Dual-mode switching garden spraying faucet

Abstract

The invention discloses a dual-mode switching garden spraying faucet, and belongs to the technical field of spraying faucets. Comprising a spray head seat, a spray head, a dual-mode switching unit and a liquid inlet pipe seat, an inner ring flow channel is formed in the middle of the spray head seat, and an outer ring flow channel is formed in the position, outside the inner ring flow channel, of the spray head seat; a plurality of flow collecting channels converging towards the center of the spray head seat are arranged on the inner side of the inner ring flow channel at intervals; a first threaded opening communicating with the flow collecting channel is formed in the center of the top of the spray head base. A plurality of scattering runners far away from the center of the spray head seat are arranged on the outer ring runner at intervals; a plurality of second threaded openings communicated with the scattering runner are radially formed in the outer part of the spray head seat; the spraying head comprises a Venturi accelerating tube which is screwed with the first threaded opening and a scattering spraying head which is screwed with the second threaded opening; according to the dual-mode switching garden spraying faucet, mode switching can be automatically carried out, the spraying area can be enlarged through the spraying faucet, uniform spraying in the spraying area can be guaranteed, and in addition, high-position spraying can be achieved.

Description

Technical Field

[0001] The invention specifically relates to a dual-mode switching garden spray faucet, and belongs to the technical field of spray faucets. Background Art

[0002] In garden irrigation, a spray faucet is often required to cover an area with itself as the dot. During the spraying process, the area is often sprayed unevenly. Since most existing spray faucets have only the functions of opening and closing, their spray radius and spraying area cannot be flexibly adjusted. Therefore, in order to avoid the uneven spraying, the faucet arrangement density is often increased when the spray system is laid out, so that the spraying coverage areas of adjacent faucets overlap with each other, thereby reducing the probability of uneven spraying. Alternatively, artificial leak repair is used to eliminate the uneven spraying. However, both methods have shortcomings. For this reason, China Patent Authorization Announcement No.: CN107398363B, Publication No.: CN107398363B The invention discloses a dual-mode switching garden spray faucet, comprising a cylindrical spray head, one end of the spray head is a two-level stepped boss, the other end of the spray head is concave to form a chamber, an inner circle flow channel and an outer circle flow channel are arranged on the spray head, the number of the inner circle flow channel and the outer circle flow channel are both 2 at most, the axes of the inner circle flow channel and the outer circle flow channel and the axis of the spray head are arranged in the same plane; a switching disk is sleeved on the positioning shaft at the center position of the bottom of the chamber, the dual-mode switching garden spray faucet has two modes, which can be switched according to actual needs when in use, and the spraying area can be flexibly adjusted; but when switching the modes, the structure needs to manually rotate the switching switch, and due to the large number of spray faucets, the workload of switching the modes back and forth is large. In addition, the spray faucet cannot perform high-position spraying. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a dual-mode switching garden spray faucet, which can automatically switch modes. The spray faucet can expand the spraying area and ensure uniform spraying in the spraying area, and can also achieve high-position spraying.

[0004] The dual-mode switching garden spray faucet of the present invention comprises: A nozzle seat, wherein an inner ring flow channel is provided in the middle of the nozzle seat, and an outer ring flow channel is provided outside the inner ring flow channel; a plurality of collecting channels converging to the center of the nozzle seat are arranged at intervals inside the inner ring flow channel; a first threaded opening connected to the collecting channel is provided at the center of the top of the nozzle seat; a plurality of scattering flow channels away from the center of the nozzle seat are arranged at intervals on the outer ring flow channel; a plurality of second threaded openings connected to the scattering flow channels are radially provided outside the nozzle seat; Sprinkler head, the sprinkler head includes a Venturi acceleration tube screwed to the first threaded port, and a scattering nozzle screwed to the second threaded port; the coverage angle of the scattering nozzle is 120°; a pressure jet nozzle is screwed to the top of the Venturi acceleration tube, and the pressure jet nozzle is a rotating nozzle or a directional nozzle fixed to the top of the Venturi acceleration tube; Dual-mode switching unit, the dual-mode switching unit includes an annular first elastic silicone; a skirt is integrally formed on the outside of the first elastic silicone, a gland is provided at the bottom of the first elastic silicone, and the gland is fixed to the nozzle seat by bolts; a V-shaped through hole is opened at the center of the gland; a core seat is movably fitted inside the V-shaped through hole; a core column movably penetrates through the middle of the core seat, one end of the core column is screwed to the center of the bottom surface of the nozzle seat, and the other end is screwed with a limit nut, and the limit nut abuts against the bottom of the core seat; an elastic member is provided between the core column and the nozzle seat and the core seat; the Shore hardness of the first elastic silicone is A50; Liquid inlet pipe seat, the liquid inlet pipe seat is fixed to the bottom of the nozzle seat by a flange.

[0005] During operation, the liquid inlet pipe seat injects pressurized water flow into the bottom of the nozzle seat. Then, the dual-mode switching unit operates. When the water pressure is lower than the deformation of the skirt, the water flow enters the flow channel formed by the skirt and the outer ring flow channel inlet, and enters the scattering flow channel through the outer ring flow channel, and then is atomized and sprayed through the scattering flow channel and the scattering nozzle. The atomized water has a coverage angle of 120°; When the water pressure reaches the opening deformation pressure of the skirt, the water flow enters the flow channel formed by the skirt and the outer ring flow channel inlet. At this time, the skirt deforms and the flow channel shrinks. At the same time, the elastic member begins to deform, and the core seat slides along the core column. The water flow enters the flow channel formed by the core seat and the core column, enters the inner ring flow channel, and enters the first threaded port through the collecting flow channel. After being pressurized by the Venturi acceleration tube, the high-pressure water is directionally sprayed or rotated and sprayed at a high position through the pressure jet nozzle, spraying from low to high or continuously expanding the spraying area; when the water pressure is continuously pressurized, the outer ring flow channel is closed by the skirt. At this time, all the water flow enters the inner ring flow channel and enters the Venturi acceleration tube. At this time, the pressure jet nozzle is in the fully open mode; the low-pressure mode spraying, the low-pressure to high-pressure mode switching spraying and the high-pressure mode spraying of the sprinkler head are completed; by adjusting the water pressure, the mode can be automatically switched, the spraying area can be expanded and the spraying height can be increased, and uniform spraying within the spraying area can be ensured.

[0006] Further, it also includes a sealing base. A wedge-shaped sealing ring is arranged between the nozzle base and the liquid inlet pipe base. The skirt is arranged opposite to the sealing ring. When the water pressure on the skirt is <0.3 Mpa, a flow channel is arranged between the skirt and the sealing ring; when the water pressure on the skirt is ≥0.3 Mpa, the skirt is deformed under pressure and pressed against the sealing ring to close the outer ring flow channel; an annular plate is integrally formed on the upper part inside the liquid inlet pipe base, and a honeycomb filter screen is pressed at the bottom of the annular plate; a flow guide cover is pressed at the bottom of the honeycomb filter screen; the bottom of the flow guide cover movably penetrates through the sealing base; and a metal braided pipe that abuts against the bottom of the sealing base is screwed; the sealing base and the liquid inlet pipe base are fixed by a flange; an inserting pipe that fits with the inner wall of the liquid inlet pipe base and presses against the flow guide cover is integrally formed on the top of the sealing base; the metal braided pipe is connected to a pressure supply water pipe; the sealing ring has a Shore hardness A70 and a compression rate of 30±2%; During operation, the input end of the pressure supply water pipe is regulated by a pressure regulating valve, and the set water pressure enters the pressure supply water pipe and is distributed to each metal braided pipe. Then, the pressure water flow enters the flow guide cover through the metal braided pipe, and after being filtered by the honeycomb filter screen, the water flow enters the dual-mode switching unit. When the water flow pressure is lower than the deformation of the skirt and the elastic deformation of the elastic member, the water flow enters the outer ring flow channel from the flow channel formed between the sealing ring and the skirt; when the water flow reaches the water pressure for the skirt to deform, the skirt begins to deform, and at the same time, the elastic member begins to deform synchronously. The water flow enters the inner ring flow channel from the flow channel between the V-shaped through hole and the core base, realizing the synchronous water inlet of the inner ring flow channel and the outer ring flow channel. As the water flow pressure continues to rise, the flow channel formed between the sealing ring and the skirt gradually shrinks, and the inner ring flow channel gradually increases until the outer ring flow channel is completely closed and the inner ring flow channel is fully opened; when the core base operates, it slides linearly through the core column.

[0007] Further, a plurality of support feet are fixed to the bottom of the sealing base, and the support feet are fixed to the garden ground; the spraying faucet can be fixed to the garden ground through the support feet.

[0008] Further, the elastic member is a second elastic silica gel or a spring body; through the elastic deformation of the second elastic silica gel or the compression of the spring body, the deformation of the elastic member is realized, and an inlet for the inner ring flow channel is formed at the front end of the gland.

[0009] Further, a limit pipe seat is integrally formed on the top of the gland, and the inner wall of the limit pipe seat is flush with the inner edge of the inner ring flow channel. The first elastic silica gel is movably fitted with the outside of the limit pipe seat; an annular notch for accommodating the first elastic silica gel is formed by the gland, the limit pipe seat and the nozzle base, avoiding the compression deformation of the first elastic silica gel caused by being pressed by the gland when the first elastic silica gel is fixed to the nozzle base.

[0010] Furthermore, both the manifold channel and the scattering channel include straight guiding sections, and an inclined channel is integrally formed at the top of the straight guiding section; when the pressurized water enters the nozzle base, the straight guiding sections of the manifold channel and the scattering channel first direct the water flow, and the water flow is directed into the corresponding sprinkler head through the inclined channel.

[0011] Furthermore, the pressure jet nozzle is fixed to the top of the Venturi acceleration tube by a flange or thread, and the pressure jet nozzle and the Venturi acceleration tube can be assembled into one by a flange or thread; the directional nozzle includes a guiding tube section inclined upward, and a pressure nozzle is fixed at the front end of the guiding tube section; when the directional nozzle is installed, the inclination angle of the guiding tube section can be selected according to the height of the top of the tree, so that the high-pressure water can be sprayed directly above the tree.

[0012] Furthermore, an outer sleeve is fitted outside the Venturi acceleration tube, and the bottom of the outer sleeve is fixed to the top of the nozzle base by a flange; the outer sleeve can protect the Venturi acceleration tube, which can not only avoid the fluctuation of the installation position of the Venturi acceleration tube caused by the impact of the internal fluid, but also avoid the deformation of the Venturi acceleration tube caused by external impact.

[0013] Furthermore, the inlet diameter of the Venturi acceleration tube is 8 ± 0.1 mm, the cone angle of the contraction section is 15 ± 0.5°, the throat length is 5 ± 0.2 mm, the diameter is 3 ± 0.05 mm, the diffusion section length is 20 ± 1 mm, and the cone angle is 8 ± 0.5°.

[0014] Furthermore, the diameter of the manifold channel is 8 mm, which is symmetrically distributed along the central axis of the nozzle base, and the end is connected to the inlet of the Venturi acceleration tube; the thickness gradient of the skirt is 0.8 mm to 2 mm, and its deformation amount is ≥ 1.5 mm under the water pressure of 0.3 MPa.

[0015] Furthermore, when the dual-mode switching unit is in the low-pressure stage of 0 - 0.1 Mpa, the water pressure is not enough to overcome the elastic resistance of the silica gel, the skirt remains undeformed, and the water flow is ejected through the scattering nozzle with a coverage angle of 120°; when the dual-mode switching unit is in the high-pressure stage of ≥ 0.3 MPa, the skirt deforms upward to close the inlet of the outer ring channel; the water flow is concentrated through the inner ring channel and is ejected at a high speed through the Venturi acceleration tube with a range of ≥ 8 m; when the water pressure of the dual-mode switching unit is greater than > 0.1 Mpa and < 0.3 Mpa, the flow rate ratio of the inner ring channel and the outer ring channel can be linearly adjusted from 0 to 100%.

[0016] Compared with the prior art, the dual-mode switching garden sprinkler faucet of the present invention can adjust the water pressure of the water supply network according to the sprinkling requirements and can automatically switch modes. When working in the high-pressure mode, the sprinkler faucet can work in the high-pressure mode to achieve the cleaning and irrigation of tall trees or expand the irrigation area of lower-layer shrubs and lawns. When working in the low-pressure mode, it conducts wide-area atomized irrigation of lower-layer shrubs and lawns to avoid water resource waste. When working in the transition mode between the high-pressure mode and the low-pressure mode, it can linearly adjust the flow rate ratio of the inner flow channel and the outer flow channel to 0-100%, ensuring uniform sprinkling within the entire sprinkling area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of the dual-mode switching garden sprinkler faucet of the present invention installed with a rotary sprinkler.

[0018] Figure 2 FIG. is a schematic structural diagram of the dual-mode switching garden sprinkler faucet of the present invention installed with a fixed sprinkler.

[0019] Figure 3 FIG. is a schematic structural diagram of the dual-mode switching garden sprinkler faucet of the present invention installed with a rotary sprinkler and an outer casing.

[0020] Figure 4 FIG. is a schematic cross-sectional structural diagram of the dual-mode switching garden sprinkler faucet of the present invention with a spring body installed inside.

[0021] Figure 5 For the present invention Figure 4 Partial enlarged structural diagram at position A.

[0022] Figure 6 FIG. is a schematic cross-sectional structural diagram of the dual-mode switching garden sprinkler faucet of the present invention with a second elastic silica gel installed inside.

[0023] Figure 7 For the present invention Figure 6 Partial enlarged structural diagram at position B.

[0024] Figure 8 FIG. is a schematic cross-sectional structural diagram of the dual-mode switching garden sprinkler faucet of the present invention with a limit pipe seat installed inside.

[0025] Figure 9 For the present invention Figure 8 Partial enlarged structural diagram at position C.

[0026] Figure 10 FIG. is a schematic cross-sectional structural diagram of the dual-mode switching garden sprinkler faucet of the present invention installed with a rotary sprinkler.

[0027] Figure 11 FIG. is a schematic cross-sectional structural diagram of the dual-mode switching garden sprinkler faucet of the present invention installed with a fixed sprinkler.

[0028] Reference numerals: 1, nozzle seat; 2, inner ring flow channel; 3, outer ring flow channel; 4, collecting flow channel; 5, first threaded port; 6, scattering flow channel; 7, Venturi acceleration tube; 8, scattering nozzle; 9, rotating nozzle; 10, directional nozzle; 11, first elastic silica gel; 12, skirt; 13, gland; 14, core seat; 15, core column; 16, limit nut; 17, liquid inlet pipe seat; 18, sealing base; 19, sealing ring; 20, ring plate; 21, honeycomb filter; 22, flow guiding cover; 23, metal braided tube; 24, support leg; 25, limit tube seat; 26, outer sleeve body; 27, second elastic silica gel; 28, spring body. Detailed implementation manners

[0029] Embodiment: As Figures 1 to 11 shown, the dual-mode switching garden sprinkler faucet includes: The nozzle seat 1, the nozzle seat 1 is a cylindrical shell, and the material is engineering plastic (nylon + 30% glass fiber reinforced); an inner ring flow channel 2 is opened in the middle of the nozzle seat 1, and an outer ring flow channel 3 is opened outside the inner ring flow channel 2 of the nozzle seat 1; a plurality of collecting flow channels 4 converging towards the center of the nozzle seat 1 are arranged at intervals inside the inner ring flow channel 2; a first threaded port 5 communicating with the collecting flow channel 4 is opened at the center of the top of the nozzle seat 1; a plurality of scattering flow channels 6 away from the center of the nozzle seat 1 are arranged at intervals on the outer ring flow channel 3; a plurality of second threaded ports communicating with the scattering flow channels 6 are radially opened outside the nozzle seat 1; The sprinkler head, the sprinkler head includes a Venturi acceleration tube 7 screwed to the first threaded port 5, and a scattering nozzle 8 screwed to the second threaded port; the coverage angle of the scattering nozzle 8 is 120°; a pressure jet nozzle is screwed to the top of the Venturi acceleration tube 7, and the pressure jet nozzle is a rotating nozzle 9 or a directional nozzle 10 fixed to the top of the Venturi acceleration tube 7; Dual-mode switching unit, the dual-mode switching unit includes an annular first elastic silica gel 11; a skirt 12 is integrally formed on the outside of the first elastic silica gel 11. The skirt 12 is made of silica gel (Shore hardness A50) and has an umbrella-like structure with a thickness gradient of 0.8 mm to 2 mm; during fatigue testing, after 5000 cycles of 0.1 - 0.5 MPa cyclic testing, the deformation attenuation of the skirt 12 is < 3% and there is no rupture; there is a gap between the initial state and the inlet of the outer ring flow channel 3. After deformation under high pressure, the inlet of the inner ring flow channel 2 is closed; a gland 13 is provided at the bottom of the first elastic silica gel 11, and the gland 13 is fixed to the nozzle seat 1 by bolts; a V-shaped through hole is opened at the center of the gland 13; a core seat 14 is movably fitted inside the V-shaped through hole; a core column 15 movably penetrates through the middle of the core seat 14. One end of the core column 15 is screwed to the center of the bottom surface of the nozzle seat 1, and the other end is screwed with a limit nut 16, and the limit nut 16 abuts against the bottom of the core seat 14; an elastic member is provided between the nozzle seat 1 and the core seat 14 on the core column 15; the Shore hardness of the first elastic silica gel 11 is A50; Liquid inlet pipe seat 17, the liquid inlet pipe seat 17 is fixed to the bottom of the nozzle seat 1 by a flange.

[0030] During operation, the liquid inlet pipe seat 17 injects pressurized water flow into the bottom of the nozzle seat 1. Then, the dual-mode switching unit operates. When the water pressure is lower than the deformation of the skirt 12, the water flow enters the flow channel formed by the skirt 12 and the inlet of the outer ring flow channel 3, and enters the scattering flow channel 6 through the outer ring flow channel 3. Then, it is atomized and sprayed through the scattering flow channel 6 and the scattering nozzle 8. The atomized water coverage angle is 120°. When the water pressure reaches the opening deformation pressure of the skirt 12, the water flow enters the flow channel formed by the skirt 12 and the inlet of the outer ring flow channel 3. At this time, the skirt 12 deforms and the flow channel shrinks. At the same time, the elastic member starts to deform, and the core seat 14 slides along the core column 15. The water flow enters the flow channel formed by the core seat 14 and the core column 15, the water flow enters the inner ring flow channel 2, and enters the first threaded port 5 through the collecting flow channel 4. After being pressurized by the Venturi acceleration tube 7, the high-pressure water is directionally sprayed at a high position or rotated and sprayed through the pressure jet nozzle, spraying from low to high or continuously expanding the spraying area; when the water pressure is continuously pressurized, the outer ring flow channel 3 is closed by the skirt 12. At this time, all the water flow enters the inner ring flow channel 2 and enters the Venturi acceleration tube 7. At this time, the pressure jet nozzle is in the fully open mode; it completes the spraying of the low-pressure mode of the spraying faucet, the switching spraying from the low-pressure mode to the high-pressure mode, and the spraying of the high-pressure mode; by adjusting the water pressure, it can automatically switch modes, can expand the spraying area and increase the spraying height, and can ensure uniform spraying within the spraying area.

[0031] It further includes a sealing base 18. A wedge-shaped sealing ring 19 is arranged between the nozzle base 1 and the liquid inlet pipe base 17. The skirt 12 is arranged opposite to the sealing ring 19. When the water pressure on the skirt 12 is <0.3 Mpa, a flow channel is arranged between the skirt 12 and the sealing ring 19; when the water pressure on the skirt 12 is ≥0.3 Mpa, the skirt 12 is deformed under pressure and pressed against the sealing ring 19 to close the outer ring flow channel 3. An annular plate 20 is integrally formed on the upper part inside the liquid inlet pipe base 17. A honeycomb filter screen 21 is pressed at the bottom of the annular plate 20; a flow guide cover 22 is pressed at the bottom of the honeycomb filter screen 21; the bottom of the flow guide cover 22 movably penetrates through the sealing base 18; and a metal braided pipe 23 which abuts against the bottom of the sealing base 18 is screwed. The sealing base 18 and the liquid inlet pipe base 17 are fixed by a flange; an inserted pipe which fits with the inner wall of the liquid inlet pipe base 17 and presses against the flow guide cover 22 is integrally formed on the top of the sealing base 18; the metal braided pipe 23 is connected to the pressure supply water pipe; the sealing ring 19 has a Shore hardness A70 and a compression ratio of 30±2%; During operation, the input end of the pressure supply water pipe is regulated by a pressure regulating valve, and the set water pressure enters the pressure supply water pipe and is distributed to each metal braided pipe 23. Then, the pressurized water flow enters the flow guide cover 22 through the metal braided pipe 23, and after being filtered by the honeycomb filter screen 21, the water flow enters the dual-mode switching unit. When the water flow pressure is lower than the deformation of the skirt 12 and the elastic deformation of the elastic member, the water flow enters the outer ring flow channel 3 from the flow channel formed between the sealing ring 19 and the skirt 12; when the water flow reaches the deformation water pressure of the skirt 12, the skirt 12 begins to deform, and at the same time the elastic member begins to deform synchronously, and the water flow enters the inner ring flow channel 2 from the flow channel between the V-shaped through hole and the core base 14, realizing the synchronous water inlet of the inner ring flow channel 2 and the outer ring flow channel 3. As the water flow pressure continues to rise, the flow channel formed between the sealing ring 19 and the skirt 12 gradually shrinks, and the inner ring flow channel 2 gradually increases until the outer ring flow channel 3 is completely closed and the inner ring flow channel 2 is fully opened; when the core base 14 acts, it slides linearly through the core column 15.

[0032] A plurality of support feet 24 are fixed to the bottom of the sealing base 18, and the support feet 24 are fixed to the garden ground; the sprinkling faucet can be fixed to the garden ground through the support feet 24.

[0033] The elastic member is a second elastic silica gel 27 or a spring body 28; through the elastic deformation of the second elastic silica gel 27 or the compression of the spring body 28, the deformation of the elastic member is realized, so that an inlet of the inner ring flow channel 2 is formed at the front end of the gland 13.

[0034] A limiting pipe seat 25 is integrally formed at the top of the gland 13. The inner wall of the limiting pipe seat 25 is flush with the inner edge of the inner ring flow channel 2. The first elastic silica gel 11 is movably fitted outside the limiting pipe seat 25. An annular notch for accommodating the first elastic silica gel 11 is formed by the gland 13, the limiting pipe seat 25 and the nozzle seat 1, so as to prevent the first elastic silica gel 11 from being pressed by the gland 13 and deformed when the first elastic silica gel 11 is fixed to the nozzle seat 1.

[0035] Both the converging flow channel 4 and the scattering flow channel 6 include straight guiding sections, and an inclined flow channel is integrally formed at the top of each straight guiding section. When the pressurized water enters the nozzle seat 1, the straight guiding sections of the converging flow channel 4 and the scattering flow channel 6 first inject the water flow, and the water flow is injected into the corresponding sprinkler heads through the inclined flow channels.

[0036] The pressure jet nozzle is fixed to the top of the Venturi accelerating pipe 7 by a flange or a thread, and the pressure jet nozzle and the Venturi accelerating pipe 7 can be assembled into one by a flange or a thread. The directional nozzle 10 includes a guiding pipe section inclined upward, and a pressure nozzle is fixed at the front end of the guiding pipe section. When the directional nozzle 10 is installed, the inclination angle of the guiding pipe section can be selected according to the height of the top of the tree, so that the high-pressure water can be sprayed directly above the tree.

[0037] An outer sleeve 26 is fitted outside the Venturi accelerating pipe 7, and the bottom of the outer sleeve 26 is fixed to the top of the nozzle seat 1 by a flange. The outer sleeve 26 can protect the Venturi accelerating pipe 7, which can not only prevent the installation position of the Venturi accelerating pipe 7 from fluctuating due to the impact of the internal fluid, but also prevent the Venturi accelerating pipe 7 from being deformed due to external impact.

[0038] The inlet diameter of the Venturi accelerating pipe 7 is 8±0.1 mm, which matches the front-end flow channel for a smooth transition. The cone angle of the contraction section is 15±0.5°, which can avoid flow separation and reduce the generation of turbulence. The throat length is 5±0.2 mm, which can stabilize the high-speed flow state and reduce vibration. The diameter is 3±0.05 mm, and the theoretical peak velocity of the flow is 12 m / s. The diffusion section length is 20±1 mm, which can ensure that the kinetic energy is fully converted into static pressure energy. The cone angle is 8±0.5°, and the pressure recovery rate is ≥85%, which can suppress cavitation.

[0039] The converging flow channel 4 has a diameter of 8 mm and is symmetrically distributed along the central axis of the nozzle seat 1, and its end is connected to the inlet of the Venturi accelerating pipe 7. The thickness gradient of the skirt 12 is from 0.8 mm to 2 mm, and its deformation amount is ≥1.5 mm under the water pressure of 0.3 MPa.

[0040] When the dual-mode switching unit is in the low-pressure stage of 0 - 0.1 Mpa, the water pressure is not sufficient to overcome the elastic resistance of the silica gel, and the skirt 12 remains undeformed. The water flows out through the scattering nozzle 8 with a coverage angle of 120°. The water flow guiding and scattering channel 6 has a wide coverage and a low range, and atomized water flow, which is suitable for lawns / shrubs. When the dual-mode switching unit is in the high-pressure stage of ≥0.3 Mpa, the skirt 12 deforms upward to block the inlet of the outer ring channel 3. The water flow is concentrated at the first threaded port 5 and pressurized through the Venturi acceleration tube 7 to achieve a narrow range and high range of water flow, which is suitable for large-area spraying and arbors. The water flow is concentrated and passes through the inner ring channel 2 and is ejected at high speed through the Venturi acceleration tube 7 with a range of ≥8 m. In the high-pressure mode, the flow rate fluctuation of 10 repeated tests is ≤2% (2.5 ± 0.05 L / s), and the flow rate consistency is good. When the water pressure of the dual-mode switching unit is greater than 0.1 Mpa and less than 0.3 Mpa, the flow rate ratio of the inner ring channel 2 and the outer ring channel 3 can be linearly adjusted from 0 to 100%; the dual-channel dynamic proportioning of water flow realizes continuous adjustment of spraying parameters; the mixed mode (water pressure greater than 0.1 Mpa and less than 0.3 Mpa) can be achieved by manually adjusting the inlet water pressure (such as rotating the external knob); uniform spraying within the working area is completed. The natural state diameter of the skirt 12 is 35 mm, and when it is under the water pressure of the high-pressure mode, it shrinks and fits the inner wall of the channel, and the diameter of the skirt 12 is 32 mm.

[0041] During use, according to the layout of the garden, determine the position of the arbor. First, fix the spraying faucet to the side of the arbor, and select a directional nozzle 10 suitable for its height, and rotate the directional nozzle 10 to the Venturi acceleration tube 7 to fix the directional nozzle 10 to the Venturi acceleration tube 7. Then, determine the distance between the spraying faucet and the arbor according to the crown width of the arbor, and then fix the spraying faucet to the garden ground; complete the fixation of the spraying faucet; then, rotate the rotating nozzle 9 to the Venturi acceleration tube 7 to fix the rotating nozzle 9 to the Venturi acceleration tube 7. Then, determine the distance between adjacent rotating nozzles 9 or the distance between adjacent rotating nozzles 9 and directional nozzles 10 according to the rotation radius of the rotating nozzle 9; fix the spraying faucet to the garden ground; complete the fixation of the spraying faucet; realize the atomizing spray, rotating spray and high-pressure spray of the spraying faucet, which can spray the spraying area in all directions and spray at a high position; during use, high water pressure spraying (0.35 Mpa) is adopted at night: the nozzle automatically switches to the high-pressure mode, and the vertical water flow has strong penetration, which can clean the leaves of tall arbors and expand the spraying coverage; low water pressure (0.08 Mpa) is adopted during the day: switch to the scattering mode, and use wide-area atomizing irrigation for the lower-layer shrubs. When the water pressure transitions from the low water pressure to the high water pressure state, the spraying area can be sprayed in all directions.

[0042] The above embodiments are only preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features, and principles described in the scope of the present invention application are included in the scope of the present invention application.

Claims

1. A dual-mode switching garden sprinkler faucet, characterized in that: Comprising: A nozzle base, in the middle of which an inner ring flow channel is provided, and an outer ring flow channel is provided outside the inner ring flow channel; a plurality of confluent channels converging towards the center of the nozzle base are arranged at intervals inside the inner ring flow channel; a first threaded port communicating with the confluent channels is provided at the center of the top of the nozzle base; a plurality of scattering channels away from the center of the nozzle base are arranged at intervals on the outer ring flow channel; a plurality of second threaded ports communicating with the scattering channels are radially provided outside the nozzle base; A spray head, which includes a Venturi acceleration tube screwed to the first threaded port and a scattering nozzle screwed to the second threaded port; the coverage angle of the scattering nozzle is 120°; a pressure jet nozzle is screwed to the top of the Venturi acceleration tube, and the pressure jet nozzle is a rotating nozzle or a directional nozzle fixed to the top of the Venturi acceleration tube; A dual-mode switching unit, which includes a ring-shaped first elastic silicone; a skirt is integrally formed on the outside of the first elastic silicone, and a gland is provided at the bottom of the first elastic silicone, and the gland is fixed to the nozzle base by bolts; a V-shaped through hole is provided at the center of the gland; a core seat is movably fitted inside the V-shaped through hole; a core column movably penetrates through the middle of the core seat, one end of the core column is screwed to the center of the bottom surface of the nozzle base, and the other end is screwed with a limit nut, and the limit nut abuts against the bottom of the core seat; an elastic member is provided between the nozzle base and the core seat; the Shore hardness of the first elastic silicone is A50; A liquid inlet pipe seat, which is fixed to the bottom of the nozzle base by a flange.

2. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: It further includes a sealing base, a wedge-shaped sealing ring is provided between the nozzle base and the liquid inlet pipe seat, and the skirt is arranged opposite to the sealing ring. When the water pressure on the skirt is <0.3 Mpa, a flow channel is provided between the skirt and the sealing ring; when the water pressure on the skirt is ≥0.3 Mpa, the skirt is compressed and deformed to press-fit with the sealing ring to close the outer ring flow channel; an annular plate is integrally formed on the upper part inside the liquid inlet pipe seat, and a honeycomb filter is pressed on the bottom of the annular plate; a flow guide cover is pressed on the bottom of the honeycomb filter; the bottom of the flow guide cover movably penetrates through the sealing base; and a metal braided pipe screwed and tightened against the bottom of the sealing base is provided; the sealing base and the liquid inlet pipe seat are fixed by a flange; an embedded pipe that fits with the inner wall of the liquid inlet pipe seat and presses against the flow guide cover is integrally formed on the top of the sealing base; the metal braided pipe is connected to a water supply pressure pipe; the sealing ring, Shore hardness A70, compression ratio 30±2%.

3. The dual-mode switching garden sprinkler faucet according to claim 2, wherein: A plurality of support feet are fixed to the bottom of the sealing base, and the support feet are fixed to the garden ground.

4. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: The elastic member is a second elastic silicone or a spring body.

5. The dual-mode switching garden sprinkler faucet according to claim 1, wherein: A limit pipe seat is integrally formed on the top of the gland, the inner wall of the limit pipe seat is flush with the inner edge of the inner ring flow channel, and the first elastic silicone is movably fitted with the outside of the limit pipe seat.

6. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: Both the confluent channels and the scattering channels include a straight guiding section, and an inclined channel is integrally formed on the top of the straight guiding section.

7. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: The pressure jet nozzle is fixed to the top of the Venturi acceleration tube by a flange or a thread, and the directional nozzle includes an inclined upward guiding tube section, and a pressure nozzle is fixed at the front end of the guiding tube section.

8. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: The Venturi acceleration tube is externally fitted with a jacket body, and the bottom of the jacket body is fixed to the top of the nozzle seat through a flange.

9. The dual-mode switching garden sprinkler faucet according to claim 1, wherein: The inlet diameter of the Venturi acceleration tube is 8 ± 0.1 mm, the cone angle of the contraction section is 15 ± 0.5°, the throat length is 5 ± 0.2 mm, the diameter is 3 ± 0.05 mm, the diffusion section length is 20 ± 1 mm, and the cone angle is 8 ± 0.5°.

10. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: The diameter of the flow collecting channel is 8 mm, which is symmetrically distributed along the central axis of the nozzle seat, and the end is connected to the inlet of the Venturi acceleration tube; the thickness gradient of the skirt is 0.8 mm to 2 mm, and its deformation amount is ≥ 1.5 mm under the water pressure of 0.3 MPa.

11. The dual-mode switching garden sprinkler faucet according to claim 1, characterized in that: When the dual-mode switching unit is in the low-pressure stage of 0 - 0.1 Mpa, the water pressure is not enough to overcome the elastic resistance of the silica gel, the skirt remains undeformed, and the water flow is ejected through the scattering nozzle with a coverage angle of 120°; when the dual-mode switching unit is in the high-pressure stage of ≥ 0.3 MPa, the skirt deforms upward to close the inlet of the outer ring flow channel; the water flow is concentrated through the inner ring flow channel and is ejected at a high speed through the Venturi acceleration tube with a range of ≥ 8 m; when the water pressure of the dual-mode switching unit is greater than 0.1 Mpa and less than 0.3 Mpa, the flow rate ratio of the inner ring flow channel and the outer ring flow channel can be linearly adjusted from 0 to 100%.

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