CN113509668B

CN113509668B - Fire engine

Info

Publication number: CN113509668B
Application number: CN202010277272.1A
Authority: CN
Inventors: 林志国; 欧阳联格; 郑宁; 叶玮嵘; 张梁; 欧阳莎; 林旭阳; 肖辉进
Original assignee: Fujian Qiaolong Emergency Equipment Co Ltd
Current assignee: Fujian Qiaolong Emergency Equipment Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2024-03-01
Anticipated expiration: 2040-04-10
Also published as: CN113509668A

Abstract

The invention relates to a fire engine, which comprises a chassis and a multi-stage telescopic arm, wherein the multi-stage telescopic arm is arranged on the chassis, the multi-stage telescopic arm comprises a fire extinguishing mechanism and a fluid conveying unit, the fluid conveying unit comprises a first pipe body, a second pipe body and a driving mechanism, and the first pipe body and the second pipe body are mutually nested in a sliding way; the second pipe body is provided with threads relative to the wall of the first pipe body, the first pipe body is provided with a driving mechanism, the driving mechanism comprises a rotating body and a connecting assembly, the rotating body is provided with threads, the threads of the rotating body are force transmission threads, and the threads of the second pipe body are matched with the threads of the rotating body. Compared with the prior art, the multistage telescopic boom can penetrate through a small working space to convey the fire extinguishing mechanism to a specified fire extinguishing position, and a large high-altitude unfolding space is not needed to implement rapid fire extinguishing.

Description

Fire engine

Technical Field

The invention relates to the technical field of fire protection, in particular to a fire engine.

Background

In the prior art, under the condition of high-rise building fire extinguishing, a folding fire extinguishing vehicle is adopted, and the folding fire extinguishing vehicle needs a relatively large high-altitude operation space. When the folding fire extinguishing vehicle is used, four fixing brackets at the bottom are required to extend out, and after the fixing brackets are fixed, the folding fire extinguishing vehicle starts to stretch; when folding, the folding arm is unfolded, and then the fire extinguishing mechanism is conveyed to a designated fire extinguishing position to start transfusion fire extinguishing.

In the prior art, the following disadvantages exist:

1) When the folding arms are unfolded in the air, a large unfolding space is needed, and when shields such as lines and pipelines exist at high altitudes between the firing buildings, the folding arms are not easy to unfold, and the operation in small roadways and narrow spaces is not easy to operate.

2) The folding arm type high-lift fire truck has large weight due to structural reasons, and has high requirements on ground bearing capacity due to overlarge weight of the whole truck for vehicles with large lifting height.

3) The mechanism is complex, and the failure rate is high.

Disclosure of Invention

Therefore, it is necessary to provide a fire truck for solving the technical problem that the folding arm needs a large unfolding space when unfolding the folding fire truck in the prior art.

To achieve the above object, the present inventors provide a fire engine comprising:

a chassis for movement; and

the multi-stage telescopic arm is arranged on the chassis and comprises a fire extinguishing mechanism and a fluid conveying unit, wherein the fire extinguishing mechanism is arranged on the fluid conveying unit, and the fluid conveying unit is used for conveying fluid to the fire extinguishing mechanism;

the fluid conveying unit comprises a first pipe body, a second pipe body and a driving mechanism, wherein the first pipe body and the second pipe body are mutually nested in a sliding manner;

the second pipe body is provided with threads relative to the wall of the first pipe body, the first pipe body is provided with a driving mechanism, the driving mechanism comprises a rotating body and a connecting component, the rotating body is provided with threads, the threads of the rotating body are force transmission screws, the threads of the second pipe body are matched with the threads of the rotating body, the connecting component is used for relatively fixing the rotating body and the first pipe body in the axial direction, and the rotating body can rotate around the rotating center of the rotating body;

wherein the rotating body is arranged such that when the rotating body rotates about its own rotation center, the threads of the rotating body make a biting movement with the threads of the second pipe body, and an axial driving force is applied to the second pipe body by the mutually threaded biting movement, so that the second pipe body makes an axial relative movement with respect to the first pipe body.

As a preferable structure of the invention, the first pipe body is an outer pipe, the second pipe body is an inner pipe, the first pipe body is sleeved on the second pipe body, and the outer wall of the second pipe body is provided with a first external thread.

In a preferred configuration of the present invention, the rotating body is a rotating nut, the rotating nut is provided with a first internal thread, and the rotating nut is provided on the second pipe body by the cooperation of the first internal thread and the first external thread.

As a preferable structure of the invention, the connecting component comprises a bearing, one side of the bearing is fixedly connected with the axial position of the first pipe body, and the other side of the bearing movably supports the rotating nut.

As a preferable structure of the present invention, the driving mechanism further includes a power source for driving the rotating body to rotate around its own rotation center.

As a preferable configuration of the present invention, the power source is a rotating worm wheel and a worm, the worm is provided on one side of the rotating worm wheel, the rotating worm wheel is fixedly connected with the rotating nut, and the worm is meshed with the rotating worm wheel.

As a preferable structure of the invention, the driving mechanism further comprises a power source, wherein the power source is a rotary fluted disc and a gear, the gear is arranged on one side of the rotary fluted disc, the rotary fluted disc is fixedly connected with the rotary nut, and the gear is meshed with the rotary fluted disc.

As a preferable structure of the present invention, the driving mechanism further includes a power source, the power source is a rotary friction disc and a friction wheel, the friction wheel is disposed on one side of the rotary friction disc, the rotary friction disc is fixedly connected with the rotary nut, and the friction wheel is in contact with the rotary friction disc.

As a preferable configuration of the present invention, the worm, gear or friction wheel of the power source is powered by any one of a hydraulic motor, a pneumatic motor and an electric motor.

As a preferable structure of the present invention, the driving mechanism further includes a cover body connected to one side of the bearing and configured to shield the driving mechanism.

As a preferable structure of the present invention, the cover body includes a first cover body connected to one side of the bearing fixing first pipe body, and a second cover body connected to one side of the bearing movably supporting rotary body.

As a preferable structure of the invention, the connecting assembly further comprises a guide sleeve, the guide sleeve is fixed on the first pipe body, and a guide part matched with the guide sleeve is arranged on the second pipe body.

As a preferable structure of the present invention, the first pipe body and the second pipe body are sealed to each other.

As a preferable structure of the present invention, the first pipe body and the second pipe body are sealed with each other by a seal ring, and the seal ring is located at the end of the second pipe body.

As a preferable structure of the present invention, the multi-stage telescopic arm includes three or more tubes nested with each other, and the fluid delivery unit according to any one of claims 1 to 14 is provided between two adjacent tubes.

As a preferable structure of the present invention, the fire extinguishing mechanism includes a rotation device provided on the fluid delivery unit, a swinging device provided on the rotation device, and a fire water monitor provided on the swinging device for driving the fire water monitor to rotate, the swinging device for driving the fire water monitor to swing.

As an optimal structure of the invention, the fire truck further comprises an aerial ladder, the aerial ladder is arranged on the chassis, the aerial ladder is connected with the multi-stage telescopic arm, and the multi-stage telescopic arm is used for driving the aerial ladder to stretch out and draw back.

Compared with the prior art, the technical scheme is characterized in that the multi-stage telescopic arm is arranged on the chassis and comprises a fire extinguishing mechanism and a fluid conveying unit, the fire extinguishing mechanism is arranged on the fluid conveying unit, the fluid conveying unit comprises a first pipe body, a second pipe body and a driving mechanism, and the first pipe body and the second pipe body are mutually nested in a sliding manner; the second pipe body is provided with threads relative to the wall of the first pipe body, the first pipe body is provided with a driving mechanism, the driving mechanism comprises a rotating body and a connecting component, the rotating body is provided with threads, the threads of the rotating body are force transmission screws, the threads of the second pipe body are matched with the threads of the rotating body, the connecting component is used for relatively fixing the driving mechanism and the first pipe body in the axial direction, and the rotating body can rotate around the rotating center of the rotating body; when the rotary body rotates around the rotation center of the rotary body, the force transmission screw changes the rotary motion of the rotary body into the linear motion of the second pipe body, so that the second pipe body stretches and contracts relative to the first pipe body, and the first pipe body and the second pipe body can be used for conveying fire extinguishing liquid. Therefore, the fire truck can be driven to a specified fire extinguishing position, the fluid conveying unit can penetrate through a small operation space in a spiral telescopic mode, the fire extinguishing mechanism can be conveyed to the specified fire extinguishing position without a large high-altitude unfolding space, and the movable fluid conveying device can conveniently operate in small spaces such as a roadway, a district and a factory to rapidly extinguish fire. The fluid delivery unit may be telescopic in a horizontal or vertical direction to deliver fluid to a specified location. In addition, the fluid conveying unit realizes the integration of the lifting arm and the water conveying pipeline, reduces the bending moment of the arm support, reduces the span of the supporting leg, reduces the operation space requirement, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

Drawings

FIG. 1 is a schematic view of a fire truck according to an embodiment;

FIG. 2 is a schematic view of a fire truck in a first use state according to an embodiment;

FIG. 3 is a schematic view of a fire truck in a second use state according to an embodiment;

FIG. 4 is a schematic structural view of a fire truck in a third use state according to an embodiment;

FIG. 5 is a schematic view of a multi-stage telescopic arm according to an embodiment;

FIG. 6 is a schematic block diagram of a fluid delivery unit according to an embodiment;

FIG. 7 is a schematic block diagram of a fluid delivery unit according to an embodiment;

FIG. 8 is a partial cross-sectional view of a multi-stage telescoping arm according to an embodiment;

FIG. 9 is an enlarged schematic view of FIG. 8 at A;

FIG. 10 is a schematic cross-sectional view at B-B in FIG. 8;

FIG. 11 is a schematic structural view of a second pipe according to an embodiment;

FIG. 12 is a simplified illustration of a fluid delivery unit according to an embodiment;

FIG. 13 is a schematic view of a fluid delivery unit according to an embodiment;

FIG. 14 is a schematic view of an expanded configuration of a fluid delivery unit according to an embodiment;

FIG. 15 is an enlarged schematic view of FIG. 14 at C;

fig. 16 is a cross-sectional view taken at D-D in fig. 14.

Reference numerals illustrate:

1. a multi-stage telescopic arm is arranged on the main body,

10. a fluid delivery unit configured to deliver the fluid,

11. the first pipe body is provided with a first pipe body,

111. the first channel is provided with a first channel,

12. the second pipe body is provided with a plurality of holes,

121. the first external thread of the first screw is provided with a first thread,

122. the guide part is provided with a plurality of guide parts,

123. a third internal thread is provided, which is provided with a third internal thread,

124. the second channel is provided with a first channel,

13. the driving mechanism is used for driving the driving mechanism,

131. the worm wheel is rotated so that the worm wheel,

132. the worm is provided with a plurality of grooves,

133. the power source is used for supplying power to the engine,

14. the rotating body is provided with a plurality of rotating grooves,

141. the first internal thread of the first screw is provided with a first thread,

142. a third external thread is provided, which is provided with a third external thread,

15. the connecting component is connected with the connecting component,

151. the bearing is provided with a plurality of grooves,

151a, one side of the bearing,

151b, the other side of the bearing,

152. the first cover body is provided with a first opening,

153. the guide sleeve is provided with a guide sleeve,

154. a second cover body is arranged on the inner side of the first cover body,

16. the fire-extinguishing mechanism comprises a fire-extinguishing mechanism,

161. the rotating device is provided with a rotating device,

162. the swinging device is provided with a swinging device,

163. a fire-fighting water cannon,

17. the sealing ring is provided with a sealing ring,

2. the chassis is provided with a plurality of grooves,

3. a fixing bracket is arranged on the upper surface of the bracket,

4. the lifting device comprises a lifting device and a lifting device,

5. a slewing device.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.

In the description of the present application, the terms "first," "second," and "second," are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified and defined otherwise; the term "plurality" means two or more, unless specified or indicated otherwise; the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, it should be understood that the terms "upper," "lower," "left," "right," and the like in the embodiments of the present application are described in terms of angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

For a better understanding of the present application, embodiments of the present application are described below in connection with fig. 1 to 16.

Referring to fig. 1 to 4, an embodiment of the present application provides a fire-fighting vehicle, which includes a chassis 2, a head, and a multi-stage telescopic arm 1, wherein the multi-stage telescopic arm 1 is disposed on the chassis 2. The movable fluid conveying device can be a gasoline vehicle, a diesel vehicle, a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle. The chassis 2 includes a power source that provides power to the multi-stage telescopic arm 1, or is additionally provided with a driving device that provides power to the multi-stage telescopic arm 1, and the power source is connected with wheels of the chassis 2 through a transmission mechanism, so as to drive the movable fluid conveying device to travel.

In this embodiment, the movable fluid delivery device further includes a fixed bracket 3, a lifting device 4, and a turning device 5, where the fixed bracket 3, the lifting device 4, and the turning device 5 are respectively disposed on the chassis 2. The fixed support 3 may be extended outwards for balancing the centre of gravity of the movable fluid delivery device. The lifting device 4 can lift the multi-stage telescopic arm 1 to realize the expansion and contraction of various inclination angles of the multi-stage telescopic arm 1. The lifting device 4 is arranged on the turning device 5, and the turning device 5 is used for rotating the lifting device 4, so that the multi-stage telescopic arm 1 is driven to rotate, and the multi-stage telescopic arm 1 stretches in all directions.

Wherein fig. 1 is a schematic view of a movable fluid transport device in a driving state; FIG. 2 is a schematic view of the deployment of the mobile fluid delivery device to deploy the fixed stent 3; FIG. 3 is a schematic view of the movable fluid transport device with the movable fluid transport device extended in a horizontal direction; fig. 4 is a schematic view of the lifting device 4 of the movable fluid transfer device lifting the multi-stage telescopic arm 1. In this manner, the fire suppression mechanism 16 may be transported to a designated location through an aperture, in which case the fire suppression mechanism 16 may comprise a fire monitor.

At this time, after a fire occurs, the movable fluid conveying device is opened to a fire scene, the movable fluid conveying device is fixed through the fixed support 3, the position of a fire extinguishing point is calculated, the fire extinguishing mechanism 16 is aligned to the fire extinguishing point through the cooperation of the lifting device 4 and the rotating device 5, and then the fire extinguishing mechanism 16 is conveyed to a specified position through the multi-stage telescopic arm 1 to extinguish the fire. Through multistage telescopic boom 1, as long as there is a hole that can stretch into, can directly pass to the scene of a fire and put out a fire, can wear fire extinguishing mechanism 16 (such as the water cannon) to workshop, district, the inside of alley directly put out a fire, need not very big high altitude expansion space, need not personnel to get into the scene of a fire, can carry fire extinguishing mechanism 16 to the scene of a fire, implement the quick fire extinguishing of point-to-point.

Optionally, in other embodiments, the fire engine further includes an aerial ladder, the aerial ladder is disposed on the chassis, the aerial ladder is disposed on the lifting device 4 and the turning device 5, the aerial ladder is connected with the multi-stage telescopic arm 1, and the multi-stage telescopic arm 1 is used for driving the aerial ladder to stretch out and draw back. So, can realize that the scaling ladder is flexible with multistage flexible arm 1, scaling ladder and multistage flexible arm 1 cooperation use, send the position of catching fire fast with personnel, realize putting out a fire fast.

As shown in fig. 5, the present embodiment further provides a multi-stage telescopic arm 1, the multi-stage telescopic arm 1 including a fire extinguishing mechanism 16 and a fluid delivery unit 10, the fire extinguishing mechanism 16 being disposed on the fluid delivery unit 10, the fluid delivery unit 10 being configured to deliver fluid to the fire extinguishing mechanism 16. The multi-stage telescopic boom 1 may be provided with two or more fluid delivery units 10 according to the actual telescopic requirement, and the two or more fluid delivery units 10 are nested and connected with each other, so as to extend the length of the multi-stage telescopic boom 1. The fluid delivery unit 10 is provided with a passage through which a fluid passes, and the fire extinguishing mechanism 16 is in communication with the passage.

In this embodiment, the fire suppression mechanism 16 includes a fire-fighting lance or water gun 163, or spray head for delivering other fire suppressant (e.g., fire-fighting foam). The fluid conveying unit 10 is used for conveying fluid and liquid, and the fluid conveying unit 10 can stretch and shorten according to actual needs so as to convey the fire extinguishing agent and the liquid to a designated position. The fluid delivery unit 10 may extend and retract in parallel, may also extend and retract in a downward or upward direction, and may be adjusted according to actual conditions.

Optionally, in this embodiment, the fire extinguishing mechanism 16 includes a rotating device 161, a swinging device 162, and a fire water monitor 163, the fire water monitor 163 is disposed on the multi-stage telescopic arm 1 through cooperation of the rotating device 161 and the swinging device 162, the rotating device 161 is disposed on the fluid conveying unit 10, the swinging device 162 is disposed on the rotating device 161, the rotating device 161 is used for driving the fire water monitor 163 to rotate, and the swinging device 162 is used for driving the fire water monitor 163 to swing. In this embodiment, the rotating device 161 and the swinging device 162 are the rotating device 161 and the swinging device 162 in the prior art, which are not expanded in detail, and the fire monitor 163 has the functions of rotating and pitching 360 degrees around the arm shaft through the rotating device 161 and the swinging device 162.

At this time, the multi-stage telescopic boom 1 can extend the fire extinguishing mechanism 16 into the building of the district and the workshop, and can rotate and swing the fire monitor 163 by 360 degrees through the rotating device 161 and the swinging device 162, so that the fire monitor 163 can spray water towards the ignition point in the building of the district and the workshop, thereby realizing fixed-point water spraying on the ignition point and rapidly extinguishing fire.

As shown in fig. 6 to 7, the specific principle of the fluid delivery unit 10 of the present embodiment is as follows, and the fluid delivery unit 10 includes a first tube 11, a second tube 12, and a driving mechanism 13, where the first tube 11 and the second tube 12 are slidably nested with each other;

the second pipe body 12 is provided with threads relative to the wall of the first pipe body 11, the first pipe body 11 is provided with a driving mechanism 13, the driving mechanism 13 comprises a rotating body 14 and a connecting component 15, the rotating body 14 is provided with threads, the threads of the rotating body 14 are force transmission screws, the threads of the second pipe body 12 are matched with the threads of the rotating body 14, the connecting component 15 is used for relatively fixing the driving mechanism 13 and the first pipe body 11 in the axial direction, and the rotating body 14 can rotate around the rotating center of the connecting component;

in this embodiment, the force-transmitting screw is mainly used for transmitting power, and the screw (or the nut) is rotated by using smaller moment to enable the nut (or the screw) to generate axial movement or larger axial force.

Wherein the rotary body 14 is arranged such that when the rotary body 14 rotates about its own rotation center, the screw threads of the rotary body 14 make a biting movement with the screw threads of the second pipe body 12, and an axial driving force is applied to the second pipe body 12 by the mutually screw biting movement, so that the second pipe body 12 makes an axial relative movement with respect to the first pipe body 11.

In this embodiment, the second pipe body 12 is provided with a first external thread 121, the rotating body 14 is a rotating nut, the rotating nut is provided with a first internal thread 141, and the rotating nut is disposed on the second pipe body 12 through the cooperation of the first internal thread 141 and the first external thread 121.

In this embodiment, the driving mechanism 13 further includes a rotating worm gear 131, a worm 132, and a power source 133, the worm 132 is disposed on one side of the rotating worm gear 131, the rotating worm gear 131 is fixedly connected with a rotating nut, and the worm 132 is meshed with the rotating worm gear 131.

In this embodiment, the connection assembly 15 includes a bearing 151, one side 151a of the bearing is fixedly connected to the axial position of the first tube 11, and the other side 151b of the bearing movably supports a rotation nut.

At this time, the power source 133 drives the worm 132 to rotate, i.e. drives the rotary worm wheel 131 to rotate, so as to drive the threads of the rotary body 14 and the threads of the second pipe body 12 to perform a meshing motion, and apply an axial driving force to the second pipe body 12 through the mutual thread meshing motion, so that the second pipe body 12 performs an axial relative motion with respect to the first pipe body 11.

As shown in fig. 8 to 11, the first pipe body 11 is provided with a first passage 111 inside, the second pipe body 12 is provided with a second passage 124 inside, and the first passage 111 communicates with the second passage 124.

In this embodiment, the first channel 111 is the inside of the first pipe body 11, the second channel 124 is the inside second through hole of the second pipe body 12, and the first through hole is communicated with the second through hole, so that the fluid flow area can be provided maximally.

In this way, the fluid conveying unit 10 realizes the integration of the lifting arm and the water conveying pipeline, reduces the bending moment of the arm support, reduces the span of the supporting leg, reduces the operation space requirement, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

Optionally, the connecting assembly 15 further includes a guide sleeve 153, the first cover 152 is fixed on the first tube body 11 through the guide sleeve 153, and the second tube body 12 is provided with a guide portion 122 that is matched with the guide sleeve 153. In this embodiment, the guide sleeve 153 is fixed on the first pipe body 11, the first cover 152 is fixed on the guide sleeve 153 by a fastener, and the first cover 152 is connected with the rotating nut by a bearing 151, so as to realize the rotation of the rotating nut, and the first cover 152 is fixed on the first pipe body 11 and does not interfere with each other.

Alternatively, in this embodiment, a protruding portion (as shown in fig. 10) is provided on the guide sleeve 153 of the first pipe body 11, and a guiding portion 122 (as shown in fig. 11) is provided on the first external thread 121 of the second pipe body 12, and the protruding portion and the guiding portion 122 cooperate with each other to guide.

Optionally, the first tube 11 and the second tube 12 are sealed with each other. Sealing can be performed by the first external screw thread 121 of the first pipe body 11 and the first internal screw thread 141 of the rotating body 14 being engaged with each other; sealing can also be performed by a rubber sealing mode; in addition, the sealing can be performed in a rubber-plastic combined sealing mode.

Preferably, the first pipe body 11 and the second pipe body 12 are mutually sealed through a sealing ring 17, and the sealing ring 17 is positioned at the tail end of the second pipe body 12. At this time, since the seal ring 17 is located at the end of the second pipe body 12, the length of the second pipe body 12 can be maximally utilized, and the expansion and contraction length of the fluid transfer unit 10 can be effectively increased. It is within the scope of this embodiment to not limit the sealing ring 17 to be located at other positions, such as the middle of the second tube body 12.

Specifically, as shown in fig. 12, in one embodiment of the fluid delivery unit 10, the first pipe body 11 is an outer pipe, the second pipe body 12 is an inner pipe, the first pipe body 11 is sleeved on the second pipe body 12, and the outer wall of the second pipe body 12 is provided with a first external thread 121. The first tube 11 and the second tube 12 form an inner tube and an outer tube, in this embodiment, the first tube 11 is fixed, and the second tube 12 is driven to stretch and retract by the rotating body 14, so that the stretching and retracting of the fluid conveying unit 10 are realized.

As shown in fig. 13 and 14, fig. 14 is a schematic view of the fluid transport unit 10 in a contracted state, and fig. 15 is a schematic view of the fluid transport unit 10 in a contracted state.

As shown in fig. 15 and 16, the rotating body 14 is an optional rotating nut, and the rotating nut is provided with a first internal thread 141, and the rotating nut is provided on the second pipe body 12 by matching the first internal thread 141 with the first external thread 121. The rotating nut is sleeved on the second pipe body 12 through the matching of the first internal thread 141 and the first external thread 121, and the second pipe body 12 can be controlled to stretch and retract in the first pipe body 11 as long as the rotating nut can be driven to rotate.

Optionally, the driving mechanism 13 further includes a rotating worm gear 131, a worm 132, and a power source 133, the worm 132 is disposed on one side of the rotating worm gear 131, the rotating worm gear 131 is fixedly connected with a rotating nut, and the worm 132 is meshed with the rotating worm gear 131. At this time, by matching the worm wheel and the worm 132, the rotation number of the motor or the motor can be reduced to a required rotation number by utilizing the principle of a worm wheel and worm 132 speed reducer and utilizing the speed conversion of a gear, and a larger torque is obtained, so that the rotation of the rotating nut can be conveniently driven.

In other embodiments, the rotary worm wheel 131 and the worm 132 may be replaced by a rotary toothed disc and a gear, the gear is disposed on one side of the rotary toothed disc, the rotary toothed disc is fixedly connected with the rotary nut, and the gear is meshed with the rotary toothed disc. At this time, the rotation of the rotation nut can be driven by the rotation of the driving gear, and the protection scope of the embodiment is also provided.

In other embodiments, the rotating worm wheel 131 and the worm 132 may be a rotating friction disk and a friction wheel, the friction wheel is disposed on one side of the rotating friction disk, the rotating friction disk is fixedly connected with the rotating nut, and the friction wheel is in contact with the rotating friction disk. At this time, the rotation of the rotation nut can be driven by driving the rotation of the friction wheel, and the protection scope of the embodiment is also provided.

Optionally, the driving mechanism 13 further comprises a power source 133, the power source 133 being configured to drive the rotation body 14 to rotate about its own rotation center.

Optionally, worm 132, gear or friction wheel of power source 133 is powered by any one of a hydraulic motor, pneumatic motor, electric motor.

Optionally, in this embodiment, the driving mechanism 13 further includes a cover, and the cover is connected to one side of the bearing 151 and is used for shielding the driving mechanism 13. At this time, the cover body is used for preventing dust and water for the driving mechanism.

Specifically, the cover body includes a first cover body 152 and a second cover body 154, the first cover body 152 is fixed on the first pipe body 11, the first cover body 152 is connected with one side of the bearing 151 where the first pipe body 11 is fixed, and the second cover body 154 is connected with one side of the bearing 151 where the rotating body 14 is movably supported.

In this embodiment, the fluid delivery unit 10 is used as follows: the power source 133 is started, the power source 133 drives the worm 132 to rotate, the worm 132 drives the rotary worm wheel 131 to rotate, and the rotary worm wheel 131 drives the rotary body 14 to rotate, so that the second pipe body 12 stretches out and draws back in the first pipe body 11, then liquid is conveyed in the first pipe body 11, and fire is extinguished. After the fire extinguishing is completed, the worm 132 is driven to rotate by the power source 133, and the second pipe body 12 is retracted, so that the operation is completed.

The movable fluid conveying device is used in the following process: after a fire disaster occurs, the movable fluid conveying device is opened to a fire scene, the movable fluid conveying device is fixed through the fixed support 3, the position of a fire extinguishing point is calculated, the fire extinguishing mechanism 16 is aligned to the fire extinguishing point through the cooperation of the lifting device 4 and the rotating device 5, and then the fire extinguishing mechanism 16 is conveyed to a specified position through the multi-stage telescopic arm 1 to extinguish the fire. Through multistage telescopic boom 1, as long as there is a hole that can stretch into, can directly pass to fire scene and put out a fire, can wear fire extinguishing mechanism 16 (for example water cannon) to workshop, district, the inside of alley and put out a fire directly.

Unlike the prior art, the movable fluid delivery device of the present embodiment can deliver the fire extinguishing mechanism 16 to a fire scene without requiring a large overhead deployment space and without requiring personnel to enter the fire scene, and can perform point-to-point rapid fire extinguishing. In addition, the fluid conveying unit 10 realizes the integration of the lifting arm and the water conveying pipeline, reduces the bending moment of the arm support, reduces the span of the supporting leg, reduces the operation space requirement, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concepts of the present invention, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solution, directly or indirectly, to other relevant technical fields, all of which are included in the scope of the invention.

Claims

1. A fire engine, comprising:

a chassis for movement; and

the multi-stage telescopic arm is provided with more than two fluid conveying units which are mutually nested and connected, and each fluid conveying unit is provided with an independent driving mechanism;

wherein the rotating body is arranged such that when the rotating body rotates around its own rotation center, the threads of the rotating body make a biting movement with the threads of the second pipe body, and an axial driving force is applied to the second pipe body through the mutually threaded biting movement, so that the second pipe body makes an axial relative movement with respect to the first pipe body;

the first pipe body is internally provided with a first channel, the second pipe body is internally provided with a second channel, and the first channel is communicated with the second channel;

the driving mechanism further comprises a rotary worm wheel, a worm and a power source, the worm is arranged on one side of the rotary worm wheel, the rotary worm wheel is fixedly connected with the rotating body, the worm is meshed with the rotary worm wheel, the power source drives the worm to rotate, the worm drives the rotary worm wheel to rotate, and the rotary worm wheel drives the rotating body to rotate, so that the second pipe body stretches in the first pipe body, and the first pipe body and the second pipe body are used for conveying fire extinguishing liquid;

the first pipe body is an outer pipe, the second pipe body is an inner pipe, the first pipe body is sleeved on the second pipe body, and a first external thread is arranged on the outer wall of the second pipe body;

the rotary body is a rotary nut, the rotary nut is provided with a first internal thread, and the rotary nut is arranged on the second pipe body through the cooperation of the first internal thread and the first external thread;

the connecting assembly comprises a bearing, one side of the bearing is fixedly connected with the axial position of the first pipe body, and the other side of the bearing movably supports the rotating nut.

2. The fire truck of claim 1 wherein the drive mechanism further comprises a cover connected to one side of the bearing and adapted to conceal the drive mechanism.

3. The fire truck of claim 2, wherein the cover comprises a first cover and a second cover, the first cover is connected to one side of the bearing-fixed first tube, and the second cover is connected to one side of the bearing-movable support rotator.

4. A fire truck according to any one of claims 1 to 3, wherein: the connecting assembly further comprises a guide sleeve, the guide sleeve is fixed on the first pipe body, and a guide part matched with the guide sleeve is arranged on the second pipe body.

5. A fire truck according to any one of claims 1 to 3, wherein: the first pipe body and the second pipe body are mutually sealed.

6. The fire truck of claim 5 wherein: the first pipe body and the second pipe body are mutually sealed through a sealing ring, and the sealing ring is positioned at the tail end of the second pipe body.

7. The fire truck of claim 1 wherein: the multi-stage telescopic arm comprises more than three mutually nested pipe bodies, and the fluid conveying unit as set forth in any one of claims 1-3 and 6 is arranged between two adjacent pipe bodies.

8. The fire truck of claim 1 wherein: the fire extinguishing mechanism comprises a rotating device, a swinging device and a fire water monitor, wherein the rotating device is arranged on the fluid conveying unit, the swinging device is arranged on the rotating device, the fire water monitor is arranged on the swinging device, the rotating device is used for driving the fire water monitor to rotate, and the swinging device is used for driving the fire water monitor to swing.

9. The fire truck of claim 1 wherein: the fire engine still includes the scaling ladder, the scaling ladder sets up on the chassis, the scaling ladder with multistage flexible arm is connected, multistage flexible arm is used for driving the scaling ladder is flexible.