CN107587999B - 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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- CN107587999B CN107587999B CN201710805429.1A CN201710805429A CN107587999B CN 107587999 B CN107587999 B CN 107587999B CN 201710805429 A CN201710805429 A CN 201710805429A CN 107587999 B CN107587999 B CN 107587999B
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Abstract
The invention discloses a kind of ultra-low temperature testing device and methods, belong to ultra-low temperature pump experimental rig field.The ultra-low temperature testing device includes circulating tank and test tank, flange ring is provided at the top of test tank, the first liquid phase valve group and the first gas phase valve group are provided on circulating tank, second liquid phase valve group and the second gas phase valve group are provided in test tank, liquid nitrogen is injected into circulating tank by the first liquid in-out valve, with to circulating tank carry out pre-cooling and liquid nitrogen fill, liquid nitrogen is injected into test tank by the second liquid in-out valve, with to test tank carry out pre-cooling and liquid nitrogen fill.The structure of ultra-low temperature testing device is simple, and it is easily operated, and tank deck liquid feed valve, tank bottom liquid in-out valve are respectively arranged at the top and bottom of circulating tank, to which when being pre-chilled liquid nitrogen can be injected by two valves simultaneously, to be pre-chilled simultaneously from the top and bottom of circulating tank, reduce excessive temperature differentials at the top and bottom of circulating tank influences caused by circulating tank.
Description
Technical field
The present invention relates to ultra-low temperature pump experimental rig field, in particular to a kind of ultra-low temperature testing device and method.
Background technique
Ultralow temperature immersed pump is a kind of for LNG (English: Liquefied Natural Gas, Chinese: liquefied natural gas)
The power-equipment of conveying.
Since ultralow temperature immersed pump is for conveying the inflammable medium of this kind of low temperature of LNG, to the resistance to low temperature of this kind of pump
And air-tightness, electrical security have high requirement.In order to guarantee the normal work of ultralow temperature immersed pump, needed before use
Ultralow temperature immersed pump is tested for the property.The ultra-low temperature testing device structure tested at present ultralow temperature immersed pump is answered
It is miscellaneous, it is inconvenient for use.
Summary of the invention
In order to solve the problems, such as existing ultra-low temperature testing device, structure is complicated, and the embodiment of the invention provides a kind of ultralow
Warm experimental rig and method.The technical solution is as follows:
On the one hand, the embodiment of the invention provides a kind of ultra-low temperature testing device, the ultra-low temperature testing device includes following
Ring tank and test tank are provided with the flange ring for inserting ultralow temperature immersed pump to be tested at the top of the test tank, described
It is provided with the first liquid phase valve group and the first gas phase valve group on circulating tank, is provided with second liquid phase valve group and second in 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, the tank deck into
The A mouth of liquid valve is connected to the top of the circulating tank, the A mouth company of the B mouth and the first liquid in-out valve of the tank deck liquid feed valve
Logical, A mouth of the tank bottom liquid in-out valve is connected to the bottom of the circulating tank, the B mouth of the tank bottom liquid in-out valve and described the
The A mouth of one liquid in-out valve is connected to, and the first gas phase valve group includes the first gas valve, the first blow down valve, the second gas valve, described
The A mouth of first gas valve is connected to the top of the circulating tank, the A of the B mouth and second gas valve of first gas valve
Mouth connection, the A mouth of first blow down valve are connected to the B mouth of first gas valve, and the second liquid phase valve group includes Chi Ding
The A mouth of liquid feed valve, bottom of pond liquid in-out valve, the second liquid in-out valve, pond top liquid feed valve is connected to the top of the test tank, institute
The B mouth for stating pond top liquid feed valve is connected to the A mouth of the second liquid in-out valve, the A mouth of the bottom of pond liquid in-out valve and the test
The bottom of tank is connected to, and the B mouth of the bottom of pond liquid in-out valve is connected to the A mouth of the second liquid in-out valve, second gas valve
Group includes third gas valve, the second blow down valve, the 4th gas valve, the top of the A mouth and the test tank of the third gas valve
Connection, B mouth of the third gas valve be connected to the A mouth of the 4th gas valve, the A mouth of second blow down valve and described the
The B mouth of three gas valves is connected to, and is connected between the circulating tank and the test tank by medium delivery pipe, the side of the circulating tank
Circulation interface is provided on wall.
Preferably, the ultra-low temperature testing device further includes the first shut-off valve and the second shut-off valve, first shut-off valve
A mouth be connected to the bottom of the circulating tank, the B mouth of first shut-off valve is connected to the B mouth of second shut-off valve, described
The A mouth of second shut-off valve is connected to the bottom of the test tank.
Preferably, the one end of the medium delivery pipe being connected to the circulating tank is located at the lower section of the circulation interface.
Further, first valve is provided on the side wall of the circulating tank, the medium delivery pipe passes through described first
Root valve is connected to the circulating tank.
Preferably, the first safety valve is provided at the top of the circulating tank.
Preferably, the second safety valve is provided at the top of the test tank.
Optionally, the ultra-low temperature testing device further includes third safety valve, the third safety valve with described first into
The A mouth of liquid valve is connected to.
Preferably, the ultra-low temperature testing device further includes the 4th safety valve, the 4th safety valve with described second into
The A mouth of liquid valve is connected to.
Further, the circulation interface includes second valve.
On the other hand, the embodiment of the invention also provides a kind of cryogenic testing method, the method is suitable for above-mentioned
Any ultra-low temperature testing device, which comprises
Inerting drying process is carried out, it includes closing in the first liquid phase valve group and second liquid phase valve group that the inerting, which is dried,
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, third gas valve,
4th gas valve injects liquid nitrogen or the precooling treatment 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, opens pond and push up liquid feed valve, pond
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
Liquid nitrogen is injected in experimental rig；
The ultra-low temperature testing device is carried out to fill processing, it is described to fill processing including 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 third gas valve and the 4th gas valve, from the first liquid in-out valve to the cryogenic testing
Liquid nitrogen is injected in device.
Technical solution provided in an embodiment of the present invention has the benefit that through setting circulating tank and test tank, follows
It is connected between ring tank and test tank by medium delivery pipe, flange ring is provided at the top of test tank, to be tested can surpassed
Low temperature immersed pump is inserted into inside test tank, and is fixedly connected with flange ring, by be arranged on circulating tank the first liquid phase valve group and
Second liquid phase valve group and the second gas phase valve group is arranged, wherein the first liquid phase valve group includes tank in first gas phase valve group in test 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
Third 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 open the first gas valve, the first blow down valve, the second blow down valve, the 4th gas valve, pass through first
Blow down valve is passed through dry nitrogen into circulating tank, so that the oxygen in circulating tank and test tank be discharged.Then pass through closing again
All valves in first gas phase valve group and the second gas phase valve group are opened all in the first liquid phase valve group and second liquid phase valve group
Valve injects liquid nitrogen into circulating tank by the first liquid in-out valve, with to circulating tank carry out pre-cooling and liquid nitrogen fill,
Liquid nitrogen is injected into test tank by the second liquid in-out valve, with to test tank carry out pre-cooling and liquid nitrogen fill.It is super
The structure of cryogenic test equipment is simple, and easily operated, and tank deck liquid feed valve, tank are respectively arranged at the top and bottom of circulating tank
Bottom liquid in-out valve, so that when being pre-chilled liquid nitrogen can be injected by two valves simultaneously, thus from the top of circulating tank and
Bottom is pre-chilled simultaneously, and reduce excessive temperature differentials at the top and bottom of circulating tank influences caused by circulating tank.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached 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.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached 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.It is provided with the first liquid phase valve group 30 and the first gas phase valve group 40 on circulating tank 10, is provided in test tank 20
Second liquid phase valve group 50 and the second gas phase valve group 60.
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 mouth of tank deck liquid feed valve 31 is connected to the top of circulating tank 10, the B mouth of tank deck liquid feed valve 31 with first into
The A mouth of liquid valve 33 is connected to, and the A mouth of tank bottom liquid in-out valve 32 is connected to the bottom of circulating tank 10, the B mouth of tank bottom liquid in-out valve 32
It is connected to the A mouth 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 mouth of the first gas valve 41 is connected to the top of circulating tank 10, the B mouth and the second gas of the first gas valve 41
The A mouth of phase valve 43 is connected to, and the A mouth of the first blow down valve 42 is connected to the B mouth of the first gas valve 41.
Second liquid phase valve group 50 includes that liquid feed valve 51, bottom of pond liquid in-out valve 52, the second liquid in-out valve 53 are pushed up in pond.
Wherein, pond top liquid feed valve 51 A mouth be connected to the top of test tank 20, pond top liquid feed valve 51 B mouth and second into
The A mouth of liquid valve 53 is connected to, and the A mouth of bottom of pond liquid in-out valve 52 is connected to the bottom of test tank 20, the B mouth of bottom of pond liquid in-out valve 52
It is connected to the A mouth of the second liquid in-out valve 53.
Second gas phase valve group 60 includes third gas valve 61, the second blow down valve 62, the 4th gas valve 63.
Wherein, the A mouth of third gas valve 61 is connected to the top of test tank 20, the B mouth and the 4th gas of third gas valve 61
The A mouth of phase valve 63 is connected to, and the A mouth of the second blow down valve 62 is connected to the B of third gas valve 61 mouth.
It is connected between circulating tank 10 and test tank 20 by medium delivery pipe 1020, is provided with and follows on the side wall of circulating tank 10
Ring interface 11.
The embodiment of the present invention is connected between circulating tank and test tank by medium delivery pipe by setting circulating tank and test tank
It is logical, it is provided with flange ring at the top of test tank, ultralow temperature immersed pump to be tested can be inserted into inside test tank, and and flange
Ring is fixedly connected, and by the way that the first liquid phase valve group and the first gas phase valve group are arranged on circulating tank, the second liquid is arranged 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 third gas valve, the second blow down valve, the 4th gas phase
Valve opens the first gas so as to all valves before being tested, first closed in the first liquid phase valve group and second liquid phase valve group
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,
To the oxygen being discharged in circulating tank and test tank.Then pass through the institute in the first gas phase valve group of closing and the second gas phase valve group again
There is valve, opens 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, with to circulating tank carry out pre-cooling and liquid nitrogen fill, liquid is injected into test tank by the second liquid in-out valve
State nitrogen, with to test tank carry out pre-cooling and liquid nitrogen fill.The structure of ultra-low temperature testing device is simple, and is easy to grasp
Make, and be respectively arranged with tank deck liquid feed valve, tank bottom liquid in-out valve at the top and bottom of circulating tank, thus can be with when being pre-chilled
Liquid nitrogen is injected by two valves simultaneously, to be pre-chilled simultaneously from the top and bottom of circulating tank, is reduced at the top of circulating tank
It is influenced caused by circulating tank with bottom excessive temperature differentials.
As shown in Figure 1, the top of test tank 20 is provided with flange ring 21, during the test, ultralow temperature can be dived 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
It is sealed between tank 20, avoids the leakage of test(ing) medium.
As shown in Figure 1, the ultra-low temperature testing device can also include the first shut-off valve 81 and the second shut-off valve 82, first section
Only the A mouth of valve 81 is connected to the bottom of circulating tank 10, and the B mouth of the first shut-off valve 81 is connected to the B mouth of the second shut-off valve 82, and second
The A mouth of shut-off valve 82 is connected to the bottom of test tank 20.So as to terminate test when, by the first shut-off valve 81 and second section
Only valve 82 is all opened, and opens third gas valve 61, the second blow down valve 62, is passed through by the second blow down valve 62 into test tank 20
Liquid nitrogen in test tank 20 is expelled back into circulating tank 10 by nitrogen, completes the recycling to liquid nitrogen.
Preferably, first valve 102 can be set on the side wall of circulating tank 10, medium delivery pipe 1020 passes through first
Valve 102 is connected to circulating tank 10.First valve 102 is arranged on the side wall of circulating tank 10 can be in circulating tank 10 filled with liquid
Nitrogen, and when ultra-low temperature testing device needs to carry out emergency maintenance, first valve 102 can be closed, just likes that medium delivery pipe
1020 and first valve 102 disconnect.
In addition, circulation interface 11 may include second valve 101, the A mouth of second valve 101 can connect with circulation interface 11
It is logical, during the test, the liquid outlet of ultralow temperature immersed pump to be tested can be connected to the B of second valve 101 mouth, thus
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 mouth when, can connect flow control valve 1022 between the B mouth of the liquid outlet of ultralow temperature immersed pump and second valve 101, to adjust
Save the flow of the liquid outlet of ultralow temperature immersed pump.
Preferably, the one end of medium delivery pipe 1020 being connected to circulating tank 10 can be located at the lower section of circulation interface 11.
It, in this way can be in order to which liquid nitrogen be by medium delivery pipe specifically as shown in Figure 1, the lower section of second valve 101 is arranged in first valve 102
1020 enter in test tank 20.
Gate valve 1021 can be set in 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 first safety valve 71 has can be set in the top of circulating tank 10.Due to a part in circulating tank 10
Liquid nitrogen can gasify, and the pressure in circulating tank 10 is caused to increase, and the first safety valve 71 can be led when pressure is excessive in circulating tank 10
Logical, timely discharge part nitrogen reduces the pressure in circulating tank 10, it is ensured that safety.
In addition, the second safety valve 72 has can be set in the top of test tank 20.Second safety valve 72 can be in test tank 20
It is connected when internal pressure is excessive, timely discharge part nitrogen, reduces the pressure in test tank 20, it is ensured that safety.
Preferably, ultra-low temperature testing device can also include third safety valve 34, third safety valve 34 and the first liquid in-out
The A mouth of valve 33 is connected to.Due to being possible to the phenomenon that freezing in pipeline when being passed through liquid nitrogen into circulating tank 10, to make
At the blocking of pipeline.After pipeline blockage, the liquid nitrogen in pipeline can gradually gasify, and pipeline inner pressure is caused to increase, and pass through setting
Third safety valve 34 can be connected when pipeline inner pressure is excessive, and the nitrogen in pipeline is discharged from the B mouth of third safety valve 34,
Ensure the safety of ultra-low temperature testing device.
Ultra-low temperature testing device can also include the 4th safety valve 54, the A of the 4th safety valve 54 and the second liquid in-out valve 53
Mouth connection.Due to being also possible to the phenomenon that freezing in pipeline when being passed through liquid nitrogen into test tank 20, to cause pipeline
Blocking.After pipeline blockage, the liquid nitrogen in pipeline can gradually gasify, and pipeline inner pressure is caused to increase, and pass through the 4th peace of setting
Full valve 54 can be connected when pipeline inner pressure is excessive, and the nitrogen in pipeline is discharged from the B mouth of the 4th safety valve 54, it is ensured that
The safety of ultra-low temperature testing device.
In addition, the A mouth of the first blow down valve 42 can also be communicated with a safety valve, the first gas phase of connection may insure in this way
The safety of the pipeline of valve group 40.Correspondingly, the A mouth of the second blow down valve 62 can also be communicated with a safety valve.
Preferably, it is also provided with pressure gauge 103 on circulating tank 10, to measure the pressure in circulating tank 10, it is ensured that examination
The safety tested.
In addition, pressure gauge also can be set in test tank 20.Temperature is also provided in 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 suitable for shown in Fig. 1
Ultra-low temperature testing device, before being tested, ultralow temperature immersed pump has been set in test tank.As shown in Fig. 2, the party
Method includes:
S11: inerting drying process is carried out.
Wherein, it includes closing valve all in the first liquid phase valve group and second liquid phase valve group that inerting, which is dried, opens the
One gas valve, the first blow down valve, the second gas valve, the second blow down valve are 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 connect with nitrogen drier, then by the outlet of nitrogen drier and the
The B mouth of one blow down valve is connected to, and nitrogen is passed through into ultra-low temperature testing device, and progress oxygen is dense at the B mouth of the second blow down valve
Degree detection (can using hand-held oxygen instrument measure), when being passed through nitrogen, it is 0.8 that the pressure of nitrogen cylinder is adjustable~
1.0MPa, until the second blow down valve, the second gas valve are first closed when the oxygen concentration at the B mouth of the second blow down valve is lower than 2%,
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, third gas valve, the 4th gas valve, from the first liquid in-out valve to ultralow temperature
Liquid nitrogen is injected in experimental rig.
Specifically, liquid nitrogen can be filled to the B mouth that hose is connected to the first liquid in-out valve, infused into circulating tank and test tank
Enter liquid nitrogen.
Before carrying out precooling treatment, the first gas valve, the second gas valve, third gas valve, the 4th gas can also be opened
Phase valve, when pressure drops to 0.2MPa or less, closes the first gas valve, the to reduce the pressure in ultra-low temperature testing device
Two gas valves, third gas valve, the 4th gas valve, to be ready for precooling treatment.It can be to circulation during injecting liquid nitrogen
Carry out temperature measurement in tank and test tank, the speed control for declining the temperature in circulating tank and test tank in 10~12 DEG C/h,
Injection process is gentle, and the pressure in circulating tank and test tank is avoided to increase suddenly.During injecting liquid nitrogen, when circulating tank or
When pressure in test tank is excessive (such as can be the setting value of the first safety valve or the second safety valve in previous embodiment
90%) the first gas valve, the second gas valve, third gas valve, the 4th gas valve, can be opened, circulating tank and test tank are reduced
Interior pressure.
In addition, precooling treatment also may include closing in valve and the first liquid phase valve group all in the second gas phase valve group to own
Valve, open pond push up liquid feed valve, bottom of pond liquid in-out valve, the second liquid in-out valve, the first gas valve, the second gas valve, by second into
Liquid valve injects liquid nitrogen into ultra-low temperature testing device.
In pre-cooling, liquid nitrogen is filled into hose and is alternately connected to B mouth of the second liquid in-out valve, from the second liquid in-out valve to surpassing
Liquid nitrogen is passed through in cryogenic test equipment.
It is preferred that the temperature difference of circulating tank and test tank can be made in this way alternately through the first liquid in-out valve and the second liquid in-out valve
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.
Filling processing includes all valves closed in the first gas phase valve group and second liquid phase valve group, closes tank deck feed liquor
Valve opens tank bottom liquid in-out valve, the first liquid in-out valve, third gas valve and the 4th gas valve, from the first liquid in-out valve to ultralow
Liquid nitrogen is injected in warm experimental rig.
After completing precooling treatment, liquid nitrogen is injected into circulating tank by the first liquid in-out valve, during injecting liquid nitrogen,
When circulating tank and larger test pressure inside the tank, the first gas valve, the second gas valve, third gas valve, the 4th gas can be opened
Phase valve, reduces the pressure in circulating tank and test tank, and pressure is maintained 0.2MPa or less in the process by injection liquid nitrogen.In circulating tank
Stop filling processing when interior liquid level rises to the 85%~90% of the height of circulating tank, closing tank bottom liquid in-out valve and first into
Liquid valve disconnects liquid nitrogen and fills hose.
After completing to fill processing, needs the liquid nitrogen to ultra-low temperature testing device and its inside to save, saving
Cheng Zhong can detecte the pressure in circulating tank and test tank, can be by opening the first gas phase when pressure is in 0.5MPa or more
Valve group and the second gas phase valve group, the pressure reduced in circulating tank and test tank can be by opening when pressure is in 0.5MPa or less
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 merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of ultra-low temperature testing device, the ultra-low temperature testing device includes circulating tank (10) and test tank (20), feature
It is, the flange ring (21) for inserting ultralow temperature immersed pump to be tested is provided at the top of the test tank (20), it is described
It is provided with the first liquid phase valve group (30) and the first gas phase valve group (40) on circulating tank (10), is provided on 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 mouth of the tank deck liquid feed valve (31) is connected to the top of the circulating tank (10), the B mouth of the tank deck liquid feed valve (31) and institute
The A mouth connection of the first liquid in-out valve (33) is stated, the A mouth of the tank bottom liquid in-out valve (32) connects with the bottom of the circulating tank (10)
Logical, the B mouth of the tank bottom liquid in-out valve (32) is connected to the A mouth 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 mouth of first gas valve (41) is connected to the top of the circulating tank (10), the B mouth of first gas valve (41) and described the
The A mouth of two gas valves (43) is connected to, and the A mouth of first blow down valve (42) is connected to the B mouth 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 mouth of pond top liquid feed valve (51) is connected to the top of the test tank (20), the B mouth of pond top liquid feed valve (51) and institute
The A mouth connection of the second liquid in-out valve (53) is stated, the A mouth of the bottom of pond liquid in-out valve (52) connects with the bottom of the test tank (20)
Logical, the B mouth of the bottom of pond liquid in-out valve (52) is connected to the A mouth of the second liquid in-out valve (53),
The second gas phase valve group (60) includes third gas valve (61), the second blow down valve (62), the 4th gas valve (63), described
The A mouth of third gas valve (61) is connected to the top of the test tank (20), the B mouth of the third gas valve (61) and described the
The A mouth of four gas valves (63) is connected to, and the A mouth of second blow down valve (62) is connected to the B mouth of the third gas valve (61),
It is 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, which is characterized in that the ultra-low temperature testing device further includes
One shut-off valve (81) and the second shut-off valve (82), the A mouth of first shut-off valve (81) connect with the bottom of the circulating tank (10)
Logical, the B mouth of first shut-off valve (81) is connected to the B mouth of second shut-off valve (82), the A of second shut-off valve (82)
Mouth is connected to the bottom of the test tank (20).
3. ultra-low temperature testing device according to claim 1 or 2, which is characterized in that the medium delivery pipe (1020)
The one end being connected to 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, which is characterized in that on the side wall of the circulating tank (10)
It is provided with first valve (102), 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, which is characterized 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, which is characterized 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, which is characterized in that the ultra-low temperature testing device also wraps
It includes third safety valve (34), the third safety valve (34) is connected to the A mouth of the first liquid in-out valve (33).
8. ultra-low temperature testing device according to claim 1 or 2, which is characterized in that the ultra-low temperature testing device also wraps
The 4th safety valve (54) is included, the 4th safety valve (54) is connected to the A mouth of the second liquid in-out valve (53).
9. ultra-low temperature testing device according to claim 1 or 2, which is characterized in that the circulation interface (11) includes the
Two valves (101).
10. a kind of cryogenic testing method, which is characterized in that the method is suitable for as described in any one of claims 1 to 9
Ultra-low temperature testing device, which comprises
Inerting drying process is carried out, it includes closing in the first liquid phase valve group and second liquid phase valve group to own that the inerting, which is dried,
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, third gas valve, the 4th
Gas valve injects liquid nitrogen into the ultra-low temperature testing device from the first liquid in-out valve or the precooling treatment includes
Close valve all in valve all in the second gas phase valve group and the first liquid phase valve group, open pond top liquid feed valve, bottom of pond into
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
Liquid nitrogen is injected in device；
The ultra-low temperature testing device is carried out to fill processing, it is described to fill processing including closing the first gas phase valve group and institute
State all valves in second liquid phase valve group, close the tank deck liquid feed valve, open the tank bottom liquid in-out valve, described first into
Liquid valve, the third 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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| CN108825483B (en) * | 2018-05-25 | 2019-11-05 | 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 |
| CN113623238B (en) * | 2021-09-13 | 2023-03-28 | 浙江理工大学 | Cryogenic pump performance test system |
| CN114441165B (en) * | 2021-12-21 | 2023-11-03 | 合肥通用机械研究院有限公司 | Temperature and pressure verification method for low-temperature micro-pressure differential pressure relief device for LNG |
| 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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| JPS5979082A (en) * | 1982-10-28 | 1984-05-08 | Osaka Gas Co Ltd | Operation test for lng pump |
| CN203742971U (en) * | 2014-02-24 | 2014-07-30 | 大连深蓝泵业有限公司 | Novel cryogenic pump test bench |
| KR20160016035A (en) * | 2014-08-01 | 2016-02-15 | 협성철광 주식회사 | Testing apparatus for low pressure pump for LNG |
| CN105864018A (en) * | 2016-04-05 | 2016-08-17 | 武汉船用机械有限责任公司 | Ultralow-temperature test device suitable for LNG immersed pump |
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| JPS5979082A (en) * | 1982-10-28 | 1984-05-08 | Osaka Gas Co Ltd | Operation test for lng pump |
| CN203742971U (en) * | 2014-02-24 | 2014-07-30 | 大连深蓝泵业有限公司 | Novel cryogenic pump test bench |
| KR20160016035A (en) * | 2014-08-01 | 2016-02-15 | 협성철광 주식회사 | Testing apparatus for low pressure pump for LNG |
| CN105864018A (en) * | 2016-04-05 | 2016-08-17 | 武汉船用机械有限责任公司 | Ultralow-temperature test device suitable for LNG immersed pump |
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