CN219474949U - Valve low temperature test system - Google Patents

Valve low temperature test system Download PDF

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Publication number
CN219474949U
CN219474949U CN202121112889.4U CN202121112889U CN219474949U CN 219474949 U CN219474949 U CN 219474949U CN 202121112889 U CN202121112889 U CN 202121112889U CN 219474949 U CN219474949 U CN 219474949U
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China
Prior art keywords
valve
nitrogen
low
temperature
liquid nitrogen
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CN202121112889.4U
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Inventor
郑国真
张小平
姜圣杰
杨军
李勇
张宏伟
张士强
周小义
任荣波
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Lanjian Spaceflight Technology Co ltd
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Lanjian Spaceflight Technology Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

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  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The utility model provides a valve low-temperature test system, which comprises: the low-temperature working container is used for storing liquid nitrogen and compressed nitrogen and is connected with the tested valve through a pipeline so as to perform pressure test on the tested valve; the liquid nitrogen spraying system is used for spraying and cooling the tested valve; the liquid nitrogen supply system outputs liquid nitrogen to the low-temperature working container and the liquid nitrogen spraying system; and the nitrogen pressurizing system outputs compressed nitrogen to the low-temperature working container. The test system can simulate the low-temperature environment of the tested valve in the rocket flight process, and has the function of adjusting the size of the air pillow.

Description

Valve low temperature test system
Technical Field
The utility model relates to the field of valve tests, in particular to a valve low-temperature test system.
Background
With the rapid development of the aerospace field, the market demand for rockets is rising year by year. In low temperature liquid rockets, such as liquid oxygen methane rockets, in order to ensure the performance of the valves in the rockets, low temperature performance tests of the valves are required. In the prior art, a normal temperature performance test is generally adopted for a valve in a rocket, and a test system does not have the function of adjusting the size of an air pillow, namely the size of a low-temperature working container.
In view of the foregoing, there is a need for a valve low-temperature test system capable of performing a low-temperature environment test and having a size adjusting function of an air cushion, i.e., a low-temperature working container.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a valve low-temperature test system.
The utility model provides a valve low-temperature test system, which comprises: the low-temperature working container is used for storing liquid nitrogen and compressed nitrogen and is connected with the tested valve through a pipeline so as to perform pressure test on the tested valve; the liquid nitrogen spraying system is used for spraying and cooling the tested valve; the liquid nitrogen supply system outputs liquid nitrogen to the low-temperature working container and the liquid nitrogen spraying system; and the nitrogen pressurizing system outputs compressed nitrogen to the low-temperature working container.
According to one embodiment of the utility model, the valve cryoprotection system further comprises: the nitrogen self-pressurization system is connected between the upper end and the lower end of the low-temperature working container and is used for pressurizing the low-temperature working container through liquid nitrogen vaporization.
According to one embodiment of the utility model, the valve cryoprotection system further comprises: and the test station is connected to the upper end of the low-temperature working container and is used for setting a tested valve.
According to one embodiment of the utility model, a liquid level meter, a first pressure sensor and a first temperature sensor are arranged on the low-temperature working container.
According to one embodiment of the utility model, a first exhaust pipeline is arranged at the upper end of the low-temperature working container, and the first exhaust pipeline is provided with an exhaust pneumatic ball valve, an exhaust stop valve, a second pressure sensor and a safety valve.
According to one embodiment of the utility model, a first filter and a liquid nitrogen filling pneumatic ball valve are arranged on a pipeline of the liquid nitrogen supply system.
According to one embodiment of the utility model, a nitrogen inlet stop valve, a second filter, a pressure reducing valve, a pressure increasing stop valve and a pressure increasing pneumatic ball valve are sequentially arranged on a pipeline from an inlet to an outlet of the nitrogen pressurization system.
According to one embodiment of the utility model, a self-pressurization pneumatic regulating valve, a vaporizer, a third pressure sensor and a self-pressurization pneumatic ball valve are sequentially arranged on a pipeline of the nitrogen self-pressurization system from a lower end outlet to an upper end inlet of the low-temperature working container.
According to one embodiment of the utility model, a second temperature sensor and a fourth pressure sensor are arranged on the carburetor, a second exhaust pipeline is additionally arranged at the outlet of the carburetor, and a self-pressurizing exhaust pneumatic ball valve is arranged on the second exhaust pipeline and is used for exhausting nitrogen.
According to one embodiment of the utility model, a test stop valve, a mass flowmeter, a third temperature sensor and a fifth pressure sensor are arranged on a pipeline of the test station, and a fourth temperature sensor is arranged on a tested valve.
The valve low-temperature test system is built through test environments of the low-temperature working container, the liquid nitrogen spraying system, the liquid nitrogen supply system and the nitrogen pressurizing system, can meet the use environment of a tested valve in the rocket flight process, and therefore performs low-temperature environment test and has the function of adjusting the size of an air cushion.
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 scope 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 a valve cold test system according to one embodiment of the present utility model;
FIG. 2 is a schematic diagram of a valve cold test system according to another embodiment of the present utility model;
FIG. 3 is a schematic diagram of a valve cold test system according to yet another embodiment of the present utility model.
Reference numerals:
100-low temperature working container, 101-liquid level meter, 102-first pressure sensor, 103-first temperature sensor, 104-first exhaust pipeline, 105-exhaust pneumatic ball valve, 106-exhaust stop valve, 107-second pressure sensor, 108-relief valve, 200-liquid nitrogen spraying system, 201-spraying pneumatic ball valve, 202-liquid nitrogen spraying device, 300-nitrogen pressurization system, 301-nitrogen intake stop valve, 302-second filter, 303-depressurization valve, 304-pressurization stop valve, 305-pressurization pneumatic ball valve, 400-liquid nitrogen supply system, 401-first filter, 402-liquid nitrogen filling start ball valve, 500-nitrogen self-pressurization system, 501-self-pressurization pneumatic adjusting valve, 502-vaporizer, 503-third pressure sensor, 504-self-pressurization pneumatic ball valve, 506-second temperature sensor, 507-fourth pressure sensor, 508-second exhaust pipeline, 509-self-pressurization exhaust pneumatic ball valve, 600-test station, 601-test stop valve, 602-mass flowmeter, 603-third temperature sensor, 604-fifth pressure sensor 605-fourth temperature sensor.
Detailed Description
Features and exemplary embodiments of various aspects of the present utility model will be described in detail below, and in order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the principles of the present utility model and not in limitation thereof. In addition, the mechanical components in the drawings are not necessarily to scale. For example, the dimensions of some of the structures or regions in the figures may be exaggerated relative to other structures or regions to help facilitate an understanding of embodiments of the present utility model.
The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the embodiment of the present utility model. In the description of the present utility model, it should be noted that, unless otherwise indicated, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.
Furthermore, the terms "comprises," "comprising," "includes," "including," "having," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure or assembly that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, assembly. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in an article or apparatus that comprises the element.
Spatially relative terms such as "under", "below", "under …", "low", "above", "over …", "high", and the like, are used for convenience of description to explain the positioning of one element relative to a second element and to represent different orientations of the device in addition to those shown in the figures. In addition, for example, "one element above/below another element" may mean that two elements are in direct contact, or that other elements are present 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 utility model 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 utility model by showing examples of the utility model.
FIG. 1 is a schematic diagram of a valve cold test system according to one embodiment of the present utility model; FIG. 2 is a schematic diagram of a valve cold test system according to another embodiment of the present utility model; FIG. 3 is a schematic diagram of a valve cold test system according to yet another embodiment of the present utility model.
As shown in fig. 1, the present utility model provides a valve cold test system, comprising: the low-temperature working container 100 is used for storing liquid nitrogen and compressed nitrogen and is connected with a tested valve through a pipeline so as to perform pressure test on the tested valve; the liquid nitrogen spraying system 200 is used for spraying and cooling the tested valve; a liquid nitrogen supply system 400 for outputting liquid nitrogen to the cryogenic working vessel 100 and the liquid nitrogen spraying system 200; the nitrogen pressurization system 300 outputs compressed nitrogen to the cryogenic working vessel 100.
Specifically, the low-temperature working container 100 is a vacuum insulation type storage tank, can conveniently store liquid nitrogen and store the liquid nitrogen for a long time, and reduces the filling frequency of the liquid nitrogen. The cryogenic working vessel 100 is connected to the valve under test through a pipeline, and the compressed nitrogen of the cryogenic working vessel 100 is pressurized to the valve under test through the nitrogen pressurization system 300, so that the pressure test of the valve under test is performed.
Before the pressure test of the tested valve is carried out, in order to simulate the working environment of the tested valve, the tested valve needs to be sprayed and cooled through the liquid nitrogen spraying system 200, the temperature of the actual working environment of the tested valve is reached, and the safety problem can be avoided when the tested valve is effectively cooled in a spraying mode. Compared with the test mode of quickly mounting the valve to be tested to the working container after soaking the valve by liquid nitrogen, the liquid nitrogen spraying mode is safer, and the risk of low-temperature burn of test personnel in the mounting process is avoided.
The liquid nitrogen required by the liquid nitrogen spraying system 200 is supplied by a liquid nitrogen supply system 400, and the liquid nitrogen output by the liquid nitrogen supply system 400 is supplied to the cryogenic working vessel 100 in addition to the liquid nitrogen spraying system 200, for adjusting the volume of the air pillow in the cryogenic working vessel 100. The volume of the air pillow is changed by filling liquid nitrogen with different volumes, and the volume of the air pillow of the rocket tank under different liquid levels is simulated. The nitrogen in the pressurizing system can be cooled through the liquid nitrogen in the low-temperature working container 100, so that the medium passing through the tested valve is also low-temperature and the temperature range is controllable, and the temperature of the gas medium of the tested valve in the actual use process is reduced.
The valve low-temperature test system in the embodiment can simulate factors such as low temperature and volume of a rocket valve in the actual use process, and has the performances of adjustable air pillow volume, adjustable test medium temperature, controllable valve body temperature of the tested valve and the like aiming at tested valves of different types, so that the use environment of the tested valve in the rocket flight process is better reduced.
As shown in fig. 2, according to an embodiment of the present utility model, the valve cryoprotection system further comprises: the nitrogen self-pressurization system 500 is connected between the upper end and the lower end of the low-temperature working container 100, and pressurizes the low-temperature working container 100 through liquid nitrogen vaporization.
Specifically, the liquid nitrogen self-pressurization system slowly pressurizes the low-temperature working container 100, the liquid nitrogen in the working container is vaporized into low-temperature nitrogen, the liquid nitrogen is positioned at the lower end of the low-temperature working container 100, and the nitrogen is positioned at the upper end of the low-temperature working container 100, so that the nitrogen self-pressurization system 500 is connected between the upper end and the lower end of the low-temperature working container 100 to pressurize the low-temperature working container 100, the utilization rate of liquid nitrogen resources can be increased, and the cost of a single test is reduced. The nitrogen in the system can be cooled through the liquid nitrogen of the low-temperature working container 100, so that the nitrogen medium passing through the tested valve is also low-temperature and the temperature range is controllable, and the temperature of the nitrogen medium of the tested valve in the actual use process is reduced.
According to one embodiment of the utility model, the valve cryoprotection system further comprises: the test station 600 is connected to the upper end of the cryogenic working vessel 100 for setting a valve under test.
Specifically, the test station 600 is used for setting a valve to be tested, and the test station 600 can receive liquid nitrogen spraying of the liquid nitrogen spraying system 200 and also can receive input of compressed nitrogen with corresponding pressure in the low-temperature working container 100, so as to meet the test requirements of valve temperature and pressure.
As shown in fig. 3, according to an embodiment of the present utility model, a level gauge 101, a first pressure sensor 102, and a first temperature sensor 103 are provided on a cryogenic working vessel 100.
Specifically, the liquid level meter 101 arranged on the low-temperature working container 100 can select the differential pressure liquid level meter 101, and has a remote transmission function, when liquid nitrogen is filled into the low-temperature working container 100, the liquid nitrogen filling amount can be displayed through the liquid level meter 101, and the volume of the filled liquid nitrogen is adjusted according to the size of the air cushion required in the actual use process of the valve. The first pressure sensor 102 provided on the cryogenic working vessel 100 may display the pressure of the cryogenic working vessel 100 in situ, and the first temperature sensor 103 may be capable of monitoring the temperature within the storage tank of the cryogenic working vessel 100.
According to one embodiment of the utility model, a first exhaust pipeline 104 is arranged at the upper end of the low-temperature working container 100, and the first exhaust pipeline 104 is provided with an exhaust pneumatic ball valve 105, an exhaust stop valve 106, a second pressure sensor 107 and a safety valve 108.
Specifically, in order to ensure the safety of the cryogenic working container 100 and personnel, the upper end of the cryogenic working container 100 is provided with a first exhaust pipeline 104, and an exhaust pneumatic ball valve 105 and an exhaust stop valve 106 arranged on the first exhaust pipeline 104 provide nitrogen gas discharge in a remote control mode and a manual on-site control mode, so that the pressure of the cryogenic working container 100 is reduced. The second pressure sensor 107 is used for monitoring the gas pressure of the first exhaust pipeline 104, and the safety valve 108 is used for guaranteeing that the pressure of the low-temperature working container 100 can be rapidly released when the system fault leads to the overpressure of the storage tank, so that the safety of the low-temperature working container 100 and personnel is guaranteed.
According to one embodiment of the utility model, a first filter 401 and a liquid nitrogen filling pneumatic ball valve 402 are provided on the piping of the liquid nitrogen supply system 400.
Specifically, the first filter 401 matched with the filling pipeline corresponding to the liquid nitrogen supply system 400 filters the liquid nitrogen to remove impurities. The liquid nitrogen filling pneumatic ball valve 402 is opened to fill liquid nitrogen into the pipeline of the liquid nitrogen supply system 400, and after the liquid nitrogen is filtered by the first filter 401, the liquid nitrogen is filled into the low-temperature working container 100.
According to one embodiment of the present utility model, a nitrogen intake shutoff valve 301, a second filter 302, a pressure reducing valve 303, a pressure increasing shutoff valve 304 and a pressure increasing pneumatic ball valve 305 are sequentially disposed on a line from an inlet to an outlet of the nitrogen increasing system 300.
Specifically, the nitrogen gas intake shutoff valve 301 is opened, and compressed nitrogen gas is filtered by the second filter 302 and then enters the pressure reducing valve 303. The pressure gauge can be arranged at the inlet of the pressure reducing valve 303 to display the pressure value before the pressure reducing valve 303, and the pressure is regulated by the pressure reducing valve 303 to output the reduced pressure and then compress nitrogen. The outlet of the pressure reducing valve 303 may be provided with a pressure gauge to display the nitrogen pressure value at the outlet of the pressure reducing valve 303. The boost shut-off valve 304 and the boost pneumatic ball valve 305 control the boost of the cryogenic working vessel 100 in series by remote control and in-situ manual control.
According to one embodiment of the present utility model, a self-pressurization pneumatic control valve 501, a vaporizer 502, a third pressure sensor 503 and a self-pressurization pneumatic ball valve 504 are sequentially arranged on a pipeline of the nitrogen self-pressurization system 500 from a lower end outlet to an upper end inlet of the cryogenic working container 100.
Specifically, the self-pressurization rate is controlled by changing the opening size of the self-pressurization pneumatic regulating valve 501 in the self-pressurization system, and the self-pressurization speed is controlled by regulating and controlling the flow of liquid nitrogen. The vaporizer 502 is used for heating and vaporizing the passing liquid nitrogen, the third pressure sensor 503 is used for measuring the pressure of a pipeline behind the vaporizer 502, and the switch of the nitrogen self-pressurization system 500 is controlled through the self-pressurization pneumatic ball valve 504, so as to control whether the cryogenic working container 100 is continuously pressurized.
According to one embodiment of the utility model, a second temperature sensor 506 and a fourth pressure sensor 507 are arranged on the vaporizer 502, a second exhaust pipeline 508 is additionally arranged at the outlet of the vaporizer 502, and the second exhaust pipeline 508 is provided with a self-pressurizing exhaust pneumatic ball valve 509 for exhausting nitrogen.
Specifically, a second temperature sensor 506 and a fourth pressure sensor 507 on vaporizer 502 are used to measure the temperature and pressure within vaporizer 502. Meanwhile, in order to prevent the residual liquid nitrogen in the pipeline from vaporizing to cause the pipeline to be overpressurized, a second exhaust pipeline 508 is additionally arranged at the outlet of the vaporizer 502, and a self-pressurizing exhaust pneumatic ball valve 509 on the second exhaust pipeline 508 is used for discharging the nitrogen in the self-pressurizing pipeline.
According to one embodiment of the utility model, a test shut-off valve 601, a mass flowmeter 602, a third temperature sensor 603 and a fifth pressure sensor 604 are arranged on a pipeline of the test station 600, and a fourth temperature sensor 605 is arranged on the tested valve.
Specifically, by opening and closing the stop valve on the pipeline of the test station 600, the valve to be tested is convenient to mount and dismount, and the test personnel is prevented from being burnt by low temperature in the process of replacing the valve to be tested. The fifth pressure sensor 604 is used to measure the start and shut-off pressure of the valve under test before its inlet. The third temperature sensor 603 before the inlet of the valve under test is used to measure the temperature of the nitrogen passing through the valve under test. The mass flow meter 602 on the line of the test station 600 is used to measure the actual displacement of the valve under test. The fourth temperature sensor 605 is arranged on the shell of the tested valve and is used for measuring the temperature of the shell of the tested valve, and when the temperature of the valve body reaches the test requirement, the low-temperature performance test is carried out.
The liquid nitrogen spraying system 200 comprises a spraying pneumatic ball valve 201 and a liquid nitrogen spraying device 202. The spraying pneumatic ball valve 201 controls the opening and closing of spraying, and the liquid nitrogen spraying device 202 is used for uniformly spraying liquid nitrogen on the tested valve.
The utility model also provides a valve low-temperature test method, which comprises the following steps:
s1, outputting liquid nitrogen to the lower end of a low-temperature working container 100 by a liquid nitrogen supply system 400, and stopping filling until the liquid nitrogen filling amount meets the requirement of the air pillow volume;
s2, outputting liquid nitrogen to the liquid nitrogen spraying system 200 by the liquid nitrogen supply system 400, spraying and cooling the tested valve, and monitoring that the temperature of the tested valve reaches a preset temperature;
s3, closing the liquid nitrogen spraying system 200 and opening the nitrogen pressurizing system 300 to output compressed nitrogen to the lower end of the low-temperature working container 100;
s4, outputting pressurized nitrogen to the tested valve at the upper end of the low-temperature working container 100 until the pressure reaches the opening pressure point of the tested valve;
s5, adjusting the pressure reducing valve 303 in the nitrogen pressurization system 300 until the exhaust amount of the tested valve reaches the preset exhaust amount.
Some of the steps S1-S5 described above may be interchanged and still fall within the scope of the present application, and it is obvious that by limiting the explanation of S1-S5, it is not reasonable to adjust some of the steps to a degree that does not fall within the scope of the present application.
Specifically, the valve low-temperature test in this embodiment is mainly a valve low-temperature rated exhaust gas test, and the preparation work before the start of the test method includes powering on the system, checking each process system and measurement and control element, and installing each system and connecting the pipelines after the checking is completed, which is not described in detail herein.
In step S1 of the valve low temperature test method, the low temperature working container 100 needs to be opened to the test stop valve 601 of the tested valve, and meanwhile, the liquid nitrogen supply system 400 outputs liquid nitrogen to the lower end of the low temperature working container 100, and the filling is stopped until the filling amount of liquid nitrogen meets the requirement of the air pillow volume, so that the filling can be performed according to the requirement of the air pillow volume required in the test task book.
In step S2, the liquid nitrogen supply system 400 outputs liquid nitrogen to the liquid nitrogen spraying system 200, opens the spraying pneumatic ball valve 201 of the liquid nitrogen spraying system 200, sprays and cools the tested valve, monitors parameters such as pressure of the low-temperature working container 100, and monitors whether the temperature of the tested valve reaches a predetermined temperature, i.e. the temperature test requirement of the tested valve is met.
In step S3, the spraying pneumatic ball valve 201 of the liquid nitrogen spraying system 200 is closed, the nitrogen pressurizing system 300 is opened to output compressed nitrogen to the lower end of the cryogenic working container 100, and the pressurizing of the cryogenic working container 100 can be controlled by the pressurizing stop valve 304 and the pressurizing pneumatic ball valve 305 in the pressurizing system through a serial manner of remote control and on-site manual control.
In step S4, according to the requirements of the valve low temperature test, the pressure and temperature of the valve under test and the low temperature working container 100 are monitored, and the pressurized nitrogen is output from the upper end of the low temperature working container 100 to the valve under test until the pressure reaches the opening pressure point of the valve under test.
In step S5, according to the parameters of the flow meter on the pipeline of the monitoring test station 600, the pressure reducing valve 303 in the nitrogen pressurization system 300 is adjusted until the exhaust volume of the tested valve reaches the predetermined exhaust volume, so as to meet the exhaust volume required by the valve low-temperature test task book.
The valve low-temperature test method in the embodiment can simulate factors such as low temperature and volume of the rocket valve in the actual use process, and meets the requirements of adjustable air pillow volume, adjustable test medium temperature, controllable valve body temperature of the tested valve, adjustable test exhaust gas amount and the like aiming at tested valves of different types, so that the use environment of the tested valve in the rocket flight process is better reduced.
According to an embodiment of the present utility model, in step S3, further includes: the nitrogen self-pressurization system 500 connected to the upper and lower ends of the cryogenic working vessel 100 is opened, and the liquid nitrogen is vaporized to the cryogenic working vessel 100 through the vaporizer 502 to pressurize.
Specifically, when the pressure of the compressed nitrogen provided by the nitrogen pressurization system 300 does not reach the required opening pressure point of the valve under test, the nitrogen self-pressurization system 500 connected to the upper and lower ends of the cryogenic working vessel 100 is opened in step S3, and the liquid nitrogen is vaporized into the cryogenic working vessel 100 through the vaporizer 502 to pressurize the liquid nitrogen. The nitrogen self-pressurization system 500 is mainly used for a small exhaust gas amount test, such as a valve setting test.
According to an embodiment of the present utility model, in step S5, further includes: the adjustment of the pressure reducing valve 303 in the nitrogen pressurization system 300 is performed by monitoring the mass flow meter 602 parameters at the nitrogen inlet of the valve under test.
Specifically, in step S5, the pressure reducing valve 303 in the nitrogen pressurization system 300 is adjusted by monitoring the parameters of the mass flowmeter 602 at the nitrogen inlet of the valve under test, i.e., on the pipeline of the test station 600. The mode of replacing the traditional manual valve and the throttle orifice plate through the pressure reducing valve 303 and the mass flowmeter 602 can be used for measuring the exhaust amount of the tested valve more accurately, the pressure regulating of the pressure reducing valve 303 is used for changing the flow, the flow requirements of the tested valve under different working conditions can be met, and the time for replacing the throttle orifice plate in the test process is avoided.
According to one embodiment of the utility model, after step S5, it comprises: opening the exhaust pipeline of the low-temperature working container 100, reducing the pressure in the low-temperature working container 100 to 90% of the rated opening pressure, and repeating the steps S3-S5.
Specifically, the rated displacement test is repeated once after step S5, the first discharge line 104 of the cryogenic working container 100 is opened, the pressure of compressed nitrogen in the cryogenic working container 100 is reduced, and after the pressure of the cryogenic working container 100 reaches 90% of the rated opening pressure, steps S3 to S5 are repeated. The reliability of the data result can be ensured by repeating the exhaust gas amount test a plurality of times.
According to one embodiment of the present utility model, after step S5, further comprising: and opening the exhaust pipelines of the low-temperature working container 100 and the nitrogen self-pressurization system 500, and closing the nitrogen pressurization system 300 and the nitrogen self-pressurization system 500, thereby ending the low-temperature test.
Specifically, after step S5, the termination procedure is performed, the first exhaust line 104 of the low-temperature working container 100 and the second exhaust line 508 of the nitrogen self-pressurization system 500 are opened, the nitrogen in the valve low-temperature test system is exhausted, the nitrogen pressurization system 300 and the nitrogen self-pressurization system 500 are closed, and the whole valve low-temperature test is ended.
On the other hand, the utility model also provides a valve low-temperature test measurement and control system, which comprises: the filling module controls the liquid nitrogen supply system 400 to output liquid nitrogen to the lower end of the low-temperature working container 100, and stops filling until the liquid nitrogen filling amount meets the air pillow volume requirement; the spraying module is used for controlling the liquid nitrogen supply system 400 to output liquid nitrogen to the liquid nitrogen spraying system 200, spraying and cooling the tested valve, and monitoring that the temperature of the tested valve reaches a preset temperature; the pressurizing module is used for controlling to close the liquid nitrogen spraying system 200 and opening the nitrogen pressurizing system 300 to output compressed nitrogen to the lower end of the low-temperature working container 100; the testing module controls the upper end of the low-temperature working container 100 to output pressurized nitrogen to the tested valve until the pressure reaches the opening pressure point of the tested valve; and the exhaust module adjusts the pressure reducing valve 303 in the nitrogen pressurization system 300 until the exhaust amount of the tested valve reaches a preset exhaust amount.
According to one embodiment of the utility model, the valve low temperature test measurement and control system further comprises: the self-pressurizing module opens the nitrogen self-pressurizing system 500 connected to the upper and lower ends of the cryogenic working vessel 100, and pressurizes the cryogenic working vessel 100 by vaporizing liquid nitrogen through the vaporizer 502.
According to one embodiment of the utility model, the exhaust module is used to make adjustments to the pressure relief valve 303 in the nitrogen pressurization system 300 by monitoring the mass flow meter 602 parameters at the nitrogen inlet of the valve under test.
According to one embodiment of the utility model, the valve low temperature test measurement and control system further comprises: and the repeating module is used for opening the exhaust pipeline of the low-temperature working container 100, reducing the pressure in the low-temperature working container 100 to 90% of the rated opening pressure, and repeating the operations corresponding to the pressurizing module, the testing module and the exhaust module.
According to one embodiment of the utility model, the valve low temperature test measurement and control system further comprises: and a termination module for opening the exhaust pipelines of the low-temperature working container 100 and the nitrogen self-pressurization system 500 and closing the nitrogen pressurization system 300 and the nitrogen self-pressurization system 500.
The valve low-temperature test measurement and control system provided by the utility model is basically consistent with the content of the valve low-temperature test measurement and control method, and the technical effects in the corresponding embodiments are the same, and are not repeated here.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A valve cold test system, comprising:
the low-temperature working container is used for storing liquid nitrogen and compressed nitrogen and is connected with the tested valve through a pipeline so as to perform pressure test on the tested valve;
the liquid nitrogen spraying system is used for spraying and cooling the tested valve;
the liquid nitrogen supply system outputs liquid nitrogen to the low-temperature working container and the liquid nitrogen spraying system;
and the nitrogen pressurizing system outputs compressed nitrogen to the low-temperature working container.
2. The valve cold test system of claim 1, further comprising:
the nitrogen self-pressurization system is connected between the upper end and the lower end of the low-temperature working container and is used for pressurizing the low-temperature working container through liquid nitrogen vaporization.
3. The valve cold test system of claim 2, further comprising:
and the test station is connected to the upper end of the low-temperature working container and is used for setting a tested valve.
4. A valve cold test system according to claim 3, wherein a level gauge, a first pressure sensor and a first temperature sensor are provided on the cold working vessel.
5. The valve cold test system of claim 4, wherein a first vent line is provided at an upper end of the cold working vessel, the first vent line being provided with a pneumatic vent ball valve, a vent stop valve, a second pressure sensor, and a safety valve.
6. A valve cryostat system according to claim 3, characterised in that the line of the liquid nitrogen supply system is provided with a first filter and a liquid nitrogen filling pneumatic ball valve.
7. The valve low-temperature test system according to claim 3, wherein a nitrogen inlet stop valve, a second filter, a pressure reducing valve, a pressure increasing stop valve and a pressure increasing pneumatic ball valve are sequentially arranged on a pipeline from an inlet to an outlet of the nitrogen pressurizing system.
8. The valve low-temperature test system according to claim 3, wherein a self-pressurization pneumatic adjusting valve, a vaporizer, a third pressure sensor and a self-pressurization pneumatic ball valve are sequentially arranged on a pipeline of the nitrogen self-pressurization system from a lower end outlet to an upper end inlet of the low-temperature working container.
9. The valve cold test system of claim 8, wherein a second temperature sensor and a fourth pressure sensor are disposed on the vaporizer, a second exhaust pipeline is additionally disposed at an outlet of the vaporizer, and the second exhaust pipeline is provided with a self-pressurizing exhaust pneumatic ball valve for exhausting nitrogen.
10. A valve cryogenic test system according to claim 3, wherein the test station is provided with a test shut-off valve, a mass flow meter, a third temperature sensor and a fifth pressure sensor on the pipeline, and a fourth temperature sensor on the valve under test.
CN202121112889.4U 2021-05-24 2021-05-24 Valve low temperature test system Active CN219474949U (en)

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