Airbag type pulling trolley

Abstract

An airbag type pulling trolley, comprising a frame, the frame includes a load platform, an airbag located between four support legs is arranged below the middle of the load platform, a number of support rollers are arranged on the bottom of the load platform and the inner sides of the support legs, a high-pressure gas main pipeline penetrates through the load platform, a high-pressure gas interface is arranged at the end of the high-pressure gas main pipeline, the high-pressure gas main pipeline is rotationally and hermetically connected with a charging and discharging interface through a hose, and a towing seat is arranged at the end of the frame. The beneficial effects of the present invention are as follows: By the principle that the airbag rolls under tension after being inflated, the pulling and transporting of heavy loads are realized. The design of using walking wheels can reduce the risk of the trolley suddenly bottoming out, improve the stability and safety of use. The use of a pneumatic control valve can avoid the problem of repeated charging and discharging of gas, improve the use efficiency of the airbag, and extend the service life of the airbag.

Description

Technical Field

[0001] The present invention relates to an airbag type pulling trolley. Background Art

[0002] Currently, during the process of moving caisson concrete components in port terminals and transporting them onto ships, the components are usually moved by the method of first jacking them up with airbags and then pulling them. During use, the heavy object is first jacked up a certain height from the bottom by airbags, and then many non-inflated rolling airbags are placed at the bottom. After all the rolling airbags are inflated, the heavy object is jacked up a certain height, and then the heavy object is pulled in a certain direction. Then, the rolling airbags at the bottom act like "rollers" to carry out the pulling and transporting of the heavy object.

[0003] In practical applications, there are two problems: First, the problem of repeated inflation and deflation. Before moving the heavy object, it is necessary to arrange non-inflated rolling airbags in advance in the walking path direction. When the edge of the heavy object reaches the airbag, it is inflated. As the heavy object moves, the rolling airbag gradually rolls to the end of the heavy object, then deflates, and then moves to the front of the advancing direction. The above steps are repeated. Generally, at least more than 3 spare airbags are prepared, and there is an operation of repeated inflation and deflation. Even if more spare airbags are arranged, the airbags are still inflated one by one during rolling.

[0004] Second, there is the risk problem. It often happens that because the pressure of one airbag is too high, it bursts, which causes the stress on other airbags to increase and the internal pressure to rise. If a second airbag bursts again, it will inevitably cause the internal pressure of the remaining airbags to further increase. In this way, a chain reaction is caused, and many airbags burst, and finally the heavy object directly falls to the ground, resulting in a fatal "bottoming" engineering accident, and the heavy object cannot be moved and transported. Summary of the Invention

[0005] To solve the above technical deficiencies, the present invention provides an airbag type pulling trolley, which avoids the problem of repeated inflation and deflation, reduces the bottoming risk, and improves safety.

[0006] The present invention is achieved by the following measures:

[0007] An airbag type pulling trolley, comprising a frame. The frame includes a rectangular load platform. At each of the four corners of the load platform, there are support legs extending vertically downward. At the bottom of the support legs, there are walking wheels. Below the middle of the load platform, there is an airbag located between the four support legs. On both the bottom of the load platform and the inner side of the support legs, there are several support rollers that rollingly contact the airbag. A high-pressure gas main pipeline runs through the load platform. At the end of the high-pressure gas main pipeline, there is a high-pressure gas interface for connecting to an external high-pressure gas source. At the end of the airbag, there is an air charging and discharging interface. The high-pressure gas main pipeline is rotationally and sealingly connected to the air charging and discharging interface through a hose. At the end of the frame, there is a towing seat.

[0008] The extending direction of the above-mentioned support rollers is perpendicular to the direction in which the airbag rolls forward. And the support rollers include upper support rollers and transverse support rollers. The upper support rollers are arranged at the bottom of the load platform, and the bottom of the upper support rollers rollingly contacts the top of the airbag. The transverse support rollers are arranged between two support legs, and the transverse support rollers rollingly contact the end of the airbag.

[0009] In the middle of the above-mentioned high-pressure gas main pipeline, there is a pneumatic pressure control valve. At the air charging and discharging interface, there is a rotary sealing valve. The hose connects the pneumatic pressure control valve and the rotary sealing valve.

[0010] Between the bottom of the above-mentioned load platform and the inner side wall of the support leg, there is an arc transition. On the frame, there is a pneumatic pressing cylinder. At the end of the pneumatic pressing cylinder, there is a rotary-connected speed wheel for measuring the rolling speed of the airbag. The speed wheel rolls and presses on the surface of the airbag, and the speed wheel is signal-connected to a speed sensor.

[0011] At the bottom of the above-mentioned frame, there is a height sensor. The height sensor is signal-connected to a controller, and the controller is signal-connected to the pneumatic pressure control valve.

[0012] At both ends of the above-mentioned support rollers, there are side support seats rotatably connected through bearings. In the middle of the support rollers, there is an intermediate support seat rotatably connected through a bearing. The side support seats and the intermediate support seats are fixed on the frame.

[0013] The above-mentioned several frames are arranged side by side front and back. The towing seats of adjacent two frames are connected through a connecting plate. The high-pressure gas interfaces of adjacent two frames are connected through a high-pressure gas hose. In front of the frame, there is a winch. The winch is connected to the towing seat of the foremost frame through a steel wire rope.

[0014] The beneficial effects of the present invention are as follows: reasonable design. By the principle that the airbag rolls under the action of tension after being inflated, the pulling and transportation of heavy loads are realized. The design of using walking wheels can reduce the risk of the trolley suddenly sitting on the bottom, improving the stability and safety of use. The use of a pneumatic pressure control valve can avoid the problem of repeated air charging and discharging, improving the use efficiency of the airbag and prolonging the service life of the airbag. Description of the Drawings

[0015] Figure 1 This is the front view structural schematic diagram of the present invention.

[0016] Figure 2 This is the right view structural schematic diagram of the present invention.

[0017] Figure 3 This is the structural schematic diagram of the combined state of several frames of the present invention.

[0018] Wherein: 1 - airbag, 2 - walking wheel, 3 - height sensor, 4 - towing seat, 5 - horizontal support roller, 6 - speed wheel, 7 - speed sensor, 8 - high-pressure gas interface, 9 - speed cable, 10 - pneumatic pressing cylinder, 11 - air pipe, 12 - high-pressure gas main pipeline, 13 - frame, 14 - upper support roller, 15 - pneumatic pressure control valve, 14-1 side support seat, 14-2 bearing, 14-4 intermediate support seat, 16 - hose, 17 - rotary seal valve, 20 - load, 21 - steel wire rope, 22 - winch, 23 - pulley block, 24 - connecting plate, 25 - high-pressure gas hose, 26 - speed sensor cable. Specific embodiments

[0019] The present invention will be further described in detail below with reference to the accompanying drawings:

[0020] As shown in Figure 1 , 2 , and 3, an airbag 1 type pulling trolley includes a frame 13. The frame 13 includes a rectangular load platform. Support legs vertically extend downward from the four corners of the load platform. Walking wheels 2 are provided at the bottoms of the support legs. An airbag 1 is provided below the middle of the load platform and between the four support legs. A number of support rollers in rolling contact with the airbag 1 are provided at the bottom of the load platform and inside the support legs. A high-pressure gas main pipeline 12 penetrates through the load platform. A high-pressure gas interface 8 for connecting to an external high-pressure gas source is provided at the end of the high-pressure gas main pipeline 12. An air charging and discharging interface is provided at the end of the airbag 1. The high-pressure gas main pipeline 12 is rotatably and hermetically connected to the air charging and discharging interface through a hose 16. A towing seat 4 is provided at the end of the frame 13.

[0021] The extending direction of the support roller is perpendicular to the rolling forward direction of the airbag 1. The support roller includes an upper support roller 14 and a transverse support roller 5. The upper support roller 14 is arranged at the bottom of the load platform, and the bottom of the upper support roller 14 is in rolling contact with the top of the airbag 1. The transverse support roller 5 is arranged between two support legs, and the transverse support roller 5 is in rolling contact with the end of the airbag 1. A pneumatic pressure control valve 15 is arranged in the middle of the high-pressure gas main pipeline 12, and a rotary seal valve 17 is arranged at the air charging and discharging interface. The hose 16 connects the pneumatic pressure control valve 15 and the rotary seal valve 17. There is an arc transition between the bottom of the load platform and the inner side wall of the support leg. An air-operated pressing cylinder 10 is arranged on the frame 13. A rotating speed wheel 6 for measuring the rolling speed of the airbag 1 is rotatably connected to the end of the air-operated pressing cylinder 10. The rotating speed wheel 6 is in rolling contact with the surface of the airbag 1, and the rotating speed wheel 6 is signal-connected to a rotating speed sensor 7.

[0022] A height sensor 3 is arranged at the bottom of the frame 13. The height sensor 3 is signal-connected to a controller, and the controller is signal-connected to the pneumatic pressure control valve 15. Both ends of the support roller are rotatably connected to side support seats 14-1 through bearings 14-2, and the middle of the support roller is rotatably connected to an intermediate support seat 14-4 through a bearing 14-2. The side support seats 14-1 and the intermediate support seat 14-4 are fixed on the frame 13. A plurality of frames 13 are arranged side by side in the front and rear. The towing seats 4 of two adjacent frames 13 are connected through a connecting plate 24. The high-pressure gas interfaces 8 of two adjacent frames 13 are connected through a high-pressure gas hose 25. A winch 22 is arranged in front of the frame 13, and the winch 22 is connected to the towing seat 4 of the foremost frame 13 through a steel wire rope 21.

[0023] Its working principle is as follows: The airbag 1 is installed under the frame 13. The contact and rolling between the frame 13 and the airbag 1 pass through the upper support roller. When the airbag 1 rolls along the circumferential direction, the roller of the upper support roller rolls on the outer wall of the airbag 1 while bearing the weight of the upper part. To solve the problem of avoiding repeated inflation and deflation, a pneumatic control valve 15 is provided in the middle of the high-pressure gas main pipeline 12, and a rotary seal valve 17 is installed at the inflation and deflation interfaces at both ends of the airbag 1. The two are connected through a high-pressure gas hose 25. When the airbag 1 moves, the airbag 1 rolls and rotates to drive the nozzle to rotate, while the rotary seal valve 17 remains stationary and realizes the connection of high-pressure gas at the same time. In this way, the airbag 1 does not need to be inflated and deflated repeatedly. To reduce the risk of the heavy object sitting on the bottom, traveling wheels 2 are installed on both sides of the frame 13. When the lifting height of the airbag 1 is lower than the frame 13 or the airbag 1 bursts accidentally, the traveling wheels 2 of the trolley support the trolley and the heavy object on the upper part, so that the heavy object will not sit on the bottom. Other lifting methods can be adopted to restore the lifting space or directly tow the trolley to the designated position for processing. To ensure the driving force of the airbag 1 on the frame 13 during the forward and backward rolling process, a transverse support roller 5 is installed in the front and back directions of the airbag 1. When the airbag 1 rolls, the outer wall of the airbag 1 presses against the roller, thereby driving the frame 13 to move. To ensure the movement synchronization between each frame 13, it is necessary to measure the moving speed of the airbag 1. A speed wheel 6 is installed. The speed wheel is installed at the end of the pneumatic telescopic cylinder, and its gas power source is realized through the trachea 11 from the main pipeline. The pneumatic telescopic cylinder ensures that the speed wheel 6 always presses on the outer wall of the airbag 1 and measures its rotational speed as the airbag 1 rolls, and then transmits the signal to the speed sensor 7 through the speed cable 9, so as to realize the measurement and matching of the speeds of each trolley. To achieve the unity of the lifting force of each trolley, the lifting height of the trolley is measured by the height sensor 3. When the trolley is lower than the set height value, the height sensor 3 sends a signal to the control system. The control system controls the pneumatic control valve 15 to inflate the airbag 1, the pressure increases, and the lifting force increases, so as to gradually lift the lifting height to the set height value standard. On the contrary, the airbag 1 deflates to lower the height of the trolley. These operations are all automatically controlled through the electrical system. To realize the connection between the trolleys, the towing seats 4 before and after each trolley can be connected through the connecting plate 24. At the same time, the air circuit and cables are connected through the high-pressure gas hose 25 and the speed sensor cable 26 to realize modular control. The heavy load 20 is placed on the top of the connected multiple trolleys. The winch 22 is connected to the towing seat 4 of the frontmost frame 13 through the pulley block 23 and the steel wire rope 21. The winch 22 provides power to drive the trolley to move forward.

[0024] The above are only the preferred embodiments of this patent. It should be noted that for those of ordinary skill in the art, without departing from the principle of this patented technology, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of this patent.

Claims

1. An airbag type pulling trolley, characterized in that: It includes a frame which comprises a rectangular load platform. Four corners of the load platform vertically extend downward with support legs, and walking wheels are arranged at the bottoms of the support legs. An airbag located between the four support legs is arranged below the middle of the load platform. A number of support rollers which are in rolling contact with the airbag are arranged on the bottom of the load platform and the inner sides of the support legs. A high-pressure gas main pipeline penetrates through the load platform. A high-pressure gas interface connected to an external high-pressure gas source is arranged at the end of the high-pressure gas main pipeline. An air charging and discharging interface is arranged at the end of the airbag. The high-pressure gas main pipeline is rotationally and hermetically connected to the air charging and discharging interface through a hose. A towing seat is arranged at the end of the frame; the extending direction of the support rollers is perpendicular to the rolling advancing direction of the airbag, and the support rollers include upper support rollers and transverse support rollers. The upper support rollers are arranged at the bottom of the load platform, and the bottoms of the upper support rollers are in rolling contact with the tops of the airbag. The transverse support rollers are arranged between the two support legs, and the transverse support rollers are in rolling contact with the ends of the airbag; a pneumatic pressure control valve is arranged in the middle of the high-pressure gas main pipeline, and a rotary seal valve is arranged at the air charging and discharging interface. The hose connects the pneumatic pressure control valve and the rotary seal valve; an arc transition is arranged between the bottom of the load platform and the inner side wall of the support leg. A pneumatic pressing cylinder is arranged on the frame. A rotating speed wheel for measuring the rolling speed of the airbag is rotatably connected to the end of the pneumatic pressing cylinder. The rotating speed wheel is tightly pressed on the surface of the airbag, and the rotating speed wheel is signal-connected to a rotating speed sensor.

2. The airbag type pulling trolley according to claim 1, wherein: A height sensor is arranged at the bottom of the frame. The height sensor is signal-connected to a controller, and the controller is signal-connected to the pneumatic pressure control valve.

3. The airbag type pulling trolley according to claim 1, characterized in that: Both ends of the support roller are rotationally connected with side support seats through bearings, and the middle of the support roller is rotationally connected with a middle support seat through a bearing. The side support seats and the middle support seat are fixed on the frame.

4. The airbag type pulling trolley according to claim 1, characterized in that: A number of frames are arranged side by side front and back. The towing seats of two adjacent frames are connected through a connecting plate. The high-pressure gas interfaces of two adjacent frames are connected through a high-pressure gas hose. A winch is arranged in front of the frames. The winch is connected to the towing seat of the foremost frame through a steel wire rope.

Images