CN220726611U - Gas-liquid two-phase centrifugal pump external characteristic and internal flow test system - Google Patents
Gas-liquid two-phase centrifugal pump external characteristic and internal flow test system Download PDFInfo
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- CN220726611U CN220726611U CN202420337419.5U CN202420337419U CN220726611U CN 220726611 U CN220726611 U CN 220726611U CN 202420337419 U CN202420337419 U CN 202420337419U CN 220726611 U CN220726611 U CN 220726611U
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- 239000007788 liquid Substances 0.000 title claims abstract description 184
- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The application discloses an external characteristic and internal flow test system of a gas-liquid two-phase centrifugal pump, which comprises a gas circuit system, a liquid circuit system, a gas-liquid mixed transportation system, a liquid storage tank and an air compressor; the gas-liquid mixing and conveying system comprises a gas-liquid mixer and a test centrifugal pump; the output end of the gas-liquid mixer is communicated with the input end of the test centrifugal pump, and the output end of the test centrifugal pump is communicated with the inlet of the liquid storage tank; the input end of the liquid path system is communicated with the outlet of the liquid storage tank; the output end of the liquid path system is communicated with the first input end of the gas-liquid mixer; the input end of the air circuit system is communicated with the air compressor, and the output end of the air circuit system is communicated with the second input end of the air-liquid mixer. The method solves the problem that the working condition parameters of the gas-liquid two-phase medium cannot be simulated for the centrifugal pump test system in the prior art, and can verify the capacity of the test centrifugal pump for conveying the gas-liquid two-phase medium and judge whether the external characteristics of the gas-liquid two-phase centrifugal pump can meet the working requirements of the test centrifugal pump.
Description
Technical Field
The application relates to the technical field of centrifugal pump test systems, in particular to a gas-liquid two-phase centrifugal pump external characteristic and internal flow test system.
Background
Centrifugal pumps are widely used as general machines, and the internal medium flow rule is quite complex due to the complex structure. As the working environment, operating conditions and the delivery medium change, the performance of the centrifugal pump will also change. According to different states of the conveying medium, the working state of the centrifugal pump can be divided into single phase, gas-liquid two phases, solid-liquid two phases and gas-solid-liquid three phases. In actual production, the working state of the centrifugal pump is not unchanged in a certain state, and it is necessary to study the performance of the centrifugal pump under multiphase working conditions. At present, most of centrifugal pump test systems can only carry out single-phase centrifugal pump tests, but cannot meet the test requirement of conveying gas-liquid two-phase media in a controllable state, and a set of centrifugal pump test system capable of conveying gas-liquid two-phase media is urgently needed.
Disclosure of Invention
According to the embodiment of the application, the problem that the centrifugal pump test system cannot simulate the working condition parameters of the gas-liquid two-phase medium in the prior art is solved by providing the gas-liquid two-phase centrifugal pump external characteristic and internal flow test system.
The embodiment of the utility model provides an external characteristic and internal flow test system of a gas-liquid two-phase centrifugal pump, which comprises a gas circuit system, a liquid circuit system, a gas-liquid mixed transportation system, a liquid storage tank and an air compressor; the gas-liquid mixing and conveying system comprises a gas-liquid mixer and a test centrifugal pump; the output end of the gas-liquid mixer is communicated with the input end of the test centrifugal pump, and the output end of the test centrifugal pump is communicated with the inlet of the liquid storage tank; the input end of the liquid path system is communicated with the outlet of the liquid storage tank; the output end of the liquid path system is communicated with the first input end of the gas-liquid mixer; the input end of the air circuit system is communicated with the air compressor, and the output end of the air circuit system is communicated with the second input end of the air-liquid mixer.
In one possible implementation, the gas circuit system includes a gas storage tank, a primary filter, a cold dryer, a secondary filter, and a gas bypass; the two ends of the cold dryer are respectively connected with a primary filter and a secondary filter, and the output end of the air storage tank is communicated with the input end of the primary filter; the input end of the air storage tank is communicated with the air compressor; the output end of the secondary filter is communicated with the input end of the gas branch; the output end of the gas branch is communicated with the second input end of the gas-liquid mixer.
In one possible implementation, the gas circuit system further includes a second valve and a gas bypass; the air storage tank is respectively communicated with the air compressor and the input end of the primary filter through the second valve; the input end of the primary filter is also communicated with the air compressor through the gas bypass; the gas bypass is provided with a second valve.
In one possible implementation, the gas branch includes a first branch and a second branch; the first branch is connected in parallel with the second branch, and the input end of the first branch, the input end of the second branch and the output end of the secondary filter are all communicated; the output end of the first branch and the output end of the second branch are communicated with the second input end of the gas-liquid mixer.
In one possible implementation, the first branch and the second branch each include a first valve, a gas flow meter, a first regulating valve, and a check valve; the first valve, the gas flowmeter, the first regulating valve and the check valve are sequentially connected in series between the output end of the secondary filter and the second input end of the gas-liquid mixer.
In one possible implementation, the gas-liquid mixing system further includes a third regulating valve and a second liquid flow meter; the third regulating valve and the second liquid flowmeter are sequentially connected in series between the output end of the test centrifugal pump and the inlet of the liquid storage tank.
In one possible implementation, the fluid path system includes a multi-stage pump; and two ends of the multistage pump are respectively communicated with the outlet of the liquid storage tank and the first input end of the gas-liquid mixer.
In one possible implementation, the fluid path system further comprises a first ball valve, a second ball valve, a first fluid flow meter, a check valve, and a second regulator valve; the first ball valve, the multistage pump, the second ball valve, the first liquid flowmeter, the check valve and the second regulating valve are sequentially connected in series between the outlet of the liquid storage tank and the first input end of the gas-liquid mixer along the liquid flowing direction.
In one possible implementation, the gas circuit system further includes a third ball valve; the third ball valves are respectively arranged at two sides of the gas branch, and can exhaust the gas circuit system after the test is finished.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
the embodiment of the utility model adopts a gas circuit system, a liquid circuit system, a gas-liquid mixing and conveying system, a liquid storage tank and an air compressor, wherein the gas-liquid mixing and conveying system comprises a gas-liquid mixer and a test centrifugal pump, the output end of the gas-liquid mixer is communicated with the input end of the test centrifugal pump, the output ends of the liquid circuit system and the gas circuit system are both communicated with the gas-liquid mixer, the input end of the liquid circuit system is communicated with the outlet of the liquid storage tank, and liquid medium can be provided for the gas-liquid mixing and conveying system through the liquid circuit system; the input end of the gas circuit system is communicated with the air compressor, and gas medium can be provided for the gas-liquid mixed transmission system through the gas circuit system; the gas-liquid mixer can make gaseous medium and liquid medium after mixing evenly get into experimental centrifugal pump and test, and experimental centrifugal pump's output is linked together with the entry of liquid storage pot, and experimental centrifugal pump can carry gaseous liquid two-phase medium to circulate in the liquid storage pot and test, and this application has solved among the prior art to the unable problem of simulating gaseous liquid two-phase medium operating mode parameter of centrifugal pump test system, can verify experimental centrifugal pump's ability of carrying gaseous liquid two-phase medium to judge whether the outer characteristic of gaseous liquid two-phase centrifugal pump can satisfy experimental centrifugal pump's operational requirement.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments of the present utility model will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an external characteristic and internal flow test system of a gas-liquid two-phase centrifugal pump according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an air path system according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a gas-liquid mixing and conveying system according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a liquid path system according to an embodiment of the present application.
Icon: 1-an air path system; 11-an air storage tank; 12-stage filter; 13-a cold dryer; 14-a two-stage filter; 15-gas bypass; 16-gas branch; 161-first valve; 162-gas flow meter; 163-a first regulating valve; 164-check valve; 17-a third ball valve; 2-a gas-liquid mixing and conveying system; 21-a gas-liquid mixer; 22-test centrifugal pump; 23-a third regulating valve; 24-a second liquid flow meter; 25-transparent pipeline; 3-a liquid path system; 31-a first ball valve; 32-a multistage pump; 33-a first liquid flow meter; 34-check valve; 35-a second regulating valve; 36-a second ball valve; 4-a liquid storage tank; 5-air compressor.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
The embodiment of the utility model provides a gas-liquid two-phase centrifugal pump external characteristic and internal flow test system, which comprises a gas circuit system 1, a liquid circuit system 3, a gas-liquid mixed transportation system 2, a liquid storage tank 4 and an air compressor 5; the gas-liquid mixing and conveying system 2 comprises a gas-liquid mixer 21 and a test centrifugal pump 22; the output end of the gas-liquid mixer 21 is communicated with the input end of the test centrifugal pump 22, and the output end of the test centrifugal pump 22 is communicated with the inlet of the liquid storage tank 4; the input end of the liquid path system 3 is communicated with the outlet of the liquid storage tank 4; the output end of the liquid path system 3 is communicated with the first input end of the gas-liquid mixer 21; the input end of the air path system 1 is communicated with the air compressor 5, and the output end of the air path system 1 is communicated with the second input end of the air-liquid mixer 21.
As shown in fig. 1 and 3, the output end of the liquid path system 3 and the output end of the air path system 1 are respectively communicated with a first input end and a second input end of the gas-liquid mixer 21, the input end of the liquid path system 3 is communicated with the outlet of the liquid storage tank 4, and the liquid medium in the liquid storage tank 4 can be conveyed into the gas-liquid mixer 21 through the liquid path system 3; the input end of the gas circuit system 1 is communicated with the air compressor 5, a gas medium can be conveyed into the gas-liquid mixer 21 through the gas circuit system 1, the output end of the gas-liquid mixer 21 is communicated with the inlet of the liquid storage tank 4, and the gas-liquid mixer 21 can uniformly mix a liquid medium and the gas medium and then is led into the test centrifugal pump 22 for test.
Illustratively, the input end and the output end of the test centrifugal pump 22 are respectively provided with a transparent glass pipeline, and a worker can observe the gas-liquid mixing state of the inlet and the outlet of the test centrifugal pump 22 through the transparent glass pipelines.
Illustratively, as shown in fig. 1, an output end of the test centrifugal pump 22 is communicated with an inlet of the liquid storage tank 4, the test centrifugal pump 22 can convey a gas-liquid two-phase medium into the liquid storage tank 4, wherein the liquid storage tank 4 is communicated with the atmosphere, and can automatically discharge the gas medium in the gas-liquid two-phase medium, and the liquid medium is stored into the liquid storage tank 4 for recycling.
In this embodiment, as shown in fig. 2, the air path system 1 includes an air storage tank 11, a primary filter 12, a cold dryer 13, a secondary filter 14, and an air branch 16; the two ends of the cold dryer 13 are respectively connected with a primary filter 12 and a secondary filter 14, and the output end of the air storage tank 11 is communicated with the input end of the primary filter 12; the input end of the air storage tank 11 is communicated with the air compressor 5; the output end of the secondary filter 14 is communicated with the input end of the gas branch 16; the output of the gas branch 16 communicates with a second input of the gas-liquid mixer 21.
In this embodiment of the application, the export of air compressor machine 5 is provided with the muffler, and air compressor machine 5 can eliminate the noise that produces in the gas medium compression process through the muffler after exporting the pressurized gas medium.
The input end of the air storage tank 11 is communicated with the air compressor 5, the air storage tank 11 can stabilize the pressure of the pressurized air medium output by the air compressor 5, the pressure of the air medium input into the gas-liquid mixed transportation system 2 is ensured to be stable, and the condition of fluctuation of the pressure of the air medium is avoided.
Illustratively, the primary filter 12 and the secondary filter 14 are capable of filtering the gaseous medium, and the intercooler 13 in the embodiment of the present application is capable of cooling and drying the compressed gaseous medium, reducing the temperature of the gaseous medium, and eliminating the moisture of the gaseous medium, because the temperature of the gaseous medium increases after compression.
In this embodiment, as shown in fig. 2, the gas path system 1 further includes a second valve and a gas bypass 15; the air storage tank 11 is respectively communicated with the air compressor 5 and the input end of the primary filter 12 through a second valve; the input end of the primary filter 12 is also communicated with the air compressor 5 through a gas bypass 15; a second valve is provided in the gas bypass 15.
The first-stage filter 12 can be communicated with the air compressor 5 through the air storage tank 11 or the air bypass 15, and the second valves are arranged on the front and rear positions of the air storage tank 11 and the air bypass 15, when the air storage tank 11 needs to be overhauled, the second valves arranged on the air bypass 15 are opened, and meanwhile, the second valves arranged on the front and rear positions of the air storage tank 11 are closed.
In the embodiment of the present application, as shown in fig. 2, the gas branch 16 includes a first branch and a second branch; the first branch is connected in parallel with the second branch, and the input end of the first branch, the input end of the second branch and the output end of the secondary filter 14 are all communicated; the output end of the first branch and the output end of the second branch are communicated with the second input end of the gas-liquid mixer 21.
Illustratively, the gas branch 16 includes a first branch and a second branch, the first branch and the second branch are connected in parallel, and an output end of the secondary filter 14 is communicated with a second input end of the gas-liquid mixer 21 through the first branch or the second branch, and a worker can select the first branch or the second branch to convey the gas medium according to the gas volume.
In this embodiment, as shown in fig. 2, the first branch and the second branch each include a first valve 161, a gas flow meter 162, a first regulating valve 163, and a check valve 164; a first valve 161, a gas flow meter 162, a first regulating valve 163 and a non-return valve 164 are connected in series in this order between the output of the secondary filter 14 and the second input of the gas-liquid mixer 21.
Illustratively, the first branch includes a first valve 161, a gas flow meter 162, a first regulator valve 163, and a check valve 164; the first valve 161, the gas flow meter 162, the first regulating valve 163 and the check valve 164 are sequentially connected in series; the second branch is provided with the same components as the first branch, and the specifications and the types of the same components of the first branch and the second branch are different; the input end of the first valve 161 of the first branch and the output end of the second branch are communicated with the output end of the secondary filter 14; the output ends of the check valves 164 of the first and second branches are both in communication with the second input end of the gas-liquid mixer 21.
Illustratively, the first valve 161 of the first branch controls the opening and closing of the first branch channel, the gas flow meter 162 can monitor the gas amount of the gas medium, the first regulating valve 163 can regulate the pressure and the gas amount of the gas medium, and the check valve 164 can prevent the liquid medium from entering the gas circuit system 1, so as to avoid damaging the instrument of the gas circuit system 1. The second branch is the same.
In the embodiment of the present application, as shown in fig. 3, the gas-liquid mixing and conveying system 2 further includes a third adjusting valve 23 and a second liquid flowmeter 24; a third regulating valve 23 and a second liquid flow meter 24 are connected in series in sequence between the output of the test centrifugal pump 22 and the inlet of the reservoir 4.
Illustratively, the third regulator valve 23 is capable of regulating the flow rate of the test centrifugal pump 22, and the second liquid flow meter 24 is capable of monitoring the magnitude of the flow rate of the liquid medium output by the test centrifugal pump 22.
In the embodiment of the present application, as shown in fig. 4, the liquid path system 3 includes a multistage pump 32; both ends of the multistage pump 32 are respectively communicated with the outlet of the liquid storage tank 4 and the first input end of the gas-liquid mixer 21.
Illustratively, the two ends of the multistage pump 32 are respectively connected to the outlet of the liquid reservoir 4 and the first input of the gas-liquid mixer 21, and the multistage pump 32 is capable of increasing the inlet pressure of the test centrifugal pump 22 and is capable of being used for forced circulation of the whole test system.
In the embodiment of the present application, as shown in fig. 4, the liquid path system 3 further includes a first ball valve 31, a second ball valve 36, a first liquid flow meter 33, a check valve 34, and a second regulating valve 35; the first ball valve 31, the multistage pump 32, the second ball valve 36, the first liquid flow meter 33, the check valve 34, and the second regulating valve 35 are sequentially connected in series in the liquid flow direction between the outlet of the liquid tank 4 and the first input end of the gas-liquid mixer 21.
Illustratively, the first ball valve 31 and the second ball valve 36 can control the opening and closing of the liquid path system 3, the first liquid flowmeter 33 can monitor the flow rate of the liquid medium flowing out of the liquid path system 3, the second regulating valve 35 can regulate the flow rate of the liquid medium, and the check valve 34 can prevent the liquid medium from flowing back, so that damage to the instrument of the liquid path system 3 is avoided.
In this embodiment, as shown in fig. 2, the air path system 1 further includes a third ball valve 17; the third ball valves 17 are respectively arranged at two sides of the gas branch 16, and can perform exhaust treatment on the gas path system 1 after the test is finished.
Illustratively, after the test is completed, the third ball valve 17 is capable of performing an exhaust treatment on the gas circuit system 1 to avoid the presence of gaseous medium in the pipeline.
In this specification, each embodiment is described in a progressive manner, and the same or similar parts of each embodiment are referred to each other, and each embodiment is mainly described as a difference from other embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions.
Claims (9)
1. The external characteristic and internal flow test system of the gas-liquid two-phase centrifugal pump is characterized by comprising a gas circuit system (1), a liquid circuit system (3), a gas-liquid mixed delivery system (2), a liquid storage tank (4) and an air compressor (5);
the gas-liquid mixing and conveying system (2) comprises a gas-liquid mixer (21) and a test centrifugal pump (22);
the output end of the gas-liquid mixer (21) is communicated with the input end of the test centrifugal pump (22), and the output end of the test centrifugal pump (22) is communicated with the inlet of the liquid storage tank (4);
the input end of the liquid path system (3) is communicated with the outlet of the liquid storage tank (4); the output end of the liquid path system (3) is communicated with the first input end of the gas-liquid mixer (21);
the input end of the air path system (1) is communicated with the air compressor (5), and the output end of the air path system (1) is communicated with the second input end of the air-liquid mixer (21).
2. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 1, wherein the gas path system (1) comprises a gas storage tank (11), a primary filter (12), a cold dryer (13), a secondary filter (14) and a gas branch (16);
two ends of the cold dryer (13) are respectively connected with a primary filter (12) and a secondary filter (14), and the output end of the air storage tank (11) is communicated with the input end of the primary filter (12); the input end of the air storage tank (11) is communicated with the air compressor (5); the output end of the secondary filter (14) is communicated with the input end of the gas branch (16); the output end of the gas branch (16) is communicated with the second input end of the gas-liquid mixer (21).
3. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 2, wherein the gas circuit system (1) further comprises a second valve and a gas bypass (15);
the air storage tank (11) is respectively communicated with the air compressor (5) and the input end of the primary filter (12) through the second valve; the input end of the primary filter (12) is also communicated with the air compressor (5) through the air bypass (15); the gas bypass (15) is provided with a second valve.
4. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 2, wherein the gas branch (16) comprises a first branch and a second branch;
the first branch is connected in parallel with the second branch, and the input end of the first branch, the input end of the second branch and the output end of the secondary filter (14) are all communicated;
the output end of the first branch and the output end of the second branch are communicated with the second input end of the gas-liquid mixer (21).
5. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 4, wherein the first and second branches each comprise a first valve (161), a gas flow meter (162), a first regulating valve (163) and a check valve (164);
the first valve (161), the gas flowmeter (162), the first regulating valve (163) and the check valve (164) are sequentially connected in series between the output end of the secondary filter (14) and the second input end of the gas-liquid mixer (21).
6. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 1, wherein the gas-liquid mixing system (2) further comprises a third regulating valve (23) and a second liquid flowmeter (24);
the third regulating valve (23) and the second liquid flowmeter (24) are sequentially connected in series between the output end of the test centrifugal pump (22) and the inlet of the liquid storage tank (4).
7. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 1, wherein the liquid path system (3) comprises a multistage pump (32);
and two ends of the multistage pump (32) are respectively communicated with the outlet of the liquid storage tank (4) and the first input end of the gas-liquid mixer (21).
8. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 7, wherein the liquid path system (3) further comprises a first ball valve (31), a second ball valve (36), a first liquid flow meter (33), a check valve (34) and a second regulating valve (35);
the first ball valve (31), the multi-stage pump (32), the second ball valve (36), the first liquid flowmeter (33), the check valve (34) and the second regulating valve (35) are sequentially connected in series between the outlet of the liquid storage tank (4) and the first input end of the gas-liquid mixer (21) along the liquid flowing direction.
9. The gas-liquid two-phase centrifugal pump external characteristic and internal flow test system according to claim 2, wherein the gas circuit system (1) further comprises a third ball valve (17); the third ball valves (17) are respectively arranged on two sides of the gas branch (16), and can exhaust the gas circuit system (1) after the test is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420337419.5U CN220726611U (en) | 2024-02-23 | 2024-02-23 | Gas-liquid two-phase centrifugal pump external characteristic and internal flow test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420337419.5U CN220726611U (en) | 2024-02-23 | 2024-02-23 | Gas-liquid two-phase centrifugal pump external characteristic and internal flow test system |
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| CN220726611U true CN220726611U (en) | 2024-04-05 |
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| CN202420337419.5U Active CN220726611U (en) | 2024-02-23 | 2024-02-23 | Gas-liquid two-phase centrifugal pump external characteristic and internal flow test system |
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| CN (1) | CN220726611U (en) |
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