Coil pipe assembly and watering vehicle with same

Abstract

The utility model discloses a coil pipe assembly and a watering vehicle with the same, the coil pipe assembly comprises a pipe coil, a pipe extending device and a positioning device, the pipe coil is provided with a bottom surface for winding a pipe, the pipe extending device forms a pipe passing channel, and the pipe wound on the bottom surface of the pipe coil passes through the pipe passing channel; the positioning device is located opposite to the bottom face of the pipe disc and fixedly connected with the pipe extending device, and the positioning device is used for driving the pipe extending device to move from the first side to the second side of the bottom face and move from the second side to the first side. Compared with the prior art, the coil pipe assembly has the advantages that the pipe extending device is driven by the positioning device to reciprocate between the first edge and the second edge of the bottom surface of the pipe coil, so that pipes can be sequentially wound on the second edge of the bottom surface of the pipe coil from the first edge of the bottom surface of the pipe coil, and then another layer is formed; the hose is wound from the second edge of the bottom face of the pipe disc to the first edge of the bottom face of the pipe disc in sequence, the operation is repeated in sequence till the hose is completely wound on the pipe disc, and the hose wound on the pipe disc can be neat.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery sprinkler irrigation equipment, specifically to a coil assembly and a watering truck having the same structure. Background Technology

[0002] With the acceleration of agricultural modernization in my country, improving land productivity, resource utilization, and labor productivity, as well as reducing production costs, has become crucial for agricultural development. Ensuring sufficient water is key to increasing crop yields. Under natural conditions, insufficient or uneven rainfall often fails to meet the water requirements of crops, necessitating artificial irrigation to supplement natural water shortages. Irrigation trucks are commonly used irrigation tools in modern agriculture. When irrigating crops, fixed water supply points are set up in the fields, supplying water to the irrigation trucks through pipes at these points. Because the irrigation truck moves between fields during irrigation, a water pipe is connected between the water supply point and the truck. The truck has a pipe coil for winding the pipe. When the truck is near the water supply point, the pipe is wound around the coil. As the truck moves from the end near the supply point to the end away, the pipe is gradually extended into the field behind the truck. When the truck moves backward, the pipe is wound around the coil again. Since fields are usually long, a long pipe is needed to supply water to the truck when moving from the end with the supply point to the other end. Therefore, the pipe is wound around the coil multiple times, and after each layer is full, another layer is added. However, winding the pipe by rotating the coil usually results in a messy and disorderly appearance. Utility Model Content

[0003] The purpose of this invention is to provide a coil assembly and a watering truck having the same structure, which solves the aforementioned technical problems.

[0004] A coil assembly, comprising:

[0005] A tube coil having a bottom surface for winding tubes, and the width of the bottom surface being at least greater than the length of two tube diameters;

[0006] A tube extension device, which forms a tube passage, through which the tube wound on the bottom surface of the tube coil passes;

[0007] A positioning device is located on the bottom surface of the tube tray and is fixedly connected to the tube extension device. The positioning device is used to move the tube extension device from the first side of the bottom surface to the second side, and from the second side to the first side.

[0008] According to one embodiment of the present invention, there are a first state and a second state. In the first state, the tube coil is in a tube-laying state, and the tube wound on the bottom surface of the tube coil moves outward through the tube passage of the tube extension device. The rotation direction of the tube coil is the tube-laying direction. In the second state, the tube coil is in a tube-retracting state, and the tube moves from the outside to the inside through the tube passage of the tube extension device and is wound on the tube coil. The rotation direction of the tube coil is the tube-retracting direction. In the first state and the second state, the rotation angle of the tube coil is proportional to the speed of movement of the positioning device.

[0009] According to one embodiment of the present invention, the positioning device includes a rotating shaft and a bushing that surrounds the rotating shaft. A tube extension device is connected to the bushing. An outer slide rail is provided on the outer surface of the rotating shaft. A structure adapted to the outer slide rail is provided inside the bushing. In a first state, the rotating shaft rotates in a first rotation direction adapted to the first state. In a second state, the rotating shaft rotates in a second rotation direction, which is opposite to the first rotation direction. In a unit time, the angle of rotation of the tube disc is proportional to the angle of rotation of the rotating shaft.

[0010] According to one embodiment of this utility model, the outer surface of the rotating shaft is provided with a working area of ​​an outer slide rail, the working area being adapted to the length of the bottom surface of the tube disc; the working area includes a first end and a second end, the first end and the second end being respectively corresponding to the first side and the second side of the bottom surface of the tube disc; so that when the bushing is located at the first end, the tube can be placed or retracted at the first side; when the bushing is located at the second end, the tube can be placed or retracted at the second side; in the first state, the rotating shaft rotates in a first rotation direction, and when the bushing moves to the second end, it is located at the end point of the working area, the bushing cooperating with the outer slide rail, so that... The bushing moves from the second end to the first end; the rotating shaft rotates in the first direction, and when the bushing moves to the first end, it is located at the end of the working area. The bushing cooperates with the outer slide rail, causing the bushing to move from the first end to the second end; in the second state, the rotating shaft rotates in the second rotation direction, and when the bushing moves to the second end, it is located at the end of the working area. The bushing cooperates with the outer slide rail, causing the bushing to move from the second end to the first end; the rotating shaft rotates in the second direction, and when the bushing moves to the first end, it is located at the end of the working area. The bushing cooperates with the outer slide rail, causing the bushing to move from the first end to the second end.

[0011] According to one embodiment of the present invention, the positioning device includes a motor, the motor is provided with a drive shaft, and the extension device is slidably connected to the drive shaft through a bushing. The motor changes the rotation direction of the drive shaft, thereby changing the movement direction of the tube extension device, so that the positioning device drives the tube extension device to reciprocate between the first side and the second side of the bottom surface.

[0012] According to one embodiment of the present invention, the device further includes a working area for the positioning device to operate. The first end of the working area corresponds to the first side of the bottom surface of the tube disk, and the second end of the working area corresponds to the second side of the bottom surface of the tube disk. A first sensor is provided at the first end, and a second sensor is provided at the second end. When the positioning device moves to the first end of the working area, the first sensor senses the positioning device and triggers a signal, causing the rotation direction of the motor to change and the movement direction of the positioning device to change. When the positioning device moves to the second end of the working area, the second sensor senses the positioning device and triggers a signal, causing the rotation direction of the motor to change and the movement direction of the positioning device to change.

[0013] A watering truck includes the aforementioned coil assembly and a wheel body, the angular velocity of which is proportional to the angular velocity of the coil rotation.

[0014] According to one embodiment of the present invention, the rotating shaft, the wheel body, and the tube disc are all driven by the same driving device and their rotation angles are proportional, while the rotation directions of the wheel body and the tube disc are opposite.

[0015] According to one embodiment of the present invention, the tube extension device is provided with a tube driving device and a movable tube pressing device. The tube driving device forms a first tube pressing surface that rotates autonomously. The movable tube pressing device is movably disposed on the opposite side of the first tube pressing surface and forms a second tube pressing surface. A tube passage is formed between the first tube pressing surface and the second tube pressing surface. The tube wound on the bottom surface of the tube coil passes through the tube passage.

[0016] According to one embodiment of the present invention, the tube driving device includes a driver and a rotating shaft. The rotating shaft has a first pressing surface. The driver is used to drive the rotating shaft to rotate when the tube is released from the tube coil. The rotating shaft is perpendicular to the direction of movement of the tube through the tube channel. The rotational linear velocity of the first pressing surface on the rotating shaft is 1.0-1.3 times the tube release speed of the tube coil.

[0017] Compared with the prior art, the coil assembly of this utility model, through the positioning device driving the tube extension device to move back and forth between the first and second sides of the bottom surface of the coil, can make the tube sequentially wound from the first side of the bottom surface of the coil to the second side of the bottom surface of the coil, and then start a new layer, and sequentially wound from the second side of the bottom surface of the coil to the first side of the bottom surface of the coil, and repeat in this way until the hose is completely wound on the coil, so that the tube wound on the coil is neat. Attached Figure Description

[0018] Figure 1 A schematic diagram showing the connection relationship and structure of the coil assembly with the wheel and drive device during the coiling process;

[0019] Figure 2 for Figure 1 Side view;

[0020] Figure 3 This is a schematic diagram showing the connection relationship and structure of the coil assembly with the wheel and drive unit during coil winding.

[0021] Figure 4 for Figure 3 Side view;

[0022] Figure 5 A schematic diagram of a watering truck with a pipe coil assembly;

[0023] In the diagram: 1. Tube disc, 2. Tube extension device, 21. Slide groove, 3. Positioning device, 31. Rotating shaft, 32. Bushing, 4. Wheel body, 5. Drive device, 51. Drive motor, 52. Output drive shaft, 53. Output sprocket, 54. Transmission gear, 55. Follower gear, 6. Tube drive device, 61. Driver, 62. Rotating shaft, 7. Movable tube pressing device

[0024] The implementation and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terminology and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] To further understand the content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0029] The coil assembly in this embodiment is designed and developed to allow the flexible hose to be neatly wound layer by layer on the bottom surface of the coil 1. Please refer to [link / reference]. Figure 1 The coil assembly of this embodiment includes a coil 1, a tube extension device 2, and a positioning device 3. The coil 1 has a bottom surface for winding the tube, and the width of the bottom surface is at least greater than the length of two tube diameters. The tube extension device 2 forms a tube passage, through which the tube wound on the bottom surface of the coil 1 passes. The positioning device 3 is located on the bottom surface of the coil 1 and is fixedly connected to the tube extension device 2. The positioning device 3 is used to drive the tube extension device 2 from the first side of the bottom surface to the second side, and from the second side to the first side. In other words, during the process of winding the tube onto the tube coil 1, the positioning device 3 drives the tube extension device 2 to move back and forth from the first side to the second side of the bottom surface of the tube coil 1. During the movement of the tube extension device 2, the tube extension device 2 guides the tube passing through the tube channel on it to start winding from the first side of the first layer of the bottom surface of the tube coil 1. After winding one turn, it winds a second turn immediately next to the first turn, until the first layer of tube is wound to the second side of the bottom surface of the tube coil 1. After reaching the second side, the tube starts to wind a second layer on the second side, and under the guidance of the tube extension device 2, it starts to wind from the second side of the bottom surface of the tube coil 1 to the first side. After winding one turn of the second layer, it winds a second turn immediately next to the first turn, until the second layer of tube is wound to the second side of the bottom surface of the tube coil 1. After reaching the second side, the tube starts to wind a third layer on the second side, and under the guidance of the tube extension device 2, it starts to wind from the second side of the bottom surface of the tube coil 1 to the first side. This process is repeated until all the tube is wound onto the bottom surface of the tube coil 1. During the process of winding the tube onto the bottom surface of the tube coil 1, the positioning device 3 drives the tube extension device 2 from the first side to the second side of the bottom surface of the tube coil 1, and from the second side to the first side. The tube extension device 2 guides the tube to wind sequentially in each layer, so that the tube can be neatly wound layer by layer on the bottom surface of the tube coil 1.

[0030] The coil assembly of this embodiment includes a first state and a second state. In the first state, the coil 1 is in the unwinding state, and the tube wound on the bottom surface of the coil 1 moves outward through the tube passage of the tube extension device 2. The rotation direction of the coil 1 is the unwinding direction. In the second state, the coil 1 is in the rewinding state, and the tube moves from the outside to the inside through the tube passage of the tube extension device 2 and is wound on the bottom surface of the coil 1. The rotation direction of the coil 1 is the rewinding direction. In the first and second states, the rotation angle of the coil 1 is proportional to the moving speed of the positioning device 3.

[0031] In actual use, the pipe wound on the bottom surface of the pipe coil 1 passes through the pipe channel and connects to the water supply point. When the irrigation truck is near the water supply point, the pipe is wound on the pipe coil 1. When the irrigation truck moves from the water supply point to the side away from the water supply point, the pipe coil 1 will rotate with the movement of the irrigation truck. During the rotation of the pipe coil 1, the pipe wound on the bottom surface of the pipe coil 1 will be released from the pipe coil 1 and laid on the field behind the irrigation truck. When the irrigation truck moves to the end of the field, that is, the side away from the water supply point, the irrigation truck will start to return from the side away from the water supply point to the side near the water supply point. When the irrigation truck returns from the side away from the water supply point to the side near the water supply point, the pipe coil 1 will rotate with the movement of the irrigation truck, and the rotation direction of the pipe coil 1 is opposite to the rotation direction when the irrigation truck moves away from the fixed water supply point, and the pipe laid on the field will be rewound onto the bottom surface of the pipe coil 1. In other words, in the first state, the irrigation truck moves from the end closest to the fixed water supply point to the end furthest from the fixed water supply point. At this time, the pipe coil 1 is in the pipe-laying state, and the pipe wound on the pipe coil 1 moves outward through the pipe passage of the pipe extension device 2 and is laid on the field behind the irrigation truck. At this time, the rotation direction of the pipe coil 1 is the pipe-laying direction, and the movement direction of the irrigation truck is the forward direction. In the second state, the irrigation truck moves from the end furthest from the water supply point to the end closest to the water supply point. The pipe coil 1 is in the pipe-retracting state, and the pipe moves from the outside to the inside through the pipe passage of the pipe extension device 2 and is wound on the bottom surface of the pipe coil 1. The rotation direction of the pipe coil 1 is the pipe-retracting direction, and the movement direction of the irrigation truck is the backward direction. Furthermore, when the tube is placed and retracted from the tube coil 1, the tube passes through the tube passage of the tube extension device 2. Therefore, when the tube is coiled around the tube coil 1 or placed around the tube coil 1, the positioning device 3 needs to move the tube extension device 2 just enough to cover the width of the tube winding around one end of the bottom surface of the tube coil 1 or placing the tube around the bottom surface once. The speed of placing or retracting the tube coil 1 is determined by the rotation speed of the tube coil 1, while the moving speed of the tube extension device 2 is determined by the moving speed of the positioning device 3. Therefore, in the first and second states, the rotation angle of the tube coil 1 is proportional to the moving speed of the positioning device 3.

[0032] Please see Figure 1 and Figure 3 In this embodiment, the positioning device 3 includes a rotating shaft 31 and a bushing 32 that surrounds the rotating shaft 31. A tube extension device 2 is connected to the bushing 32. An outer slide rail is provided on the outer surface of the rotating shaft 31, and a structure adapted to the outer slide rail is provided inside the bushing 32. In the first state, the rotating shaft 31 rotates in a first rotation direction adapted to the first state. In the second state, the rotating shaft 31 rotates in a second rotation direction, which is opposite to the first rotation direction. In a unit time, the angle of rotation of the tube disc 1 is proportional to the angle of rotation of the rotating shaft 31.

[0033] In other words, if the rotating shaft 31 rotates clockwise during tube feeding, the first layer of tube is wound clockwise on the bottom surface of the tube reel 1, starting from the first edge and moving towards the second edge; the second layer is wound clockwise, starting from the second edge and moving towards the first edge; the third layer is wound clockwise, starting from the first edge and moving towards the second edge; and so on. During tube feeding, the rotating shaft 31 rotates counterclockwise. If the last layer of tubes has an even number of layers, then when releasing the tubes, the last layer is released one loop at a time from the first edge to the second edge of the bottom surface of tube reel 1. The penultimate layer is released one loop at a time from the second edge to the first edge of the bottom surface of tube reel 1, and so on. In general, when retracting the tubes, for tubes with an even number of layers, the winding direction is clockwise, starting from the second edge to the first edge of the bottom surface of tube reel 1; for tubes with an odd number of layers, the winding direction is clockwise, starting from the first edge of the bottom surface of tube reel 1. The tubes are wound sequentially towards the second layer. When releasing the tubes, for tubes with an even number of layers, the tubes are released one turn at a time from the first side to the second side of the bottom surface of the tube disc 1. For tubes with an odd number of layers, the tubes are released one turn at a time from the second side to the first side of the bottom surface of the tube disc 1. However, in the first state, the rotating shaft 31 always rotates in the first rotation direction, and in the second state, the rotating shaft 31 always rotates in the second rotation direction. Therefore, when the positioning device 3 moves back and forth between the first and second sides of the tube disc 1 in the first and second states, it relies on the cooperation between the outer slide rail on the outer surface of the rotating shaft 31 and the structure inside the bushing 32 that is adapted to the outer slide rail. This structure causes the bushing 32 to change its sliding direction on the outer slide rail when it moves to one end of the outer slide rail, and to change its sliding direction again when it slides to the other end. The changing of the sliding direction of the bushing 32 at both ends of the outer slide rail changes the moving direction of the positioning device 3 and the tube extension device 2. Meanwhile, since the speed at which the tube is released or retrieved from the tube coil 1 is determined by the rotation speed of the tube coil 1, and the moving speed of the tube extension device 2 is determined by the moving speed of the positioning device 3, and the conveying speed of the positioning device 3 is determined by the rotation speed of the rotating shaft 31, the angle of rotation of the tube coil 1 per unit time is proportional to the angle of rotation of the rotating shaft 31. This ensures that when the tube is coiled around the tube coil 1 or released around the tube coil 1, the rotating shaft 31 drives the tube extension device 2 through the bushing 32 to move just enough distance to wrap the tube around one end of the bottom surface of the tube coil 1 or release the tube around one turn.

[0034] In this embodiment, the outer surface of the rotating shaft 31 is provided with a working area of ​​an outer slide rail, the working area being adapted to the length of the bottom surface of the tube disc 1; the working area includes a first end and a second end, the first end and the second end being respectively provided to correspond to the first side and the second side of the bottom surface of the tube disc 1; so that when the bushing 32 is located at the first end, the tube can be placed or retracted at the first side; when the bushing 32 is located at the second end, the tube can be placed or retracted at the second side; in the first state, the rotating shaft 31 rotates in a first rotation direction, and when the bushing 32 moves to the second end, it is located at the end point of the working area, the bushing 32 cooperates with the outer slide rail, so that the bushing 32 moves from the second end to the first end. In the first state, the rotating shaft 31 rotates in the first direction, and when the bushing 32 moves to the first end, it is located at the end of the working area. The bushing 32 cooperates with the outer slide rail, so that the bushing 32 moves from the first end to the second end. In the second state, the rotating shaft 31 rotates in the second rotation direction, and when the bushing 32 moves to the second end, it is located at the end of the working area. The bushing 32 cooperates with the outer slide rail, so that the bushing 32 moves from the second end to the first end. In the second state, the rotating shaft 31 rotates in the second direction, and when the bushing 32 moves to the first end, it is located at the end of the working area. The bushing 32 cooperates with the outer slide rail, so that the bushing 32 moves from the first end to the second end.

[0035] Because when winding the pipe from the first edge to the second edge of the bottom surface of the pipe coil 1, a new layer needs to be started when the pipe is wound onto the coil 1. Then, it needs to be wound from the second edge to the first edge. After reaching the first edge, another new layer needs to be started, and the process is repeated. Similarly, when releasing the pipe, after it is released from the first edge to the second edge of the bottom surface of the coil 1, a new layer needs to be started and released from the second edge to the first edge. After reaching the first edge, another new layer needs to be started and released from the first edge to the second edge, and so on. When the tube is being extended or retracted, the rotating shaft 31 drives the tube extension device 2 to reciprocate in the direction of extending or retracting the tube via the bushing 32. Therefore, when the tube is extended or retracted to the first side of the bottom surface of the tube coil 1, the bushing 32 on the outer slide rail of the rotating shaft 31 must also be moved to the end corresponding to the first side. When the tube is extended or retracted to the second side of the bottom surface of the tube coil 1, the bushing 32 on the outer slide rail of the rotating shaft 31 must also be moved to the end corresponding to the second side. The end of the outer slide rail corresponding to the first side is called the first end, and the end corresponding to the second side is called the second end. The corresponding end is called the second end. The area between the first end and the second end is the working area of ​​the outer slide rail. The length of this working area is adapted to the length of the bottom surface of the tube coil 1. Thus, when the tube coil is retracting or extending the tube to the first side of the bottom surface of the tube coil 1, the bushing 32 just drives the tube extension device 2 to slide on the outer slide rail of the rotating shaft 31 to the first end. The first end is the end point of the working area of ​​the outer slide rail. At this time, the structure inside the bushing 32 that adapts to the outer slide rail causes the movement direction of the bushing 32 on the outer slide rail to change. The bushing 32 begins to move from the working area of ​​the outer slide rail. As the first end of the area moves to the second end, the tube also begins to be retracted or extended from the first side of the bottom surface of the tube disc 1 to the second side. When the bushing 32 moves to the second end of the working area of ​​the outer slide rail, the tube disc 1 also retracts or extends the tube to the second side of the bottom surface of the tube disc 1. The second end is also the end point of the working area of ​​the outer slide rail. At this time, the structure inside the bushing 32 that is adapted to the outer slide rail causes the bushing 32 to change its direction of movement on the outer slide rail again. The bushing 32 then begins to drive the tube extension device 2 to move from the second end to the first end of the working area of ​​the outer slide rail, and so on. Since the rotating shaft 31 always rotates in the first direction in the first state and in the second direction in the second state, the positioning device 3 relies on the cooperation between the outer slide rail on the outer surface of the rotating shaft 31 and the structure inside the bushing 32 that is adapted to the outer slide rail when it moves back and forth between the first and second sides of the tube disc 1 in the first and second states. This structure causes the bushing 32 to change its sliding direction on the outer slide rail when it slides to one end of the outer slide rail, and to change its sliding direction again when it slides to the other end. The changing of the sliding direction of the bushing 32 at both ends of the outer slide rail changes the moving direction of the positioning device 3 and the tube extension device 2.

[0036] In this embodiment, the coil assembly uses a positioning device 3 to drive the tube extension device 2 to reciprocate between the first and second sides of the bottom surface of the coil 1. This ensures that during tube release, the tube is released from the first side to the second side of the bottom surface of the coil 1, and then from the second side to the first side, and so on. This prevents the tube from becoming loose on the coil 1 after one turn of release, and keeps the tube wound on the coil 1 neat and ready to be released throughout the entire tube release process. During tube retraction, the positioning device 3 also drives the tube extension device 2 to reciprocate between the first and second sides of the bottom surface of the coil 1, ensuring that each turn of tube in each layer on the coil 1 is neatly wound on the coil 1. One layer is wound, and another layer is started, until all the tube is wound on the coil 1, ensuring that the tube wound on the coil 1 is neat and tight.

[0037] This application also relates to a second type of tube coil assembly, which includes a tube coil 1, a tube extension device 2, and a positioning device 3. The structure and function of the tube coil 1 and the tube extension device 2 are the same as those of the tube coil 1 and the tube extension device 2 in the tube coil assembly described above. The difference is that in this tube coil assembly, the positioning device 3 includes a positioning drive motor, which is provided with a drive shaft. The extension device is slidably connected to the drive shaft through a bushing. The positioning drive motor changes the rotation direction of the drive shaft, thereby changing the movement direction of the tube extension device 2, so that the positioning device 3 drives the tube extension device 2 to reciprocate between the first side and the second side of the bottom surface. In other words, regardless of whether the coil assembly is in the first or second state, the rotation direction of the drive shaft driven by the positioning drive motor is constantly changing. When the tube extension device 2 moves to the first side of the bottom surface of the coil 1, the direction of rotation of the positioning drive motor changes, causing the rotation direction of the drive shaft to change as well. This causes the bushing 32 to begin moving along the drive shaft from the first side to the second side of the bottom surface of the coil 1. The tube extension device 2 moves along with the bushing 32 from the first side to the second side of the bottom surface of the coil 1. When the tube extension device 2 moves along with the bushing 32 to the second side of the bottom surface of the coil 1, the positioning drive motor changes its driving direction again, causing the rotation direction of the drive shaft to change again. The bushing 32 then begins moving along the drive shaft from the second side to the first side of the bottom surface of the coil 1, and this cycle repeats. In other words, by changing the direction of rotation of the positioning drive motor, the rotation direction of the drive shaft is changed, thereby changing the sliding direction of the bushing 32 on the drive shaft, thus changing the moving direction of the tube extension device 2, enabling the tube extension device 2 to reciprocate between the first and second sides of the bottom surface of the coil 1. In practical applications, the drive shaft is provided with an external thread, and the bushing 32 is provided with an internal thread that mates with the thread. When the drive shaft rotates, the external thread mates with the internal thread, causing the bushing 32 to slide along the drive shaft, thereby driving the tube extension device 2 to reciprocate between the first and second sides of the bottom surface of the tube disc 1.

[0038] The coil assembly in this embodiment also includes a working area where the positioning device 3 operates. The first end of the working area corresponds to the first side of the bottom surface of the coil 1, and the second end of the working area corresponds to the second side of the bottom surface of the coil 1. A first sensor is provided at the first end, and a second sensor is provided at the second end. When the positioning device 3 moves to the first end of the working area, the first sensor senses the positioning device 3 and triggers a signal, causing the rotation direction of the positioning drive motor to change, and the movement direction of the positioning device 3 to change. When the positioning device 3 moves to the second end of the working area, the second sensor senses the positioning device 3 and triggers a signal, causing the rotation direction of the positioning drive motor to change, and the movement direction of the positioning device 3 to change. In other words, the area with external threads on the drive shaft is the working area where the positioning device 3 operates. The end of the external thread corresponding to the first side of the bottom surface of the tube disc 1 is the first end, and the end of the external thread corresponding to the second side of the bottom surface of the tube disc 1 is the second end. When the bushing 32 moves to the first end, the first sensor senses the bushing 32 and triggers a signal, changing the rotation direction of the positioning drive motor and the movement direction of the bushing 32. The bushing 32 begins to drive the tube extension device 2 from the first side to the second side of the bottom surface of the tube disc 1. When the bushing 32 moves to the second end, the second sensor senses the bushing 32 and triggers a signal, changing the rotation direction of the positioning drive motor and the bushing 32 begins to drive the tube extension device 2 from the second side to the first side of the bottom surface of the tube disc 1. This process continues, with the bushing 32 reciprocating between the first and second ends of the drive shaft and being continuously sensed by the first and second sensors, triggering signals to continuously change the rotation direction of the positioning drive motor, thereby causing the tube extension device 2 to reciprocate between the first and second sides of the bottom surface of the tube disc 1.

[0039] Please see Figure 5This application also relates to a watering truck that uses the first type of coil assembly described above. The watering truck includes wheels 4, which drive the truck to move within the field during irrigation operations, moving from the end near the water supply point to the end away from the water supply point, and then returning to the end near the water supply point after moving to the end away from the water supply point. When the watering truck moves from the end near the water supply point to the end away from the water supply point, the coil assembly is in the first state, and the coil 1 is in the pipe-releasing state. When the coil assembly releases the pipe, if the coil 1 rotates too fast, the length of pipe released by the coil 1 per unit time will be greater than the distance the wheel 4 drives the watering truck to travel. This will cause a large amount of pipe to accumulate on the field behind the watering truck, wasting pipe and causing the pipe to not be straightened. Twisted sections of the pipe will affect the water flow and the water output when the watering truck is spraying. If the coil 1 rotates too slowly, the length of pipe released by the coil 1 per unit time will be less than the length of pipe released by the wheel 4. As the water truck travels a certain distance, the hose will be pulled, causing it to disconnect from the water supply point. Therefore, the speed of releasing the hose must be matched with the speed at which the water truck moves away from the water supply point. When the water truck moves from the end away from the water supply point to the end closer to the water supply point, the hose coil assembly is in the second state, and the hose coil 1 is in the hose retraction state. If the rotation speed of the hose coil 1 is too fast during hose retraction, the length of the hose wound on the hose coil 1 per unit time will be greater than the distance the wheel 4 drives the water truck to travel, causing the hose to be pulled and disconnecting from the water supply point. If the rotation speed of the hose coil 1 is too slow during hose retraction, the length of the hose wound on the hose coil 1 per unit time will be less than the distance the wheel 4 drives the water truck to travel. The hose coil 1 will accumulate in front of the water truck in the direction of movement and will be crushed by the water truck's wheel 4, affecting the stability of the water truck's movement, the water output when the water truck is spraying, and also affecting the service life of the hose. Therefore, the hose retraction speed must be matched with the speed at which the water truck moves towards the end closer to the water supply point. Since the moving speed of the water truck is determined by the rotational angular velocity of the wheel 4, and the speed of the pipe feeding and retracting of the pipe disc 1 is determined by the rotational angular velocity of the pipe disc 1, the rotational angular velocity of the wheel 4 is proportional to the rotational angular velocity of the pipe disc 1.

[0040] When the watering truck starts working, the movement of the watering truck driven by the wheel 4 must be synchronized with the placement or retraction of the pipe on the pipe tray 1 and maintain a suitable speed. Similarly, when the pipe tray 1 is placing or retracting the pipe, the movement of the pipe extension device 2 driven by the positioning device 3 must be synchronized with the placement of the pipe on the pipe tray 1 and maintain a suitable speed. If any of the wheel 4, pipe tray 1, or positioning device 3 moves prematurely or lags behind, it will affect the coordination between the pipe and the watering truck. Furthermore, mismatched speeds will also result in inadequate coordination between the pipe and the watering truck. In this embodiment, the rotating shaft 31, wheel 4, and pipe tray 1 are all driven by the same drive device 5, and their rotation angles are proportional. The rotation directions of the wheel 4 and pipe tray 1 are opposite. Please refer to [link / reference]. Figures 1 to 4In specific applications, the drive device 5 includes a drive motor 51, an output drive shaft 52, an output sprocket 53, a transmission gear 54, and a follower gear 55. The output end of the drive motor 51 is connected to the output sprocket 53 and the transmission gear 54. The follower gear 55 is mounted on the output drive shaft 52 and meshes with the transmission gear 54. Two of the wheel bodies 4 are connected to the two ends of the output drive shaft 52. The tube disc 1 is provided with a central shaft, on which a first input sprocket 11 and a first output sprocket 12 are mounted. A second input sprocket 33 is mounted on the rotating shaft 31. The sprocket 11 is connected to the output sprocket 53 via chain drive, and the first output sprocket 12 is connected to the second input sprocket 33 via chain drive. When the drive motor 51 starts, the output sprocket 53 and the transmission gear 54 connected to the drive end of the drive motor 51 rotate. The transmission gear 54 drives the follower gear 55 to rotate, which in turn drives the output drive shaft 52 to rotate. The wheel bodies 4 located at both ends of the output drive shaft 52 rotate, causing the watering truck to move away from the water supply point. The output sprocket 53 drives the first input sprocket 11 to rotate via the chain, thereby... The pipe disc 1 is rotated and pipe feeding begins. The first output sprocket 12 rotates with the central axis of the pipe disc 1, and drives the second input sprocket 33 to rotate via a chain. The second input sprocket 33 drives the rotating shaft 31 to rotate. The positioning device 3 begins to drive the pipe extension device 2 to reciprocate between the first and second sides of the bottom surface of the pipe disc 1. When the water truck moves to the end away from the water supply point, the drive motor 51 rotates in the opposite direction. The output sprocket 53 and the transmission gear 54 connected to the drive end of the drive motor 51 rotate in the opposite direction. The transmission gear 54 drives the follower gear 55 to rotate. The follower gear 55 drives the output drive shaft 52 to rotate. The wheels 4 located at both ends of the output drive shaft 52 rotate, causing the water truck to move closer to the water supply point. The output sprocket 53 drives the first input sprocket 11 to rotate via a chain, thereby causing the pipe disc 1 to rotate and begin to retract the pipe. The first output sprocket 12 rotates with the central axis of the pipe disc 1 and drives the second input sprocket 33 to rotate via a chain. The second input sprocket 33 drives the rotating shaft 31 to rotate. The positioning device 3 begins to drive the pipe extension device 2 to reciprocate between the first and second sides of the bottom surface of the pipe disc 1.

[0041] In other words, when the wheel 4 drives the watering truck to move from the end closer to the water supply point to the end farther away from the water supply point, the wheel 4 rotates clockwise in its direction of movement. At this time, the coil assembly is in the first state, the coil 1 is in the unloading state, the coil 1 rotates counterclockwise relative to the wheel 4, and the pipe is released from the coil 1 through the pipe passage. When the watering truck moves from the end farther away from the water supply point to the end closer to the water supply point, the wheel 4 rotates counterclockwise and drives the watering truck to move backward. At this time, the coil assembly is in the second state, the coil 1 is in the retraction state, the coil 1 rotates clockwise relative to the wheel 4, and the pipe is wound onto the wheel 4 through the pipe passage.

[0042] Please see Figures 1 to 4In this embodiment, the pipe extension device 2 is equipped with a pipe driving device 6 and a movable pipe pressing device 7. The pipe driving device 6 has a self-rotating first pipe pressing surface, and the movable pipe pressing device 7 is movably disposed on the opposite side of the first pipe pressing surface, forming a second pipe pressing surface. A pipe passage is formed between the first and second pipe pressing surfaces. The pipe wound on the bottom surface of the pipe coil 1 passes through this pipe passage. When the irrigation truck is located at the end of the field near the water supply point, the pipe is completely wound on the bottom surface of the pipe coil 1. When the irrigation truck moves from the end near the water supply point to the end away from the water supply point, the pipe coil 1 begins to release the pipe. To ensure the pipe between the pipe coil 1 and the pipe extension device 2 remains taut, the first pipe pressing surface of the pipe driving device 6 rotates and pulls the pipe outward from the bottom surface of the pipe coil 1, allowing the pipe to smoothly pass through the pipe passage and be laid at the rear end of the irrigation truck's moving direction. When the irrigation truck moves to the end away from the water supply point, the rear of the irrigation truck is fully covered with the pipe. When the water truck needs to return to the end closer to the water supply point, the pipe reel 1 needs to rotate and retract the pipe. When retracting the pipe, the pipe reel 1 needs to overcome the force including the frictional force generated by the weight of the pipe acting on the second pressure pipe surface. At this time, the pipe between the pipe reel 1 and the pipe extension device 1 remains taut. When the wheel 4 brings the water truck back and moves towards the water supply point, the pipe reel 1 rotates and winds the pipe onto the bottom surface of the pipe reel 1. At this time, the pipe winds onto the pipe reel 1 through the pipe passage, so that the pipe can be neatly wound onto the pipe reel 1.

[0043] Please see Figure 1 and Figure 3 In this embodiment, the tube driving device 6 includes a driver 61 and a rotating shaft 62. The rotating shaft 62 has a first pressing surface. The driver 61 is used to drive the rotating shaft 62 to rotate when the tube is placed on the tube tray 1. The rotating shaft 62 is perpendicular to the direction of movement of the tube through the tube channel. During pipe placement, the rotation of the pipe disc 1 only releases the pipe from the disc, but does not push it through the pipe passage. Therefore, while the pipe is being released from the disc, the pipe drive device 6 is needed to pull the pipe through the passage. The force pulling the pipe comes from the friction between the first pressing surface and the pipe as the first pressing surface rotates autonomously. Therefore, in actual use, the driver 61 needs to drive the rotating shaft 62 to rotate. The surface of the rotating shaft 62 is the first pressing surface. When the driver 61 drives the rotating shaft 62 to rotate, the pipe is limited by the first pressing surface and the second pressing surface. Friction is generated between the pipe and the first pressing surface and the second pressing surface. When the first pressing surface rotates with the rotating shaft 62, the friction between the first pressing surface and the pipe causes the first pressing surface to generate an outward pulling force on the pipe. This pulling force pulls the pipe on the disc 1 through the pipe passage to move outward. Furthermore, in order to give the tube driven by the tube drive device 6 the maximum pulling force to the tube released from the tube coil 1 when the tube is released, the rotating shaft 62 needs to be perpendicular to the direction of movement of the tube through the tube channel. In this way, under the drive of the driver 1 with the same power, the pulling force formed by the friction between the first pressing surface and the tube is maximized.

[0044] In practical use, the linear velocity of the bottom surface of the tube coil 1 must be consistent with the speed of the first pressing surface pulling the tube. That is, the arc length of the bottom surface of the tube coil 1 rotating per unit time must be equal to the arc length of the first pressing surface rotating. This is necessary to maintain the tautness of the tube between the tube coil 1 and the tube passage. However, because multiple layers of tube are wound on the bottom surface of the tube coil 1, after the second layer of tube is wound onto the bottom surface of the tube coil 1, the second layer is essentially wound around a cylinder with a radius equal to the sum of the bottom radius of the tube coil 1 and the diameter of the tube. When the tube is wound to the third layer, the radius of the actual wound cylinder increases by the length of the tube diameter, and so on. Therefore, during the tube release process, if the tube release speed of the tube coil 1 is made equal to the linear velocity of the first pressing surface, the length of the tube released above the first layer on the tube coil 1 per unit time is actually greater than the arc length of the first pressing surface rotating per unit time. Therefore, only when only one layer of tube is wound on the bottom surface of the tube coil 1 can the linear velocity of the first pressing surface on the rotating shaft 62 be equal to the linear velocity of the tube coil. 1. The tube release speed is equal; when multiple layers of tube are wound on the bottom surface of tube coil 1, the rotational linear velocity of the first pressing surface on the rotating shaft 62 needs to be greater than the tube release speed of tube coil 1 to keep the tube between tube coil 1 and the tube passage taut and to tighten the tube on the bottom surface of tube coil 1. The more layers of tube are wound on the bottom surface of tube coil 1, the greater the rotational linear velocity of the first pressing surface on the rotating shaft 62 needs to be compared with the tube release speed of tube coil 1. This ensures that the tube between the first pressing surface and tube coil 1 is kept taut. When the rotational linear velocity of the first pressing surface on shaft 62 is greater than 1.3 times the tube release speed of tube disc 1, it indicates that there are too many layers of tubes wound on the bottom surface of tube disc 1. Usually, for the convenience of use, the number of layers of tubes wound on the bottom surface of tube disc 1 should be kept at an appropriate level. When the number of layers is too high, the multiple layers of tubes wound on the bottom surface of tube disc 1 are prone to tilting due to instability of the center of gravity. Therefore, in specific applications, the rotational linear velocity of the first pressing surface on shaft 62 should be 1.0-1.3 times the tube release speed of tube disc 1.

[0045] In this embodiment, the first pressing surface is an arc surface adapted to the outer curved surface of the tube. That is, the surface of the rotating shaft 62 is provided with an arc-shaped groove, and the surface of the arc-shaped groove is the first pressing surface. The size of the arc-shaped groove on the rotating shaft 62 is adapted to the size of the outer curved surface of the tube. In this way, when the tube enters the tube passage, the outer curved surface of the tube is limited by the first pressing surface and the second pressing surface, and abuts against the first pressing surface and the second pressing surface. This can increase the contact area between the tube and the first pressing surface, thereby increasing the friction between the tube and the first pressing surface when the tube passes through the tube passage. This ensures that when the driver 61 drives the rotating shaft to rotate during the tube release process, the first pressing surface generates a sufficiently large pulling force on the tube.

[0046] In this embodiment, a soft dielectric layer is provided on the first pressure pipe surface. The surface friction of the soft dielectric layer is greater than that of the first pressure pipe surface; the hardness of the soft dielectric layer is less than the hardness of the material of the first pressure pipe surface. The soft dielectric can increase the friction between the first pressure pipe surface and the pipe. Furthermore, since the hardness of the soft dielectric on the first pressure pipe surface is less than the hardness of the material of the first pressure pipe surface, it can further increase the friction between the pipe and the first pressure pipe surface. At the same time, the soft dielectric layer can also protect the pipe, preventing damage to the outer surface of the pipe caused by friction between the first pressure pipe surface and the pipe during long-term use, thus avoiding water leakage and reducing the service life of the pipe.

[0047] In this embodiment, the second pressing surface is also an arc surface adapted to the outer curved surface of the tube. That is to say, the movable pressing device 7 is also provided with an arc-shaped groove. The surface of the arc-shaped groove on the movable pressing device 7 is the second pressing surface. The size of the arc-shaped groove on the movable pressing device 7 is adapted to the size of the outer curved surface of the tube. In this way, when the tube enters the tube passage, the outer curved surface of the tube is limited by the first pressing surface and the second pressing surface, and contacts the first pressing surface and the pressing surface. By increasing the contact area between the tube and the second pressing surface, the friction between the tube and the first pressing surface when the tube passes through the tube passage is increased. During the tube release process, when the driver 61 drives the rotating shaft 62 to rotate, the first pressing surface generates a sufficiently large pulling force on the tube.

[0048] In this embodiment, a soft medium layer is provided on the second pressure pipe surface. The surface friction of the soft medium layer is greater than that of the second pressure pipe surface; the hardness of the soft medium layer is less than the hardness of the material of the second pressure pipe surface. The soft medium can increase the friction between the second pressure pipe surface and the pipe. Furthermore, because the hardness of the soft medium on the second pressure pipe surface is less than the hardness of the material of the second pressure pipe surface, it can increase the friction between the pipe and the second pressure pipe surface, while also protecting the pipe. This prevents friction damage to the outer surface of the pipe caused by friction between the first and second pressure pipe surfaces and the pipe during long-term use, thus avoiding pipe leakage and reducing the pipe's service life.

[0049] In this embodiment, the movable tube pressing device 7 includes a roller body with a shaft, a second tube pressing surface is provided on the periphery of the roller body, the shaft extends outside the roller body, and the tube extension device 2 has grooves 21 on both the left and right sides. The left and right shafts of the roller body are slidably connected to the grooves 21 on both sides and can rotate within the grooves 21; please refer to Figure 2 and Figure 3In the first state, the second pressing surface of the movable pressing device 7 is driven to the first position by the force of the tube moving outward, and rotates in the first position, thus limiting the movement of the tube together with the first pressing surface of the tube drive device 6. That is, in the first state, the tube disc 1 is in the tube-releasing state. If the tube disc 1 rotates counterclockwise to release the tube, the driver 61 of the tube drive device 6 will drive the rotating shaft 62 to rotate clockwise and apply a pulling force to the tube to move it outward through the tube channel. Therefore, when the rotating shaft 62 rotates and applies a pulling force to the tube to move it outward through the tube channel to the first pressing surface, the tube moves while simultaneously applying a force along the direction of tube movement to the second pressing surface. Since the shafts at both ends of the roller of the movable pressing device 7 can slide within the slide groove 21, Under the force applied by the tube to the second pressing surface, the shafts at both ends of the roller body move to a position in the direction of tube feeding within the slide groove 21. This position is denoted as the first position. The force applied by the tube to the second pressing surface can only move the shafts at both ends of the roller body to the first position within the slide groove 21. After reaching the first position, the force applied by the tube to the second pressing surface can only cause the shafts at both ends of the roller body to rotate within the slide groove 21. During the rotation, the shafts, together with the first pressing surface, limit the movement of the tube, keeping the tube between the tube disc 1 and the tube passage in a taut state.

[0050] Please see Figure 2 and Figure 3In this embodiment, the coil assembly also includes a second state. In the second state, the coil 1 rotates and is in a retracting state. The second pressing surface of the movable pressing device 7 is driven to a second position by the force of the inward movement of the tube and rotates in the second position, increasing the area of ​​the tube passage between it and the first pressing surface of the tube driving device 6. That is, after the tube on the coil 1 is released, the coil assembly still needs a state to retract the tube on the coil 1. This state is the second state of the coil assembly. In the second state, the coil 1 rotates and winds the released tube through the tube passage onto the bottom surface of the coil 1. In the second state, the rotation direction of the coil 1 is opposite to the rotation direction when the coil is releasing the tube in the first state. After all the tube is released, the tube is laid behind the coil assembly. At this time, the force on the tube between the tube passage and the coil 1 includes the weight of the released tube and the friction between the tube and the first pressing surface and the second pressing surface. This force causes the coil 1 to be in contact with the tube passage. The tubes between the channels remain taut, ensuring that the released tubes, after passing through the tube channel and winding onto the tube reel, remain neat and tidy. Furthermore, since the driver 61 of the tube drive device 6 only drives the rotating shaft 62 to rotate during tube release, in the second state, as the tube reel 1 rotates and pulls the released tube through the tube channel towards the bottom surface of the tube reel 1, when the tube reel 1 begins to rotate and pull the tube through the tube channel towards the bottom surface of the tube reel 1, the rotating shaft 62 can only rotate on the tube extension device, while the shafts at both ends of the rollers of the movable tube pressing device 7 can slide within the groove 21. Therefore, the friction between the tube and the first pressing surface is minimal. The force causes the tube to drive the rotating shaft 62 to rotate. The friction between the tube and the second pressing surface causes the tube to exert a force on the second pressing surface in the same direction as the tube's movement during winding. This force causes the tube to move the shafts at both ends of the roller body along the slide groove 21 to the second position of the slide groove 21. After the shafts at both ends of the roller body are moved to the second position, the friction between the tube and the second pressing surface causes the tube to only drive the roller body to rotate when winding towards the bottom surface of the tube disc 1. This causes the shafts at both ends of the roller body to rotate within the second position of the slide groove 21. Since the tube moves from the outside to the inside in the tube passage direction when the tube disc 1 winds the tube, the tube overcomes the first pressing surface during winding. The extra force from the friction between the first and second pressing tube surfaces will cause the second pressing tube surface to move, which means that the shafts at both ends of the roller body will move to the second position of the slide groove 21. This second position is the position to reduce the friction between the tube and the first and second pressing tube surfaces. Therefore, when the shafts at both ends of the roller body move to the second position of the slide groove 21, the distance between the first and second pressing tube surfaces increases, that is, the tube passage area increases. Thus, when the tube is wound, after the shafts at both ends of the roller body of the movable pressing tube device 7 are brought to the second position of the slide groove 21, the tube disc 1 only needs to overcome a small frictional force to wind the tube onto the bottom surface of the tube disc 1.

[0051] In this embodiment, the shafts on both sides of the roller of the movable pressing device 7 can slide from the first position to the second position; can slide from the second position to the first position, and the second position is higher than the first position; and the shafts on both sides of the roller are defined by inclined grooves 21; the shafts on both sides of the roller can rotate in the first position and the second position; the shafts on both sides of the roller can rotate at any position between the first position and the second position; the movable pressing device 7 can cooperate with the pipe to realize the pipe release function in the first state and the pipe retraction function in the second state.

[0052] In other words, during pipe winding, increasing the friction between the pipe and the first and second pressing surfaces, especially the friction between the pipe and the first pressing surface, increases the pulling force of the pipe drive device 6 on the pipe. Therefore, at this time, the area of ​​the pipe passage needs to be reduced so that the pipe is pressed tightly by the first and second pressing surfaces. During pipe winding, the power for winding comes from the rotation of the pipe disc 1. The pipe disc 1 needs to overcome the weight of the pipe and the friction between the first and second pressing surfaces. At this time, reducing the friction between the pipe and the first and second pressing surfaces is necessary to increase the winding power. That is to say, during pipe unwinding, the distance between the first and second pressing surfaces needs to be reduced, i.e. The area of ​​the pipe passage needs to be reduced. During pipe retraction, the distance between the first and second pressing surfaces needs to be increased, meaning the area of ​​the pipe passage needs to be larger. If the chute 21 is horizontally positioned, the distance between the pipe drive device 6 and the movable pressing device 7 will be minimized only when they are directly opposite each other. At this time, the contact area between the first and second pressing surfaces and the pipe is also maximized. When releasing the pipe, the pipe drives the movable pressing device 7 to move within the chute, which only increases the distance between the first and second pressing surfaces and reduces the contact area between the pipe and the first and second pressing surfaces, thus reducing the friction between the pipe and the first and second pressing surfaces. Therefore, in this embodiment of the coil assembly, the chute... The roller is tilted, with the end closer to the tube coil 1 being higher than the end farther from the tube coil 1. This way, during tube release, as the tube drives the movable pressing device 7 along the slide 21 towards the end farther from the tube coil 1, the shafts at both ends of the roller move downwards along the slide 21. During tube retraction, as the tube drives the movable pressing device 7 along the slide 21 towards the end closer to the tube coil 1, the shafts at both ends of the roller move upwards along the slide 21. The position of the shafts at both ends of the roller during tube release is the first position, and the position during tube retraction is the second position, thus the second position is higher than the first position. If all the tube wound on the bottom surface of the tube coil 1 is released, the shafts at both ends of the roller... The position of the shaft in the groove 21 is recorded as the second position. When the tube is completely wound on the bottom surface of the tube disc 1, the position of the shaft at both ends of the roller in the groove 21 is recorded as the first position. The first position is the lowest point of the groove 21, and the second position is the highest point of the groove 21. When the tube is released to different lengths, the position of the shaft at both ends of the roller in the groove 21 is different. When the length of the released tube is recovered to different lengths, the position of the shaft at both ends of the roller in the groove 21 will also change. Therefore, the shafts on both sides of the roller can rotate at any position between the first position and the second position, as long as the movable tube pressing device 7 can cooperate with the tube to realize the tube release function in the first state and the tube recovery function in the second state.

[0053] In this embodiment, when the watering truck moves from the end closest to the water supply point to the end furthest from the water supply point, the motor drives the wheel 4 to rotate clockwise, simultaneously driving the pipe disc 1 to rotate counterclockwise and the rotating shaft 31 to rotate in the first direction. The rotation of the wheel 4 drives the watering truck to move, and the rotation of the pipe disc 1 releases the pipe wound on the pipe disc 1 through the pipe extension device 2. The pipe is laid on the field behind the direction of movement of the watering truck. During the process of releasing the pipe from the pipe disc 1, the rotating shaft 31 rotates and drives the pipe extension device 2 to move back and forth between the first and second sides of the bottom surface of the pipe disc 1 through the bushing 32, so that the pipe wound on the pipe disc 1 is released in an orderly manner. When the pipe passes through the pipe passage, due to the pulling force of other pipes on the pipe disc 1, the pipe in the pipe passage presses upward against the first pressing surface of the rotating shaft 62. The driver 61 drives the rotating shaft 62 to rotate. The shaft 62 rotates, pulling the pipe on the pipe disc 1 so that the pipe can be smoothly released from the pipe disc 1. After the irrigation truck moves to the end of the field away from the water supply point, the driving direction of the motor changes, the wheel 4 starts to rotate counterclockwise and drives the irrigation truck to move backward and closer to the water supply point. The pipe disc 1 starts to rotate clockwise and performs pipe retraction. At the same time, the rotating shaft 31 starts to rotate in the second direction and drives the pipe extension device 2 to move back and forth between the first and second sides of the bottom surface of the pipe disc 1, so that the pipe is wound onto the irrigation truck layer by layer. When retracting the pipe, due to the weight of the pipe laid on the field, the pipe presses against the second pressing surface formed by the movable pressing device 7. At this time, the driver 61 no longer drives the rotating shaft 62 to rotate, and the weight of the pipe keeps the pipe between the second pressing surface and the pipe disc 1 in a taut state.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coil assembly, characterized in that, include: A tube coil having a bottom surface for winding tubes, and the width of the bottom surface being at least greater than the length of two tube diameters; A tube extension device having a tube passage through which a tube wound on the bottom surface of the tube coil passes; A positioning device is located on the bottom surface of the tube tray and is fixedly connected to the tube extension device. The positioning device is used to drive the tube extension device from the first side of the bottom surface to the second side, and from the second side to the first side.

2. The coil assembly according to claim 1, characterized in that, The system includes a first state and a second state. In the first state, the tube coil is in a tube-laying state, and the tube wound on the bottom surface of the tube coil moves outward through the tube passage of the tube extension device. The rotation direction of the tube coil is the tube-laying direction. In the second state, the tube coil is in a tube-retracting state, and the tube moves from the outside to the inside through the tube passage of the tube extension device and is wound on the bottom surface of the tube coil. The rotation direction of the tube coil is the tube-retracting direction. In both the first and second states, the rotation angle of the tube coil is proportional to the speed at which the positioning device moves.

3. The coil assembly according to claim 2, characterized in that, The positioning device includes a rotating shaft and a bushing that encloses the rotating shaft. The bushing is connected to the tube extension device. An outer slide rail is provided on the outer surface of the rotating shaft. A structure adapted to the outer slide rail is provided inside the bushing. In a first state, the rotating shaft rotates in a first rotation direction adapted to the first state. In a second state, the rotating shaft rotates in a second rotation direction, which is opposite to the first rotation direction. In a unit time, the angle of rotation of the tube disc is proportional to the angle of rotation of the rotating shaft.

4. The coil assembly according to claim 3, characterized in that, The outer surface of the rotating shaft is provided with a working area of ​​an outer slide rail, the working area being adapted to the length of the bottom surface of the tube coil; the working area includes a first end and a second end, the first end and the second end being respectively corresponding to the first side and the second side of the bottom surface of the tube coil; so that when the bushing is located at the first end, the tube can be placed or retracted at the first side; when the bushing is located at the second end, the tube can be placed or retracted at the second side; in the first state, the rotating shaft rotates in a first rotation direction, and when the bushing moves to the second end, it is located at the end point of the working area, the bushing cooperates with the outer slide rail, so that the bushing moves from the second end to the first... In the first state, the rotating shaft rotates in a first direction, and when the bushing moves to the first end, it is located at the end of the working area. The bushing cooperates with the outer slide rail, causing the bushing to move from the first end to the second end. In the second state, the rotating shaft rotates in a second rotation direction, and when the bushing moves to the second end, it is located at the end of the working area. The bushing cooperates with the outer slide rail, causing the bushing to move from the second end to the first end. In the second state, the rotating shaft rotates in a second direction, and when the bushing moves to the first end, it is located at the end of the working area. The bushing cooperates with the outer slide rail, causing the bushing to move from the first end to the second end.

5. The coil assembly according to claim 2, characterized in that, The positioning device includes a motor with a drive shaft. The extension device is slidably connected to the drive shaft via a bushing. The motor changes the rotation direction of the drive shaft, thereby changing the movement direction of the tube extension device, so that the positioning device drives the tube extension device to reciprocate between the first and second sides of the bottom surface.

6. The coil assembly according to claim 5, characterized in that, It also includes the working area where the positioning device operates. The first end of the working area corresponds to the first side of the bottom surface of the tube disk, and the second end of the working area corresponds to the second side of the bottom surface of the tube disk. The first end is provided with a first sensor, and the second end is provided with a second sensor. When the positioning device runs to the first end of the working area, the first sensor senses the positioning device and triggers a signal, the rotation direction of the motor changes, and the movement direction of the positioning device changes. When the positioning device moves to the second end of the working area, the second sensor senses the positioning device and triggers a signal, causing the rotation direction of the motor to change and the movement direction of the positioning device to change.

7. A watering truck, comprising the coil assembly according to any one of claims 1-6, characterized in that, It also includes a wheel, the angular velocity of which is proportional to the angular velocity of the tube disc.

8. The watering truck according to claim 7, characterized in that, The rotating shaft, the wheel, and the tube disc are all driven by the same drive device and their rotation angles are proportional. The rotation directions of the wheel and the tube disc are opposite.

9. The watering truck according to claim 7, characterized in that, The tube extension device is equipped with a tube driving device and a movable tube pressing device. The tube driving device forms a first tube pressing surface that rotates autonomously. The movable tube pressing device is movably disposed on the opposite side of the first tube pressing surface and forms a second tube pressing surface. A tube passage is formed between the first tube pressing surface and the second tube pressing surface. The tube wound on the bottom surface of the tube coil passes through the tube passage.

10. The watering truck according to claim 9, characterized in that, The tube driving device includes a driver and a rotating shaft. The rotating shaft has a first pressing surface. The driver is used to drive the rotating shaft to rotate when the tube coil is released. The rotating shaft is perpendicular to the direction of movement of the tube through the tube channel. The rotational linear velocity of the first pressing surface on the rotating shaft is 1.0-1.3 times the tube coil release speed.

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