Pressure compensation anti-backflow buried sprinkler

Abstract

The present invention relates to a pressure-compensated anti-backflow buried irrigation device, comprising a cylindrical dripper body, a plurality of water inlet holes are arranged on each end face of the cylindrical dripper body, a water outlet area is arranged in the middle of the side wall of the cylindrical dripper body, and anti-backflow turbulence areas are arranged on both sides of the water outlet area; the anti-backflow turbulence area comprises a labyrinth flow channel and a first settling tank connected to the plurality of water inlet holes and arranged along the circumference of the cylindrical dripper body, the first settling tank is connected to a water chamber, and an anti-backflow whistle for connecting the water chamber and the labyrinth flow channel is installed in the water chamber. The present invention has good anti-backflow and anti-blocking effects, prevents roots from entering the water outlet hole, and has a long service life.

Description

Technical Field

[0001] The invention relates to the technical field of water-saving irrigation, in particular to a pressure-compensating anti-backflow buried irrigator. Background Art

[0002] Underground drip irrigation has become the first choice for high-standard farmland in various places. It can be put into use all year round without affecting farmland cultivation. It can realize precise and fully intelligent irrigation. At the same time, the yield and quality of crops are improved. Underground drip irrigation has become an important condition for the design of high-standard farmland irrigation. It has obvious effects on saving water, fertilizer and labor. Underground drip irrigation has incomparable advantages over traditional irrigation methods.

[0003] At present, when the drippers of existing buried drip irrigation pipes are in use, when the system stops supplying water, negative pressure is generated in the drip irrigation pipe, which can easily cause the mud and sand particles around the drippers to be sucked into the drippers through the water outlet holes, and then flow back into the maze flow channel of the drippers with the water, thereby causing the drippers to be blocked, affecting normal irrigation work and shortening the service life of the drippers. Summary of the invention

[0004] The invention aims at the deficiencies of the prior art and provides a pressure-compensating anti-backflow buried sprinkler.

[0005] The present invention is achieved through the following technical scheme, providing a pressure-compensated anti-backflow buried irrigation device, including a cylindrical dripper body, a plurality of water inlet holes are arranged on each end face of the cylindrical dripper body, a water outlet area is arranged in the middle of the side wall of the cylindrical dripper body, and anti-backflow turbulence areas are respectively arranged on both sides of the water outlet area; the anti-backflow turbulence area includes a labyrinth flow channel and a first sedimentation trough connected with the plurality of water inlet holes and arranged along the circumference of the cylindrical dripper body, the first sedimentation trough is connected with a water chamber, and an anti-backflow whistle nozzle for connecting the water chamber with the labyrinth flow channel is installed in the water chamber.

[0006] Preferably, the water chamber is connected to the water inlet end of the labyrinth flow channel through an anti-back-suction whistle nozzle, and the water outlet end of the labyrinth flow channel is connected to the water outlet area.

[0007] Preferably, the anti-back-suction whistle nozzle comprises an elastic bottom plate, two elastic vertical plates fixed on the elastic bottom plate, and at least one elastic opening and closing member is arranged between the two elastic vertical plates;

[0008] Each elastic opening and closing member includes two tongues arranged opposite to each other, one end of the two tongues is fixed to an elastic vertical plate respectively, and the other ends gradually approach each other until they are in contact, and a water outlet is formed at the contact position, and the water outlet can be opened under pressure.

[0009] Preferably, the elastic bottom plate is fixed on the side wall of the cylindrical dripper body, and the bottom of the elastic bottom plate is a pressure compensation regulating port, which is connected to the inner cavity of the cylindrical dripper body. The water in the inner cavity of the cylindrical dripper body acts on the elastic bottom plate through the pressure compensation regulating port, and the water in the water chamber and the water in the inner cavity of the cylindrical dripper body form a pressure difference on both sides of the elastic bottom plate. When the water pressure is high, the elastic bottom plate is pressed upward and deformed, so that the water flow area of ​​the water port becomes smaller. On the contrary, when the water pressure is low, the water flow area of ​​the water port becomes larger, thereby making the water flow entering the labyrinth flow channel constant, and realizing pressure compensation.

[0010] Preferably, the elastic upright plate is perpendicular to the elastic bottom plate, the two elastic upright plates are parallel to each other, and the bottom of the tongue piece is in close contact with the elastic upright plate.

[0011] Preferably, the top of the elastic vertical plate and the top of the tongue piece are both fixed to the inner wall of the drip irrigation pipe.

[0012] Preferably, the elastic bottom plate, elastic vertical plate and tongue are all injection molded from high-density polyethylene (HDPE) and thermoplastic elastomer (TPE). When the drip irrigation pipe is supplying water normally, the anti-backflow whistle automatically opens under the action of water pressure; when the drip irrigation pipe stops supplying water, the anti-backflow whistle automatically closes, and water will not flow in the maze flow channel, thereby achieving the purpose of anti-backflow and achieving the ultimate purpose of ultra-long-term use of buried drip irrigation. In this embodiment, the elastic opening and closing parts are two-way, double insurance for anti-backflow.

[0013] Preferably, a second sedimentation tank is arranged between the water chamber and the first sedimentation tank, the first sedimentation tank is connected to the second sedimentation tank, and a sedimentation retaining wall is arranged on both sides of the water chamber. The two sedimentation retaining walls separate the water chamber and the second sedimentation tank.

[0014] Preferably, a plurality of first notches are provided on the top surface of each sedimentation retaining wall for allowing water to enter the water chamber from the second sedimentation trough.

[0015] Preferably, the first sedimentation trough and the second sedimentation trough are surrounded by an end ring support and a support protrusion, and the water inlet hole passes through the end ring support. The top of the end ring support and the top of the support protrusion are both fixed to the drip irrigation pipe.

[0016] Preferably, the labyrinth flow channel is a continuous broken-line flow channel surrounded by tooth-shaped support walls, and a plurality of tooth-shaped protrusions are arranged on both side walls of the labyrinth flow channel, and the tooth-shaped protrusions on each side wall are evenly distributed along the side wall, and the tooth-shaped protrusions on the two side walls of the labyrinth flow channel are arranged alternately to make the water flow bend and flow. The water flow velocity is reduced to achieve turbulence, and the top of the tooth-shaped support wall is fixed to the inner wall of the drip irrigation pipe. The dripper of the present invention is provided with an extra-long labyrinth flow channel, which greatly improves the energy dissipation turbulence effect of the sprinkler, and once again increases the precipitation space of tiny particles, achieving the effect of ultra-long-term use.

[0017] Preferably, an annular support wall is arranged between the water outlet area and each anti-backflow turbulence area, and each annular support wall is arranged circumferentially along the outer wall of the dripper, and the annular support wall separates the anti-backflow turbulence area and the water outlet area; and a plurality of second slots are provided on the top surface of each annular support wall to allow water to flow from the maze flow channel into the water outlet area.

[0018] Preferably, the plurality of second notches are distributed circumferentially along the annular support wall.

[0019] Preferably, the top of the annular support wall is fixed to the inner wall of the drip irrigation pipe.

[0020] Preferably, water outlet holes are provided on the wall of the drip irrigation pipe corresponding to the water outlet area, and the water outlet holes are multiple and arranged in a circle along the circumference of the drip irrigation pipe.

[0021] Preferably, the number of water outlet holes in each circle is 25-35, and the diameter of each water outlet hole is 0.1 mm. The small diameter of the water outlet hole can effectively prevent the plant roots in the soil from entering the water outlet hole and clogging the water outlet hole after burial.

[0022] The present invention creatively changes the water inlet holes to the two end surfaces of the cylindrical dripper body, which will not interfere with the layout of the labyrinth flow channel, greatly prolongs the length of the labyrinth flow channel, and achieves a better turbulent flow effect.

[0023] The present invention adopts the method of letting water in from both side end faces at the same time and each end face has multiple water inlet holes arranged circumferentially, which greatly reduces the probability of water inlet hole clogging. Compared with the traditional dripper with one water inlet hole, the anti-clogging effect of the water inlet hole is improved by dozens of times, solving the first problem of water inlet clogging during long-term use.

[0024] The present invention provides a first sedimentation tank, and water first enters the first sedimentation tank through a water inlet hole, so that tiny suspended particles in the water have a turbulent sedimentation environment. The water in the first sedimentation tank first enters the second sedimentation tank before entering the water chamber, and the suspended particles are further settled through the sedimentation retaining wall in the second sedimentation tank. The water is sedimented twice before entering the water chamber, which avoids tiny suspended particles in the water from entering the maze flow channel to the greatest extent possible, greatly improving the service life of the dripper, thereby achieving the purpose of ultra-long-term underground use.

[0025] When the drip irrigation pipe is supplying water normally, the drip irrigation pipe is under positive pressure. Water enters the first sedimentation tank from the water inlet hole, then enters the second sedimentation tank, and enters the water chamber after two sedimentations. The anti-backflow whistle is opened to enter the turbulent flow of the labyrinth flow channel, and then enters the water outlet area through the second notch, and the water is discharged through the water outlet hole on the wall of the drip irrigation pipe. When the water supply in the drip irrigation pipe stops, the anti-backflow whistle is closed. At this time, the drip irrigation pipe is under negative pressure, and the water in the labyrinth flow channel will not flow back, so the sediment will not be sucked back from the water outlet hole on the drip irrigation pipe. Even if a small negative pressure is generated in the labyrinth flow channel, and a small amount of sediment enters the water outlet area from the water outlet hole, the existence of two annular support walls can block the trace sediment in the water outlet area, prevent sediment from entering the labyrinth flow channel, avoid clogging the labyrinth flow channel, and extend the service life. At the same time, the two annular support walls can support the drilling when drilling and enhance the stability of the drilling. After the drip irrigation pipe wraps the cylindrical dripper, its material will shrink, so that the pipe wall of the drip irrigation pipe will tightly wrap the water outlet area, which makes it particularly easy to hit the cylindrical dripper body when drilling, causing the cylindrical dripper body to be scrapped. The setting of the two annular support walls can support the pipe wall of the drip irrigation pipe corresponding to the water outlet area, so that the pipe wall and the cylindrical dripper body maintain a certain distance, avoiding hitting the cylindrical dripper body when drilling.

[0026] The beneficial effects of the present invention are:

[0027] 1. Through the structural design of the present invention, better anti-backflow and anti-clogging effects can be achieved, roots can be prevented from entering the water outlet, and the service life of the dripper can be greatly extended; the ultra-long maze flow channel has strong pressure reduction turbulence and stable and uniform flow, which is suitable for ultra-long distance laying; the present invention has a simple structure and low production cost, and is easy to promote and apply.

[0028] 2. The special structure of the anti-back-suction whistle nozzle. When the drip irrigation pipe is supplying water normally, the anti-back-suction whistle nozzle will automatically open under the action of water pressure; when the drip irrigation pipe stops supplying water and generates negative pressure, the anti-back-suction whistle nozzle will automatically close, and water will not flow in the maze flow channel, thereby achieving the purpose of anti-back-suction and the ultimate goal of ultra-long-term use of buried drip irrigation.

[0029] 3. The present invention uses water to enter both end faces at the same time. Each end face has multiple water inlet holes arranged circumferentially, which greatly reduces the probability of water inlet hole blockage; water undergoes two sedimentation before entering the water chamber, which can avoid tiny suspended particles in the water from entering the maze flow channel as much as possible, greatly improving the service life of the dripper, thereby achieving the purpose of ultra-long-term underground use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view structural schematic diagram of the present invention;

[0031] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0032] Figure 3 It is a left-side structural schematic diagram of the present invention;

[0033] Figure 4 It is a right view structural schematic diagram of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the anti-backflow whistle nozzle;

[0035] Figure 6 It is a physical diagram of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the annular support wall of the present invention;

[0037] Figure 8 for Figure 2 A-axis cross-sectional structural diagram;

[0038] As shown in the figure:

[0039] 1. Water inlet, 2. Water outlet area;

[0040] 3. Anti-backflow turbulence area, 31. Labyrinth flow channel, 311. Tooth-shaped support wall, 312. Tooth-shaped protrusions,

[0041] 32. first sedimentation trough, 33. second sedimentation trough, 34. sedimentation retaining wall, 341. first notch, 35. water chamber, 36. anti-backflow whistle, 361. elastic bottom plate, 362. elastic vertical plate, 363. tongue, 364. water outlet, 365. pressure compensation regulating outlet;

[0042] 4. annular support wall, 41. second notch;

[0043] 5. End ring support, 6. Support protrusion. DETAILED DESCRIPTION

[0044] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0045] like Figure 1 , 2 As shown in Figures 3, 4 and 6, the present invention comprises a cylindrical dripper body, a plurality of water inlet holes 1 are arranged on each end face of the cylindrical dripper body, a water outlet area 2 is arranged in the middle of the side wall of the cylindrical dripper body, and anti-backflow turbulence areas 3 are arranged on both sides of the water outlet area 2. The water in the drip irrigation pipe enters the anti-backflow turbulence area 3 through the water inlet holes 1 at both ends of the cylindrical dripper body, and then enters the water outlet area 2 after turbulence.

[0046] The anti-backflow turbulence zone 3 includes a labyrinth flow channel 31 and a first settling tank 32 connected to a plurality of water inlet holes 1 and arranged along the circumference of the cylindrical dripper body. The first settling tank 32 is connected to a water chamber 35, and an anti-backflow whistle 36 for connecting the water chamber 35 with the labyrinth flow channel 31 is installed in the water chamber 35. The water chamber 35 is connected to the water inlet end of the labyrinth flow channel 31 through the anti-backflow whistle 36, and the water outlet end of the labyrinth flow channel 31 is connected to the water outlet zone 2.

[0047] A second sedimentation trough 33 is arranged between the water chamber 35 and the first sedimentation trough 32. The first sedimentation trough 32 is connected to the second sedimentation trough 33. A sedimentation retaining wall 34 is arranged on both sides of the water chamber 35. A plurality of first slots 341 for allowing water to enter the water chamber 35 from the second sedimentation trough 33 are arranged on the top surface of each sedimentation retaining wall 34. The two sedimentation retaining walls 34 separate the water chamber 35 from the second sedimentation trough 33.

[0048] like Figure 5 As shown, the anti-back-suction whistle 36 includes an elastic bottom plate 361, two elastic vertical plates 362 fixed on the elastic bottom plate 361, at least one elastic opening and closing piece is arranged between the two elastic vertical plates 362, and each elastic opening and closing piece includes two oppositely arranged tongue pieces 363, one end of the two tongue pieces 363 is respectively fixed to an elastic vertical plate 362, and the other ends gradually approach each other until they are in contact, and a water outlet 364 is formed at the contact portion, and the water outlet 364 can be opened under the action of pressure.

[0049] The elastic bottom plate 361 is fixed on the side wall of the cylindrical dripper body. The bottom of the elastic bottom plate 361 is a pressure compensation regulating port 365, and the pressure compensation regulating port 365 is communicated with the inner cavity of the cylindrical dripper body.

[0050] like Figure 8 As shown, the water in the inner cavity of the cylindrical dripper body acts on the elastic bottom plate 361 through the pressure compensation regulating port 365, and the water in the water chamber 35 and the water in the inner cavity of the cylindrical dripper body form a pressure difference on both sides of the elastic bottom plate 361. When the water pressure is high, the elastic bottom plate 361 is pressed upward and deformed, so that the water flow area of ​​the water port 364 becomes smaller. On the contrary, when the water pressure is low, the water flow area of ​​the water port 364 becomes larger, thereby achieving a constant water flow entering the labyrinth flow channel 31 and realizing pressure compensation.

[0051] The elastic upright plate 362 is perpendicular to the elastic bottom plate 361, the two elastic upright plates 362 are parallel to each other, and the bottom of the tongue piece 363 is in close contact with the elastic upright plate 362. The tops of the elastic upright plate 362 and the tongue piece 363 are both fixed to the inner wall of the drip irrigation pipe.

[0052] The elastic bottom plate 361, the elastic vertical plate 362 and the tongue piece 363 are all injection molded by high-density polyethylene (HDPE) and thermoplastic elastomer (TPE). When the drip irrigation pipe is supplying water normally, the anti-backflow whistle 36 automatically opens under the action of water pressure; when the drip irrigation pipe stops supplying water, the anti-backflow whistle 36 automatically closes, and water will not flow in the labyrinth flow channel, thereby achieving the purpose of anti-backflow and achieving the ultimate purpose of ultra-long-term use of buried drip irrigation. In this embodiment, the elastic opening and closing parts are two-way, double insurance for anti-backflow.

[0053] The first sedimentation tank 32 and the second sedimentation tank 33 are surrounded by the end annular support 5 and the support protrusion 6, and the water inlet hole 1 passes through the end annular support 5. The top of the end annular support 5 and the top of the support protrusion 6 are fixed to the drip irrigation pipe.

[0054] The water inlet hole 1 of the traditional cylindrical dripper body is located on the circumferential side wall of the dripper, which will shorten the design length of the labyrinth flow channel 31. The present invention creatively changes the water inlet hole 1 to the two end surfaces of the cylindrical dripper body, which will not interfere with the layout of the labyrinth flow channel 31, greatly extending the length of the labyrinth flow channel 31 and achieving a better turbulent flow effect.

[0055] In this embodiment, the number of water inlet holes 1 provided on each end face is 20. The present invention adopts water inlet from both end faces at the same time, and each end face has multiple water inlet holes 1 arranged along the circumferential direction, which greatly reduces the probability of water inlet hole 1 being blocked. Compared with the traditional dripper with one water inlet hole 1, the anti-blocking effect of water inlet hole 1 is improved by dozens of times, solving the first problem of water inlet blockage during long-term use.

[0056] The present invention is provided with a first sedimentation tank 32, and water first enters the first sedimentation tank 32 through the water inlet hole 1, so that tiny suspended particles in the water have a turbulent sedimentation environment. The water in the first sedimentation tank 32 first enters the second sedimentation tank 33 before entering the water chamber 35, and the suspended particles are further settled by the sedimentation retaining wall 34 in the second sedimentation tank 33. The water is precipitated twice before entering the water chamber 35, which avoids tiny suspended particles in the water from entering the maze flow channel 31 to the greatest extent possible, greatly improving the service life of the dripper, thereby achieving the purpose of ultra-long-term underground use.

[0057] The labyrinth flow channel 31 is a continuous broken-line flow channel surrounded by a toothed support wall 311. A plurality of toothed protrusions 312 are arranged on both side walls of the labyrinth flow channel 31. The toothed protrusions 312 on each side wall are evenly distributed along the side wall. The toothed protrusions 312 on the two side walls of the labyrinth flow channel 31 are alternately arranged to make the water flow bend and flow, reduce the water flow speed, and achieve turbulence. The top of the toothed support wall 311 is fixed to the inner wall of the drip irrigation pipe. The dripper of the present invention is provided with an extra-long labyrinth flow channel 31. In this embodiment, the length of the labyrinth flow channel 31 is 200 mm, which greatly improves the energy dissipation turbulence effect of the emitter and once again increases the precipitation space of tiny particles, achieving the effect of ultra-long-term use.

[0058] An annular support wall 4 is provided between the water outlet area 2 and each anti-backflow turbulence area 3. Each annular support wall 4 is provided along the circumference of the outer wall of the dripper. The annular support wall 4 separates the turbulence area from the water outlet area 2. The top of the annular support wall 4 is fixed to the inner wall of the drip irrigation pipe. Figure 7 As shown, a plurality of second notches 41 are provided on the top surface of each annular support wall 4 for allowing water to flow from the labyrinth flow channel 31 into the water outlet area 2, and the plurality of second notches 41 are distributed circumferentially along the annular support wall 4. Water outlet holes are provided on the wall of the drip irrigation pipe corresponding to the water outlet area 2, and the water outlet holes are arranged in a circle along the circumference of the drip irrigation pipe, and the number of water outlet holes in each circle is 25-35, and the diameter of each water outlet hole is 0.1 mm. The small diameter of the water outlet hole can effectively prevent the roots of plants in the soil from entering the water outlet hole and clogging the water outlet hole after being buried underground.

[0059] When the drip irrigation pipe is supplying water normally, the drip irrigation pipe is under positive pressure, and water enters the first sedimentation tank 32 from the water inlet hole 1, and then enters the second sedimentation tank 33. After two sedimentations, it enters the water chamber, and the anti-backflow whistle 36 is opened to enter the labyrinth flow channel 31 turbulent flow, and then enters the water outlet area 2 through the second notch 41, and the water is discharged through the water outlet hole on the wall of the drip irrigation pipe. When the drip irrigation pipe stops supplying water, the anti-backflow whistle 36 is closed, and the drip irrigation pipe is under negative pressure at this time, and the water in the labyrinth flow channel 31 will not flow back, so the silt will not be sucked back from the water outlet hole on the drip irrigation pipe. Even if a slight negative pressure is generated in the labyrinth flow channel 31, and a small amount of silt enters the water outlet area 2 from the water outlet hole, the existence of the two annular support walls 4 can block the small amount of silt in the water outlet area 2, prevent silt from entering the labyrinth flow channel 31, prevent the labyrinth flow channel 31 from being blocked, and extend the service life. At the same time, the two annular support walls 4 can play a role in supporting the drilling and enhancing the stability of the drilling. After the drip irrigation pipe wraps the cylindrical dripper, its material will shrink, so that the pipe wall of the drip irrigation pipe will tightly wrap the water outlet area 2, and it is particularly easy to hit the cylindrical dripper body during drilling, causing the cylindrical dripper body to be scrapped. The setting of the two annular support walls 4 can support the pipe wall of the drip irrigation pipe corresponding to the water outlet area 2, so that the pipe wall maintains a certain distance from the cylindrical dripper body, avoiding hitting the cylindrical dripper body during drilling.

[0060] Through the structural design of the present invention, better anti-backflow and anti-clogging effects can be achieved, the service life of the dripper can be greatly extended, and it can be used underground for 10 to 20 years; the ultra-long labyrinth flow channel 31 has strong pressure reduction turbulence and stable and uniform flow, and is suitable for ultra-long distance laying; the present invention has a simple structure and low production cost, and is easy to promote and apply.

[0061] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. Pressure compensation anti-backflow buried sprinkler, characterized by: The invention comprises a cylindrical dripper body, wherein a plurality of water inlet holes (1) are arranged on each end face of the cylindrical dripper body, a water outlet area (2) is arranged in the middle of the side wall of the cylindrical dripper body, and anti-back-inhalation turbulent flow areas (3) are arranged on both sides of the water outlet area (2); the anti-back-inhalation turbulent flow area (3) comprises a labyrinth flow channel (31) and a first sedimentation tank (32) connected to the plurality of water inlet holes (1) and arranged along the circumference of the cylindrical dripper body, the first sedimentation tank (32) is connected to a water chamber (35), and an anti-back-inhalation whistle (36) for connecting the water chamber (35) and the labyrinth flow channel (31) is installed in the water chamber (35); the anti-back-inhalation whistle (36) comprises an elastic bottom plate (361), two elastic vertical plates (362) fixed on the elastic bottom plate (361), and the two elastic vertical plates (362) are arranged on the sides of the two elastic vertical plates (363). At least one elastic opening and closing piece is arranged between the plates (362); each elastic opening and closing piece comprises two tongue pieces (363) arranged opposite to each other, one end of the two tongue pieces (363) is fixed to an elastic vertical plate (362) respectively, and the other ends gradually approach each other until they are in contact, and a water outlet (364) is formed at the contacting portion, and the water outlet (364) can be opened under the action of pressure; the elastic bottom plate (361) is fixed to the side wall of the cylindrical dripper body, the bottom of the elastic bottom plate (361) is a pressure compensation regulating port (365), and the pressure compensation regulating port (365) is connected to the inner cavity of the cylindrical dripper body; the elastic vertical plate (362) is perpendicular to the elastic bottom plate (361), the two elastic vertical plates (362) are parallel to each other, and the bottom of the tongue piece (363) is in close contact with the elastic vertical plate (362).

2. The pressure-compensating anti-backflow buried sprinkler according to claim 1, characterized in that: The water chamber (35) is connected to the water inlet end of the labyrinth flow channel (31) through the anti-backflow whistle nozzle (36), and the water outlet end of the labyrinth flow channel (31) is connected to the water outlet area (2).

3. The pressure-compensating anti-backflow buried sprinkler according to claim 1, characterized in that: A second sedimentation tank (33) is arranged between the water chamber (35) and the first sedimentation tank (32), the first sedimentation tank (32) is connected to the second sedimentation tank (33), and a sedimentation retaining wall (34) is arranged on both sides of the water chamber (35).

4. The pressure-compensating anti-backflow buried sprinkler according to claim 3, characterized in that: A plurality of first notches (341) are provided on the top surface of each sedimentation retaining wall (34) for allowing water to enter the water chamber (35) from the second sedimentation trough (33).

5. The pressure-compensating anti-backflow buried sprinkler according to claim 1, characterized in that: The labyrinth flow channel (31) is a continuous folded-line flow channel surrounded by tooth-shaped support walls (311). A plurality of tooth-shaped protrusions (312) are arranged on both side walls of the labyrinth flow channel (31). The tooth-shaped protrusions (312) on each side wall are evenly distributed along the side wall. The tooth-shaped protrusions (312) on the two side walls of the labyrinth flow channel (31) are alternately arranged to allow water to flow in a curved manner.

6. The pressure-compensating anti-backflow buried sprinkler according to claim 1, characterized in that: An annular support wall (4) is provided between the water outlet area (2) and each anti-backflow turbulence area (3), each annular support wall (4) is provided along the circumference of the outer wall of the dripper, and the annular support wall (4) separates the anti-backflow turbulence area (3) and the water outlet area (2); A plurality of second notches (41) are provided on the top surface of each annular supporting wall (4) for allowing water to flow from the labyrinth flow channel (31) into the water outlet area (2).

7. The pressure-compensating anti-backflow buried sprinkler according to claim 6, characterized in that: Water outlet holes are provided on the wall of the drip irrigation pipe corresponding to the water outlet area (2), and the water outlet holes are multiple and arranged in a circle along the circumference of the drip irrigation pipe.

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