Drip irrigation variable emitter and test system

Abstract

The present invention provides a drip irrigation variable emitter and a test system, the drip irrigation variable emitter comprising: a test seat, the test seat having an installation chamber, the test seat being provided with a water inlet channel and a water outlet channel; and an emitter, which is arranged in the installation chamber, the emitter comprising a core body and an elastic member attached to the outer circumference of the core body, an energy dissipation groove being provided on the outer circumference of the core body, the elastic member being arranged corresponding to the energy dissipation groove and covering the energy dissipation groove to seal and define an energy dissipation flow channel, the energy dissipation flow channel being connected to the water inlet channel and the water outlet channel respectively. The drip irrigation variable emitter provided by the present invention can be directly used for hydraulic performance testing in the research and development stage of the emitter, and can also be used for actual production applications. The arrangement of the elastic member enables the emitter to achieve different water outlet flow rates, and the elastic member is arranged corresponding to the energy dissipation groove, which can effectively dredge sediment and prevent sediment accumulation.

Description

Technical Field

[0001] The invention relates to the technical field of drip irrigation, and in particular to a drip irrigation variable emitter and a testing system. Background Art

[0002] The emitter is the core component of the drip irrigation system. It can eliminate the energy of the pressure water flow in the drip irrigation belt and make the water flow evenly and slowly injected into the soil from the outlet. Due to the small size and complex structure of the emitter, there are few methods to test the hydraulic performance of the emitter in the research and development stage. The following three methods are mainly used: 1. Establish a three-dimensional model and calculate the water flow rate of the emitter through numerical simulation of computational fluid dynamics; 2. Process a proportionally enlarged emitter model and test its hydraulic performance; 3. Open the mold and inject the emitter, use the production line to produce the drip irrigation belt embedded with the tested emitter and test its flow rate. For the first two methods, there is an error between the simulated calculation value or the actual measurement value and the actual value, which cannot characterize the actual working performance of the emitter, and it is also difficult to accurately adjust the internal size of the emitter. For the third method, the production of samples by opening the mold and improving the production line greatly increases the R&D cost and R&D cycle.

[0003] Underground drip irrigation is a method of irrigation in which the drip irrigation belt and its emitter are buried in the soil, water or a mixture of water and fertilizer is slowly infiltrated into the root zone of the crop, and then the water is diffused to the root layer by capillary action or gravity for the crop to absorb and utilize. In order not to affect soil cultivation, the capillary tube needs to be buried below the tillage layer (≥30cm). Because the bulk density of the surface soil is too small and the capillary action is too weak, the water supply of the small-flow emitter is difficult to rise to the surface where the seeds are buried, resulting in a lower germination rate and a reduction in yield. In the seed germination stage, sprinkler irrigation or ground irrigation with a larger flow rate is generally used, which requires two irrigation systems and increases investment costs.

[0004] In areas with serious soil salinization, such as Xinjiang and Inner Mongolia, it is essential to use large-scale flooding for autumn or winter irrigation to wash away soil salt. However, the water flow rate of commonly used underground sprinklers is small, which is not suitable for the growth of crops during the growth period, and the salt suppression effect is not good. The commonly used technical measures are to use drip irrigation during the crop growth period, and use surface irrigation or sprinkler irrigation during autumn, winter or spring irrigation, which will also increase project investment.

[0005] Ecological protection and high-quality development of the Yellow River Basin have put forward new requirements for the Yellow River irrigation. Drip irrigation from the Yellow River can alleviate the water shortage problem in the Yellow River basin, but the silt blockage problem caused by drip irrigation from the Yellow River has never been effectively solved, which seriously restricts the development of drip irrigation technology in the Yellow River irrigation area, especially for underground drip irrigation systems. Blockage of the emitter means that the irrigation system needs to be dismantled and rebuilt.

[0006] CN112205282B discloses a drip irrigation device and a drip irrigation system. The drip irrigation device includes a flow channel body and an elastic body, wherein the elastic body is installed on the outer peripheral surface of the flow channel body and fits with the outer peripheral surface of the flow channel body in a spontaneous state, and the flow channel body includes an energy dissipation body, wherein a first water passage is formed in the energy dissipation body, wherein the first water passage is connected to the two ends of the energy dissipation body, and the first water passage forms a radial drainage passage at both ends of the first water passage and the inner wall of the elastic body. The technical problem that the drip irrigation device cannot adapt to different flow requirements is solved, and the technical effect of being able to adapt to normal small flow drip irrigation requirements and large water output requirements is achieved. Although the drip irrigation emitter can adapt to the drip irrigation needs of different flow rates, during the expansion of the elastomer, the mud and sand are carried by the water flow and fill every corner of the inner wall of the elastomer. When the pressure decreases and the elastomer slowly returns to its original state, the mud and sand near the first water flow channel will be carried away by the water flow. However, the mud and sand in other areas will accumulate between the elastomer and the core body due to the small scouring force of the water flow and the obstruction of the elastomer, thereby preventing the elastomer from returning to the fitting state with the outer peripheral surface of the flow channel, thereby affecting the drip irrigation emitter to achieve small flow drip irrigation.

[0007] Therefore, providing a variable drip irrigation emitter with good hydraulic performance and a testing system that is easy to develop is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0008] Based on the difficulties faced by the above-mentioned product research and development optimization and the problems encountered by the three underground drip irrigation technologies in agricultural production, the present invention provides a drip irrigation variable emitter and a testing system to solve the problems in the prior art that the emitter development process is difficult to test and the high-sand content water drip irrigation process is prone to blockage.

[0009] In view of the problems existing in the prior art, an embodiment of the present invention provides a drip irrigation variable emitter, comprising:

[0010] A test seat, the test seat having a mounting chamber, the test seat being provided with a water inlet channel and a water outlet channel; and,

[0011] The emitter is arranged in the installation chamber, and the emitter includes a core body and an elastic member attached to the outer circumference of the core body. The outer circumference of the core body is provided with an energy dissipation groove. The elastic member is arranged corresponding to the energy dissipation groove and covers the energy dissipation groove to seal and define an energy dissipation flow channel, and the energy dissipation flow channel is respectively connected to the water inlet channel and the water outlet channel.

[0012] According to a drip irrigation variable emitter provided by the present invention, the inner wall surface of the installation chamber is arranged in close contact with the core body and the elastic member, and the inner wall surface of the installation chamber has an expansion space corresponding to the energy dissipation groove for accommodating the expansion of the elastic member.

[0013] According to a drip irrigation variable emitter provided by the present invention, an expansion groove is opened on the inner wall surface of the installation chamber, the expansion groove is arranged corresponding to the energy dissipation groove and has the same shape as the energy dissipation groove, and the expansion groove is used to form the expansion space.

[0014] According to a drip irrigation variable emitter provided by the present invention, the emitter includes a mounting tube sleeved on the outer circumference of the core body, the inner wall surface of the mounting tube is sealed against the outer circumference of the core body, and the mounting tube is provided with the elastic member corresponding to the energy dissipation groove.

[0015] According to a variable drip irrigation emitter provided by the present invention, the energy dissipation flow channel comprises a plurality of flow channel branches connected in sequence, each of the flow channel branches is opened on the outer peripheral surface of the core body, and each of the flow channel branches is provided with a plurality of flow channel teeth, so that each of the flow channel branches is arranged in a bent configuration;

[0016] The flow channel branches are arranged at intervals on the outer peripheral surface of the core body, and the energy dissipation flow channel also includes a drainage branch connecting the flow channel branches.

[0017] According to a drip irrigation variable emitter provided by the present invention, a water inlet pipe and a water outlet pipe are respectively provided at both ends of the test seat located at the installation chamber, the water inlet channel is formed in the water inlet pipe, and the water outlet channel is formed in the water outlet pipe, and the two ends of the core body are respectively plugged with the water inlet pipe and the water outlet pipe so that the energy dissipation flow channel is connected with the water inlet channel and the water outlet channel respectively.

[0018] According to a variable drip irrigation emitter provided by the present invention, plug-in parts are formed at both ends of the core body, and each of the plug-in parts is used to be plugged with the water inlet pipe and the water outlet pipe respectively;

[0019] A plurality of positioning protrusions are arranged on each of the plug-in parts, and a plurality of positioning grooves are correspondingly opened on the inner wall surface of the installation chamber. Each of the positioning protrusions is matched with each of the positioning grooves to locate the installation position of the core body.

[0020] According to a drip irrigation variable emitter provided by the present invention, a water inlet channel is formed in one of the plug-in parts, and a water outlet channel is formed in the one of the plug-in parts. One end of the water inlet channel is connected to the water inlet channel, and the other end is connected to the energy dissipation groove. One end of the water outlet channel is connected to the energy dissipation groove, and the other end is connected to the water outlet channel.

[0021] According to a drip irrigation variable emitter provided by the present invention, the test seat comprises a first seat body and a second seat body, the first seat body and the second seat body are respectively provided with a mounting groove, and the two mounting grooves enclose the mounting chamber;

[0022] A mounting block is protruded from one side of the first base body toward the second base body, and a positioning groove is correspondingly provided on one side of the second base body toward the first base body, so that the first base body and the second base body can be detachably connected.

[0023] According to a variable drip irrigation emitter provided by the present invention, a plurality of detection holes are formed in the second seat body corresponding to the expansion groove, and each of the detection holes is connected to the expansion groove through penetration.

[0024] According to a drip irrigation variable emitter provided by the present invention, a test tube is sleeved on the outer periphery of the emitter, the test tube is non-elastic, and the inner wall surface of the test tube is sealed against the outer periphery of the core body and the elastic member.

[0025] The present invention also provides a drip irrigation variable emitter testing system, comprising:

[0026] A drip irrigation variable emitter, wherein the drip irrigation variable emitter is the drip irrigation variable emitter as described in any one of the above items.

[0027] The variable drip irrigation emitter provided by the present invention can be directly connected to the test system in the research and development stage by setting a test seat, and a water source is introduced to set different water inlet pressures to monitor the water outlet flow of a single emitter; in the research and development or actual application stage, under conventional water pressure, the elastic member is attached to the energy dissipation groove and the water flow can pass through the energy dissipation flow channel. When the water pressure increases, the elastic member will expand, so that the water flow through the energy dissipation flow channel increases, meeting the irrigation demand of large flow; in addition, the elastic member is set corresponding to the energy dissipation groove, so that the sediment can only accumulate in the energy dissipation groove, and the sediment will be carried away by the water flow after the elastic member is deformed or the deformation ends, thereby solving the problem that the sediment accumulates in the area outside the energy dissipation groove and affects the rebound of the elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a variable drip irrigation emitter provided by the present invention;

[0030] Figure 2 yes Figure 1 Schematic diagram of the disassembled structure;

[0031] Figure 3 yes Figure 1 Section view along AA direction;

[0032] Figure 4 yes Figure 1 Cross-sectional view along BB at small water flow rate;

[0033] Figure 5 yes Figure 1 Cross-sectional view along BB at large water flow rate;

[0034] Figure 6 yes Figure 1 Cross-sectional view along CC direction at small water flow rate;

[0035] Figure 7 yes Figure 1 Schematic diagram of the three-dimensional structure of the core body (the energy dissipation channel is in a perspective state);

[0036] Figure 8 yes Figure 1 A schematic diagram of the three-dimensional structure of the first seat body;

[0037] Fig. 9 yes Figure 1 A schematic diagram of the three-dimensional structure of the second seat body;

[0038] Fig.10 yes Figure 1 Schematic diagram of the hydraulic performance test results of the drip irrigation variable emitter.

[0039] Reference numerals:

[0040] 1: Drip irrigation variable emitter; 2: Test socket; 3: Emitter;

[0041] 4: Installation chamber; 5: Expansion tank; 6: Water inlet pipe;

[0042] 7: water inlet channel; 8: water outlet pipe; 9: water outlet channel;

[0043] 10: first seat body; 11: mounting groove; 12: second seat body;

[0044] 13: Mounting hole; 14: Fastening bolt; 15: Core;

[0045] 16: elastic member; 17: mounting pipe; 18: energy dissipation groove;

[0046] 19: energy dissipation flow channel; 20: plug-in part; 21: flow channel branch;

[0047] 22: flow channel teeth; 23: drainage branch; 24: positioning protrusion;

[0048] 25: Positioning groove; 26: Sealing ring; 27: Water inlet channel;

[0049] 28: Water outlet channel; 29: Detection hole. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0053] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Combine the following Figure 1-Figure 10 The present invention describes the drip irrigation variable emitter and testing system.

[0056] In the prior art, the development process of the emitter is difficult to test. In actual use, although some emitters can adapt to different water flow requirements, due to structural limitations, it is easy to cause sedimentation, difficult elastic body recovery, and unstable use effect in the process of achieving different water flow rates. In view of this, the present invention provides a drip irrigation variable emitter 1, including: a test seat 2, the test seat 2 has an installation chamber 4, and the test seat 2 is provided with a water inlet channel 7 and a water outlet channel 9; the development test of traditional emitters or emitters generally requires hydraulic performance testing after the emitter is processed into a whole drip irrigation belt. The present invention can be directly connected to the test system by setting the test seat 2, introducing water sources to set different water inlet pressures, and monitoring the water flow of a single drip irrigation variable emitter 1, which can save R&D investment and shorten the R&D cycle.

[0057] The variable drip irrigation emitter 1 also includes an emitter 3, which is arranged in the installation chamber 4. The emitter 3 includes a core 15 and an elastic member 16 attached to the outer peripheral surface of the core 15. An energy dissipation groove 18 is provided on the outer peripheral surface of the core 15. The elastic member 16 is arranged corresponding to the energy dissipation groove 18 and covers the energy dissipation groove 18 to seal and define an energy dissipation flow channel 19. The energy dissipation flow channel 19 is respectively connected to the water inlet channel 7 and the water outlet channel 9. It should be noted that the emitter in the traditional technology cannot adjust the flow rate adaptively according to the water supply pressure. Some of the few emitters can adjust the flow rate (such as the patent CN112205282B described in the background technology), but when there is a lot of sediment in the water flow, the sediment will accumulate and block the elastic body and the core body, especially the sediment accumulated in the area outside the energy dissipation channel will affect the elastic body rebound, thereby affecting the sealing and fitting of the elastic body. In the emitter 3 provided by the present invention, the elastic member 16 is arranged corresponding to the energy dissipation groove 18. On the one hand, under a relatively small inlet pressure, the elastic member 16 is arranged to be attached to the surface of the core body 15, and the water flow can only pass through the energy dissipation channel 19; when the inlet pressure increases, the elastic member 16 expands, which can increase the cross-sectional area of ​​the energy dissipation channel 19 and improve the water flow rate; on the other hand, in some areas, the water flow carries too much sediment, which can easily cause the emitter 3 to be blocked. In the technical solution provided by the present invention, when the energy dissipation groove 18 is blocked by sediment, the water pressure increases, which also causes the elastic member 16 to expand, and the increased water flow will wash away the accumulated sediment to prevent the emitter 3 from being blocked; more importantly, the elastic member 16 provided by the present invention is only arranged corresponding to the energy dissipation groove 18, so that the sediment will not leave the area where the energy dissipation groove 18 is set. Whether the elastic member 16 is deformed or after the elastic member 16 is deformed, the sediment will not be washed away by the water flow due to the wrapping of the elastic member 16, and will remain on the surface of the core body 15. The variable drip irrigation emitter 1 provided by the present invention significantly increases the service life of the emitter 3, making the use effect of the emitter 3 more stable.

[0058] The variable drip irrigation emitter 1 provided by the present invention can be applied to occasions where a large water flow rate is required from the underground drip irrigation system, such as when the capillary action of the surface soil is weak and it is necessary to ensure the emergence of crops, or to wash away the salt in the soil; or when the water source has a large sediment content and the emitter is easily blocked. The variable drip irrigation emitter 1 can meet the needs of ordinary small-flow drip irrigation water supply scenarios, and can also be applied to occasions that require a larger flow rate, without the need to build a separate irrigation system, saving engineering investment.

[0059] As mentioned above, the elastic member 16 is arranged corresponding to the energy dissipation groove 18. The elastic member 16 can be arranged only at the notch of the energy dissipation groove 18, or the elastic member 16 can be entirely covered on the surface of the energy dissipation groove 18. Both methods can effectively limit the deformation area of ​​the elastic member 16, so that the deformation is concentrated near the energy dissipation groove 18. However, the elastic member 16 is generally a rubber material, which will deform when subjected to force, making it difficult to seal, and the deformation of the elastic member 16 will not be restricted. In order to better achieve the limiting effect on the deformation area of ​​the elastic member 16, in the technical solution provided by the present invention, most of the inner wall surface of the installation chamber 4 is sealed with the elastic member 16, and the inner wall surface of the part of the installation chamber 4 corresponding to the energy dissipation groove 18 is provided with an expansion space for accommodating the expansion of the elastic member 16. It can be understood that the installation chamber 4 wraps the core 15 and the elastic member 16 on its surface, and the inner wall of the installation chamber 4 has an expansion space corresponding to the energy dissipation groove 18. The expansion space limits the expansion of the elastic member 16, so that the elastic member 16 can only expand in the area corresponding to the energy dissipation groove 18 (the other areas are tightly attached to the surface of the core 15 due to the wrapping effect of the installation chamber 4). In this way, when the elastic member 16 expands or rebounds, the mud and sand can only move in the energy dissipation groove 18, and will not accumulate in other places to affect the rebound of the elastic member 16 and the formation of a small flow rate of water outflow.

[0060] Specifically, the inner wall surface of the installation chamber 4 is provided with an expansion groove 5, which is arranged corresponding to the energy dissipation groove 18. The expansion groove 5 can be the same in shape and size as the energy dissipation groove 18, or can be a rectangular groove with an appropriate area or a groove of other shapes, which is similar in size to the energy dissipation groove 18. The expansion groove 5 is mainly used to form an expansion space. When the elastic member 16 expands, the elastic member 16 is confined to the area of ​​the expansion groove 5, and other places are kept in a sealed fit with the core 15, so that the sediment can be confined to the area where the energy dissipation groove 18 is located, and the sediment particles are prevented from entering other parts with the water flow to affect the movement of the elastic body 16 and the water flow rate.

[0061] It should be noted that, in order to facilitate the arrangement of the elastic member 16, in the technical solution provided by the present invention, the sprinkler 3 includes a mounting tube 17 sleeved on the outer peripheral surface of the core body 15, the inner wall surface of the mounting tube 17 is sealed and fitted with the outer peripheral surface of the core body 15, and the mounting tube 17 is provided with an elastic member 16 at the energy dissipation groove 18. It can be understood that the mounting tube 17 facilitates the installation of the elastic member 16, and the mounting tube 17 is provided with an elastic member 16 at the energy dissipation groove 18. If there is no expansion groove 5, the shape of the elastic member 16 needs to be compatible with the shape of the energy dissipation groove 18 (the energy dissipation groove 18 is strip-shaped, and the elastic member 16 is a strip of the same size), and the other areas of the mounting tube 17 should be non-elastic adhesive sealing materials; if there is an expansion groove 5, the shape of the elastic member 16 can be unrestricted, and even the entire mounting tube 17 can be elastic, and the present invention does not limit this.

[0062] The energy dissipation channel 19 is mainly used to reduce the pressure of the water flow, so that the incoming water flows out according to the irrigation demand flow rate through the energy dissipation effect of the energy dissipation channel 19. In the technical solution provided by the present invention, the energy dissipation channel 19 includes a plurality of channel branches 21 connected in sequence, each of which is opened on the outer peripheral surface of the core 15, and each of which is provided with a plurality of channel teeth 22, so that each of the channel branches 21 is arranged in a bent state. The setting of a plurality of channel branches 21 can effectively extend the movement path of the water flow on the core 15, reduce the water pressure as much as possible according to the design requirements on the limited volume of the core 15, and the setting of the channel teeth 22 makes the water flow collide and detour in the channel branch 21, which can effectively increase the resistance of the water flow when passing through, and reduce the pressure and flow of the water flow reaching the outlet, thereby realizing the provision of a small flow of water supply when the elastic member 16 is not expanded.

[0063] Furthermore, the flow channel branches 21 are arranged at intervals on the outer peripheral surface of the core body 15. In this embodiment, the core body 15 is set to be cylindrical, and the flow channel branches 21 extend along the axial direction of the core body 15, and each flow channel branch 21 is arranged in parallel. The energy dissipation flow channel 19 also includes a drainage branch 23 connecting each flow channel branch 21. The drainage branch 23 is a common flow channel without a flow channel tooth 22, and is mainly used to connect each flow channel branch 21.

[0064] Specifically, the test socket 2 is provided with a water inlet pipe 6 and a water outlet pipe 8 at both ends of the installation chamber 4, a water inlet channel 7 is formed in the water inlet pipe 6, and a water outlet channel 9 is formed in the water outlet pipe 8. The two ends of the core body 15 are respectively plugged with the water inlet pipe 6 and the water outlet pipe 8, so that the energy dissipation channel 19 is connected with the water inlet channel 7 and the water outlet channel 9 respectively. It should be noted that the core body 15 needs to be sealed with the water inlet pipe 6 and the water outlet pipe 8, so that the incoming water can only flow into the water outlet pipe 8 through the energy dissipation channel 19 on the surface of the core body 15. In the technical solution provided by the present invention, plug-in parts 20 are formed at both ends of the core body 15, and each plug-in part 20 is provided with a plurality of positioning protrusions 24. The test socket 2 includes a first seat body 10 and a second seat body 12, and the first seat body 10 and the second seat body 12 are correspondingly provided with a plurality of positioning grooves 25, and the positioning protrusions 24 are adapted to the positioning grooves 25. It should be noted that the positioning protrusions 24 are protrusions of different shapes, and the corresponding positioning grooves 25 are also grooves of different shapes, and the first seat body 10 and the second seat body 12 may be provided with positioning grooves 25 of different shapes, respectively. The arrangement of the positioning protrusions 24 and the positioning grooves 25, on the one hand, facilitates the installation and positioning of the core body 15, and on the other hand, allows the installation positions of the expansion groove 5 and the energy dissipation groove 18 to correspond. In order to further improve the sealing effect, a sealing ring 26 is also sleeved on the plug-in portion 20, and each sealing ring 26 is used to seal and connect the core body 15 with the water inlet pipe 6 and the water outlet pipe 8.

[0065] Please refer to the attached drawings. In the technical solution provided by the present invention, an inlet flow channel 27 is formed in one plug-in part 20, and an outlet flow channel 28 is formed in one plug-in part 20. One end of the inlet flow channel 27 is connected to the inlet channel 7, and the other end is connected to the energy dissipation groove 18. One end of the outlet flow channel 28 is connected to the energy dissipation groove 18, and the other end is connected to the outlet channel 9. It can be seen that the inlet flow channel 27 and the outlet flow channel 28 are arranged inside the plug-in part 20, connected to the inlet pipe 6 and the outlet pipe 8 on both sides, and then bent from the inside of the core body 15 to be exposed on the surface of the core body 15, and the exposed opening is connected to the energy dissipation groove 18.

[0066] Further, as mentioned above, in order to facilitate the installation and testing of the sprinkler 3, the test seat 2 is divided into two parts. The test seat 2 includes a first seat body 10 and a second seat body 12. The first seat body 10 and the second seat body 12 are each provided with a mounting groove 11. The two mounting grooves 11 enclose the mounting chamber 4. A mounting block is protruding from the side of the first seat body 10 facing the second seat body 12, and a positioning groove is provided on the side of the second seat body 12 facing the first seat body 10, so that the first seat body 10 and the second seat body 12 can be detachably connected. Of course, the setting positions of the mounting block and the positioning groove can be interchanged. The mounting block and the positioning groove mainly play the role of installation and positioning between the first seat body 10 and the second seat body 12, and the present invention does not limit this. In order to further improve the installation effect of the test seat 2, a plurality of mounting holes 13 are correspondingly provided on the first seat body 10 and the second seat body 12, and the test seat 2 also includes a fastening bolt 14 installed in each mounting hole 13.

[0067] Furthermore, the second seat body 12 is provided with a plurality of detection holes 29 corresponding to the expansion slot 5, and each detection hole 29 is connected to the expansion slot 5. The detection holes 29 are used to detect the sealing condition during the R&D test stage and in actual use, so as to avoid the water pressure between the elastic member 16 and the expansion slot 5 due to the poor connection and sealing between the core body 15 and the water inlet pipe 6 and the water outlet pipe 8, so that the deformation of the elastic member 16 is hindered, and the test result does not meet the R&D purpose due to water leakage; on the other hand, the setting of the detection holes 29 can make the deformation of the elastic member 16 smoother, and the deformation of the elastic member 16 will not be hindered because the air in the expansion slot 5 is difficult to compress.

[0068] Furthermore, the research and development process of the sprinkler 3 involves two stages. The first stage is the hydraulic performance of the sprinkler 3 when the elastic body is not deformed. The rated flow rate of this stage needs to meet the design requirements, and the flow index x needs to meet the national standard requirements; the second stage is the hydraulic performance of the sprinkler 3 when the elastic body 16 is deformed. Since the core 15 and its flow channel branch 21 are both new structural forms, it is first necessary to set different lengths, widths, angles and other structural parameter combinations of the flow channel teeth 22 to ensure that the hydraulic performance of the first stage meets the requirements. Since the sprinkler 3 provided by the present invention is provided with an elastic member 16, it is impossible to ensure that the elastic member 16 does not deform during the actual test process. Therefore, in order to obtain the measured parameters of the first stage, in the technical solution provided by the present invention, the outer periphery of the sprinkler 1 is also provided with a test tube, which is non-plastic and the inner wall of the test tube is sealed and fitted with the outer periphery of the core 15 and the elastic member 16. It should be noted that during the research and development process, if it is necessary to test the hydraulic performance of the first stage, the test tube can be installed on the surface of the mounting tube 17 to limit the deformation of the elastic member 16 (if there is no mounting tube 17, it can be directly set on the outer surface of the core 15). After the first stage test is completed, the test tube is removed and the hydraulic performance of the second stage can be directly measured. Of course, it should be noted that in actual application scenarios, there is no need to set up a test tube.

[0069] On the basis of the above-mentioned drip irrigation variable emitter 1, the present invention also provides a test system, including the above-mentioned drip irrigation variable emitter 1. The test system needs to include devices such as a water pump, a pressure gauge, and a flow tester. In the actual R&D test process, the system is first connected, and then the water source is introduced to set different water inlet pressures. The actual water flow rate of a single emitter can be measured. There is no need to enlarge the processing or open the mold for injection molding to measure the entire drip irrigation belt, which can save R&D investment and shorten the R&D cycle. Since the relevant devices and test methods of the test system are mainly existing technologies, the present invention will not elaborate on its specific structure. In addition, it should be noted that the drip irrigation variable emitter 1 provided by the present invention can be used in both the R&D stage and the actual production process. On the one hand, it improves the R&D efficiency of the drip irrigation variable emitter 1, and on the other hand, it also improves the application effect of the drip irrigation variable emitter 1.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable drip irrigation emitter, characterized in that: include: A test seat, the test seat having a mounting chamber, and the test seat being provided with a water inlet channel and a water outlet channel; as well as, An emitter is arranged in the installation chamber, the emitter comprises a core body and an elastic member attached to the outer circumference of the core body, an energy dissipation groove is provided on the outer circumference of the core body, the elastic member is arranged corresponding to the energy dissipation groove and covers the energy dissipation groove to seal and define an energy dissipation flow channel, the energy dissipation flow channel is respectively connected to the water inlet channel and the water outlet channel; The inner wall surface of the installation chamber is fitted with the core body and the elastic member, and the inner wall surface of the installation chamber has an expansion space corresponding to the energy dissipation groove for accommodating the expansion of the elastic member; An expansion groove is provided on the inner wall surface of the installation chamber. The expansion groove is arranged corresponding to the energy dissipation groove and has the same shape as the energy dissipation groove. The expansion groove is used to form the expansion space.

2. The variable drip irrigation emitter according to claim 1, characterized in that: The sprinkler comprises a mounting tube sleeved on the outer peripheral surface of the core body, the inner wall surface of the mounting tube is sealed against the outer peripheral surface of the core body, and the elastic member is arranged at the mounting tube corresponding to the energy dissipation groove.

3. The variable drip irrigation emitter according to claim 1, characterized in that: The energy dissipation flow channel comprises a plurality of flow channel branches connected in sequence, each of the flow channel branches is opened on the outer peripheral surface of the core body, and each of the flow channel branches is provided with a plurality of flow channel teeth, so that each of the flow channel branches is arranged in a bent configuration; The flow channel branches are arranged at intervals on the outer peripheral surface of the core body, and the energy dissipation flow channel also includes a drainage branch connecting the flow channel branches.

4. The variable drip irrigation emitter according to claim 1, characterized in that: The test seat is located at both ends of the installation chamber and is respectively provided with a water inlet pipe and a water outlet pipe. The water inlet pipe forms the water inlet channel, and the water outlet pipe forms the water outlet channel. The two ends of the core body are respectively connected to the water inlet pipe and the water outlet pipe so that the energy dissipation flow channel is connected to the water inlet channel and the water outlet channel respectively.

5. The variable drip irrigation emitter according to claim 4, characterized in that: Both ends of the core body are respectively formed with plug-in parts, and each of the plug-in parts is used to be plugged with the water inlet pipe and the water outlet pipe respectively; A plurality of positioning protrusions are arranged on each of the plug-in parts, and a plurality of positioning grooves are correspondingly opened on the inner wall surface of the installation chamber. Each of the positioning protrusions is matched with each of the positioning grooves to locate the installation position of the core body.

6. The variable drip irrigation emitter according to claim 5, characterized in that: A water inlet channel is formed in one of the plug-in parts, and a water outlet channel is formed in the other of the plug-in parts. One end of the water inlet channel is connected to the water inlet channel, and the other end is connected to the energy dissipation groove. One end of the water outlet channel is connected to the energy dissipation groove, and the other end is connected to the water outlet channel.

7. The variable drip irrigation emitter according to claim 1, characterized in that: The test seat comprises a first seat body and a second seat body, wherein the first seat body and the second seat body are respectively provided with a mounting groove, and the two mounting grooves are enclosed to form the mounting chamber; A mounting block is protruded from one side of the first base body toward the second base body, and a positioning groove is correspondingly provided on one side of the second base body toward the first base body, so that the first base body and the second base body can be detachably connected.

8. The variable drip irrigation emitter according to claim 7, characterized in that: The second seat body is provided with a plurality of detection holes at locations corresponding to the expansion slot, and each of the detection holes is connected to the expansion slot through and through.

9. The variable drip irrigation emitter according to claim 1, characterized in that: A test tube is also sleeved on the outer circumference of the emitter. The test tube is non-elastic, and the inner wall surface of the test tube is sealed against the outer circumference of the core body and the elastic member.

10. A drip irrigation variable emitter testing system, characterized in that: It comprises the drip irrigation variable emitter as described in any one of claims 1-9.

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