CN204592847U - A kind of for pipeline low-temperature cyclic loading test system - Google Patents
A kind of for pipeline low-temperature cyclic loading test system Download PDFInfo
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- CN204592847U CN204592847U CN201520221643.9U CN201520221643U CN204592847U CN 204592847 U CN204592847 U CN 204592847U CN 201520221643 U CN201520221643 U CN 201520221643U CN 204592847 U CN204592847 U CN 204592847U
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Abstract
The utility model belongs to cryogenic pipe experimental technique field, is specifically related to a kind of for pipeline low-temperature cyclic loading test system.Supercharging liquid nitrogen storage tank is connected with safety valve group A, safety valve group A is connected with low temperature electric control valve A, low temperature electric control valve A is connected with the fluid inlet of vaporizer, the gaseous phase outlet of vaporizer is connected with safety valve group B, safety valve group B respectively with shutoff valve C, stop valve A, stop valve B connects, stop valve A is connected with the pneumatic die cushion supercharging import B of liquid nitrogen storage tank with filling, atmospheric valve B is provided with between stop valve A and pneumatic die cushion supercharging import B, stop valve B is connected with the pneumatic die cushion supercharging import A of liquid nitrogen storage tank with recovery, atmospheric valve A is provided with between stop valve B and pneumatic die cushion supercharging import A, shutoff valve C is connected with the liquid nitrogen import of knock out drum.The utility model circulating liquid nitrogen cools and supercharging testpieces, can meet the circulating liquid nitrogen of required flow and pressure, and flow and pressure adjustable joint.
Description
Technical field
The utility model belongs to cryogenic pipe experimental technique field, is specifically related to a kind of for pipeline low-temperature cyclic loading test system, when pipeline low-temperature environmental test, can provide the liquid nitrogen of steady pressure and flow for pipeline.
Background technique
Along with the development of China LNG technology, cryogenic liquid propellant rocket of new generation and ground loading system and spacecraft space environmental simulation equipment, the occasion of cryogenic pipe application is also come extensively.At aerospace field, the cryogenic pipeline system of low temperature carrier rocket is mainly used in the conveying of filling, cryogenic propellant, and cryogenic pipe provides required condition to outlet, i.e. the cryogenic liquide of certain pressure, flow etc.
Pipe-line system is as the important component part of carrier rocket, during flying, vibration coupling between rocket structure and rocket motor and pipe-line system may cause the extensional vibration POGO of whole rocket, this unstability vibration to rocket itself or useful load very harmful.So the characteristic of pipe-line system need be taken into full account during cryogenic pipe design, and verify that the means of design rationality are exactly working environment that is virtually reality like reality, and carry out environmental test.Test result, by more effective design, therefore has very large theory value and practical meaning in engineering to the enforcement of pipeline low-temperature cyclic loading test system.
Summary of the invention
The purpose of this utility model is to provide a kind of and cools and supercharging testpieces with circulating liquid nitrogen for pipeline low-temperature cyclic loading test system, and cooling can meet the simulation of test specimen low temperature environment, and pressure and flow can fine adjustments; This system also can be used for the isostructural working environment simulation of cabin body.
For achieving the above object, technical solution adopted in the utility model is:
A kind of for pipeline low-temperature cyclic loading test system, supercharging liquid nitrogen storage tank is connected with safety valve group A, safety valve group A is connected with low temperature electric control valve A, low temperature electric control valve A is connected with the fluid inlet of vaporizer, the gaseous phase outlet of vaporizer is connected with safety valve group B, safety valve group B respectively with shutoff valve C, stop valve A, stop valve B connects, stop valve A is connected with the pneumatic die cushion supercharging import B of liquid nitrogen storage tank with filling, atmospheric valve B is provided with between stop valve A and pneumatic die cushion supercharging import B, stop valve B is connected with the pneumatic die cushion supercharging import A of liquid nitrogen storage tank with recovery, atmospheric valve A is provided with between stop valve B and pneumatic die cushion supercharging import A, shutoff valve C is connected with the liquid nitrogen import of knock out drum, reclaim and be connected with liquid valve A with liquid nitrogen storage tank, liquid valve A respectively with safety valve group C, stop valve D, low temperature electric control valve C connects, filling is connected with liquid valve B with liquid nitrogen storage tank, liquid valve B respectively with stop valve D, safety valve group D, low temperature electric control valve B connects, low temperature electric control valve C is connected with flowmeter B, flowmeter B is connected with safety valve group E, safety valve group E exports with the restricting orifice of restricting orifice and is connected, low temperature electric control valve B is connected with flowmeter A, flowmeter A is connected with the liquid nitrogen import of knock out drum, knock out drum is connected with low temperature electric control valve D, the liquid nitrogen outlet of knock out drum is connected with the test specimen import of test specimen, the test specimen outlet of test specimen is connected with the restricting orifice import of restricting orifice, test specimen import is provided with pressure transducer and connects.
Described supercharging liquid nitrogen storage tank provides liquid nitrogen for recovery liquid nitrogen storage tank and the supercharging of filling liquid nitrogen storage tank pneumatic die cushion, liquid nitrogen is after low temperature electric control valve A adjust flux, fluid inlet through vaporizer is vaporized, nitrogen after vaporization is from the gaseous phase outlet of vaporizer, pass into recovery liquid nitrogen storage tank pneumatic die cushion supercharging import A and filling liquid nitrogen storage tank pneumatic die cushion supercharging import B respectively, extruded from liquid nitrogen storage tank by liquid nitrogen, for system provides the liquid nitrogen of required flow, stop valve A controls the liquid nitrogen storage tank selecting supercharging; Atmospheric valve A and atmospheric valve B is provided with respectively before pneumatic die cushion supercharging import A and pneumatic die cushion supercharging import B; Liquid nitrogen import is communicated with filling liquid nitrogen storage tank liquid outlet, and knock out drum can simulative tube roadside circle, also Absorbable organic halogens pressure and flow; The test specimen inlet communication of the outlet of knock out drum liquid nitrogen and test specimen, test specimen outlet is provided with restricting orifice, and liquid nitrogen is current limliting after restricting orifice, and the one-level completing liquid nitrogen flow regulates; Liquid nitrogen filling and reclaim line are provided with orifice meter A and orifice meter B respectively, and by the flow value teletransmission of liquid nitrogen in pipeline to controller; Liquid nitrogen, after reclaim line, flows into recovery liquid nitrogen storage tank, completes loaded cycle; Charging line in liquid nitrogen pipeline and reclaim line are provided with low temperature electric control valve B and low temperature electric control valve C respectively; The vaporizer outlets of vaporizer arranges a bypass, bypass is provided with shutoff valve C, is communicated with by charging line with vaporizer outlets; Stop valve D is by recovery liquid nitrogen storage tank and filling liquid nitrogen storage tank liquid nitrogen outlet.
The workflow of described system is:
(1) test the preparatory stage, check that whether low temperature electric control valve A, low temperature electric control valve B, low temperature electric control valve C, low temperature electric control valve D, atmospheric valve A, atmospheric valve B, safety valve group A, safety valve group B, safety valve group C, safety valve group D, safety valve group E original state be correct; Confirm that flowmeter A, flowmeter B, pressure sensor signal are normal; (2) system replaces is the supercharging of supercharging liquid nitrogen storage tank pneumatic die cushion, and the stop valve of the group C that opens the safety-valve, opens low temperature electric control valve A, open shutoff valve C; Liquid nitrogen is vaporizated into after nitrogen through vaporizer, passes into pipe-line system through shutoff valve C, and the gas medium in pipe-line system is replaced into nitrogen; (3) pipeline filling liquid nitrogen, pipeline filling liquid nitrogen is also the process of pipeline precooling, open stop valve B, atmospheric valve B, liquid valve A, liquid valve B, low temperature electric control valve B, low temperature electric control valve D, regulate low temperature electric control valve C to control the flow of liquid nitrogen needed for precooling; Liquid nitrogen is circulated to filling liquid nitrogen storage tank through low temperature electric control valve C, flowmeter B, restricting orifice, test specimen, knock out drum, flowmeter A, low temperature electric control valve B, and when filling is risen by liquid nitrogen storage tank liquid level, pipeline filling liquid nitrogen completes; (4) pipeline supercharging, close cryogenic flow adjustable valve C, low temperature electric control valve D, open liquid valve B, stop valve A, regulate low temperature electric control valve A, liquid nitrogen enters pneumatic die cushion supercharging import B through vaporizer, starts as the supercharging of supercharging liquid nitrogen storage tank pneumatic die cushion, monitoring pressure sensor values, after reaching setting value, pipeline supercharging completes; (5) loaded cycle, opens atmospheric valve A, liquid valve A, liquid valve B, regulates low temperature electric control valve C pilot pressure to stablize, regulates low temperature mortor operated valve B to control stability of flow, regulate low temperature electric control valve A to control filling liquid nitrogen storage tank pneumatic die cushion pressure stability; (6) off-test, after off-test, close low temperature electric control valve A, low temperature electric control valve B, low temperature electric control valve C, open low temperature electric control valve D, safety valve group A, pressure piping unloads and be depressed into normal pressure by safety valve group B, safety valve group C, safety valve group D, safety valve group E valve.
Described flowmeter A, flowmeter B adopt flange connection, and flowmeter A, flowmeter B are provided with transmitter, liquid nitrogen flow are passed through the mode teletransmission of signal to control system, are realized the closed loop control of liquid nitrogen flow by low temperature electric control valve B.
Described knock out drum is arranged on the ingress of test pipeline, and knock out drum is furnished with pressure and fluid level transmitter, the pressure in it and liquid level is passed through the mode teletransmission of signal to control system, the liquid level of tester Real-Time Monitoring knock out drum internal pressure and liquid nitrogen.
Beneficial effect acquired by the utility model is:
Described in the utility modelly with circulating liquid nitrogen, testpieces to be cooled and supercharging for pipeline low-temperature test cycle loading system, the circulating liquid nitrogen of required flow and pressure can be met, and flow and pressure adjustable joint.The utility model uses liquid nitrogen as low-temperature receiver, uses knock out drum to play the effect of voltage stabilizing and regime flow, can simulate the integrated environment of low temperature flowing state with pressure.Operation system setting charging line and reclaim line, can make liquid nitrogen recycle, and reduces experimentation cost, improves test efficiency.Low-temperature circulating loading system described in the utility model utilizes liquid nitrogen as low temperature cold source, uses conventional Subzero valve and low temperature storing tank, realizes in the circulation filling process of liquid nitrogen, the closed loop control of pressure, flow.In low temperature environment process of the test, pressure, stability of flow, liquid nitrogen loss is low.Principle design can be applied to the test such as Subzero valve, cryogenic pipe by system, and the application of low temperature environment simulation, and application area is wider.The utility model provides the circulating liquid nitrogen of steady pressure, flow, for test specimen provides the low temperature environment of flowing liquid nitrogen state, can the working environment of imitation specimen really, and the stability of a system is good, and pressure controling precision can reach 1%, and system maintenance easy.
Accompanying drawing explanation
Fig. 1 is for pipeline low-temperature cyclic loading test systematic schematic diagram;
Fig. 2 is pipeline low-temperature test cycle filling flow chart;
In figure: 1, supercharging liquid nitrogen storage tank; 2, liquid nitrogen storage tank is used in recovery; 2a, pneumatic die cushion supercharging import A; 3, liquid nitrogen storage tank is used in filling; 3a, pneumatic die cushion supercharging import B; 4, knock out drum; 4a, liquid nitrogen import; 4b, liquid nitrogen export; 5, safety valve group A; 6, low temperature electric control valve A; 7, vaporizer; 7a, fluid inlet; 7b, gaseous phase outlet; 8, safety valve group B; 9, stop valve A; 10, stop valve B; 11, atmospheric valve A; 12, shutoff valve C; 13, liquid valve A; 14, safety valve group C; 15, atmospheric valve B; 16, liquid valve B; 17, stop valve D; 18, safety valve group D; 19, low temperature electric control valve B; 20, low temperature electric control valve C; 21, flowmeter A; 22, flowmeter B; 23, safety valve group E; 24, low temperature electric control valve D; 25, test specimen; 25a, test specimen import; 25b, test specimen export; 26, restricting orifice; 26a, restricting orifice import; 26b, restricting orifice export; 27, pressure transducer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
As shown in Figure 1, the annexation of pipeline low-temperature test cycle loading system described in the utility model is: supercharging liquid nitrogen storage tank 1 is connected with safety valve group A5, safety valve group A5 is connected with low temperature electric control valve A6, low temperature electric control valve A6 is connected with the fluid inlet 7a of vaporizer 7, the gaseous phase outlet 7b of vaporizer 7 is connected with safety valve group B8, safety valve group B8 respectively with shutoff valve C 12, stop valve A9, stop valve B10 connects, stop valve A9 is connected with the pneumatic die cushion supercharging import B3a of liquid nitrogen storage tank 3 with filling, atmospheric valve B15 is provided with between stop valve A9 and pneumatic die cushion supercharging import B3a, stop valve B10 is connected with the pneumatic die cushion supercharging import A2a of liquid nitrogen storage tank 2 with recovery, atmospheric valve A11 is provided with between stop valve B10 and pneumatic die cushion supercharging import A2a, shutoff valve C 12 is connected with the liquid nitrogen import 4a of knock out drum 4, reclaim and be connected with liquid valve A13 with liquid nitrogen storage tank 2, liquid valve A13 respectively with safety valve group C14, stop valve D17, low temperature electric control valve C20 connects, filling is connected with liquid valve B16 with liquid nitrogen storage tank 3, liquid valve B16 respectively with stop valve D17, safety valve group D18, low temperature electric control valve B19 connects, low temperature electric control valve C20 is connected with flowmeter B22, flowmeter B22 is connected with safety valve group E23, safety valve group E23 exports 26b with the restricting orifice of restricting orifice 26 and is connected, low temperature electric control valve B19 is connected with flowmeter A21, flowmeter A21 is connected with the liquid nitrogen import 4a of knock out drum 4, knock out drum 4 is connected with low temperature electric control valve D24, the liquid nitrogen outlet 4b of knock out drum 4 is connected with the test specimen import 25a of test specimen 25, the test specimen outlet 25b of test specimen 25 is connected with the restricting orifice import 26a of restricting orifice 26, test specimen import 25a is provided with pressure transducer 27 and connects.
Wherein, supercharging liquid nitrogen storage tank 1 provides liquid nitrogen for recovery liquid nitrogen storage tank 2 and the supercharging of filling liquid nitrogen storage tank 3 pneumatic die cushion, liquid nitrogen is after low temperature electric control valve A6 adjust flux, vaporize through the fluid inlet 7a of vaporizer 7, nitrogen after vaporization is from the gaseous phase outlet 7b of vaporizer 7, pass into recovery liquid nitrogen storage tank 2 pneumatic die cushion supercharging import A2a and filling liquid nitrogen storage tank 3 pneumatic die cushion supercharging import B3a respectively, liquid nitrogen is extruded from liquid nitrogen storage tank, for system provides the liquid nitrogen of required flow, stop valve A9 controls the liquid nitrogen storage tank selecting supercharging.Atmospheric valve A11 and atmospheric valve B15 is provided with respectively before pneumatic die cushion supercharging import A2a and pneumatic die cushion supercharging import B3a.Liquid nitrogen import 4a is communicated with filling liquid nitrogen storage tank 3 liquid outlet, and knock out drum 4 opens can simulative tube roadside circle, the also effect of Absorbable organic halogens pressure and flow.Knock out drum liquid nitrogen outlet 4b is communicated with the test specimen import 25a of test specimen 25, and test specimen outlet 25b is provided with restricting orifice 26, and liquid nitrogen is current limliting after restricting orifice 26, and the one-level completing liquid nitrogen flow regulates.Liquid nitrogen filling and reclaim line are provided with orifice meter A21 and orifice meter B22 respectively, and by the flow value teletransmission of liquid nitrogen in pipeline to controller.Liquid nitrogen, after reclaim line, flows into recovery liquid nitrogen storage tank 2, completes loaded cycle.Charging line in liquid nitrogen pipeline and reclaim line are provided with low temperature electric control valve B19 and low temperature electric control valve C20 respectively.The vaporizer outlets 7b of vaporizer 7 arranges a bypass, bypass is provided with shutoff valve C 12, is communicated with by charging line with vaporizer outlets 7b.Stop valve D17 is by recovery liquid nitrogen storage tank 2 and filling liquid nitrogen storage tank 3 liquid nitrogen outlet.
As shown in Figure 2, pipeline low-temperature cyclic loading test working-flow is:
(1) test the preparatory stage, check that whether low temperature electric control valve A6, low temperature electric control valve B19, low temperature electric control valve C20, low temperature electric control valve D24, atmospheric valve A11, atmospheric valve B15, safety valve group A5, safety valve group B8, safety valve group C14, safety valve group D18, safety valve group E23 original state be correct; Confirm that flowmeter A21, flowmeter B22, pressure transducer 27 signal are normal.
(2) system replaces is the supercharging of supercharging liquid nitrogen storage tank 1 pneumatic die cushion, and the stop valve 14c of the group C14 that opens the safety-valve, opens low temperature electric control valve A6, open shutoff valve C 12.Liquid nitrogen, after vaporizer 7 is vaporizated into nitrogen, passes into pipe-line system through shutoff valve C 12, and the gas medium in pipe-line system is replaced into nitrogen.
(3) pipeline filling liquid nitrogen, pipeline filling liquid nitrogen is also the process of pipeline precooling, open stop valve B10, atmospheric valve B15, liquid valve A13, liquid valve B16, low temperature electric control valve B19, low temperature electric control valve D24, regulate low temperature electric control valve C20 to control the flow of liquid nitrogen needed for precooling.Liquid nitrogen is circulated to filling liquid nitrogen storage tank 3 through low temperature electric control valve C20, flowmeter B22, restricting orifice 26, test specimen 25, knock out drum 4, flowmeter A21, low temperature electric control valve B19, when filling is risen by liquid nitrogen storage tank 3 liquid level, pipeline filling liquid nitrogen completes.
(4) pipeline supercharging, close cryogenic flow adjustable valve C20, low temperature electric control valve D24, open liquid valve B16, stop valve A9, regulate low temperature electric control valve A6, liquid nitrogen enters pneumatic die cushion supercharging import B3a through vaporizer 7, starts as the supercharging of supercharging liquid nitrogen storage tank 3 pneumatic die cushion, monitoring pressure sensor 27 numerical value, after reaching setting value, pipeline supercharging completes.
(5) loaded cycle, open atmospheric valve A11, liquid valve A13, liquid valve B16, regulate low temperature electric control valve C20 pilot pressure to stablize, regulate low temperature mortor operated valve B19 to control stability of flow, regulate low temperature electric control valve A6 to control filling liquid nitrogen storage tank 3 pneumatic die cushion pressure stability.
(6) off-test, after off-test, close low temperature electric control valve A6, low temperature electric control valve B19, low temperature electric control valve C20, open low temperature electric control valve D24, safety valve group A5, pressure piping unloads and be depressed into normal pressure by safety valve group B8, safety valve group C14, safety valve group D18, safety valve group E23 valve.
Supercharging liquid nitrogen storage tank 1, for being the supercharging of filling liquid nitrogen storage tank 3 pneumatic die cushion, by the amount of liquid nitrogen of low temperature electric control valve A6 control flow check overflash device 7, regulating filling liquid nitrogen storage tank 3 pneumatic die cushion pressure, and makes liquid nitrogen circulation loop pressure remain stable.
Liquid nitrogen filling storage tank 3 adopts fashion of extrusion, liquid nitrogen is delivered to liquid nitrogen circulation loop, and reaches the object of liquid nitrogen circulation.
Liquid nitrogen reclaims storage tank 2 and is reclaimed by the liquid nitrogen in liquid nitrogen circulation loop, reaches the object of liquid nitrogen recycling.
The secondary meter that flowmeter A21 and B22 measures as liquid nitrogen flow, completes the closed loop feed back of liquefied ammonia flow.
Knock out drum 4 utilizes self pneumatic die cushion volume, reaches the function of stable loine pressure and regime flow.Knock out drum 4 is furnished with the electronic atmospheric valve D24 of low temperature, can realize the function of pipeline release.
Supercharging liquid nitrogen storage tank 1 utilizes and carries out supercharging from supercharging to body pneumatic die cushion, is furnished with supercharging liquid nitrogen pipeline, supercharging return line and self-pressure evaporator.Liquid nitrogen, after self-pressure evaporator vaporization, passes into storage tank pneumatic die cushion through supercharging return line, realizes from supercharging, and as the pressure source of pipeline low-temperature test cycle loading system.
Vaporizer 7 is arranged in liquid nitrogen filling storage tank supercharging return line, is vaporized by the liquid nitrogen in supercharging liquid nitrogen storage tank 1 fluid pipeline, realizes the supercharging of liquid nitrogen filling storage tank 3 pneumatic die cushion.
Low temperature electric control valve A6, B19, C20 are the nucleus equipments of the adjustment of pipeline low-temperature test cycle loading system pressure and Flow-rate adjustment, the control signal that low temperature electric control valve C20 provides according to control system, regulating spool aperture, and the closed loop control being completed pressure by the feedback signal of pressure transducer 27.Low temperature electric control valve A6, B19, C20 are arranged on liquid nitrogen filling storage tank supercharging return line, liquid nitrogen charging line, liquid nitrogen reclaim line respectively.
Flowmeter A21, B22 are arranged in liquid nitrogen charging line and liquid nitrogen reclaim line respectively, for measuring the flow of liquid nitrogen in liquid nitrogen circulation loop.Flowmeter A21, B22 adopt flange connection, facilitate installation and maintenance.Flowmeter A21, B22 are provided with transmitter, and by the mode of liquid nitrogen flow by signal, teletransmission, to control system, realizes the closed loop control of liquid nitrogen flow by low temperature electric control valve B19.
Knock out drum 4 is arranged on the ingress of test pipeline, for stability test loine pressure and flow, reduces the fluctuation in process of the test.Knock out drum 4 is furnished with pressure and fluid level transmitter, and by the pressure in knock out drum and the liquid level mode by signal, teletransmission, to control system, facilitates the liquid level of tester Real-Time Monitoring knock out drum internal pressure and liquid nitrogen.
During the work of pipeline low-temperature test cycle loading system, supercharging liquid nitrogen storage tank 1 starts from supercharging, regulate pneumatic die cushion pressure to goal pressure, open pipeline atmospheric valve C14,18, open pipeline displacement valve 12, start to replace liquid nitrogen circulation loop, after having replaced, blind off a line displacement valve 12 and pipeline atmospheric valve 14,18.
Starting Low-temperature pressure modulating valve A6 is the supercharging of recovery liquid nitrogen storage tank 2 pneumatic die cushion.Open filling liquid nitrogen storage tank 3 atmospheric valve B15, open the electronic atmospheric valve D24 of low temperature that knock out drum 4 configures, open recovery liquid nitrogen storage tank 2 liquid valve liquid valve A13, open filling liquid storage tank 3 liquid valve B16, regulate charging line low temperature electric control valve C20, start the precooling of liquid nitrogen circulation loop.
After precooling completes, close the electronic atmospheric valve D24 of low temperature that knock out drum 4 configures, start as filling liquid nitrogen in knock out drum 4, and carry out supercharging for pipeline.
After being pressurized to goal pressure, by regulating liquid nitrogen reclaim line low temperature electric control valve C20, controlling test specimen outlet pressure value stabilization, controlling liquid nitrogen flow in liquid nitrogen circulation loop by regulating liquid nitrogen charging line low temperature electric control valve B19.Liquid nitrogen, through filling liquid nitrogen storage tank 3, liquid nitrogen circulation loop, low temperature valve B19, C20, knock out drum 4, test specimen 25, is recycled to recovery liquid nitrogen storage tank 2 by liquid nitrogen.
Claims (5)
1. one kind for pipeline low-temperature cyclic loading test system, it is characterized in that: supercharging liquid nitrogen storage tank (1) is connected with safety valve group A (5), safety valve group A (5) is connected with low temperature electric control valve A (6), low temperature electric control valve A (6) is connected with the fluid inlet (7a) of vaporizer (7), the gaseous phase outlet (7b) of vaporizer (7) is connected with safety valve group B (8), safety valve group B (8) respectively with shutoff valve C (12), stop valve A (9), stop valve B (10) connects, stop valve A (9) is connected with pneumatic die cushion supercharging import B (3a) of liquid nitrogen storage tank (3) with filling, atmospheric valve B (15) is provided with between stop valve A (9) and pneumatic die cushion supercharging import B (3a), stop valve B (10) is connected with pneumatic die cushion supercharging import A (2a) of liquid nitrogen storage tank (2) with recovery, atmospheric valve A (11) is provided with between stop valve B (10) and pneumatic die cushion supercharging import A (2a), shutoff valve C (12) is connected with the liquid nitrogen import (4a) of knock out drum (4), reclaim and be connected with liquid valve A (13) with liquid nitrogen storage tank (2), liquid valve A (13) respectively with safety valve group C (14), stop valve D (17), low temperature electric control valve C (20) connects, filling is connected with liquid valve B (16) with liquid nitrogen storage tank (3), liquid valve B (16) respectively with stop valve D (17), safety valve group D (18), low temperature electric control valve B (19) connects, low temperature electric control valve C (20) is connected with flowmeter B (22), flowmeter B (22) is connected with safety valve group E (23), safety valve group E (23) exports (26b) with the restricting orifice of restricting orifice (26) and is connected, low temperature electric control valve B (19) is connected with flowmeter A (21), flowmeter A (21) is connected with the liquid nitrogen import (4a) of knock out drum (4), knock out drum (4) is connected with low temperature electric control valve D (24), liquid nitrogen outlet (4b) of knock out drum (4) is connected with the test specimen import (25a) of test specimen (25), test specimen outlet (25b) of test specimen (25) is connected with the restricting orifice import (26a) of restricting orifice (26), test specimen import (25a) is provided with pressure transducer (27) and connects.
2. according to claim 1 for pipeline low-temperature cyclic loading test system, it is characterized in that: described supercharging liquid nitrogen storage tank (1) provides liquid nitrogen for recovery liquid nitrogen storage tank (2) and filling liquid nitrogen storage tank (3) pneumatic die cushion supercharging, liquid nitrogen is after low temperature electric control valve A (6) adjust flux, fluid inlet (7a) through vaporizer (7) is vaporized, nitrogen after vaporization is from the gaseous phase outlet (7b) of vaporizer (7), pass into recovery liquid nitrogen storage tank (2) pneumatic die cushion supercharging import A (2a) and filling liquid nitrogen storage tank (3) pneumatic die cushion supercharging import B (3a) respectively, liquid nitrogen is extruded from liquid nitrogen storage tank, for system provides the liquid nitrogen of required flow, stop valve A (9) controls the liquid nitrogen storage tank selecting supercharging, pneumatic die cushion supercharging import A (2a) and pneumatic die cushion supercharging import B (3a) is front is provided with atmospheric valve A (11) and atmospheric valve B (15) respectively, liquid nitrogen import (4a) is communicated with filling liquid nitrogen storage tank (3) liquid outlet, and knock out drum (4) can simulative tube roadside circle, also Absorbable organic halogens pressure and flow, knock out drum liquid nitrogen outlet (4b) is communicated with the test specimen import (25a) of test specimen (25), test specimen outlet (25b) is provided with restricting orifice (26), liquid nitrogen is current limliting after restricting orifice (26), and the one-level completing liquid nitrogen flow regulates, liquid nitrogen filling and reclaim line are provided with orifice meter A (21) and orifice meter B (22) respectively, and by the flow value teletransmission of liquid nitrogen in pipeline to controller, liquid nitrogen, after reclaim line, flows into recovery with liquid nitrogen storage tank (2), completes loaded cycle, charging line in liquid nitrogen pipeline and reclaim line are provided with low temperature electric control valve B (19) and low temperature electric control valve C (20) respectively, the vaporizer outlets (7b) of vaporizer (7) arranges a bypass, bypass is provided with shutoff valve C (12), is communicated with by charging line with vaporizer outlets (7b), stop valve D (17) is by recovery liquid nitrogen storage tank (2) and filling liquid nitrogen storage tank (3) liquid nitrogen outlet.
3. according to claim 1 for pipeline low-temperature cyclic loading test system, it is characterized in that: the workflow of described system is:
(1) test the preparatory stage, check that whether low temperature electric control valve A (6), low temperature electric control valve B (19), low temperature electric control valve C (20), low temperature electric control valve D (24), atmospheric valve A (11), atmospheric valve B (15), safety valve group A (5), safety valve group B (8), safety valve group C (14), safety valve group D (18), safety valve group E (23) original state be correct; Confirm that flowmeter A (21), flowmeter B (22), pressure transducer (27) signal are normal; (2) system replaces is supercharging liquid nitrogen storage tank (1) pneumatic die cushion supercharging, and open the safety-valve group C (14), opens low temperature electric control valve A (6), open shutoff valve C (12); Liquid nitrogen, after vaporizer (7) is vaporizated into nitrogen, passes into pipe-line system through shutoff valve C (12), and the gas medium in pipe-line system is replaced into nitrogen; (3) pipeline filling liquid nitrogen, pipeline filling liquid nitrogen is also the process of pipeline precooling, open stop valve B (10), atmospheric valve B (15), liquid valve A (13), liquid valve B (16), low temperature electric control valve B (19), low temperature electric control valve D (24), regulate low temperature electric control valve C (20) to control the flow of liquid nitrogen needed for precooling; Liquid nitrogen is circulated to filling liquid nitrogen storage tank (3) through low temperature electric control valve C (20), flowmeter B (22), restricting orifice (26), test specimen (25), knock out drum (4), flowmeter A (21), low temperature electric control valve B (19), when filling is risen by liquid nitrogen storage tank (3) liquid level, pipeline filling liquid nitrogen completes; (4) pipeline supercharging, close cryogenic flow adjustable valve C (20), low temperature electric control valve D (24), open liquid valve B (16), stop valve A (9), regulate low temperature electric control valve A (6), liquid nitrogen enters pneumatic die cushion supercharging import B (3a) through vaporizer (7), start as supercharging liquid nitrogen storage tank (3) pneumatic die cushion supercharging, monitoring pressure sensor (27) numerical value, after reaching setting value, pipeline supercharging completes; (5) loaded cycle, open atmospheric valve A (11), liquid valve A (13), liquid valve B (16), low temperature electric control valve C (20) pilot pressure is regulated to stablize, regulate low temperature mortor operated valve B (19) to control stability of flow, regulate low temperature electric control valve A (6) to control filling liquid nitrogen storage tank (3) pneumatic die cushion pressure stability; (6) off-test, after off-test, close low temperature electric control valve A (6), low temperature electric control valve B (19), low temperature electric control valve C (20), open low temperature electric control valve D (24), safety valve group A (5), pressure piping unloads and be depressed into normal pressure by safety valve group B (8), safety valve group C (14), safety valve group D (18), safety valve group E (23) valve.
4. according to claim 1 for pipeline low-temperature cyclic loading test system, it is characterized in that: described flowmeter A (21), flowmeter B (22) adopt flange connection, (22) are provided with transmitter for flowmeter A (21), flowmeter B, liquid nitrogen flow is passed through the mode teletransmission of signal to control system, realized the closed loop control of liquid nitrogen flow by low temperature electric control valve B (19).
5. according to claim 1 for pipeline low-temperature cyclic loading test system, it is characterized in that: described knock out drum (4) is arranged on the ingress of test pipeline, knock out drum (4) is furnished with pressure and fluid level transmitter, pressure in it and liquid level are passed through the mode teletransmission of signal to control system, the liquid level of tester Real-Time Monitoring knock out drum internal pressure and liquid nitrogen.
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| CN201520221643.9U CN204592847U (en) | 2015-04-13 | 2015-04-13 | A kind of for pipeline low-temperature cyclic loading test system |
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| CN201520221643.9U CN204592847U (en) | 2015-04-13 | 2015-04-13 | A kind of for pipeline low-temperature cyclic loading test system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444973A (en) * | 2015-11-17 | 2016-03-30 | 上海航天精密机械研究所 | Low-temperature-pressure automatic pressure-increasing balance device |
| CN106151865A (en) * | 2015-04-13 | 2016-11-23 | 天津航天瑞莱科技有限公司 | A kind of for pipeline low-temperature cyclic loading test system |
| CN107543028A (en) * | 2016-10-17 | 2018-01-05 | 北京卫星环境工程研究所 | Large-scale reverberation chamber air source structure based on remote control |
| CN110331945A (en) * | 2019-03-27 | 2019-10-15 | 中国石油大学(华东) | Polar region drilling platforms derrick Heat preservation experimental provision and experimental method |
| CN110345378A (en) * | 2019-07-16 | 2019-10-18 | 西南石油大学 | A kind of experimental provision of the non-equilibrium gas-liquid two-phase pipeline flowing of test liquefied natural gas |
| CN113318506A (en) * | 2021-05-31 | 2021-08-31 | 浙江伟鸿水处理设备有限公司 | Water and gas distribution system of flap filter |
-
2015
- 2015-04-13 CN CN201520221643.9U patent/CN204592847U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151865A (en) * | 2015-04-13 | 2016-11-23 | 天津航天瑞莱科技有限公司 | A kind of for pipeline low-temperature cyclic loading test system |
| CN105444973A (en) * | 2015-11-17 | 2016-03-30 | 上海航天精密机械研究所 | Low-temperature-pressure automatic pressure-increasing balance device |
| CN105444973B (en) * | 2015-11-17 | 2018-06-26 | 上海航天精密机械研究所 | Low-temperature pressure Automatic-boosting balancing device |
| CN107543028A (en) * | 2016-10-17 | 2018-01-05 | 北京卫星环境工程研究所 | Large-scale reverberation chamber air source structure based on remote control |
| CN107543028B (en) * | 2016-10-17 | 2019-06-11 | 北京卫星环境工程研究所 | Based on the large-scale reverberation chamber air source structure remotely controlled |
| CN110331945A (en) * | 2019-03-27 | 2019-10-15 | 中国石油大学(华东) | Polar region drilling platforms derrick Heat preservation experimental provision and experimental method |
| CN110345378A (en) * | 2019-07-16 | 2019-10-18 | 西南石油大学 | A kind of experimental provision of the non-equilibrium gas-liquid two-phase pipeline flowing of test liquefied natural gas |
| CN110345378B (en) * | 2019-07-16 | 2020-11-24 | 西南石油大学 | Experimental device for testing flow of liquefied natural gas non-equilibrium gas-liquid two-phase pipeline |
| CN113318506A (en) * | 2021-05-31 | 2021-08-31 | 浙江伟鸿水处理设备有限公司 | Water and gas distribution system of flap filter |
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