CN216295074U - Cantilever crane anticreep device among fluid conveying device - Google Patents

Abstract

The utility model discloses an anti-falling device for an arm support in a fluid conveying device, wherein a first pipe body and a second pipe body are mutually nested in a sliding mode, the second pipe body is arranged at one end of the first pipe body in a telescopic mode, a driving mechanism is arranged on the first pipe body, and the driving mechanism is used for driving the second pipe body to stretch relative to the first pipe body; the control unit is electrically connected with the driving mechanism and the sensor; the sensor is arranged on the first pipe body; the sensing induction units are positioned at two ends of the second pipe body; the sensor is used for sensing the sensing unit; when the sensor is over against one sensing unit, the control unit drives the driving mechanism to stop when the sensing unit is detected by the sensor. Through the arrangement of the through hole, the sensor, the guide block, the guide groove and the sensing unit, the second pipe body is prevented from being over-positioned when being extended out or retracted; further prevent that the second body from droing from first body, perhaps prevent the first body damage.

Description

Cantilever crane anticreep device among fluid conveying device

Technical Field

The utility model relates to the technical field of fire fighting, in particular to an anti-falling device for an arm support in 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 inner pipe extends out, the inner pipe is easy to be separated from the end part of the outer pipe.

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

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide an anti-drop device for a boom in a fluid conveying device, which prevents the second pipe from dropping out of the first pipe.

In order to achieve the above object, the present application provides an anti-drop device for a boom in a fluid delivery device, including: the device comprises a sensor, a control unit, a sensing unit, a first pipe body, a second pipe body and a driving mechanism;

the first tube body and the second tube body are mutually nested in a sliding mode, the second tube body is arranged at one end of the first tube body in a telescopic mode, the driving mechanism is arranged on the first tube body, and the driving mechanism is used for driving the second tube body to stretch and retract relative to the first tube body; the control unit is electrically connected with the driving mechanism and the sensor;

the sensor is arranged on the first pipe body; the sensing induction units are positioned at two ends of the second pipe body; the sensor is used for sensing the sensing unit.

Further, the second body is provided with a guide groove relative to the wall of the first body, the first body is fixedly provided with a guide block relative to the wall of the second body, the guide block is arranged in the guide groove, the guide groove slides on the guide block, the sensing induction unit is positioned on the second body in the guide groove, and the sensing induction unit is positioned at two ends of the guide groove.

Further, a through hole penetrating through the wall is formed in the first pipe body, the through hole is arranged above the guide groove, and the through hole is used for accommodating the sensor.

Further, the sensor is an infrared sensor, a proximity sensor or an in-place detection sensor.

Further, the sensing induction unit is a limiting groove.

Further, the through hole is arranged on one side of the guide block.

Further, the driving mechanism comprises a rotating body and a connecting assembly, the second pipe body is provided with threads relative to the wall of the first pipe body, and the driving mechanism is in transmission connection with the threads on the second pipe body; 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 axially fixing the rotating body and the first pipe body relatively, and the rotating body can rotate around the rotating 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 driving mechanism further includes: a power source for driving the rotating body to rotate about its own rotation center.

Further, comprising: the device comprises a control unit, a first pipe body, a second pipe body, a brake unit, a torque sensor and a driving mechanism;

the first tube body and the second tube body are mutually nested in a sliding mode, the second tube body is arranged at one end of the first tube body in a telescopic mode, the driving mechanism is arranged on the first tube body, and the driving mechanism is used for driving the second tube body to stretch and retract relative to the first tube body; the control unit is electrically connected with the driving mechanism, and the torsion sensor is arranged in the driving mechanism and used for acquiring the driving force of the driving mechanism;

the second pipe body is provided with a guide groove relative to the wall of the first pipe body, the wall of the first pipe body relative to the second pipe body is fixedly provided with a guide block, the guide block is arranged in the guide groove, and the guide groove slides on the guide block;

the braking units are arranged at two ends of the guide groove and used for blocking the guide block to prevent the guide block from sliding out of the guide groove.

Different from the prior art, in the technical scheme, the through hole, the sensor, the guide block, the guide groove and the plurality of sensing units are arranged to prevent the second pipe body from being over-positioned when being extended or retracted; further prevent the second body from coming off from the first body, or prevent the first body from being damaged.

Drawings

FIG. 1 is a view of a first section of the first and second tubes;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a second section of the first and second tubes;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is a cross-sectional view of the second tubular body;

FIG. 6 is a cross-sectional view of the first and second tubes;

FIG. 7 is an isometric view of the second tubular body;

FIG. 8 is a block diagram of the fire fighting truck;

FIG. 9 is a schematic block diagram of the first and second tubes;

fig. 10 is a schematic block diagram of the power source.

Description of reference numerals:

1. a first pipe body;

10. a guide block;

11. a through hole;

12. a sensor;

2. a second tube body;

20. a guide groove;

21. a brake unit;

22. a sensing unit;

3. a drive mechanism;

30. a rotating body;

31. a power source;

311. rotating the worm gear;

312. a worm;

32. 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 8, the present application provides an anti-drop device for a boom of a fluid delivery device, including a sensor 12, a control unit, a sensing unit 22, a first tube 1, a second tube 2, and a driving mechanism 3; the first tube body 1 and the second tube body 2 are nested in a sliding mode, the second tube body 2 is arranged at one end of the first tube body 1 in a telescopic mode, the driving mechanism 3 is arranged on the first tube body 1, and the driving mechanism 3 is used for driving the second tube body 2 to stretch and retract relative to the first tube body 1; the control unit is electrically connected with the driving mechanism 3 and the sensor 12; the sensor 12 is arranged on the first pipe body 1; the sensing units 22 are positioned at two ends of the second pipe body 2; the sensor 12 is used for sensing the sensing unit 22; when the sensor 12 faces one of the sensing units 22, the control unit drives the driving mechanism 3 to stop when the sensor 12 detects the sensing unit 22.

In the present application, the second pipe 2 is disposed in the first pipe 1, but the first pipe 1 may be disposed in the second pipe 2, and the applicant takes the example of disposing the second pipe 2 in the first pipe 1 as an example.

The sensing units 22 are disposed at two ends of the second pipe body 2, and when the sensor 12 senses any one of the sensing units 22, a signal detected by the sensing unit 22 is sent to the control unit, and the control unit controls the driving mechanism 3 to stop driving the second pipe body 2.

In this embodiment, the second tube 2 is provided with a guide groove 20 on the wall of the first tube 1, the first tube 1 is fixedly provided with a guide block 10 on the wall of the second tube 2, the guide block 10 is disposed in the guide groove 20, the guide groove 20 slides on the guide block 10, the sensing unit 22 is disposed on the second tube 2 in the guide groove 20, and the sensing unit 22 is disposed at two ends of the guide groove 20.

It should be noted that the guide groove 20 may be formed on a side wall of the first tube 1 opposite to the second tube 2, and of course, the guide groove 20 may also be formed on a side wall of the second tube 2 opposite to the first tube 1.

In this embodiment, the first pipe 1 is provided with a through hole 11 penetrating through the wall, the through hole 11 is disposed above the guide groove 20, and the through hole 11 is used for accommodating the sensor 12.

It should be noted that the sensing units 22 are disposed at the bottom of the guide slot 20, and the sensing units 22 are disposed at two ends of the guide slot 20, so that when the guide slot 20 slides along the guide block 10, the sensing units 22 do not contact the guide block 10. The first pipe body 1 and the second pipe body 2 are coaxially arranged, and the guide groove 20 is parallel to the axis of the first pipe body 1. The through hole 11 is used for accommodating the sensor 12.

It should be further noted that, referring to fig. 6, when the second tube 2 extends out of the first tube 1, the through hole 11 is always disposed above the guide groove 20; at this time, the sensor 12 continuously senses the change of the guide groove 20, and when any one of the sensing units 22 is sensed, the sensor 12 sends a signal to the control unit, and the control unit drives the driving unit to stop working, so as to prevent the second pipe body 2 from continuously extending or retracting.

When the second pipe 2 extends from the first pipe 1 for a certain length and reaches a maximum length, if the second pipe 2 continues to extend, the second pipe 2 has a risk of being separated from the first pipe 1; therefore, when the second pipe 2 extends from the first pipe 1 and the second pipe 2 reaches the maximum length, the control unit drives the driving mechanism 3 to stop working, and prevents the second pipe 2 from extending continuously. Further, when the second pipe 2 is retracted and the end of the second pipe 2 is disposed at the end of the first pipe 1, the control unit drives the driving mechanism 3 to stop working, so as to prevent the second pipe 2 from being retracted continuously. The telescopic end of the first pipe body 1 is the end of the first pipe body 1 for the second pipe body 2 to enter and exit, the telescopic end of the first pipe body 1 is the front end of the first pipe body 1, and the other end of the first pipe body 1 is the tail end of the first pipe body 1; when the second pipe 2 extends to the maximum length, the tail end of the second pipe 2 is arranged at the front end of the first pipe 1.

Therefore, in the present application, when the second pipe 2 is extended to the maximum length, that is, the sensing unit 22 at the end of the second pipe 2 is disposed below the through hole 11; the sensor 12 located in the through hole 11 senses the sensing unit 22 and sends a signal to the control unit, and the control unit drives the driving mechanism 3 to stop working, so that the second pipe body 2 stops extending. Similarly, when the end of the second tube 2 is disposed at the end of the first tube 1, the sensing unit 22 at the front end of the second tube 2 is disposed below the through hole 11; the sensor 12 in the through hole 11 senses the sensing unit 22 and sends a signal to the control unit, and the control unit drives the driving mechanism 3 to stop working, so that the second pipe body 2 stops being recovered.

Further, the sensing units 22 at two ends are used for preventing the second tube 2 from being pulled out of the first tube 1, that is, when the first preset position is that the second tube 2 is at the maximum extension length, the second tube 2 stops extending; and meanwhile, when the second pipe body is prevented from being retracted to the bottom of the first pipe body, the driving mechanism continues to operate.

In the above technical solution, the through hole 11, the sensor 12, the guide block 10, the guide groove 20 and the plurality of sensing units 22 are arranged to prevent the second pipe body 2 from being over-positioned when being extended or retracted; further, the second pipe 2 is prevented from falling off from the first pipe 1, or the first pipe 1 is prevented from being damaged.

In some embodiments, the fire fighting truck has multiple stages of pipes, and the application takes two pipes as an example, it should be noted that the first pipe 1 is an outer pipe, the second pipe 2 is an inner pipe, and the outer pipe is sleeved on the inner pipe. The second body 2 also has a guide block 10 on its inner wall, and the first body 1 may also have a guide groove 20 and a thread on its outer wall.

In the present embodiment, the sensor 12 is an infrared sensor 12, a proximity sensor 12, or a position detection sensor 12. It should be noted that a sensing device corresponding to the infrared sensor 12, the proximity sensor 12 or the in-place detection sensor 12 is arranged in the sensing unit 22; when the infrared sensor 12, the proximity sensor 12 or the in-place detection sensor 12 senses a corresponding sensing device, a signal is sent to the control unit, the control unit drives the driving unit to stop working, and at this time, the second pipe body 2 stops.

Specifically, when the second pipe 2 does not extend out of the first pipe 1, the second pipe 2 is placed in the first pipe 1, and the sensor 12 faces the sensing unit 22 at the front end of the guide groove 20. When the second pipe body 2 extends out of the first pipe body 1, the sensor 12 senses that the distance between the second pipe body and the bottom of the guide groove is a specified distance, and the driving mechanism 3 works normally; when the distance sensed by the sensor 12 is again greater or less than the predetermined distance, the second tubular body 2 is set to the maximum extension length, and the driving mechanism 3 stops operating. In actual use, when the sensor 12 detects that the distance changes, the sensor 12 sends a signal to the control unit, and the control unit drives the driving mechanism 3 to stop working.

Referring to fig. 2 and 4, in the present embodiment, the sensing unit 22 is a limiting groove. It should be noted that the groove bottom of the limiting groove is lower than the groove bottom of the guide groove 20, that is, when the guide groove 20 moves along the guide block 10, the guide block 10 is placed on the limiting groove from above

Of course, in other embodiments, the position-limiting protrusion of the sensing unit 22 is also disposed on the guide slot 20, and the upper surface of the position-limiting protrusion is disposed between a side surface of the guide block 10 away from the first tube 1 and the bottom surface of the guide slot 20; that is, when the sensing unit 22 is a limit protrusion and the guide block 10 slides in the guide groove 20, the limit protrusion does not contact with the guide block 10.

Referring to fig. 5, in the present embodiment, the through hole 11 is disposed at one side of the guide block 10. In order to increase the extending length of the second tube 2, it should be noted that the guide block 10 is disposed on the telescopic end of the first tube 1, and the through hole 11 is disposed on a side of the guide block 10 away from the telescopic end of the first tube 1. The guide block 10 improves the extension length of the second pipe body 2 and the overall length of the arm support of the fire fighting truck.

Referring to fig. 7, the present application further provides a boom limiting device in a fluid conveying device; the braking units 21 are disposed at both ends of the guide groove 20, and the braking units 21 are used for blocking the guide block 10 from being powered by the hydraulic motor in the driving mechanism 3. It should be noted that the braking units 21 are disposed at two ends of the second pipe 2, that is, when the second pipe 2 extends to the maximum length, the braking units 21 contact the guide blocks 10; at this time, the braking unit 21 blocks the guide groove 20 from further moving, and preferably, the braking unit 21 is disposed at the end of the second tube 2 and is located in the guide groove 20. Similarly, when the second tube 2 is retracted inward, the brake unit 21 at the other end will block the guide groove 20 from further moving,

specifically, when the end of the second tube 2 moves to the front end of the first tube 1, the guide block 10 at the front end of the first tube 1 is caught by the braking unit 21, and at this time, the second tube 2 cannot move forward any more. Meanwhile, as the second pipe 2 is stuck and the driving mechanism 3 continues to operate, the torque value of the driving mechanism 3 (collected by a torque sensor or a torque sensor, which may be implemented by a pressure sensor of a hydraulic hose in some embodiments) will be too large, and the pressure in a hydraulic pipeline connected to the driving mechanism 3 will become large, and the control unit detects the change of the torque value or the pressure value and drives the driving mechanism 3 to stop operating.

Referring to fig. 6 to 7, in this embodiment, the driving mechanism 3 includes a rotating body 30 and a connecting assembly, the rotating body 30 is provided with a thread, the thread of the rotating body 30 is a force transmission screw, the thread of the second pipe 2 is matched with the thread of the rotating body 30, the connecting assembly is used for axially fixing the rotating body 30 and the first pipe 1 relatively, and the rotating body 30 can rotate around its own rotation center; wherein the rotating body 30 is configured such that when the rotating body 30 rotates around its own rotation center, the thread of the rotating body 30 and the thread of the second pipe 2 perform an engagement motion, and an axial driving force is applied to the second pipe 2 by the engagement motion of the threads with each other, so that the second pipe 2 performs an axial relative motion with respect to the first pipe 1. The drive mechanism 3 further includes: a power source 31, the power source 31 being for driving the rotating body 30 to rotate about its own rotation center. The power source 31 is a rotary worm wheel 311 and a worm 312, the worm 312 is disposed at one side of the rotary worm wheel 311, the rotary worm wheel 311 is fixedly connected with the rotary body 30, and the worm 312 is engaged with the rotary worm wheel 311.

The rotating body 30 is a rotating nut, and an internal thread is provided on the rotating nut, and the rotating nut is provided on the second pipe 2 by matching the internal thread with the external thread of the second pipe 2. The swivel nut is sleeved on the second pipe body 2 through the matching of the swivel nut internal thread and the second pipe body 2 external thread, and the second pipe body 2 can be controlled to stretch in the first pipe body 1 as long as the swivel nut can be driven to rotate.

Referring to fig. 9 to 10, it should be further noted that the power source 31 is disposed on one side of the rotating body 30, and the power source 31 is used for driving the rotating body 30 to rotate. The power source 31 includes a rotary worm wheel 311 and a worm 312, the worm 312 is disposed on one side of the rotary worm wheel 311, the rotary worm wheel 311 is fixedly connected with a rotary nut, and the worm 312 is engaged with the rotary worm wheel 311. At this time, by the cooperation of the worm wheel and the worm 312, 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 312 speed reducer, and a large torque is obtained, so that the rotation of the rotary nut is conveniently driven. In other embodiments, the rotating worm wheel 311 and worm 312 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 311 and the worm 312 may be replaced by a rotating friction disc and a friction wheel, the friction wheel is arranged at 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. 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 also be noted that the worm 312, gears or friction wheels are powered by any one of a hydraulic motor, a pneumatic motor, and an electric motor. In some embodiments, the driving mechanism 3 further comprises a cover for covering the driving mechanism 3. At this time, the cover is used for dust-proof and water-proof of the drive mechanism 3.

The connecting assembly comprises a bearing 32, one side of the bearing 32 is fixedly connected with the axial position of the first pipe body 1, and the other side of the bearing 32 movably supports the rotating body 30.

In practical use, the driving mechanism 3 is used as follows: the power source 31 is started, the power source 31 drives the worm 312 to rotate, the worm 312 drives the rotary worm wheel 311 to rotate, the rotary worm wheel 311 drives the rotary body 30 to rotate, and therefore the second pipe body 2 stretches in the first pipe body 1, and then the liquid is conveyed in the first pipe body 1, and therefore fire extinguishing is conducted on fire points. After the fire extinguishing is finished, the worm 312 is driven to rotate by the power source 31, the second pipe body 2 is retracted, and the operation is finished.

In some embodiments, the driving mechanism 3 includes a connecting assembly for axially fixing the rotating body 30 and the first pipe body 1 relative to each other. The connecting assembly comprises a bearing 32, one side of the bearing 32 is fixedly connected with the axial position of the first pipe body 1, and the other side of the bearing 32 movably supports the rotating body 30.

It should be further noted that, two anti-drop systems are both used for preventing the second pipe 2 from dropping out of the first pipe 1 (the boom stop device in the fluid conveying device and the boom anti-drop device in the fluid conveying device), and the two anti-drop systems can be used together, and the first of the two anti-drop systems prevents the second pipe 2 from dropping out through the arrangement of the sensor 12 and the sensing unit 22; which prevents the second tubular body 2 from coming out by the provision of the braking unit 21. In actual operation, the two sets of anti-falling systems simultaneously detect over-position signal points; however, when the second pipe body 2 extends out of the first pipe body 1 and the second pipe body cannot detect a signal point at the same time, any one of the two sets of anti-falling systems detects an over-position signal first, and the second pipe body 2 stops extending.

Namely, the boom limiting device in the fluid conveying device and the boom anti-falling device in the fluid conveying device can be used together in the same boom.

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 (8)

1. An arm support anti-drop device in a fluid conveying device is characterized by comprising: the device comprises a sensor, a control unit, a sensing unit, a first pipe body, a second pipe body and a driving mechanism;

the first tube body and the second tube body are mutually nested in a sliding mode, the second tube body is arranged at one end of the first tube body in a telescopic mode, the driving mechanism is arranged on the first tube body, and the driving mechanism is used for driving the second tube body to stretch and retract relative to the first tube body; the control unit is electrically connected with the driving mechanism and the sensor;

the sensor is arranged on the first pipe body; the sensing induction units are positioned at two ends of the second pipe body; the sensor is used for sensing the sensing unit.

2. The boom anti-drop device of claim 1, wherein the second tube has a guide groove formed on a wall thereof opposite to the first tube, the first tube has a guide block fixedly formed on a wall thereof opposite to the second tube, the guide block is disposed in the guide groove, the guide groove slides on the guide block, the sensing unit is disposed in the guide groove of the second tube, and the sensing unit is disposed at two ends of the guide groove.

3. The boom anti-drop device in a fluid conveying device as claimed in claim 2, wherein a through hole penetrating through the wall is formed in the first pipe body, the through hole is disposed above the guide groove, and the through hole is used for accommodating the sensor.

4. The boom anti-drop device in the fluid conveying device according to claim 1, wherein the sensor is an infrared sensor, a proximity sensor or an in-place detection sensor.

5. The device for preventing the boom from falling off in the fluid conveying device as claimed in claim 1, wherein the sensing unit is a limiting groove.

6. The device of claim 3, wherein the through hole is disposed at one side of the guide block.

7. The boom anti-drop device in a fluid conveying device according to claim 1, wherein the driving mechanism comprises a rotating body and a connecting assembly, the second pipe is provided with threads relative to the wall of the first pipe, and the driving mechanism is in transmission connection with the threads on the second pipe; 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 axially fixing the rotating body and the first pipe body relatively, and the rotating body can rotate around the rotating 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.

8. The device of claim 7, wherein the driving mechanism further comprises: a power source for driving the rotating body to rotate about its own rotation center.

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