231 is rotated, when the nozzle outer sleeve 231 moves forwards, the water flow sprayed from the water outlet gap 15 impacts on the side wall of the nozzle outer sleeve 231 with the horizontal cross section, and then is converged to be in a column shape and sprayed outwards, and when the nozzle outer sleeve 231 moves backwards, and the inclined surface of the bell mouth of the nozzle outer sleeve 231 and the inclined surface of the bell mouth at the front end of the rectifier 222 are in the same arc surface, the water flow is sprayed outwards in a diverging shape. When the nozzle casing 231 rotates to a certain position, the ball 28 is tightly pressed in one of the ball grooves 29 by the round spring 26, so that the position of the nozzle casing 231 is stabilized, meanwhile, in the rotating process of the nozzle casing 231, the ball 28 extrudes the round spring 26, so that the round spring 26 and the connecting sleeve 232 are impacted, further, a sound is generated, and the definition in the adjusting process is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a zero recoil fire-fighting lance, includes body (1), connects in the play water subassembly (2) of body (1) front end, connects in the subassembly (3) of intaking of body (1) rear end, be provided with in body (1) and be used for the intercommunication or close subassembly (3) of intaking and play water subassembly (2) and run through ball sealer (4) that have through mouth (41), body (1) outer wall rotates and is connected with drive ball sealer (4) pivoted switch handle (5), characterized by: the fire-fighting water inlet assembly is characterized in that the body (1) is provided with an inward sunken arc-shaped limiting groove (6), the switch handle (5) is connected with a limiting block (7) embedded in the limiting groove (6), the rotating center of the switch handle (5) and the rotating center of the sealing ball (4) are concentrically arranged, an angle formed by a connecting line between one diameter end of the through port (41) and the center of the sealing ball (4) is the same as an angle formed by a connecting line between the two ends of the limiting groove (6) and the center of the sealing ball (4), the bottom wall of the limiting groove (6) is provided with a plurality of position grooves (8) along the radian of the bottom wall, the end part of the limiting block (7) is in rolling connection with a positioning ball (9) embedded in the position groove (8), the limiting block (7) is in sliding connection with the switch handle (5) along the length direction, one end of the limiting block (7) deviating from the positioning ball (9) is connected with a top-tightening spring (10) between the switch handle (5), the water inlet assembly (3) comprises an installation sleeve (31) hermetically connected to the rear end of the body (1), a switching sleeve (31) rotatably connected to the rear end of the installation sleeve (31), a switching sleeve (32) connected to the rear end of the switching sleeve (31), and a switching sleeve (32) close to the inner wall of the switching sleeve (32) close to the switching sleeve (11), and a switching sleeve (11) close to the switching sleeve, and a switching sleeve (32) close to the switching sleeve, and a switching sleeve (11) close to the inner wall of the switching sleeve which is arranged at the rear end of the switching sleeve, the ball groove (11) is matched with a ball (12) in a rolling manner, the adapter sleeve (32) is provided with a ball filling port (13) communicated with the ball groove (11), the ball filling port (13) is matched with a plugging bolt (14) in a threaded manner, and the water outlet assembly (2) comprises an adjusting pipe (21) hermetically connected to the front end of the body (1), a flow adjusting mechanism connected to the adjusting pipe (21) and a flow state adjusting mechanism connected to the adjusting pipe (21); flow control mechanism includes that one end sealing connection is in between body (1) and adjusting pipe (21) and the other end along center post (221) that body (1) the central axis extends, along body (1) the central axis slip fit in rectifier (222) of adjusting pipe (21) inner wall, rotate and connect in adjusting pipe (21) outer wall and drive adjustable ring (223) that rectifier (222) removed, be formed with outside play water clearance (15) of slope between center post (221) front end and rectifier (222) front end inner wall, rectifier (222) outer wall is seted up and is spiral adjustment tank (16), adjustable ring (223) are connected with and wear to locate adjusting pipe (21) and contradict in conflict piece (17) of adjusting tank (16) lateral wall.

2. The zero recoil fire-fighting lance of claim 1, wherein: the utility model discloses a set up the structure, including adjustment tank (16), setting block (17), setting block, regulating tank (16) lateral wall is equipped with a plurality of arc recess (18) along its helical direction, it is equipped with elastic ring (19) to support contact block (17) bottom cover, elastic ring (19) are contradicted in adjustment tank (16) lateral wall and are inlayed and locate in arc recess (18).

3. The zero recoil fire-fighting lance of claim 1, wherein: the adjusting spring (20) is sleeved outside the rectifier (222) close to the front end, one end of the adjusting spring (20) is connected to the front end of the rectifier (222), and the other end of the adjusting spring is connected to the front end of the adjusting pipe (21).

4. The zero recoil fire-fighting lance of claim 1, wherein: the inner wall of the rectifier (222) is provided with at least two guide grooves (24) which are parallel to the central axial direction of the rectifier (222) and are uniformly arranged along the circumferential direction of the rectifier (222), and the outer wall of the central column (221) is integrally formed with a supporting block (25) embedded in the guide grooves (24).

5. The zero recoil fire-fighting lance of claim 1, wherein: flow state adjustment mechanism includes that threaded connection is nozzle overcoat (231), the integrated into one piece that horn mouth form in nozzle overcoat (231) rear end in control tube (21) outer wall and front end, the outside joint of control sleeve (232) rear end has round spring (26), through-hole (27) have been seted up in control sleeve (232), through-hole (27) are built-in to have ball (28), control tube (21) outer wall has been seted up a plurality of pearl grooves (29) of putting along its circumferencial direction, round spring (26) and put between pearl groove (29) are arranged in to ball (28).