Self-cleaning mechanism of reel sprinkler and reel sprinkler

Abstract

The application provides a self-cleaning mechanism of a reel sprinkler and the reel sprinkler, and belongs to the technical field of irrigation equipment. The self-cleaning mechanism comprises a main pipe, a first valve, a water delivery pipe, an air inlet pipe section and an air compressor. The end of the air inlet pipe section away from the main pipe is sequentially provided with a second valve and a connecting pipe. The connecting pipe is used for connecting the reel sprinkler. The air inlet pipe section is configured to supply air to the water delivery pipe in a pulse mode. The water delivery pipe is obliquely connected to the main pipe. The pulse nozzle is connected to the air compressor through the pulse valve. The pulse nozzle extends into the inside of the water delivery pipe. When the first valve is closed and the second valve is opened during normal irrigation, the pulse air flow and the water flow are mixed to form an intermittent pulse air-water flow. Through turbulent shear and bubble collapse effect, the pipe wall attachments are stripped, and the on-line self-cleaning of the pipeline under the non-stop state is realized.

Description

Technical Field

[0001] This invention belongs to the field of irrigation equipment technology, specifically referring to a self-cleaning mechanism for a reel sprinkler irrigation machine and the reel sprinkler irrigation machine itself. Background Technology

[0002] The reel-type sprinkler irrigation system is a highly efficient and automated agricultural irrigation device. Driven by water or an electric motor, it slowly rotates the reel and automatically retracts the hose, thus pulling the sprinkler truck across the field while simultaneously irrigating. This equipment is known for its water conservation, labor saving, and strong adaptability. A single unit can control a large area, and it is easy to move, making it particularly suitable for large-scale planting of field crops, pastures, and cash crops. It effectively solves the problems of high labor intensity and low water use efficiency associated with traditional irrigation methods.

[0003] Field wells often draw water directly from shallow or deep groundwater. If the well wall filtration is inadequate or the geological sediment content is high, the water will carry a large amount of suspended impurities such as silt and rust. When this water with high impurity content flows through the hose of a reel-type sprinkler irrigation machine, the impurities will gradually deposit and scale inside the hose wall, and will further accumulate as the hose is retracted and bent, eventually causing blockage inside the hose. This not only weakens the water flow capacity of the sprinkler irrigation machine, but may also damage the sprinkler head and transmission components, seriously affecting irrigation efficiency and equipment life.

[0004] Currently, hose cleaning for reel-type sprinkler systems generally employs an offline disassembly method: the hose must be completely removed from the reel and transferred to a separate cleaning device for cleaning. After cleaning, the hose is then reinstalled onto the reel and wound up again. However, due to the long length of the hoses in reel-type sprinkler systems and the need to wind them onto the reel during installation, the disassembly and assembly process is cumbersome, time-consuming, and labor-intensive, resulting in long equipment maintenance cycles and low operational efficiency. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a self-cleaning mechanism for a reel sprinkler and a reel sprinkler, so as to at least partially solve the problems mentioned in the background art.

[0006] The technical solution adopted by this invention is as follows: This invention proposes a self-cleaning mechanism for a reel sprinkler irrigation machine and a reel sprinkler irrigation machine, comprising: The main pipe has a water inlet and a sewage outlet at its two ends. The water inlet is used to connect to an external water source, and the sewage outlet is equipped with a first valve. A water supply pipe, wherein the water supply pipe is inclined and its lower end is connected between the water inlet end and the sewage outlet end of the main pipe; An air intake pipe section, one end of which is connected to the high end of the water supply pipe, and an air compressor is connected to the outside of the air intake pipe section; The air inlet pipe section is equipped with a second valve and a connecting pipe at the end away from the main pipe, and the connecting pipe is used to connect to the reel sprinkler. The air intake pipe section is configured to supply air to the water supply pipe in a pulse manner.

[0007] Furthermore, a filter screen is installed inside the water supply pipe.

[0008] Furthermore, the air intake pipe section includes an extension pipe, an air supply pipe, and a pulse nozzle. One end of the extension pipe is connected to the high end of the water supply pipe, one end of the air supply pipe passes through the wall of the extension pipe and extends to the inside of the water supply pipe, the pulse nozzle is installed at the end of the air supply pipe located inside the water supply pipe, and the other end of the air supply pipe is located outside the extension pipe and connected to the air compressor.

[0009] Furthermore, a pulse valve is connected in series on the gas supply pipe, and the gas supply pipe is connected to the air compressor through the pulse valve.

[0010] Furthermore, a flexible connecting pipe is provided between the air supply pipe and the air compressor, with the two ends of the flexible connecting pipe connected to the air outlet of the air compressor and the air inlet of the pulse valve, respectively.

[0011] Furthermore, the filter screen is a cylindrical filter screen, and a filter cavity is formed inside the cylindrical filter screen. The air supply pipe and the pulse nozzle are both located inside the filter cavity.

[0012] Furthermore, the angle between the axis of the water supply pipe and the axis of the main pipe is an acute angle, and the lower end of the water supply pipe is closer to the water inlet end of the main pipe than its upper end.

[0013] Furthermore, a drain pipe is installed at the end of the first valve that is furthest from the main pipe.

[0014] Furthermore, both the first valve and the second valve are electrically controlled valves.

[0015] A reel sprinkler irrigation machine, the self-cleaning mechanism of the reel sprinkler irrigation machine further includes a reel, a sprinkler hose and a water spraying trolley, the sprinkler hose is wound on the reel, the sprinkler hose is connected to a water inlet pipe, the connecting pipe of the self-cleaning mechanism is connected to the water inlet pipe, and the water outlet end of the sprinkler hose is connected to the water spraying trolley.

[0016] Beneficial effects: 1. By setting up an inclined water supply pipe connected to the main pipe and a pulse nozzle connected to the air compressor via a pulse valve, and extending the pulse nozzle into the inside of the water supply pipe, when the first valve is closed and the second valve is open during normal irrigation, the pulse airflow mixes with the water flow to form an intermittent pulse air-water flow. Through turbulent shearing and bubble collapse effect, the pipe wall deposits are peeled off, achieving online self-cleaning of the pipeline without stopping the machine.

[0017] 2. By setting up a first valve and a drain pipe at the main drain end, when mud and sand accumulate on the outside of the filter screen, the first valve is opened and the second valve is closed. At the same time, the pulse nozzle continues to spray pulse airflow from the inside to the outside. The water flow and the pulse airflow together flush away the mud and sand and discharge it along the first valve and the drain pipe, thereby achieving backwashing and self-cleaning of the filter screen without disassembling the pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the self-cleaning mechanism and structure of a reel sprinkler according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a self-cleaning mechanism for a reel sprinkler according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the installation positions of the air supply pipe and filter screen in the self-cleaning mechanism of a reel sprinkler according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the air inlet pipe section in the self-cleaning mechanism of a reel sprinkler according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the filter screen in the self-cleaning mechanism of a reel sprinkler machine according to an embodiment of the present invention.

[0019] Among them, 100 is the water inlet pipe; 1 is the main pipe; 11 is the first valve; 12 is the sewage pipe; 2 is the water supply pipe; 21 is the filter screen; 201 is the filter chamber; 3 is the extension pipe; 31 is the air supply pipe; 32 is the pulse nozzle; 33 is the pulse valve; 331 is the air inlet; 4 is the second valve; 41 is the connecting pipe; 5 is the air compressor; and 6 is the flexible connecting pipe.

[0020] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0022] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0023] Example 1 Combination Figure 1 As shown, this embodiment of the invention provides a self-cleaning mechanism for a reel sprinkler and a reel sprinkler, including a main pipe 1, a water supply pipe 2, an air inlet pipe section, a second valve 4, a connecting pipe 41, and an air compressor 5.

[0024] In a specific embodiment, the main pipe 1 is made of corrosion-resistant metal or high-strength engineering plastic. The main pipe 1 has a water inlet and a drain outlet. The water inlet is provided with an external thread or flange interface for connection to the outlet of a field well pump via a pipe.

[0025] Furthermore, a first valve 11 is installed at the sewage discharge end. The first valve 11 is preferably an electric ball valve or an electric butterfly valve for remote automatic control. The outlet end of the first valve 11 can also be connected to a section of sewage pipe 12 via a thread, and the outlet of the sewage pipe 12 leads to a drainage ditch or a sludge collection pit. The inner diameter of the sewage pipe 12 is not less than the inner diameter of the main pipe 1 to prevent silt blockage.

[0026] Combination Figure 1 and Figure 2 As shown, a bypass interface is provided in the middle of the main pipe 1 (between the water inlet and the sewage outlet), and the lower end of the water supply pipe 2 is connected to this interface.

[0027] In a specific embodiment, the water supply pipe 2 is a circular pipe made of the same material as the main pipe 1. The angle between the axis of the water supply pipe 2 and the axis of the main pipe 1 is an acute angle, preferably 30° to 60°, and 30° is used in this embodiment. The lower end of the water supply pipe 2 is fixed to the bypass interface of the main pipe 1 by welding, and its upper end extends upward and to the left at an angle.

[0028] Thus, when the water flows from the main pipe 1 into the water supply pipe 2, the velocity and direction change, and large particles of silt are more likely to settle to the sewage discharge end of the main pipe 1 due to inertia.

[0029] Combination Figure 3 and Figure 4 As shown, the intake pipe section includes an extension pipe 3, an air delivery pipe 31, a pulse nozzle 32, and a pulse valve 33.

[0030] The extension pipe 3 is a round pipe with the same diameter as the water supply pipe 2. One end of it is sealed to the high end of the water supply pipe 2 through a flange, and the other end is connected to the second valve 4 and the connecting pipe 41 in sequence. The pulsed airflow and water are fully mixed in the extension pipe 3, while providing an installation position for the gas supply pipe 31 to be inserted.

[0031] The gas supply pipe 31 passes through a pre-opened sealing hole in the side wall of the extension pipe 3. One end of the gas supply pipe 31 extends into the interior of the extension pipe 3 and into the water supply pipe 2, while the other end of the gas supply pipe 31 is located outside the extension pipe 3.

[0032] The pulse valve 33 is installed at one end of the air supply pipe 31 located outside the extension pipe 3. A flexible connecting pipe 6 is provided between the air supply pipe 31 and the air compressor 5. The two ends of the flexible connecting pipe 6 are respectively connected to the air outlet of the air compressor 5 and the air inlet 331 of the pulse valve 33. The pulse valve 33 is an electromagnetic pilot-operated pulse valve. The pulse nozzle 32 is installed at one end of the air supply pipe 31 located inside the water supply pipe 2. The pulse nozzle 32 is a nozzle with multiple small spray holes. Specifically, the pulse nozzle 32 adopts a 360° annular spray structure, that is, 4 to 8 evenly distributed spray holes are opened on the side of the nozzle.

[0033] Combination Figure 2 and Figure 3 As shown, a second valve 4 and a connecting pipe 41 are installed sequentially at the end of the air inlet pipe section away from the main pipe 1. The connecting pipe 41 is used to connect to the reel sprinkler.

[0034] In a specific embodiment, the second valve 4 is also preferably an electric ball valve, with its inlet end connected to the upper end of the extension pipe 3 and its outlet end connected to the connecting pipe 41. The connecting pipe 41 is a short pipe with an interface at its end that matches the water inlet pipe 100 of the reel sprinkler.

[0035] Thus, during normal irrigation, the first valve 11 is closed and the second valve 4 is open. The external water source pumps water into the inlet of the main pipe 1. Since the first valve 11 is closed, the water can only enter the inclined water pipe 2 upwards. Under the action of inertia, some large particles of mud and sand enter the sewage outlet of the main pipe 1. The water flows upwards along the water pipe 2 through the extension pipe 3, the second valve 4, and the connecting pipe 41, and enters the inlet pipe 100 of the reel sprinkler, finally supplying the sprinkler operation.

[0036] During normal irrigation, the air compressor 5 continuously supplies air, and the pulse valve 33 periodically introduces high-pressure gas into the air supply pipe 31 according to a pre-set program (e.g., opening for 0.5 seconds every 10 seconds). The high-pressure gas is released through the pulse nozzle 32, forming a high-speed pulsed airflow. This airflow mixes violently with the surrounding water to form an air-water mixture. As large bubbles rise in the water flow and move downstream with it, they collapse, generating shock waves. These shock waves repeatedly act on the pipe wall, causing fatigue cracks in the hardened scale layer and causing it to detach. This bubble collapse cavitation effect effectively removes scale from the inner wall of the flexible hose at bends.

[0037] At the same time, the pulsed bubbles mix water, gas and the stripped solid particles into a gas-liquid-solid three-phase flow, and use the bubbles as a carrier to carry the particles downstream, where they are discharged through the sprinkler nozzles, preventing secondary deposition of the particles.

[0038] Combination Figure 3 and Figure 5 As shown, a filter screen 21 is installed inside the water supply pipe 2. The filter screen 21 is a cylindrical filter screen, and the interior of the cylindrical filter screen forms a filter chamber 201. The open end of the cylindrical filter screen faces the high end of the water supply pipe 2, and the closed end faces the low end. Filter holes are opened on the side wall of the cylindrical filter screen, and the hole diameter is set according to the water quality requirements. The filter screen 21 is made of stainless steel perforated plate and its outer diameter is slightly smaller than the inner diameter of the water supply pipe 2, leaving a gap of 5-8 mm between the two as a water flow channel.

[0039] Furthermore, the open end of the filter screen 21 is fixed to the step on the inner wall of the water supply pipe 2 by a snap ring or threaded cap, which facilitates disassembly, cleaning or replacement. The water in the water supply pipe 2 flows from the outside of the filter screen 21 through the mesh and enters the filter chamber 201, and the mud and sand are trapped on the outer surface of the filter screen 21.

[0040] Furthermore, both the gas delivery pipe 31 and the pulse nozzle 32 are located within the filter chamber 201.

[0041] Thus, when the layer of silt accumulated on the outer surface of the filter screen 21 is thick, causing a significant increase in water inlet resistance, the first valve 11 is opened and the second valve 4 is closed. After the water from the external water source enters the main pipe 1, it cannot enter the extension pipe 3 upwards because the second valve 4 is closed. Therefore, the water flows along the water supply pipe 2. At the same time, the pulse valve 33 continues to operate according to the set program, and the pulse nozzle 32 sprays high-pressure pulse airflow from inside the filter chamber 201. The airflow and water flow together impact the mesh of the filter screen 21 from the inside out, washing away the silt particles embedded or attached to the outer surface of the filter screen 21. The detached silt flows downwards into the main pipe 1 with the water flow, and then flows to the right through the first valve 11 and the drain pipe 12 to be discharged.

[0042] It should be noted that the backflushing operation can be automatically performed once during irrigation breaks or every 2-4 hours after irrigation, each lasting 30-60 seconds. After backflushing, close the first valve 11 and open the second valve 4 to resume normal irrigation. Because the second valve 4 is closed during backflushing, the backflushing water will not enter the sprinkler hose, avoiding secondary contamination of the hose by sand-containing water.

[0043] Example 2 Combination Figure 1 As shown, this embodiment provides a reel sprinkler irrigation machine, which includes the self-cleaning mechanism described in Embodiment 1, and also includes a reel, a sprinkler hose, and a water spraying trolley.

[0044] The hose reel is mounted on the trailer via a bracket. The sprinkler hose is made of polyethylene or rubber. One end of the sprinkler hose is connected to the water inlet pipe 100 via a swivel joint. The water inlet pipe 100 is then connected to the self-cleaning mechanism of the present invention via a connecting pipe 41. The other end of the sprinkler hose is connected to the water spraying trolley, which is equipped with multiple nozzles.

[0045] During operation, the water pump delivers well water to the self-cleaning mechanism, and then the water flows through the self-cleaning mechanism into the sprinkler hose. Because the self-cleaning mechanism generates pulse bubbles that continuously produce cavitation and turbulence effects inside the hose, even if the hose is repeatedly bent on the reel, it is not easy for a solid deposit layer to form on its inner wall.

[0046] The working principle of this invention is as follows: In normal irrigation mode, the first valve 11 is closed and the second valve 4 is open. After external water enters the main pipe 1, it flows upward into the inclined water supply pipe 2 due to the closed drain end. The cylindrical filter screen 21 inside the water supply pipe 2 physically filters the water, intercepting most of the sediment. The filtered water then enters the sprinkler hose for irrigation through the second valve 4 and the connecting pipe 41. At the same time, the air compressor 5 periodically sprays pulsed airflow into the inside of the water supply pipe 2 (inside the filter screen 21) through the air supply pipe 31 and the pulse nozzle 32 at a set time interval and frequency via the pulse valve 33. The pulsed airflow mixes with the water flow to form intermittent pulsed air-water flow, generating turbulent shearing and bubble collapse cavitation effects in the pipe. The turbulent shearing causes the water flow velocity to fluctuate violently, thereby peeling off the deposits on the pipe wall. The micro-jet generated when the bubbles collapse impacts the hard scale layer and uses the bubbles to carry the peeled particles downstream, thus achieving the function of online cleaning of the inner wall of the sprinkler hose of the reel sprinkler.

[0047] When a lot of mud and sand accumulates on the outside of the filter screen 21, causing increased resistance, the system switches to the filter screen backwash mode. At this time, the first valve 11 is open and the second valve 4 is closed. After the external water source enters the main pipe 1, it cannot enter the extension pipe 3 because the second valve 4 is closed. The water flows along the water supply pipe 2. At the same time, the pulse nozzle 32 continues to spray pulse airflow from the inside to the outside, which, together with the water flow, impacts the filter screen 21, washing away the mud and sand attached to the mesh and the outer surface. The stripped mud and sand flow downward with the water flow into the main pipe 1, and then are discharged from the system through the first valve 11 and the sewage pipe 12. After the backwash is completed, the valve is reset to resume the irrigation operation. The whole process does not require disassembling any pipes or hoses, realizing the integrated function of online self-cleaning and filter screen backwashing.

[0048] In summary, by incorporating an inclined water pipe 2 connected to the main pipe 1 and a pulse nozzle 32 connected to the air compressor 5 via a pulse valve 33, with the nozzle 32 extending into the inside of the water pipe 2, during normal irrigation when the first valve 11 is closed and the second valve 4 is open, the pulsed airflow mixes with the water flow to form an intermittent pulsed air-water flow. Through turbulent shearing and bubble collapse effects, the flow removes deposits from the pipe wall, achieving online self-cleaning of the pipeline without shutting down the system. By setting a first valve 11 and a drain pipe 12 at the drain end of the main pipe 1, when mud and sand accumulate on the outside of the filter screen 21, the first valve 11 is opened and the second valve 4 is closed. At the same time, the pulse nozzle 32 continues to spray pulse airflow from the inside to the outside. The water flow and the pulse airflow together flush away the mud and sand and discharge it along the first valve 11 and the drain pipe 12, thereby achieving backwashing and self-cleaning of the filter screen 21 without disassembling the pipe.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A self-cleaning mechanism for a reel sprinkler irrigation machine, characterized in that, include: The main pipe (1) has a water inlet and a sewage outlet at its two ends. The water inlet of the main pipe (1) is used to connect to an external water source, and the sewage outlet is equipped with a first valve (11). Water supply pipe (2), the water supply pipe (2) is set at an incline, and its lower end is connected between the water inlet end and the sewage outlet end of the main pipe (1); An air intake pipe section, one end of which is connected to the high end of the water supply pipe (2), and an air compressor (5) is connected to the outside of the air intake pipe section. Wherein, a second valve (4) and a connecting pipe (41) are installed in sequence at the end of the air inlet pipe section away from the main pipe (1), and the connecting pipe (41) is used to connect to the reel sprinkler. The air intake pipe section is configured to supply air to the water supply pipe (2) in a pulse manner.

2. The self-cleaning mechanism of the reel sprinkler according to claim 1, characterized in that: The water supply pipe (2) is equipped with a filter screen (21).

3. The self-cleaning mechanism of the reel sprinkler according to claim 2, characterized in that: The air intake pipe section includes an extension pipe (3), an air supply pipe (31), and a pulse nozzle (32). One end of the extension pipe (3) is connected to the high end of the water supply pipe (2). One end of the air supply pipe (31) passes through the wall of the extension pipe (3) and extends to the inside of the water supply pipe (2). The pulse nozzle (32) is installed at one end of the air supply pipe (31) inside the water supply pipe (2). The other end of the air supply pipe (31) is located outside the extension pipe (3) and is connected to the air compressor (5).

4. The self-cleaning mechanism of the reel sprinkler according to claim 3, characterized in that: A pulse valve (33) is connected in series on the gas supply pipe (31), and the gas supply pipe (31) is connected to the air compressor (5) through the pulse valve (33).

5. The self-cleaning mechanism of the reel sprinkler according to claim 4, characterized in that: A flexible connecting pipe (6) is provided between the air supply pipe (31) and the air compressor (5). The two ends of the flexible connecting pipe (6) are respectively connected to the air outlet of the air compressor (5) and the air inlet (331) of the pulse valve (33).

6. The self-cleaning mechanism of the reel sprinkler according to claim 3, characterized in that: The filter screen (21) is a cylindrical filter screen, and a filter cavity (201) is formed inside the cylindrical filter screen. The air supply pipe (31) and the pulse nozzle (32) are both located inside the filter cavity (201).

7. The self-cleaning mechanism of the reel sprinkler according to claim 1, characterized in that: The angle between the axis of the water supply pipe (2) and the axis of the main pipe (1) is an acute angle, and the lower end of the water supply pipe (2) is closer to the water inlet end of the main pipe (1) than its upper end.

8. The self-cleaning mechanism of the reel sprinkler according to claim 1, characterized in that: A drain pipe (12) is installed at the end of the first valve (11) away from the main pipe (1).

9. The self-cleaning mechanism of the reel sprinkler according to claim 1, characterized in that: Both the first valve (11) and the second valve (4) are electrically controlled valves.

10. A reel-type sprinkler irrigation machine, characterized in that: The self-cleaning mechanism of the reel sprinkler as described in any one of claims 1-9 further includes a reel, a sprinkler hose and a water trolley, wherein the sprinkler hose is wound around the reel, the sprinkler hose is connected to a water inlet pipe (100), the connecting pipe (41) of the self-cleaning mechanism is connected to the water inlet pipe (100), and the water outlet end of the sprinkler hose is connected to the water trolley.

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