CN108760255B - Small-flow pump valve liquid flow test bed device - Google Patents
Small-flow pump valve liquid flow test bed device Download PDFInfo
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- CN108760255B CN108760255B CN201810195846.3A CN201810195846A CN108760255B CN 108760255 B CN108760255 B CN 108760255B CN 201810195846 A CN201810195846 A CN 201810195846A CN 108760255 B CN108760255 B CN 108760255B
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Abstract
A small flow pump valve liquid flow test bed device relates to the technical field of fluid machinery test; the device comprises a test platform and a test pipeline; the test platform is of a horizontally placed mounting frame structure; the test pipeline is fixedly arranged on the test platform; the test pipeline comprises a liquid storage tank, a side test pipeline, a first layer of test pipeline, a middle layer of test pipeline, a third layer of test pipeline, a first regulating valve and a second regulating valve; wherein, the liquid storage box is a hollow barrel-shaped structure; the side wall of the lower part of the liquid storage tank is communicated with the side-mounted test pipeline, the first layer of test pipeline, the middle layer of test pipeline and the third layer of test pipeline in sequence; the three layers of test pipelines are respectively communicated with the first regulating valve and the second regulating valve in parallel and then communicated with the liquid storage tank to form a loop; the hydraulic test bench is applied to hydraulic tests of small-flow pump valve products, has the advantages of miniaturization, mobility, large measuring range and the like, and can be used for conveniently and quickly testing the small-flow pump valve products.
Description
Technical Field
The invention relates to the technical field of fluid machinery test, in particular to a small-flow pump valve fluid flow test bed device.
Background
With the development of manufacturing and processing technology, small-flow pump valve products are used in more and more industries, such as the fields of fuel cells, medicine, chemical industry and aerospace, the usage rate of the small-flow pump valve products is more and more frequent, and the hydraulic test task of the small-flow pump valve products is increased. Aiming at the defects of the prior small-flow pump valve product liquid flow test bed: the use of separate liquid flow test beds for the small flow pump and valve products; the test bed is fixed on a special test site, and occupies a larger test site area; pump valve products with different flow ranges have different liquid flow test beds corresponding to the flow of the pump valve products; the existing hydraulic test bed can only test small-flow pump valve products with the flow rate of more than 40L/h, and when the flow rate of less than 40L/h, a special test scheme or a special flow meter is adopted for testing.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the small-flow pump valve hydraulic test bed device which is applied to hydraulic tests of small-flow pump valve products, has the advantages of miniaturization, mobility, large measuring range and the like, and can be used for conveniently and quickly testing the small-flow pump valve products.
The above purpose of the invention is realized by the following technical scheme:
a small flow pump valve liquid flow test bed device comprises a test platform and a test pipeline; the test platform is of a horizontally placed mounting frame structure; the test pipeline is fixedly arranged on the test platform; the test pipeline comprises a liquid storage tank, a liquid level meter, a gas cylinder, a pressure reducing valve, a gas adding valve, a gas exhaust valve, a safety valve, a filling port flange, an exhaust valve, a storage tank pressure measuring transmitter, a side test pipeline, a first layer test pipeline, a middle layer test pipeline, a three-layer test pipeline, a first regulating valve and a second regulating valve; wherein, the liquid storage box is a hollow barrel-shaped structure; the filling port flange is fixedly arranged at the top of the liquid storage tank; the emptying valve is arranged at the bottom of the liquid storage tank; the liquid level meter is arranged on the side wall of the liquid storage tank to measure the liquid level in the liquid storage tank; the gas cylinder is connected with the pressure reducing valve, the gas filling valve and the top of the liquid storage tank in sequence; the exhaust valve and the storage tank pressure transmitter are both arranged at the top of the liquid storage tank; the safety valve is arranged on the side wall of the upper part of the liquid storage tank; the side wall of the lower part of the liquid storage tank is communicated with the side-mounted test pipeline, the first layer of test pipeline, the middle layer of test pipeline and the third layer of test pipeline in sequence; the three-layer test pipeline is communicated with the liquid storage tank to form a loop after being respectively communicated with the first regulating valve and the second regulating valve in parallel.
In the above small-flow pump valve liquid flow test bed apparatus, the test platform includes an upper, middle and lower three-layer rectangular plate-shaped structure; the three layers of rectangular plate-shaped structures are distributed at equal intervals in the vertical direction; the height of the test platform is 1400-1600 mm; each layer of rectangular plate-shaped structure is 1000mm multiplied by 700 mm; the bottom of the test platform is provided with the roller, so that the test platform can move freely.
In the small-flow pump valve liquid flow test bed device, the layer of test pipeline is fixedly arranged on the upper surface of the upper rectangular plate-shaped structure of the test platform; the middle layer test pipeline is fixedly arranged on the upper surface of a middle layer rectangular plate-shaped structure of the test platform; the three layers of test pipelines are fixedly placed on the upper surface of the lower rectangular plate-shaped structure of the test platform; the side-mounted test pipeline is fixedly arranged on the side wall of the test platform.
In the above-mentioned small flow pump valve liquid flow test bed apparatus, the side-mounted test pipeline includes an outlet ball valve, a filter, a booster pump, a second electric valve and a first electric valve; after the booster pump and the second electric valve are connected in series, a parallel pipeline is formed by the booster pump and the first electric valve; one end of the parallel pipeline is communicated with the filter, the outlet ball valve and the liquid storage tank in sequence; the other end of the parallel pipeline is communicated with a layer of test pipeline.
In the above small-flow pump valve flow test bed apparatus, the first layer of test pipeline includes a first ball valve, a temperature sensor, a second ball valve, a first differential pressure transmitter, a third ball valve, a second differential pressure transmitter, a fourth ball valve and a third differential pressure transmitter; one end of the first ball valve is communicated with the side-mounted test pipeline; the other end of the first ball valve is communicated with a temperature sensor; one end of the temperature sensor is provided with an a1 test interface; one end of the third ball valve is communicated with the middle layer test pipeline; the other end of the third ball valve is communicated with a second differential pressure transmitter; one end of the second differential pressure transmitter is provided with a c1 test interface; one end of the second ball valve is communicated with the three layers of test pipelines; the other end of the second ball valve is communicated with a first differential pressure transmitter; one end of the first differential pressure transmitter is provided with a b1 test interface; one end of the fourth ball valve is communicated with the third differential pressure transmitter; one end of the third differential pressure transmitter is provided with a c2 test interface; the other end of the fourth ball valve is communicated with the middle layer test pipeline.
In the above small-flow pump valve liquid flow test bed apparatus, the middle layer test pipeline includes a third electric valve, a first flow meter, a fourth electric valve, a second flow meter, a fifth electric valve, a third flow meter, a sixth electric valve and a fourth flow meter; the third electric valve and the first flowmeter are connected in series to form a first series circuit; the fourth electric valve is connected with the second flowmeter in series to form a second series circuit; the first series circuit and the second series circuit are connected in parallel to form a first parallel circuit; one end of the first parallel circuit is communicated with the fourth ball valve; the other end of the first parallel circuit is communicated with the three layers of test pipelines; the fifth electric valve is connected with the third flow meter in series to form a third series circuit; the sixth electric valve and the fourth flowmeter are connected in series to form a fourth series circuit; the third series circuit and the fourth series circuit are connected in parallel to form a second parallel circuit; one end of the second parallel circuit is communicated with the third ball valve; the other end of the second parallel circuit is communicated with the three-layer test pipeline.
In the above small-flow pump valve liquid flow test bed apparatus, the three-layer test pipeline includes a seventh electric valve, a fifth flow meter, an eighth electric valve, a sixth flow meter and a liquid discharge valve; the seventh electric valve, the fifth flowmeter and the first regulating valve are connected in series to form a fifth series circuit; the eighth electric valve, the sixth flow meter and the second regulating valve are connected in series to form a sixth series circuit; the fifth series circuit and the sixth series circuit are connected in parallel to form a third parallel circuit; one end of the third parallel circuit is communicated with the liquid storage tank; the other end of the third parallel circuit is respectively communicated with the liquid discharge valve, the middle layer test pipeline and the first layer test pipeline.
In the small-flow pump valve liquid flow test bed device, the test flow range of the pump valve liquid flow test bed device is 4-1200L/h.
In the small-flow pump valve liquid flow test bed device, the gas cylinder supplies gas and pressurizes the liquid storage tank through the pressure reducing valve and the gas filling valve; and the pressure in the liquid storage tank is adjusted through an exhaust valve, and the pressure adjusting range is 0.1-2.0 MPa.
Compared with the prior art, the invention has the following advantages:
(1) the invention realizes that the liquid flow tests of pump valve products are concentrated on one working platform;
(2) the working platform adopts an upper-middle-lower three-layer structure, and the bottom of the working platform is provided with a movable roller to realize a movable function;
(3) the invention enables the liquid flow test bed to measure pump valve products with large-range flow by matching the test bed mechanical circulation system with the upper computer measurement and control system, and the test flow is between 4L/h and 1200L/h.
Drawings
FIG. 1 is a schematic view of a fluid flow test bed in which the present invention is shown in a pipeline connection;
FIG. 2 is a schematic view of the test platform of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
aiming at the defects of the liquid flow test bed of the product of the current small-flow pump valve, the test bed is improved as follows: according to the hydraulic characteristics of a small-flow pump valve product, considering the similarity and the commonality of a pump valve test circulation system, the tested pump valve product shares a path of station, and the liquid flow test bed of the pump valve product is concentrated on a test platform; the flow of a pump valve product is small, the volume of a flow passage component in the test bed is small, the liquid flow test bed is designed into a movable small test platform, the length and the width of the test platform are about 1000mm multiplied by 700mm, a working platform for building the liquid flow test bed adopts an upper layer, a middle layer and a lower layer, and movable rollers are arranged at the bottom of the working platform; through the cooperation of the test bed mechanical circulation system and the upper computer measurement and control system, the liquid flow test bed can measure pump valve products with large-range flow, and the test flow is between 4L/h and 1200L/h.
A small flow pump valve liquid flow test bed device comprises a test platform 39 and a test pipeline; wherein, the test platform 39 is a horizontally arranged mounting frame structure; as shown in fig. 2, which is a schematic view of the testing platform, it can be seen that the testing platform 39 includes an upper, middle and lower three-layer rectangular plate-shaped structure; the three layers of rectangular plate-shaped structures are distributed at equal intervals in the vertical direction; the height of the test platform 39 is 1400-1600 mm; each layer of rectangular plate-shaped structure is 1000mm multiplied by 700 mm; the bottom of the test platform 39 is provided with rollers to realize the free movement of the test platform 39.
As shown in fig. 1, which is a schematic view of the connection of the liquid flow test bed pipeline, it can be seen that the test pipeline is fixedly installed on the test platform 39; the test pipeline comprises a liquid storage tank 1, a liquid level meter 2, a gas cylinder 3, a pressure reducing valve 4, a gas adding valve 5, a gas discharging valve 6, a safety valve 7, a filling port flange 8, a gas discharging valve 9, a storage tank pressure measuring transmitter 34, a side test pipeline 40, a first layer test pipeline 41, a middle layer test pipeline 42, a three-layer test pipeline 43, a first regulating valve 32 and a second regulating valve 33; wherein, the liquid storage tank 1 is a hollow barrel-shaped structure; the filling port flange 8 is fixedly arranged at the top of the liquid storage tank 1; the emptying valve 9 is arranged at the bottom of the liquid storage tank 1; the liquid level meter 2 is arranged on the side wall of the liquid storage tank 1 to measure the liquid level in the liquid storage tank 1; the gas cylinder 3 is connected with the pressure reducing valve 4, the gas adding valve 5 and the top of the liquid storage box 1 in sequence; the exhaust valve 6 and the storage tank pressure transmitter 34 are both arranged at the top of the liquid storage tank 1; the safety valve 7 is arranged on the side wall of the upper part of the liquid storage tank 1; the side wall of the lower part of the liquid storage tank 1 is sequentially communicated with a side-mounted test pipeline 40, a first layer of test pipeline 41, a middle layer of test pipeline 42 and a third layer of test pipeline 43; the three-layer testing pipeline 43 is respectively communicated with the first regulating valve 32 and the second regulating valve 33 in parallel and then communicated with the liquid storage tank 1 to form a loop. The testing flow range of the pump valve liquid flow test bed device is 4-1200L/h. The gas cylinder 3 supplies gas and pressurizes the liquid storage tank 1 through a pressure reducing valve 4 and a gas adding valve 5; and the pressure in the liquid storage tank 1 is adjusted through the exhaust valve 6, and the pressure adjusting range is 0.1-2.0 MPa.
Wherein, a layer of test pipeline 41 is fixedly arranged on the upper surface of the upper rectangular plate-shaped structure of the test platform 39; the middle layer test pipeline 42 is fixedly arranged on the upper surface of the middle layer rectangular plate-shaped structure of the test platform 39; the three-layer testing pipeline 43 is fixedly arranged on the upper surface of the lower rectangular plate-shaped structure of the testing platform 39; the side-mounted test line 40 is fixedly disposed on a side wall of the test platform 39.
The side-mounted test pipeline 40 comprises an outlet ball valve 10, a filter 11, a booster pump 12, a second electric valve 14 and a first electric valve 13; wherein, after the booster pump 12 and the second electric valve 14 are connected in series, a parallel pipeline is formed with the first electric valve 13; one end of the parallel pipeline is communicated with the filter 11, the outlet ball valve 10 and the liquid storage tank 1 in sequence; the other end of the parallel pipeline is communicated with a layer of test pipeline 41.
The first layer of test pipeline 41 comprises a first ball valve 15, a temperature sensor 35, a second ball valve 16, a first differential pressure transmitter 36, a third ball valve 17, a second differential pressure transmitter 37, a fourth ball valve 18 and a third differential pressure transmitter 38; wherein, one end of the first ball valve 15 is communicated with the side-mounted test pipeline 40; the other end of the first ball valve 15 is communicated with a temperature sensor 35; one end of the temperature sensor 35 is provided with an a1 test interface; one end of the third ball valve 17 is communicated with the middle layer test pipeline 42; the other end of the third ball valve 17 is communicated with a second differential pressure transmitter 37; one end of the second differential pressure transmitter 37 is provided with a c1 test interface; one end of the second ball valve 16 is communicated with the three-layer test pipeline 43; the other end of the second ball valve 16 is communicated with a first differential pressure transmitter 36; one end of the first differential pressure transmitter 36 is provided with a b1 test interface; one end of the fourth ball valve 18 communicates with a third differential pressure transmitter 38; one end of the third differential pressure transmitter 38 is provided with a c2 test interface; the other end of the fourth ball valve 18 communicates with an intermediate layer test line 42.
The middle layer test pipeline 42 comprises a third electric valve 20, a first flow meter 21, a fourth electric valve 22, a second flow meter 23, a fifth electric valve 24, a third flow meter 25, a sixth electric valve 26 and a fourth flow meter 27; wherein, the third electric valve 20 and the first flowmeter 21 are connected in series to form a first series circuit; the fourth electro valve 22 and the second flowmeter 23 are connected in series to form a second series circuit; the first series circuit and the second series circuit are connected in parallel to form a first parallel circuit; one end of the first parallel circuit is communicated with the fourth ball valve 18; the other end of the first parallel circuit is communicated with the three-layer test pipeline 43; the fifth electric valve 24 and the third flow meter 25 are connected in series to form a third series circuit; the sixth electro valve 26 is connected in series with a fourth flow meter 27 forming a fourth series circuit; the third series circuit and the fourth series circuit are connected in parallel to form a second parallel circuit; one end of the second parallel circuit is communicated with the third ball valve 17; the other end of the second parallel circuit communicates with a three-level test line 43.
The three-layer test line 43 comprises a seventh electric valve 28, a fifth flow meter 29, an eighth electric valve 30, a sixth flow meter 31 and a drain valve 19; wherein, the seventh electrically operated valve 28, the fifth flow meter 29 and the first regulating valve 32 are connected in series to form a fifth series circuit; the eighth electrically operated valve 30, the sixth flow meter 31 and the second regulating valve 33 are connected in series to form a sixth series circuit; the fifth series circuit and the sixth series circuit are connected in parallel to form a third parallel circuit; one end of the third parallel circuit is communicated with the liquid storage tank 1; the other end of the third parallel circuit is communicated with the drain valve 19, the middle layer test pipeline 42 and the first layer test pipeline 41 respectively.
When the tested piece is a pump, an external upper computer opens the first electric valve 13 through the control box, closes the second electric valve 14, does not work, a tested pump is connected between the port a1 and the port b1, opens the first ball valve 15 and the second ball valve 16, closes the third electric valve 20 to the sixth electric valve 26, closes the third ball valve 17 and the fourth ball valve 18, and when the test is started, the external upper computer judges the size of the test flow, if the flow is 380L/h to 1200L/h, the upper computer controls to open the seventh electric valve 28, records the data of the fifth flow meter 29, closes the parallel eighth electric valve 30 and adjusts the flow through the first adjusting valve 32; and if the testing flow rate is between 40L/h and 380L/h, the upper computer controls to open the eighth electric valve 30, record the data of the sixth flow meter 31, close the parallel seventh electric valve 28 and regulate the flow rate through the second regulating valve 33.
When the test piece is a single-inlet single-outlet valve product, the second electric valve 14 is opened, the first electric valve 13 is closed, the booster pump 12 works, and the control and connection of other pipelines are consistent with the control and connection of the test pump product. The flow regulation of the valve to be measured is carried out through the first regulating valve 32 and the second regulating valve 33, the working medium finally returns to the liquid storage tank 1, the pressure difference, namely the lift or the flow resistance, of the inlet and the outlet of the pump or the valve is measured through the first differential pressure transmitter 36, the flow-lift curve, the flow-power curve and the flow-flow resistance curve of the pump or the valve are finally measured, and the flow-efficiency curve is drawn through the detection of the control box on a circuit.
When the tested piece is a valve with a single inlet and double outlets, the upper computer opens the second electric valve 14 through the control box, closes the first electric valve 13, the booster pump 12 works, the port a1 is connected with the inlet of the tested valve, the ports c1 and c2 are respectively connected with the two outlets of the valve, opens the first ball valve 15, the third ball valve 17 and the fourth ball valve 18, and closes the second ball valve 16. For the path of connecting the port c2, if the flow rate is 380L/h to 1200L/h, the third electric valve 20 is opened and the fourth electric valve 22 is closed through the instruction of the upper computer, and the parameter of the first flow meter 21 is detected; and if the flow rate is between 40L/h and 380L/h, the fourth electric valve 22 is opened and the third electric valve 20 is closed through the instruction of the upper computer, and the parameter of the second flowmeter 23 is detected. The principle of the path for connecting the port c1 is the same as that of the path for connecting the port c 2.
And for the tested valve with total flow rate greater than 380L/h, the seventh electric valve 28 is opened, the data of the fifth flow meter 29 is recorded, the eighth electric valve 30 is opened when the total flow rate is between 40L/h and 380L/h, the data of the sixth flow meter 31 is recorded, and the parallel seventh electric valve 28 is closed.
For a single-inlet double-outlet valve, if the flow of one outlet branch of products such as a tested valve is less than 40L/h and the flow of the other outlet branch is greater than 40L/h, the flow value of the branch greater than 40L/h is tested, meanwhile, the total flow is tested, and the flow of the branch of which the tested valve is less than 40L/h can be calculated by subtracting the flow which can be monitored in the branch from the flow of the sixth flowmeter 31.
For products with the flow rate between 4L/h and 40L/h, such as a small-flow pump or a single-inlet single-outlet valve, the second electric valve 14 is opened, the first electric valve 13 is closed, and the booster pump 12 works. The port a1 is divided into two paths, one path is connected with the inlet of the product to be tested, and the other path is connected with the port c 2. The port c1 is connected with the outlet of the product to be measured, and the data of the second flowmeter 23 and the data of the sixth flowmeter 31 in the path of c2 are tested, and the data of the sixth flowmeter 31 and the data of the second flowmeter 23 are subtracted to calculate the flow rate of the product to be measured.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (9)
1. The utility model provides a small flow pump valve liquid flow test bench device which characterized in that: comprises a test platform (39) and a test pipeline; wherein, the test platform (39) is a horizontally arranged mounting frame structure; the test pipeline is fixedly arranged on the test platform (39); the testing pipeline comprises a liquid storage tank (1), a liquid level meter (2), a gas cylinder (3), a pressure reducing valve (4), a gas filling valve (5), an exhaust valve (6), a safety valve (7), a filling port flange (8), an exhaust valve (9), a storage tank pressure measuring transmitter (34), a side testing pipeline (40), a first layer testing pipeline (41), a middle layer testing pipeline (42), a three-layer testing pipeline (43), a first regulating valve (32) and a second regulating valve (33); wherein, the liquid storage box (1) is a hollow barrel-shaped structure; the filling port flange (8) is fixedly arranged at the top of the liquid storage tank (1); the emptying valve (9) is arranged at the bottom of the liquid storage tank (1); the liquid level meter (2) is arranged on the side wall of the liquid storage tank (1) to measure the liquid level in the liquid storage tank (1); the gas cylinder (3) is connected with the pressure reducing valve (4), the gas filling valve (5) and the top of the liquid storage box (1) in sequence; the exhaust valve (6) and the storage tank pressure transmitter (34) are both arranged at the top of the liquid storage tank (1); the safety valve (7) is arranged on the side wall of the upper part of the liquid storage tank (1); the side wall of the lower part of the liquid storage tank (1) is communicated with a side test pipeline (40), a first layer of test pipeline (41), a middle layer of test pipeline (42) and a third layer of test pipeline (43) in sequence; the three-layer testing pipeline (43) is respectively communicated with the first regulating valve (32) and the second regulating valve (33) in parallel and then communicated with the liquid storage tank (1) to form a loop.
2. A small flow pump valve fluid test stand apparatus as defined in claim 1, wherein: the test platform (39) comprises an upper layer rectangular plate-shaped structure, a middle layer rectangular plate-shaped structure and a lower layer rectangular plate-shaped structure; the three layers of rectangular plate-shaped structures are distributed at equal intervals in the vertical direction; the height of the test platform (39) is 1400-1600 mm; each layer of rectangular plate-shaped structure is 1000mm multiplied by 700 mm; the bottom of the test platform (39) is provided with rollers, so that the test platform (39) can move freely.
3. A small flow pump valve fluid test stand apparatus as defined in claim 2, wherein: the layer of test pipeline (41) is fixedly placed on the upper surface of the upper rectangular plate-shaped structure of the test platform (39); the middle layer test pipeline (42) is fixedly arranged on the upper surface of the middle layer rectangular plate-shaped structure of the test platform (39); the three layers of test pipelines (43) are fixedly placed on the upper surface of the lower layer rectangular plate-shaped structure of the test platform (39); the side-mounted test pipeline (40) is fixedly arranged on the side wall of the test platform (39).
4. A small flow pump valve flow test stand apparatus as defined in claim 3, wherein: the side-mounted testing pipeline (40) comprises an outlet ball valve (10), a filter (11), a booster pump (12), a second electric valve (14) and a first electric valve (13); wherein, after the booster pump (12) and the second electric valve (14) are connected in series, a parallel pipeline is formed with the first electric valve (13); one end of the parallel pipeline is communicated with the filter (11), the outlet ball valve (10) and the liquid storage tank (1) in sequence; the other end of the parallel pipeline is communicated with a layer of test pipeline (41).
5. The small flow pump valve fluid test stand apparatus of claim 4, wherein: the first layer of test pipeline (41) comprises a first ball valve (15), a temperature sensor (35), a second ball valve (16), a first differential pressure transmitter (36), a third ball valve (17), a second differential pressure transmitter (37), a fourth ball valve (18) and a third differential pressure transmitter (38); wherein, one end of the first ball valve (15) is communicated with the side-mounted test pipeline (40); the other end of the first ball valve (15) is communicated with a temperature sensor (35); one end of the temperature sensor (35) is provided with an a1 test interface; one end of the third ball valve (17) is communicated with the middle layer test pipeline (42); the other end of the third ball valve (17) is communicated with a second differential pressure transmitter (37); one end of the second differential pressure transmitter (37) is provided with a c1 test interface; one end of the second ball valve (16) is communicated with the three-layer testing pipeline (43); the other end of the second ball valve (16) is communicated with a first differential pressure transmitter (36); one end of the first differential pressure transmitter (36) is provided with a b1 test interface; one end of the fourth ball valve (18) is communicated with the third differential pressure transmitter (38); one end of the third differential pressure transmitter (38) is provided with a c2 test interface; the other end of the fourth ball valve (18) is communicated with the middle layer test pipeline (42).
6. The small flow pump valve fluid test stand apparatus of claim 5, wherein: the middle layer test pipeline (42) comprises a third electric valve (20), a first flow meter (21), a fourth electric valve (22), a second flow meter (23), a fifth electric valve (24), a third flow meter (25), a sixth electric valve (26) and a fourth flow meter (27); wherein the third electric valve (20) and the first flowmeter (21) are connected in series to form a first series circuit; the fourth electric valve (22) and the second flowmeter (23) are connected in series to form a second series circuit; the first series circuit and the second series circuit are connected in parallel to form a first parallel circuit; one end of the first parallel circuit is communicated with a fourth ball valve (18); the other end of the first parallel circuit is communicated with a three-layer test pipeline (43); the fifth electric valve (24) and the third flow meter (25) are connected in series to form a third series circuit; the sixth electric valve (26) and the fourth flowmeter (27) are connected in series to form a fourth series circuit; the third series circuit and the fourth series circuit are connected in parallel to form a second parallel circuit; one end of the second parallel circuit is communicated with a third ball valve (17); the other end of the second parallel circuit is communicated with a three-layer test pipeline (43).
7. A small flow pump valve fluid test stand apparatus as defined in claim 6, wherein: the three-layer testing pipeline (43) comprises a seventh electric valve (28), a fifth flow meter (29), an eighth electric valve (30), a sixth flow meter (31) and a drain valve (19); the seventh electric valve (28), the fifth flow meter (29) and the first regulating valve (32) are connected in series to form a fifth series circuit; the eighth electric valve (30), the sixth flow meter (31) and the second regulating valve (33) are connected in series to form a sixth series circuit; the fifth series circuit and the sixth series circuit are connected in parallel to form a third parallel circuit; one end of the third parallel circuit is communicated with the liquid storage tank (1); the other end of the third parallel circuit is respectively communicated with the drain valve (19), the middle layer test pipeline (42) and the first layer test pipeline (41).
8. A small flow pump valve flow test stand apparatus as claimed in any one of claims 1 to 7, wherein: the testing flow range of the pump valve liquid flow test bed device is 4-1200L/h.
9. A small flow pump valve fluid test stand apparatus as defined in claim 8, wherein: the gas cylinder (3) is used for supplementing gas and pressurizing the liquid storage tank (1) through a reducing valve (4) and a gas adding valve (5); and the pressure in the liquid storage tank (1) is adjusted through the exhaust valve (6), and the pressure adjusting range is 0.1-2.0 MPa.
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| CN110595783B (en) * | 2019-08-20 | 2021-04-16 | 蓝箭航天技术有限公司 | Pump pressure type liquid flow test system |
| CN111174823A (en) * | 2019-12-27 | 2020-05-19 | 青岛博纳德机械科技有限公司 | A factory test platform for dosing device and using method |
| CN113310660B (en) * | 2021-05-31 | 2023-04-07 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Automatic flow resistance control system for minimum flow |
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