Water dropper screening disc for discharging stuck water droppers and screening and discharging method

Abstract

The invention belongs to the technical field of dripper screening, and particularly discloses a dripper screening disc for discharging stuck drippers and a screening and discharging method.The dripper screening disc comprises an inner disc, an outer circular ring, an outer check ring, a movable track and a conveying track and further comprises a stuck dripper recognition unit, a stuck dripper discharging unit and a control unit; the stuck water dropper identification unit comprises a first sensor and a second sensor which are fixedly arranged on the conveying track and an inlet of the movable track respectively and are used for detecting water droppers; the stuck water dropper discharging unit is arranged at the upstream of the material conveying direction of the conveying track; the control unit receives a first detection signal that the first sensor does not detect the water dropper continuously for N seconds and a second detection signal that the second sensor detects the water dropper, and then controls the stuck water dropper discharging unit to act. Through automatic detection and linkage control, the stuck drippers can be identified and discharged, the rejection rate is reduced, meanwhile, the continuity of the production line is ensured, and the dripper screening device is suitable for screening the drippers in the drip tape production line.

Description

Technical Field

[0001] The invention belongs to the technical field of dripper screening, and relates to a dripper screening plate for discharging stuck drippers. Background Art

[0002] Water-saving irrigation is the main measure taken by countries around the world to develop modern agriculture. Among them, drip irrigation is an advanced high-standard irrigation technology in water-saving irrigation. It lays a drip irrigation pipe with a flat dripper glued inside in the field to irrigate crops. The structure of the drip irrigation pipe is that the dripper is evenly glued and pressed on the inner wall of the plastic hose. The dripper is provided with a waterway and a drip hole leading to the outside of the pipe. The water entering the drip irrigation pipe drips directly to the roots of the plants through the waterway and drip hole on the dripper.

[0003] The inner-insert dripper is a type of dripper commonly used in actual production. In the production process of drip irrigation pipes, the inner-insert drippers selected by the dripper screening device need to be embedded in the extruded plastic hose, and then the plastic hose is punched at the location of the inner-insert dripper by the punching device to form the drip irrigation pipe. The inner-insert dripper has a front and back side. The structure of a certain type of inner-insert dripper is as follows Figure 1 As shown, during the production process of the inner-inserted drip irrigation tape, it is necessary to ensure that the directions of the inner-inserted drippers screened out by the dripper screening device are correct, otherwise quality problems will occur during subsequent drilling.

[0004] In the prior art, a screening disc is generally used to screen the drippers. The Chinese utility model patent with the authorization announcement number CN202823900U discloses an inner-inserted dripper screening device, which includes a frame, an inner disc, an outer ring, an outer retaining ring, an arc groove, an air blowing channel, and a conveying track for conveying the inner-inserted dripper. The inner disc and the outer ring are rotatably connected to the frame, the inner disc is located in the outer ring, the outer retaining ring is arranged on the upper surface of the outer ring, and the outer retaining ring is provided with an arc groove, and a conveying channel is formed between the arc groove and the upper surface of the outer ring to deliver the dripper to the conveying track. It uses the speed difference between the inner disc and the outer ring to screen the dripper, and discharges the dripper on the opposite side through the arc groove and the air blowing channel during the conveying process of the dripper, thereby ensuring that the dripper passes through the conveying channel in the correct posture. As the processing speed of the drip irrigation tape production line increases, the dripper screening machine is in a high-speed operation state during the dripper screening process, and it is still easy for the dripper to get stuck at the entrance of the conveying channel inside the dripper screening machine. Because the outer ring is constantly rotating under the drive of the motor, the stuck dripper is squeezed by the subsequent drippers and cannot be unblocked by air blowing alone, resulting in the dripper screening machine being unable to supply drippers to the production line normally, causing the drip irrigation pipe production line to shut down. Therefore, a device that can identify and solve the problem of dripper jamming is needed to improve the reliability of the dripper screening machine and ensure the continuous operation of the production line. Summary of the invention

[0005] The object of the present invention is to provide a drip head screening disc for discharging jammed drip heads, which can accurately identify jammed drip heads and discharge them when they are jammed.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A drip head screening disc for discharging jammed drip heads includes an inner disc, an outer ring, an outer retaining ring, and a conveying track located inside the outer ring. It also includes a jammed drip head identification unit, a jammed drip head discharging unit, and a control unit; the signal output end of the jammed drip head identification unit is connected to the detection signal input end of the control unit, and the control signal output end of the control unit is controllably connected to the jammed drip head discharging unit; The jammed drip head identification unit includes a first sensor fixedly arranged on the conveying track for detecting drip heads and a second sensor fixedly arranged upstream of the jammed drip head discharging unit for detecting drip heads; The jammed drip head discharging unit is arranged upstream in the material conveying direction of the conveying track; The signal output ends of the first sensor and the second sensor are connected to the signal input end of the control unit; the signal output end of the control unit is controllably connected to the jammed drip head discharging unit; After the control unit receives a first detection signal that no drip head is detected by the first sensor for N seconds continuously and a second detection signal that a drip head is detected by the second sensor, it sends an instruction to control the action of the jammed drip head discharging unit, where N is a positive number.

[0007] Preferably, the jammed drip head discharging unit includes a movable track, a driving mechanism, and at least one first high-pressure air nozzle; The movable track is located upstream in the material conveying direction of the conveying track. The working position of the movable track is above the outer ring. A space for drip heads to pass through is formed between the movable track and the outer ring. The driving mechanism is arranged on the outer retaining ring at the position of the movable track. When the driving mechanism operates, the movable track moves away from the working position; The blowing end of the first high-pressure air nozzle faces the position of the movable track; The signal output end of the control unit respectively controls the driving mechanism and the first high-pressure air nozzle.

[0008] Preferably, the driving mechanism includes a linear stroke driving member. The linear stroke driving member is fixedly arranged on the outer retaining ring above the movable track. The power output end of the linear stroke driving member is fixedly connected to the upper surface of the movable track, and the movable track moves away from the working position in an upward movement manner.

[0009] Preferably, the driving mechanism includes a linear stroke driving member. The linear stroke driving member is fixedly arranged on the outer retaining ring outside the movable track. The power output end of the linear stroke driving member penetrates through the outer retaining ring and is fixedly connected to the outer side wall of the movable track, and the movable track moves away from the working position in an inward movement manner.

[0010] Preferably, the linear stroke driving member is an orbital cylinder.

[0011] Preferably, the driving mechanism includes a rotating member hinged to the outer retaining ring, the movable track is fixedly connected to the movable end of the rotating member, the driving mechanism further includes a second high-pressure air nozzle, and the blowing end of the second high-pressure air nozzle is arranged towards the movable track, so that when the second high-pressure air nozzle blows air, the movable track leaves the working position through the rotation of the rotating member.

[0012] Preferably, the movable track includes a fixed block and a hinged block, the hinged block is hinged to one end of the side wall of the fixed block facing upstream, the driving mechanism includes a second high-pressure air nozzle, the second high-pressure air nozzle is fixedly connected to the fixed block, and an air passage leading to the hinged block is opened in the fixed block, so that when the second high-pressure air nozzle blows air, the hinged block leaves the working position by rotating away from the fixed block.

[0013] Preferably, it further includes a limiting unit for blocking the continuous movement of the drip head; The limiting unit is fixedly arranged on the outer retaining ring and is located upstream of the stuck drip head discharging unit; The limiting signal output end of the control unit is connected to the control signal input end of the limiting unit; After receiving the first detection signal and the second detection signal, the control unit sends a limiting instruction to control the limiting unit to block the continuous forward movement of the drip head.

[0014] Preferably, the limiting unit includes a first limiting rod and a first limiting cylinder; The first limiting cylinder is fixedly arranged on the outer retaining ring, the first limiting rod is arranged above the drip head, and one end of the first limiting rod is fixedly connected to the power output end of the first limiting cylinder; When the first limiting cylinder pushes the first limiting rod to move downward, the free end of the first limiting rod moves towards the drip head being transported, preventing the drip head from being continuously transported forward; The signal output end of the control unit is controllably connected to the first limiting cylinder.

[0015] The present invention also discloses a screening and discharging method for discharging stuck drip heads, which is realized according to the above-mentioned drip head screening disk for discharging stuck drip heads, and includes Stuck drip head identification: During the working process, continuously judge whether it meets the condition that the first sensor does not detect the drip head for more than N seconds continuously and the second sensor detects the drip head. If so, execute the stuck drip head discharging action. If not, continue to continuously judge, where N is a positive number; Stuck drip head discharging: The control signal output end of the control unit controls the stuck drip head discharging unit to act to discharge the stuck drip head. After the stuck drip head is discharged, the stuck drip head discharging unit resets and continues to execute the stuck drip head identification step.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art lies in: (1) Through the coordinated linkage of the stuck dripper recognition unit and the stuck dripper discharge unit, the present invention realizes the accurate recognition and efficient discharge of stuck drippers. The whole process requires no manual intervention, greatly reducing the equipment failure downtime. While reducing the labor cost, it ensures the continuous high-speed operation of the drip irrigation pipe belt production line; (2) In the stuck dripper discharge unit of the present invention, through the linkage design of the movable track and the first high-pressure air nozzle, the efficient treatment of the dripper stuck fault is realized; when the driving mechanism acts to make the movable track leave the working position, the clearance space of the blocked part can be instantly enlarged, so as to release the stuck dripper and relieve the stuck state, and the first high-pressure air nozzle can blow out the accumulated drippers in a directional manner synchronously. This operation can effectively reduce the treatment time of the dripper stuck and requires no manual intervention; (3) In the stuck dripper recognition unit of the present invention, a dual-sensor collaborative detection mechanism is adopted. This mechanism innovatively adopts spatio-temporal dual criteria: in the time dimension, the first sensor captures the continuous characteristics of the conveying interruption, and in the space dimension, the second sensor is used to confirm the physical existence of the blocked point; this design can not only identify the conventional mechanical stuck of the dripper, but also detect the hidden blockage caused by the out-of-tolerance dripper size; through real-time data cross-validation, the intelligent recognition of the dripper stuck fault is realized; (4) The present invention is additionally provided with a limiting unit. By quickly pressing down the first limiting rod driven by the first limiting cylinder, when a stuck fault is detected, the subsequent drippers can be immediately blocked from continuing to apply pressure to the blocked dripper, avoiding the phenomenon that not all stuck drippers can be removed during the process of removing the stuck drippers; this design cooperates with the stuck dripper discharge unit to form a double protection, so that the drippers do not continue to be conveyed downstream during the unblocking operation, ensuring that the movable track can smoothly return to the working position, and at the same time reducing the difficulty of the cleaning operation of the first high-pressure air nozzle.

[0017] The present invention belongs to the technical field of dripper screening. Through automatic detection and linkage control, it can accurately identify and discharge the stuck drippers when the drippers are stuck, reduce the scrap rate, energy consumption and maintenance cost, and ensure the continuity of the high-speed production line. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0019] In the drawings: Figure 1 It is the structural diagram of a certain type of inlaid dripper; Figure 2Schematic diagram of the installation positions of the stuck dripper discharging unit and the limiting unit in the top view state in Embodiment 1 of the present invention; Figure 3 Schematic diagram of the positional relationship of components in Embodiment 1 of the present invention; Figure 4 Schematic diagram of signal connection in Embodiment 1 of the present invention; Figure 5 Schematic diagram of the structure of the movable track and the driving mechanism in Embodiment 2 of the present invention; Figure 6 Schematic diagram of the structure of the movable track 5 in Embodiment 3 of the present invention.

[0020] In the figure: 1, the first limiting cylinder; 2, the track cylinder; 3, the first high-pressure air nozzle; 4, the first limiting rod; 5, the movable track, 51 - fixed block, 52 - hinged block; 6, the first sensor; 7, the second sensor; 8, the conveying track; 9, the rotating member; 10, the second high-pressure air nozzle; 11, the outer retaining ring. Detailed implementation manners

[0021] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0022] Embodiment 1 As Figures 2 to 4 shown, this embodiment is a dripper screening tray for discharging stuck drippers. This embodiment is an improvement on the existing dripper screening tray. The existing dripper screening tray includes structures such as an inner disc, an outer ring, an outer retaining ring 11, a conveying track 8, etc. The inner disc and the outer ring rotate respectively driven by a motor, which will not be elaborated here. The structure of the existing dripper screening tray can refer to the Chinese utility model patent with the authorization announcement number CN202823900U. It should be noted that the functions of the existing dripper screening tray are not limited to the above patent. As long as the screening tray can realize the dripper screening function and is prone to dripper jamming at the entrance of the conveying track 8 or other qualified dripper output structures, resulting in equipment shutdown, this embodiment can be applied.

[0023] The following details the improved parts. The dripper screening tray of this embodiment further includes a stuck dripper identification unit, a stuck dripper discharging unit, and a control unit.

[0024] The stuck dripper identification unit includes a first sensor 6 fixedly arranged on the conveying track 8 for detecting drippers and a second sensor 7 fixedly arranged upstream of the stuck dripper discharging unit for detecting drippers. Here, "upstream" refers to the upstream along the dripper conveying direction, that is, the incoming material direction of the drippers ( Figure 3on the left side in (the same below). Both the first sensor 6 and the second sensor 7 are photoelectric sensors. The first sensor 6 and the second sensor 7 can be changed to capacitive sensors, inductive sensors, ultrasonic sensors, pressure sensors or mechanical induction sensors according to the actual situation, as long as the first sensor 6 and the second sensor 7 can realize the function of detecting the drip head.

[0025] The stuck drip head discharging unit is arranged upstream of the conveying track and includes a movable track 5, a driving mechanism, and at least one first high-pressure air nozzle 3. The movable track 5 is in a strip structure and is located upstream of the material conveying direction of the conveying track. The working position of the movable track 5 is above the outer ring. A space for the drip head to pass through is formed between the movable track 5 below the working position and the outer ring. The formation method of the space for the drip head to pass through here is not limited. A groove adapted to the upper half of the drip head can be opened on the lower end surface of the movable track 5, so that the upper end surface of the outer ring and the movable track 5 together form a channel for the drip head to pass through. Or the movable track 5 can be set at a suitable position, so that there is a slight gap between the lower end surface of the movable track 5 and the top surface of the drip head, so that the qualified drip head can just pass through below the movable track 5. The setting of the movable track 5 is equivalent to adding a guiding and sorting structure for the drip head upstream of the conveying track 8. If the drip head can pass through the movable track 5 smoothly, the drip head will surely be able to enter the entrance of the conveying track 8 smoothly (the distance between the movable track 5 and the conveying track 8 can be adjusted adaptively, or the movable track 5 can be in contact with the conveying track 8). When the drip head randomly splashes during the high-speed movement of the inner disk or is stuck due to other possible reasons, it will be stuck at the entrance of the movable track 5. The driving mechanism is arranged on the outer retaining ring 11 at the position of the movable track 5 (the outer retaining ring 11 is hidden in Figure 3 in order to more clearly show the structure of this embodiment). When the driving mechanism acts, the movable track 5 leaves the working position. When the movable track 5 leaves the working position, the upper end surface of the outer ring no longer forms a channel for the drip head to pass through with the movable track 5 together. At this time, the drip head stuck at the entrance of the movable track 5 is released. There are two first high-pressure air nozzles 3, which are fixedly arranged on the outer retaining ring 11, and an air passage is opened in the outer retaining ring 11 and is arranged inward and in the direction opposite to the drip head conveying direction. When the first high-pressure air nozzle 3 blows air, the released drip head is blown into the inner disk. To ensure that the stuck drip head can be blown out, two first high-pressure air nozzles 3 are provided in this embodiment. The number of the first high-pressure air nozzles 3 can be adjusted according to the actual situation, as long as it can ensure that the stuck drip head can be blown out. The setting position of the first high-pressure air nozzle can be adjusted according to needs, as long as its air outlet end faces the movable track 5 and can blow the stuck drip head released by the movable track 5 away from the stuck position.

[0026] Further, the driving mechanism includes a linear stroke driving member. In this embodiment, the linear stroke driving member is an orbital cylinder 2. The orbital cylinder 2 is fixedly arranged above the movable track 5, and the power output end of the orbital cylinder 2 is fixedly connected to the upper surface of the movable track 5. When the orbital cylinder 2 contracts, the movable track 5 moves upward to leave the working position. In other embodiments, the setting direction of the orbital cylinder 2 can also be adjusted as needed. For example, the orbital cylinder 2 can be fixedly arranged on the outer retaining ring 11 outside the movable track 5 (both "inside" and "outside" refer to the inside and outside of the device, the same below). The power output end of the orbital cylinder 2 penetrates the outer retaining ring 11 and is fixedly connected to the outer side wall of the movable track 5. When the orbital cylinder 2 extends, the movable track 5 moves inward to leave the working position. The linear stroke driving member can also be a linear motor, an electric telescopic rod, etc., as long as it can make the movable track 5 perform a linear motion.

[0027] The second sensor 7 is arranged upstream of the movable track. The signal output ends of the first sensor 6 and the second sensor 7 are connected to the signal input end of the control unit. The signal output end of the control unit is connected to the control signal input ends of the orbital cylinder 2 and the two first high-pressure nozzles 3.

[0028] After receiving the first detection signal that no drip head is detected by the first sensor 6 for 1 second continuously and the second detection signal that a drip head is detected by the second sensor 7, the control unit sends a control instruction to control the contraction of the orbital cylinder 2 and sends a blowing instruction to control the two first high-pressure nozzles 3 to blow air. The detection time N of the first detection signal and the second detection signal can be changed according to the actual situation, and N is a positive number.

[0029] In order to discharge the jammed drippers without stopping the machine, a limiting unit for blocking the continuous movement of the drippers is preferably designed in this embodiment. The limiting unit includes a first limiting rod 4 and a first limiting air cylinder 1. The first limiting air cylinder 1 is fixedly arranged on the outer retaining ring 11 and is located upstream of the jammed dripper discharging unit. The first limiting rod 4 is arranged above the drippers queuing to enter the moving track 5. One end of the first limiting rod 4 is fixedly connected to the power output end of the first limiting air cylinder 1. The free end of the first limiting rod 4 moves towards the transported drippers under the drive of the first limiting air cylinder 1 until the free end of the first limiting rod 4 is lower than the upper end face of the dripper, thereby preventing the dripper from being transported forward continuously. In actual operation, there are two ways to prevent the dripper from being transported forward continuously: when the first limiting rod 4 moves towards the transported dripper and exactly a dripper passes through, at this time, the free end of the first limiting rod 4 abuts against the dripper, preventing the dripper from being transported forward continuously; when the first limiting rod 4 moves towards the transported dripper and no dripper passes through, the free end of the first limiting rod 4 plays a blocking role on the subsequent drippers, thereby preventing the dripper from being transported forward continuously. No matter which implementation method, as long as it can prevent the dripper from being transported forward continuously. In this embodiment, the first limiting rod 4 of the limiting mechanism is arranged above the dripper, and the setting position of the first limiting rod 4 can be adjusted according to the actual situation. For example: horizontally passing through the outer retaining ring 11 and being at the same horizontal plane as the dripper, or being inclined above the inner disc, as long as the first limiting rod 4 can play the role of blocking the movement of the dripper after extending.

[0030] The signal output end of the control unit is connected to the control signal input end of the first limiting air cylinder 1. After receiving the first detection signal and the second detection signal, the control unit sends a limiting instruction to control the power output end of the first limiting air cylinder 1 to extend.

[0031] In the normal operation state of this embodiment, the inner disc and the outer ring rotate, and the qualified drippers flow through the entrance of the moving track 5 to the next process of the production line.

[0032] When a drip head gets stuck in this embodiment, a composite condition of "exit missing + inlet retention" is used to determine whether the drip head is stuck: when the first sensor 6 fails to detect the drip head for more than 1 second, it transmits a first detection signal to the control unit; when the second sensor 7 detects the drip head at the entrance of the movable track 5, it transmits a second detection signal to the control unit. And only after the control unit receives the first detection signal and the second detection signal simultaneously, will it send a limit instruction, a control instruction, and a blowing instruction. At this time, after receiving the limit instruction, the first limit cylinder 1 drives the first limit rod 4 to extend, preventing subsequent drip heads from continuing to move towards the stuck drip head. Then, the track cylinder 2 contracts under the control instruction, and the movable track 5 rises. The stuck drip head moves to the first high-pressure air nozzle 3 driven by the outer ring. The first high-pressure air nozzle 3 has received the blowing instruction and blows out the stuck drip head. Subsequently, the first high-pressure air nozzle 3 stops blowing, the track cylinder 2 extends, and the first limit cylinder 1 contracts and resets. The drip head continues to move towards the entrance of the movable track 5. The blowing time and blowing rhythm (intermittent blowing or continuous blowing) of the first high-pressure air nozzle 3 can be adjusted as needed.

[0033] It should be noted that the stuck drip head recognition unit and the stuck drip head discharging unit in this embodiment are used to identify and discharge the stuck drip heads at the entrance of the conveying track 8. In other application scenarios, the conveying track 8 can also be of other structures, not limited to this embodiment. For example, when channels for screening or outputting qualified drip heads are fixedly arranged at other positions in the drip head screening tray, there may be drip head splashes causing jams at the entrance of these channels, and their functions are similar to those of the conveying track 8 in this embodiment and can be equivalent to the conveying track.

[0034] In summary, through automatic detection and linkage control, this embodiment can accurately identify and discharge the stuck drip heads when the drip heads are stuck, greatly shortening the processing time, reducing energy consumption and maintenance costs, and ensuring the continuity of the high-speed production line.

[0035] Embodiment 2 As Figure 5 shown, this embodiment is a drip head screening tray for discharging stuck drip heads. This embodiment is roughly the same as the structure in Embodiment 1, except for the drive mechanism for driving the movable track 5 away from the working position.

[0036] Figure 5This is a longitudinal sectional view of the movable track 5 and the driving mechanism in this embodiment. The right side in the figure is the inner side of the device. The driving mechanism includes a rotating member 9 hinged to the outer retaining ring 11. The rotating member 9 is arc-shaped. The upper end of the rotating member 9 is hinged to the outer retaining ring 11 through a hinge seat. The lower end of the rotating member 9 is a movable end. The movable track 5 is fixedly connected to the lower end of the rotating member 9. The driving mechanism further includes a second high-pressure nozzle 10. The second high-pressure nozzle 10 is radially fixed on the outer side wall of the outer retaining ring 11. The blowing end of the second high-pressure nozzle 10 is arranged towards the movable track 5, and an air passage towards the outer side wall of the movable track 5 is formed in the outer retaining ring 11. When the second high-pressure nozzle 10 blows air, the movable track 5 moves inwards and turns upwards under the action of the rotating member 9, and then leaves the working position. In other embodiments, the rotating member 9 can also be of other shapes, such as "]" shape, etc., as long as the upper end of the rotating member 9 can be hinged to the outer retaining ring 11 and the lower end is fixedly connected to the movable track 5. A through hole is opened at the upper end of the rotating member 9. In other embodiments, a counterweight can be fixedly arranged in the through hole as needed to reduce the blowing force of the second high-pressure nozzle 10 on the premise that the movable track 5 can leave the working position.

[0037] Embodiment 3 This embodiment is a drip head screening tray for discharging jammed drip heads. The structure of this embodiment is substantially the same as that in Embodiment 1, and the difference lies in the movable track 55 of the jammed drip head discharging unit and the driving mechanism for moving the movable track 5 away from the working position.

[0038] As Figure 6 shown, a groove adapted to the upper half of the drip head is opened on the lower end surface of the movable track 5 in this embodiment. The movable track 5 includes a fixed block 51 and a hinged block 52. The fixed block 51 is fixedly arranged inside the outer retaining ring. The hinged block 52 is hinged to the upstream side wall of the fixed block 51 and is located at the upper edge of the fixed block 51. The driving mechanism in this embodiment includes a second high-pressure nozzle (not shown in the figure). The second high-pressure nozzle is fixedly connected to the fixed block 51, and an air passage leading to the hinged block 52 is opened in the fixed block 51. When the second high-pressure nozzle blows air, the hinged block 52 turns upwards around the hinge point and leaves the fixed block 51 in a manner similar to "opening a door", so as to leave the working position. In other embodiments, the second high-pressure nozzle can also be fixedly arranged on the outer retaining ring, and an air passage communicating with the air passage in the fixed block 51 is opened on the outer retaining ring, as long as it satisfies that the blowing air of the second high-pressure nozzle drives the hinged block 52 to turn over and leave the working position. In this embodiment, the air outlet end of the first high-pressure nozzle faces the hinged block 52 in the movable track 5 and faces the lower end of the hinged block 52. In other embodiments, the position of the hinge point between the fixed block 51 and the hinged block 52 can be adjusted as needed, as long as the hinged block 52 can leave the fixed block 51 in a manner similar to "opening a door" under the blowing action of the second high-pressure nozzle and thus leave the working position.

[0039] Example 4 This embodiment is a screening and discharging method for discharging stuck emitters, which is realized by the emitter screening disc for discharging stuck emitters, and includes two steps: identifying stuck emitters and discharging stuck emitters.

[0040] The step of identifying stuck emitters includes: continuously judging during the operation of the emitter screening disc whether it satisfies that the first sensor has not detected an emitter for more than N seconds and the second sensor has detected an emitter. If so, the control unit sends a control instruction to start executing the action of discharging stuck emitters. If not, continue to continuously judge. N is a positive number and can be adjusted adaptively according to the equipment operation speed and operation experience.

[0041] The step of discharging stuck emitters includes: the control signal output end of the control unit controls the stuck emitter discharging unit to act to discharge the stuck emitter. Specifically, the control signal output end of the control unit issues an instruction to control the driving mechanism to act, so that the movable track leaves the working position, and the emitter stuck at the entrance of the movable track is released. At the same time, the control signal output end of the control unit issues an instruction to control the first high-pressure air nozzle to blow air to blow out the released emitter. Subsequently, the first high-pressure air nozzle stops blowing air. At the same time, the driving mechanism resets and continues to execute the step of identifying stuck emitters.

[0042] Further, when the emitter screening disc includes a limiting unit, this embodiment further includes an emitter limiting step, which is executed simultaneously with the step of discharging stuck emitters, and includes: the control signal output end of the control unit issues an instruction to control the first limiting rod to extend to prevent subsequent emitters from continuing to move towards the stuck emitter, and when the driving mechanism resets, the first limiting rod resets accordingly.

Claims

1. A drip head screening plate for discharging stuck drip heads, comprising an inner disc, an outer ring, an outer retaining ring, and a conveying track located inside the outer ring, characterized in that, It further includes a stuck dripper recognition unit, a stuck dripper discharging unit, and a control unit; the signal output end of the stuck dripper recognition unit is connected to the detection signal input end of the control unit, and the control signal output end of the control unit is controllably connected to the stuck dripper discharging unit; The stuck dripper recognition unit includes a first sensor fixedly arranged on the conveying track for detecting the dripper and a second sensor fixedly arranged upstream of the stuck dripper discharging unit for detecting the dripper; The stuck dripper discharging unit is arranged upstream in the material conveying direction of the conveying track; The signal output ends of the first sensor and the second sensor are connected to the signal input end of the control unit; the signal output end of the control unit is controllably connected to the stuck dripper discharging unit; After receiving a first detection signal that no dripper is detected by the first sensor for N consecutive seconds and a second detection signal that a dripper is detected by the second sensor, the control unit sends an instruction to control the stuck dripper discharging unit to act, where N is a positive number.

2. The drip head screening tray for discharging jammed drip heads according to claim 1, characterized in that, The stuck dripper discharging unit includes a movable track, a driving mechanism, and at least one first high-pressure air nozzle; The movable track is located upstream in the material conveying direction of the conveying track, the working position of the movable track is above the outer ring, a space for the dripper to pass through is formed between the movable track and the outer ring, the driving mechanism is arranged on the outer retaining ring at the position of the movable track, and when the driving mechanism acts, the movable track leaves the working position; The blowing end of the first high-pressure air nozzle faces the position of the movable track; The signal output end of the control unit respectively controls the driving mechanism and the first high-pressure air nozzle.

3. The drip head screening tray for discharging jammed drip heads according to claim 2, characterized in that, The driving mechanism includes a linear stroke driving part, the linear stroke driving part is fixedly arranged on the outer retaining ring above the movable track, the power output end of the linear stroke driving part is fixedly connected to the upper surface of the movable track, and the movable track leaves the working position in an upward movement manner.

4. The drip head screening tray for discharging stuck drip heads according to claim 2, characterized in that, The driving mechanism includes a linear stroke driving part, the linear stroke driving part is fixedly arranged on the outer retaining ring outside the movable track, the power output end of the linear stroke driving part penetrates through the outer retaining ring and is fixedly connected to the outer side wall of the movable track, and the movable track leaves the working position in an inward movement manner.

5. A drip head screening tray for discharging jammed drip heads according to claim 3 or 4, characterized in that, The linear stroke driving part is a track cylinder.

6. The drip head screening tray for discharging jammed drip heads according to claim 2, wherein, The driving mechanism includes a rotating part hinged to the outer retaining ring, the movable track is fixedly connected to the movable end of the rotating part, the driving mechanism further includes a second high-pressure air nozzle, and the blowing end of the second high-pressure air nozzle faces the movable track, so that when the second high-pressure air nozzle blows air, the movable track leaves the working position through the rotation of the rotating part.

7. The drip head screening tray for discharging stuck drip heads according to claim 2, characterized in that, The movable track includes a fixed block and a hinged block, the hinged block is hinged to one end of the side wall of the fixed block facing upstream, the driving mechanism includes a second high-pressure air nozzle, the second high-pressure air nozzle is fixedly connected to the fixed block, and an air passage leading to the hinged block is arranged in the fixed block, so that when the second high-pressure air nozzle blows air, the hinged block leaves the fixed block through rotation and leaves the working position.

8. A drip head screening tray for discharging jammed drip heads according to any one of claims 1 to 4, 6, and 7, characterized in that It further includes a limiting unit for blocking the dripper from moving further; The limiting unit is fixedly arranged on the outer retaining ring and is located upstream of the stuck dripper discharging unit; The limit signal output end of the control unit is connected to the control signal input end of the limiting unit; After receiving the first detection signal and the second detection signal, the control unit sends a limit instruction to control the limit unit to block the drip head from moving forward.

9. The drip head screening tray for discharging jammed drip heads according to claim 8, characterized in that, The limit unit includes a first limit rod and a first limit cylinder; The first limit cylinder is fixedly arranged on the outer retaining ring, the first limit rod is arranged above the drip head, and one end of the first limit rod is fixedly connected to the power output end of the first limit cylinder; When the first limit cylinder pushes the first limit rod to move downward, the free end of the first limit rod moves towards the drip head being transported, preventing the drip head from continuing to be transported forward; The signal output end of the control unit is controllably connected to the first limit cylinder.

10. A screening and discharging method for discharging a stuck dripper, characterized in that, The drip head screening plate for discharging jammed drip heads according to any one of claims 1 to 9, comprising Jammed drip head identification: During the working process, continuously judge whether it meets the condition that the first sensor has not detected the drip head for more than N seconds and the second sensor has detected the drip head. If so, execute the jammed drip head discharging action. If not, continue to continuously judge, where N is a positive number; Jammed drip head discharging: The control signal output end of the control unit controls the jammed drip head discharging unit to act to discharge the jammed drip head. After the jammed drip head is discharged, the jammed drip head discharging unit resets and continues to execute the jammed drip head identification step.

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