CN107587999A - A kind of ultra-low temperature testing device and method - Google Patents
A kind of ultra-low temperature testing device and method Download PDFInfo
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- CN107587999A CN107587999A CN201710805429.1A CN201710805429A CN107587999A CN 107587999 A CN107587999 A CN 107587999A CN 201710805429 A CN201710805429 A CN 201710805429A CN 107587999 A CN107587999 A CN 107587999A
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Abstract
The invention discloses a kind of ultra-low temperature testing device and method, belongs to ultra-low temperature pump experimental rig field.The ultra-low temperature testing device includes circulating tank and test tank, flange ring is provided with the top of test tank, the first liquid phase valve group and the first gas phase valve group are provided with circulating tank, second liquid phase valve group and the second gas phase valve group are provided with test tank, liquid nitrogen is injected into circulating tank by the first liquid in-out valve, to be filled to circulating tank progress precooling and liquid nitrogen, liquid nitrogen is injected into test tank by the second liquid in-out valve, to be filled to test tank progress precooling and liquid nitrogen.The structure of ultra-low temperature testing device is simple, it is and easily operated, and tank deck liquid feed valve, tank bottom liquid in-out valve are respectively arranged with the top and bottom of circulating tank, so as to which when carrying out precooling liquid nitrogen can be injected by two valves simultaneously, so as to carry out precooling simultaneously from the top and bottom of circulating tank, reduce excessive temperature differentials at the top and bottom of circulating tank influences to caused by circulating tank.
Description
Technical field
The present invention relates to ultra-low temperature pump experimental rig field, more particularly to a kind of ultra-low temperature testing device and method.
Background technology
Ultralow temperature immersed pump is a kind of for LNG (English：Liquefied Natural Gas, Chinese：Liquefied natural gas)
The power-equipment of conveying.
Because ultralow temperature immersed pump is used to convey the inflammable medium of this kind of low temperature of LNG, therefore to the resistance to low temperature of this kind of pump
And air-tightness, electrical security have high requirement.In order to ensure the normal work of ultralow temperature immersed pump, using preceding needing
Performance test is carried out to ultralow temperature immersed pump.The ultra-low temperature testing device structure tested at present ultralow temperature immersed pump is answered
It is miscellaneous, it is inconvenient for use.
The content of the invention
In order to solve the problems, such as that existing ultra-low temperature testing device is complicated, the embodiments of the invention provide a kind of ultralow
Warm experimental rig and method.The technical scheme is as follows：
On the one hand, the embodiments of the invention provide a kind of ultra-low temperature testing device, the ultra-low temperature testing device includes following
Ring tank and test tank, the flange ring for inserting ultralow temperature immersed pump to be tested is provided with the top of the test tank, it is described
The first liquid phase valve group and the first gas phase valve group are provided with circulating tank, second liquid phase valve group and second are provided with the test tank
Gas phase valve group, the first liquid phase valve group include tank deck liquid feed valve, tank bottom liquid in-out valve, the first liquid in-out valve, and the tank deck enters
The A mouths of liquid valve connect with the top of the circulating tank, and the A mouths of the B mouths of the tank deck liquid feed valve and the first liquid in-out valve connect
Logical, the A mouths of the tank bottom liquid in-out valve connect with the bottom of the circulating tank, the B mouths of the tank bottom liquid in-out valve and described the
The A mouths connection of one liquid in-out valve, the first gas phase valve group includes the first gas valve, the first blow down valve, the second gas valve, described
The A mouths of first gas valve connect with the top of the circulating tank, the A of the B mouths of first gas valve and second gas valve
Mouth connection, the A mouths of first blow down valve connect with the B mouths of first gas valve, and the second liquid phase valve group includes Chi Ding
Liquid feed valve, bottom of pond liquid in-out valve, the second liquid in-out valve, the A mouths of pond top liquid feed valve connect with the top of the test tank, institute
The B mouths for stating pond top liquid feed valve connect with the A mouths of the second liquid in-out valve, A mouths and the test of the bottom of pond liquid in-out valve
The bottom connection of tank, the B mouths of the bottom of pond liquid in-out valve connect with the A mouths of the second liquid in-out valve, second gas valve
Group includes the 3rd gas valve, the second blow down valve, the 4th gas valve, the A mouths of the 3rd gas valve and the top of the test tank
Connection, the B mouths of the 3rd gas valve connect with the A mouths of the 4th gas valve, the A mouths of second blow down valve and described the
The B mouths connection of three gas valves, is connected, the side of the circulating tank between the circulating tank and the test tank by medium delivery pipe
Circulation interface is provided with wall.
Preferably, the ultra-low temperature testing device also includes the first stop valve and the second stop valve, first stop valve
A mouths connected with the bottom of the circulating tank, the B mouths of first stop valve connect with the B mouths of second stop valve, described
The A mouths of second stop valve connect with the bottom of the test tank.
Preferably, one end connected with the circulating tank of the medium delivery pipe is located at the lower section of the circulation interface.
Further, first valve is provided with the side wall of the circulating tank, the medium delivery pipe passes through described first
Root valve connects with the circulating tank.
Preferably, the first safety valve is provided with the top of the circulating tank.
Preferably, the second safety valve is provided with the top of the test tank.
Alternatively, the ultra-low temperature testing device also includes the 3rd safety valve, and the 3rd safety valve enters with described first
The A mouths connection of liquid valve.
Preferably, the ultra-low temperature testing device also includes the 4th safety valve, and the 4th safety valve enters with described second
The A mouths connection of liquid valve.
Further, the circulation interface includes second valve.
On the other hand, the embodiment of the present invention additionally provides a kind of cryogenic testing method, and methods described is applied to foregoing
Any ultra-low temperature testing device, methods described include：
Inerting drying process is carried out, the inerting drying process includes closing in the first liquid phase valve group and second liquid phase valve group
All valves, open the first gas valve, the first blow down valve, the second gas valve, the second blow down valve, by first blow down valve to
Nitrogen is passed through in the ultra-low temperature testing device；
Precooling treatment is carried out to the ultra-low temperature testing device, the precooling treatment includes closing the first gas phase valve group and institute
State valve all in second liquid phase valve group, open tank deck liquid feed valve, tank bottom liquid in-out valve, the first liquid in-out valve, the 3rd gas valve,
4th gas valve, liquid nitrogen, or the precooling treatment are injected into the ultra-low temperature testing device from the first liquid in-out valve
Including valve all in all valves in the second gas phase valve group of closing and the first liquid phase valve group, pond top liquid feed valve, pond are opened
Bottom liquid in-out valve, the second liquid in-out valve, the first gas valve, the second gas valve, from the second liquid in-out valve to the ultralow temperature
Injection liquid nitrogen in experimental rig；
To the ultra-low temperature testing device fill processing, it is described to fill processing and include closing the first gas phase valve group
With all valves in the second liquid phase valve group, the tank deck liquid feed valve is closed, opens the tank bottom liquid in-out valve, described
One liquid in-out valve, the 3rd gas valve and the 4th gas valve, from the first liquid in-out valve to the cryogenic testing
Injection liquid nitrogen in device.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：By setting circulating tank and test tank, follow
Connected between ring tank and test tank by medium delivery pipe, flange ring is provided with the top of test tank, to be tested can surpassed
Inside low temperature immersed pump insertion test tank, and be fixedly connected with flange ring, by set on circulating tank the first liquid phase valve group and
First gas phase valve group, second liquid phase valve group and the second gas phase valve group are set in test tank, wherein the first liquid phase valve group includes tank
Liquid feed valve, tank bottom liquid in-out valve, the first liquid in-out valve are pushed up, the first gas phase valve group includes the first gas valve, the first blow down valve, second
Gas valve, second liquid phase valve group include pond top liquid feed valve, bottom of pond liquid in-out valve, the second liquid in-out valve, and the second gas phase valve group includes
3rd gas valve, the second blow down valve, the 4th gas valve, so as to before being tested, first close the first liquid phase valve group and
All valves in two liquid phase valve groups, the first gas valve, the first blow down valve, the second blow down valve, the 4th gas valve are opened, passes through first
Blow down valve is passed through dry nitrogen into circulating tank, so as to discharge circulating tank and the oxygen in test tank.Then closing is passed through again
All valves in first gas phase valve group and the second gas phase valve group, open all in the first liquid phase valve group and second liquid phase valve group
Valve, liquid nitrogen is injected into circulating tank by the first liquid in-out valve, to be filled to circulating tank progress precooling and liquid nitrogen,
Liquid nitrogen is injected into test tank by the second liquid in-out valve, to be filled to test tank progress precooling and liquid nitrogen.It is super
The structure of cryogenic test equipment is simple, and easily operated, and tank deck liquid feed valve, tank are respectively arranged with the top and bottom of circulating tank
Bottom liquid in-out valve, so as to which when carrying out precooling liquid nitrogen can be injected by two valves simultaneously, so as to from the top of circulating tank with
Bottom carries out precooling simultaneously, and reduce excessive temperature differentials at the top and bottom of circulating tank influences to caused by circulating tank.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structure chart of ultra-low temperature testing device provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of cryogenic testing method provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of structure chart of ultra-low temperature testing device provided in an embodiment of the present invention, as shown in figure 1, the ultralow temperature
Experimental rig includes circulating tank 10 and test tank 20.The top of test tank 20 is provided with for inserting the latent liquid of ultralow temperature to be tested
The flange ring 21 of pump.The first liquid phase valve group 30 and the first gas phase valve group 40 are provided with circulating tank 10, is provided with test tank 20
The gas phase valve group 60 of second liquid phase valve group 50 and second.
First liquid phase valve group 30 includes tank deck liquid feed valve 31, tank bottom liquid in-out valve 32, the first liquid in-out valve 33.
Wherein, the A mouths of tank deck liquid feed valve 31 connect with the top of circulating tank 10, and the B mouths of tank deck liquid feed valve 31 enter with first
The A mouths connection of liquid valve 33, the A mouths of tank bottom liquid in-out valve 32 connect with the bottom of circulating tank 10, the B mouths of tank bottom liquid in-out valve 32
Connected with the A mouths of the first liquid in-out valve 33.
First gas phase valve group 40 includes the first gas valve 41, the first blow down valve 42, the second gas valve 43.
Wherein, the A mouths of the first gas valve 41 connect with the top of circulating tank 10, the B mouths and the second gas of the first gas valve 41
The A mouths connection of phase valve 43, the A mouths of the first blow down valve 42 connect with the B mouths of the first gas valve 41.
Second liquid phase valve group 50 includes pond top liquid feed valve 51, bottom of pond liquid in-out valve 52, the second liquid in-out valve 53.
Wherein, the A mouths of pond top liquid feed valve 51 connect with the top of test tank 20, and the B mouths of pond top liquid feed valve 51 enter with second
The A mouths connection of liquid valve 53, the A mouths of bottom of pond liquid in-out valve 52 connect with the bottom of test tank 20, the B mouths of bottom of pond liquid in-out valve 52
Connected with the A mouths of the second liquid in-out valve 53.
Second gas phase valve group 60 includes the 3rd gas valve 61, the second blow down valve 62, the 4th gas valve 63.
Wherein, the A mouths of the 3rd gas valve 61 connect with the top of test tank 20, the B mouths and the 4th gas of the 3rd gas valve 61
The A mouths connection of phase valve 63, the A mouths of the second blow down valve 62 connect with the B mouths of the 3rd gas valve 61.
Connected between circulating tank 10 and test tank 20 by medium delivery pipe 1020, be provided with and follow in the side wall of circulating tank 10
Ring interface 11.
The embodiment of the present invention is connected by setting circulating tank and test tank between circulating tank and test tank by medium delivery pipe
It is logical, flange ring is provided with the top of test tank, ultralow temperature immersed pump to be tested can be inserted inside test tank, and and flange
Ring is fixedly connected, and by setting the first liquid phase valve group and the first gas phase valve group on circulating tank, the second liquid is set in test tank
Phase valve group and the second gas phase valve group, wherein the first liquid phase valve group includes tank deck liquid feed valve, tank bottom liquid in-out valve, the first liquid in-out
Valve, the first gas phase valve group include the first gas valve, the first blow down valve, the second gas valve, and second liquid phase valve group includes pond jacking liquid
Valve, bottom of pond liquid in-out valve, the second liquid in-out valve, the second gas phase valve group include the 3rd gas valve, the second blow down valve, the 4th gas phase
Valve, so as to before being tested, first close all valves in the first liquid phase valve group and second liquid phase valve group, open the first gas
Phase valve, the first blow down valve, the second blow down valve, the 4th gas valve, dry nitrogen is passed through by the first blow down valve into circulating tank,
So as to discharge circulating tank and the oxygen in test tank.Then again by closing the institute in the first gas phase valve group and the second gas phase valve group
There is valve, open all valves in the first liquid phase valve group and second liquid phase valve group, injected by the first liquid in-out valve into circulating tank
Liquid nitrogen, to be filled to circulating tank progress precooling and liquid nitrogen, liquid is injected into test tank by the second liquid in-out valve
State nitrogen, to be filled to test tank progress precooling and liquid nitrogen.The structure of ultra-low temperature testing device is simple, and is easy to grasp
Make, and tank deck liquid feed valve, tank bottom liquid in-out valve are respectively arranged with the top and bottom of circulating tank, so as to can be with when carrying out precooling
Liquid nitrogen is injected by two valves simultaneously, so as to carry out precooling simultaneously from the top and bottom of circulating tank, is reduced at the top of circulating tank
Influenceed with bottom excessive temperature differentials to caused by circulating tank.
As shown in figure 1, the top of test tank 20 is provided with flange ring 21, when being tested, can dive ultralow temperature liquid
Pump is inserted into inside test tank 20, and ultralow temperature immersed pump is fixedly connected on flange ring 21, ultralow temperature immersed pump and test
Sealed between tank 20, avoid the leakage of test(ing) medium.
As shown in figure 1, the ultra-low temperature testing device can also include the first stop valve 81 and the second stop valve 82, first section
Only the A mouths of valve 81 connect with the bottom of circulating tank 10, and the B mouths of the first stop valve 81 connect with the B mouths of the second stop valve 82, and second
The A mouths of stop valve 82 connect with the bottom of test tank 20.So as to terminate test when, by the first stop valve 81 and second section
Only valve 82 is all opened, and opens the 3rd gas valve 61, the second blow down valve 62, is passed through by the second blow down valve 62 into test tank 20
Nitrogen, the liquid nitrogen in test tank 20 is expelled back into circulating tank 10, completes the recovery to liquid nitrogen.
Preferably, first valve 102 can be provided with the side wall of circulating tank 10, medium delivery pipe 1020 passes through first
Valve 102 connects with circulating tank 10.Set first valve 102 can be in circulating tank 10 filled with liquid in the side wall of circulating tank 10
Nitrogen, and ultra-low temperature testing device need carry out emergency maintenance when, first valve 102 can be closed, just like that medium delivery pipe
1020 disconnect with first valve 102.
In addition, circulation interface 11 can include second valve 101, the A mouths of second valve 101 can connect with circulation interface 11
It is logical, when being tested, the liquid outlet of ultralow temperature immersed pump to be tested can be connected with the B mouths of second valve 101, so as to
Loop can be formed between circulating tank 10 and test tank 20.In the liquid outlet and second valve 101 of connection ultralow temperature immersed pump
B mouths when, can be with connection traffic regulating valve 1022, to adjust between the B mouths of the liquid outlet of ultralow temperature immersed pump and second valve 101
Save the flow of the liquid outlet of ultralow temperature immersed pump.
Preferably, one end connected with circulating tank 10 of medium delivery pipe 1020 can be located at the lower section of circulation interface 11.
, so can be in order to which liquid nitrogen be by medium delivery pipe specifically as shown in figure 1, first valve 102 is arranged on the lower section of second valve 101
1020 enter in test tank 20.
Gate valve 1021 can be provided with medium delivery pipe 1020, it is to be tested in order to be measured by controlling opening of valve
The net positive suction head of ultralow temperature immersed pump.
As shown in figure 1, the top of circulating tank 10 can be provided with the first safety valve 71.Due to the part in circulating tank 10
Liquid nitrogen can gasify, and cause the pressure in circulating tank 10 to increase, and the first safety valve 71 can be led when pressure is excessive in circulating tank 10
It is logical, timely discharge part nitrogen, reduce the pressure in circulating tank 10, it is ensured that safety.
In addition, the top of test tank 20 can be provided with the second safety valve 72.Second safety valve 72 can be in test tank 20
Turned on when internal pressure is excessive, timely discharge part nitrogen, reduce the pressure in test tank 20, it is ensured that safety.
Preferably, ultra-low temperature testing device can also include the 3rd safety valve 34, the 3rd safety valve 34 and the first liquid in-out
The A mouths connection of valve 33.Due to when being passed through liquid nitrogen into circulating tank 10, being possible to the phenomenon to freeze occur in pipeline, so as to make
Into the blocking of pipeline.After pipeline blockage, the liquid nitrogen in pipeline can gradually gasify, and cause pipeline inner pressure to increase, and pass through setting
3rd safety valve 34 can be turned on when pipeline inner pressure is excessive, and the nitrogen in pipeline is discharged from the B mouths of the 3rd safety valve 34,
It ensure that the safety of ultra-low temperature testing device.
Ultra-low temperature testing device can also include the A of the 4th safety valve 54, the 4th safety valve 54 and the second liquid in-out valve 53
Mouth connection.Due to when being passed through liquid nitrogen into test tank 20, being also possible to the phenomenon to freeze occur in pipeline, so as to cause pipeline
Blocking.After pipeline blockage, the liquid nitrogen in pipeline can gradually gasify, and cause pipeline inner pressure to increase, by setting the 4th peace
Full valve 54 can be turned on when pipeline inner pressure is excessive, and the nitrogen in pipeline is discharged from the B mouths of the 4th safety valve 54, it is ensured that
The safety of ultra-low temperature testing device.
In addition, the A mouths of the first blow down valve 42 can also be communicated with a safety valve, so may insure to connect the first gas phase
The safety of the pipeline of valve group 40.Correspondingly, the A mouths of the second blow down valve 62 can also be communicated with a safety valve.
Preferably, pressure gauge 103 is also provided with circulating tank 10, to measure the pressure in circulating tank 10, it is ensured that examination
The safety tested.
In addition, pressure gauge can also be provided with test tank 20.Temperature is also provided with circulating tank 10 and test tank 20
Degree meter, to measure the temperature inside ultra-low temperature testing device.
Fig. 2 is a kind of flow chart of cryogenic testing method provided in an embodiment of the present invention, and this method is applied to shown in Fig. 1
Ultra-low temperature testing device, before being tested, ultralow temperature immersed pump has been arranged in test tank.As shown in Fig. 2 the party
Method includes：
S11：Carry out inerting drying process.
Wherein, inerting drying process includes closing valve all in the first liquid phase valve group and second liquid phase valve group, opens the
One gas valve, the first blow down valve, the second gas valve, the second blow down valve, led to by the first blow down valve into ultra-low temperature testing device
Enter nitrogen.
Specifically, the gas outlet of nitrogen cylinder can be connected with nitrogen drier, then by the outlet of nitrogen drier and the
The B mouths connection of one blow down valve, nitrogen is passed through into ultra-low temperature testing device, and progress oxygen is dense at the B mouths of the second blow down valve
Degree detection (can use hand-held oxygen instrument measure), when being passed through nitrogen, the pressure of nitrogen cylinder can be adjusted to 0.8~
1.0MPa, until when the oxygen concentration at the B mouths of the second blow down valve is less than 2%, the second blow down valve, the second gas valve are first closed,
Turn off nitrogen cylinder, the first blow down valve, the first gas valve.
S12：Precooling treatment is carried out to ultra-low temperature testing device.
Specifically, precooling treatment includes closing valve all in the first gas phase valve group and second liquid phase valve group, opens tank deck
Liquid feed valve, tank bottom liquid in-out valve, the first liquid in-out valve, the 3rd gas valve, the 4th gas valve, from the first liquid in-out valve to ultralow temperature
Injection liquid nitrogen in experimental rig.
Specifically, liquid nitrogen can be filled to the B mouths that flexible pipe is connected to the first liquid in-out valve, noted into circulating tank and test tank
Enter liquid nitrogen.
Before precooling treatment is carried out, the first gas valve, the second gas valve, the 3rd gas valve, the 4th gas can also be opened
Phase valve, to reduce the pressure in ultra-low temperature testing device, when pressure drops to below 0.2MPa, close the first gas valve, the
Two gas valves, the 3rd gas valve, the 4th gas valve, to be ready for precooling treatment.Can be to circulation during injecting liquid nitrogen
Temperature survey is carried out in tank and test tank, makes the speed control of Wen Duxiajiang in circulating tank and test tank in 10~12 DEG C/h,
Injection process is gentle, avoids the pressure in circulating tank and test tank from increasing suddenly.During liquid nitrogen is injected, when circulating tank or
When pressure in test tank is excessive (such as can be the setting value of the first safety valve in previous embodiment or second safety valve
90%) the first gas valve, the second gas valve, the 3rd gas valve, the 4th gas valve, can be opened, reduces circulating tank and test tank
Interior pressure.
In addition, precooling treatment can also include closing in valve all in the second gas phase valve group and the first liquid phase valve group owning
Valve, open pond top liquid feed valve, bottom of pond liquid in-out valve, the second liquid in-out valve, the first gas valve, the second gas valve, entered by second
Liquid valve injects liquid nitrogen into ultra-low temperature testing device.
In precooling, liquid nitrogen is filled into flexible pipe and is alternately connected to the B mouths of the second liquid in-out valve, from the second liquid in-out valve to super
Liquid nitrogen is passed through in cryogenic test equipment.
It is preferred that alternately through the first liquid in-out valve and the second liquid in-out valve, it can so make the temperature difference of circulating tank and test tank
It is smaller.When the pressure in circulating tank and test tank almost no longer increases, stopping is passed through liquid nitrogen, terminates precooling treatment.
S13：Ultra-low temperature testing device is carried out to fill processing.
All valves that processing includes closing in the first gas phase valve group and second liquid phase valve group are filled, close tank deck feed liquor
Valve, tank bottom liquid in-out valve, the first liquid in-out valve, the 3rd gas valve and the 4th gas valve are opened, from the first liquid in-out valve to ultralow
Injection liquid nitrogen in warm experimental rig.
After precooling treatment is completed, liquid nitrogen is injected into circulating tank by the first liquid in-out valve, during liquid nitrogen is injected,
When circulating tank and larger test pressure inside the tank, the first gas valve, the second gas valve, the 3rd gas valve, the 4th gas can be opened
Phase valve, the pressure in circulating tank and test tank is reduced, inject during liquid nitrogen and pressure is maintained into below 0.2MPa.In circulating tank
Stop filling processing when interior liquid level rises to the 85%~90% of the height of circulating tank, close tank bottom liquid in-out valve and first and enter
Liquid valve, disconnect liquid nitrogen and fill flexible pipe.
, it is necessary to be preserved to the liquid nitrogen of ultra-low temperature testing device and its inside after completion fills processing, preserving
Cheng Zhong, the pressure in circulating tank and test tank can be detected, can be by opening the first gas phase when pressure is in more than 0.5MPa
Valve group and the second gas phase valve group, the pressure in circulating tank and test tank is reduced, can be by opening when pressure is in below 0.5MPa
Open the first gas phase valve group and the second gas phase valve group be passed through nitrogen into circulating tank and test tank, to be pressurized, make circulating tank and
Pressure in test tank maintains 0.5MPa.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of ultra-low temperature testing device, it is characterised in that the ultra-low temperature testing device includes circulating tank (10) and test tank
(20) flange ring (21) for inserting ultralow temperature immersed pump to be tested, is provided with the top of the test tank (20), it is described
The first liquid phase valve group (30) and the first gas phase valve group (40) are provided with circulating tank (10), is provided with the test tank (20)
Two liquid phase valve groups (50) and the second gas phase valve group (60),
The first liquid phase valve group (30) includes tank deck liquid feed valve (31), tank bottom liquid in-out valve (32), the first liquid in-out valve (33),
The A mouths of the tank deck liquid feed valve (31) connect with the top of the circulating tank (10), the B mouths of the tank deck liquid feed valve (31) and institute
The A mouths connection of the first liquid in-out valve (33) is stated, the A mouths of the tank bottom liquid in-out valve (32) connect with the bottom of the circulating tank (10)
Logical, the B mouths of the tank bottom liquid in-out valve (32) connect with the A mouths of the first liquid in-out valve (33),
The first gas phase valve group (40) includes the first gas valve (41), the first blow down valve (42), the second gas valve (43), described
The A mouths of first gas valve (41) connect with the top of the circulating tank (10), the B mouths of first gas valve (41) and described the
The A mouths connection of two gas valves (43), the A mouths of first blow down valve (42) connect with the B mouths of first gas valve (41),
The second liquid phase valve group (50) includes pond top liquid feed valve (51), bottom of pond liquid in-out valve (52), the second liquid in-out valve (53),
The A mouths of the pond top liquid feed valve (51) connect with the top of the test tank (20), the B mouths of the pond top liquid feed valve (51) and institute
The A mouths connection of the second liquid in-out valve (53) is stated, the A mouths of the bottom of pond liquid in-out valve (52) connect with the bottom of the test tank (20)
Logical, the B mouths of the bottom of pond liquid in-out valve (52) connect with the A mouths of the second liquid in-out valve (53),
The second gas phase valve group (60) includes the 3rd gas valve (61), the second blow down valve (62), the 4th gas valve (63), described
The A mouths of 3rd gas valve (61) connect with the top of the test tank (20), the B mouths of the 3rd gas valve (61) and described the
The A mouths connection of four gas valves (63), the A mouths of second blow down valve (62) connect with the B mouths of the 3rd gas valve (61),
Connected between the circulating tank (10) and the test tank (20) by medium delivery pipe (1020), the circulating tank (10)
Side wall on be provided with circulation interface (11).
2. ultra-low temperature testing device according to claim 1, it is characterised in that the ultra-low temperature testing device also includes the
One stop valve (81) and the second stop valve (82), the A mouths of first stop valve (81) connect with the bottom of the circulating tank (10)
Logical, the B mouths of first stop valve (81) connect with the B mouths of second stop valve (82), the A of second stop valve (82)
Mouth connects with the bottom of the test tank (20).
3. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that the medium delivery pipe (1020)
The one end connected with the circulating tank (10) is located at the lower section of the circulation interface (11).
4. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that in the side wall of the circulating tank (10)
First valve (102) is provided with, the medium delivery pipe (1020) passes through first valve (102) and the circulating tank (10)
Connection.
5. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that set at the top of the circulating tank (10)
It is equipped with the first safety valve (71).
6. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that set at the top of the test tank (20)
It is equipped with the second safety valve (72).
7. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that the ultra-low temperature testing device also wraps
The 3rd safety valve (34) is included, the 3rd safety valve (34) connects with the A mouths of the first liquid in-out valve (33).
8. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that the ultra-low temperature testing device also wraps
The 4th safety valve (54) is included, the 4th safety valve (54) connects with the A mouths of the second liquid in-out valve (53).
9. ultra-low temperature testing device according to claim 1 or 2, it is characterised in that the circulation interface (11) includes the
Two valves (101).
A kind of 10. cryogenic testing method, it is characterised in that methods described is applied to as described in any one of claim 1~9
Ultra-low temperature testing device, methods described include：
Inerting drying process is carried out, the inerting drying process, which includes closing in the first liquid phase valve group and second liquid phase valve group, owns
Valve, the first gas valve, the first blow down valve, the second gas valve, the second blow down valve are opened, by first blow down valve to described
Nitrogen is passed through in ultra-low temperature testing device；
Precooling treatment is carried out to the ultra-low temperature testing device, the precooling treatment includes closing the first gas phase valve group and described the
All valves in two liquid phase valve groups, open tank deck liquid feed valve, tank bottom liquid in-out valve, the first liquid in-out valve, the 3rd gas valve, the 4th
Gas valve, liquid nitrogen is injected into the ultra-low temperature testing device from the first liquid in-out valve, or the precooling treatment includes
Valve all in valve all in the second gas phase valve group and the first liquid phase valve group is closed, opens pond top liquid feed valve, bottom of pond is entered
Liquid valve, the second liquid in-out valve, the first gas valve, the second gas valve, from the second liquid in-out valve to the cryogenic testing
Injection liquid nitrogen in device；
To the ultra-low temperature testing device fill processing, it is described to fill processing and include closing the first gas phase valve group and institute
All valves in second liquid phase valve group are stated, close the tank deck liquid feed valve, the tank bottom liquid in-out valve is opened, described first enters
Liquid valve, the 3rd gas valve and the 4th gas valve, from the first liquid in-out valve to the ultra-low temperature testing device
Interior injection liquid nitrogen.
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| CN108825483A (en) * | 2018-05-25 | 2018-11-16 | 江苏大学 | A kind of pump full working scope testing stand |
| CN109883140A (en) * | 2019-03-29 | 2019-06-14 | 湖北浠水蓝天联合气体有限公司 | A kind of nitrogen gas liquefaction system after space division system rectifying |
| CN113623238A (en) * | 2021-09-13 | 2021-11-09 | 浙江理工大学 | Cryogenic pump performance test system |
| CN114441165A (en) * | 2021-12-21 | 2022-05-06 | 合肥通用机械研究院有限公司 | Temperature and pressure calibration method for low-temperature micro-pressure differential pressure relief device for LNG |
| CN116292243A (en) * | 2023-02-16 | 2023-06-23 | 上海阿波罗机械股份有限公司 | Closed continuous self-feedback cryogenic pump test system depending on liquefied natural gas factory |
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| CN114441165A (en) * | 2021-12-21 | 2022-05-06 | 合肥通用机械研究院有限公司 | Temperature and pressure calibration method for low-temperature micro-pressure differential pressure relief device for LNG |
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| CN116292243A (en) * | 2023-02-16 | 2023-06-23 | 上海阿波罗机械股份有限公司 | Closed continuous self-feedback cryogenic pump test system depending on liquefied natural gas factory |
| CN116292243B (en) * | 2023-02-16 | 2024-02-23 | 上海阿波罗机械股份有限公司 | Closed continuous self-feedback cryogenic pump test system depending on liquefied natural gas factory |
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