Telescopic drop emitter

Abstract

A telescopic drip head comprises a first pipe connected to a main pipe, an enclosed platform provided at a distal end of the first pipe, and an inlet and outlet provided on the enclosed platform; a second pipe provided in the first pipe, a liquid outlet hole provided on the second pipe, and the second pipe at least partially inserted into the inlet and outlet; the second pipe is provided with a liquid passing platform, a plurality of liquid passing holes are provided on the liquid passing platform, and the second pipe is in communication with the outside through the liquid passing holes; a mud baffle is provided on the enclosed platform, the mud baffle is provided on the liquid passing platform, and a drip hole is provided on the mud baffle; the mud baffle is composed of a plurality of mud baffles, the mud baffles are provided along the circumferential direction of the first pipe, and the side walls of adjacent mud baffles are in engagement with each other; the piston can push the second pipe out of the first pipe against the elastic force of the spring under the action of water pressure, the second pipe pushes away the mud baffles, and the liquid outlet hole is in communication with the outside.

Description

Technical Field

[0001] This utility model belongs to the field of irrigation equipment technology, and in particular relates to a telescopic drip nozzle. Background Technology

[0002] In agricultural irrigation, drip irrigation heads are key equipment for achieving precision irrigation, and their performance directly affects irrigation efficiency and crop growth quality. Currently, drip irrigation heads on the market are mainly divided into two categories: fixed sprinkler heads and fixed drippers. Some products attempt to integrate sprinkler and drip irrigation functions, but they generally suffer from silt clogging problems, which seriously affect the service life of the equipment and irrigation effect.

[0003] The main drawbacks of existing technologies are as follows: First, the spray nozzles of fixed sprinkler heads are always exposed. During non-irrigation periods, impurities such as mud, sand, and weed debris in the field can easily enter the nozzles, causing blockages. Disassembly and cleaning are required for the next use, which is cumbersome and affects the irrigation progress. Second, although fixed drippers have smaller orifices that make it difficult for large particles to enter, fine mud and sand can still accumulate in the drip holes after long-term use, causing blockages that are more difficult to clean. Third, existing integrated sprinkler and drip irrigation devices mostly achieve functional switching through valve switching, which is complex in structure, expensive, and prone to jamming due to the accumulation of impurities.

[0004] To address the aforementioned clogging problem, the industry often uses the method of installing a filter screen at the water inlet to alleviate it. However, the filter screen can only filter large particles of impurities and cannot prevent fine mud and sand from entering the nozzle. After long-term use, the clogging problem still cannot be completely solved. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a telescopic drip nozzle to prevent clogging by mud and sand during non-working periods. At the same time, it utilizes the retracted structure to naturally form a drip irrigation function, simplifying the spray-drip switching structure and improving the reliability and service life of the equipment.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a telescopic drip nozzle, comprising... The first pipe is connected to the main pipe, and a sealing platform is provided at the end of the pipe away from the main pipe. The sealing platform is provided with an inlet and an outlet. The second tube is located inside the first tube and has liquid outlet holes arranged in multiple rows along the circumference of the second tube. One end of the second tube has a piston part that slides inside the first tube and has a liquid inlet hole. The inner cavity of the second tube is connected to the main pipe through the liquid inlet hole. A closed movable space is provided between the piston part and the sealing platform, and the spring is provided in the movable space. The two ends of the spring press against the sealing platform and the piston part. The second tube is at least partially inserted into the inlet and outlet; The second tube is provided with a liquid passage platform, on which a plurality of liquid passage holes are opened, and the second tube communicates with the outside through the liquid passage holes; The sealing platform is provided with a mudguard, which covers the liquid passage platform and has a drip hole. The mudguard is composed of multiple mudguards, which are provided along the circumference of the first tube, and the sidewalls of adjacent mudguards are joined together. The piston can resist the spring force under the action of water pressure to push the second tube out of the first tube, the second tube pushes open the mudguard, and the liquid outlet is connected to the outside.

[0007] Preferably, the mudguards are arc-shaped plates, which are joined together to form a mudguard cover, and the mudguard cover is an arc-shaped cover.

[0008] Preferably, the mudguard is an elastic plate.

[0009] Preferably, one end of the mudguard is hinged to the closed platform via a hinge shaft, and a torsion spring is provided at the connection between the mudguard and the closed platform. The two ends of the torsion spring are respectively fixed to the mudguard and the hinge shaft, and the other end is provided with a notch. The notch of the mudguard surrounds and forms the drip hole.

[0010] Preferably, the notch is provided with scraping teeth.

[0011] Preferably, the mudguard is covered with a rubber layer.

[0012] Preferably, the liquid passage holes and drip holes are arranged alternately.

[0013] The technical effects of this utility model are as follows: 1. Improved anti-clogging performance: When not in operation, the mudguard closes the liquid passage platform through multiple elastic mudguards, isolating impurities such as mud, sand, and weeds from contacting the liquid passage and outlet. In conjunction with the scraping teeth at the notch of the mudguard, mud and sand adhering to the outer wall can be scraped off when the second pipe extends or retracts. At the same time, the liquid passage and drip holes are staggered, which can reduce the deposition of impurities during drip irrigation. Compared with traditional filter screen protection, it forms a triple anti-clogging guarantee of "external barrier + extension scraping + hole anti-accumulation", which greatly reduces the risk of clogging.

[0014] 2. While achieving automated switching between spray and drip irrigation, the structure remains reliable. The second tube automatically extends and retracts using water pressure and a spring, allowing for seamless switching between spray irrigation (water pressure pushes the second tube out, opening the mudguard and allowing spraying from the outlet) and drip irrigation (the spring returns to its original position after the water pressure disappears, the mudguard closes, and the drip outlet begins dripping) without manual operation. This solves the cumbersome problem of traditional manual switching. The mudguard uses an arc-shaped elastic structure connected by a hinge shaft and torsion spring, ensuring smooth opening and closing and precise resetting. A rubber layer further enhances the sealing and mud-proofing effect. The overall structure eliminates the need for complex valves, significantly improving switching stability and service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the present invention.

[0017] Figure 3 This is a partial structural schematic diagram of the present invention.

[0018] The main technical features in the figure are labeled as follows: 1. First pipe; 2. Second pipe; 3. Sealing platform; 4. Inlet and outlet; 5. Liquid outlet; 6. Piston part; 7. Liquid inlet; 8. Moving space; 9. Spring; 10. Liquid passage platform; 11. Liquid passage hole; 12. Mudguard; 13. Mudguard plate; 14. Drip hole; 15. Torsion spring. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0020] like Figures 1-3 A telescopic drip nozzle includes a first pipe 1 and a second pipe 2. The upper end of the first pipe 1 is installed on the main pipe. The installation method can be similar to the electrofusion or heat fusion of pipes and fittings, or it can be connected by pipe thread. The main pipe can be connected to a booster pump according to the water pressure requirements. The lower end of the first pipe 1 is fixedly connected to a sealing platform. The sealing platform 3 has an inlet and outlet 4 in the center.

[0021] Furthermore, the second tube 2 is located inside the first tube 1, and its outer wall is provided with liquid outlet holes 5. Multiple rows of liquid outlet holes 5 are provided along the circumference of the second tube 2. A piston part 6 is provided at one end of the second tube 2 near the main pipe. The piston part 6 is integrally fixed to the second tube 2, and its outer wall is covered with a rubber layer. The outer wall of the piston is pressed against the inner wall of the first tube 1, and the piston and the inner wall of the first tube 1 are in sliding contact.

[0022] Furthermore, the second tube 2 is located inside the first tube 1, and its outer wall is provided with liquid outlet holes 5. Multiple rows of liquid outlet holes 5 are provided along the circumference of the second tube 2. A piston part 6 is provided at one end of the second tube 2 near the main pipe. The piston part 6 is integrally fixed to the second tube 2, and its outer wall is covered with a rubber layer. The outer wall of the piston is pressed against the inner wall of the first tube 1, and the piston and the inner wall of the first tube 1 are in sliding contact.

[0023] Furthermore, the other end of the second tube 2 away from the piston part 6 is provided with a liquid passage platform 10. The liquid passage platform 10 is fitted through the inlet and outlet 4 and has liquid passage holes 11. Multiple liquid passage holes 11 are arranged in a ring around the center of the liquid passage platform 10. Furthermore, a mudguard 12 is provided in front of the liquid-passing platform 10 that protrudes from the first pipe 1. The mudguard 12 is an arc-shaped cover, composed of multiple arc-shaped mudguards 13. These mudguards 13 are evenly arranged along the circumference of the first pipe 1, and the sidewalls of adjacent mudguards 13 are completely mated together. The mudguards 13 are elastic plates, made of a material similar to that of existing leaf springs, such as bronze or stainless steel, and their surface can be covered with a rubber layer. One end of the mudguard 13... The mudguard 13 is hinged to the closed platform 3 via a hinge shaft, and a torsion spring 15 is provided at the connection between the mudguard 13 and the closed platform 3. The two ends of the torsion spring 15 are respectively fixed to the mudguard 13 and the hinge shaft, and the other end is provided with a notch. The notch is an arc-shaped notch. The notch of the mudguard 13 surrounds and forms a circular drip hole 14. The drip hole 14 is located at the center of the mudguard 12. The liquid passage hole 11 is located around the drip hole 14 and is staggered to avoid the liquid passage hole 11 and the drip hole 14 being directly connected.

[0024] Furthermore, the notch is provided with scraping teeth, which can, to a certain extent, cooperate with the extension and retraction of the second tube 2 to scrape off the mud and sand attached to its outer wall.

[0025] The specific implementation process of this utility model is as follows: When spraying is required, the main pipe is pressurized, and the water pressure pulse will first act on the piston. Since the flow rate of the inlet hole 7 is small, the water pressure will act on the piston. Under the action of water pressure, the piston can resist the elastic force of the spring and push the second pipe 2 outward to the first pipe 1 to a specific position. The liquid passage platform 10 will push open the mudguard 12, the mudguard plate 13 will open, and the liquid outlet hole 5 will be exposed to the external space for spraying. As needed, the extreme position of the piston can be finely adjusted by adjusting the water pressure through the valve, thereby controlling the number of exposed liquid outlet holes 5. When no work is required, the water pressure disappears, and the second pipe 2 retracts into the first pipe 1 under the action of the spring 9. The mudguard plate 13 closes, and the second pipe 2 is only connected to the outside through the liquid passage hole 11 and the drip hole 14. Water can drip through the drip hole 14.

[0026] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. The present utility model can be used in similar products. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A telescopic drip nozzle, characterized in that: include The first pipe (1) is connected to the main pipe, and a closed platform (3) is provided at the end away from the main pipe. The closed platform (3) is provided with an inlet and outlet (4). The second tube (2) is located inside the first tube (1) and has an outlet hole (5) on it. Multiple rows of outlet holes (5) are provided along the circumference of the second tube (2). One end of the second tube (2) is provided with a piston part (6), which slides inside the first tube (1). An inlet hole (7) is provided on the piston part (6), and the inner cavity of the second tube (2) is connected to the main pipe through the inlet hole (7). A closed movable space (8) is provided between the piston part (6) and the closed platform (3). A spring (9) is provided in the movable space (8), and the two ends of the spring (9) press against the closed platform (3) and the piston part (6). The second tube (2) is at least partially inserted into the inlet / outlet (4); The second tube (2) is provided with a liquid passage platform (10), which has several liquid passage holes (11) and the second tube (2) is connected to the outside through the liquid passage holes (11); The closed platform (3) is provided with a mudguard (12), which covers the liquid passage platform (10) and has a drip hole (14) on it; the mudguard (12) is composed of multiple mudguards (13), and multiple mudguards (13) are provided along the circumferential direction of the first pipe (1), and the side walls of adjacent mudguards (13) are joined together. The piston can resist the spring force under the action of water pressure and push the second tube (2) outward from the first tube (1). The second tube (2) pushes open the mudguard (13), and the liquid outlet (5) is connected to the outside.

2. A telescopic drip nozzle according to claim 1, characterized in that: The mudguard (13) is an arc-shaped plate, which are joined together to form a mudguard cover (12), and the mudguard cover (12) is an arc-shaped cover.

3. A telescopic drip nozzle according to claim 1, characterized in that: The mudguard (13) is an elastic plate.

4. A telescopic drip nozzle according to claim 1, characterized in that: One end of the mudguard (13) is hinged to the closed platform (3) via a hinge shaft. A torsion spring (15) is provided at the connection between the mudguard (13) and the closed platform (3). The two ends of the torsion spring (15) are respectively fixed to the mudguard (13) and the hinge shaft. The mudguard (13) has a notch at the end away from the hinge shaft. The notches of multiple mudguards (13) are enclosed to form the drip hole (14).

5. A telescopic drip nozzle according to claim 4, characterized in that: The notch is provided with scraping teeth.

6. A telescopic drip nozzle according to claim 1, characterized in that: The mudguard (13) is covered with a rubber layer.

7. A telescopic drip nozzle according to claim 1, characterized in that: The liquid passage (11) and the dripping hole (14) are arranged alternately.

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