CN215952971U - Ultra-low temperature flow control valve calibration test system for liquid rocket engine - Google Patents
Ultra-low temperature flow control valve calibration test system for liquid rocket engine Download PDFInfo
- Publication number
- CN215952971U CN215952971U CN202121864861.6U CN202121864861U CN215952971U CN 215952971 U CN215952971 U CN 215952971U CN 202121864861 U CN202121864861 U CN 202121864861U CN 215952971 U CN215952971 U CN 215952971U
- Authority
- CN
- China
- Prior art keywords
- valve
- pipeline
- control valve
- venturi
- regulating valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model provides a calibration test system for an ultralow-temperature flow regulating valve of a liquid rocket engine, which comprises: a storage tank and a calibrated venturi; wherein the tank is used for storing a cryogenic medium; the outlet of the storage tank is connected with the venturi through a first pipeline, and the first pipeline is provided with a stop valve; the venturi is connected with the flow regulating valve through a second pipeline, wherein the flow regulating valve is a tested valve; a first pressure sensor and a first temperature sensor are arranged at the inlet of the venturi and are used for measuring the pressure and the temperature at the inlet of the venturi; and a second pressure sensor is arranged on the second pipeline and used for measuring the pressure at the inlet of the flow regulating valve, and a third pressure sensor is arranged at the downstream of the flow regulating valve and used for measuring the pressure at the outlet of the flow regulating valve. The system reduces the construction cost of the calibration test system and solves the problem of poor measurement precision of the flow meter during small-flow calibration and calibration.
Description
Technical Field
The utility model relates to the field of rocket engines, in particular to a calibration test system for an ultralow-temperature flow regulating valve of a liquid rocket engine.
Background
The valve is a precise control component of a liquid rocket engine power system and is a core component for controlling the on-off of a medium required by the work of the engine. The electric control low-temperature flow regulating valve is one of core elements of the low-temperature liquid rocket engine which develops towards intellectualization and light weight.
The prior flow control valve characteristic curve ground calibration and calibration used by the low-temperature liquid rocket engine generally comprises two methods. One method is to adopt a normal temperature medium-deionized water to replace a low temperature medium for calibration and calibration, and a flowmeter is adopted to measure the medium flow in the test process. The flow regulating characteristic curve obtained by the method is often greatly deviated from the characteristic curve under the ultralow temperature real medium, and the subsequent use of the flow regulating valve is influenced. The other method is to use a low-temperature real medium for calibration and calibration, but the flow of the medium is measured by using a flowmeter in a calibration test system, so that the test process is extremely complicated and time-consuming, a large amount of low-temperature medium is consumed, and the test cost is high; when the method is used for calibrating and calibrating the small flow regulating valve, the measurement precision of the flowmeter is often large in deviation; the flow meter is expensive, which increases the construction cost of the calibration test system.
In order to ensure the accuracy of the flow regulation characteristic curve and reduce the test cost, it is important to design a system which conforms to the calibration test of the ultra-low temperature flow regulation valve of the liquid rocket engine.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a calibration test system for an ultralow-temperature flow regulating valve of a liquid rocket engine.
The utility model provides a calibration test system for an ultralow-temperature flow regulating valve of a liquid rocket engine, which comprises: a storage tank and a calibrated venturi; wherein the tank is used for storing a cryogenic medium; the outlet of the storage tank is connected with the venturi through a first pipeline, and the first pipeline is provided with a stop valve; the venturi is connected with the flow regulating valve through a second pipeline, wherein the flow regulating valve is a tested valve; a first pressure sensor and a first temperature sensor are arranged at the inlet of the venturi and are used for measuring the pressure and the temperature at the inlet of the venturi; and a second pressure sensor is arranged on the second pipeline and used for measuring the pressure at the inlet of the flow regulating valve, and a third pressure sensor is arranged at the downstream of the flow regulating valve and used for measuring the pressure at the outlet of the flow regulating valve.
According to one embodiment of the utility model, the system further comprises a first regulating valve connected downstream of the flow regulating valve by a third conduit for regulating the pressure downstream of the flow regulating valve.
According to an embodiment of the utility model, further comprising a main valve disposed on the second conduit, the main valve being located between the venturi and the second pressure sensor.
According to one embodiment of the utility model, the device further comprises a liquid filter arranged on the first conduit, the liquid filter being arranged between the outlet of the tank and the stop valve.
According to one embodiment of the utility model, the second duct is provided with a fourth duct through which the second duct communicates with the outside, the fourth duct being provided with a second regulating valve.
According to an embodiment of the utility model, the gas cylinder further comprises a gas cylinder, the gas cylinder outlet is communicated with the first pipeline through a first branch pipeline of the gas cylinder, the communication position of the first branch pipeline of the gas cylinder and the first pipeline is located between the stop valve and the venturi, and the first branch pipeline of the gas cylinder is provided with a third regulating valve.
According to an embodiment of the utility model, the tank further comprises a tank inlet for injecting a liquid or gas into the tank.
According to one embodiment of the utility model, a switch valve is provided at the tank inlet.
According to one embodiment of the utility model, the cylinder outlet communicates with the tank inlet through the second branch conduit of the cylinder and the on-off valve.
According to one embodiment of the utility model the second branch conduit of the gas cylinder is provided with a pressure regulating device, which is located between the gas cylinder outlet and the switch valve.
According to the ultra-low temperature flow regulating valve calibration test system of the liquid rocket engine, the calibrated venturi pipe replaces a traditional flowmeter to calibrate and calibrate the flow regulating valve, and the construction cost of the calibration test system is reduced. Meanwhile, the problem of poor measurement precision of the flowmeter during small-flow calibration and calibration is solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
FIG. 1 is a schematic diagram of an ultra-low temperature flow control valve calibration test system for a liquid rocket engine according to one embodiment of the present invention;
fig. 2 is a schematic diagram of the air blowing part of the ultra-low temperature flow control valve calibration test system of the liquid rocket engine according to one embodiment of the utility model.
Description of reference numerals:
12-a tank, 14-a shut-off valve,
-a first pressure sensor for measuring a pressure of the fluid,
-a first temperature sensor, 16-venturi,
a second pressure sensor, 19-a flow regulating valve (the tested valve),
-a third pressure sensor;
1-a first regulating valve;
18-a main valve;
13-a liquid filter;
2-a second regulating valve;
21-gas storage cylinder, 3-third regulating valve;
6-a switch valve;
15-pressure regulating means, PZ-four pressure sensors;
20-gas filter, 17-eleventh control valve, 5-fifth control valve, 6-sixth regulating valve, 7-seventh control valve, 4-fourth control valve, 8-eighth control valve, 9-ninth control valve, 10-tenth control valve, 11-one-way valve, PO-a fifth pressure sensor.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not to be construed as limiting the utility model, for the purposes of illustrating the principles of the utility model. Additionally, the components in the drawings are not necessarily to scale. For example, the dimensions of some of the elements or regions in the figures may be exaggerated relative to other elements or regions to help improve understanding of embodiments of the present invention.
The directional terms used in the following description are used in the illustrated directions, and do not limit the specific configurations of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise specified, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Furthermore, the terms "comprises," "comprising," "includes," "including," "has," "having" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure or component comprising a list of elements does not include only those elements but may include other mechanical components not expressly listed or inherent to such structure or component. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.
Spatially relative terms such as "below," "… below," "lower," "above," "… above," "upper," and the like are used for convenience in describing the positioning of one element relative to a second element and are intended to encompass different orientations of the device in addition to different orientations than those illustrated in the figures. Further, for example, the phrase "one element is over/under another element" may mean that the two elements are in direct contact, or that there is another element between the two elements. Furthermore, terms such as "first", "second", and the like, are also used to describe various elements, regions, sections, etc. and should not be taken as limiting. Like terms refer to like elements throughout the description.
It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
FIG. 1 is a schematic diagram of an ultra-low temperature flow control valve calibration test system for a liquid rocket engine according to one embodiment of the present invention; fig. 2 is a schematic diagram of the air blowing part of the ultra-low temperature flow control valve calibration test system of the liquid rocket engine according to one embodiment of the utility model.
As shown in FIG. 1, the utility model provides a calibration test system for an ultra-low temperature flow control valve of a liquid rocket engine, which comprises a storage tank 12 and a calibrated venturi 16; wherein the tank 12 is used for storing a cryogenic medium; the outlet of the tank 12 is connected to a venturi 16 by means of a first pipe provided with a shut-off valve 14; the venturi 16 is connected with a flow regulating valve 19 through a second pipeline, wherein the flow regulating valve 19 is a tested valve; a first pressure sensor is arranged at the inlet of the venturi 16
And a first temperature sensor
For measuring the pressure and temperature at the inlet of the venturi 16; a second pressure sensor is arranged on the second pipeline
For measuring the pressure at the inlet of the flow regulating valve 19, a third pressure sensor being arranged downstream of the flow regulating valve 19
For measuring the pressure at the outlet of the flow regulating valve 19.
At present, two methods are generally used for calibrating and calibrating the characteristic curve ground of a flow regulating valve used by a cryogenic liquid rocket engine. One method is to adopt a normal temperature medium-deionized water to replace a low temperature medium for calibration and calibration, and a flowmeter is adopted to measure the medium flow in the test process. The flow regulating characteristic curve obtained by the method is often greatly deviated from the characteristic curve under the ultralow temperature real medium, and the subsequent use of the flow regulating valve is influenced. The other method is to use a low-temperature real medium for calibration and calibration, but the flow of the medium is measured by using a flowmeter in a calibration test system, so that the test process is extremely complicated and time-consuming, a large amount of low-temperature medium is consumed, and the test cost is high; when the method is used for calibrating and calibrating the small flow regulating valve, the measurement precision of the flowmeter is often large in deviation; the flow meter is expensive, which increases the construction cost of the calibration test system.
In the embodiment, the calibrated venturi 16 is used for calibrating and calibrating the flow regulating valve instead of a traditional flowmeter, so that the construction cost of the calibration test system is reduced. Meanwhile, the problem of poor measurement precision of the flowmeter during small-flow calibration and calibration is solved.
Specifically, the cut-off valve 14 is opened, and the low-temperature medium stored in the tank 12 is discharged after passing through the cut-off valve 14, the venturi tube 16, and the flow regulating valve 19, and the calibration and calibration test of the flow regulating valve 19 are performed. The low-temperature medium passes through the first pressure sensor in the circulating process
And a first temperature sensor
Separately measuring the pressure P at the inlet of the venturi 161And temperature T1Since the venturi 16 is calibrated, the flow through the venturi can be determined, which is likewise the flow through the flow regulating valve 19. By means of a second pressure sensor
And a third pressure sensor
Measuring the pressure P at the inlet and outlet of the flow-regulating valve 19, respectively2And P3. By passingBy adjusting the opening degree of the flow rate adjustment valve 19, the pressures at the inlet and outlet of the flow rate adjustment valve 19 can be changed. By recording the opening L of the flow-regulating valve 19iInlet pressure P2And an outlet pressure P3Obtaining the opening L of the flow regulating valve 19iEquivalent flow area A thereofLiAnd finally, a characteristic curve A of the flow regulating valve 19 can be numerically fitted according to the discrete correspondenceLF (l), the calculation formula is as follows:
Qm＝f(P1，T1，φ)； ①
Qm＝μAi(2ρ(P2i-P3i))1/2wherein i is 1,2,3 …; ②
ALi＝μAi； ③
By measurement and calculation, a numerical table shown in the following table, that is, the opening degree L of the flow rate adjusting valve 19 can be obtainediEquivalent flow area A thereofLiThe discrete correspondence of (a):
finally, a regulating valve characteristic curve can be obtained through numerical fitting:
AL＝f(L)
wherein, the symbols in the formula have the following meanings:
qm-the flow (kg/s) of the cryogenic medium flowing through the flow regulating valve 19, which can be based on the venturi orifice diameter phi and the venturi front pressure P1Temperature T1Obtaining a formula I;
phi is the diameter of the venturi, m;
P1-venturi tube front medium pressure, Pa;
T1-venturi tube front medium temperature, K;
mu-flow coefficient of the regulating valve, and is dimensionless;
Airegulating valve at LiOpening degree of valve port flow area, m2；
Rho is the density of the low-temperature medium,kg/m3；
P2i-the medium pressure, Pa, before the regulating valve;
P3i-the medium pressure behind the regulating valve, Pa;
ALiregulating valve at LiEquivalent flow area of valve port under opening degree, m2。
After the calibration and calibration are finished, the stop valve 14 is closed, and the low-temperature medium in the pipeline of the test system to be calibrated is completely discharged. After the calibration test system pipeline returns to normal temperature, the flow control valve 19 can be detached from the calibration test system pipeline.
The calibrated venturi 16 is detachably connected (e.g., flanged) with the first and second pipes, and the above test process can be repeated by selecting a venturi with a suitable aperture according to the range of the flow control valve 19. The test using the low temperature medium is more accurate than the characteristic curve of the flow rate adjusting valve 19 obtained using the normal temperature medium. The venturi is lower in price, and the problems that the flowmeter is expensive, the construction cost of a calibration test system is high, and the measurement accuracy of the flowmeter is large in deviation when the small-flow regulating valve is calibrated and calibrated can be solved by replacing the venturi with a proper aperture.
As shown in FIG. 1, according to one embodiment of the present invention, a test system is calibrated, except for a tank 12, a stop valve 14, a venturi 16, a first pressure sensor
First temperature sensor
Second pressure sensor
And a third pressure sensor
Besides, the device also comprises a first regulating valve 1, wherein the first regulating valve 1 is connected with the downstream of the flow regulating valve 19 through a third pipeline and is used for regulating the flow regulationThe pressure downstream of the throttle valve 19.
In the case of high flow rates and pressure changes of the fluid, metals in contact with the fluid are susceptible to cavitation. In order to prevent the flow regulating valve 19 from being cavitated, it is necessary to secure the inlet pressure P of the flow regulating valve 192And pressure P at the outlet3The difference is within a suitable range. Before the test is started, the opening degree of the first regulating valve 1 can be regulated according to the range of the flow regulating valve 19, so that P in the subsequent test process is ensured3In a proper range, the inlet pressure P of the flow regulating valve 19 is finally ensured2And pressure P at the outlet3The difference is within a suitable range, preventing the flow rate adjustment valve 19 from being cavitated. During the test, the opening of the first regulating valve 1 can also be adjusted for adjusting the pressure P at the outlet of the flow regulating valve 193. The first regulating valve 1 may be a throttle valve.
As shown in FIG. 1, according to one embodiment of the present invention, a test system is calibrated, except for a tank 12, a stop valve 14, a venturi 16, a first pressure sensor
First temperature sensor
Second pressure sensor
And a third pressure sensor
In addition, a main valve 18 is arranged on the second pipeline, the main valve 18 is positioned on the venturi 16 and the second pressure sensor
In the meantime. In the experiment, P is not required to be read1、P2、P3、T1In this case, for example, in the process of adjusting the opening of the flow control valve 19, the low-temperature medium may not be required to flow through the flow control valve 19, and at this time, the main valve 18 may be closed first to prevent the low-temperature medium from flowing through the flow control valveThe discharge of the line from the throttle valve 19 leads to ineffective loss of cryogenic medium.
As shown in FIG. 1, according to one embodiment of the present invention, a test system is calibrated, except for a tank 12, a stop valve 14, a venturi 16, a first pressure sensor
First temperature sensor
Second pressure sensor
And a third pressure sensor
In addition, a liquid filter 13 is provided on the first conduit, between the outlet of the tank 12 and the stop valve 14. The liquid filter 13 can filter impurities in the low-temperature medium, and prevent the impurities in the low-temperature medium from blocking the pipeline. And impurities can be prevented from being retained in the flow regulating valve 19 to cause clamping stagnation, so that the subsequent use effect of the impurities in the rocket engine is influenced.
As shown in fig. 1, according to an embodiment of the present invention, the second pipeline of the calibration test system is further provided with a fourth pipeline, the second pipeline is communicated with the outside through the fourth pipeline, and the fourth pipeline is provided with a second regulating valve 2. Because the low-temperature medium is used in the test, the calibration test system can be pre-cooled before the formal start of the test in order to ensure the accuracy of the test result. Firstly, the flow regulating valve 19 is closed, and the second regulating valve 2 is opened; the shut-off valve 14 is then opened again. The cryogenic medium flows from the outlet of the tank 12 through the stop valve 14, the venturi 16 and the second regulating valve 2 and finally is discharged via the fourth conduit. During the precooling process, the temperature value T1 collected by the first temperature sensor is observed. And after T1 reaches the required value and is stable, closing the second regulating valve 2 to finish precooling. The calibration test system is precooled, and after the temperature T1 at the inlet of the venturi 16 reaches the required value and is stable, the formula is used for calculating the flow of the low-temperature medium flowing through the flow regulating valve 19, so that the test result can be more accurate, and the calibration and calibration accuracy of the flow regulating valve 19 is ensured.
As shown in FIGS. 1 and 2, according to one embodiment of the present invention, a calibration test system is provided, except for a tank 12, a shut-off valve 14, a venturi 16, a first pressure sensor
First temperature sensor
Second pressure sensor
And a third pressure sensor
Besides, the gas storage bottle 21 is also included. The outlet of the gas storage bottle 21 is communicated with the first pipeline through a first branch pipeline of the gas storage bottle 21, the communication position of the first branch pipeline of the gas storage bottle 21 and the first pipeline is positioned between the stop valve 14 and the venturi 16, and the first branch pipeline of the gas storage bottle 21 is provided with a third regulating valve 3. Because the low-temperature medium is adopted in the test, when the low-temperature medium flows through the system pipeline and the equipment, the water vapor in the pipeline is condensed after the low-temperature medium so as to clamp the equipment in the system, and in order to prevent the phenomenon, the calibration test system can be blown off and replaced by using gas (such as nitrogen) before the test formally starts. First, the shut-off valve 14 is closed, the flow control valve 19 is opened, and the flow control valve 19 is opened; the third regulating valve 3 is then opened again. The gas in the gas bomb 21 flows into the calibration test system through the first branch pipeline of the gas bomb 21, the third regulating valve 3 and finally flows through the flow regulating valve discharge pipeline. After the blowing-off and the replacement are completed, the third regulating valve 3 and the flow regulating valve 19 are closed. The gas storage bottle 21 blows gas to the pipeline of the calibration test system, so that water vapor in the system can be replaced, and the water vapor in the system is prevented from being condensed in advance by a low-temperature medium to cause equipment clamping stagnation. The gas cylinder 21 may be a high pressure gas cylinder.
In this embodiment, the tank 12 in the calibration test system includes a tank inlet in addition to a tank outlet. The tank inlet may also be provided with a switching valve 6. After the test is finished, the switch valve 6 is closed, so that the low-temperature medium in the storage tank can be prevented from flowing out from the outlet of the storage tank accidentally.
Further, the outlet of the gas cylinder 21 communicates with the inlet of the tank through a second branch conduit of the gas cylinder 21 and the on-off valve 6. The switch valve 6 is opened, the gas in the gas storage cylinder 21 enters the storage tank 12, and the storage tank 12 can be pressurized, so that the low-temperature medium in the gas storage cylinder 21 can smoothly flow out and enter a subsequent pipeline. The main pipeline of the gas storage bottle 21 can be provided with a fifth pressure sensor POFor measuring the pressure at the outlet of the gas cylinder 21.
Further, the second branch pipe of the gas cylinder 21 is provided with a pressure regulating device 15, and the pressure regulating device 15 is located between the outlet of the gas cylinder 21 and the on-off valve 6. When the pressure of the gas flowing out of the gas cylinder 21 is too high, for example, the gas cylinder 21 is a high-pressure gas cylinder, the gas flowing out of the gas cylinder 21 is firstly decompressed by the pressure regulating device 15 and then enters the storage tank 12. Not only can ensure enough pressure in the storage tank 12, but also can effectively regulate the pressure in the storage tank 12, so that the pressure in the storage tank 12 is kept stable. The pressure in the tank 12 is stabilized, so that the flow through the venturi 16 and the flow control valve 19 is stabilized, i.e. the calculation step of fitting the characteristic curve of the flow control valve 19 is reduced. A fourth pressure sensor Pz can be installed between the pressure regulating device 15 and the switch valve 6, so that whether the pressure of the gas entering the storage tank 12 is stabilized at a proper pressure value can be measured more intuitively.
Furthermore, a one-way valve 11 is arranged on a pipeline between the pressure regulating device 15 and the switch valve 6. The check valve 11 can prevent the low-temperature medium in the storage tank 12 from being reversely connected to the first branch pipeline and the second branch pipeline of the gas storage bottle 21 and the gas storage bottle 21 after being gasified, and the purpose of medium isolation is achieved.
Further, the first branch pipe of the gas cylinder 21 is provided with a fourth control valve 4, and the fourth control valve 4 is positioned between the gas cylinder 21 and the third regulating valve 3; the second branch pipe of the gas cylinder 21 is provided with a fifth control valve 5, and the fifth control valve 5 is located between the gas cylinder 21 and the pressure regulating device 15. The conduit between the non-return valve 11 and the on-off valve 6 can be disconnected and the conduit between the fourth control valve 4 and the third regulating valve 3 can be disconnected. When the gas storage bottle 21 is not required to blow gas into the storage tank 12, the fourth control valve 4 and the fifth control valve 5 can be closed, and the pipeline between the fourth control valve 4 and the third regulating valve 3 and the pipeline between the one-way valve 11 and the switch valve 6 can be disconnected, namely the system is divided into two independent systems of a blowing pressurization system and a calibration and calibration system. When the storage tank 21 is communicated with the air through the inlet and the switch valve 6, the low-temperature medium in the storage tank 12 can be ensured to smoothly flow out of the outlet of the storage tank; when the storage amount of the cryogenic medium in the tank 12 cannot meet the test requirements, the cryogenic medium can also be injected into the tank 12 through the tank inlet.
Further, the shut-off valve 14 and the main valve 18 are pneumatic control valves. The gas bomb 21 further comprises a third branch conduit, a fourth branch conduit, a fifth branch conduit and a sixth branch conduit. The third branch pipeline and the fourth branch pipeline are connected with the stop valve 14, a seventh control valve 7 and an eighth control valve 8 are respectively arranged, and the opening and the closing of the stop valve 14 are controlled by gas through the opening and the closing of the seventh control valve 7 and the eighth control valve 8; the fifth branch line and the sixth branch line are connected to the main valve 18, and a ninth control valve 9 and a tenth control valve 10 are provided, respectively, and the opening and closing of the main valve 18 are controlled by gas by the opening and closing of the ninth control valve 9 and the tenth control valve 10. Thereby achieving the purpose of remotely controlling the shut-off valve 14 and the main valve 18.
Further, the gas cylinder 21 may further include a seventh branch pipe, and the eleventh control valve 17 may be disposed on the seventh branch pipe. When the gas quantity in the gas storage cylinder 21 is insufficient, the eleventh control valve 17 can be opened, the gas storage cylinder 21 can be inflated through the eleventh control valve 17, high-pressure gas can be used, and after the inflation is finished, the eleventh control valve 17 is closed. The seventh branch pipeline can be provided with a gas filter 20, and the gas is filtered and then is filled into the gas storage bottle 17, so that the influence of impurities mixed in the gas on the sensitivity of the test equipment is prevented.
In the above embodiment of the present invention, the first regulating valve 1, the second regulating valve 2, the third regulating valve 3, the fourth control valve 4 and the fifth control valve 5 may be electric regulating valves, and automatic remote control may be achieved using the electric regulating valves. Through the remote control test system, the safety accidents such as personnel frostbite caused by low-temperature medium leakage can be effectively avoided.
The above-described embodiments of the present invention may be combined with each other with corresponding technical effects. For example, in one embodiment of the present invention, the system is purged and replaced before the test is formally started, and in this embodiment, the pre-cooling device and the pre-cooling process in another embodiment of the present invention may be included as well. At this time, before the test system is precooled, the test system is blown off and replaced, so that the water vapor in the system is prevented from condensing in the precooling process.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a liquid rocket engine ultra-low temperature flow control valve calibration test system which characterized in that includes: a storage tank and a calibrated venturi;
wherein the tank is used for storing a cryogenic medium;
the outlet of the storage tank is connected with the venturi through a first pipeline, and the first pipeline is provided with a stop valve;
the venturi is connected with the flow regulating valve through a second pipeline, wherein the flow regulating valve is a tested valve;
a first pressure sensor and a first temperature sensor are arranged at the inlet of the venturi and are used for measuring the pressure and the temperature at the inlet of the venturi;
and a second pressure sensor is arranged on the second pipeline and used for measuring the pressure at the inlet of the flow regulating valve, and a third pressure sensor is arranged at the downstream of the flow regulating valve and used for measuring the pressure at the outlet of the flow regulating valve.
2. The ultra-low temperature flow control valve calibration test system for liquid rocket engines of claim 1, further comprising a first regulating valve connected downstream of the flow control valve by a third conduit for regulating pressure downstream of the flow control valve.
3. The ultra-low temperature flow control valve calibration test system for liquid rocket engines as recited in claim 1 or 2, further comprising a main valve disposed on said second conduit, said main valve being located between said venturi and said second pressure sensor.
4. The ultra-low temperature flow control valve calibration test system for liquid rocket engines as recited in claim 1 or 2, further comprising a liquid filter disposed on said first conduit, said liquid filter disposed between said tank outlet and said shut-off valve.
5. The ultra-low temperature flow control valve calibration test system for the liquid rocket engine as claimed in claim 1 or 2, wherein the second pipeline is provided with a fourth pipeline, the second pipeline is communicated with the outside through the fourth pipeline, and the fourth pipeline is provided with a second regulating valve.
6. The system for testing calibration of ultra-low temperature flow control valve of liquid rocket engine as claimed in claim 1 or 2, further comprising an air storage cylinder, wherein the outlet of said air storage cylinder is communicated with said first pipeline through a first branch pipeline of said air storage cylinder, the communication position of said first branch pipeline of said air storage cylinder and said first pipeline is located between said stop valve and said venturi, and said first branch pipeline of said air storage cylinder is provided with a third control valve.
7. The ultra-low temperature flow control valve calibration test system for liquid rocket engines of claim 6, wherein the tank further comprises a tank inlet for injecting a liquid or gas into the tank.
8. The ultra-low temperature flow control valve calibration test system for liquid rocket engines of claim 7, wherein a switch valve is provided at the inlet of the tank.
9. The ultra-low temperature flow control valve calibration test system for liquid rocket engines of claim 8, wherein the gas cylinder outlet communicates with the tank inlet through the second branch conduit of the gas cylinder and the switch valve.
10. The system of claim 9, wherein a pressure regulator is disposed in a second branch conduit of the gas bomb, the pressure regulator being located between an outlet of the gas bomb and the switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121864861.6U CN215952971U (en) | 2021-08-11 | 2021-08-11 | Ultra-low temperature flow control valve calibration test system for liquid rocket engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121864861.6U CN215952971U (en) | 2021-08-11 | 2021-08-11 | Ultra-low temperature flow control valve calibration test system for liquid rocket engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215952971U true CN215952971U (en) | 2022-03-04 |
Family
ID=80435712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121864861.6U Active CN215952971U (en) | 2021-08-11 | 2021-08-11 | Ultra-low temperature flow control valve calibration test system for liquid rocket engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215952971U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810422A (en) * | 2022-04-11 | 2022-07-29 | 湖北航天技术研究院总体设计所 | Flow adjusting mechanism, self-adaptive adjusting device and adjusting method of attitude control system |
-
2021
- 2021-08-11 CN CN202121864861.6U patent/CN215952971U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810422A (en) * | 2022-04-11 | 2022-07-29 | 湖北航天技术研究院总体设计所 | Flow adjusting mechanism, self-adaptive adjusting device and adjusting method of attitude control system |
| CN114810422B (en) * | 2022-04-11 | 2024-06-14 | 湖北航天技术研究院总体设计所 | Flow adjusting mechanism, self-adaptive adjusting device and adjusting method of attitude control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215952971U (en) | Ultra-low temperature flow control valve calibration test system for liquid rocket engine | |
| JP2022031216A (en) | Device and method for filling liquefied gas | |
| CN109737303B (en) | Liquid oxygen system | |
| CN107830914A (en) | The micrometeor calibrating installation and method of a kind of binary channels symmetrical structure | |
| CN211853539U (en) | Metering equipment and gas distribution system | |
| CN111735520A (en) | Gas flow standard device with high-pressure and low-pressure double calibration sections and calibration method thereof | |
| CN113776817B (en) | Calibration system and method for regulating valve of ultralow-temperature liquid rocket engine | |
| CN112290062A (en) | Hydrogen safety test system of fuel cell automobile | |
| KR20190038625A (en) | Method and apparatus for detecting the amount of gas in a calibratable manner | |
| KR101445751B1 (en) | Using a cryogenic fluid heat exchanger valve leakage measuring device | |
| Büker et al. | Investigations on pressure dependence of Coriolis mass flow meters used at hydrogen refueling stations | |
| CA2383482A1 (en) | Pressure testing apparatus for gas service delivery system | |
| CN108007534B (en) | Natural gas high-flow real-flow verification system | |
| CN216524275U (en) | Mass method liquid hydrogen flow standard device driven by liquid hydrogen pump | |
| CN114427901A (en) | System and method for realizing dynamic regulation and control and calibration of temperature and pressure of gas meter | |
| CN114458477B (en) | Low-fluctuation liquid level and low-temperature on-line in-situ flow calibration method and system | |
| US4290298A (en) | System for in situ meter testing | |
| KR20090012171U (en) | Gas Pressure Measurement And Leakage Tester | |
| US20180058906A1 (en) | Flowmeter test system and flowmeter test method | |
| CN114088168B (en) | Liquid hydrogen flow standard device driven by liquid hydrogen pump and adopting mass method | |
| US20230324204A1 (en) | Portable verification system and method for use in lower pressure commercial and residential gas flow meters | |
| CN216345392U (en) | Multifunctional testing device for intelligent micro-pipe network ecological chain | |
| CN212254275U (en) | Gas flow standard device with high-low pressure double calibration sections | |
| CN111122151B (en) | Breather valve flow testing device and testing method thereof | |
| CN212568267U (en) | Gas pipeline pressure test and quick leak detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |