Double-channel variable pressure spray header for maintaining vegetation on high and steep slope

Abstract

The utility model relates to the technical field of ecological restoration, in particular to a double-channel variable-pressure spray header for high and steep slope vegetation maintenance, which comprises a water supply pipe, a first end of the water supply pipe is connected with a water supply pipe, and a second end of the water supply pipe extends upwards; the water distribution pipeline is connected to the second end of the water feeding pipe, the water distribution pipeline comprises a connecting part and a water distribution part, and the connecting part is connected to the second end of the water feeding pipe. According to the spray head, the two channels are formed in the spray head, the pressures of the two channels are different through the variable-diameter design, the spray head component is provided with the first spray head array facing the downslope direction and the second spray head array facing the reverse slope direction, and the action of gravity can be resisted by applying high pressure to the spray heads in the downslope direction; water flow sprayed by the spray head does not deviate from the axis as far as possible, the spraying coverage range in the downhill direction is more controllable, the spray head has a more uniform coverage range without a blind area on the whole, and uniform growth of plants is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to ecological restoration technical field, and specifically relates to high and steep slope vegetation maintenance with double pass variable pressure shower head. BACKGROUND

[0002] In the process of the increasing number of open-pit mines, the number of high and steep rock slopes formed is also increasing. The existence of a large number of abandoned mines or left mines not only has the problem of difficult recovery of vegetation, but also has an impact on the beautification of the local city image, and increases the frequency of geological disasters, so it is necessary to carry out ecological restoration on these high and steep rock slopes.

[0003] Ecological restoration of high and steep rock slopes of mines is a complex and challenging work, and currently artificial auxiliary restoration is usually used, such as using chiseling (groove) to plant green, that is, planting holes, which is beneficial to fixing the soil and water in the hole.

[0004] In order to ensure the normal production of plants, through reasonable irrigation, fertilization and other maintenance measures, sufficient water and nutrients are provided for plants to meet the needs of plant growth and development, and promote the healthy growth of plants, but the difficulty of using a shower head to supply water to the vegetation is that when the shower head irrigates and sprays in a 360-degree rotary spraying mode, the high and steep slope will cause the spraying coverage range in the downhill direction and the uphill direction of the shower head to be uneven, for example Figure 1 As shown, the spraying range A formed in the downhill direction is far away from the shower head under the action of gravity, and even directly falls to the bottom of the slope, and cannot effectively irrigate and cover part of the planting hole, so the coverage rate of the planting hole is low, especially the restored green plants located at the bottom of the high and steep slope have a low survival rate. UTILITY MODEL CONTENTS

[0005] In view of the technical problems existing in the slope vegetation maintenance in the prior art, the utility model provides a double pass variable pressure shower head for high and steep slope vegetation maintenance, comprising:

[0006] The upper water pipe is connected to the water supply pipe at the first end and extends upward at the second end;

[0007] The water distribution pipeline is connected to the second end of the upper water pipe, and the water distribution pipeline comprises a connecting part and a water distribution part, the connecting part is connected to the second end of the upper water pipe, the water distribution part is inside the upper water pipe, and the space in the upper water pipe is divided into a first flow channel and a second flow channel, the connecting part is provided with a first water supply pipe in communication with the first flow channel and a second water supply pipe in communication with the second flow channel;

[0008] A spray head assembly is connected to the outlet of the water distribution pipe, the spray head assembly comprises a first spray head array and a second spray head array, the first spray head array is connected to the first water supply pipe, and the second spray head array is connected to the second water supply pipe.

[0009] The water pressure in the first flow channel is greater than that in the second flow channel, the first spray head array is directed towards the slope direction of the slope, and the second spray head array is directed towards the reverse slope direction of the slope.

[0010] Preferably, the water distribution part is configured as a variable-diameter pipe, the axis of the variable-diameter pipe coincides with the axis of the upper water pipe, and the variable-diameter pipe is provided with a region with a diameter gradually decreasing along the water flow direction.

[0011] Preferably, the variable-diameter pipe comprises a first diameter section and a diameter gradually decreasing section arranged downstream of the first diameter section, and the first water supply pipe is arranged downstream of the diameter gradually decreasing section, wherein the inside of the inlet of the first diameter section forms the first flow channel, and the outside of the inlet of the first diameter section forms the second flow channel.

[0012] Preferably, the inner wall of the first diameter section, the diameter gradually decreasing section, and the first water supply pipe is provided with a spiral guide rib.

[0013] Preferably, the upper water pipe comprises an inlet section, a reduced-diameter section, and an upper water section, the diameter of the inlet section is greater than that of the upper water section, the connecting part is arranged to be axially movable relative to the upper water section, and the inlet of the first diameter section is axially movable within the reduced-diameter section to change the cross-sectional size of the second flow channel inlet.

[0014] Preferably, the inner wall of the upper water section is provided with a support rib which is in contact with the outer wall of the first diameter section.

[0015] Preferably, the spray head assembly is assembled to the outlet of the water distribution pipe along the axis direction of the upper water pipe, the outer side of the spray head assembly is provided with a gland, and the gland is connected to the water distribution pipe to axially fix the spray head assembly and the water distribution pipe.

[0016] Preferably, the spray head assembly comprises a first water supply cavity in communication with the first water supply pipe and a second water supply cavity in communication with the second water supply pipe, the first spray head array is connected to the first water supply cavity, and the second spray head array is connected to the second water supply cavity.

[0017] Preferably, the first spray head array comprises three rows of first spray heads arranged along the axis direction of the upper water pipe.

[0018] The first row of first spray heads is located at the lowermost position, and the first spray heads in the first row form an angle of 25-30° with the axis direction of the upper water pipe.

[0019] The second row of first nozzles is located in the middle, and the first nozzles in the second row are arranged at an angle of 45-55° with the direction of the upper pipe axis;

[0020] The third row of first nozzles is located at the uppermost position, and the first nozzles in the third row are arranged at an angle of 70-80° with the direction of the upper pipe axis.

[0021] Preferably, the second nozzle array comprises two rows of second nozzles arranged along the direction of the upper pipe axis;

[0022] The first row of second nozzles is located at the lower position, and the second nozzles in the first row are arranged at an angle of 80-90° with the direction of the upper pipe axis;

[0023] The second row of second nozzles is located at the upper position, and the second nozzles in the second row are arranged at an angle of 100-110° with the direction of the upper pipe axis.

[0024] Compared with the prior art, the utility model has the advantages that:

[0025] The nozzle of the application is provided with two channels in the interior, and the pressure of the two channels is different through the variable-diameter design, the nozzle part is provided with a first nozzle array in the direction of the slope and a second nozzle array in the direction opposite to the slope, high pressure is applied to the nozzle in the direction of the slope, the effect of gravity is resisted, the water flow sprayed by the nozzle deviates from the axis as little as possible, the spraying coverage in the direction of the slope is more controllable, the water flow in the direction opposite to the slope forms a spraying coverage area from near to far, and the arrayed planting holes can be targetedly covered and irrigated with high coverage, which is beneficial to the uniform growth of plants and reduces the waste of water resources. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical, or nearly identical, component that is illustrated in various figures is represented with a like numeral. For purposes of clarity, not every component is called out in every drawing. There is now being described by way of example various embodiments of aspects of the application with reference to the attached drawings, in which:

[0027] Figure 1 is a schematic view of a prior art sprinkler in a high and steep slope water spraying state;

[0028] Figure 2 is a schematic view of a high and steep slope vegetation maintenance double-channel variable pressure sprinkler in a high and steep slope water spraying state according to the utility model;

[0029] Figure 3 is a schematic view of the structure of a high and steep slope vegetation maintenance double-channel variable pressure sprinkler according to the utility model;

[0030] Figure 4It is the cross section structure schematic view of the double-channel variable pressure spray head for high and steep slope vegetation maintenance shown in the utility model.

[0031] Figure 5 It is the schematic view of relative position change of distribution pipe and water inlet pipe shown in the utility model.

[0032] Figure 6 It is the structure schematic view of the first flow channel and the second flow channel shown in the utility model.

[0033] Figure 7 It is the distribution schematic view of the spiral guide rib shown in the utility model.

[0034] Figure 8 It is the distribution schematic view of the water supply pipe on the slope shown in the utility model. DETAILED DESCRIPTION

[0035] In order to understand the technical content of the utility model more, specific embodiments are raised and the following is described with the attached drawings.

[0036] Combining Figure 2 and Figure 3 shown, the utility model provides a double-channel variable pressure spray head for high and steep slope vegetation maintenance, including water inlet pipe 10, distribution pipe 20 and spray head component 40.

[0037] As Figure 2 shown, the slope 100 and horizontal plane present 70~80 ° angle, and multiple planting holes 110 are arranged on the surface of the slope 100, and the multiple planting holes 110 are distributed in matrix or plum blossom shape, and each planting hole 110 is equipped with biological vegetation bag, and the water supply pipe 200 is laid on the surface of the slope 100.

[0038] Optionally, the water supply pipe 200 extends downwards along the slope between the gaps of two rows of planting holes 110, and the water supply pipe 200 is supplied with water by the water storage tank at the top of the slope 100.

[0039] Among them, multiple three-way valves are connected on the water supply pipe 200, and multiple water inlet pipes 10 on the slope are connected to the three-way valves respectively, and the output end of the three-way valve is equipped with a pressure stabilizing valve, controls the water pressure flowing into the water inlet pipe 10, makes the water pressure in each water inlet pipe 10 consistent, is favorable to keep the uniformity of the whole slope spraying.

[0040] Optionally, the water supply pipe 200 can be connected with horizontally arranged short pipes, so that the water inlet pipe 10 is located between the upper and lower planting holes 110.

[0041] Further, the water distribution pipe 20 is connected to the second end of the water supply pipe 10, the water distribution pipe 20 comprises a connecting portion 21 and a water distribution portion 22, the connecting portion 21 is connected to the second end of the water supply pipe 10, the water distribution portion 22 is inside the water supply pipe 10 and divides the space inside the water supply pipe 10 into a first flow channel and a second flow channel, the connecting portion 21 is provided with a first water supply pipe 223 in communication with the first flow channel and a second water supply pipe 211 in communication with the second flow channel.

[0042] Wherein, the water pressure in the first flow channel is greater than the water pressure in the second flow channel.

[0043] In this way, the water flow inside the water supply pipe 10 is divided into two paths by the water distribution portion 22 in the water distribution pipe 10, i.e. the water flow in the first flow channel and the second flow channel, by setting the water pressure in the first flow channel to be greater than the water pressure in the second flow channel, different water pressures can be provided for the nozzles in the downslope direction and the nozzles in the upslope direction, which is beneficial to keeping the spray ranges of the nozzles in different directions relatively uniform.

[0044] Further, the nozzle assembly 40 is connected to the outlet of the water distribution pipe 20, the nozzle assembly 40 comprises a first nozzle array 43 and a second nozzle array 44, the first nozzle array 43 is connected to the first water supply pipe 223, and the second nozzle array 44 is connected to the second water supply pipe 211.

[0045] Wherein, the first nozzle array 43 is directed towards the downslope direction of the slope, and the second nozzle array 44 is directed towards the upslope direction of the slope.

[0046] In this way, the first nozzle array 43 directed towards the downslope direction has a greater water pressure, so that the first nozzle array 43 can resist the action of gravity and spray to a region closer to the water distribution pipe 10, avoiding the blind area caused by gravity throwing to a farther region (e.g. directly floating to the bottom of the slope), and the second nozzle array 44 is set at a reasonable angle, and can cover a region closer to the water distribution pipe 10 through the parabolic trajectory of the spray, as described above, by providing different water pressures for the first nozzle array 43 in the downslope direction and the second nozzle array 44 in the upslope direction, a relatively uniform spray coverage range is formed around the water distribution pipe 10, the effective coverage area of the spray is larger, and the spray coverage blind area is avoided.

[0047] In combination Figure 4 As shown, the water distribution portion 22 is configured as a variable-diameter pipe, the axis of the variable-diameter pipe coincides with the axis of the water supply pipe 10, and the variable-diameter pipe is provided with a region with a diameter gradually decreasing along the water flow direction.

[0048] Specifically, the variable-diameter pipeline comprises a first diameter section 221 and a diameter-tapered section 222, the diameter-tapered section 222 is arranged downstream of the first diameter section 221, and a first water supply pipe 223 is arranged downstream of the diameter-tapered section 222, wherein an inner side of an inlet of the first diameter section 221 forms a first flow channel, and an outer side of the inlet of the first diameter section 221 forms a second flow channel.

[0049] In this way, after the water flow enters the diameter-tapered section 222 from the inner side of the first diameter section 221, the cross-sectional size is reduced, the water flow is forced to compress, the pressure energy is converted into kinetic energy by Bernoulli effect, and the water flow velocity is increased, and after the water flow enters the water distribution pipeline 10 from the outer side of the first diameter section 221, the cross-sectional size is increased, the water flow is dispersed, and thus the water flow velocity is reduced, so that high flow velocity and large pressure are formed in the first flow channel, and low flow velocity and small pressure are formed in the second flow channel.

[0050] In the preferred embodiment, the inner walls of the first diameter section 221, the diameter-tapered section 222, and the first water supply pipe 223 are provided with spiral guide ribs 25.

[0051] In this way, the water flow entering the first diameter section 221 is forced to rotate by the guide ribs 25, the rotating water flow enhances the jet condensation, and the water pressure loss caused by atomization is reduced.

[0052] In combination with FIGS. 1-3, Figure 5 and Figure 6 As shown in FIGS. 1-3, the upper water pipe 10 comprises an inlet section 11, a diameter-reducing section 12, and an upper water section 13, the diameter of the inlet section 11 is greater than the diameter of the upper water section 13, and a connecting part 21 is arranged to be axially movable relative to the upper water section 13, so that the inlet of the first diameter section 221 can be axially moved in the diameter-reducing section 12 to change the cross-sectional size of the second flow channel inlet 102.

[0053] In this way, when the connecting part 21 moves downward or upward, the position of the bottom of the first diameter section 221, i.e., the inlet, in the diameter-reducing section 12 is different, when the bottom of the first diameter section 221 is closer to the upper part of the diameter-reducing section 12, the water flow entering the first flow channel inlet 201 is more, and when the bottom of the first diameter section 221 is closer to the lower part of the diameter-reducing section 12, the water flow entering the second flow channel inlet 102 is more, and by adjusting the position of the connecting part 21, the pressure relationship between the first flow channel and the second flow channel can be changed.

[0054] In the alternative embodiment, the connecting part 21 is arranged as a cap structure with internal threads, the outer wall of the upper water section 13 is provided with external threads, and the connecting part 21 can be connected to the upper end of the upper water section 13 by threaded connection, and by controlling the number of turns of the connecting part 21, the relative axial spacing between the bottom of the first diameter section 221 and the diameter-reducing section 12 can be changed.

[0055] Furthermore, the inner wall of the water supply section 13 is provided with a support rib 14, which is attached to but not fixed to the outer wall of the first diameter section 221.

[0056] In this way, the support rib 14 provides support and positioning for the first diameter segment 221, preventing the first diameter segment 221 from swaying off the axis.

[0057] Furthermore, the nozzle component 40 is assembled to the outlet of the water distribution pipe 20 along the axial direction of the water supply pipe 10. A pressure cap 30 is provided on the outside of the nozzle component 40, and the pressure cap 30 is connected to the water distribution pipe 20 to fix the nozzle component 40 and the water distribution pipe 20 axially.

[0058] The nozzle component 40 has an outwardly extending first step 45 on its outer side, and the inner wall of the pressure cap 30 has an inwardly extending second step 31. When the pressure cap 30 is placed over the nozzle component 40, the second step 31 can press down on the first step 45.

[0059] Specifically, the outer wall of the connecting part 21 is also threaded, and the inner wall of the pressure cap 30 is threaded. The pressure cap 30 can be fixed to the outside of the connecting part 21 by means of threaded connection, and press the nozzle component 40 to fix it axially.

[0060] In an optional embodiment, the nozzle component 40 includes a first water supply chamber 41 communicating with the first water supply pipe 223 and a second water supply chamber 42 communicating with the second water supply pipe 211. The first nozzle array 43 is connected to the first water supply chamber 41, and the second nozzle array 44 is connected to the second water supply chamber 42.

[0061] Combination Figure 6 As shown, the inlet section 11 of the water supply pipe 10 forms the water inlet area 101. When the water reaches the first diameter section 221 of the water distribution section 22 along the water flow direction, a diversion occurs. The first path is the first flow channel inlet 201 - the diameter reduction and pressurization area 202 - the first flow channel outlet 203, and the second path is the second flow channel inlet 102 - the diameter expansion and pressure reduction area 103 - the second flow channel outlet.

[0062] Combination Figures 2 to 4 As shown, the height of the first water supply chamber 41 is higher than that of the second water supply chamber 42. The first water supply chamber 41 is constructed in a columnar shape, and nozzles can be installed on the side facing downhill and on both the left and right sides. The second water supply chamber 42 is constructed in a fan shape, and nozzles can be installed on the side facing uphill.

[0063] like Figure 8 As shown, nozzles are respectively installed on the surfaces of the first water supply chamber 41 and the second water supply chamber 42 in the direction of the planting hole to achieve high coverage of the planting hole.

[0064] In an optional embodiment, the first nozzle array 43 comprises three rows of first nozzles arranged along the axis direction of the upper water pipe 10, and the arrangement of the first nozzles in the circumferential direction is set according to the distribution characteristics of the planting holes, especially towards the direction of the planting holes. In this way, through the multi-level arrangement of the first nozzles, a more uniform spraying range can be formed, especially for the array or plum blossom distribution of the planting holes.

[0065] Specifically, the first row of first nozzles is located at the lowermost position, and the first nozzles in the first row form an angle of 25-30° with the axis direction of the upper water pipe 10; the second row of first nozzles is located in the middle, and the first nozzles in the second row form an angle of 45-55° with the axis direction of the upper water pipe 10; the third row of first nozzles is located at the uppermost position, and the first nozzles in the third row form an angle of 70-80° with the axis direction of the upper water pipe 10.

[0066] In this way, through the arrangement of the three layers of first nozzles, the coverage gradually covers from the proximal side to the distal side of the upper water pipe 10, and since the first nozzles can form a water flow with large pressure and fast flow rate, the disturbance of gravity to the water flow in the direction away from the upper water pipe 10 can be reduced, so that the water flow sprayed by the first nozzles can deviate as little as possible from the axis direction of the first nozzles to form an ideal spraying coverage area, that is, to improve the spraying coverage rate of the target planting hole, for example Figure 2 the spraying range A.

[0067] In an optional embodiment, the second nozzle array 44 comprises two rows of second nozzles arranged along the axis direction of the upper water pipe 10, so that through the arrangement of the upper and lower two layers of second nozzles staggered, the uniformity of the spraying coverage in the reverse slope direction is improved.

[0068] Specifically, the first row of second nozzles is located at the lower position, and the second nozzles in the first row form an angle of 80-90° with the axis direction of the upper water pipe 10; the second row of second nozzles is located at the upper position, and the second nozzles in the second row form an angle of 100-110° with the axis direction of the upper water pipe 10. The first nozzles and the second nozzles can be selected as fan-shaped nozzles to increase the lateral coverage range.

[0069] In this way, through the arrangement of the two layers of second nozzles, and the upward arrangement of the upper layer of second nozzles, the first layer of second nozzles can realize closer spraying, and the second layer of upward second nozzles can realize farther spraying, realizing a spraying coverage range from near to far, which is conducive to realizing targeted spraying coverage according to the array or plum blossom distribution of the planting holes.

[0070] In combination with the above embodiments, the spray head of the application is provided with two channels inside, and the pressure of the two channels is different through the variable diameter design, the spray head component is provided with a first spray head array in the down-slope direction and a second spray head array in the up-slope direction, high pressure is applied to the spray head in the down-slope direction, the action of gravity can be resisted, the water flow sprayed by the spray head can not deviate from the axis as much as possible, the spraying coverage in the down-slope direction is more controllable, the water flow in the up-slope direction forms a spraying coverage area from near to far, and the arrayed planting holes can be targeted to achieve high coverage spraying irrigation, that is, it is beneficial to keep the plants grow uniformly, and the waste of water resources is reduced.

[0071] Although the utility model has disclosed as above with preferable embodiments, it is not used to limit the utility model. Those skilled in the art to which the utility model belongs can make various changes and decorations without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be defined by the claims.

Claims

1. A double-channel variable pressure spray head for vegetation maintenance of high and steep slopes, characterized by, The utility model relates to a water supply device for slope surface, comprising: an upper water pipe (10) having a first end connected to a water supply pipe (200) and a second end extending upwardly; a water distribution pipe (20) connected to the second end of the upper water pipe (10), the water distribution pipe (20) comprising a connecting portion (21) connected to the second end of the upper water pipe (10) and a water distribution portion (22) inside the upper water pipe (10) and dividing a space inside the upper water pipe (10) into a first flow channel and a second flow channel, the connecting portion (21) being provided with a first water supply pipe (223) communicating with the first flow channel and a second water supply pipe (211) communicating with the second flow channel; a spray head assembly (40) connected to an outlet of the water distribution pipe (20), the spray head assembly (40) comprising a first spray head array (43) connected to the first water supply pipe (223) and a second spray head array (44) connected to the second water supply pipe (211); wherein a water pressure in the first flow channel is greater than a water pressure in the second flow channel, the first spray head array (43) is directed toward a down-slope direction of the slope, and the second spray head array (44) is directed toward an up-slope direction of the slope.

2. The double-channel variable pressure spray head for vegetation maintenance of high and steep slope according to claim 1, characterized in that, The water distribution portion (22) is configured as a variable-diameter pipe, an axis of the variable-diameter pipe coincides with an axis of the upper water pipe (10), and the variable-diameter pipe is provided with a region of gradually decreasing diameter along a water flow direction.

3. The double-channel variable pressure spray head for vegetation maintenance of high and steep slope according to claim 2, characterized in that, The variable-diameter pipe comprises a first diameter section (221) and a diameter gradually decreasing section (222) provided downstream of the first diameter section (221), and the first water supply pipe (223) is provided downstream of the diameter gradually decreasing section (222), wherein an inner side of an inlet of the first diameter section (221) forms the first flow channel, and an outer side of the inlet of the first diameter section (221) forms the second flow channel.

4. The double-channel variable pressure spray head for vegetation maintenance of high and steep slope according to claim 3, characterized in that, Inner walls of the first diameter section (221), the diameter gradually decreasing section (222), and the first water supply pipe (223) are provided with helical guide ribs (25).

5. The double-channel variable pressure spray head for vegetation maintenance of high and steep slope according to claim 3, characterized in that, The upper water pipe (10) comprises an inlet section (11), a reduced-diameter section (12), and an upper water section (13), a diameter of the inlet section (11) is greater than a diameter of the upper water section (13), the connecting portion (21) is provided to be axially movable relative to the upper water section (13), and an inlet of the first diameter section (221) is axially movable inside the reduced-diameter section (12) to change a cross-sectional size of a second flow channel inlet (102).

6. The double-channel variable pressure spray head for vegetation maintenance of high and steep slope according to claim 5, characterized in that, An inner wall of the upper water section (13) is provided with a support rib (14) abutting an outer wall of the first diameter section (221).

7. The double pass variable pressure spray head for high steep slope vegetation maintenance of claim 1, wherein, The spray head assembly (40) is assembled to the outlet of the water distribution pipe (20) along an axis direction of the upper water pipe (10), an outer side of the spray head assembly (40) is provided with a gland (30) connected to the water distribution pipe (20) to axially fix the spray head assembly (40) and the water distribution pipe (20).

8. The double pass variable pressure spray head for high steep slope vegetation maintenance of claim 1, wherein, The spray head component (40) comprises a first water supply cavity (41) in communication with the first water supply pipe (223) and a second water supply cavity (42) in communication with the second water supply pipe (211), the first spray head array (43) is connected to the first water supply cavity (41), and the second spray head array (44) is connected to the second water supply cavity (42).

9. The double pass variable pressure spray head for high steep slope vegetation maintenance of claim 1, wherein, The first spray head array (43) comprises three rows of first spray heads arranged along the axis direction of the water supply pipe (10); The first row of first spray heads is located at the lowermost position, and the first spray heads in the first row are arranged at an angle of 25-30° with the axis direction of the water supply pipe (10); The second row of first spray heads is located at the middle position, and the first spray heads in the second row are arranged at an angle of 45-55° with the axis direction of the water supply pipe (10); The third row of first spray heads is located at the uppermost position, and the first spray heads in the third row are arranged at an angle of 70-80° with the axis direction of the water supply pipe (10).

10. The double pass variable pressure spray head for high steep slope vegetation maintenance of claim 1, wherein, The second spray head array (44) comprises two rows of second spray heads arranged along the axis direction of the water supply pipe (10); The first row of second spray heads is located at the lower position, and the second spray heads in the first row are arranged at an angle of 80-90° with the axis direction of the water supply pipe (10); The second row of second spray heads is located at the upper position, and the second spray heads in the second row are arranged at an angle of 100-110° with the axis direction of the water supply pipe (10).

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