CN215822197U - Fluid conveying device - Google Patents

Abstract

The utility model discloses a fluid conveying device, wherein a multi-stage telescopic arm is movably connected with a swing mechanism, the swing mechanism is arranged on a vehicle chassis, a plurality of supporting legs are arranged on the periphery of the vehicle chassis, a first sensor is also arranged on each supporting leg, and the multi-stage telescopic arm is extended or contracted along the self-axis direction; the angle sensors are arranged at two ends of the multi-stage telescopic arm; the winch is arranged at one end of the multi-stage telescopic arm close to the swing mechanism, and one end of the multi-stage telescopic arm far away from the swing mechanism is connected with the winch through a steel wire rope; the angle sensor is used for detecting the angle values of two end parts of the multi-stage telescopic arm; the control unit is used for calculating the difference between the two angle values and judging whether the difference between the two angle values is larger than a preset angle value or not. When the multi-stage telescopic arm extends outwards, one end of the multi-stage telescopic arm, which is far away from the slewing mechanism, is prevented from bending downwards; and simultaneously, the lifting height of the multistage telescopic arm is increased. While preventing the multi-stage telescopic arm from rotating into the rotation area where the faulty leg is located.

Description

Fluid conveying device

Technical Field

The utility model relates to the technical field of fire fighting, in particular to a 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, will put out a fire the mechanism and reach appointed position of putting out a fire again, begin the infusion and put out a fire.

In the prior art, the following disadvantages exist:

1) when the multi-stage telescopic arm extends out, the multi-stage telescopic arm is easy to deform.

2) When the landing leg breaks down, the vehicle is prone to tilt.

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

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a fluid transfer device that prevents the multistage telescopic arm from being deformed and prevents the vehicle from being inclined when the leg is out of order.

To achieve the above object, the present application provides a fluid transfer device comprising: the device comprises a vehicle chassis, a swing mechanism, an angle sensor, a control unit, a multi-stage telescopic arm, a steel wire winch structure and supporting legs;

the multi-stage telescopic arm is hinged with the swing mechanism, the swing mechanism is arranged on the vehicle chassis and used for driving the multi-stage telescopic arm to rotate horizontally, the number of the supporting legs is multiple, the supporting legs are arranged around the vehicle chassis, and the supporting legs are used for supporting and fixing the vehicle chassis;

the first sensor is arranged on the supporting leg and used for detecting the pressure value of the supporting leg to the ground; the two angle sensors are arranged, and the multi-stage telescopic arm extends or contracts along the self-axis direction; the angle sensor is arranged on different stages of telescopic arms in the multi-stage telescopic arms; the steel wire winch structure comprises a winch, a support arm, a pulley and a steel wire rope; the winch is arranged at one end of the multistage telescopic arm, the other end of the multistage telescopic arm is connected with the winch through the steel wire rope, the support arm is arranged on the multistage telescopic arm, the pulley is arranged at one end, away from the multistage telescopic arm, of the support arm, the steel wire rope bypasses the pulley, and the winch is used for winding and unwinding the steel wire rope; the control unit is electrically connected with the angle sensor and the winch.

Further, the wire reel structure further includes: a plurality of pulleys; a pulley is arranged at one end of the multi-stage telescopic arm far away from the slewing mechanism;

and one end of the steel wire rope is fixed on the winch, and the other end of the steel wire rope sequentially bypasses the pulley at the end part of the support arm, the pulley at the end part of the multi-stage telescopic arm and the pulley at the end part of the support arm and is fixed on the multi-stage telescopic arm.

Furthermore, the support arm is rotatably arranged on the multistage telescopic arm, a hydraulic rod is further arranged on the support arm, one end of the hydraulic rod is rotatably connected with the support arm, and the other end of the hydraulic rod is rotatably connected with the multistage telescopic arm.

Further, the control unit is electrically connected with the swing mechanism and a first sensor, the control unit is used for detecting a pressure value of a certain supporting leg through the first sensor, and when the pressure value detected by the first sensor is lower than a preset value, the control unit prohibits the multi-stage telescopic arm from turning to the area where the supporting leg is located.

Furthermore, the slewing mechanism is also provided with a fixed end, a rotating end and a rotating unit; the fixed end is arranged on the vehicle chassis, the rotating end is rotatably arranged on the fixed end through the rotating unit, and the multi-stage telescopic arm is arranged on the rotating end.

Further, a second sensor is also included; the second sensor is arranged on the slewing mechanism; the control unit is electrically connected with the second sensor, and the second sensor is used for sensing the position of the multi-stage telescopic arm.

Furthermore, the number of the supporting legs is four, two supporting legs are arranged on each side of the vehicle chassis, the vehicle chassis is divided into four rotating areas with right-angled vertex angles by taking the rotating center of the slewing mechanism as a center, the boundary in each rotating area is parallel to or perpendicular to the central axis of the vehicle chassis, and one supporting leg is arranged in each rotating area;

when the pressure value detected by the first sensor on one supporting leg is smaller than a preset value, the slewing mechanism drives the multi-stage telescopic arm to rotate in other rotating areas except the rotating area where the supporting leg is located.

Further, the multi-stage telescopic arm includes: the device comprises a first pipe body, a second pipe body and a driving mechanism; the first pipe body and the second pipe body are mutually nested in a sliding manner; the second pipe body is arranged at one end of the first pipe body in a telescopic mode, the driving mechanism is arranged on the first pipe body, and the driving mechanism is used for driving the second pipe body to stretch in the first pipe body.

Further, the second pipe body is provided with threads relative to the wall of the first pipe body, a driving mechanism is arranged on the first pipe body, the driving mechanism comprises a rotating body, a power source and a connecting assembly, the rotating body is provided with threads, the threads of the second pipe body are matched with the threads of the rotating body, the connecting assembly is used for fixing the rotating body and the first pipe body in an axial direction, and the power source is used for driving the rotating body to 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.

Further, the power supply is rotatory worm wheel and worm, the worm sets up one side of rotatory worm wheel, rotatory worm wheel with rotator fixed connection, the worm with rotatory worm wheel meshes mutually.

Different from the prior art, according to the technical scheme, through the arrangement of the steel wire winch structure, the control unit and the angle sensor, when the multi-stage telescopic boom extends outwards, one end, far away from the swing mechanism, of the multi-stage telescopic boom is prevented from bending downwards, so that the multi-stage telescopic boom is deformed; and simultaneously, the lifting height of the multistage telescopic arm is increased. And meanwhile, the multistage telescopic arm is prevented from rotating to the rotating area where the fault supporting leg is located, and the fire fighting truck is further prevented from inclining and overturning.

Drawings

FIG. 1 is a view of a first section of the multi-stage telescopic boom;

FIG. 2 is a second section of the multi-stage telescopic boom;

FIG. 3 is a view showing the structure of the first and second tubes;

FIG. 4 is a schematic block diagram of the drive mechanism;

FIG. 5 is a schematic block diagram of the power source;

FIG. 6 is a block diagram of the fluid delivery device;

FIG. 7 is an enlarged view taken at A in FIG. 6;

FIG. 8 is an enlarged view of FIG. 6 at B;

FIG. 9 is an enlarged view at C of FIG. 6;

FIG. 10 is a schematic block diagram of the fluid delivery device;

FIG. 11 is an enlarged view of FIG. 10 at D;

fig. 12 is a view showing the structure of the rotation region.

Description of reference numerals:

1. a vehicle chassis;

2. a swing mechanism;

3. a multi-stage telescopic arm;

30. a first pipe body;

31. a second tube body;

4. a wire winch structure;

40. a winch;

41. a wire rope;

42. a support arm;

43. a pulley;

44. a hydraulic lever;

5. a support leg;

6. a first sensor;

7. a second sensor;

70. a rotation region;

8. an angle sensor;

9. a drive mechanism;

90. a rotating body;

91. a power source;

910. rotating the worm gear;

911. a worm;

92. and a bearing.

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.

Referring to fig. 1 to 12, the present invention discloses a fluid delivery device, including: the device comprises a vehicle chassis 1, a slewing mechanism 2, an angle sensor 8, a control unit, a multi-stage telescopic arm 3, a steel wire winch structure 4 and supporting legs 5; the multi-stage telescopic arm 3 is movably connected with the swing mechanism 2, the swing mechanism 2 is arranged on the vehicle chassis 1, the swing mechanism 2 is used for driving the multi-stage telescopic arm 3 to horizontally rotate, a plurality of supporting legs 5 are arranged around the vehicle chassis 1, and the supporting legs 5 are used for supporting and fixing the vehicle chassis 1; the multi-stage telescopic arm 3 extends or contracts along the self-axis direction; the angle sensors 8 are arranged at two ends of the multi-stage telescopic arm 3; the wire winch arrangement 4 comprises a winch 40 and a wire rope 41; the winch 40 is arranged at one end of the multi-stage telescopic boom 3 close to the swing mechanism 2, one end of the multi-stage telescopic boom 3 far away from the swing mechanism 2 is connected with the winch 40 through the steel wire rope 41, and the winch 40 is used for winding and unwinding the steel wire rope 41; the control unit is electrically connected with the angle sensor 8 and the winch 40; the angle sensors 8 are respectively used for detecting the angle values of two end parts of the multi-stage telescopic arm 3; the control unit is used for calculating the difference between the two angle values and judging whether the difference between the two angle values is larger than a preset angle value or not; if the difference between the two angle values is greater than the preset angle value, the control unit drives the winch 40 to tighten the steel wire rope 41.

It should be noted that the swing mechanism 2 is arranged on the fire fighting truck, the swing mechanism 2 can horizontally rotate to any direction, and the multi-stage telescopic boom 3 rotates along with the swing mechanism 2; one end of the multi-stage telescopic arm 3 is rotatably connected with the slewing mechanism 2, so that the multi-stage telescopic arm 3 can rotate around the slewing connection part. The multistage telescopic boom 3 is provided with a plurality of pipe bodies through sliding sleeves, so that the telescopic function of the multistage telescopic boom 3 is realized. When the multi-stage telescopic boom 3 extends, the wire rope 41 on the winch 40 is pulled out by the end of the multi-stage telescopic boom 3 away from the swing mechanism 2.

Wherein, multistage flexible arm 3 can arrange more than two bodys according to the demand of actual flexible, and the fluid transport body more than two is nested each other and is connected to the length of multistage flexible arm 3 of extension. The fluid conveying pipe body is provided with a channel for allowing fluid to pass through.

Please refer to fig. 7 to 8, the angle sensor 8 measures the angle values at two ends of the multi-stage telescopic boom 3 through a built-in gyroscope; specifically, the number of the angle sensors 8 is two, and the two angle sensors are respectively arranged at two ends of the multistage telescopic arm 3, the angle sensors 8 take a horizontal plane as a reference plane, and the included angles between the two ends of the multistage telescopic arm 3 and the horizontal plane are respectively measured by the two angle sensors 8; preferably, the angle sensor 8 is arranged at one end of the multi-stage telescopic boom 3 close to the swing mechanism 2, and the angle sensor 8 is arranged at one end of the multi-stage telescopic boom 3 far from the swing mechanism 2.

The wire rope 41 connects one end of the multi-stage telescopic boom 3 away from the slewing mechanism 2 with the winch 40 from above the multi-stage telescopic boom 3; the steel wire rope 41 is wound on the winch 40, and the winch 40 is used for winding and unwinding the steel wire rope 41; under the action of the winch 40, the wire rope 41 can adjust the angle of the end of the multi-stage telescopic boom 3 away from the swing mechanism 2 after the multi-stage telescopic boom 3 extends. Specifically, when the winch 40 tightens the wire rope 41, the wire rope 41 will go upward to the end of the multi-stage telescopic boom 3 away from the swing mechanism 2; when the winch 40 discharges the wire rope 41, the end of the multi-stage telescopic boom 3 away from the swing mechanism 2 moves downward under the action of gravity.

It should be further noted that after the two angle sensors 8 respectively measure the angle information of the positions, the two angle information are sent to the control unit, the control unit calculates an angle difference through the two angles, and determines to drive the winch 40 to tighten or release the steel wire rope 41 according to the angle difference.

In practical use, the multi-stage telescopic arm 3 rotates around the rotating part and stops after reaching a required angle, the multi-stage telescopic arm 3 extends outwards, and under the action of factors such as gravity, one end of the multi-stage telescopic arm 3, which is far away from the slewing mechanism 2, bends downwards, so that the multi-stage telescopic arm 3 deforms; the total height of the multi-stage telescopic arm 3 lifting becomes low and damage to the multi-stage telescopic arm is caused. In order to prevent deformation, the extension length of the multi-stage telescopic arm 3 is increased; this application passes through wire rope 41's traction reduces multistage flexible arm 3 is kept away from slewing mechanism 2's deformation volume reduces simultaneously multistage flexible arm 3's amount of deflection.

Specifically, when the multi-stage telescopic boom 3 extends outwards, the angle sensor 8 measures angles at two ends of the multi-stage telescopic boom 3 through a built-in gyroscope, and sends angle information to the control unit; the control unit calculates the angle difference between the two ends of the multi-stage telescopic boom 3 through two angles, when the angle difference is larger than a preset angle value (in the present application, the preset angle value is preferably 5 °), the winch 40 is driven to operate to tighten the wire rope 41, and when the wire rope 41 is tightened, the wire rope 41 pulls one end of the multi-stage telescopic boom 3 away from the swing mechanism 2 to move upwards, so that the multi-stage telescopic boom 3 is kept straight.

According to the technical scheme, through the arrangement of the steel wire winch structure 4, the control unit and the angle sensor 8, when the multi-stage telescopic boom 3 extends outwards, one end, far away from the slewing mechanism 2, of the multi-stage telescopic boom 3 is prevented from bending downwards, so that the multi-stage telescopic boom 3 deforms; and simultaneously, the lifting height of the multi-stage telescopic arm 3 is increased.

Referring to fig. 1, 2 and 6, in this embodiment, the wire winch structure 4 further includes: an arm 42 and a plurality of pulleys 43; the support arm 42 is rotatably arranged on the outer pipe of the multi-stage telescopic arm 3, the pulley 43 is arranged at one end of the support arm 42 far away from the rotating end, and the pulley 43 is arranged at one end of the multi-stage telescopic arm 3 far away from the slewing mechanism 2;

one end of the wire rope 41 is fixed on the winch 40, and the other end of the wire rope 41 sequentially passes around the pulley 43 at the end of the support arm 42, the pulley 43 at the end of the multi-stage telescopic arm 3 and the pulley 43 at the end of the support arm 42 and is fixed on the outer tube of the multi-stage telescopic arm 3. It should be further noted that the pulley 43 on the support arm 42 is a fixed pulley, the pulley 43 on the multi-stage telescopic arm 3 is a movable pulley, and the movable pulley on the multi-stage telescopic arm 3 is pulled by the wire rope 41 to move downward.

It should be noted that the arrangement of the arm 42 provides an upward traction force to the cable 41, thereby reducing the tension applied by the cable winch 40 to the cable 41. The number of the pulleys 43 on the support arm 42 is two, and one of the wire ropes 41 is provided on each of the two pulleys 43.

It should be further noted that, because both ends of the steel wire rope 41 are connected to the outer tube of the multi-stage telescopic boom 3, one end of the multi-stage telescopic boom 3 away from the swing mechanism 2 is pulled by two steel wire ropes 41, and the gravity borne by the end of the multi-stage telescopic boom 3 is transmitted to the outermost tube body of the multi-stage telescopic boom 3 through the support arm 42 by the steel wire rope 41, so that the outermost tube body of the multi-stage telescopic boom 3 becomes a stressed body.

Of course, in other embodiments, the wire winch structure 4 may not be provided with the support arm 42, that is, the wire rope 41 is directly connected to the winch 40 and the end of the multi-stage telescopic arm 3 away from the slewing mechanism 2; one end of the steel wire rope 41 is wound on the winch 40, and the other end is fixed on the outer pipe of the multi-stage telescopic arm 3 by winding on a pulley 43 on the multi-stage telescopic arm 3. When the multi-stage telescopic boom 3 extends and the angle difference between the two ends of the multi-stage telescopic boom 3 is larger than a preset angle value, the winch 40 is started to pull the steel wire rope 41, and under the action of a large pulling force, one end of the multi-stage telescopic boom 3, which is far away from the slewing mechanism 2, is lifted up under stress, so that the deformation of the multi-stage telescopic boom 3 is reduced.

Referring to fig. 1 and 6, in the present embodiment, a hydraulic rod 44 is further disposed on the supporting arm 42, one end of the hydraulic rod 44 is rotatably connected to the supporting arm 42, and the other end of the hydraulic rod 44 is rotatably connected to the multi-stage telescopic arm 3.

It should be noted that the hydraulic rod 44 drives the support arm 42 to extend, so that the support arm 42 and the second-stage telescopic arm 3 form a non-zero included angle; preferably, the support arm 42 is perpendicular to the multi-stage telescopic arm 3 when extended.

Referring to fig. 6 and 9, in this embodiment, the fluid delivery apparatus further includes: a first sensor 6; the first sensor 6 is arranged on one side of the supporting leg 5, the first sensor 6 is used for detecting the pressure value in the supporting leg 5, and the first sensor 6 is electrically connected with the control unit; wherein, when the pressure value detected by the first sensor 6 is lower than a preset value, the control unit prohibits (i.e. prohibits or avoids) the multi-stage telescopic arm 3 from turning to the area where the support leg 5 is located. If a certain support leg 5 is in fault (a virtual leg or suspended) and the multi-stage telescopic arm 3 is already in the area of the support leg 5, an alarm should be given, or in some embodiments, the multi-stage telescopic arm 3 can be slowly rotated out of the area of the support leg 5.

It should be noted that the swing mechanism 2 on the vehicle chassis 1 is disposed on one side of the vehicle chassis 1, and the support leg 5 is used for fixing a fire fighting truck. It should be noted that a plurality of rotation areas 70 are arranged around the fire fighting truck and rotate around the swing mechanism 2, and each rotation area 70 is spliced with each other, and each leg 5 is located on one rotation area 70; preferably, the number of the rotation areas 70 is four, and the legs 5 are disposed at four corners of the vehicle chassis 1. It should be noted that a plurality of tube bodies are arranged in the multistage telescopic boom 3, the tube bodies are nested in a sliding manner, and the tube bodies can realize the telescopic function of the multistage telescopic boom 3 when being driven.

When the multi-stage telescopic boom 3 extends, the support legs 5 fix the fire fighting truck on the ground, and the swing mechanism 2 drives the multi-stage telescopic boom 3 to rotate; at this time, if a certain landing leg 5 is in failure (a virtual leg or suspended), and the multi-stage telescopic boom 3 rotates to the area where the landing leg 5 is located, the fire fighting truck will be inclined to the area where the landing leg 5 is located.

It should be further noted that the first sensor 6 is configured to detect a stress condition of the landing leg 5, specifically, when the landing leg 5 supports and fixes a fire fighting truck and the multi-stage telescopic boom 3 telescopically rotates, a value detected by the first sensor 6 changes within a normal operation range, and at this time, the landing leg 5 does not malfunction. When the numerical value detected by the first sensor 6 is lower than the minimum value of the normal operation range, the control unit judges that the supporting leg 5 breaks down, and drives the multistage telescopic arm 3 not to rotate to the area where the supporting leg 5 breaks down, so that the fire fighting truck is prevented from inclining and overturning.

It should be further noted that when a certain leg 5 fails, the first sensor 6 on the leg 5 detects that the value is lower than the minimum value of the normal operation range, and at this time, the first sensor 6 sends a value to the control unit, and the control unit drives the swing mechanism 2 to limit the multi-stage telescopic arm 3 from entering the rotation area 70 where the failed leg 5 is located; the preset value is the minimum value of the normal operation range. Of course, in other embodiments, the control structure may also send fault data to the operator's cab alerting the operator not to rotate the multi-stage telescopic arm 3 into the rotation zone 70 where the fault occurred.

It should be further noted that the first sensor 6 detects the stress condition of the leg 5 as follows: a pressure parameter within the mounting arm 42 is sensed. Specifically, the pressure parameter will vary within the normal operation range, that is, when the multi-stage telescopic boom 3 rotates to a certain leg 5, the force applied to the leg 5 will become large due to the multi-stage telescopic boom 3, and the pressure value in the leg 5 will also become large; similarly, when the multi-stage telescopic arm 3 rotates to a certain leg 5, the stress on the rest legs 5 is reduced due to the multi-stage telescopic arm 3, and the pressure value in the leg 5 is also reduced.

According to the technical scheme, the rotation area 70, the swing mechanism 2, the first sensor 6, the multi-stage telescopic arms 3, the supporting legs 5 and the control unit are arranged, so that the multi-stage telescopic arms 3 are prevented from rotating into the rotation area 70 where the fault supporting legs 5 are located, and the fire fighting truck is further prevented from inclining and overturning.

Referring to fig. 10 to 12, in the present embodiment, a fixed end, a rotating end and a rotating unit are further disposed on the rotating mechanism 2; the fixed end is arranged on the vehicle chassis 1, the rotating end is rotatably arranged on the fixed end through the rotating unit, and the multi-stage telescopic arm 3 is arranged on the rotating end. The fluid delivery device further comprises: a second sensor 7; the number of the second sensors 7 is multiple, and the second sensors 7 are wound on the fixed end of the slewing mechanism 2; the control unit is electrically connected with the second sensor 7, and the second sensor 7 is used for sensing the position of the multi-stage telescopic arm 3.

It should be noted that the rotating unit may rotate a shaft or a rotating bearing 92, and the rotating unit rotates around the rotation center of the slewing mechanism 2, and the multi-stage telescopic arm 3 rotates together with the rotating end.

The number of the second sensors 7 (which may be angle sensors) is 4, and the number of the support legs 5 is also 4, 4 of the second sensors 7 are arranged around the rotation center of the slewing mechanism 2; a plurality of rays which are formed by respectively passing through the plurality of second sensors 7 with the rotation center as an end point divide an area formed by the rotation of the multi-stage telescopic boom 3 around the rotation center into four rotation areas 70, and each rotation area 70 is provided with one support leg 5;

when the pressure value detected by the first sensor 6 on one of the support legs 5 is smaller than a preset value, the slewing mechanism 2 drives the multi-stage telescopic arm 3 to rotate in the remaining three rotation areas 70.

In some embodiments, the number of the legs 5 is four, and two legs are provided on each side of the vehicle chassis, and the legs may be symmetrically disposed on the left and right sides of the central axis of the vehicle chassis (i.e., the center line of the vehicle chassis in the front-back direction). Dividing the vehicle chassis into four rotating areas with vertex angles (the vertex angle of the vertex angle is the rotating center of the slewing mechanism) as right angles by taking the rotating center of the slewing mechanism as a center, wherein the boundary in the rotating area is parallel (or possibly coincident) or vertical (one rotating area has two boundaries, one is parallel and the other is vertical) to the central axis of the vehicle chassis, and each rotating area is internally provided with one supporting leg; when the pressure value detected by the first sensor on one supporting leg is smaller than a preset value, the slewing mechanism drives the multi-stage telescopic arm to rotate in other rotating areas except the rotating area where the supporting leg is located. The supporting legs in the four rotating areas are relatively evenly stressed, and control is facilitated.

Referring to fig. 11, in the present embodiment, a second sensor 7 is further included; the number of the second sensors 7 is multiple, and the second sensors 7 are wound on the fixed end of the slewing mechanism 2; the control unit is electrically connected with the second sensor 7, and the second sensor 7 is used for sensing the position of the multi-stage telescopic arm 3; the multi-stage telescopic arm 3 is rotated to form a virtual circle by taking the rotation center as the circle center and the multi-stage telescopic arm 3 as the radius; a plurality of rays formed by passing through the second sensor 7 with the rotation center as an end point divide the virtual circle into a plurality of rotation regions 70, and one leg 5 is provided in each rotation region 70.

It should be noted that the distance between the second sensor 7 and the rotation center is smaller than the length of the multi-stage telescopic arm 3, so that the second sensor 7 can detect the multi-stage telescopic arm 3; the rotation area 70 is a virtual sector, and the second sensor 7 is placed on the side of the sector. In practice, the position of the multi-stage telescopic boom 3 is monitored by the second sensors 7 on both sides of the rotation area 70.

Specifically, when the leg 5 in a certain rotation region 70 fails and the second sensors 7 on both sides of the rotation region 70 detect the multi-stage telescopic boom 3, the control unit drives the multi-stage telescopic boom 3 to rotate in the opposite direction, so as to prevent the multi-stage telescopic boom 3 from entering the rotation region 70 with the failed leg 5.

Referring to fig. 4, in the present embodiment, there are 4 second sensors 7, and there are 4 support legs 5, and 4 second sensors 7 are disposed around the rotation center of the rotating mechanism 2; a plurality of rays which are formed by respectively passing through the plurality of second sensors 7 with the rotation center as an end point divide an area formed by the rotation of the multi-stage telescopic boom 3 around the rotation center into four rotation areas 70, and each rotation area 70 is provided with one support leg 5; when the working parameter detected by the first sensor 6 on one of the support legs 5 is smaller than a preset value, the slewing mechanism 2 drives the multi-stage telescopic arm 3 to rotate in the remaining three rotation areas 70.

Preferably, the second sensor 7 and the rotation center form a virtual rectangular coordinate system with the rotation center as an origin, the second sensor 7 is respectively arranged on the positive half shaft of the X-axis, the negative half shaft of the X-axis, the positive half shaft of the Y-axis and the negative half shaft of the Y-axis, and one support leg 5 is arranged in each quadrant.

In this embodiment, there are 4 legs 5, and there are four second sensors 7, and the second sensors 7 and the legs 5 are alternately arranged; when a certain supporting leg 5 has a fault, when the multi-stage telescopic arm 3 rotates to the second sensors 7 on the two sides of the faulty supporting leg 5, the control unit receives a signal sent by the second sensors 7 and drives the slewing mechanism 2 to drive the multi-stage telescopic arm to rotate in the opposite direction, that is, the multi-stage telescopic arm 3 is prevented from entering the rotating area 70 where the faulty supporting leg 5 is located.

It should be further noted that, when the multi-stage telescopic boom 3 passes through one of the second sensors 7 in a certain direction (clockwise or counterclockwise) and does not pass through the second sensor 7 in the forward direction, the control unit determines that the multi-stage telescopic boom 3 is now placed in the rotation area 70 where the multi-stage telescopic boom 3 enters.

In some embodiments, the detection of the leg pressure value may be achieved by a proximity sensor (position sensor). The first sensor is a proximity sensor; the bottom of the supporting leg is movably connected with a bottom plate (for example, a disc which is arranged at the lowest part of the supporting leg and is used for being contacted with the ground in fig. 6 is used for increasing the contact surface with the ground, and the bottom plate can move up and down for a certain distance relative to the bottom of the supporting leg); the proximity sensor is arranged between the bottom of the supporting leg and the bottom plate, and is used for detecting the distance between the bottom of the supporting leg and the bottom plate so as to detect the pressure value of the supporting leg to the ground. When the proximity sensor detects that the bottom plate is far away from the bottom of the supporting leg (namely, the distance is large), the supporting leg is considered to be virtual leg or suspended, and if the pressure value detected by the first sensor is lower than a preset value, the control mechanism prohibits the multi-stage telescopic arm from turning to the area where the supporting leg is located. When the proximity sensor detects that the bottom plate is close to the bottom of the supporting leg (namely the distance is small), the supporting leg is considered to be stressed normally, and the pressure value detected by the first sensor is considered to be not lower than a preset value, and the control mechanism allows the multi-stage telescopic arm to turn to the area where the supporting leg is located.

Referring to fig. 3 to 5, in the present embodiment, the multi-stage telescopic boom 3 includes: a first tube 30, a second tube 31 and a drive mechanism 9; the first pipe body 30 and the second pipe body 31 are mutually nested in a sliding manner; the second tube 31 is telescopically arranged at one end of the first tube 30, the driving mechanism 9 is arranged on the first tube 30, and the driving mechanism 9 is used for driving the second tube 31 to be telescopically arranged in the first tube 30. It should be noted that, in the fire fighting truck, a plurality of pipe bodies are arranged in the multi-stage telescopic boom 3, and are nested in a sliding manner, two of the pipe bodies are taken as an example in the present application, the first pipe body 30 is an outer pipe, the second pipe body 31 is an inner pipe, and the outer pipe is sleeved on the inner pipe. Thus, the driving means 9 are also present at the end of the second tubular body 31, and the outer wall of the first tubular body 30 can also have guiding grooves and threads.

Referring to fig. 3, in this embodiment, the driving mechanism 9 includes a rotating body 90 and a connecting assembly, the rotating body 90 is provided with a thread, the thread of the rotating body 90 is a force transmission screw, the thread of the second tube 31 is matched with the thread of the rotating body 90, the connecting assembly is used for axially fixing the rotating body 90 and the first tube 30 relatively, and the rotating body 90 can rotate around its own rotation center; wherein, the rotating body 90 is configured such that when the rotating body 90 rotates around its own rotation center, the thread of the rotating body 90 and the thread of the second tube 31 perform an engagement motion, and an axial driving force is applied to the second tube 31 by the mutual thread engagement motion, so that the second tube 31 performs an axial relative motion with respect to the first tube 30. The drive mechanism 9 further includes: a power source 91, the power source 91 being for driving the rotating body 90 to rotate about its own rotation center. The power source 91 is a rotary worm wheel 910 and a worm 911, the worm 911 is disposed at one side of the rotary worm wheel 910, the rotary worm wheel 910 is fixedly connected to the rotary body 90, and the worm 911 is engaged with the rotary worm wheel 910.

The rotating body 90 is a rotating nut, and an internal thread is provided on the rotating nut, and the rotating nut internal thread is engaged with the external thread of the second pipe 31 to be provided on the second pipe 31. The swivel nut is sleeved on the second pipe body 31 through the matching of the internal thread of the swivel nut and the external thread of the second pipe body 31, and the second pipe body 31 can be controlled to stretch in the first pipe body 30 as long as the swivel nut can be driven to rotate.

Referring to fig. 4 to fig. 5, it should be further noted that the power source 91 is disposed on one side of the rotating body 90, and the power source 91 is used for driving the rotating body 90 to rotate. The power source 91 comprises a rotating worm wheel 910 and a worm 911, the worm 911 is arranged on one side of the rotating worm wheel 910, the rotating worm wheel 910 is fixedly connected with a rotating nut, and the worm 911 is meshed with the rotating worm wheel 910. At this time, by the cooperation of the worm wheel and the worm 911, 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 gear 911 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 gear 910 and the worm 911 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 engaged 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 gear 910 and the worm 911 may be replaced by a rotating friction disk and a friction wheel, the friction wheel is disposed at 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. 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.

It should be noted that the worm 911, the gear or the friction wheel is powered by any one of a hydraulic motor, a pneumatic motor and an electric motor. In some embodiments, the drive mechanism 9 further comprises a cover for covering the drive mechanism 9. At this time, the cover is used for dust-proof and water-proof of the drive mechanism 9.

The connecting assembly includes a bearing 92, one side of the bearing 92 is fixedly connected to the axial position of the first pipe 30, and the other side of the bearing 92 movably supports the rotating body 90.

In practical use, the driving mechanism 9 is used as follows: open power supply 91, power supply 91 drive worm 911 rotates, and worm 911 drives rotatory worm wheel 910 rotatory, and rotatory worm wheel 910 drives the rotator 90 rotatory to realize the flexible of second body 31 in first body 30, then the infusion body in the first body 30 again, thereby put out a fire to the ignition point. After the fire extinguishing is finished, the worm 911 is driven to rotate by the power source 91, the second pipe body 31 is retracted, and the operation is finished.

In some embodiments, the driving mechanism 9 includes a connecting assembly for axially fixing the rotating body 90 and the first pipe 30 relative to each other. The connecting assembly includes a bearing 92, one side of the bearing 92 is fixedly connected to the axial position of the first pipe 30, and the other side of the bearing 92 movably supports the rotating body 90.

It should be noted that, although the above embodiments have been described herein, the utility model 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.

Claims (10)

1. A fluid delivery device, comprising: the device comprises a vehicle chassis, a swing mechanism, a first sensor, an angle sensor, a control unit, a multi-stage telescopic arm, a steel wire winch structure and supporting legs;

the multi-stage telescopic arm is hinged with the swing mechanism, the swing mechanism is arranged on the vehicle chassis and used for driving the multi-stage telescopic arm to rotate horizontally, the number of the supporting legs is multiple, the supporting legs are arranged around the vehicle chassis, and the supporting legs are used for supporting and fixing the vehicle chassis;

the first sensor is arranged on the supporting leg and used for detecting the pressure value of the supporting leg to the ground; the two angle sensors are arranged, and the multi-stage telescopic arm extends or contracts along the self-axis direction; the angle sensor is arranged on different stages of telescopic arms in the multi-stage telescopic arms; the steel wire winch structure comprises a winch, a support arm, a pulley and a steel wire rope; the winch is arranged at one end of the multistage telescopic arm, the other end of the multistage telescopic arm is connected with the winch through the steel wire rope, the support arm is arranged on the multistage telescopic arm, the pulley is arranged at one end, away from the multistage telescopic arm, of the support arm, the steel wire rope bypasses the pulley, and the winch is used for winding and unwinding the steel wire rope; the control unit is electrically connected with the angle sensor and the winch.

2. The fluid transfer device of claim 1, wherein the wire reel structure further comprises: a plurality of pulleys; a pulley is arranged at one end of the multi-stage telescopic arm far away from the slewing mechanism;

and one end of the steel wire rope is fixed on the winch, and the other end of the steel wire rope sequentially bypasses the pulley at the end part of the support arm, the pulley at the end part of the multi-stage telescopic arm and the pulley at the end part of the support arm and is fixed on the multi-stage telescopic arm.

3. The fluid transfer device according to claim 2, wherein the support arm is rotatably disposed on the multi-stage telescopic arm, and a hydraulic rod is further disposed on the support arm, one end of the hydraulic rod is rotatably connected to the support arm, and the other end of the hydraulic rod is rotatably connected to the multi-stage telescopic arm.

4. The fluid transfer device as claimed in claim 1, wherein the control unit is electrically connected to the swing mechanism and a first sensor, the control unit is configured to detect a pressure value of a leg through the first sensor, and when the pressure value detected by the first sensor is lower than a predetermined value, the control unit prohibits the multi-stage telescopic arm from being steered to a region where the leg is located.

5. The fluid delivery device as claimed in claim 4, wherein the rotating mechanism further comprises a fixed end, a rotating end and a rotating unit; the fixed end is arranged on the vehicle chassis, the rotating end is rotatably arranged on the fixed end through the rotating unit, and the multi-stage telescopic arm is arranged on the rotating end.

6. The fluid delivery device of claim 5, further comprising a second sensor; the second sensor is arranged on the slewing mechanism; the control unit is electrically connected with the second sensor, and the second sensor is used for sensing the position of the multi-stage telescopic arm.

7. The fluid transfer device according to claim 6, wherein the number of the legs is four and two legs are provided on each side of the vehicle chassis, the vehicle chassis is divided into four rotation regions with right-angled corners around the rotation center of the swing mechanism, the boundaries of the rotation regions are parallel or perpendicular to the central axis of the vehicle chassis, and one leg is provided in each rotation region;

when the pressure value detected by the first sensor on one supporting leg is smaller than a preset value, the slewing mechanism drives the multi-stage telescopic arm to rotate in other rotating areas except the rotating area where the supporting leg is located.

8. The fluid delivery device of claim 1, wherein the multi-stage telescoping arm comprises: the device comprises a first pipe body, a second pipe body and a driving mechanism; the first pipe body and the second pipe body are mutually nested in a sliding manner; the second pipe body is arranged at one end of the first pipe body in a telescopic mode, the driving mechanism is arranged on the first pipe body, and the driving mechanism is used for driving the second pipe body to stretch in the first pipe body.

9. The fluid transfer device according to claim 8, wherein the second pipe body is provided with a thread with respect to a wall of the first pipe body, the first pipe body is provided with a driving mechanism, the driving mechanism includes a rotating body provided with a thread, the thread of the second pipe body is engaged with the thread of the rotating body, a power source for relatively fixing the rotating body and the first pipe body in an axial direction, and a connecting member for driving the rotating body to rotate about its own rotation center;

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.

10. The fluid delivery device as defined in claim 9, wherein 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 body, and the worm is engaged with the rotary worm wheel.

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