Anti-blocking water dropper and drip irrigation pipe

Abstract

The utility model discloses an anti-blocking water dropper and a drip irrigation pipe. The anti-blocking water dropper comprises a water dropper body, a water inlet hole is formed in the water dropper body, and the water inlet hole penetrates through the water dropper body; a turbulent flow groove and a water outlet groove are formed in the first surface of the water dropper body; a plurality of alternately-arranged water retaining ribs are arranged on the two sides in the turbulent flow groove in the water flowing direction, and sunken parts are arranged on the incident flow faces of the water retaining ribs and configured to guide flowing water to form vortexes; a water inlet groove is formed in the second surface of the water dropper body; two first ribs which are arranged side by side are arranged in the water inlet groove, a plurality of flow guide plates which are arranged side by side are arranged in the water inlet hole, the flow guide plates are obliquely arranged relative to the first ribs, and water guide ribs are further arranged on the two sides, extending out of the water inlet hole and extending to the end of the water inlet groove, of the flow guide plates. The anti-blocking performance of the anti-blocking water dropper is improved, so that the use reliability of the drip irrigation pipe is improved.

Description

Technical Field

[0001] The present application relates to the field of irrigation technology, and in particular to an anti-blocking dripper and a drip irrigation pipe. Background Art

[0002] Drip irrigation is a precision irrigation method that drips water evenly and slowly into the soil near the crop root zone through emitters such as drippers or orifices installed on drip irrigation pipes. This minimizes water leakage and loss, ensuring timely supply of water to the crop root zone and maintaining the appropriate humidity in the soil near the crop root system. This facilitates the activity of water, fertilizer, air, heat, and microorganisms in the soil, keeping it in good condition and creating favorable conditions for high and stable crop yields. Double-perforated drippers are widely used because a single dripper can produce a large amount of water. Chinese Patent Publication No. CN 205694737 U discloses a micro, anti-clogging, single-hole, inner-inserted dripper and drip irrigation tape. A maze of turbulent grooves is formed on the front of the dripper around the water inlet to meet the dripping requirements of the dripper.

[0003] However, in actual use, there will be impurities in the water flowing in the drip irrigation pipe. Large impurities in the water (large particles of sand or grass leaves) will block the water inlet hole in the drip irrigation pipe, while smaller impurities in the water (silt) will gather in the maze turbulent groove and cause internal blockage, which will make the dripper easily fail and reduce the reliability of the drip irrigation pipe.

[0004] In view of this, how to design a technology that improves the anti-blocking performance to improve the reliability of the drip irrigation pipe is the technical problem to be solved by this application. Summary of the Invention

[0005] The present application provides an anti-blocking dripper and a drip irrigation pipe, which improve the anti-blocking performance of the anti-blocking dripper and thus improve the reliability of the drip irrigation pipe.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] The present application provides an anti-clogging dripper, comprising a dripper body, wherein the dripper body is provided with a water inlet hole, and the water inlet hole passes through the dripper body;

[0008] A turbulence groove and a water outlet groove are provided on the first surface of the dripper body, wherein the turbulence grooves are distributed around the outer side of the water inlet hole, one end of the turbulence groove is connected to the water inlet hole, and the leading end of the turbulence groove is connected to the water outlet groove; a plurality of alternately arranged water retaining ribs are provided on both sides of the turbulence groove along the flow direction of the water flow, and a concave portion is provided on the upstream surface of the water retaining rib, wherein the concave portion is configured to guide the flowing water to form a vortex;

[0009] A water inlet groove is provided on the second surface of the dripper body; two first ribs arranged side by side are provided in the water inlet groove, and the water inlet hole is located between the two first ribs; a plurality of guide plates arranged side by side are provided in the water inlet hole, and the guide plates are arranged obliquely relative to the first ribs. Water guide ribs are further provided on both sides of the guide plates extending from the water inlet hole to the end of the water inlet groove, and the water guide ribs are connected to the first ribs on the corresponding sides;

[0010] Two adjacent guide plates form a first water inlet area in the water inlet groove, and a second water inlet area is formed between the side portions of two adjacent water guide ribs on the same first rib.

[0011] Furthermore, the recessed portion is also configured to guide the flowing water to flow toward the water retaining ribs arranged adjacent to each other and staggered upstream of the water flow.

[0012] Furthermore, the water retaining ribs as a whole extend obliquely away from the flow direction of the water in the turbulent flow groove;

[0013] The end of the flow-facing surface of the water retaining rib is further provided with a guide surface, and the guide surface extends obliquely along the water flow direction in the turbulent flow groove;

[0014] The guide surface is configured to guide the water flowing through it to flow toward the water retaining ribs arranged adjacent to each other and staggered downstream.

[0015] Furthermore, the recessed portion is arranged at the root of the water retaining rib;

[0016] The back-flow surface of the water retaining rib forms a water retaining surface; the water retaining surface extends obliquely away from the flow direction of the water in the turbulent flow groove;

[0017] The water retaining surface is configured to guide water to flow toward the water retaining ribs arranged adjacent to each other and staggered upstream of the water flow.

[0018] Furthermore, a second rib is provided in the water inlet groove, and the second rib is arranged on the side of the first rib. The second rib extends along the extension direction of the first rib, and the second rib is provided with spaced protrusions, forming a water flow gap between two adjacent protrusions.

[0019] Furthermore, the water guide rib extends in a direction perpendicular to the first rib, and the protrusion is arranged opposite to the second water inlet area at a corresponding position.

[0020] Furthermore, the height of the second rib is greater than the height of the first rib;

[0021] A first buffer groove is formed between the second rib and the adjacent first rib, and a second buffer groove is formed between the second rib and the inner groove wall of the water inlet groove.

[0022] Furthermore, the bottom surface of the second buffer groove extends obliquely from the outside to the inside toward the water inlet hole.

[0023] Furthermore, the end of the guide plate away from the water inlet groove has a smooth structure.

[0024] The present application also provides a drip irrigation pipe, comprising a pipe body and the above-mentioned anti-blocking dripper, wherein the anti-blocking dripper is arranged on the inner wall of the pipe body, a water inlet cavity is formed between the water inlet hole of the anti-blocking dripper and the inner wall of the pipe body, a turbulent flow channel is formed between the turbulent flow groove of the anti-blocking dripper and the inner wall of the pipe body, and a water outlet cavity is formed between the water outlet groove of the anti-blocking dripper and the inner wall of the pipe body;

[0025] The tube body is provided with a plurality of water outlet holes, and the water outlet holes are communicated with the corresponding cavities.

[0026] The present application also provides a water-saving irrigation system, comprising a main water supply pipe and a plurality of drip irrigation pipes, wherein the plurality of drip irrigation pipes are respectively connected to the main water supply pipe, and the drip irrigation pipes adopt the above-mentioned drip irrigation pipes.

[0027] The technical solution of the present application has the following technical effects compared with the existing technology: by arranging a recessed portion on the water retaining rib of the turbulent groove, the recessed portion is formed on the frontal surface of each water retaining rib, and when the water flows in the turbulent groove, after the water flows into the recessed portion, the concave structure of the recessed portion will cause the water to swirl at this position to form a vortex, and under the action of the vortex, it can prevent sediment from gathering on the frontal surface of the water retaining rib that blocks the flow of water, and the sediment will be carried away by the vortex formed by the recessed portion and finally enter the water outlet groove for output, so that the occurrence of excessive sediment accumulation in the turbulent groove can be reduced. Blockage occurs; at the same time, for the water inlet groove of the dripper body, when the water in the drip irrigation pipe passes through the water inlet groove and flows into the water inlet hole, on the one hand, the first ribs on both sides of the water inlet hole can protect the edges of both sides of the water inlet hole to reduce large particles of mud and sand from directly entering the water inlet hole from one side; on the other hand, the first water inlet area formed by the guide plate and the second water inlet area formed by the side of the water guide rib can realize water inlet from three directions to effectively achieve the purpose of anti-blocking, so as to ensure that the water inlet hole can normally inlet water, thereby improving the anti-blocking performance of the anti-blocking dripper and improving the reliability of the drip irrigation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the structural schematic diagrams of an embodiment of the anti-clogging dripper of the present application;

[0029] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle;

[0030] Figure 3This is the second structural diagram of an embodiment of the anti-clogging dripper of the present application;

[0031] Figure 4 This is the third structural diagram of an embodiment of the anti-clogging dripper of the present application;

[0032] Figure 5 for Figure 4 Middle BB section view;

[0033] Figure 6 for Figure 4 Center CC section view. DETAILED DESCRIPTION

[0034] like Figures 1-6 As shown, the present application provides an anti-clogging dripper, comprising a dripper body 100, wherein the dripper body 100 is provided with a water inlet hole 110, and the water inlet hole 110 passes through the dripper body 100;

[0035] A turbulent flow groove 120 and a water outlet groove 130 are provided on the first surface of the dripper body 100. The turbulent flow groove 120 is distributed around the outer side of the water inlet hole 110. One end of the turbulent flow groove 120 is connected to the water inlet hole 110, and the leading end of the turbulent flow groove 120 is connected to the water outlet groove 130. A plurality of alternately arranged water retaining ribs 121 are provided on both sides of the turbulent flow groove 120 along the flow direction of the water flow. A recessed portion 122 is provided on the upstream surface of the water retaining rib 121. The recessed portion 122 is configured to guide the flowing water to form a vortex.

[0036] The second surface of the dripper body 100 is provided with a water inlet groove 140; two first ribs 150 arranged side by side are provided in the water inlet groove 140, and the water inlet hole 110 is located between the two first ribs 150; a plurality of guide plates 160 arranged side by side are provided in the water inlet hole 110, and the guide plates 160 are arranged obliquely relative to the first ribs 150. The guide plates 160 extend out of the water inlet hole 110 and to the ends of the water inlet groove 140. Water guide ribs 170 are also provided on both sides of the guide plates 160, and the water guide ribs 170 are connected to the first ribs 150 on the corresponding sides.

[0037] The two adjacent guide plates 160 form a first water inlet area in the water inlet groove 140 , and the second water inlet area is formed between the side portions of the two adjacent water guide ribs 170 on the same first rib 150 .

[0038] Specifically, a turbulence groove 120 and a water outlet groove 130 are formed on the first surface of the dripper body 100, and a water inlet groove 140 is formed on the second surface of the dripper body 100. The first surface and the second surface of the dripper body 100 are arranged back to back, and the water inlet hole 110 runs through the dripper body 100.

[0039] After the dripper body 100 is processed on the inner tube wall of the drip irrigation pipe, the first surface of the dripper body 100 is combined with the inner tube wall of the drip irrigation pipe, so that a water inlet cavity is formed between the water inlet hole 110 and the inner wall of the pipe body, a turbulent flow channel is formed between the turbulent flow groove 120 and the inner wall of the pipe body, and a water outlet cavity is formed between the water outlet groove 130 and the inner wall of the pipe body.

[0040] During use, the water in the pipe body is subjected to water pressure during the flow process, and the water will flow from the water inlet groove 140 into the water inlet hole 110. The water in the water inlet hole 110 is turbulently processed by the water retaining rib 121 in the turbulent groove 120 and finally flows into the water outlet groove 130.

[0041] As water flows through the turbulence grooves 120, it is blocked by the water retaining ribs 121 arranged alternately and staggered on either side of the turbulence grooves 120, creating a turbulent flow. However, as the water is blocked by the water retaining ribs 121, impurities (silt) in the water flow are blocked by the multiple water retaining ribs 121 at the water inlet end of the turbulence grooves 120. Over time, excessive sediment accumulation on the water retaining ribs 121 at the water inlet end of the turbulence grooves 120 can clog the turbulence grooves 120.

[0042] To this end, a recessed portion 122 is provided on the upstream surface of the water retaining rib 121. The shape of the recessed portion 122 is designed to guide the water flow to form a vortex in the area where the recessed portion 122 is located. For example, the inner concave surface of the recessed portion 122 can be an arc surface. In this way, after the water flow passes through the recessed portion 122, it will be guided by the arc surface to swirl and form a vortex.

[0043] Under the action of the vortex, the swirling water flow can carry away the mud and sand left on the front face of the water retaining rib 121 along with the vortex, thereby reducing the accumulation of mud and sand on the front face of the water retaining rib 121 and causing blockage of the turbulent groove 120, thereby improving the anti-blocking performance.

[0044] As for the water flow at the water inlet groove 140, when it flows into the water inlet hole 110, the water flow can enter the water inlet hole 110 from the first water inlet area. At the same time, the water flow can also flow into the water inlet hole 110 from the second water inlet area formed on the side of the water guide rib 170, thereby realizing water inflow from three directions.

[0045] In this way, during the water inlet process, when blockage occurs in any direction, water can also be introduced through other directions to improve the anti-blocking performance.

[0046] By providing a recessed portion 122 on the water retaining rib 121 of the turbulent groove 120, the recessed portion 122 is formed on the upstream surface of each water retaining rib 121. When the water flows in the turbulent groove 120, after the water flows into the recessed portion 122, the concave structure of the recessed portion 122 will cause the water to swirl at this position to form an eddy current. Under the action of the eddy current, it is possible to prevent sediment from gathering on the upstream surface of the water retaining rib 121 that blocks the flow of water. The sediment will be carried away by the eddy current formed by the recessed portion 122 and eventually enter the water outlet groove 130 for output. In this way, the clogging of the turbulent groove 120 due to excessive sediment accumulation can be reduced. At the same time, In the water inlet groove 140 of the dripper body 100, when the water in the drip irrigation pipe passes through the water inlet groove 140 and flows into the water inlet hole 110, on the one hand, the first ribs 150 on both sides of the water inlet hole 110 can protect the edges on both sides of the water inlet hole 110 to reduce the direct entry of large particles of mud and sand into the water inlet hole 110 from one side; on the other hand, the first water inlet area formed by the guide plate 160 and the second water inlet area formed on the side of the water guide rib 170 can realize water inlet from three directions to effectively prevent blockage, thereby ensuring that the water inlet hole 110 can normally inlet water, thereby improving the anti-blocking performance of the anti-blocking dripper and improving the reliability of the drip irrigation pipe.

[0047] In one embodiment, the recessed portion 122 is further configured to guide the flowing water to flow toward the water retaining ribs 121 that are staggered and arranged adjacently upstream of the water flow.

[0048] Specifically, the recessed portion 122 provided on the water retaining rib 121 in the turbulent groove 120 can form a vortex, and under the action of the vortex, the water flows toward the water retaining rib 121 on the other side of the turbulent groove 120 which is arranged upstream and offset.

[0049] In this way, the water flowing in the turbulence groove 120 will also have a tendency to flow in the opposite direction, reducing the flow velocity of the water in the turbulence groove 120 and enhancing the turbulence capacity of the turbulence groove 120, so as to achieve a better drip irrigation effect.

[0050] Furthermore, the water retaining rib 121 as a whole extends obliquely away from the flow direction of the water in the turbulent flow groove 120;

[0051] The end of the flow-facing surface of the water retaining rib 121 is further provided with a guide surface 123 , and the guide surface 123 extends obliquely along the water flow direction in the turbulent flow groove 120 ;

[0052] The guide surface 123 is configured to guide the water flowing through it to flow toward the water retaining ribs 121 that are staggered and arranged adjacent to each other downstream.

[0053] Specifically, the water retaining rib 121 extends obliquely as a whole in the direction opposite to the flow trend of the water flow, so as to enhance the blocking effect on the water flow.

[0054] The guide surface 123 provided at the end of the flow-facing surface of the water retaining rib 121 can also guide the water flow toward the water retaining rib 121 located downstream and offset on the other side of the turbulent flow groove 120. Under the guidance of the guide surface 123, the water flow is directed toward the concave portion 122 of the next water retaining rib 121, so that the concave portion 122 of the downstream water retaining rib 121 generates a better vortex.

[0055] Furthermore, the recessed portion 122 is arranged at the root of the water retaining rib 121;

[0056] The back-flow surface of the water retaining rib 121 forms a water retaining surface 124 ; the water retaining surface 124 extends obliquely away from the flow direction of the water in the turbulent flow groove 120 ;

[0057] The water retaining surface 124 is configured to guide water to flow toward the water retaining ribs 121 that are staggered and arranged adjacently upstream.

[0058] Specifically, a water retaining surface 124 is formed on the back flow side of the water retaining rib 121. The water retaining surface 124 guides the vortex formed by the downstream water retaining rib 121. After hitting the water retaining surface 124, the vortex is restricted, and part of the water flow forming the vortex will flow back to the water retaining rib 121 where the vortex is generated, so as to improve the effect of the vortex in dispersing impurities and improve the anti-blocking ability.

[0059] In one embodiment of the present application, a second rib 180 is further provided in the water inlet groove 140. The second rib 180 is arranged on the side of the first rib 150. The second rib 180 extends along the extension direction of the first rib 150. The second rib 180 is provided with spaced protrusions 190, and a water flow gap is formed between two adjacent protrusions 190.

[0060] Specifically, a second rib 180 is provided on one side of the first rib 150, and a protrusion 190 protruding outward is provided on the second rib 180. The protrusion 190 can further block mud and other debris, so that the water flowing through the water flow interval and entering the water inlet 110 can be filtered by the protrusion 190.

[0061] Furthermore, the water guide rib 170 extends in a direction perpendicular to the first rib 150 , and the protrusion 190 is arranged opposite to the second water inlet area at a corresponding position.

[0062] Specifically, for the water guide rib 170, the water guide rib 170 extends from the edge of the guide plate 160 toward the outside of the water inlet 110. The extension direction of the water guide rib 170 is perpendicular to the first rib 150 and is directly opposite to the water flow gap formed between the two adjacent protrusions 190 at the corresponding position, so that the water flowing through the water flow gap to the water inlet 110 will hit the water guide rib 170, and the mud and sand mixed in the water flow can be blocked by the water guide rib 170, further playing the role of filtering the mud and sand.

[0063] Preferably, the height of the second rib 180 is greater than the height of the first rib 150;

[0064] A first buffer groove 101 is formed between the second rib 180 and the adjacent first rib 150 , and a second buffer groove 102 is formed between the second rib 180 and the inner groove wall of the water inlet groove 140 .

[0065] Specifically, with respect to the adjacent first ribs 150 and second ribs 180 in the water inlet groove 140, the height of the outer second ribs 180 is higher than that of the first ribs 150. This results in the depth of the first buffer groove 101 being greater than the depth of the second buffer groove 102. In actual use, after water is blocked and filtered by the protrusions 190 of the second ribs 180, sediment can be deposited in the first buffer groove 101 and then flow out along with the water flow.

[0066] The second ribs 180 are taller than the first ribs 150, minimizing the amount of sediment in the water flowing toward the first ribs 150. Water flowing past the second ribs 180 toward the first ribs 150 is blocked by the water guides 170, further filtering the sediment. The filtered sediment is deposited in the second buffer grooves 102, where it can flow out with the water flow.

[0067] The bottom surface of the second buffer groove 102 extends obliquely from the outside to the inside toward the water inlet 110 .

[0068] Specifically, the surface where the dripper body 100 fits with the tube body is usually an arc surface. To this end, the overall depth of the second buffer groove 102 is increased, and the bottom surface of the second buffer groove 102 is arranged at an angle so that the bottom surface of the second buffer groove 102 can be designed to conform to the surface of the dripper body 100 to maximize the depth of the second buffer groove 102. In particular, the depth of the second buffer groove 102 adjacent to the second rib 180 is the largest, so as to more effectively meet the requirements of sediment deposition and thereby improve the filtering effect.

[0069] Furthermore, in order to improve the smoothness of water inflow into the water inlet hole 110 , the end of the guide plate 160 away from the water inlet groove 140 has a smooth structure.

[0070] Specifically, multiple guide plates 160 are arranged side by side along the length direction of the water inlet hole 110, and the water flowing into the water inlet hole 110 will flow toward the turbulence groove 120. In this way, since the guide plate 160 is a smooth structure at the end adjacent to the tube body, the water resistance can be effectively reduced, so that the water entering the water inlet hole 110 can flow smoothly to the turbulence groove 120, thereby improving the smoothness of the water outflow.

[0071] Embodiment 2: Based on the above embodiment 1, another embodiment of the present application further provides a drip irrigation pipe, comprising a pipe body and an anti-blocking dripper of the above embodiment, wherein the anti-blocking dripper is arranged on the inner wall of the pipe body, a water inlet cavity is formed between the water inlet hole of the anti-blocking dripper and the inner wall of the pipe body, a turbulent flow channel is formed between the turbulent flow groove of the anti-blocking dripper and the inner wall of the pipe body, and a water outlet cavity is formed between the water outlet groove of the anti-blocking dripper and the inner wall of the pipe body;

[0072] The tube body is provided with a plurality of water outlet holes, and the water outlet holes are communicated with the corresponding cavities.

[0073] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An anti-blocking dripper, characterized in that: The dripper body comprises a water inlet hole provided on the dripper body and the water inlet hole passes through the dripper body; A turbulence groove and a water outlet groove are provided on the first surface of the dripper body, wherein the turbulence grooves are distributed around the outer side of the water inlet hole, one end of the turbulence groove is connected to the water inlet hole, and the leading end of the turbulence groove is connected to the water outlet groove; a plurality of alternately arranged water retaining ribs are provided on both sides of the turbulence groove along the flow direction of the water flow, and a concave portion is provided on the upstream surface of the water retaining rib, wherein the concave portion is configured to guide the flowing water to form a vortex; A water inlet groove is provided on the second surface of the dripper body; two first ribs arranged side by side are provided in the water inlet groove, and the water inlet hole is located between the two first ribs; a plurality of guide plates arranged side by side are provided in the water inlet hole, and the guide plates are arranged obliquely relative to the first ribs. Water guide ribs are further provided on both sides of the guide plates extending from the water inlet hole to the end of the water inlet groove, and the water guide ribs are connected to the first ribs on the corresponding sides; Two adjacent guide plates form a first water inlet area in the water inlet groove, and a second water inlet area is formed between the side portions of two adjacent water guide ribs on the same first rib.

2. The anti-blocking dripper according to claim 1, characterized in that: The recessed portion is further configured to guide the water flowing therethrough to flow toward the water retaining ribs arranged adjacent to each other and offset upstream of the water flow.

3. The anti-blocking dripper according to claim 2, characterized in that: The water retaining ribs are extended obliquely as a whole in the opposite direction to the flow direction of the water in the turbulent flow groove; The end of the flow-facing surface of the water retaining rib is further provided with a guide surface, and the guide surface extends obliquely along the water flow direction in the turbulent flow groove; The guide surface is configured to guide the water flowing through it to flow toward the water retaining ribs arranged adjacent to each other and staggered downstream.

4. The anti-blocking dripper according to claim 3, characterized in that: The recessed portion is arranged at the root of the water retaining rib; The back-flow surface of the water retaining rib forms a water retaining surface; the water retaining surface extends obliquely away from the flow direction of the water in the turbulent flow groove; The water retaining surface is configured to guide water to flow toward the water retaining ribs arranged adjacent to each other and staggered upstream of the water flow.

5. The anti-blocking dripper according to claim 1, characterized in that: A second rib is also provided in the water inlet groove. The second rib is arranged on the side of the first rib and extends along the extension direction of the first rib. The second rib is provided with spaced protrusions, and a water flow interval is formed between two adjacent protrusions.

6. The anti-clogging dripper according to claim 5, characterized in that: The water guide rib extends in a direction perpendicular to the first rib, and the protrusion is arranged opposite to the second water inlet area at a corresponding position.

7. The anti-clogging dripper according to claim 5, characterized in that: The height of the second rib is greater than the height of the first rib; A first buffer groove is formed between the second rib and the adjacent first rib, and a second buffer groove is formed between the second rib and the inner groove wall of the water inlet groove.

8. The anti-clogging dripper according to claim 5, characterized in that: The end of the guide plate away from the water inlet groove has a smooth structure.

9. A drip irrigation pipe, comprising a pipe body, characterized in that: It also includes the anti-blocking dripper according to any one of claims 1 to 8, wherein the anti-blocking dripper is arranged on the inner wall of the tube body, a water inlet cavity is formed between the water inlet hole of the anti-blocking dripper and the inner wall of the tube body, a turbulent flow channel is formed between the turbulent flow groove of the anti-blocking dripper and the inner wall of the tube body, and a water outlet cavity is formed between the water outlet groove of the anti-blocking dripper and the inner wall of the tube body; The tube body is provided with a plurality of water outlet holes, and the water outlet holes are communicated with the corresponding cavities.

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