Visual test system and test method for small-flow drip irrigation drippers

Abstract

The invention discloses a small-flow drip irrigation emitter visualization test system and test method, and relates to the technical field of agricultural water-saving drip irrigation emitter modeling tests. The system comprises a water tank, an air pump, a first bracket, a visual device, a camera, a PC (Personal Computer), an injector, a second bracket and a magnetic stirrer. According to the small-flow drip irrigation emitter visualization test system, the adopted visualization device is provided with the emitter flow channel structure, the main body structure is good in transparency performance, the small-flow drip irrigation emitter can be simulated, meanwhile, the fluid flow rule in the emitter flow channel which is a complex boundary flow channel can be revealed more clearly and visually, and the test efficiency is improved. And a basis is provided for the design of a high-performance water dropper which is uniform in drip irrigation and high in blockage resistance.

Description

Technical Field

[0001] The invention relates to the technical field of modeling test of agricultural water-saving drip irrigation drippers, and in particular to a visualization test system and a test method for small-flow drip irrigation drippers. Background Art

[0002] Since the emergence of drip irrigation technology, experts and scholars at home and abroad have devoted a lot of energy and material resources to the research and development of drip irrigation equipment. Drip irrigation drippers are one of the most critical components of the drip irrigation system. Their function is to allow the pressurized water flow to fully dissipate energy through its internal narrow and long flow channel structure or micropores, and drip into the soil at a stable and uniform low flow rate. The width of the dripper flow channel is very narrow, and the water flow rate is also very small. It is very easy to be blocked by dirt in the water and become scrapped. The structure of the dripper and the quality of its hydraulic performance have a great influence on the uniformity of the drip irrigation system, the anti-clogging ability, and the system life. To design a high-performance dripper, you must have a more comprehensive understanding of the flow mechanism inside the dripper.

[0003] The labyrinth dripper is the most widely used type of dripper. The pressure head loss is caused by the combined effects of factors such as pipe wall friction, sharp bends in the flow channel, and contraction and expansion of the flow channel. Due to the complexity and opacity of the dripper flow channel structure, it is urgent to establish accurate dripper flow channel geometry parameter testing technology in order to clearly and intuitively reveal the fluid flow law in the complex boundary flow channel of the dripper flow channel, and provide a basis for the design of high-performance drippers. Summary of the invention

[0004] The purpose of the present invention is to provide a visualization test system and test method for a small-flow drip irrigation dripper. The system can simulate a small-flow drip irrigation dripper and more clearly and intuitively reveal the fluid flow law in a complex boundary flow channel such as a dripper flow channel, thereby providing a basis for the design of a high-performance dripper with uniform drip irrigation and high anti-clogging performance.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A visualization test system for a small-flow drip irrigation dripper, comprising a water tank, an air pump, a first bracket, a visualization device, a camera, and a PC; The water tank comprises an upper cover, a cylinder, a lower cover, and long bolts. An upper boss is arranged in the middle of the upper cover, a second sealing groove is arranged on the outer side of the upper boss, a second threaded hole, a third threaded hole, a fourth threaded hole, and a fifth threaded hole are arranged on the upper boss, a pressure reducing valve, a second direct joint, an air release valve, and a second pressure gauge are respectively installed at the second threaded hole, the third threaded hole, the fourth threaded hole, and the fifth threaded hole, and a plug is installed on the second direct joint. A plurality of twelfth through holes are arranged on the outer peripheral surface of the upper cover, a stepped lower boss is arranged in the middle of the lower cover, a third sealing groove is arranged on the outer side of the lower boss, a fifth blind hole and a sixth blind hole are arranged on the top surface of the lower boss, the fifth blind hole and the sixth blind hole are respectively connected with the first threaded blind hole and the second threaded blind hole arranged at the same height on the outer side of the lower boss, and the third sealing groove is arranged at a high A plurality of thirteenth through holes corresponding to the plurality of twelfth through holes are arranged on the outer circumferential surface of the lower cover in the first threaded blind hole, and the long bolts pass through the twelfth through hole and the thirteenth through hole to fix the upper cover, the cylinder body and the lower cover in sequence, and sealing rings are installed in the second sealing groove and the third sealing groove; the first threaded blind hole and the second threaded blind hole are respectively threadedly installed with a first water outlet joint and a second water outlet joint, and the first water outlet joint is connected to a throttle valve, a second three-way joint, a first three-way joint, a first direct joint and a visualization device in sequence through a first water outlet pipe, a one-way valve and a syringe are installed in sequence on the other outlet of the second three-way joint, and a first pressure gauge is installed on the other outlet of the first three-way joint; the second water outlet joint is connected to a second water outlet pipe, and a ball valve is arranged on the second water outlet pipe; The air pump is connected to the pressure reducing valve via an air inlet pipe; The first bracket is provided with a plurality of fourteenth through holes, and the plurality of fourteenth through holes are fixedly connected with the corresponding lower through holes on the lower cover by using first bolts, so that the water tank is fixed on the first bracket; The visualization device is used to simulate a small flow drip irrigation dripper, and its main body is made of transparent material. A measuring cylinder is arranged below the visualization device; The camera is located behind the visualization device and is electrically connected to the PC. The camera is used to record the movement process of the fluid in the visualization device, and the PC processes and analyzes the data information transmitted by the camera.

[0006] In one of the preferred embodiments of the present invention, the visualization device includes a flange, a first cover plate, and a first bottom plate. A first threaded hole threadedly connected to the first direct joint is arranged at the center of the flange. A plurality of first through holes are arranged on the outer circumference of the flange. A plurality of second through holes, a plurality of third through holes, a first blind hole, a fourth through hole, and a second blind hole are arranged on the first cover plate. The outlet of the second blind hole is located directly above the measuring cylinder. The fourth through hole is connected to the first threaded hole. A first sealing groove is arranged on the disk surface between the fourth through hole and the first threaded hole on the flange. A sealing ring is installed in the first sealing groove. A plurality of fifth through holes, a plurality of sixth through holes, a first water storage tank, a first labyrinth flow channel, and a first water inlet tank are arranged on the first bottom plate. The inlet end of the first water inlet tank is connected to the fourth through hole. The first water inlet tank, the first labyrinth flow channel, the first water storage tank, the first blind hole, and the second blind hole are connected in sequence. The first through hole, the third through hole, and the sixth through hole are fixedly connected by a second bolt, and the second through hole and the fifth through hole are fixedly connected by a third bolt.

[0007] Furthermore, the first cover plate and the first bottom plate are both made of transparent acrylic material, and the first cover plate and the first bottom plate are bonded by a special adhesive for acrylic material.

[0008] In one of the preferred embodiments of the present invention, the visualization device includes a flange, a second cover plate, and a second bottom plate. A first threaded hole threadedly connected to the first direct head is arranged at the center of the flange. A plurality of first through holes are arranged on the outer circumference of the flange. A plurality of seventh through holes, a plurality of eighth through holes, a ninth through hole, a third blind hole, and a fourth blind hole are arranged on the second cover plate. The third blind holes and the fourth blind holes are both multiple and connected one by one. A measuring cylinder is placed under each fourth blind hole. A plurality of eighth through holes are connected to the first threaded hole. A first sealing hole is arranged on the disk between the eighth through hole and the first threaded hole on the flange. A sealing groove, a sealing ring is installed in the first sealing groove, a plurality of tenth through holes, a plurality of eleventh through holes, a second water inlet groove, a diverter groove, a second labyrinth flow channel, and a second water storage tank are provided on the second bottom plate, the inlet end of the second water inlet groove is connected with the ninth through hole, the second water inlet groove is connected with the water inlet end of the diverter groove, the diverter groove is provided with a plurality of water outlet ends, each water outlet end of the diverter groove is sequentially connected with the second labyrinth flow channel and the second water storage tank, each second water storage tank is connected with a corresponding first blind hole, the first through hole, the eighth through hole, and the eleventh through hole are fixedly connected by the second bolt, and the seventh through hole and the tenth through hole are fixedly connected by the third bolt.

[0009] Furthermore, the second cover plate and the second bottom plate are both made of transparent acrylic material, and the second cover plate and the second bottom plate are bonded by a special adhesive for acrylic material.

[0010] Furthermore, a circular hole is arranged at the center of the first bracket, a magnetic stirrer is arranged at the bottom of the lower cover, and the magnetic stirrer is placed on the second bracket.

[0011] As a preferred embodiment of the present invention, the present invention provides a visualization test method for a small flow drip irrigation dripper, using the above-mentioned visualization test system for a small flow drip irrigation dripper, and the specific steps are as follows: S1: Remove the plug on the second direct connector, connect an external water pipe to the second direct connector, inject an appropriate amount of water into the water tank, disconnect the external water pipe, and install a plug on the second direct connector; S2: Close the throttle valve, adjust the pressure reducing valve to the minimum pressure, start the air pump, adjust the pressure reducing valve to the test pressure, and observe the second pressure indication until it reaches the test pressure; S3: gradually open the throttle valve, observe the first pressure indicator reading to the target pressure, and after the water flow stabilizes, collect the water outflow of the visualization device through a measuring cylinder, and calculate the average flow rate based on the time of water collection. After completion, remove the measuring cylinder; S4: Push the syringe to inject the particles in the syringe into the pipeline through the one-way valve, and at the same time record the movement of the particles in the maze flow channel of the visualization device through the camera, save and process the data results through the PC, and turn off the camera after saving; S5: After completing the test, close the throttle valve, turn off the air pump, open the air valve to release the pressure in the water tank, and open the ball valve to drain the water in the water tank.

[0012] As another preferred embodiment of the present invention, the present invention also provides a visualization test method for a small flow drip irrigation dripper, using the above-mentioned visualization test system for a small flow drip irrigation dripper, and the specific steps are as follows: S1: Remove the plug on the second direct connector, connect an external water pipe to the second direct connector, inject an appropriate amount of water into the water tank, disconnect the external water pipe, install the syringe on the second direct connector, inject a large amount of particles into the water tank, remove the syringe on the second direct connector, and install the plug; S2: Close the throttle valve, adjust the pressure reducing valve to the minimum pressure, start the air pump, adjust the pressure reducing valve to the test pressure, and observe the second pressure indication until it reaches the test pressure; S3: Turn on the magnetic stirrer and observe the mixed liquid in the water tank until the water and particles are fully mixed; S4: gradually open the throttle valve, observe the first pressure indicator reading to the target pressure, use a camera to regularly take pictures of the accumulation of particles in the labyrinth flow channel of the visualization device, save and process the data results through a PC, and turn off the camera after saving; S5: After completing the test, close the throttle valve, turn off the air pump, turn off the magnetic stirrer, open the air valve to release the pressure in the water tank, and open the ball valve to discharge the mixed liquid in the water tank.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are as follows: the visualization device used in the visualization test system for small-flow drip irrigation drippers of the present invention has a dripper flow channel structure, and the main structure has good transparency. It can simulate small-flow drip irrigation drippers while more clearly and intuitively revealing the fluid flow laws in complex boundary flow channels such as dripper flow channels, providing a basis for the design of high-performance drippers with uniform drip irrigation and high resistance to blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a visualization test system for a small-flow drip irrigation dripper according to Example 1 of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the visualization device; Figure 3 for Figure 2 Schematic diagram of the structure of the middle flange; Figure 4 for Figure 2 A schematic diagram of the structure of the first cover plate; Figure 5 for Figure 2 A schematic diagram of the structure of the first bottom plate; Figure 6 for Figure 1 Schematic diagram of the structure of the middle upper cover; Figure 7 for Figure 1 Schematic diagram of the structure of the middle cylinder; Figure 8 for Figure 1 Schematic diagram of the structure of the middle and lower cover; Fig. 9 for Figure 1 A schematic diagram of the structure of the first bracket; Fig.10 for Figure 1 A schematic diagram of the structure of the second bracket; Fig.11 A schematic structural diagram of a visualization test system for a small-flow drip irrigation dripper according to Embodiment 2 of the present invention; Fig.12 for Fig.11 A schematic diagram of the structure of the second cover plate; Fig.13 for Fig.12 A schematic diagram of the structure of the second bottom plate; Reference numerals: 1-visualization device, 101-flange, 1011-first threaded hole, 1012-first through hole, 1013-first sealing groove, 102-first cover plate, 1021-second through hole, 1022-third through hole, 1023-first blind hole, 1024-fourth through hole, 1025-second blind hole, 103-first bottom plate, 1031-fifth through hole, 1032-sixth through hole, 1033-first water storage tank, 1034-first labyrinth flow channel, 1035-first water inlet tank, 1036-first through hole, 1037-first through hole, 1038-first through hole, 1039-first through hole, 1100-first through hole, 1111-first through hole, 112-first through hole, 112-first through hole, 112-first through hole, 113 ... 04-second bolt, 105-third bolt, 106-second cover plate, 1061-seventh through hole, 1062-eighth through hole, 1063-ninth through hole, 1064-third blind hole, 1065-fourth blind hole, 107-second bottom plate, 1071-tenth through hole, 1072-eleventh through hole, 1073-second water inlet trough, 1074-diverter trough, 1075-second labyrinth flow channel, 1076-second water storage tank, 2-first direct connector, 3-first three-way connector, 4-first pressure gauge, 5 - second three-way connector, 6- one-way valve, 7- syringe, 8- throttle valve, 9- first water outlet pipe, 10- first water outlet connector, 11- air inlet pipe, 12- pressure reducing valve, 13- second direct connector, 14- plug, 15- air release valve, 16- second pressure gauge, 17- upper cover, 171- upper boss, 172- twelfth through hole, 173- second threaded hole, 174- third threaded hole, 175- fourth threaded hole, 176- fifth threaded hole, 177- second sealing groove, 18- cylinder, 19- long bolt , 20-lower cover, 201-thirteenth through hole, 202-third sealing groove, 203-first threaded blind hole, 204-fifth blind hole, 205-lower boss, 206-sixth blind hole, 207-second threaded blind hole, 21-second water outlet joint, 22-second water outlet pipe, 23-first bracket, 231-fourteenth through hole, 232-round hole, 24-ball valve, 25-second bracket, 26-air pump, 27-first bolt, 28-magnetic stirrer, 29-camera, 30-PC, 31-measuring cylinder. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only 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.

[0016] Example 1 Please see attached Figure 1-10 As shown, a small flow rate drip irrigation dripper visualization test system provided in this embodiment includes a water tank, an air pump 26, a first bracket 23, a visualization device 1, a camera 29, and a PC 30.

[0017] Specifically, the water tank includes an upper cover 17, a cylinder 18, a lower cover 20, and a long bolt 19. An upper boss 171 is arranged in the middle of the upper cover 17, and a second sealing groove 177 is arranged on the outer side of the upper boss 171. A second threaded hole 173, a third threaded hole 174, a fourth threaded hole 175, and a fifth threaded hole 176 are provided on the upper boss 171. The second threaded hole 173, the third threaded hole 174, the fourth threaded hole 175, and the fifth threaded hole 176 are respectively installed with a pressure reducing valve 12, a second direct joint 13, a venting valve 15, and a second pressure gauge 16. The second direct joint 13 is installed with a plug 14. A plurality of twelfth through holes 172 are arranged on the outer circumference of the upper cover 17. A stepped lower boss 205 is provided in the middle of the lower cover 20, a third sealing groove 202 is provided on the outer side of the lower boss 205, a fifth blind hole 204 and a sixth blind hole 206 are provided on the top surface of the lower boss 205, the fifth blind hole 204 and the sixth blind hole 206 are respectively connected with the first threaded blind hole 203 and the second threaded blind hole 207 which are provided at the same height on the outer side of the lower boss 205, the third sealing groove 202 is provided at a position higher than the first threaded blind hole 203, a thirteenth through hole 201 corresponding to the plurality of twelfth through holes 172 is provided on the outer circumferential surface of the lower cover 20, and the long bolt 19 passes through the twelfth through hole 172 and the thirteenth through hole 201 so that the upper cover 17, the cylinder 18, and the lower cover 20 are fixedly installed in sequence , sealing rings are installed in the second sealing groove 177 and the third sealing groove 202; the first water outlet joint 10 and the second water outlet joint 21 are respectively threadedly installed on the first threaded blind hole 203 and the second threaded blind hole 207, and the first water outlet joint 10 is connected to the throttle valve 8, the second three-way joint 5, the first three-way joint 3, the first direct joint 2, and the visualization device 1 in sequence through the first water outlet pipe 9, and the one-way valve 6 and the syringe 7 are installed in sequence on the other outlet of the second three-way joint 5, and the first pressure gauge 4 is installed on the other outlet of the first three-way joint 3; the second water outlet joint 21 is connected to the second water outlet pipe 22, and the second water outlet pipe 22 is provided with a ball valve 24; the air pump 26 is connected to the second water outlet pipe 22, and the ball valve 24 is provided on the second water outlet pipe 2 ... The pressure reducing valve 12 is connected through the air intake pipe 11; a plurality of fourteenth through holes 231 are provided on the first bracket 23, and the fourteenth through holes 231 are fixedly connected with the corresponding lower through holes on the lower cover 20 by a first bolt 27, so that the water tank is fixed on the first bracket 23; the visualization device 1 is used to simulate a small flow drip irrigation dripper, and its main body is made of transparent material, and a measuring cylinder 31 is arranged under the visualization device 1; the camera 29 is located behind the visualization device 1, and the camera 29 is electrically connected to the PC 30. The camera 29 is used to record the movement process of the fluid in the visualization device 1, and the PC 30 processes and analyzes the data information transmitted by the camera 29.

[0018] Specifically, the visualization device 1 includes a flange 101, a first cover plate 102, and a first bottom plate 103. A first threaded hole 1011 threadedly connected to the first direct connector 2 is arranged at the center of the flange 101. A plurality of first through holes 1012 are arranged on the outer peripheral surface of the flange 101. A plurality of second through holes 1021, a plurality of third through holes 1022, a first blind hole 1023, a fourth through hole 1024, and a second blind hole 1025 are arranged on the first cover plate 102. The outlet of the second blind hole 1025 is located directly above the measuring cylinder 31. The fourth through hole 1024 is connected to the first threaded hole 1011. A first sealing groove 101 is arranged on the disk surface of the flange 101 between the fourth through hole 1024 and the first threaded hole 1011. 013, a sealing ring is installed in the first sealing groove 1013, and a plurality of fifth through holes 1031, a plurality of sixth through holes 1032, a first water storage tank 1033, a first labyrinth flow channel 1034, and a first water inlet tank 1035 are provided on the first bottom plate 103. The inlet end of the first water inlet tank 1035 is connected with the fourth through hole 1024, and the first water inlet tank 1035, the first labyrinth flow channel 1034, the first water storage tank 1033, the first blind hole 1023, and the second blind hole 1025 are connected in sequence. The first through hole 1012, the third through hole 1022, and the sixth through hole 1032 are fixedly connected by the second bolt 104, and the second through hole 1021 and the fifth through hole 1031 are fixedly connected by the third bolt 105.

[0019] In this embodiment, the first cover plate 102 and the first bottom plate 103 are both made of transparent acrylic material, and the first cover plate 102 and the first bottom plate 103 are bonded together by a special adhesive for acrylic material.

[0020] A visualization test method for a small flow rate drip irrigation dripper provided in this embodiment has the following specific steps: S1: unplug the plug 14 on the second direct connector 13, connect an external water pipe to the second direct connector 13, inject a proper amount of water into the water tank, disconnect the external water pipe, and install the plug 14 on the second direct connector 13; S2: Close the throttle valve 8, adjust the pressure reducing valve 12 to the minimum pressure, start the air pump 26, adjust the pressure of the pressure reducing valve 12 to the test pressure, and observe the reading of the second pressure gauge 16 until it reaches the test pressure; S3: gradually open the throttle valve 8, observe the first pressure gauge 4 reading to the target pressure, and after the water flow is stable, collect the water output of the visualization device 1 through the measuring cylinder 31, and calculate the time-averaged flow rate based on the time of water collection. After completion, remove the measuring cylinder 31; S4: Push the syringe 7 to inject the particles in the syringe 7 into the pipeline through the one-way valve 6, and at the same time record the movement process of the particles in the first maze flow channel 1034 of the visualization device 1 through the camera 29, save and process the data results through the PC 30, and turn off the camera 29 after saving; S5: After the test is completed, the throttle valve 8 is closed, the air pump 26 is turned off, the air release valve 15 is opened to release the pressure in the water tank, and the ball valve 24 is opened to discharge the water in the water tank.

[0021] By adopting the system and method of this embodiment, it is possible to clearly and intuitively reveal the fluid flow pattern in the first labyrinth flow channel 1034 of the small-flow drip irrigation dripper simulated by the visualization device 1 .

[0022] Example 2 Please refer to the attached Figure 1-13 As shown, a small flow rate drip irrigation dripper visualization test system provided in this embodiment includes a water tank, an air pump 26, a first bracket 23, a visualization device 1, a camera 29, and a PC 30.

[0023] Specifically, the water tank includes an upper cover 17, a cylinder 18, a lower cover 20, and a long bolt 19. An upper boss 171 is arranged in the middle of the upper cover 17, and a second sealing groove 177 is arranged on the outer side of the upper boss 171. A second threaded hole 173, a third threaded hole 174, a fourth threaded hole 175, and a fifth threaded hole 176 are provided on the upper boss 171. The second threaded hole 173, the third threaded hole 174, the fourth threaded hole 175, and the fifth threaded hole 176 are respectively installed with a pressure reducing valve 12, a second direct joint 13, a venting valve 15, and a second pressure gauge 16. The second direct joint 13 is installed with a plug 14. A plurality of twelfth through holes 172 are arranged on the outer circumference of the upper cover 17. A stepped lower boss 205 is provided in the middle of the lower cover 20, a third sealing groove 202 is provided on the outer side of the lower boss 205, a fifth blind hole 204 and a sixth blind hole 206 are provided on the top surface of the lower boss 205, the fifth blind hole 204 and the sixth blind hole 206 are respectively connected with the first threaded blind hole 203 and the second threaded blind hole 207 which are provided at the same height on the outer side of the lower boss 205, the third sealing groove 202 is provided at a position higher than the first threaded blind hole 203, a plurality of thirteenth through holes 201 corresponding to the plurality of twelfth through holes 172 are provided on the outer circumferential surface of the lower cover 20, and the long bolt 19 passes through the twelfth through hole 172 and the thirteenth through hole 201 so that the upper cover 17, the cylinder 18 and the lower cover 20 are fixed and installed in sequence. The first threaded blind hole 203 and the second threaded blind hole 207 are respectively threaded with a first water outlet connector 10 and a second water outlet connector 21. The first water outlet connector 10 is connected to a throttle valve 8, a second three-way connector 5, a first three-way connector 3, a first direct connector 2, and a visualization device 1 in sequence through a first water outlet pipe 9. A one-way valve 6 and a syringe 7 are sequentially installed on the other outlet of the second three-way connector 5. A first pressure gauge 4 is installed on the other outlet of the first three-way connector 3. The second water outlet connector 21 is connected to a second water outlet pipe 22, and a ball valve 24 is arranged on the second water outlet pipe 22. The air pump 26 is connected to the second water outlet pipe 22. The pressure reducing valve 12 is connected through the air intake pipe 11; a plurality of fourteenth through holes 231 are provided on the first bracket 23, and the fourteenth through holes 231 are fixedly connected with the corresponding lower through holes on the lower cover 20 by a first bolt 27, so that the water tank is fixed on the first bracket 23; the visualization device 1 is used to simulate a small flow drip irrigation dripper, and its main body is made of transparent material, and a measuring cylinder 31 is arranged under the visualization device 1; the camera 29 is located behind the visualization device 1, and the camera 29 is electrically connected to the PC 30. The camera 29 is used to record the movement process of the fluid in the visualization device 1, and the PC 30 processes and analyzes the data information transmitted by the camera 29.

[0024] Specifically, the visualization device 1 includes a flange 101, a second cover plate 106, and a second bottom plate 107. A first threaded hole 1011 threadedly connected to the first direct joint 2 is arranged at the center of the flange 101. A plurality of first through holes 1012 are arranged on the outer peripheral surface of the flange 101. A plurality of seventh through holes 1061, a plurality of eighth through holes 1062, a ninth through hole 1063, a third blind hole 1064, and a fourth blind hole 1065 are arranged on the second cover plate 106. The third blind holes 1064 and the fourth blind holes 1065 are both multiple and connected one by one. A measuring cylinder 31 is placed under each fourth blind hole 1065. The eighth through hole 1062 is connected to the first threaded hole 1011. A first sealing groove 1013 is arranged on the disk surface of the flange 101 between the eighth through hole 1062 and the first threaded hole 1011. The first sealing groove 1013 is inside the first sealing groove 1013. A sealing ring is installed, and a plurality of tenth through holes 1071, a plurality of eleventh through holes 1072, a second water inlet groove 1073, a diverter groove 1074, a second labyrinth flow channel 1075, and a second water storage tank 1076 are provided on the second bottom plate 107. The inlet end of the second water inlet groove 1073 is connected to the ninth through hole 1063, and the second water inlet groove 1073 is connected to the water inlet end of the diverter groove 1074. The diverter groove 1074 is provided with a plurality of water outlet ends, and each water outlet end of the diverter groove 1074 is sequentially connected to the second labyrinth flow channel 1075 and the second water storage tank 1076, and each second water storage tank 1076 is connected to a corresponding first blind hole 1023. The first through hole 1012, the eighth through hole 1062, and the eleventh through hole 1072 are fixedly connected by the second bolt 104, and the seventh through hole 1061 and the tenth through hole 1071 are fixedly connected by the third bolt 105.

[0025] In this embodiment, the second cover plate 106 and the second bottom plate 107 are both made of transparent acrylic material, and the second cover plate 106 and the second bottom plate 107 are bonded by a special adhesive for acrylic material.

[0026] Specifically, a circular hole 232 is disposed at the center of the first bracket 23 , a magnetic stirrer 28 is disposed at the bottom of the lower cover 20 , and the magnetic stirrer 28 is placed on the second bracket 25 .

[0027] Compared with the first embodiment, the throttle valve 8 in the present embodiment can be directly connected to the first three-way connector 3, and the second three-way connector 5, the one-way valve 6 and the syringe 7 do not need to be connected therebetween.

[0028] A visualization test method for a small flow rate drip irrigation dripper provided in this embodiment has the following specific steps: S1: unplug the plug 14 on the second direct connector 13, connect an external water pipe to the second direct connector 13, inject a proper amount of water into the water tank, disconnect the external water pipe, install the syringe 7 on the second direct connector 13, inject a large amount of particles into the water tank, remove the syringe 7 on the second direct connector 13, and install the plug 14; S2: Close the throttle valve 8, adjust the pressure reducing valve 12 to the minimum pressure, start the air pump 26, adjust the pressure of the pressure reducing valve 12 to the test pressure, and observe the reading of the second pressure gauge 16 until it reaches the test pressure; S3: Turn on the magnetic stirrer 28 and observe the mixed liquid in the water tank until the water and the particles are fully mixed; S4: gradually opening the throttle valve 8, observing the first pressure gauge 4 indicating the target pressure, using the camera 29 to periodically photograph the accumulation of particles in the second labyrinth flow channel 1075 of the visualization device 1, saving and processing the data results through the PC 30, and closing the camera 29 after the saving is completed; S5: After the test is completed, the throttle valve 8 is closed, the air pump 26 is closed, the magnetic stirrer 28 is closed, the air release valve 15 is opened to release the pressure in the water tank, and the ball valve 24 is opened to discharge the mixed liquid in the water tank.

[0029] By adopting the system and method of this embodiment, the fluid flow siltation in the second labyrinth flow channel 1075 of the small flow drip irrigation dripper simulated by the visualization device 1 can be clearly and intuitively revealed. In this embodiment, the visualization device 1 can simultaneously simulate multiple small flow drip irrigation drippers with the same or different second labyrinth flow channels 1075.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the technical solution and conceptual invention of the present invention should be included in the protection scope of the present invention.

Claims

1. A visual test system for small flow drip irrigation drippers, characterized by: It includes a water tank, an air pump, a first bracket, a visualization device, a camera, and a PC; The water tank comprises an upper cover, a cylinder, a lower cover, and long bolts. An upper boss is arranged in the middle of the upper cover, a second sealing groove is arranged on the outer side of the upper boss, a second threaded hole, a third threaded hole, a fourth threaded hole, and a fifth threaded hole are arranged on the upper boss, a pressure reducing valve, a second direct joint, an air release valve, and a second pressure gauge are respectively installed at the second threaded hole, the third threaded hole, the fourth threaded hole, and the fifth threaded hole, and a plug is installed on the second direct joint. A plurality of twelfth through holes are arranged on the outer peripheral surface of the upper cover, a stepped lower boss is arranged in the middle of the lower cover, a third sealing groove is arranged on the outer side of the lower boss, a fifth blind hole and a sixth blind hole are arranged on the top surface of the lower boss, the fifth blind hole and the sixth blind hole are respectively connected with the first threaded blind hole and the second threaded blind hole arranged at the same height on the outer side of the lower boss, and the third sealing groove is arranged at a high A plurality of thirteenth through holes corresponding to the plurality of twelfth through holes are arranged on the outer circumferential surface of the lower cover in the first threaded blind hole, and the long bolts pass through the twelfth through hole and the thirteenth through hole to fix the upper cover, the cylinder body and the lower cover in sequence, and sealing rings are installed in the second sealing groove and the third sealing groove; the first threaded blind hole and the second threaded blind hole are respectively threadedly installed with a first water outlet joint and a second water outlet joint, and the first water outlet joint is connected to a throttle valve, a second three-way joint, a first three-way joint, a first direct joint and a visualization device in sequence through a first water outlet pipe, a one-way valve and a syringe are installed in sequence on the other outlet of the second three-way joint, and a first pressure gauge is installed on the other outlet of the first three-way joint; the second water outlet joint is connected to a second water outlet pipe, and a ball valve is arranged on the second water outlet pipe; The air pump is connected to the pressure reducing valve via an air inlet pipe; The first bracket is provided with a plurality of fourteenth through holes, and the fourteenth through holes are fixedly connected with the corresponding lower through holes on the lower cover by using first bolts, so that the water tank is fixed on the first bracket; The visualization device is used to simulate a small flow drip irrigation dripper, and its main body is made of transparent material. A measuring cylinder is arranged below the visualization device; The camera is located behind the visualization device and is electrically connected to the PC. The camera is used to record the movement process of the fluid in the visualization device, and the PC processes and analyzes the data information transmitted by the camera.

2. According to claim 1, a visual test system for drip irrigation drippers with a small flow rate, characterized in that: The visualization device includes a flange, a first cover plate, and a first bottom plate. A first threaded hole threadedly connected to a first direct joint is arranged at the center of the flange. A plurality of first through holes are arranged on the outer circumference of the flange. A plurality of second through holes, a plurality of third through holes, a first blind hole, a fourth through hole, and a second blind hole are arranged on the first cover plate. The outlet of the second blind hole is located directly above the measuring cylinder. The fourth through hole is communicated with the first threaded hole. A first sealing groove is arranged on the disk surface between the fourth through hole and the first threaded hole on the flange. A sealing ring is installed in the first sealing groove. A plurality of fifth through holes, a plurality of sixth through holes, a first water storage tank, a first labyrinth flow channel, and a first water inlet tank are arranged on the first bottom plate. The inlet end of the first water inlet tank is communicated with the fourth through hole. The first water inlet tank, the first labyrinth flow channel, the first water storage tank, the first blind hole, and the second blind hole are connected in sequence. The first through hole, the third through hole, and the sixth through hole are fixedly connected by a second bolt, and the second through hole and the fifth through hole are fixedly connected by a third bolt.

3. According to claim 2, a visual test system for drip irrigation drippers with a small flow rate, characterized in that: The first cover plate and the first bottom plate are both made of transparent acrylic material, and the first cover plate and the first bottom plate are bonded by a special adhesive for acrylic material.

4. According to claim 1, a visual test system for drip irrigation drippers with a small flow rate, characterized in that: The visualization device includes a flange, a second cover plate, and a second bottom plate. A first threaded hole threadedly connected to a first direct joint is arranged at the center of the flange. A plurality of first through holes are arranged on the outer circumference of the flange. A plurality of seventh through holes, a plurality of eighth through holes, a ninth through hole, a third blind hole, and a fourth blind hole are arranged on the second cover plate. The third blind holes and the fourth blind holes are both multiple and connected one by one. A measuring cylinder is placed under each fourth blind hole. The eighth through hole is connected to the first threaded hole. A first sealing groove is arranged on the disk surface between the eighth through hole and the first threaded hole on the flange. A sealing ring is installed, and a plurality of tenth through holes, a plurality of eleventh through holes, a second water inlet trough, a diverter trough, a second labyrinth flow channel, and a second water storage tank are provided on the second bottom plate. The inlet end of the second water inlet trough is connected to the ninth through hole, and the second water inlet trough is connected to the water inlet end of the diverter trough. The diverter trough is provided with a plurality of water outlet ends, and each water outlet end of the diverter trough is sequentially connected to the second labyrinth flow channel and the second water storage tank, and each second water storage tank is connected to a corresponding first blind hole. The first through hole, the eighth through hole, and the eleventh through hole are fixedly connected by the second bolt, and the seventh through hole and the tenth through hole are fixedly connected by the third bolt.

5. According to claim 4, a visual test system for drip irrigation drippers with a small flow rate, characterized in that: The second cover plate and the second bottom plate are both made of transparent acrylic material, and the second cover plate and the second bottom plate are bonded by a special adhesive for acrylic material.

6. According to claim 5, a visual test system for drip irrigation drippers with a small flow rate, characterized in that: A circular hole is arranged at the center of the first bracket, a magnetic stirrer is arranged at the bottom of the lower cover, and the magnetic stirrer is placed on the second bracket.

7. A visualization test method for a small flow drip irrigation dripper, characterized in that: The small flow rate drip irrigation dripper visualization test system according to any one of claims 1 to 5 is adopted, and the specific steps are as follows: S1: Remove the plug on the second direct connector, connect an external water pipe to the second direct connector, inject an appropriate amount of water into the water tank, disconnect the external water pipe, and install a plug on the second direct connector; S2: Close the throttle valve, adjust the pressure reducing valve to the minimum pressure, start the air pump, adjust the pressure reducing valve to the test pressure, and observe the second pressure indication until it reaches the test pressure; S3: gradually open the throttle valve, observe the first pressure indicator reading to the target pressure, and after the water flow stabilizes, collect the water outflow of the visualization device through a measuring cylinder, and calculate the average flow rate based on the time of water collection. After completion, remove the measuring cylinder; S4: Push the syringe to inject the particles in the syringe into the pipeline through the one-way valve, and at the same time record the movement of the particles in the maze flow channel of the visualization device through the camera, save and process the data results through the PC, and turn off the camera after saving; S5: After completing the test, close the throttle valve, turn off the air pump, open the air valve to release the pressure in the water tank, and open the ball valve to drain the water in the water tank.

8. A visualization test method for a small flow drip irrigation dripper, characterized in that: The small flow rate drip irrigation dripper visualization test system according to claim 6 is adopted, and the specific steps are as follows: S1: Remove the plug on the second direct connector, connect an external water pipe to the second direct connector, inject an appropriate amount of water into the water tank, disconnect the external water pipe, install the syringe on the second direct connector, inject a large amount of particles into the water tank, remove the syringe on the second direct connector, and install the plug; S2: Close the throttle valve, adjust the pressure reducing valve to the minimum pressure, start the air pump, adjust the pressure reducing valve to the test pressure, and observe the second pressure indication until it reaches the test pressure; S3: Turn on the magnetic stirrer and observe the mixed liquid in the water tank until the water and particles are fully mixed; S4: gradually open the throttle valve, observe the first pressure indicator reading to the target pressure, use a camera to regularly take pictures of the accumulation of particles in the labyrinth flow channel of the visualization device, save and process the data results through a PC, and turn off the camera after saving; S5: After completing the test, close the throttle valve, turn off the air pump, turn off the magnetic stirrer, open the air valve to release the pressure in the water tank, and open the ball valve to discharge the mixed liquid in the water tank.

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