CN209511606U - A kind of multi-arm intelligence super-low liquid unloading unit - Google Patents
A kind of multi-arm intelligence super-low liquid unloading unit Download PDFInfo
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- CN209511606U CN209511606U CN201920211703.7U CN201920211703U CN209511606U CN 209511606 U CN209511606 U CN 209511606U CN 201920211703 U CN201920211703 U CN 201920211703U CN 209511606 U CN209511606 U CN 209511606U
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Abstract
The utility model discloses a kind of multi-arm intelligence super-low liquid unloading units, including storage tank and multiple units of unloading, unit of each unloading includes tank car, cryogenic pump sled and pressurization gasifier, tank car liquid phase interface is provided on tank car, tank car gas phase interface and boost fluid interfaces, cryogenic pump sled includes unloading oil filling riser liquid phase arm, it unloads pipeline, unloading oil filling riser gas phase arm and gas phase pipeline, tank car liquid phase interface is connect by unloading oil filling riser liquid phase arm with pipeline one end of unloading, the pipeline other end of unloading is connect with storage tank liquid phase general pipeline, tank car gas phase interface is connect by unloading oil filling riser gas phase arm with gas phase pipeline one end, the gas phase pipeline other end is connect with storage tank gas phase general pipeline, it unloads and is provided with liquid phase branch on pipeline.Using the device and technique of the utility model, certain pressure difference is able to maintain that between tank car and storage tank during unloading, the condition that unloading pump operates normally both has been ensure that, has also improved and unload vehicle speed.
Description
Technical field
The utility model belongs to super-low liquid and unloads technical field, and in particular to a kind of multi-arm intelligence super-low liquid unloads
Vehicle device.
Background technique
Currently, super-low liquid LNG tank car is unloaded, the mode of unloading is unloaded or pumped to general use from pressurization, unloads turner from pressurization
Skill is simple, and since tank car liquid level is low, pressurization time is long, and the time of unloading is long, and 50 cubes of groove tank time that needs to unload is 3~4 small
When；If adopting discharge by pump, due to being limited by groove tank car outlet caliber, the liquid outlet of current country's automotive groove tank car standard
Caliber is DN50, limits the flow of LNG, due to the special nature of super-low liquid, is easy to produce cavitation, causes to use
Unloading pump, which is unloaded, can not be greatly shortened the time of unloading.The LNG peak regulation station scale of domestic construction is increasing at present, largely
LNG use Automobile Transportation, how Quick-unloading the problem of it is urgently to be resolved.
It either unloads from pressurization or unloading pump is unloaded, pressure difference during unloading in tank car and storage tank is without Faville
Hold relative constant, to cause to unload, vehicle speed is slow, and unloading pump is failed due to cavitation erosion, cannot play due effect.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of multi-arm
Intelligent super-low liquid unloading unit.Device time of unloading is short, and 50 cubes of tank car time that needs to unload is in 1.5 hours,
The optimal time of unloading can reach 50 minutes to 70 minutes, so that tradition time of unloading is foreshortened to 1/3 or so, effectively increases effect of unloading
Rate.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of multi-arm intelligence super-low liquid
Unloading unit, which is characterized in that including storage tank and multiple units of unloading, each unit of unloading includes tank car, cryogenic pump
Gasifier is prized and be pressurized, is provided with tank car liquid phase interface, tank car gas phase interface and boost fluid interfaces on the tank car, it is described low
Temperature pump sled includes unloading oil filling riser liquid phase arm, pipeline of unloading, unloading oil filling riser gas phase arm and gas phase pipeline, and the tank car liquid phase interface is logical
It crosses unloading oil filling riser liquid phase arm to connect with the one end for pipeline of unloading, the other end for pipeline of unloading is connect with storage tank liquid phase general pipeline, described
Tank car gas phase interface is connect by unloading oil filling riser gas phase arm with one end of gas phase pipeline, the other end and storage tank gas phase of gas phase pipeline
General pipeline connection is interfaced between storage tank liquid phase general pipeline on the pipeline of unloading from tank car liquid phase and is disposed with first pressure sensing
Device, unloading pump, the first temperature sensor, second pressure sensor and the first valve, it is described to unload on pipeline and be located at the second pressure
Position between force snesor and the first valve is provided with liquid phase branch, one end of the liquid phase branch and piping connection of unloading,
The other end of liquid phase branch connect with the inlet of pressurization gasifier, the gas outlet of the pressurization gasifier by the second pipeline and
Gas phase piping connection, the boost fluid interfaces are connect by the first pipeline with liquid phase branch, and the liquid phase branch road is provided with
Second valve, the position on the gas phase pipeline close to tank car gas phase interface is provided with second temperature sensor and third pressure passes
Sensor；Gas phase branch is provided on the gas phase pipeline, one end of the gas phase branch connects with gas phase pipeline, gas phase branch
The other end connects tank car gas phase pipe, and the tank car gas phase pipe connects with the tank car gas phase interface for unit of each unloading, gas phase branch
Road is provided with third valve.
Above-mentioned a kind of multi-arm intelligence super-low liquid unloading unit, which is characterized in that on the gas phase pipeline and be located at
Position between gas phase branch and storage tank gas phase general pipeline is provided with the 4th valve.
A kind of above-mentioned multi-arm intelligence super-low liquid unloading unit, which is characterized in that it further include control system, the control
System processed includes PLC controller and the power supply for the power supply of each power unit, the first pressure sensor of the unit of unloading,
First temperature sensor, second pressure sensor, second temperature sensor and third pressure sensor are defeated with PLC controller
Enter end connection, unloading pump, the first valve, the second valve, third valve and the 4th valve of the unit of unloading are and PLC
The output end of controller connects.
Above-mentioned a kind of multi-arm intelligence super-low liquid unloading unit, which is characterized in that close to storage on the pipeline of unloading
The position of tank liquid phase general pipeline is provided with first check-valve.
Above-mentioned a kind of multi-arm intelligence super-low liquid unloading unit, which is characterized in that the liquid phase branch and be located at the
The downstream of two valves is provided with second check-valve.
Compared with the prior art, the utility model has the following advantages:
1, compared with oneself existing pressurization is unloaded, the device of the utility model is unloaded, and the time is short, and 50 cubes of tank car needs unload
The vehicle time be 1.5 hours in, the optimal time of unloading can reach 50 minutes to 70 minutes, make tradition unload the time foreshorten to 1/3 a left side
The right side effectively increases efficiency of unloading.
2, compared with conventional pump is unloaded, utility model device can effectively avoid cavitation in unloading pump operational process
Occur, vehicle speed is unloaded in raising.
3, the advantages of opposite pressurization is unloaded certainly and pump is unloaded, utility model device is tank car and storage during unloading
Certain pressure difference is able to maintain that between tank, by acquiring the pressure and pressurization gasifier exit temperature data of tank car and storage tank,
PLC controller is fed back to, the aperture of PLC controller control valve adjusts the flow for entering the super-low liquid of pressurization gasifier,
It is always ensured that unloading pump is in optimal operating status to control the pressure difference in tank car and storage tank, reduces operational process of unloading
In cavitation and rate of breakdown, unload efficiency to improve.
4, the multiple units of unloading of the utility model setting are, it can be achieved that multiple tank cars while unloading；Each unit gas phase of unloading
Branch is connect with tank car gas phase pipe, and tank car gas phase pipe connects with the tank car gas phase interface for unit of each unloading, and unloads
Pressure balance between each tank car is controlled by detecting the tank car pressure of each unit of unloading in journey, when some unit of unloading
When tank car hypotony, the gas in the high tank car of pressure can be sent into other pressure mistakes by gas phase branch and tank car gas phase pipe
It is pressurized in low tank car, the pressurization time of tank car and the pre-coo time of unloading pump is shortened, improves and unload vehicle speed
With efficiency of unloading.
5, the advantages of opposite pressurization is unloaded certainly and pump is unloaded, utility model device, which also resides in control to enter by valve, to be increased
The ultralow temperature gas flow of gasifier is pressed, to control the gasification temperature of pressurization gasifier exit, had both realized and low-temperature tanker is increased
Pressure, while preventing the gas of overheat from entering tank car, cause super-low liquid in tank car largely to gasify, reduction flashes during unloading
Vapour discharge amount has reached energy-efficient effect, also improves the operational safety for the process of unloading.
With reference to the accompanying drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of utility model device.
Fig. 2 is the structural schematic diagram of a unit of unloading of the utility model.
Fig. 3 is the connection relationship diagram of the unload unit and a PLC controller of the utility model.
1-tank car；2-cryogenic pumps sled；3-unloading oil filling riser liquid phase arms；
4-unload pipeline；5-first pressure sensors；6-PLC controllers；
7-unloading pumps；8-the first temperature sensor；9-second pressure sensors；
10-the first valve；11-storage tank liquid phase general pipeline；12-storage tank gas phase general pipeline；
13-the second valve；14-gas phase branches；15-third valves；
16-the four valve；17-liquid phase branches；18-gas phase pipelines；
19-the first pipeline；20-pressurization gasifiers；21-the second pipeline；
22-second temperature sensors；23-third pressure sensors；24-unloading oil filling riser gas phase arms；
25-tank car gas phase pipes；26-have first check-valve；27-second check-valves.
Specific embodiment
Embodiment 1
As depicted in figs. 1 and 2, the multi-arm intelligence super-low liquid unloading unit of the utility model, including storage tank and multiple
It unloads unit, each unit of unloading includes tank car 1, cryogenic pump sled 2 and pressurization gasifier 20, is provided on the tank car
Tank car liquid phase interface, tank car gas phase interface and boost fluid interfaces, the cryogenic pump sled 2 include unloading oil filling riser liquid phase arm 3, unload
Pipeline 4, unloading oil filling riser gas phase arm 24 and gas phase pipeline 18, the tank car liquid phase interface pass through unloading oil filling riser liquid phase arm 3 and unload
One end of pipeline 4 connects, and the other end for pipeline 4 of unloading is connect with storage tank liquid phase general pipeline 11, and the tank car gas phase interface is by unloading
Vehicle oil filling riser gas phase arm 24 is connect with one end of gas phase pipeline 18, and the other end of gas phase pipeline 18 is connect with storage tank gas phase general pipeline 12,
It is interfaced between storage tank liquid phase general pipeline 11 on the pipeline 4 of unloading from tank car liquid phase and is disposed with first pressure sensor 5, unloads
Vehicle pumps the 7, first temperature sensor 8, second pressure sensor 9 and the first valve 10, described to unload on pipeline 4 and be located at the second pressure
Position between force snesor 9 and the first valve 10 is provided with liquid phase branch 17, one end of the liquid phase branch 17 and pipe of unloading
Road 4 connects, and the other end of liquid phase branch 17 is connect with the inlet of pressurization gasifier 20, the gas outlet of the pressurization gasifier 20
It is connect by the second pipeline 21 with gas phase pipeline 18, the boost fluid interfaces are connected by the first pipeline 19 with liquid phase branch 17
It connects, the second valve 13 is provided on the liquid phase branch 17, is set on the gas phase pipeline 18 close to the position of tank car gas phase interface
It is equipped with second temperature sensor 22 and third pressure sensor 23；Gas phase branch 14 is provided on the gas phase pipeline 18, it is described
One end of gas phase branch 14 connects with gas phase pipeline 18, and the other end of gas phase branch 14 connects tank car gas phase pipe 25, the tank car
Gas phase pipe 25 connects with the tank car gas phase interface for unit of each unloading, and third valve 15 is provided on gas phase branch 14.
In the present embodiment, on the gas phase pipeline 18 and position between gas phase branch 14 and storage tank gas phase general pipeline 12
It is provided with the 4th valve 16.
As shown in figure 3, further including control system in the present embodiment, the control system includes PLC controller 6 and is each
The power supply of power unit power supply, the first pressure sensor 5 of each unit of unloading, the first temperature sensor 8, second pressure
Sensor 9, second temperature sensor 22 and third pressure sensor 23 are connect with the input terminal of PLC controller 6, each described
Unload unit unloading pump 7, the first valve 10, the second valve 13, third valve 15 and the 4th valve 16 with PLC controller 6
Output end connection.
In the present embodiment, the position on the pipeline 4 of unloading close to storage tank liquid phase general pipeline 11 is provided with first check-valve 26.
In the present embodiment, the liquid phase branch 17 and be located at the second valve 13 downstream be provided with second check-valve 27.
The principle of the control system of the utility model includes: the pressure for the tank car 1 that first pressure sensor 5 detects,
The pressurization that 20 Outlet Temperatures of pressurization gasifier and third pressure sensor 23 that two temperature sensors 22 detect detect
To PLC controller 6, PLC controller 6 is entered by the aperture control of the second valve 13 to be increased 20 outlet pressure data feedback of gasifier
The flow of the super-low liquid of gasifier 20 is pressed, and then controls tank car 1 and is always ensured that unloading pump 7 is in the pressure difference in storage tank
Optimal operating status reduces cavitation and rate of breakdown in operational process of unloading, while improving efficiency of unloading.
Embodiment 2
When storage tank is atmospheric storage tank, i.e., when the pressure P in storage tank is 0.1MPa, carried out using the device of the utility model
The technique that super-low liquid is unloaded includes:
Step 1: carrying out nitrogen displacement to the air in each pipeline of device；
Step 2: super-low liquid in tank car 1 is by unloading pipeline 4 and the first pipeline 19 enters liquid phase branch 17, so
It is introduced into pressurization gasifier 20 afterwards tank car 1 is pressurized, opened in pressurization by the second valve 13 on liquid phase branch 17
The flow that extent control enters the super-low liquid of pressurization gasifier 20 is closed, the pressure in tank car 1 constantly increases, and works as first pressure
The pressure P in tank car 1 that sensor 5 detects1Reach 0.4MPa~0.8MPa, while when dynamic amount Δ P meets the following conditions,
The first valve 10 is opened, unloading pump 7 is pre-chilled:
Ps=(λ L/d) ρ v2/2；
Δ P=P1- P=P2-1+Ps；
In formula:
P2-1--- theoretical pressure difference, unit MPa；
P --- the pressure in storage tank, unit MPa；
Ps--- the pressure loss, unit MPa；
The density of ρ --- fluid, unit kg/m3；
ν12--- the speed of tank car liquid outlet fluid, unit m/s；
ν22--- the speed of unloading pump inlet fluid, unit m/s；
ν --- pipeline fluid speed, unit m/s；
gZ1--- the position energy of tank car liquid outlet, unit m2/s2；
gZ2--- the position energy of unloading pump inlet, unit m2/s2；
λ --- pipeline frictional resistant coefficient；
L --- duct length, unit m；
D --- internal diameter of the pipeline, unit m；
When meeting following two condition simultaneously, starting unloading pump 7 is unloaded:
Dynamic amount Δ P=P1- P=P2-1+Ps；
And the first temperature T that detects of temperature sensor 81<-120℃；
During unloading, while unloading pump 7 is unloaded, by adjusting the opening and closing degree of the second valve 13, make in tank car
The some ultra-low geothermal liquid of outflow is introduced into pressurization gasifier 20 by liquid phase branch 17 and is pressurized to tank car, and controls pressurization gasification
Device 20 exports the temperature that second temperature sensor 22 detects and meets the following conditions:
P3=∑ yiPci；
Tc=∑ yiTci；
Δ T=T2-Tc；
Δ T is 278K~298K；
In formula: Ai, Bi, Ci, yi are constant, look into " deep cooling handbook "；
P3--- the pressure that third pressure sensor detects, unit MPa；
Pci--- Various Components In Natural Gas pressure caused by saturation state steam, unit MPa；
Tci--- Various Components In Natural Gas possessed temperature in saturation state, unit K；
Tc——P3The saturation temperature of lower super-low liquid, unit K；
T2--- the temperature that second temperature sensor detects；
It maintains dynamic to measure Δ P simultaneously and meets the following conditions:
Dynamic amount Δ P=P1- P=P2-1+Ps；
The pressure balance between each tank car is controlled by detecting the tank car pressure of each unit of unloading during unloading,
When the tank car hypotony of some unit of unloading, the third valve 15 of the unit of unloading where the higher tank car of pressure is opened,
The portion gas in tank car for keeping pressure high successively enters other pressures through gas phase pipeline 18, gas phase branch 14 and tank car gas phase pipe 25
In the tank car of the too low unit of unloading of power, the tank car of hypotony is pressurized；
Step 3: closing unloading pump 7 and respective valves after unloading, the 4th valve 16 is opened, gas phase pipeline 18 is passed through
Balance the pressure of tank car 1 and storage tank.
Embodiment 3
When storage tank is storage tank with pressure, i.e., when the pressure in storage tank is 0.4MPa~1.0MPa, using the utility model
Device carries out the technique that super-low liquid is unloaded
Step 1: carrying out nitrogen displacement to the air in each pipeline of device；
Step 2: the pressure difference of storage tank Yu tank car 1 is first judged, when the pressure P in storage tank is examined greater than first pressure sensor 5
The pressure P in tank car 1 measured1When, the 4th valve 16 is opened, the pressure of tank car 1 and storage tank is balanced by gas phase pipeline 18, to
After pressure balance, the 4th valve 16 is closed；Super-low liquid in tank car 1 is by unloading pipeline 4 and the first pipeline 19 enters liquid
Then phase branch 17 is introduced into pressurization gasifier 20 and is pressurized to tank car 1, passes through on liquid phase branch 17 second in pressurization
The opening and closing degree control of valve 13 enters the flow of the super-low liquid of pressurization gasifier 20, and the pressure in tank car 1 constantly increases,
Pressure P in the tank car 1 that first pressure sensor 5 detects1Reach 0.4MPa~0.8MPa, while dynamic amount Δ P meets
When the following conditions, the first valve 10 is opened, unloading pump 7 is pre-chilled:
Ps=(λ L/d) ρ v2/2；
Δ P=P1- P=P2-1+Ps；
In formula:
P2-1--- theoretical pressure difference, unit MPa；
P --- the pressure in storage tank, unit MPa；
Ps--- the pressure loss, unit MPa；
The density of ρ --- fluid, unit kg/m3；
ν12--- the speed of tank car liquid outlet fluid, unit m/s；
ν22--- the speed of unloading pump inlet fluid, unit m/s；
ν --- pipeline fluid speed, unit m/s；
gZ1--- the position energy of tank car liquid outlet, unit m2/s2；
gZ2--- the position energy of unloading pump inlet, unit m2/s2；
λ --- pipeline frictional resistant coefficient；
L --- duct length, unit m；
D --- internal diameter of the pipeline, unit m；
When meeting following two condition simultaneously, starting unloading pump 7 is unloaded:
Dynamic amount Δ P=P1- P=P2-1+Ps；
And the first temperature T that detects of temperature sensor 81<-120℃；
During unloading, while unloading pump 7 is unloaded, by adjusting the opening and closing degree of the second valve 13, make in tank car
The some ultra-low geothermal liquid of outflow is introduced into pressurization gasifier 20 by liquid phase branch 17 and is pressurized to tank car, and controls pressurization gasification
Device 20 exports the temperature that second temperature sensor 22 detects and meets the following conditions:
P3=∑ yiPci；
Tc=∑ yiTci；
Δ T=T2-Tc；
Δ T is 278K~298K；
In formula: Ai, Bi, Ci, yi are constant, look into " deep cooling handbook "；
P3--- the pressure that third pressure sensor detects, unit MPa；
Pci--- Various Components In Natural Gas pressure caused by saturation state steam, unit MPa；
Tci--- Various Components In Natural Gas possessed temperature in saturation state, unit K；
Tc——P3The saturation temperature of lower super-low liquid, unit K；
T2--- the temperature that second temperature sensor detects；
It maintains dynamic to measure Δ P simultaneously and meets the following conditions:
Dynamic amount Δ P=P1- P=P2-1+Ps；
The pressure balance between each tank car is controlled by detecting the tank car pressure of each unit of unloading during unloading,
When the tank car hypotony of some unit of unloading, the third valve 15 of the unit of unloading where the higher tank car of pressure is opened,
The portion gas in tank car for keeping pressure high successively enters other pressures through gas phase pipeline 18, gas phase branch 14 and tank car gas phase pipe 25
In the tank car of the too low unit of unloading of power, the tank car of hypotony is pressurized；
Step 3: closing unloading pump 7 and respective valves after unloading, the 4th valve 16 is opened, gas phase pipeline 18 is passed through
Balance the pressure of tank car 1 and storage tank.
Xi'an Qin Hua natural gas LNG emergency peak regulation station carries out tank car using the device and technique of the utility model and unloads, sternly
Lattice are pressurized gasifier exit pressure and temperature according to process flow, the pressure difference of real-time monitoring tank car and storage tank, use pressurization gas
Change device and be pressurized and guarantee to keep between tank car and storage tank certain pressure difference to tank car, and then guarantees unloading pump in optimal fortune
Row state；When the tank car hypotony of some unit of unloading, the portion gas in tank car for keeping pressure high enters other pressure
In the tank car of too low unit of unloading, it is pressurized.Utility model device has highlighted its advantage in the project, passes through
Practical continuous operation data statistics, the average time unloaded every time control at 60 minutes, unload vehicle speed and reached design standard.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to the utility model technical spirit any simple modification, change and equivalence change to the above embodiments, still fall within
In the protection scope of technical solutions of the utility model.
Claims (5)
1. a kind of multi-arm intelligence super-low liquid unloading unit, which is characterized in that including storage tank and multiple units of unloading, Mei Gesuo
Stating unit of unloading includes tank car (1), cryogenic pump sled (2) and pressurization gasifier (20), is provided with tank car liquid phase on the tank car
Interface, tank car gas phase interface and boost fluid interfaces, the cryogenic pump sled (2) includes unloading oil filling riser liquid phase arm (3), pipeline of unloading
(4), unloading oil filling riser gas phase arm (24) and gas phase pipeline (18), the tank car liquid phase interface by unloading oil filling riser liquid phase arm (3) with
It unloads one end connection of pipeline (4), the other end of pipeline of unloading (4) connect with storage tank liquid phase general pipeline (11), the tank car gas phase
Interface is connect by unloading oil filling riser gas phase arm (24) with one end of gas phase pipeline (18), the other end and storage tank of gas phase pipeline (18)
Gas phase general pipeline (12) connection is interfaced between storage tank liquid phase general pipeline (11) on the pipeline of unloading (4) from tank car liquid phase and successively sets
It is equipped with first pressure sensor (5), unloading pump (7), the first temperature sensor (8), second pressure sensor (9) and the first valve
(10), on the pipeline of unloading (4) and the position between second pressure sensor (9) and the first valve (10) is provided with liquid
One end of phase branch (17), the liquid phase branch (17) is connect with pipeline of unloading (4), the other end of liquid phase branch (17) and pressurization
The inlet of gasifier (20) connects, and the gas outlet of pressurization gasifier (20) passes through the second pipeline (21) and gas phase pipeline
(18) it connects, the boost fluid interfaces are connect by the first pipeline (19) with liquid phase branch (17), the liquid phase branch (17)
On be provided with the second valve (13), on the gas phase pipeline (18) close to tank car gas phase interface position be provided with second temperature biography
Sensor (22) and third pressure sensor (23)；It is provided with gas phase branch (14) on the gas phase pipeline (18), the gas phase branch
The one end on road (14) connects with gas phase pipeline (18), and the other end of gas phase branch (14) connects tank car gas phase pipe (25), the slot
Vehicle gas phase pipe (25) connects with the tank car gas phase interface for unit of each unloading, and gas phase branch is provided with third valve on (14)
(15)。
2. a kind of multi-arm intelligence super-low liquid unloading unit according to claim 1, which is characterized in that the gas phase pipe
Position on road (18) and between gas phase branch (14) and storage tank gas phase general pipeline (12) is provided with the 4th valve (16).
3. a kind of multi-arm intelligence super-low liquid unloading unit according to claim 2, which is characterized in that further include control
System, the control system include PLC controller (6) and the power supply for the power supply of each power unit, each unit of unloading
First pressure sensor (5), the first temperature sensor (8), second pressure sensor (9), second temperature sensor (22) and
Three pressure sensors (23) are connect with the input terminal of PLC controller (6), the unloading pump (7) of each unit of unloading, first
Valve (10), the second valve (13), third valve (15) and the 4th valve (16) are connect with the output end of PLC controller (6).
4. a kind of multi-arm intelligence super-low liquid unloading unit according to claim 1, which is characterized in that the pipe of unloading
Position on road (4) close to storage tank liquid phase general pipeline (11) is provided with first check-valve (26).
5. a kind of multi-arm intelligence super-low liquid unloading unit according to claim 4, which is characterized in that the liquid phase branch
Road (17) and be located at the second valve (13) downstream be provided with second check-valve (27).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2019201758700 | 2019-01-31 | ||
| CN201920175870 | 2019-01-31 |
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| CN209511606U true CN209511606U (en) | 2019-10-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237635A (en) * | 2020-03-09 | 2020-06-05 | 江苏长隆石化装备有限公司 | Low-temperature tank car loading and unloading pump skid device |
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2019
- 2019-02-19 CN CN201920211703.7U patent/CN209511606U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237635A (en) * | 2020-03-09 | 2020-06-05 | 江苏长隆石化装备有限公司 | Low-temperature tank car loading and unloading pump skid device |
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