Anti-blocking irrigation device for agricultural planting and pulse position coding communication method

Abstract

The invention relates to an anti-blocking irrigation device for agricultural planting and a pulse position coding communication method.The anti-blocking irrigation device comprises a conveying pipe used for conveying water to irrigation nozzles, the two ends of the conveying pipe are connected with the irrigation nozzles and a water pump respectively, a filter plate is arranged in the conveying pipe, and a mounting frame and a cleaning assembly are arranged on the portions, located on the two opposite faces of the filter plate, in the conveying pipe respectively; a threaded connecting piece is arranged between the mounting frame and the filter plate; the threaded connecting piece comprises a screw rod and a sleeve, the sleeve sleeves the screw rod and is in threaded fit with the screw rod, and the ends, relatively far away from each other, of the sleeve and the screw rod are connected with the mounting frame and the filter plate respectively; the cleaning assembly comprises a scraping plate, the scraping plate is in sliding fit with the conveying pipe and can slide in the length direction of the conveying pipe, and one face of the scraping plate abuts against one face of the filtering plate. When the filter plate is blocked by impurities, the filter plate can rotate to be matched with the scraping plate to clean the accumulated impurities so as to recover the filtering effect of the filter plate, the filter plate is driven to rotate through cooperation of water pressure and the threaded connecting piece, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural irrigation, and in particular to an anti-blocking irrigation device for agricultural planting and a pulse position coding communication method. Background Art

[0002] In order to ensure the normal growth of crops and obtain high and stable yields, crops must be supplied with sufficient water. Under natural conditions, the water requirements of crops cannot be met due to insufficient precipitation or uneven distribution. Therefore, artificial irrigation must be carried out to make up for the lack of natural rainfall. Agricultural irrigation methods can generally be divided into traditional surface irrigation, ordinary sprinkler irrigation and micro-irrigation. Among them, ordinary sprinkler irrigation is a more common irrigation method in the process of crop cultivation.

[0003] However, when the irrigation device in the prior art is used for irrigation, since the irrigation water contains a lot of impurities, the filter in the water pipe cannot disperse the impurities during the transportation and spraying process. The impurities will slowly accumulate on the filter screen of the water pipe after moving with the water flow, causing the filter screen to be blocked. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an anti-blocking irrigation device for agricultural planting, so as to solve the problem that when the prior art irrigation device is irrigating, due to the large amount of impurities in the irrigation water, the filter in the water pipe cannot disperse the impurities during the transportation and spraying process. The impurities will slowly accumulate on the filter screen of the water pipe after moving with the water flow, causing the filter screen to be blocked.

[0005] The present invention is achieved through the following technical solutions:

[0006] An anti-blocking irrigation device for agricultural planting, comprising a delivery pipe for delivering water to an irrigation nozzle, the two ends of the delivery pipe are respectively connected to the irrigation nozzle and the water pump, a filter plate with an outer wall in contact with the inner wall of the delivery pipe is arranged in the delivery pipe, a mounting frame and a cleaning assembly are respectively arranged on two opposite sides of the filter plate in the delivery pipe, and a threaded connector is arranged between the mounting frame and the filter plate;

[0007] The threaded connector includes a screw with an external thread on its outer surface and a sleeve with an internal thread on its inner surface, the sleeve is sleeved outside the screw and matched with the screw thread, and one end of the sleeve and the screw that is relatively far away is connected to the mounting frame and the filter plate respectively;

[0008] The cleaning assembly comprises a scraper, which is slidably matched with the conveying pipe. The scraper can slide along the length direction of the conveying pipe, and one side of the scraper is against one side of the filter plate.

[0009] Furthermore, two limiting grooves are respectively arranged on opposite sides of the inner surface of the delivery pipe, and limiting blocks slidingly matched with the two limiting grooves are respectively arranged at both ends of the scraper, and the central part of the scraper is rotationally matched with a side of the filter plate away from the water pump.

[0010] Furthermore, a flexible sleeve is provided between the mounting frame and the filter plate. The flexible sleeve is sleeved outside the threaded connector, and two ends of the flexible sleeve are respectively connected to the mounting frame and the filter plate.

[0011] Furthermore, a tension spring is arranged in the flexible sleeve, and two ends of the tension spring are respectively connected to the mounting frame and the filter plate.

[0012] Furthermore, the cleaning assembly further comprises a collection box, the top surface of the delivery pipe is provided with a groove for installing the collection box, and the side and bottom surfaces of the collection box are respectively provided with an input port communicating with the inside of the delivery pipe and an output port for discharging water out of the collection box;

[0013] The flexible sleeve is provided with a connecting tube, and two ends of the connecting tube are respectively connected to the flexible sleeve and the collecting box.

[0014] Furthermore, a flap and a limit plate are provided in the output port, and the flap and the limit plate are provided up and down, and are respectively located on both sides of the output port, and one end of the flap away from the limit plate is hinged to the output port through a torsion spring, and the bottom surface of one end of the flap close to the limit plate is against the top surface of the limit plate.

[0015] Furthermore, the top surface of the delivery pipe is provided with an opening, the opening is communicated with the top surface of the collection box, a cover plate is provided at the opening, a plurality of drainage plates are further provided in the delivery pipe between the water pump and the filter plate, the plurality of drainage plates are uniformly distributed along the circumferential direction of the inner surface of the delivery pipe, the plurality of drainage plates extend spirally at one end facing the filter plate, a through hole is provided on the side wall of the end of the delivery pipe away from the water pump, a fixing frame for installing an irrigation nozzle is provided in the through hole, a side of the irrigation nozzle away from the delivery pipe is an output side, a side close to the delivery pipe is an input side, the input side is communicated with the inner cavity of the delivery pipe, a dredging component for dredging the irrigation nozzle is provided in the delivery pipe, a telescopic rod is fixedly connected to the central part of one side of the filter plate on which the scraper is installed, the telescopic end of the telescopic rod is connected to the filter plate, the fixed end is rotatably connected to the inner wall of the delivery pipe, and a cam is provided at the fixed end;

[0016] The dredging assembly includes a dredging rod, a first fixed plate, an elastic support member and a second fixed plate. The dredging rod is slidably matched with the fixed frame, and the dredging rod passes through the fixed frame. The first fixed frame and the second fixed frame are respectively installed at the two ends of the dredging rod. The elastic support member is located between the fixed frame and the second fixed plate. The elastic support member is respectively connected to the fixed frame and the second fixed plate, and the second fixed plate is located on the rotation track of the cam.

[0017] Furthermore, a communication method based on pulse position modulation is also included, and the method is applied to a signal transmission system for an irrigation sprinkler, and the system includes: a host, at least two slaves, a signal encoder, and at least one signal decoder, wherein the host is provided with the signal encoder for encoding information, and each of the slaves is provided with a signal decoder for decoding received information, and the method is applied to the host, and the method includes:

[0018] generating a data packet to be sent containing demodulation information based on the data to be sent;

[0019] Generate a data signal based on pulse position modulation and a corresponding communication time signal according to the data packet to be sent, and transmit the data signal and the communication time signal to the data sending device via a channel;

[0020] Receive a feedback signal sent by a slave, and generate the next batch of data to be sent according to the feedback signal of the slave; wherein the next batch of data to be sent is generated according to the feedback information of the slave, and includes instructions for the next batch of operations of the slave.

[0021] Furthermore, the method further comprises: according to a preset communication time period between the host and the slave, in accordance with a time sequence, dividing the time into a slave power supply time period and a host information sending time period to the slave;

[0022] The system includes a pulse position modulation circuit, and the step of generating a data signal based on pulse position modulation according to the data packet to be sent includes:

[0023] The data stream receiving port of the pulse position modulation circuit receives a binary data stream and a basic pulse signal; the pulse position modulation circuit modulates the rising edge of the basic pulse signal according to the binary data stream to generate a data signal based on pulse position modulation, wherein the data signal based on pulse position modulation is marked at a special position of the pulse signal, and the data signal to be transmitted is expressed by the mark.

[0024] Further, the step of corresponding communication time signal comprises:

[0025] According to a preset marking method, the time of the data signal based on pulse position modulation is marked as a communication time signal, wherein the communication time signal can be identified by the slave and used to determine the time when the master sends the data signal based on pulse position modulation;

[0026] The step of transmitting the data signal and the communication time signal to the data sending device via the channel comprises:

[0027] According to a preset format, the data signal in the data packet to be sent and the corresponding communication time signal are pre-coded to generate a binary data stream; based on the binary data stream, a data signal based on pulse position modulation and a corresponding communication time signal are generated, and the data signal and the corresponding communication time signal are transmitted to the data sending device via a channel.

[0028] The beneficial effects of the present invention are:

[0029] The anti-blocking irrigation device for agricultural planting can rotate itself and cooperate with a scraper to clean the accumulated impurities when the filter plate is blocked by impurities, so as to restore the filtering effect of the filter plate. The rotation of the filter plate is driven by water pressure and a threaded connector, and the structure is simple and the cost is low.

[0030] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 is a cross-sectional view of the present invention;

[0033] Figure 3 is a cross-sectional view of the flexible sleeve and the filter plate of the present invention;

[0034] Figure 4 It is a schematic diagram of the internal structure of the collection box of the present invention.

[0035] In the figure:

[0036] 1. Irrigation nozzle; 2. Delivery pipe; 201. Filter plate; 3. Mounting frame; 4. Screw; 401. Sleeve; 5. Scraper; 6. Limiting groove; 601. Limiting block; 7. Flexible sleeve; 701. Tension spring; 8. Collecting box; 9. Connecting pipe; 10. Flap; 11. Limiting plate; 12. Cover plate; 13. Drainage plate; 14. Fixed frame; 15. Telescopic rod; 16. Cam; 17. Clearing rod; 18. First fixed plate; 19. Elastic support member; 20. Second fixed plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0042] See also Figure 1-4The present invention provides a technical solution: an anti-blocking irrigation device for agricultural planting, comprising a delivery pipe 2 for delivering water to an irrigation nozzle 1, the two ends of the delivery pipe 2 are respectively connected to the irrigation nozzle 1 and the water pump, a filter plate 201 whose outer wall is in contact with the inner wall of the delivery pipe 2 is arranged in the delivery pipe 2, a mounting frame 3 and a cleaning assembly are respectively arranged on two opposite sides of the filter plate 201 in the delivery pipe 2, and a threaded connector is arranged between the mounting frame 3 and the filter plate 201;

[0043] The threaded connector includes a screw 4 with an external thread on its outer surface and a sleeve 401 with an internal thread on its inner surface. The sleeve 401 is sleeved outside the screw 4 and threadedly matched with the screw 4. The ends of the sleeve 401 and the screw 4 that are relatively far away are respectively connected to the mounting frame 3 and the filter plate 201.

[0044] The cleaning assembly includes a scraper 5 , which is slidably matched with the conveying pipe 2 . The scraper 5 can slide along the length direction of the conveying pipe 2 , and one side of the scraper 5 abuts against one side of the filter plate 201 .

[0045] During the irrigation process, water flows through the water pump and the delivery pipe 2 in sequence and then through the irrigation nozzle 1 for irrigation, thereby achieving irrigation. The filter plate 201 is provided with a plurality of filter holes extending through its thickness to filter the water. At the same time, the filter plate 201 is connected to the mounting frame 3 through a threaded connector, so that it can move toward the nozzle and rotate at the same time through the threaded cooperation of the sleeve 401 and the screw 4. The mounting frame 3 and the cleaning assembly are respectively located on one side of the filter plate 201 close to the water pump and the irrigation nozzle 1.

[0046] A plurality of elastic protrusions are arranged on one side of the scraper plate 5 facing the filter plate 201 , and the plurality of elastic protrusions are respectively located on the rotation tracks of the plurality of filter holes.

[0047] During specific use, when the filter plate 201 of the delivery pipe 2 is blocked by impurities contained in the water, the flow rate of water passing through the filter plate 201 is gradually reduced due to the blockage, while the water flow rate of the input delivery pipe 2 is constant. Therefore, the water pressure on the side of the filter plate 201 close to the water pump will increase, thereby pushing the filter plate 201 to move away from the water pump.

[0048] The movement of the filter plate 201 drives the sleeve 401 to move synchronously in the same direction. During the movement of the sleeve 401, the internal thread on its inner surface cooperates with the external thread on the outer surface of the screw 4, so that the sleeve 401 rotates along the thread direction of the external thread. As a result, the filter plate 201 rotates while moving. During the rotation, the elastic protrusion on the side of the scraper 5 continuously inserts into the filter hole on the filter plate 201, thereby pushing out the impurities in the filter hole, thereby preventing the impurities from accumulating in the filter hole to cause the filter hole to be blocked. At the same time, when the filter plate 201 rotates, the scraper 5 can scrape off the stains on the surface of the filter plate 201.

[0049] That is, when the filter plate 201 is clogged with impurities, it can rotate by itself and cooperate with the scraper 5 to clean the accumulated impurities to restore the filtering effect of the filter plate 201. The rotation of the filter plate 201 is driven by water pressure and threaded connectors, with a simple structure and low cost.

[0050] In this embodiment: two limiting grooves 6 are respectively provided on opposite sides of the inner surface of the delivery pipe 2, and limiting blocks 601 that slide with the two limiting grooves 6 are respectively provided at both ends of the scraper 5, and the central part of the scraper 5 rotates with the side of the filter plate 201 away from the water pump.

[0051] The central part of the scraper plate 5 is rotatably matched with the central part of the filter plate 201, so that the scraper plate 5 and the filter plate 201 form a whole.

[0052] During specific use, when the filter plate 201 is pushed by water pressure, the scraper 5 moves synchronously in the same direction. At this time, the limit blocks 601 at both ends of the scraper 5 slide in the limit groove 6, thereby limiting the maximum distance that the filter plate 201, the scraper 5 and the limit block 601 can move through the length of the limit groove 6.

[0053] The limiting block 601 and the limiting groove 6 are adapted dovetail groove structures, so that the scraper 5 can slide stably in the groove through the two limiting blocks 601 .

[0054] In this embodiment: a flexible sleeve 7 is further provided between the mounting frame 3 and the filter plate 201 , and the flexible sleeve 7 is sleeved outside the threaded connector, and two ends of the flexible sleeve 7 are respectively connected to the mounting frame 3 and the filter plate 201 .

[0055] When in use, the threaded connector is wrapped by the flexible sleeve 7 to reduce the contact between water and the threaded connector, thereby effectively improving the durability of the threaded connector.

[0056] The flexible sleeve 7 is a bellows-shaped structure, and its side wall is foldable, so it has stretchability to adapt to the increase in the distance between the filter plate 201 and the mounting frame 3 when the filter plate 201 moves.

[0057] In this embodiment: a tension spring 701 is further arranged in the flexible sleeve 7 , and two ends of the tension spring 701 are respectively connected to the mounting frame 3 and the filter plate 201 .

[0058] In specific use, when the water pressure is greater than the elastic force of the tension spring 701, the filter plate 201 will be pushed by the water pressure in the direction away from the water pump. When the impurities accumulated on the filter plate 201 that cause clogging are cleaned by the scraper 5, water passes through the filter plate 201 normally, and the water pressure gradually decreases, and the elastic force of the tension spring 701 pulls the filter plate 201 to return to its original position.

[0059] In this embodiment: the cleaning assembly further includes a collection box 8, the top surface of the delivery pipe 2 is provided with a groove for installing the collection box 8, and the side and bottom surfaces of the collection box 8 are respectively provided with an input port communicating with the inside of the delivery pipe 2 and an output port for discharging water out of the collection box 8;

[0060] The flexible sleeve 7 is provided with a connecting tube 9 , and two ends of the connecting tube 9 are connected to the flexible sleeve 7 and the collecting box 8 respectively.

[0061] The two ends of the flexible sleeve 7 are connected to the mounting frame 3 and the filter plate 201 , so that a sealed space is formed inside the flexible sleeve 7 .

[0062] The connection port of the collecting box 8 contacts the water surface in the delivery pipe 2 .

[0063] During specific use, when the filter plate 201 is pushed by water pressure, the flexible sleeve 7 is stretched as a whole, and the inner cavity of the flexible sleeve 7 is also stretched, and its cross-sectional area is reduced, which causes the space inside the flexible sleeve 7 to become narrower, causing the internal pressure to decrease, and then the air in the collection box 8 is evacuated through the connecting tube 9 connected to the flexible sleeve 7, and then the water is absorbed through the collection box 8, so that the impurities and mixed water scraped off by the scraper 5 are sucked into the collection box 8 through the input port, and the water is discharged through the output port.

[0064] In this embodiment: a flap 10 and a limit plate 11 are provided in the output port, and the flap 10 and the limit plate 11 are arranged up and down, and the flap 10 and the limit plate 11 are respectively located on both sides of the output port, and one end of the flap 10 away from the limit plate 11 is hinged to the output port through a torsion spring, and the bottom surface of one end of the flap 10 close to the limit plate 11 is against the top surface of the limit plate 11.

[0065] In the natural state, the flap 10 is prompted to maintain the state of covering the input port by installing the torsion spring.

[0066] During specific use, when the flexible sleeve 7 evacuates air from the collection box 8 through the connecting tube 9, the internal pressure of the collection box 8 is reduced. Under the action of the pressure, the flap 10 overcomes the elastic force of the torsion spring and flips upward to expand the input port, and water is sucked into the collection box 8 through the input port.

[0067] In this embodiment: the top surface of the delivery pipe (2) is provided with an opening, the opening is communicated with the top surface of the collection box (8), a cover plate (12) is provided at the opening, a plurality of guide plates (13) are provided in the delivery pipe (2) between the water pump and the filter plate (201), the plurality of guide plates (13) are evenly distributed along the circumferential direction of the inner surface of the delivery pipe (2), the plurality of guide plates (13) extend in a spiral shape at one end facing the filter plate (201), a through hole is provided on the side wall of the end of the delivery pipe (2) away from the water pump, a nozzle for installing an irrigation nozzle (201) is provided in the through hole 1), the side of the irrigation nozzle (1) away from the delivery pipe (2) is the output side, the side close to the delivery pipe (2) is the input side, the input side is in communication with the inner cavity of the delivery pipe (2), a dredging component for dredging the irrigation nozzle (1) is arranged in the delivery pipe (2), a telescopic rod (15) is fixedly connected to the middle part of the side of the filter plate (201) on which the scraper (5) is installed, the telescopic end of the telescopic rod (15) is connected to the filter plate (201), the fixed end is rotatably connected to the inner wall of the delivery pipe (2), and a cam (16) is arranged at the fixed end;

[0068] The dredging assembly comprises a dredging rod (17), a first fixed plate (18), an elastic support member (19) and a second fixed plate (20); the dredging rod (17) is slidably matched with the fixed frame (14); the dredging rod (17) passes through the fixed frame (14); the first fixed frame (14) and the second fixed frame (14) are respectively mounted at two ends of the dredging rod (17); the elastic support member (19) is located between the fixed frame (14) and the second fixed plate (20); the elastic support member (19) is respectively connected to the fixed frame (14) and the second fixed plate (20); and the second fixed plate (20) is located on the rotation track of the cam (16).

[0069] A sealing ring is provided around the cover plate 12. When the cover plate 12 is embedded in the opening, the sealing ring abuts against the inner wall of the opening, thereby increasing the sealing performance of the opening.

[0070] During specific use, the operator can clean the impurities collected in the collection box 8 by opening the cover 12, so that the collection box 8 can be used for a long time;

[0071] When the water flows in the delivery pipe 2, the multiple guide plates 13 guide the water in a spiral shape, so that the water has a tendency to flow in a spiral direction, thereby increasing the impact of the water flow, so as to reduce the possibility of impurities accumulating on the filter plate 201 and clogging it.

[0072] Among them, the telescopic rod 15 is composed of a tube body and a rod body that are connected to each other. The opposite ends of the tube body and the rod body are respectively connected to the filter plate 201 and the inner wall of the conveying pipe 2. The rod body and the conveying pipe 2 are rotatably connected, so that when the filter plate 201 moves, the telescopic rod 15 can shrink to adapt to the moving distance of the filter plate 201.

[0073] During specific use, the filter plate 201 rotates, driving the telescopic rod 15 and the cam 16 on the telescopic rod 15 to rotate synchronously. When the cam 16 rotates to a certain angle, it will contact the second fixed plate 20. At this time, as the cam 16 continues to rotate, the tip of the cam 16 will squeeze the second fixed plate 20, prompting the second fixed plate 20 to drive the dredging rod 17 to move toward the direction of the irrigation nozzle 1, so that the irrigation nozzle 1 is dredged by the dredging rod 17, so that the irrigation nozzle 1 is not easily blocked.

[0074] Among them, when the second fixed plates drive the unblocking rod 17 to move toward the irrigation nozzle 1, the elastic support member 19 is squeezed and compressed and elastically stores energy. When the cam 16 moves away from the second fixed plate 20, the second fixed plate 20 is pushed out by the elastic force of the elastic support member 19, so that it is away from the irrigation nozzle 1, thereby intermittently pushing the unblocking rod 17 to unblock the irrigation nozzle 1 through the rotation of the cam 16.

[0075] In this embodiment: a communication method based on pulse position modulation is also included, and the method is applied to a signal transmission system for an irrigation sprinkler, the system comprising: a host, at least two slaves, a signal encoder, and at least one signal decoder, the host is provided with the signal encoder for encoding information, and each of the slaves is provided with a signal decoder for decoding received information, the method is applied to the host, and the method comprises:

[0076] generating a data packet to be sent containing demodulation information based on the data to be sent;

[0077] Generate a data signal based on pulse position modulation and a corresponding communication time signal according to the data packet to be sent, and transmit the data signal and the communication time signal to the data sending device via a channel;

[0078] Receive a feedback signal sent by a slave, and generate the next batch of data to be sent according to the feedback signal of the slave; wherein the next batch of data to be sent is generated according to the feedback information of the slave, and includes instructions for the next batch of operations of the slave.

[0079] In this embodiment: the method further comprises: according to a preset communication time period between the host and the slave, dividing the time into a power supply time period of the slave and a time period of the host sending information to the slave in accordance with a time sequence;

[0080] The system includes a pulse position modulation circuit, and the step of generating a data signal based on pulse position modulation according to the data packet to be sent includes:

[0081] The data stream receiving port of the pulse position modulation circuit receives a binary data stream and a basic pulse signal; the pulse position modulation circuit modulates the rising edge of the basic pulse signal according to the binary data stream to generate a data signal based on pulse position modulation, wherein the data signal based on pulse position modulation is marked at a special position of the pulse signal, and the data signal to be transmitted is expressed by the mark.

[0082] In this embodiment: the corresponding communication time signal step includes:

[0083] According to a preset marking method, the time of the data signal based on pulse position modulation is marked as a communication time signal, wherein the communication time signal can be identified by the slave and used to determine the time when the master sends the data signal based on pulse position modulation;

[0084] The step of transmitting the data signal and the communication time signal to the data sending device via the channel comprises:

[0085] According to a preset format, the data signal in the data packet to be sent and the corresponding communication time signal are pre-coded to generate a binary data stream; based on the binary data stream, a data signal based on pulse position modulation and a corresponding communication time signal are generated, and the data signal and the corresponding communication time signal are transmitted to the data sending device via a channel.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An anti-blocking irrigation device for agricultural planting, comprising a delivery pipe (2) for delivering water to an irrigation nozzle (1), the two ends of the delivery pipe (2) being respectively connected to the irrigation nozzle (1) and a water pump, and a filter plate (201) having an outer wall in contact with an inner wall of the delivery pipe (2) being arranged in the delivery pipe (2), characterized in that: A mounting frame (3) and a cleaning assembly are respectively arranged on two opposite sides of the filter plate (201) in the delivery pipe (2), and a threaded connection piece is arranged between the mounting frame (3) and the filter plate (201); The threaded connector comprises a screw (4) having an external thread on its outer surface and a sleeve (401) having an internal thread on its inner surface, the sleeve (401) being sleeved outside the screw (4) and threadably matched with the screw (4), and the ends of the sleeve (401) and the screw (4) being relatively far away from each other are respectively connected to the mounting frame (3) and the filter plate (201); The cleaning assembly comprises a scraper (5), the scraper (5) is slidably matched with the conveying pipe (2), the scraper (5) can slide along the length direction of the conveying pipe (2), and one side of the scraper (5) is against one side of the filter plate (201).

2. The anti-blocking irrigation device for agricultural planting according to claim 1, characterized in that: Two limiting grooves (6) are respectively arranged on opposite sides of the inner surface of the delivery pipe (2); limiting blocks (601) that are slidably matched with the two limiting grooves (6) are respectively arranged at both ends of the scraper (5); and the middle part of the scraper (5) is rotationally matched with a side of the filter plate (201) away from the water pump.

3. The anti-blocking irrigation device for agricultural planting according to claim 1, characterized in that: A flexible sleeve (7) is also provided between the mounting frame (3) and the filter plate (201), the flexible sleeve (7) being sleeved outside the threaded connector, and the two ends of the flexible sleeve (7) being respectively connected to the mounting frame (3) and the filter plate (201).

4. The anti-blocking irrigation device for agricultural planting according to claim 3 is characterized in that: A tension spring (701) is also provided in the flexible sleeve (7), and two ends of the tension spring (701) are respectively connected to the mounting frame (3) and the filter plate (201).

5. The anti-blocking irrigation device for agricultural planting according to claim 1, characterized in that: The cleaning assembly further comprises a collection box (8); the top surface of the delivery pipe (2) is provided with a groove for mounting the collection box (8); the side surface and the bottom surface of the collection box (8) are respectively provided with an input port communicating with the interior of the delivery pipe (2) and an output port for discharging water out of the collection box (8); The flexible sleeve (7) is provided with a connecting tube (9), and two ends of the connecting tube (9) are respectively connected to the flexible sleeve (7) and the collecting box (8).

6. The anti-blocking irrigation device for agricultural planting according to claim 5, characterized in that: A flap (10) and a limit plate (11) are arranged in the output port. The flap (10) and the limit plate (11) are arranged up and down. The flap (10) and the limit plate (11) are respectively located on two sides of the output port. One end of the flap (10) away from the limit plate (11) is hinged to the output port through a torsion spring, and the bottom surface of one end of the flap (10) close to the limit plate (11) abuts against the top surface of the limit plate (11).

7. The anti-blocking irrigation device for agricultural planting according to claim 1, characterized in that: The top surface of the delivery pipe (2) is provided with an opening, the opening is communicated with the top surface of the collection box (8), a cover plate (12) is provided at the opening, a plurality of guide plates (13) are also provided in the delivery pipe (2) between the water pump and the filter plate (201), the plurality of guide plates (13) are evenly distributed along the circumference of the inner surface of the delivery pipe (2), the plurality of guide plates (13) extend in a spiral shape at one end facing the filter plate (201), a through hole is provided on the side wall of the end of the delivery pipe (2) away from the water pump, a fixing for mounting the irrigation nozzle (1) is provided in the through hole A fixed frame (14), wherein the side of the irrigation nozzle (1) away from the delivery pipe (2) is an output side, and the side close to the delivery pipe (2) is an input side, the input side is in communication with the inner cavity of the delivery pipe (2), a dredging component for dredging the irrigation nozzle (1) is arranged in the delivery pipe (2), a telescopic rod (15) is fixedly connected to the middle part of the side of the filter plate (201) on which the scraper (5) is installed, the telescopic end of the telescopic rod (15) is connected to the filter plate (201), the fixed end is rotatably connected to the inner wall of the delivery pipe (2), and a cam (16) is arranged at the fixed end; The dredging assembly comprises a dredging rod (17), a first fixed plate (18), an elastic support member (19) and a second fixed plate (20); the dredging rod (17) is slidably matched with the fixed frame (14); the dredging rod (17) passes through the fixed frame (14); the first fixed frame (14) and the second fixed frame (14) are respectively mounted at two ends of the dredging rod (17); the elastic support member (19) is located between the fixed frame (14) and the second fixed plate (20); the elastic support member (19) is respectively connected to the fixed frame (14) and the second fixed plate (20); and the second fixed plate (20) is located on the rotation track of the cam (16).

8. A pulse position coding communication method based on the anti-blocking irrigation device for agricultural planting according to any one of claims 1 to 7, characterized in that: The method is applied to a signal transmission system for an irrigation sprinkler, the system comprising: a host, at least two slaves, a signal encoder, and at least one signal decoder, the host being provided with the signal encoder for encoding information, each of the slaves being provided with a signal decoder for decoding received information, the method being applied to the host, the method comprising: generating a data packet to be sent containing demodulation information based on the data to be sent; Generate a data signal based on pulse position modulation and a corresponding communication time signal according to the data packet to be sent, and transmit the data signal and the communication time signal to the data sending device via a channel; Receive a feedback signal sent by a slave, and generate the next batch of data to be sent according to the feedback signal of the slave; wherein the next batch of data to be sent is generated according to the feedback information of the slave, and includes instructions for the next batch of operations of the slave.

9. The pulse position coding communication method according to claim 8, characterized in that: The method further comprises: dividing the time into a slave power supply time period and a master information sending time period according to a preset master and slave communication time period in a time sequence; The system includes a pulse position modulation circuit, and the step of generating a data signal based on pulse position modulation according to the data packet to be sent includes: The data stream receiving port of the pulse position modulation circuit receives a binary data stream and a basic pulse signal; the pulse position modulation circuit modulates the rising edge of the basic pulse signal according to the binary data stream to generate a data signal based on pulse position modulation, wherein the data signal based on pulse position modulation is marked at a special position of the pulse signal, and the data signal to be transmitted is expressed by the mark.

10. The pulse position coding communication method according to claim 9, characterized in that: The corresponding communication time signal step includes: According to a preset marking method, the time of the data signal based on pulse position modulation is marked as a communication time signal, wherein the communication time signal can be identified by the slave and used to determine the time when the master sends the data signal based on pulse position modulation; The step of transmitting the data signal and the communication time signal to the data sending device via the channel comprises: According to a preset format, the data signal in the data packet to be sent and the corresponding communication time signal are pre-coded to generate a binary data stream; based on the binary data stream, a data signal based on pulse position modulation and a corresponding communication time signal are generated, and the data signal and the corresponding communication time signal are transmitted to the data sending device via a channel.

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