CN209894456U - Performance examination and test system for pressure/flow regulator for drip irrigation - Google Patents
Performance examination and test system for pressure/flow regulator for drip irrigation Download PDFInfo
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- CN209894456U CN209894456U CN201920363193.5U CN201920363193U CN209894456U CN 209894456 U CN209894456 U CN 209894456U CN 201920363193 U CN201920363193 U CN 201920363193U CN 209894456 U CN209894456 U CN 209894456U
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Abstract
The utility model discloses a performance examination and test system of a pressure/flow regulator for drip irrigation, which comprises a head system and a plurality of parallel test cells, wherein each test cell comprises a measurement unit and a flow unit; the water outlet of the header system is connected with the water inlet of the branch pipe unit, a plurality of branch pipe tee water outlets of the branch pipe unit are connected with the water inlets of the measuring units in a one-to-one correspondence mode, the measuring units are used for being matched with a pressure/flow regulator to be measured, the water outlets of the measuring units are connected with the flow unit, and the flow unit can simulate the working condition. The utility model discloses test system area is little, can simulate the multiple engineering scheme in examination field, and the representativeness is strong, has the significance to pressure flow regulator's industrial production and popularization.
Description
Technical Field
The utility model relates to a drip irrigation technical field, in particular to drip irrigation with pressure flow regulator performance examination test system.
Background
Under the condition of rugged hilly areas and long branch pipe laying conditions, the safety and irrigation uniformity of the drip irrigation system cannot be guaranteed due to elevation change and water conservancy friction loss. In order to solve the above problems, it is necessary to install a pressure regulator and a flow regulator at the capillary inlet.
Since the actual operating conditions of the pressure/flow regulators are likely to be different and there are inevitable manufacturing variations among the products, it is necessary to perform a performance pilot test of a batch product in an actual system. However, the current performance testing means of the pressure/flow regulator is mainly to perform sampling detection on a single sample of a mass-produced product, under the testing condition, a capillary tube which is not real and is connected downstream of the pressure/flow regulator ignores the linkage influence possibly caused between the pressure/flow regulators used in parallel. Therefore, it is necessary to perform a pilot test of the pressure/flow regulator in the field.
The field performance pilot test of the pressure/flow regulator is carried out in an actual field drip irrigation system, and the problems of inconvenient operation, poor representativeness and the like exist.
The performance pilot test needs to test, different pressure differences between adjacent capillary pressure/flow regulators, and the inlet and outlet pressure values and the overflow value of each capillary pressure/flow regulator under different head pressures under the condition that capillary pipes of different types and lengths are connected at the downstream of the capillary pressure/flow regulators.
In summary, the existing pressure/flow regulator test method and test system cannot replace performance pilot tests of multiple samples in the system scale, and cannot evaluate the system safety and irrigation uniformity after the pressure/flow regulator is installed in the actual drip irrigation system. And the actual irrigation system is difficult to change the arrangement mode of the pipe network easily so as to realize the performance pilot test of a plurality of samples under different working conditions.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a method for carrying out the performance evaluation of system's yardstick under different operating modes to pressure/flow regulator to corresponding easy planning arrangement is provided, and area is little but can represent the pipe network arrangement system of different actual operating mode conditions, in order to realize the performance pilot test of pressure/flow regulator under system's yardstick. The performance pilot test needs to test, different pressure differences between adjacent capillary pressure/flow regulators, and the inlet and outlet pressure values and the overflow value of each capillary pressure/flow regulator under different head pressures under the condition that capillary pipes of different types and lengths are connected at the downstream of the capillary pressure/flow regulators.
In order to achieve the above object, the utility model provides a following technical scheme:
a performance assessment and test system for a pressure/flow regulator for drip irrigation comprises: a header system, a branch pipe unit and a plurality of test cells;
each test cell comprises a measuring unit and a flow unit;
the water outlet of the header system is connected with the water inlet of the branch pipe unit, a plurality of branch pipe tee water outlets of the branch pipe unit are connected with the water inlets of the measuring units in a one-to-one correspondence mode, the measuring units are used for being matched with a pressure/flow regulator to be measured, the water outlets of the measuring units are connected with the flow unit, and the flow unit can simulate the working condition.
Preferably, the header system includes: the water tank, the water return pipe, the branch trunk pipe, the first valve and the second valve;
the water return pipe with divide the water inlet of main in all connect in the water tank, the delivery port of wet return pipe connect in the water tank, first valve set up in the wet return pipe, divide the main the delivery port connect in branch pipe unit the water inlet, the second valve set up in divide the main.
Preferably, the branch pipe unit further comprises a plurality of branch pipe tees connected in series with the water inlet, and the water outlets of the branch pipe tees are connected with the water inlet of the measuring unit;
the branch pipe unit also comprises a plurality of branch pipe valves arranged between the adjacent branch pipe tee joints.
Preferably, the measuring unit further comprises a flow meter, a pressure meter for measuring the inlet pressure of the pressure/flow regulator and a pressure gauge for measuring the outlet pressure of the pressure/flow regulator, which are sequentially connected in series between the water inlet of the measuring unit and the water outlet of the measuring unit, and the pressure meter for measuring the inlet pressure of the pressure/flow regulator and the pressure gauge for measuring the outlet pressure of the pressure/flow regulator are connected to the pressure/flow regulator to be measured.
Preferably, the flow unit comprises a flow unit water inlet, an auxiliary pipe, a ball valve and a capillary;
the inlet of the auxiliary pipe is connected to the water inlet of the flow unit, the capillary pipes are connected with the outlets of the auxiliary pipe in a one-to-one correspondence mode, and the ball valves are arranged in the capillary pipes.
Preferably, the laying lengths of the capillary pipes are consistent; or,
the laying length of each capillary gradually becomes shorter along with the distance from the head system to the head system; or,
the laying length of each capillary gradually becomes longer along with the distance from the head system to the head system.
Preferably, the flow unit comprises a capillary, a first elbow and a pressure gauge for measuring the pressure at the tail end of the capillary, the capillary is connected end to end with the first elbow, and the pressure gauge for measuring the pressure at the tail end of the capillary is connected at the tail end of the outlet of the capillary.
According to the technical scheme, the utility model provides a drip irrigation with pressure flow regulator performance examination test system has proposed for the first time and has utilized the examination method and the test system of small-size test system simulation pressure flow regulator performance in the drip irrigation system in field, and this test system test scale is little, and area is little, can simulate examination field multiple engineering scheme, and is representational strong, has important meaning to pressure flow regulator's industrial production and popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a pipe network layout mode for a pressure/flow regulator system test provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a header system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a branch pipe unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a measurement unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flow unit according to an embodiment of the present invention;
fig. 6 is a schematic view of a pipe network layout under the working condition 1 provided by the embodiment of the present invention;
fig. 7 is a schematic view of a pipe network layout of the working condition 2 provided by the embodiment of the present invention;
fig. 8 is a schematic view of a pipe network layout of a working condition 3 provided by the embodiment of the present invention;
fig. 9 is a schematic diagram of a pipe network layout of another embodiment of a pressure/flow regulator system test according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a flow unit according to another embodiment of the present invention;
wherein, 1 is a head system, 11 is a water feeding pipeline, 12 is a water tank, 13 is a ball float valve, 14 is a multistage centrifugal pump, 15 is a first valve, 16 is a second valve, 17 is a reducer union, and 18 is a water outlet;
2, a branch pipe unit, 21, 22, 23 and 24 are water inlet, branch pipe tee joint and branch pipe valve respectively;
3, a measuring unit, 31, a water inlet of the measuring unit, 32, a flowmeter, 33, 34, 35 and 36, wherein the pressure gauge is used for measuring the inlet pressure of the pressure/flow regulator, the pressure/flow regulator to be measured, the pressure gauge is used for measuring the outlet pressure of the pressure/flow regulator, and the water outlet of the measuring unit is used as the pressure gauge and the flow regulator;
4 is a flow unit, 411 is a water inlet of the flow unit, 412 is a tee joint of the flow unit, 413 is an auxiliary pipe, 414 is a plug, 415 is a ball valve, and 416 is a capillary; 421 is a water inlet of the flow unit, 422 is a bypass, 423 is a capillary, 424 is a first elbow, 425 is a second elbow, and 426 is a pressure gauge for measuring the pressure at the tail end of the capillary 423;
and 5, a test cell.
Detailed Description
In order to satisfy the above purpose, the utility model discloses take following technical scheme: the conditions of the irrigation system to which the pressure/flow regulator may be applied are classified and three typical conditions for which inspection is necessary are proposed as follows: working condition 1: when the land is rectangular, the downstream capillary of each pressure/flow regulator is paved with a drip irrigation system with basically consistent length; working condition 2: when the land is trapezoidal, the laying length of the capillary at the downstream of each pressure/flow regulator is gradually shortened along with the distance from each pressure/flow regulator to the head water source from near to far. Working condition 3: when the land is trapezoidal, the laying length of the capillary at the downstream of each pressure/flow regulator is gradually increased along with the distance from each pressure/flow regulator to the head water source from near to far. Above-mentioned three kinds of typical operating modes that detect the operating mode for must examining, in the test, can be according to actual engineering demand, through regulation and control the utility model provides a test system, the drip irrigation system that the simulation is more complicated carries out corresponding system and detects.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides a drip irrigation and use pressure/flow regulator performance examination test system, include: a header system 1, a branching unit 2 and a plurality of test cells 5;
each test cell 5 comprises a measurement unit 3 and a traffic unit 4, the structure of which can be seen in fig. 1;
wherein, the delivery port 18 of the header system 1 is connected with the water inlet 21 of the branch pipe unit 2, a plurality of branch pipe tee bend delivery ports 23 of the branch pipe unit 2 are correspondingly connected with the measuring unit water inlets 31 of a plurality of measuring units 3 one by one, the measuring units 3 are used for cooperating with the pressure/flow regulator 34 to be measured, the measuring unit delivery port 36 of the measuring unit 3 is connected with the water inlet 411 of the flow unit 4, and the flow unit 4 can simulate the working condition and comprises a capillary.
According to the technical scheme, the embodiment of the utility model provides a drip irrigation and use pressure/flow regulator performance examination test system through with the parallelly connected use of a plurality of pressure/flow regulator 34 that await measuring, can simulate the linkage influence that causes each other, has realized the performance pilot scale of a plurality of samples under the system scale.
Preferably, the header system 1 comprises: a water tank 12, a water return pipe a, a branch trunk pipe b, a first valve 15 and a second valve 16, the structure of which can be seen in fig. 2;
wherein, the water inlets of return pipe a and branch trunk b all connect in water tank 12, and the delivery port of return pipe a connects in water tank 12, and first valve 15 sets up in return pipe a, and the delivery port 18 of branch trunk b connects in branch pipe unit 2's water inlet 21, and second valve 16 sets up in branch trunk b. The pressure and flow passing through each pressure/flow regulator measuring unit 3 can be precisely regulated and controlled by jointly adjusting the opening degrees of the first valve 15 on the return pipe a and the second valve 16 on the branch pipe b.
In order to further optimize the above technical solution, the branch pipe unit 2 further includes a plurality of branch pipe tees 22 connected in series to the water inlet 21, a branch pipe tee water outlet 23 of the branch pipe tee 22 is connected to the water inlet 31 of the measuring unit, and the structure thereof can be shown in fig. 3;
the branch pipe unit 2 further comprises a plurality of branch pipe valves 24 which are arranged at the water inlet 21 and are positioned between two adjacent branch pipe tees 22. By regulating the opening degree of the branch pipe valve 24, the head loss between the branch pipe tee outlets 23 of adjacent branch pipe tee joints 22 along the water flow direction can be changed, so that the phenomenon of large pressure difference of the branch pipe outlet at different positions caused by elevation change and hydraulic friction loss in actual engineering can be simulated.
Specifically, the measurement unit 3 further includes a flow meter 32, a pressure gauge 33 for measuring the inlet pressure of the pressure/flow regulator, and a pressure gauge 35 for measuring the outlet pressure of the pressure/flow regulator, which are sequentially connected in series along the water flow direction between the water inlet 31 and the water outlet 36 of the measurement unit, and the pressure/flow regulator 34 to be measured is connected between the pressure gauge 33 for measuring the inlet pressure of the pressure/flow regulator and the pressure gauge 35 for measuring the outlet pressure of the pressure/flow regulator, and the structure of the pressure/flow regulator can be shown in fig. 4, so as to comprehensively obtain various test parameters for examination.
In the first embodiment provided by the present scheme, the flow unit 4 includes a flow water inlet 411, an auxiliary pipe 413, a ball valve 415 and a capillary 416, and the structure of the flow unit can be shown in fig. 5;
wherein, the flow unit 4 further comprises an auxiliary pipe 413, an inlet of the auxiliary pipe 413 is connected to the flow water inlet 411, a plurality of capillary tubes 416 are correspondingly connected with a plurality of outlets of the auxiliary pipe 413 one by one, and the ball valve 415 is arranged on the capillary tubes 416. The ball valve 45 can be opened or closed to control the number of the capillary tubes 46 which can distribute the flow on the auxiliary tube 43 of each flow unit 4, thereby simulating the length of the capillary tube connected at the downstream of each pressure/flow regulator sample 34 to be tested and the working conditions under different overflowing rates.
In order to further optimize the technical scheme, the flow unit 4 can simulate the working conditions including the total over-flow condition of different kinds of capillary pipes with different laying lengths. The embodiment also provides three necessary inspection typical working conditions to realize performance pilot test of a plurality of samples under different working conditions:
the laying lengths of the capillary tubes 416 are consistent, and when the corresponding land is rectangular, the structure can refer to the working condition 1 shown in fig. 6, wherein the dotted line is the field boundary line and the same below; or,
the laying length of each capillary 416 is gradually shortened from near to far from the header system 1, and when the corresponding land is in an inverted trapezoid shape, the structure can refer to the working condition 2 shown in fig. 7; or,
the laying length of each capillary 416 gradually increases from near to far from the heading system 1, and when the corresponding land is in a regular trapezoid shape, the structure thereof can refer to the working condition 3 shown in fig. 8. Of course, the above are only examples, and the present solution is not limited to this, and the lengths of the capillary tubes 416 may be arbitrarily changed according to actual requirements, so as to adjust the test system to a required working condition.
In the second embodiment provided by the present disclosure, the flow unit 4 includes capillary tubes 423, a first elbow 424, and a pressure gauge 426 for measuring pressure at the end of the capillary tubes, the capillary tubes 423 are connected end to end by the first elbow 424, and the pressure gauge 426 is connected to the outlet of the end capillary tube 423. The on-way head loss of the capillary in the flow unit can be obtained by calculating the difference between the capillary inlet pressure measured by the pressure gauge 35 in the measurement unit 3 and the capillary pressure tail end pressure measured by the pressure gauge 46, and then whether the laying length of the capillary exceeds the limit laying length can be calculated by a formula. The embodiment is suitable for the condition that the test system can occupy smaller area and the laying length of a single capillary is longer.
The present solution is further described below with reference to specific embodiments:
for realizing the capability test of a plurality of pressure/flow regulator under above-mentioned different operating mode conditions, the utility model relates to a technical scheme is arranged to simple and easy test pipe network as follows: an irrigation system pipe network arrangement structure capable of simulating multi-working-condition conditions. The method is characterized in that: the laying length of the capillary at the downstream of each pressure/flow regulator is easy to change under the limited area so as to realize the test work of the pressure/flow regulators under different over-flow conditions, and the inlet pressure of each pressure/flow regulator is easy to control so as to simulate the condition of large difference of the inlet pressure of each pressure/flow regulator caused by terrain or hydraulic friction loss in the actual engineering. The pipe network system for testing comprises 4 parts: header system 1, branch unit 2, measurement unit 3, flow unit 4.
The test system is composed of a header system 1 and several test cells 5.
The header system 1 includes a water supply pipe 11 having a ball float 13 mounted thereon and a water tank 12, wherein when the water tank 12 is not filled with water, the water supply pipe 11 continuously supplies water to the water tank 12 through the ball float 13, and when the liquid level in the water tank 12 is below the bottom of the ball float 13, the ball float 13 is closed to stop supplying water to the water tank 12. The head system 1 comprises a high-lift large-flow multistage centrifugal pump 14, a water inlet of the centrifugal pump 14 is connected with the water tank 12, a water outlet of the centrifugal pump is connected with two branch main pipes a and b through a tee joint, and the water return pipe a has a flow dividing function and leads part of water back to the water tank 12; the branch pipes b are connected to the branch pipe units 2. The water return pipe a is connected with a precise first valve 15, the branch trunk pipe b is connected with a precise second valve 16, and the pressure and the flow on each branch trunk pipe can be regulated and controlled by regulating and controlling the first valve 15 and the second valve 16. The two branch main pipes a and b are in parallel connection, and the pressure flow on one branch main pipe can be changed by adjusting a valve connected with the other branch main pipe. The pressure and flow passing through each pressure/flow regulator measuring unit 3 can be precisely regulated and controlled by jointly adjusting the opening degrees of the first valve 15 on the return pipe a and the second valve 16 on the branch pipe b. The branch pipe b is connected with the branch pipe unit through a reducing joint 17, and the water outlet 18 is connected with the water inlet 21 of the branch pipe unit 2.
The test cell 5 is composed of a part of the branch pipe unit 2 (a branch pipe tee 22, a branch pipe valve 24 and a section of connecting pipeline), a measurement unit 3 and a flow unit 4.
The branching unit 2 is connected to the header system outlet 18 via an inlet 21. The branch pipe unit 2 is composed of a series of branch pipe tee joints 22 and branch pipe valves 24 which are connected in series through pipelines. The water outlet 23 of the branch pipe tee 22 is communicated with the water inlet 31 of the measuring unit 3 of the measuring unit. By regulating the opening degree of the branch pipe valve 24, the head loss between the branch pipe tee water outlets 23 of the adjacent branch pipe tee 22 along the water flow direction can be changed. The branch tee 22 and the branch valve 24 connected in series on the branch unit 2 can be increased or decreased according to actual needs. The diameter of the branch pipe can be changed at will according to actual requirements.
The number of the measuring units 3 is the same as that of the branch tee joints 22 on the branch pipe unit 2. The water inlet 31 of the measuring unit 3 is connected with the branch pipe tee 22 and the branch pipe tee water outlet 23 on the branch pipe unit 2. The measuring unit 3 is formed by sequentially connecting a flowmeter 32, a pressure gauge 33 for measuring the inlet pressure of the pressure/flow regulator, a pressure/flow regulator 34 to be measured and a pressure gauge 35 for measuring the outlet pressure of the pressure/flow regulator in series along the water flow direction. The measuring unit water outlet 36 at the tail end of the measuring unit is connected with the flow inlet 411 of the flow unit 4. The number of the measuring units 3 can be adjusted arbitrarily according to actual requirements.
The flow inlet 411 of the flow unit 4 is connected with the water outlet 36 of the measurement unit 3 of the measurement unit. The water flow into the flow inlet 411 is distributed to two auxiliary pipes 413 connected to the flow tee 412 through the flow tee 412, and the capillary 416 is connected to the auxiliary pipes through bypass ball valves 415 inserted into the auxiliary pipes 413. The end of the auxiliary pipe 413 is connected with a plug 414 to ensure that the water flow introduced into the flow unit is completely distributed on each capillary 416. The bypass ball valve 415 can be opened or closed so as to control the number of capillaries 416 which can distribute flow on the auxiliary pipe 413 of each flow unit 4, thereby simulating the capillary length connected at the downstream of each pressure/flow regulator sample to be tested and the working conditions under different over-flow rates. The number of the flow units 4 is the same as the number of the measuring units 3. The number of the bypass ball valves 415 is consistent with that of the capillaries 416. The type, number and length of the capillary 416 connected to the auxiliary tube 413 can be adjusted arbitrarily according to actual requirements.
The test system control scheme is as follows:
in order to detect the working condition of the pressure/flow regulator in the actual engineering, the randomly sampled product needs to be installed in the test system for performance detection.
By controlling the valves 24 on the branch pipe units 2, the head loss between the branch pipe tee water outlets 23 of the adjacent branch pipe tee joints 22 along the water flow direction can be changed. Under the condition of limited branch pipe laying length, the condition that the inlet pressure difference is obvious due to the fact that the two pressure/flow regulators which are far away from each other are subjected to water head loss or height difference change along the way under the condition of long branch pipe laying in practical engineering is simulated. By opening (closing) the bypass ball valve 415, the number of capillary tubes 416 capable of distributing flow on the auxiliary tube 413 can be increased (reduced), so that the working conditions under different overflow rates can be simulated when the types and lengths of capillary tubes connected at the downstream of each pressure/flow regulator sample to be tested are different.
In summary, by jointly adjusting the opening of the branch pipe valve 24 on the branch pipe unit 2 and adjusting the number of the opened ball valves 415 on the flow unit 4, the working environment of the pressure/flow regulator connected to different positions on the branch pipe can be simulated in the land with limited area (different branch pipe laying lengths and different capillary pipe laying lengths), different land shapes of the irrigation area and different branch pipe laying terrain conditions.
The three necessary inspection typical conditions are as follows:
working condition 1: when the land is rectangular, the downstream capillary of each pressure/flow regulator is paved with a drip irrigation system with basically consistent length; working condition 2: when the land is trapezoidal, the laying length of the capillary at the downstream of each pressure/flow regulator is gradually shortened along with the distance from each pressure/flow regulator to the head water source from near to far. Working condition 3: when the land is trapezoidal, the laying length of the capillary at the downstream of each pressure/flow regulator is gradually increased along with the distance from each pressure/flow regulator to the head water source from near to far.
The detection working conditions are three typical working conditions which need to be detected, and during testing, the types, the number and the length of the capillary tubes 416 connected with the flow unit 4 can be adjusted by changing the types of the branch tubes of each branch tube unit 2 and the opening degree of the branch tube valve 24 according to actual engineering requirements, so that the number of the test units 3 and the number of the flow units 4 can be increased and reduced, and more complex drip irrigation systems (different pressure differences between adjacent capillary tube pressure/flow regulators, and the inlet and outlet pressure values and the overflow value of each capillary tube pressure/flow regulator under different head pressures under the condition that capillary tubes of different types and lengths are connected at the downstream of the capillary tube pressure/flow regulators) can be simulated.
Another embodiment of the present invention is shown in fig. 9: when the available area of test system is less, lay length for increasing single capillary, use the 180 elbows of several to establish ties with many capillaries, be used for testing the terminal pressure value of single capillary at the terminal installation manometer of capillary. The specific arrangement of the flow units in this embodiment is shown in fig. 10: the flow inlet 421 of the flow unit 4 is connected and communicated with the water outlet 36 of the measurement unit 3 of the measurement unit, the bypass 422 is connected with the water inlet 421 of the measurement unit and the capillary 423, the capillary 423 is arranged in parallel and connected through a 180-degree first elbow 424, the tail end of the capillary is connected with a pressure gauge 426 through a 90-degree second elbow 425, and the pressure gauge 426 is used for measuring the tail end pressure of the capillary. The on-way head loss of the capillary in the flow unit can be obtained by calculating the difference between the capillary inlet pressure measured by a pressure gauge 35 on the measurement unit 3 and the capillary pressure tail end pressure measured by a pressure gauge 426, and then whether the laying length of the capillary exceeds the limit laying length can be calculated by a formula. The embodiment is suitable for the condition that the test system can occupy smaller area and the laying length of a single capillary is longer.
The present solution is further described below with reference to specific embodiments:
the specific control steps of the test system are as follows:
firstly, opening the ball valves 415 on each flow unit 4 to the number required by the corresponding working condition; then regulating the branch valve 24 on the branch unit 2 to cause a significant inlet pressure difference between the adjacent pressure/flow regulators 34; the water feeding pipe 11 is opened, water is filled into the water tank 12 through the ball float valve 13, the second valve 16 is completely closed, the first valve 15 is completely opened, and the water pump 14 is started; gradually opening the second valve 16, after the capillary 416 is filled with water flow, adjusting the opening of the second valve 16 to make the inlet pressure gauge 33 in the measurement unit 3 closest to the head part be 0.02MPa or 0.05MPa (the specific numerical value is determined according to the specification and the test precision of the pressure (flow) regulator), and after the system is stable, reading the readings of the flow meter 32, the inlet pressure gauge 33 and the outlet pressure gauge 35 in each measurement unit 3; the inlet pressure of each pressure/flow regulator 34 is increased stepwise by opening the valve 16 and closing the first valve 15; before the reading of the outlet pressure gauge 35 in the measurement unit 3 closest to the head is basically stable, the valves 15 and 16 are regulated and controlled to ensure that the inlet pressure gauge 33 in the measurement unit 3 closest to the head is gradually increased by a range of 0.02MPa or 0.05MPa (the specific value is determined according to the specification and the test precision of a pressure regulator or a flow regulator), and the readings of the flow meter 32, the inlet pressure gauge 33 and the outlet pressure gauge 35 in each measurement unit 3 are read; after the reading of the outlet pressure gauge 35 in the measurement unit 3 closest to the head is basically stable, the valves 15 and 16 are regulated and controlled, so that the inlet pressure gauge 33 in the measurement unit 3 closest to the head is gradually increased to the maximum inlet pressure of the pressure/flow regulator 34 closest to the head by the pole difference of 0.05Mpa or 0.10Mpa (the specific numerical value is determined according to the specification and the test precision of the pressure regulator or the flow regulator), and the readings of the flow meter 32, the inlet pressure gauge 33 and the outlet pressure gauge 35 in each measurement unit 3 are read at each measuring point; the number of ball valves 415 on each flow cell 4 that are opened to another condition is changed and the above operation is repeated. The performance of each pressure (flow) regulator was tested under conditions 1, 2, and 3, respectively, according to the above procedure.
The size of the pipe fittings used by the branch pipe unit 2 can be selected according to the size of the pipe fittings selected by the actual irrigation system; the opening degree of the branch pipe valve 24 on the branch pipe can be regulated and controlled according to an actual pressure value measured at the head and tail ends of the branch pipe of the actual irrigation system or a theoretical pressure value calculated according to a formula; the type, number and length of the capillary 416 connected with each flow unit 4 can be changed arbitrarily according to the type and laying length of the capillary selected by the actual irrigation system, and the increase or decrease of the number of laid capillary is comprehensively considered.
The utility model discloses owing to adopt above-mentioned scheme, have following advantage: 1. the system scale performance assessment method and the test scheme of the pressure/flow regulator are provided for the first time: the test system and the test scheme are provided, and have important significance for engineering application of the pressure/flow regulator. 2. The working environment of the pressure/flow regulator under various actual working conditions is simulated by using a small-area pipe network system. Three typical working conditions represent and realize the field performance simplification examination work of the batch pressure/flow regulator. The arrangement and control scheme of the test pipe network system can be adjusted at will according to the actual working condition of the actual irrigation system and the arrangement area of the test system. 3. The test scheme is simple to operate and low in labor intensity.
To sum up, the utility model discloses a drip irrigation with pressure flow regulator performance examination test system. The test system is composed of a header system and a plurality of parallel test cells, and can be divided into the following four parts according to functions: the system comprises a header system, a branch pipe unit, a measurement unit and a flow unit. The performance assessment method comprises the following steps: install pressure/flow regulator that awaits measuring in above-mentioned test system to pressure/flow regulator performance under the multiple operating mode condition of test, wherein the utility model provides a three kinds of typical operating mode are for must examining the operating mode, and other test operating modes can be according to actual demand, through the simulation of regulation and control above-mentioned test system and test. The utility model discloses the examination method and the test system of utilizing small-size test system simulation pressure flow regulator performance in field drip irrigation system have been proposed for the first time, and this test system test scale is little, and area is little, can simulate examination field multiple engineering scheme, and the representativeness is strong, has important meaning to pressure flow regulator's industrial production and popularization.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A pressure/flow regulator performance assessment test system for drip irrigation is characterized by comprising: a header system (1), a branching unit (2) and a plurality of test cells (5);
each test cell (5) comprises a measuring unit (3) and a flow unit (4);
delivery port (18) of prelude system (1) connect in the water inlet (21) of branch pipe unit (2), a plurality of branch pipe tee bend delivery port (23) and a plurality of branch pipe unit (2) measuring unit water inlet (31) one-to-one of measuring unit (3) is connected, measuring unit (3) are used for cooperating with pressure/flow regulator (34) that await measuring, measuring unit delivery port (36) of measuring unit (3) connect in flow unit (4), flow unit (4) can the simulated condition.
2. The drip irrigation pressure/flow regulator performance assessment test system according to claim 1, characterized in that said header system (1) comprises: the water-saving device comprises a water tank (12), a water return pipe (a), a branch main pipe (b), a first valve (15) and a second valve (16);
return water pipe (a) with divide the water inlet of main (b) all connect in water tank (12), the delivery port of return water pipe (a) connect in water tank (12), first valve (15) set up in return water pipe (a), divide main (b) delivery port (18) connect in branch pipe unit (2) water inlet (21), second valve (16) set up in divide main (b).
3. The pressure/flow regulator performance assessment testing system for drip irrigation according to claim 1, wherein the branch pipe unit (2) further comprises a plurality of branch pipe tees (22) connected in series to the water inlet (21), the branch pipe tee water outlet (23) of the branch pipe tee (22) is connected with the measuring unit water inlet (31);
the branch pipe unit (2) also comprises a plurality of branch pipe valves (24) arranged between the adjacent branch pipe tee joints (22).
4. The pressure/flow regulator performance assessment and test system for drip irrigation according to claim 1, wherein the measuring unit (3) further comprises a flow meter (32), a pressure gauge (33) for measuring the inlet pressure of the pressure/flow regulator and a pressure gauge (35) for measuring the outlet pressure of the pressure/flow regulator, which are sequentially connected in series between the water inlet (31) and the water outlet (36) of the measuring unit, and the pressure gauge (33) for measuring the inlet pressure of the pressure/flow regulator and the pressure gauge (35) for measuring the outlet pressure of the pressure/flow regulator are connected with the pressure/flow regulator (34) to be measured.
5. The pressure/flow regulator performance assessment testing system for drip irrigation according to claim 1, characterized in that said flow unit (4) comprises a flow unit water inlet (411), an auxiliary pipe (413), a ball valve (415) and a capillary (416);
the inlet of the auxiliary pipe (413) is connected to the water inlet (411) of the flow unit, the plurality of capillary pipes (416) are connected with the plurality of outlets of the auxiliary pipe (413) in a one-to-one correspondence mode, and the ball valves (415) are arranged on the capillary pipes (416).
6. The drip irrigation pressure/flow regulator performance assessment test system according to claim 5, wherein the laying length of each of said capillary tubes (416) is uniform; or,
the laying length of each capillary (416) is gradually shortened along with the distance from the head system (1) to the near end; or,
the laying length of each capillary (416) is gradually increased along with the distance from the head system (1) from near to far.
7. The pressure/flow regulator performance assessment test system for drip irrigation according to claim 1, wherein the flow unit (4) comprises capillary tubes (423), a first elbow (424) and a pressure gauge (426) for measuring the pressure at the tail end of the capillary tubes, the capillary tubes (423) are connected end to end by the first elbow (424), and the pressure gauge (426) for measuring the pressure at the tail end of the capillary tubes is connected to the outlet of the capillary tubes (423) at the tail end.
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| CN201920363193.5U CN209894456U (en) | 2019-03-21 | 2019-03-21 | Performance examination and test system for pressure/flow regulator for drip irrigation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920363193.5U CN209894456U (en) | 2019-03-21 | 2019-03-21 | Performance examination and test system for pressure/flow regulator for drip irrigation |
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| CN209894456U true CN209894456U (en) | 2020-01-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109813543A (en) * | 2019-03-21 | 2019-05-28 | 中国农业大学 | A kind of trickle irrigation pressure/flow regulator Performance Assessment method and test macro |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109813543A (en) * | 2019-03-21 | 2019-05-28 | 中国农业大学 | A kind of trickle irrigation pressure/flow regulator Performance Assessment method and test macro |
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