阅读说明：本技术 一种流体输送单元、多级伸缩臂及可移动流体输送装置 (Fluid conveying unit, multistage telescopic arm and movable fluid conveying device ) 是由 林志国 欧阳联格 郑宁 叶玮嵘 张梁 欧阳莎 林旭阳 肖辉进 于 2020-04-10 设计创作，主要内容包括：本发明涉及了一种流体输送单元、多级伸缩臂及可移动流体输送装置,该流体输送单元,包括第一管体、第二管体以及驱动机构,所述第一管体与所述第二管体之间相互滑动嵌套；所述第二管体相对于所述第一管体的壁设置有螺纹,所述第一管体上设置有驱动机构,所述驱动机构包括旋转体以及连接组件,所述旋转体设置有螺纹,所述旋转体的螺纹为传力螺旋,所述第二管体的螺纹与所述旋转体的螺纹相互配合,所述旋转体可绕其自身的旋转中心旋转。区别于现有技术,本发明可以穿过很小的作业空间,就可以将流体喷射机构输送到指定灭火位置,无需很大的高空展开空间,便于可移动流体输送装置在小巷、小区、工厂等狭小空间作业,实施快速灭火。(The invention relates to a fluid conveying unit, a multistage telescopic arm and a movable fluid conveying device, wherein 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 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 assembly, 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, and the rotating body can rotate around the rotation center of the rotating body. Different from the prior art, the movable fluid conveying device can penetrate through a small operation space to convey the fluid spraying mechanism to a specified fire extinguishing position without a large high-altitude expansion space, is convenient for the movable fluid conveying device to operate in narrow spaces such as a lane, a community, a factory and the like, and can quickly extinguish fire.)

1. A fluid conveying unit is characterized by comprising a first pipe body, a second pipe body and a driving mechanism, wherein the first pipe body and the second pipe body are nested in a sliding mode;

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 fixing the rotating body and the first pipe body in an axial direction, and the rotating body can rotate around the rotation center of the rotating body;

wherein the rotary body is configured such that, when the rotary body rotates about its own rotation center, the thread of the rotary body and the thread of the second pipe body perform an engagement motion, and an axial driving force is applied to the second pipe body by the thread engagement motion with each other, so that the second pipe body performs an axial relative motion with respect to the first pipe body.

2. The fluid delivery unit of claim 1, wherein: 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 first external threads are arranged on the outer wall of the second pipe body.

3. The fluid delivery unit of claim 2, wherein: the rotator is swivel nut, swivel nut is provided with first internal thread, swivel nut passes through first internal thread with the cooperation setting of first external screw thread is in on the second body.

4. The fluid delivery unit of claim 3, wherein: coupling assembling includes the bearing, one side of bearing with fixed connection is gone up to the axial position of first body, the opposite side activity support swivel nut of bearing.

5. The fluid delivery unit of any of claims 1-4, wherein: the driving mechanism further includes a power source for driving the rotating body to rotate about its own rotation center.

6. The fluid delivery unit of claim 5, wherein: the power supply is rotatory worm wheel and worm, the worm sets up one side of rotatory worm wheel, rotatory worm wheel with swivel nut fixed connection, the worm with rotatory worm wheel meshes mutually.

7. The fluid delivery unit of claim 5, wherein: the driving mechanism further comprises a power source, 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.

8. The fluid delivery unit of claim 5, wherein: the driving mechanism further comprises a power source, the power source comprises a rotating friction disc and a friction wheel, the friction wheel is arranged on one side of the rotating friction disc, the rotating friction disc is fixedly connected with the rotating nut, and the friction wheel is in contact with the rotating friction disc.

9. The fluid delivery unit of any of claims 6-8, wherein: the worm, the gear or the friction wheel of the power source is powered by any one of a hydraulic motor, a pneumatic motor and an electric motor.

10. The fluid delivery unit of claims 4 and 5, wherein the drive mechanism further comprises a cover connected to one side of the bearing and configured to cover the drive mechanism.

11. The fluid delivery unit of claim 10, wherein the cover comprises a first cover coupled to a side of the bearing where the first tube is fixed, and a second cover coupled to a side of the bearing where the rotational body is movably supported.

12. The fluid delivery unit of any one of claims 1 to 11, wherein: coupling assembling still includes the uide bushing, the uide bushing is fixed on the first body, be provided with on the second body with the uide bushing guiding part of mutually supporting.

13. The fluid delivery unit of any one of claims 1 to 12, wherein: the first pipe body and the second pipe body are sealed with each other.

14. The fluid delivery unit of claim 13, wherein: the first pipe body and the second pipe body are sealed with each other through a sealing ring, and the sealing ring is located at the tail end of the second pipe body.

15. A multi-stage telescopic boom, comprising:

a fluid ejection mechanism; and

a fluid delivery unit as claimed in any one of claims 1 to 14, wherein the fluid ejection mechanism is provided on the fluid delivery unit, and the fluid delivery unit is adapted to deliver fluid to the fluid ejection mechanism.

16. The multi-stage telescopic arm according to claim 15, wherein: the multi-stage telescopic arm comprises more than three tubes which are nested with each other, and the fluid conveying unit as claimed in any one of claims 1 to 14 is arranged between two adjacent tubes.

17. A mobile fluid delivery device, comprising:

a chassis for movement; and

a multi-stage telescopic arm as claimed in claim 15 or 16, which is provided on the chassis.

Technical Field

The invention relates to the technical field of fire fighting, in particular to a fluid conveying unit, a multistage telescopic boom and a movable fluid conveying device.

Background

In the prior art, a folding fire extinguishing vehicle is adopted under the fire extinguishing condition of a high-rise building, and the folding fire extinguishing vehicle needs a larger high-altitude operation space. When the foldable fire extinguishing vehicle is used, the four fixing supports at the bottom need to be extended out, and after the fixing supports are fixed, the folding and the expansion are started; when folding, need earlier to fold the arm and expand, reach the appointed position of putting out a fire with fluid injection mechanism again, begin the infusion and put out a fire.

In the prior art, the following disadvantages exist:

1) when the folding arm is unfolded in the air, a large unfolding space is needed, and when shelters such as lines and pipelines exist at the high altitude between fire buildings, the unfolding of the folding arm is not facilitated, and the operation in a lane and a narrow space is not facilitated.

2) The folding arm type high-lift fire truck has heavy weight due to the structure, and has high requirement on the ground bearing capacity for vehicles with larger lifting height due to overlarge weight of the whole truck.

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

Disclosure of Invention

Therefore, a fluid conveying unit, a multistage telescopic arm and a movable fluid conveying device are needed to be provided for solving the technical problem that a large unfolding space is needed for unfolding the foldable arm in the folding fire extinguishing vehicle in the prior art.

In order to achieve the above object, the inventor provides a fluid conveying unit, which includes a first pipe, a second pipe and a driving mechanism, wherein the first pipe and the second pipe are 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 fixing the rotating body and the first pipe body in an axial direction, and the rotating body can rotate around the rotation center of the rotating body;

wherein the rotary body is configured such that, when the rotary body rotates about its own rotation center, the thread of the rotary body and the thread of the second pipe body perform an engagement motion, and an axial driving force is applied to the second pipe body by the thread engagement motion with each other, so that the second pipe body performs an axial relative motion with respect to the first pipe body.

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

In a preferred configuration of the present invention, the rotating body is a swivel nut provided with a first female screw, and the swivel nut is provided on the second pipe body by fitting the first female screw and the first male screw.

As a preferable structure of the present invention, the connecting assembly includes a bearing, one side of the bearing is fixedly connected to an axial position of the first pipe, 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 about its own rotation center.

As a preferable structure of the present invention, the power source is a rotary worm wheel and a worm, the worm is disposed on one side of the rotary worm wheel, the rotary worm wheel is fixedly connected to the rotary nut, and the worm is engaged with the rotary worm wheel.

As a preferred structure of the present invention, the driving mechanism further includes a power source, the power source is a rotary fluted disc and a gear, the gear is disposed on one side of the rotary fluted disc, the rotary fluted disc is fixedly connected to the rotary nut, and the gear is engaged 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 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 to the rotating nut, and the friction wheel is in contact with the rotating friction disk.

In a preferred structure of the present invention, the worm, the gear or the 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 connected to one side of the bearing and shielding the driving mechanism.

In a preferred embodiment of the present invention, the cover includes a first cover connected to a side of the bearing where the first pipe is fixed, and a second cover connected to a side of the bearing where the rotating body is movably supported.

As a preferred structure of the present invention, the connecting assembly further includes a guide sleeve, the guide sleeve is fixed to the first pipe body, and the second pipe body is provided with a guide portion that is engaged with the guide sleeve.

As a preferable structure of the present invention, the first pipe and the second pipe are sealed with 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 sealing ring, and the sealing ring is located at a terminal end of the second pipe body.

Different from the prior art, according to the technical scheme, the rotator is provided with threads, the threads of the rotator are force transmission screws, the threads of the second pipe body are matched with the threads of the rotator, the connecting assembly is used for axially and relatively fixing the driving mechanism and the first pipe body, and the rotator can rotate around the rotation center of the rotator; when the rotator rotates around its own rotation center, the power transmission screw changes the rotary motion of the rotator into the linear motion of the second pipe body, thereby realizing the extension and contraction of the second pipe body 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 fluid conveying unit can penetrate through a small operation space in a spiral telescopic mode, the fluid spraying mechanism can be conveyed to a specified fire extinguishing position without a large high-altitude expansion space, and the movable fluid conveying device can conveniently operate in narrow spaces such as a lane, a community, a factory and the like to quickly extinguish fire. 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 legs, reduces the requirement on the operation space, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

To achieve the above object, the present invention also provides a multi-stage telescopic boom, comprising:

a fluid ejection mechanism; and

the fluid delivery unit according to any one of the above-mentioned inventors, wherein the fluid ejection mechanism is provided on the fluid delivery unit, and the fluid delivery unit is configured to deliver a fluid to the fluid ejection mechanism.

As a preferable structure of the present invention, the multi-stage telescopic arm comprises more than three tubes nested with each other, and the fluid conveying unit as described in any one of the above-mentioned provisions of the inventor is provided between two adjacent tubes.

Different from the prior art, above-mentioned technical scheme adopts foretell fluid delivery unit to pass through the flexible mode of spiral, and fluid delivery unit can pass very little operation space, just can carry appointed fire extinguishing position with fluid injection mechanism, need not very big high altitude expansion space, and the portable fluid conveyor of being convenient for carries out quick fire extinguishing in narrow and small space operations such as lane, district, mill. The fluid conveying unit can realize the expansion and contraction in the horizontal or vertical direction to convey the fluid to a specified position. 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 legs, reduces the requirement on the operation space, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

To achieve the above object, the inventors additionally provide a movable fluid transfer device comprising:

a chassis for movement; and

as provided by the inventor above, the multi-stage telescopic boom is arranged on the chassis.

Be different from prior art, above-mentioned technical scheme's portable fluid delivery device can open appointed position of putting out a fire, and through the flexible mode of spiral, the fluid delivery unit can pass very little operating space, just can carry appointed position of putting out a fire with fluid injection mechanism, need not very big high altitude expansion space, and the portable fluid delivery device of being convenient for carries out quick fire extinguishing in narrow and small space operations such as alley, district, mill. The fluid conveying unit can realize the expansion and contraction in the horizontal or vertical direction to convey the fluid to a specified position. 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 legs, reduces the requirement on the operation space, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

Drawings

FIG. 1 is a schematic diagram of a mobile fluid delivery device according to an embodiment;

FIG. 2 is a schematic diagram of a mobile fluid delivery device according to an embodiment in a first operational state;

FIG. 3 is a schematic diagram of a second operational state of the mobile fluid delivery device according to an embodiment;

FIG. 4 is a schematic diagram of a third operational state of the mobile fluid delivery device according to an embodiment;

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

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

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

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

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

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

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

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

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

Description of reference numerals:

1. the multi-stage telescopic arm is provided with a plurality of stages,

10. a fluid delivery unit for delivering a fluid to the patient,

11. a first tube body having a first end and a second end,

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

12. a second tube body having a first end and a second end,

121. the first external thread is provided with a first internal thread,

122. a guide part which is arranged at the front end of the guide part,

123. a third internal thread is provided on the outer surface of the screw,

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

13. a driving mechanism for driving the motor to rotate,

131. the worm wheel is rotated to rotate the worm wheel,

132. a worm screw is arranged on the worm rod,

133. a power source for supplying power to the motor,

14. the rotating body is provided with a rotating body,

141. a first internal thread is provided on the outer surface of the inner shell,

142. a third external thread is arranged on the first external thread,

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

151. a bearing is arranged on the bearing seat, and the bearing seat,

151a, one side of the bearing,

151b, the other side of the bearing,

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

153. the guide sleeve is arranged on the upper end of the guide sleeve,

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

16. a fluid-ejection mechanism for ejecting a fluid,

161. a rotating device is arranged on the base plate,

162. a swinging device is arranged on the base plate and is provided with a swinging device,

163. a fire-fighting water cannon is arranged on the fire-fighting water cannon,

17. a sealing ring is arranged on the inner side of the sealing ring,

2. the chassis is provided with a plurality of supporting plates,

3. a fixed bracket is arranged on the bracket,

4. a lifting device is arranged on the base plate,

5. a turning device.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

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

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

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

Referring to fig. 1 to 4, an embodiment of the present application provides a movable fluid delivery device. The device may be, but is not limited to, a vehicle, a ship, an aircraft, or the like. One embodiment of the present application provides a portable fluid delivery device, and one embodiment of the present application is a fire fighting vehicle, and it includes chassis 2, locomotive and multistage telescopic boom 1, and multistage telescopic boom 1 sets up on 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 comprises a power source which supplies power to the multistage telescopic arm 1 or is additionally provided with a driving device which supplies power to the multistage 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 move.

In this embodiment, the movable fluid delivery device further includes a fixed bracket 3, a lifting device 4, and a rotating device 5, and the fixed bracket 3, the lifting device 4, and the rotating device 5 are respectively disposed on the chassis 2. The fixed support 3 may be extended outward for balancing the center of gravity of the movable fluid transfer device. The lifting device 4 can lift the multi-stage telescopic boom 1, and the telescopic boom 1 can be extended and retracted at various inclination angles. The lifting device 4 is arranged on the slewing device 5, and the slewing device 5 is used for rotating the lifting device 4 so as to drive the multistage telescopic arm 1 to rotate and realize the extension and retraction of the multistage telescopic arm 1 in all directions.

Wherein, fig. 1 is a schematic structural view of a movable fluid conveying device in a driving state; FIG. 2 is a schematic view of the mobile fluid delivery device deploying the stationary support 3; FIG. 3 is a schematic view of the movable fluid delivery device extended in a horizontal direction; fig. 4 is a schematic view of the lifting device 4 of the mobile fluid transfer device lifting the multi-stage telescopic boom 1. Thus, the fluid ejection mechanism 16 may be transported to a desired location through an orifice, and in this embodiment the fluid ejection mechanism 16 may comprise a fire monitor.

At the moment, 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 fluid spraying mechanism 16 is aligned to the fire extinguishing point through the matching of the lifting device 4 and the rotary device 5, and the fluid spraying mechanism 16 is conveyed to a specified position through the multistage telescopic arm 1 to extinguish the fire. Through the multistage telescopic boom 1, as long as a hole capable of extending into is provided, the fluid spraying mechanism 16 (such as a water cannon) can directly penetrate through a fire scene to extinguish fire, the fluid spraying mechanism 16 can directly penetrate through a workshop, a community and a lane to extinguish fire without a large high-altitude expansion space, personnel do not need to enter the fire scene, the fluid spraying mechanism 16 can be conveyed to the fire scene, and point-to-point quick fire extinguishing is implemented.

As shown in fig. 5, the present embodiment further provides a multi-stage telescopic arm 1, where the multi-stage telescopic arm 1 includes a fluid injection mechanism 16 and a fluid delivery unit 10, the fluid injection mechanism 16 is disposed on the fluid delivery unit 10, and the fluid delivery unit 10 is used for delivering fluid to the fluid injection mechanism 16. The multi-stage telescopic boom 1 can be provided with more than two fluid conveying units 10 according to the actual telescopic requirement, and the more than two fluid conveying units 10 are connected in a nested manner, so that the length of the multi-stage telescopic boom 1 is prolonged. The fluid delivery unit 10 is provided with a passage for allowing a fluid to pass therethrough, and the fluid ejection mechanism 16 is in communication with the passage.

In this embodiment, the fluid injection mechanism 16 includes a fire-fighting lance or monitor 163, or a nozzle for delivering other fire-fighting agents (e.g., fire-fighting foam). The fluid delivery unit 10 is used for delivering fluid and liquid, and the fluid delivery unit 10 can be extended or shortened according to actual needs to deliver fire extinguishing agents and liquid to a specified position. The fluid conveying unit 10 may be extended and contracted in parallel, or may be extended and contracted in a downward or upward inclination, and may be adjusted according to actual conditions.

Optionally, in this embodiment, the fluid injection mechanism 16 includes a rotating device 161, a swinging device 162 and a fire monitor 163, the fire monitor 163 is disposed on the multi-stage telescopic arm 1 through the 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 monitor 163 to rotate, and the swinging device 162 is used for driving the fire 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, and the fire monitor 163 has a 360 ° circumferential rotation and pitch function around the arm axis through the rotating device 161 and the swinging device 162 without being expanded in detail.

At this time, the multistage telescopic boom 1 can extend the fluid injection mechanism 16 into the building of the residential quarter or the workshop, and can rotate the fire monitor 163 by 360 degrees and swing the fire monitor 163 by pitching by using the rotating device 161 and the swinging device 162, so as to spray water toward the ignition point in the building of the residential quarter or the workshop, thereby realizing fixed-point water spraying to the ignition point and rapidly extinguishing fire.

As shown in fig. 6 to 7, the fluid delivery unit 10 of the present embodiment has the following specific principle, in which the fluid delivery unit 10 includes a first tube 11, a second tube 12 and a driving mechanism 13, and 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 axially and relatively fixing the driving mechanism 13 and the first pipe body 11, and the rotating body 14 can rotate around the rotation center of the rotating body 14;

in this embodiment, the force transmission screw mainly transmits power, and the nut (or the screw) is rotated by a small torque to generate an axial movement or a large axial force.

Wherein the rotary body 14 is configured such that when the rotary body 14 rotates about its own rotation center, the thread of the rotary body 14 makes an engagement motion with the thread of the second tubular body 12, and an axial driving force is applied to the second tubular body 12 by the thread engagement motion with each other, so that the second tubular body 12 is relatively moved in the axial direction with respect to the first tubular body 11.

In this embodiment, the second tube 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 tube 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 wheel 131, a worm 132 and a power source 133, the worm 132 is disposed on one side of the rotating worm wheel 131, the rotating worm wheel 131 is fixedly connected to the rotating nut, and the worm 132 is engaged with the rotating worm wheel 131.

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

At this time, the power source 133 drives the worm 132 to rotate, that is, the rotary worm wheel 131 is driven to rotate, so as to drive the threads of the rotary body 14 to perform an engagement motion with the threads of the second pipe 12, and an axial driving force is applied to the second pipe 12 through the engagement motion of the threads with each other, so that the second pipe 12 performs an axial relative motion with respect to the first pipe 11.

As shown in fig. 8 to 11, the first pipe 11 is provided with a first passage 111 therein, the second pipe 12 is provided with a second passage 124 therein, and the first passage 111 and the second passage 124 communicate with each other.

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

Therefore, the fluid conveying unit 10 realizes the integration of the lifting arm and the water pipeline, reduces the bending moment of the arm support, reduces the span of the supporting legs, reduces the requirement on the operation space, 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 guiding sleeve 153, the first cover 152 is fixed on the first tube 11 through the guiding sleeve 153, and the second tube 12 is provided with a guiding portion 122 that is engaged with the guiding sleeve 153. In this embodiment, the guiding sleeve 153 is fixed on the first tube 11, the first cover 152 is fixed on the guiding sleeve 153 by a fastening member, the first cover 152 is connected with the spin nut by the bearing 151, so as to rotate the spin nut, and the first cover 152 is fixed on the first tube 11 without interference.

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

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

Preferably, the first pipe 11 and the second pipe 12 are sealed with each other by a sealing ring 17, and the sealing ring 17 is located at the end of the second pipe 12. At this time, since the sealing ring 17 is located at the end of the second pipe 12, the length of the second pipe 12 can be maximally utilized, and the extension and contraction length of the fluid transfer unit 10 can be effectively increased. It is within the scope of the present embodiment to not limit the location of the sealing ring 17 to other locations, such as the middle of the second body 12.

Specifically, as shown in fig. 12, in one embodiment of the fluid transfer unit 10, the first tube 11 is an outer tube, the second tube 12 is an inner tube, the first tube 11 is sleeved on the second tube 12, and the outer wall of the second tube 12 is provided with a first external thread 121. The first pipe 11 and the second pipe 12 form an inner pipe and an outer pipe, and in this embodiment, the first pipe 11 is fixed, and the second pipe 12 is driven to extend and contract by the rotating body 14, so that the fluid delivery unit 10 is extended and contracted.

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

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

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

In other embodiments, the rotating worm wheel 131 and worm 132 can be replaced by a rotating toothed disk and a gear, the gear is disposed on one side of the rotating toothed disk, the rotating toothed disk is fixedly connected with the rotating nut, and the gear is meshed with the rotating toothed disk. In this case, it is within the scope of the present embodiment that the rotation of the swivel nut can be driven by only the rotation of the drive gear.

In other embodiments, the rotating worm wheel 131 and the worm 132 may be provided with a rotating friction disc and a friction wheel, the friction wheel being disposed on one side of the rotating friction disc, the rotating friction disc being fixedly connected to the rotating nut, the friction wheel being in contact with the rotating friction disc. In this case, it is within the scope of the present embodiment that the rotation of the swivel nut can be driven by driving the rotation of the friction wheel.

Optionally, the driving mechanism 13 further includes a power source 133, and the power source 133 is configured to drive the rotating body 14 to rotate about its own rotation center.

Alternatively, the worm 132, gears or friction wheels of the power source 133 may be powered by any one of a hydraulic motor, a pneumatic motor, and an electric motor.

Optionally, in this embodiment, the driving mechanism 13 further includes a cover, which is connected to one side of the bearing 151 and is used to shield 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 tube 11, the first cover body 152 is connected to one side of the bearing 151 fixed on the first tube 11, and the second cover body 154 is connected to one side of the bearing 151 movably supporting the rotating body 14.

In this embodiment, the usage process of the fluid delivery unit 10 is 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 in the first pipe body 11, and then the liquid is conveyed in the first pipe body 11, so that fire is extinguished at a fire point. 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 to complete the operation.

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 fluid spraying mechanism 16 is aligned to the fire extinguishing point through the matching of the lifting device 4 and the rotary device 5, and the fluid spraying mechanism 16 is conveyed to a specified position through the multistage telescopic arm 1 to extinguish the fire. Through the multi-stage telescopic arm 1, as long as a hole capable of extending into is formed, the fire extinguishing device can directly penetrate through a fire scene to extinguish fire, and a fluid spraying mechanism 16 (such as a water cannon) can penetrate through a workshop, a community and a lane to directly extinguish fire.

Different from the prior art, the movable fluid delivery device of the embodiment can deliver the fluid injection mechanism 16 to a fire scene without a large high-altitude expansion space and personnel entering the fire scene, so as to realize point-to-point quick 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 legs, reduces the requirement on the operation space, greatly reduces the weight of the whole vehicle and reduces the requirement on the ground bearing capacity.

It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.