CN218121666U - Liquid nitrogen supply distribution system for high-accelerated life test box - Google Patents
Liquid nitrogen supply distribution system for high-accelerated life test box Download PDFInfo
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- CN218121666U CN218121666U CN202222389151.3U CN202222389151U CN218121666U CN 218121666 U CN218121666 U CN 218121666U CN 202222389151 U CN202222389151 U CN 202222389151U CN 218121666 U CN218121666 U CN 218121666U
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Abstract
The application provides a liquid nitrogen supply distribution system for high accelerated life test case, includes: one end of the main liquid nitrogen pipeline is a closed end, the other end of the main liquid nitrogen pipeline is communicated with one end of a liquid nitrogen conveying pipeline, one end, far away from the main liquid nitrogen pipeline, of the liquid nitrogen conveying pipeline is used for being communicated with a liquid nitrogen inlet of the high-accelerated life test box, and a first booster pump is arranged on the liquid nitrogen conveying pipeline; a plurality of first through holes are formed in the main liquid nitrogen pipeline; the liquid nitrogen supply tank that is filled with the liquid nitrogen has a plurality ofly, and the top of every liquid nitrogen supply tank has been seted up the liquid nitrogen export and has been gone up the intercommunication in every liquid nitrogen export and have a liquid nitrogen distribution pipeline, and the inside intercommunication of first through-hole and liquid nitrogen trunk line is run through to the one end that liquid nitrogen export was kept away from to every liquid nitrogen distribution pipeline, is provided with the second booster pump on every liquid nitrogen distribution pipeline. According to the liquid nitrogen supply method and device, continuous supply of liquid nitrogen in the HALT test process is achieved, the out-of-tolerance phenomenon caused by liquid nitrogen replacement in the HALT test is avoided, and the accuracy of the result of the HALT test is improved.
Description
Technical Field
The application relates to a liquid nitrogen supply distribution technology of a high-acceleration life test box, in particular to a liquid nitrogen supply distribution system for the high-acceleration life test box.
Background
The high Accelerated Life test (HALT test) is a process for revealing design defects and deficiencies of electronic and mechanical assemblies by using a rapid high and low temperature transformation oscillation system. The goal of the HALT test is to identify the functional and damage limits of the product at an early stage of product development to optimize the reliability of the product, and the HALT test needs to be completed using a high accelerated life test chamber.
When the low-temperature link of the high-acceleration life test is carried out, liquid nitrogen needs to be continuously and rapidly supplied to the high-acceleration life test box through the liquid nitrogen tank, so that the requirement of cooling the high-acceleration life test box is met, and the temperature of a sample in the high-acceleration life test box can be changed at the fastest speed.
In the actual use process of the high accelerated life test box, the test time is long and the test continuity causes that the amount of liquid nitrogen needed in the HALT test process is large, and a liquid nitrogen tank with any capacity cannot meet the liquid nitrogen supply requirement of a complete HALT test. Therefore, the liquid nitrogen tank needs to be replaced in the HALT test, but if the supply head of the liquid nitrogen is directly cut off and then a bottle of liquid nitrogen tank filled with the liquid nitrogen is replaced, at least 2-3 minutes are needed, and the out-of-tolerance phenomenon of the HALT test can be caused in the process of replacing the liquid nitrogen tank, namely, no liquid nitrogen supply time interval exists in the HALT test process, the refrigeration cannot meet the requirement, and the accuracy of the result of the HALT test is low.
SUMMERY OF THE UTILITY MODEL
The application provides a liquid nitrogen supply distribution system for a high-acceleration life test box, which is used for solving the problem that in the actual use process of the high-acceleration life test box, the liquid nitrogen amount required in the HALT test process is large due to long test time and test continuity, and a liquid nitrogen tank with any capacity cannot meet the liquid nitrogen supply requirement of a complete HALT test. And the out-of-tolerance phenomenon of the HALT test can be caused in the process of replacing the liquid nitrogen tank, so that the accuracy of the result of the HALT test is low.
In order to solve the technical problems, the application adopts the following technical scheme:
the application provides a liquid nitrogen supply distribution system for a high-accelerated life test box, which comprises a liquid nitrogen main pipeline, a plurality of liquid nitrogen distribution pipelines, a liquid nitrogen conveying pipeline and a liquid nitrogen supply tank;
one end of the main liquid nitrogen pipeline is a closed end, the other end of the main liquid nitrogen pipeline is communicated with one end of the liquid nitrogen conveying pipeline, which is far away from the main liquid nitrogen pipeline, is used for communicating a liquid nitrogen inlet of the high-accelerated life test box, and a first booster pump is arranged on the liquid nitrogen conveying pipeline; a plurality of first through holes are formed in the main liquid nitrogen pipeline;
the liquid nitrogen supply tank is provided with a plurality of liquid nitrogen supply tanks, liquid nitrogen is filled in each liquid nitrogen supply tank, a liquid nitrogen outlet is formed in the top of each liquid nitrogen supply tank, each liquid nitrogen outlet is communicated with one liquid nitrogen distribution pipeline, one end, far away from the liquid nitrogen outlet, of each liquid nitrogen distribution pipeline penetrates through the first through hole and is communicated with the inside of the main liquid nitrogen pipeline, and a second booster pump is arranged on each liquid nitrogen distribution pipeline.
Optionally, the liquid nitrogen supply distribution system of the high accelerated life test box provided by the application further comprises a safety valve and a liquid nitrogen collection assembly;
the safety valve is arranged on the main liquid nitrogen pipeline and used for detecting the pressure of liquid nitrogen in the main liquid nitrogen pipeline and releasing liquid nitrogen exceeding the pressure which can be borne by the main liquid nitrogen pipeline;
the liquid nitrogen collecting assembly is communicated with the liquid nitrogen main pipeline and is used for collecting liquid nitrogen released by the safety valve in the liquid nitrogen main pipeline.
Optionally, the main liquid nitrogen pipeline is further provided with a second through hole, and the second through hole is located between the closed end of the main liquid nitrogen pipeline and the first through hole close to the closed end of the main liquid nitrogen pipeline;
the liquid nitrogen collecting assembly comprises a liquid nitrogen collecting tank and a liquid nitrogen collecting pipeline;
a third through hole is formed in the top of the liquid nitrogen collecting tank, and a first sealing plug is arranged on the third through hole;
one end of the liquid nitrogen collecting pipeline is communicated with the liquid nitrogen main pipeline through the second through hole, and one end, far away from the liquid nitrogen main pipeline, of the liquid nitrogen collecting pipeline penetrates through the third through hole and extends into the liquid nitrogen collecting tank.
Optionally, the main liquid nitrogen pipeline, the liquid nitrogen distribution pipeline, the liquid nitrogen conveying pipeline and the liquid nitrogen collection pipeline all include a first pipe shell and a second pipe shell arranged from inside to outside;
and a vacuum closed space is formed between the first pipe shell and the second pipe shell, and an insulating layer is arranged on the peripheral wall of the second pipe shell.
Optionally, a first flow regulating valve is arranged on the liquid nitrogen distribution pipeline, and a second flow regulating valve is arranged on the liquid nitrogen conveying pipeline;
and a first sealing ring is arranged at the joint of each first through hole and the liquid nitrogen distribution pipeline, a second sealing ring is arranged at the joint of the main liquid nitrogen pipeline and the liquid nitrogen conveying pipeline, and a second sealing plug is arranged on the liquid nitrogen outlet of each liquid nitrogen supply tank.
Optionally, the liquid nitrogen supply distribution system of the high accelerated life test box provided by the application further comprises a pipeline support assembly;
the pipeline supporting assembly comprises a supporting base, a supporting rod, a screw rod and a plurality of fixing pieces;
the supporting base is arranged on a fixed reference surface, the supporting rod is vertically arranged on the upper surface of the supporting base, the top of the supporting rod is provided with the fixing piece, a screw hole matched with the screw rod is formed in the rod body of the supporting rod, one end, penetrating through the screw hole, of the screw rod is connected with the fixing piece, and one end, far away from the fixing piece, of the screw rod is connected with a nut;
each fixing piece comprises a first arc-shaped fixing ring and a second arc-shaped fixing ring;
the open end of first arc retainer plate is provided with the draw-in groove, the open end of second retainer plate be provided with draw-in groove assorted fixture block, first arc retainer plate with form between the second arc retainer plate and be used for fixing liquid nitrogen trunk line liquid nitrogen distribution pipeline or liquid nitrogen pipeline's fourth through-hole.
Optionally, a roller is disposed at the bottom of the supporting base, and the roller is used for unlocking or locking the position of the supporting base relative to the fixed reference surface.
Optionally, the number of the first through holes is at least two;
the number of the liquid nitrogen supply tanks is larger than that of the first through holes on the main liquid nitrogen pipeline.
Optionally, the main liquid nitrogen pipeline, the liquid nitrogen distribution pipeline and the liquid nitrogen conveying pipeline are all seamless steel pipes.
The liquid nitrogen supply distribution system for the high-acceleration life test box is characterized in that the opposite end of the closed end of a main liquid nitrogen pipeline is communicated with a liquid nitrogen inlet of the high-acceleration life test box through a liquid nitrogen conveying pipeline, a plurality of first through holes are formed in the main liquid nitrogen pipeline, a plurality of liquid nitrogen supply tanks filled with liquid nitrogen are also arranged, and each first through hole is communicated with one liquid nitrogen supply tank through a liquid nitrogen distribution pipeline; in addition, a plurality of first through-holes and a plurality of liquid nitrogen supply tank on the liquid nitrogen main pipe for when liquid nitrogen in one of them liquid nitrogen supply tank is not enough to accomplish the HALT experiment, in time will open through the liquid nitrogen distribution pipeline of liquid nitrogen distribution and the liquid nitrogen distribution tank of first through-hole intercommunication, realized the continuous supply of HALT in the test process of HALT, and avoided the process of changing the liquid nitrogen supply tank to cause the emergence of the experimental out-of-tolerance phenomenon of HALT to appear, and then improved the accuracy of the experimental result of HALT.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a liquid nitrogen supply distribution system for a high accelerated life test cell according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a main liquid nitrogen conduit, a liquid nitrogen distribution conduit, a liquid nitrogen delivery conduit, and a liquid nitrogen collection conduit according to another embodiment of the present application;
FIG. 3 is a schematic view of a pipe support assembly according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of a fixing element according to another embodiment of the present application.
In the figure: 100. a main liquid nitrogen pipeline; 101. a first through hole; 102. a second through hole; 103. a first case; 104. a second case; 200. a liquid nitrogen distribution pipeline; 201. a second drop booster pump; 202. a first flow regulating valve; 300. a liquid nitrogen delivery pipe; 301. a first booster pump; 302. a second flow regulating valve; 400. a liquid nitrogen supply tank; 401. a liquid nitrogen outlet; 500. a high acceleration life test chamber; 501. a liquid nitrogen inlet; 600. a safety valve; 700. a liquid nitrogen collection assembly; 701. a liquid nitrogen collection tank; 702. a liquid nitrogen collection pipeline; 7011. a third through hole; 800. a conduit support assembly; 801. a support base; 8011. a roller; 802. a support bar; 8021. a screw hole; 803 a screw; 804. a fixing member; 8041. a first arcuate retainer ring; 8042. a second arc-shaped fixing ring; 8043. a card slot; 8044. a clamping block; 900. sealing the space; 1000. and (7) an insulating layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort also belong to the protection scope of the present application.
Referring to fig. 1 to 4, the present application provides a liquid nitrogen supply distribution system for a high accelerated life test box, including a main liquid nitrogen pipe 100, a plurality of liquid nitrogen distribution pipes 200, a liquid nitrogen delivery pipe 300, and a liquid nitrogen supply tank 400; specifically, one end of the main liquid nitrogen pipeline 100 is a closed end, the other end of the main liquid nitrogen pipeline 100 is communicated with one end of the liquid nitrogen conveying pipeline 300, one end, far away from the main liquid nitrogen pipeline 100, of the liquid nitrogen conveying pipeline 300 is used for being communicated with a liquid nitrogen inlet 501 of the high-acceleration life test box 500, and a first booster pump 301 is arranged on the liquid nitrogen conveying pipeline 300, wherein the first booster pump 301 is used for conveying liquid nitrogen in the main liquid nitrogen pipeline 100 to the high-acceleration life test box 500 sequentially through the liquid nitrogen conveying pipeline 300 and the liquid nitrogen inlet 501 of the high-acceleration life test box 500, and the liquid nitrogen entering the high-acceleration life test box 500 enables the temperature of a sample in the high-acceleration life test box 500 to be changed at the fastest speed; the main liquid nitrogen pipeline 100 is provided with a plurality of first through holes 101, wherein the main liquid nitrogen pipeline 100 is provided with the plurality of first through holes 101 so as to communicate with the plurality of liquid nitrogen supply tanks 400 through the liquid nitrogen distribution pipeline 200, and the plurality of liquid nitrogen supply tanks 400 can ensure that liquid nitrogen is continuously supplied into the high-acceleration life test box 500, so that the temperature of a sample in the high-acceleration life test box 500 can be changed at the fastest speed, and the accuracy of the result of the HALT test is improved.
Liquid nitrogen supply tank 400 has a plurality ofly, every liquid nitrogen supply tank 400 intussuseption is filled with the liquid nitrogen, liquid nitrogen outlet 401 has been seted up at the top of every liquid nitrogen supply tank 400 and the intercommunication has a liquid nitrogen distribution pipeline 200 on every liquid nitrogen outlet 401, the one end that liquid nitrogen outlet 401 was kept away from to every liquid nitrogen distribution pipeline 200 runs through the inside intercommunication of first through-hole 101 with liquid nitrogen trunk line 100, be provided with second booster pump 201 on every liquid nitrogen distribution pipeline 200, wherein, second booster pump 201 is used for following liquid nitrogen distribution pipeline 200 in proper order with the liquid nitrogen in the liquid nitrogen supply tank 400, first through-hole 101 is gone into in the liquid nitrogen trunk line 100.
A plurality of first through-holes 101 and a plurality of liquid nitrogen supply tank 400 on liquid nitrogen trunk line 100 in this application for when the liquid nitrogen in one of them liquid nitrogen supply tank 400 is not enough to accomplish the HALT experiment, in time will open the liquid nitrogen supply tank 400 that communicates with first through-hole 101 through liquid nitrogen distribution pipeline 200, the continuous supply of liquid nitrogen in the HALT test process has been realized, and the process of having avoided changing liquid nitrogen supply tank 400 causes the emergence of the experimental out-of-tolerance phenomenon of HALT to appear, and then the accuracy of the experimental result of HALT has been improved.
In some embodiments, the liquid nitrogen supply distribution system of the high accelerated life test cell provided herein further comprises a safety valve 600 and a liquid nitrogen collection assembly 700; specifically, the safety valve 600 is disposed on the main liquid nitrogen pipe 100 and is configured to detect liquid nitrogen pressure in the main liquid nitrogen pipe 100 and release liquid nitrogen exceeding a pressure that the main liquid nitrogen pipe 100 can bear; the safety valve 600 is a special valve in which a closing member is normally closed by an external force, and when the pressure of a medium in a device or a pipeline rises above a predetermined value, the medium pressure in the pipeline or the device is prevented from exceeding a predetermined value by discharging the medium to the outside of the system. On being used for liquid nitrogen trunk line 100 with relief valve 600 in this application, the pressure in the control liquid nitrogen trunk line 100 is no longer than the specified value, plays important guard action to personal safety and equipment operation.
The liquid nitrogen collecting assembly 700 is communicated with the main liquid nitrogen pipeline 100 and used for collecting liquid nitrogen in the main liquid nitrogen pipeline 100 released through the safety valve 600, wherein the liquid nitrogen collecting assembly 700 collects the liquid nitrogen which exceeds the pressure born by the main liquid nitrogen pipeline 100 and is discharged from the main liquid nitrogen pipeline 100, the collected liquid nitrogen can be used for HALT tests and other purposes, the waste of the liquid nitrogen is avoided, and the cost of the HALT test is reduced.
In some embodiments, a second through hole 102 is further formed in the main liquid nitrogen pipe 100, and the second through hole 102 is located between the closed end of the main liquid nitrogen pipe 100 and the first through hole 101 close to the closed end of the main liquid nitrogen pipe 100; the liquid nitrogen collecting assembly 700 comprises a liquid nitrogen collecting tank 701 and a liquid nitrogen collecting pipeline 702; specifically, a third through hole 7011 has been seted up at the top of liquid nitrogen collection tank 701, is provided with first sealing plug on the third through hole 7011, and wherein, first sealing plug is used for sealing third through hole 7011 on liquid nitrogen collection tank 701, can prevent that the liquid nitrogen of collecting in liquid nitrogen collection tank 701 from revealing. Specifically, after the liquid nitrogen collection is finished, the first sealing plug is plugged on the third through hole 7011, so that the liquid nitrogen collected in the liquid nitrogen collection tank 701 is prevented from leaking.
The one end and the 100 intercommunications of liquid nitrogen trunk line of liquid nitrogen collecting pipe 702, the one end that liquid nitrogen trunk line 100 was kept away from to liquid nitrogen collecting pipe 702 runs through third through hole 7011 and stretches into in the liquid nitrogen collecting tank 701, can detect when the pressure value that liquid nitrogen trunk line 100 can bear is surpassed in the liquid nitrogen trunk line 100 night when relief valve 600 like this, collect the liquid nitrogen that releases in the follow liquid nitrogen trunk line 100, avoided the waste of liquid nitrogen, improved the utilization ratio of liquid nitrogen.
In some embodiments, the main liquid nitrogen pipeline 100, the liquid nitrogen distribution pipeline 200, the liquid nitrogen delivery pipeline 300 and the liquid nitrogen collection pipeline 702 in the present application each include a first pipe shell 103 and a second pipe shell 104 arranged from inside to outside; specifically, a vacuum-filled sealed space 900 is formed between the first tube shell 103 and the second tube shell 104, and an insulating layer 1000 is disposed on the outer circumferential wall of the second tube shell 104, wherein the insulating layer 1000 may be made of polystyrene or polyurethane.
In the above embodiment, on the one hand, the vacuum filled in the sealed space 900 between the first tube shell 103 and the second tube shell 104 can perform the function of preserving the heat of the main liquid nitrogen pipeline 100, the liquid nitrogen distribution pipeline 200, the liquid nitrogen conveying pipeline 300 and the liquid nitrogen collecting pipeline 702; on the other hand, the heat insulation layer 1000 can further perform the heat insulation effect on the main liquid nitrogen pipeline 100, the liquid nitrogen distribution pipeline 200, the liquid nitrogen conveying pipeline 300 and the liquid nitrogen collection pipeline 702. That is to say, this application has realized the effect to the dual heat preservation of liquid nitrogen main pipe 100, liquid nitrogen distribution pipeline 200, liquid nitrogen conveying pipeline 300 and liquid nitrogen collecting pipeline 702 through being filled with vacuum and heat preservation 1000 in confined space 900, guarantees as far as possible that the temperature of the liquid nitrogen that passes through in proper order in liquid nitrogen main pipe 100, liquid nitrogen distribution pipeline 200, liquid nitrogen conveying pipeline 300 and liquid nitrogen collecting pipeline 702 does not change, guarantees the cooling effect of liquid nitrogen.
In some embodiments, the first flow regulating valve 202 is disposed on the liquid nitrogen distribution pipeline 100, and the second flow regulating valve 302 is disposed on the liquid nitrogen conveying pipeline 300, wherein the first flow regulating valve 202 and the second flow regulating valve 302 can not only control the on-off state of the liquid nitrogen supply, but also facilitate the real-time measurement of the liquid nitrogen supply, and facilitate the real-time grasp of the progress of the HALT test.
A first sealing ring is arranged at the joint of each first through hole 101 and the liquid nitrogen distribution pipeline 200, a second sealing ring is arranged at the joint of the main liquid nitrogen pipeline 100 and the liquid nitrogen conveying pipeline 300, and a second sealing plug is arranged on a liquid nitrogen outlet 401 of each liquid nitrogen supply tank 400, wherein the first sealing plug and the second sealing plug can be made of rubber or silica gel, so as to ensure the connection tightness of the first through hole 101 and the liquid nitrogen distribution pipeline 200 and the connection tightness of the main liquid nitrogen pipeline 100 and the liquid nitrogen conveying pipeline 300, avoid the leakage of liquid nitrogen at the pipeline joint, avoid the waste of liquid nitrogen and improve the utilization rate of liquid nitrogen; in addition, the first sealing plug and the second sealing plug also avoid that air with the temperature higher than that of liquid nitrogen outside enters the pipeline and exchanges heat with the liquid nitrogen due to air leakage at the pipeline joint, so that the temperature of the liquid nitrogen passing through the pipeline is increased, the purity of the liquid nitrogen is reduced, namely, the first sealing plug and the second sealing plug are arranged, the cooling effect and the purity of the liquid nitrogen are prevented from being reduced, and the effectiveness of utilizing the liquid nitrogen is improved.
In some embodiments, the liquid nitrogen supply distribution system of the high accelerated life test cell provided herein further comprises a pipe support assembly 800, wherein the pipe support assembly 800 may be used to support the main liquid nitrogen pipe 100, the liquid nitrogen distribution pipe 200, and the liquid nitrogen conveying pipe 300.
The pipe support assembly 800 comprises a support base 801, a support rod 802, a screw 803 and a plurality of fixing pieces 804; specifically, the supporting base 801 is disposed on a fixed reference surface, which may be a test table, and the fixed reference surface is not specifically limited herein. The vertical setting of bracing piece 802 is at the upper surface that supports base 801, and the top of bracing piece 802 is provided with a mounting 804, offer on the pole body of bracing piece 802 with screw 803 assorted screw 8021, screw 803 runs through the one end of screw 8021 is connected with mounting 804, and the one end that mounting 804 was kept away from to screw 803 is connected with the nut, and wherein, the nut is used for fixing screw 803 on bracing piece 802, ensures that fastener 804 stabilizes the centre gripping to the pipeline. Wherein, screw 8021 can be a plurality of, and a plurality of screw 8021 equidistant distribution is on the pole body of screw 803 for can fix a plurality of screw 803 on a bracing piece 802, and then play the effect of fixed a plurality of pipelines, improve pipeline supporting component 800's fixed efficiency.
Each fastener 804 includes a first arcuate retainer ring 8041 and a second arcuate retainer ring 8042; specifically, the open end of first arc-shaped retainer plate 8041 is provided with draw-in groove 8043, the open end of second arc-shaped retainer plate 8042 is provided with and draw-in groove 8043 assorted fixture block 8044, form the fourth through-hole that is used for fixed liquid nitrogen main pipe 100, liquid nitrogen distribution pipeline 200 or liquid nitrogen transfer pipe 300 between first arc-shaped retainer plate 8041 and the second arc-shaped retainer plate 8042, specifically, in the fixed in-process of pipeline, liquid nitrogen main pipe 100, liquid nitrogen distribution pipeline 200 or liquid nitrogen transfer pipe 300 are fixed in the fourth through-hole that forms between first arc-shaped retainer plate 8041 and second arc-shaped retainer plate 8042, ensure the experimental stability of HALT.
In some embodiments, a roller 8011 is disposed at the bottom of the supporting base 801, the roller 8011 is used to unlock or lock the position of the supporting base 801 relative to a fixed reference surface, and the roller 8011 is disposed so that the supporting base 801 can be moved according to the position of a pipe to be supported, which avoids the trouble of dragging by a person, thereby improving the convenience of using the pipe supporting assembly 800.
In some embodiments, the number of the first through holes 101 is at least two, each first through hole 101 is communicated with one liquid nitrogen supply tank 400 through the liquid nitrogen distribution pipeline 200, specifically, when the liquid nitrogen in one liquid nitrogen supply tank 400 is insufficient to complete the HALT test, the other liquid nitrogen supply tank 400 is immediately opened to supply the liquid nitrogen to the high accelerated life test box 500, and at this time, the liquid nitrogen supply tank 400 with the consumed liquid nitrogen can be replaced with the liquid nitrogen supply tank 400 filled with the liquid nitrogen, so that the continuous and stable performance of the HALT test is ensured.
The quantity of liquid nitrogen supply tank 400 is greater than the quantity of first through-hole 101 on liquid nitrogen main pipe 100, sets up like this and is being full of the liquid nitrogen supply tank 400 of liquid nitrogen for many reserves, and the liquid nitrogen supply tank 400 that is convenient for in time use is full of the liquid nitrogen changes the liquid nitrogen supply tank 400 that consumes and avoids causing the experimental out-of-tolerance phenomenon of HALT because of the process of changing liquid nitrogen supply tank 400 to improve the accuracy of the experimental result of HALT.
In some embodiments, the main liquid nitrogen pipeline 100, the liquid nitrogen distribution pipeline 200 and the liquid nitrogen conveying pipeline 300 in the application are seamless steel pipes, wherein the seamless steel pipes have the advantages of high pressure resistance, good toughness, long pipe sections and few interfaces, so that leakage of liquid nitrogen is avoided in the process of supplying the liquid nitrogen to the high-acceleration life test box 500, and the liquid nitrogen in the liquid nitrogen supply tank 400 is fully utilized.
The specific use principle of the liquid nitrogen supply distribution system for the high-accelerated life test box provided by the application is as follows:
1) Before the HALT test begins, pull out the first sealing plug on the third through hole 7011 and the second sealing plug on the liquid nitrogen export 401 on the liquid nitrogen supply tank 400, communicate the one end of liquid nitrogen transfer pipe 300 with the liquid nitrogen import 501 of high accelerated life test box 500, the other end of liquid nitrogen transfer pipe 300 communicates with the open end of liquid nitrogen trunk line 100, every first through hole 101 on liquid nitrogen trunk line 100 communicates with the one end of liquid nitrogen distribution pipe 200, the other end of liquid nitrogen distribution pipe 200 communicates with the third through hole 7011 on the liquid nitrogen supply tank 400, communicate the one end of liquid nitrogen collecting pipe 702 with liquid nitrogen trunk line 100 through second through hole 102, the one end that liquid nitrogen trunk line 100 was kept away from to liquid nitrogen collecting pipe 702 communicates with liquid nitrogen collecting tank 701 through third through hole 7011.
2) The first booster pump 301 and the second booster pump 201 are opened, the first flow regulating valve 202 on one of the liquid nitrogen distribution pipelines 200 is opened, the amount of liquid nitrogen discharged from the liquid nitrogen supply tank 400 is measured in real time through the first flow regulating valve 202, so that the amount of the residual liquid nitrogen in the liquid nitrogen supply tank 400 is judged, when the liquid nitrogen in one of the liquid nitrogen supply tanks 400 is used up, the first flow regulating valve 202 on the liquid nitrogen distribution pipeline 200 communicated with the other liquid nitrogen supply tank 400 is opened, at the moment, the liquid nitrogen supply tank 400 which is used up by the liquid nitrogen can be replaced in time, the continuity of liquid nitrogen supply in the HALT test process is ensured, and the accuracy of the test result is ensured.
3) In the HALT test process, the safety valve 600 arranged on the main liquid nitrogen pipeline 100 detects the liquid nitrogen pressure in the main liquid nitrogen pipeline 100 in real time, when the pressure in the main liquid nitrogen pipeline 100 exceeds the pressure value that the main liquid nitrogen pipeline 100 can bear, the liquid nitrogen in the main liquid nitrogen pipeline 100 sequentially enters the liquid nitrogen collecting tank 701 through the third through hole 7011 at the tops of the liquid nitrogen collecting pipeline 702 and the liquid nitrogen collecting tank 701 through the safety valve 600, and is collected through the liquid nitrogen collecting tank 701.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. A liquid nitrogen supply distribution system for a high accelerated life test chamber is characterized by comprising a liquid nitrogen main pipeline (100), a plurality of liquid nitrogen distribution pipelines (200), a liquid nitrogen conveying pipeline (300) and a liquid nitrogen supply tank (400);
one end of the main liquid nitrogen pipeline (100) is a closed end, the other end of the main liquid nitrogen pipeline (100) is communicated with one end of the liquid nitrogen conveying pipeline (300), one end, far away from the main liquid nitrogen pipeline (100), of the liquid nitrogen conveying pipeline (300) is used for being communicated with a liquid nitrogen inlet (501) of the high-accelerated life test box (500), and a first booster pump (301) is arranged on the liquid nitrogen conveying pipeline (300); a plurality of first through holes (101) are formed in the main liquid nitrogen pipeline (100);
liquid nitrogen supply tank (400) have a plurality ofly, every liquid nitrogen supply tank (400) intussuseption is filled with the liquid nitrogen, every liquid nitrogen outlet (401) and every have been seted up to the top of liquid nitrogen supply tank (400) the intercommunication has one on liquid nitrogen outlet (401) liquid nitrogen distribution pipeline (200), every liquid nitrogen distribution pipeline (200) are kept away from the one end of liquid nitrogen outlet (401) is run through first through-hole (101) with the inside intercommunication of liquid nitrogen trunk line (100), every be provided with second booster pump (201) on liquid nitrogen distribution pipeline (200).
2. The liquid nitrogen supply distribution system for a high accelerated life test cell of claim 1, further comprising a safety valve (600) and a liquid nitrogen collection assembly (700);
the safety valve (600) is arranged on the main liquid nitrogen pipeline (100) and is used for detecting the pressure of liquid nitrogen in the main liquid nitrogen pipeline (100) and releasing liquid nitrogen exceeding the pressure capable of being borne by the main liquid nitrogen pipeline (100);
the liquid nitrogen collecting assembly (700) is communicated with the main liquid nitrogen pipeline (100) and is used for collecting the liquid nitrogen in the main liquid nitrogen pipeline (100) released by the safety valve (600).
3. The liquid nitrogen supply distribution system for the high-accelerated life test box according to claim 2, wherein a second through hole (102) is further formed in the main liquid nitrogen pipe (100), and the second through hole (102) is located between the closed end of the main liquid nitrogen pipe (100) and the first through hole (101) close to the closed end of the main liquid nitrogen pipe (100);
the liquid nitrogen collecting assembly (700) comprises a liquid nitrogen collecting tank (701) and a liquid nitrogen collecting pipeline (702);
a third through hole (7011) is formed in the top of the liquid nitrogen collecting tank (701), and a first sealing plug is arranged on the third through hole (7011);
one end of the liquid nitrogen collecting pipeline (702) is communicated with the liquid nitrogen main pipeline (100) through the second through hole (102), and one end, far away from the liquid nitrogen main pipeline (100), of the liquid nitrogen collecting pipeline (702) penetrates through the third through hole (7011) and stretches into the liquid nitrogen collecting tank (701).
4. The liquid nitrogen supply distribution system for the high accelerated life test chamber according to claim 3, wherein the main liquid nitrogen pipe (100), the liquid nitrogen distribution pipe (200), the liquid nitrogen delivery pipe (300) and the liquid nitrogen collection pipe (702) each comprise a first tube shell (103) and a second tube shell (104) arranged from inside to outside;
a sealed space (900) filled with vacuum is formed between the first pipe shell (103) and the second pipe shell (104), and an insulating layer (1000) is arranged on the peripheral wall of the second pipe shell (104).
5. The liquid nitrogen supply distribution system for the high accelerated life test chamber according to claim 1, wherein a first flow regulating valve (202) is provided on the liquid nitrogen distribution pipe (200), and a second flow regulating valve (302) is provided on the liquid nitrogen delivery pipe (300);
a first sealing ring is arranged at the joint of each first through hole (101) and the liquid nitrogen distribution pipeline (200), a second sealing ring is arranged at the joint of the main liquid nitrogen pipeline (100) and the liquid nitrogen conveying pipeline (300), and a second sealing plug is arranged on the liquid nitrogen outlet (401) on each liquid nitrogen supply tank (400).
6. The liquid nitrogen supply distribution system for a high accelerated life test cell of claim 1, further comprising a pipe support assembly (800);
the pipe support assembly (800) comprises a support base (801), a support rod (802), a screw (803) and a plurality of fixing pieces (804);
the supporting base (801) is arranged on a fixed reference surface, the supporting rod (802) is vertically arranged on the upper surface of the supporting base (801), the top of the supporting rod (802) is provided with a fixing piece (804), a screw hole (8021) matched with the screw rod (803) is formed in the rod body of the supporting rod (802), one end, penetrating through the screw hole (8021), of the screw rod (803) is connected with the fixing piece (804), and one end, far away from the fixing piece (804), of the screw rod (803) is connected with a nut;
each of the securing members (804) comprises a first arcuate securing ring (8041) and a second arcuate securing ring (8042);
the open end of first arc retainer plate (8041) is provided with draw-in groove (8043), the open end of second arc retainer plate (8042) be provided with draw-in groove (8043) assorted fixture block (8044), first arc retainer plate (8041) with form between second arc retainer plate (8042) and be used for fixing liquid nitrogen trunk line (100), liquid nitrogen distribution pipeline (200) or the fourth through-hole of liquid nitrogen pipeline (300).
7. The liquid nitrogen supply distribution system for the high accelerated life test chamber of claim 6, characterized in that a roller (8011) is provided at the bottom of the supporting base (801), and the roller (8011) is used for unlocking or locking the position of the supporting base (801) relative to the fixed reference surface.
8. The liquid nitrogen supply distribution system for a high accelerated life test chamber of claim 1, wherein the number of the first through holes (101) is at least two;
the number of the liquid nitrogen supply tanks (400) is larger than that of the first through holes (101) on the main liquid nitrogen pipeline (100).
9. The liquid nitrogen supply distribution system for a high accelerated life test cell according to any one of claims 1 to 8, wherein the main liquid nitrogen pipe (100), the liquid nitrogen distribution pipe (200) and the liquid nitrogen delivery pipe (300) are seamless steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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