CN208169994U - A kind of LNG vaporization device - Google Patents
A kind of LNG vaporization device Download PDFInfo
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- CN208169994U CN208169994U CN201820414731.4U CN201820414731U CN208169994U CN 208169994 U CN208169994 U CN 208169994U CN 201820414731 U CN201820414731 U CN 201820414731U CN 208169994 U CN208169994 U CN 208169994U
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- lng
- pipeline
- condenser
- evaporator
- working substance
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- 230000008016 vaporization Effects 0.000 title claims abstract description 49
- 238000009834 vaporization Methods 0.000 title claims abstract description 48
- 239000000126 substance Substances 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 38
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 11
- 239000012043 crude product Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 239000003949 liquefied natural gas Substances 0.000 description 67
- 239000007789 gas Substances 0.000 description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 238000012546 transfer Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical compound O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
This application provides a kind of LNG vaporization devices, including pedestal, first support, second support, fluid working substance pipeline, evaporator and condenser, first support, second support is set on pedestal, it is respectively used to fixed evaporator and condenser, fluid working substance pipeline and evaporator, condenser connection, fluid working substance pipeline is used for the trandfer fluid working medium between evaporator and condenser, fluid working substance is gas working medium or liquid working substance, circulation has heat medium in evaporator, evaporator is used to that liquid working substance to be heated to be gas working medium by heat medium, circulation has LNG in condenser, condenser is used to gas working medium being condensed into liquid working substance, make LNG vaporization NG.The application LNG vaporization device, vaporization effect is good, and vaporization efficency is high, reduces conduit volume, reduces operating cost and structure is simple, compact, compact, easy to operate, reliable operation, safety coefficient is high, and versatile, use scope is wide.
Description
Technical field
This application involves technical field of LNG more particularly to a kind of LNG vaporization devices.
Background technique
In face of global energy crisis, environmental pollution and climatic issues, country advocates energetically and promotes the use of clean energy, substitutes
The energy and new energy.Natural gas (Natural Gas, NG) is as a kind of high-quality, efficient and environmentally friendly energy increasingly by blueness
It looks at.
Natural gas under room temperature is gas, and storage or long distance transportation are relatively difficult, mined natural gas through desulfurization,
Natural gas is cooled to -162 DEG C, is obtained by a series of purified treatments such as dehydration, de- heavy hydrocarbon, de- sour gas using cryogenics
Liquefied natural gas (Liquefied Natural Gas, LNG).LNG is colourless, tasteless, nontoxic and non-corrosive, and volume subtracts significantly
Few, the weight that volume is about 1/600, LNG of same amount gaseous natural gas volume is only 45% or so of androgynous ponding, and liquefy day
Right gas is vaporized into gaseous state just as fuel requirement and can be used.
The mode of existing LNG vaporization can be divided into three kinds according to heat source difference：(1) technique vaporizes, and heat source comes from other heat
Dynamic process or chemical process；(2) environment vaporizes, directly using atmosphere, seawater or GEOTHERMAL WATER etc. as heat source；(3) vapour is heated
Change.That there are heating methods is single for above-mentioned vaporization mode, and heating device volume is big, and heat exchange efficiency is low and heat energy is using not enough filling
The problem of dividing.
Therefore, how to be directed to disadvantage present in the above-mentioned prior art and carry out research and development improvement, actually exerted needed for relevant industry
Power research and development target, the application designer in view of this, be think and creation idea, designed then with the experience of many years, pass through
In many ways sampling test is inquired into and is studied, and repeatedly amendment improvement, be releasing the application.
Such as application No. is：201410098308.4 Chinese patent disclose a kind of LNG vaporization device and feeder,
Including vaporizer and surge tank；Vaporizer includes outer housing, two side seal boards, heat exchange gas-guide tube, water inlet and water outlet, shell
Body and two side seal boards surround heat transfer space, and water inlet and water outlet are respectively communicated to heat transfer space, and heat exchange gas-guide tube, which runs through, to be changed
Heat space；Surge tank includes that outer housing and two side seal boards, inside surround cushion space；Vaporizer and surge tank share a side seal
Plate, heat exchange gas-guide tube gas outlet are connected to cushion space.This application realizes liquid by the way that heat exchange gas-guide tube is arranged in vaporizer
Change the vaporization of natural gas, but the heat exchange efficiency of this application heat exchange gas-guide tube is low and heat energy service efficiency is lower.
Application No. is：201180054040.9 Chinese patent discloses a kind of LNG vaporization equipment, including for nitrogen device,
Heater, gasifier and recirculation line, this application can be to LNG gasification, but the equipment has for nitrogen device and for nitrogen pipeline,
It needs that nitrogen is used to improve operation cost using being more troublesome as heat source.
Application No. is：200620000442.7 Chinese patent disclose a kind of liquefied natural gas vaporizing apparatus, the liquid
Outlet, entrance and the intermediate heating agent supply system in state area are tightly connected, and intermediate heating agent supply system includes intermediate heating agent storage
Tank, intermediate heating agent delivery pump and pipeline and valve, although this application improves the heat exchange of vapourizing unit according to the heat transfer of thermal medium
Performance, but the device is provided with heating agent delivery pump and valve, and the volume of whole device is larger, inconvenient for use.
Utility model content
(1) technical problems to be solved
In view of above-mentioned technical problem, this application provides a kind of compact-sized, compact, vaporization efficency is high, exchanged heat
The LNG vaporization device that journey can carry out automatically, property easy to use, safe is good, high reliablity and operation cost are low.
(2) technical solution
This application provides a kind of LNG vaporization device, including pedestal, first support, second support, fluid working substance pipeline,
Evaporator and condenser, the first support, the second support are set on the pedestal, are respectively used to fix the evaporation
Device and the condenser,
The fluid working substance pipeline is connect with the evaporator, the condenser, and the fluid working substance pipeline is used in institute
State trandfer fluid working medium between evaporator and the condenser, the fluid working substance is gas working medium or liquid working substance,
Circulation has a heat medium in the evaporator, and the evaporator is used for the liquid work through the heat medium
Matter is heated to be the gas working medium,
Circulation has LNG in the condenser, and the condenser is used to the gas working medium being condensed into the liquid working substance,
Make the LNG vaporization NG.
In some embodiments of the present application, the fluid working substance pipeline includes gas working medium pipeline and liquid working substance pipe
Road, the top of evaporator and the top of the condenser described in the gas working medium pipeline connection, the liquid working substance pipeline connect
Lead to the bottom of the evaporator and the bottom of the condenser.
In some embodiments of the present application, the fluid working substance is heat pipe phase-change working substance.
In some embodiments of the present application, the evaporator includes evaporator shell and the liquid in evaporator shell
Body working medium pipeline, the heat medium circulate in the space in the evaporator shell with formation outside the liquid working substance pipeline
It is interior, the liquid working substance pipeline and the gas working medium pipeline, the liquid working substance pipeline connection.
It is respectively arranged with heating medium inlet in some embodiments of the present application, on evaporator shell and heat medium goes out
Mouthful, the size of the heating medium inlet is greater than the size of the Crude product input.
In some embodiments of the present application, the heat medium is water.
In some embodiments of the present application, the condenser center of gravity is higher than the evaporator center of gravity.
In some embodiments of the present application, the condenser includes condenser casing and in condenser casing
LNG pipeline, the LNG stream pass through in the LNG pipeline, the gas working medium circulate in the condenser casing with it is described
In the space formed outside LNG pipeline.
In some embodiments of the present application, LNG entrance and the outlet NG are respectively arranged on the condenser casing, it is described
LNG entrance, the outlet the NG are connected to the LNG pipeline respectively, and the LNG entrance is described for being connected to LNG feedway
NG is exported for being connected to NG storage tank.
In some embodiments of the present application, the LNG pipeline is helical pipe.
(3) beneficial effect
It can be seen from the above technical proposal that the application at least has the advantages that one of them：
(1) LNG vaporization device provided by the present application, fluid working substance are heat pipe phase-change working substance, and thermal resistance is small, low in energy consumption, and same
The water-ethylene glycol of sample Unit Weight is easy to compare, and can transmit the heat of several orders of magnitude, vaporization effect is good, vaporization efficency more
It is high；
(2) LNG vaporization device provided by the present application, the evaporation in fluid working substance cyclic process, on fluid working substance pipeline
The phenomenon that end and the condensation end temperature difference are smaller, are not in the temperature decrease after LNG heat exchange, fluid working substance pipeline safety is higher simultaneously
And have the advantages that corrosion-resistant ageing-resistant；
(3) LNG vaporization device provided by the present application, fluid working substance under the effect of gravity can automatic cycle so that entirely
Vapourizing unit can save the components such as water pump, water tank, valve, reduce conduit volume, reduce pipeline occupied space；
(4) LNG vaporization device provided by the present application, condenser center of gravity are higher than the evaporator center of gravity, so that entire vaporization
Device heat transfer effect is more preferable, and heat exchange efficiency is higher；
(5) LNG vaporization device provided by the present application, heat medium are water, can reduce operating cost and environmental protection；
(6) LNG vaporization device provided by the present application, structure is simple, compact, compact, easy to operate, reliable operation,
Safety coefficient is high, and versatile, use scope is wide.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application LNG vaporization device；
Fig. 2 is the top view of Fig. 1.
【The application main element symbol description】
1, pedestal；2, first support；3, second support；4, fluid working substance pipeline；41, gas working medium pipeline；42, liquid work
Matter pipeline；5, evaporator；51, heating medium inlet；52, Crude product input；6, condenser；61, LNG entrance；62, NG goes out
Mouthful.
Specific embodiment
This application provides a kind of compact-sized, compact, vaporization efficency is high, heat transfer process can carry out automatically, make
With the LNG vaporization device convenient, safety is good, high reliablity and operation cost are low.
For the purposes, technical schemes and advantages of the application are more clearly understood, below in conjunction with specific embodiment, and reference
The application is further described in attached drawing.
Embodiment one
As depicted in figs. 1 and 2, a kind of LNG vaporization device, including pedestal 1, first support 2, second are present embodiments provided
Bracket 3, fluid working substance pipeline 4, evaporator 5 and condenser 6, the first support 2, the second support 3 are set to the bottom
On seat 1, it is respectively used to fix the evaporator 5 and the condenser 6, the fluid working substance pipeline 4 and the evaporator 5, institute
The connection of condenser 6 is stated, the fluid working substance pipeline 4 is used for the trandfer fluid work between the evaporator 5 and the condenser 6
Matter, the fluid working substance are gas working medium or liquid working substance, and circulation has heat medium in the evaporator 5, and the evaporator 5 is used
In the liquid working substance is heated to be the gas working medium by the heat medium, circulation has LNG in the condenser 6, institute
Condenser 6 is stated for the gas working medium to be condensed into the liquid working substance, makes the LNG vaporization NG, the LNG vapour of the application
It is simple to change apparatus structure, compact, compact, easy to operate, reliable operation, safety coefficient is high, versatile, use scope
Extensively.
Embodiment two
Present embodiments provide a kind of LNG vaporization device, including pedestal 1, first support 2, second support 3, fluid working substance
Pipeline 4, evaporator 5 and condenser 6, the fluid working substance pipeline 4 include gas working medium pipeline 41 and liquid working substance pipeline 42, institute
It states gas working medium pipeline 41 and is connected to the top of the evaporator 5 and the top of the condenser 6, the liquid working substance pipeline 42 connects
Lead to the bottom of the evaporator 5 and the bottom of the condenser 6.
The evaporator 5 includes evaporator shell and the liquid working substance pipeline in the evaporator shell, described to add
Medium passing is in the space formed outside in the evaporator shell with the liquid working substance pipeline.
Heating medium inlet 51 and Crude product input 52, the heat medium are respectively arranged on the evaporator shell
The size of entrance 51 is greater than the size of the Crude product input 52.
The condenser 6 includes that condenser casing and the LNG pipeline in condenser casing, the LNG stream pass through institute
It states in LNG pipeline, the gas working medium circulates in the space formed outside in the condenser casing with the LNG pipeline.
LNG entrance 61 and the outlet NG 62 are respectively arranged on the condenser casing, the LNG entrance 61, the NG go out
Mouth 62 is connected to the LNG pipeline respectively, and for being connected to LNG feedway, the outlet NG 62 is used for the LNG entrance 61
It is connected to NG storage tank.Evaporation ends and the condensation end temperature difference on fluid working substance pipeline are smaller, be not in LNG heat exchange after temperature it is rapid
The phenomenon that drop, fluid working substance pipeline safety is higher and has the advantages that corrosion-resistant ageing-resistant.
Embodiment three
Present embodiments provide a kind of LNG vaporization device, including pedestal 1, first support 2, second support 3, fluid working substance
Pipeline 4, evaporator 5 and condenser 6,6 center of gravity of condenser are higher than 5 center of gravity of evaporator.
The fluid working substance pipeline 4 includes gas working medium pipeline 41 and liquid working substance pipeline 42, the gas working medium pipeline
The top of the 41 connection evaporators 5 and the top of the condenser 6, the liquid working substance pipeline 42 are connected to the evaporator 5
Bottom and the condenser 6 bottom.
The fluid working substance is heat pipe phase-change working substance, and thermal resistance is small, low in energy consumption, is held with the water-ethylene glycol of same Unit Weight
It easily compares, the heat of several orders of magnitude can be transmitted more, vaporization effect is good, and vaporization efficency is high, and fluid working substance is under the effect of gravity
Can automatic cycle, allow entire vapourizing unit to save the components such as water pump, water tank, valve, reduce conduit volume, reduce
Pipeline occupied space.
The evaporator 5 includes evaporator shell and the liquid working substance pipeline in evaporator shell, and the heating is situated between
Mass flow passes through in the space formed outside in the evaporator shell with the liquid working substance pipeline, the liquid working substance pipeline and institute
Gas working medium pipeline 41, the liquid working substance pipeline 42 connection are stated, can make heat medium and liquid working substance pipeline abundant in this way
Contact increases heat exchange area, improves heat transfer effect, enhances heat exchange efficiency.
Heating medium inlet 51 and Crude product input 52, the heat medium are respectively arranged on the evaporator shell
The size of entrance 51 is greater than the size of the Crude product input 52.The heat medium is water, can reduce operating cost simultaneously
And environmental protection.
The condenser 6 includes condenser casing and the LNG pipeline in the condenser casing, so that entire vaporization
Device heat transfer effect is more preferable, and heat exchange efficiency is higher, and the LNG stream passes through in the LNG pipeline, and the gas working medium circulates in institute
It states in the space formed outside in condenser casing with the LNG pipeline.The LNG pipeline is helical pipe, increases contact surface
Product, heat exchange efficiency is higher, and heat transfer effect is more preferable.
LNG entrance 61 and the outlet NG 62 are respectively arranged on the condenser casing, the LNG entrance 61, the NG go out
Mouth 62 is connected to the LNG pipeline respectively, and for being connected to LNG feedway, the outlet NG 62 is used for the LNG entrance 61
It is connected to NG storage tank.
The working principle of the application LNG vaporization device is：When work, heat medium, the liquid in liquid working substance pipeline are connected
Body working medium absorbs heat, forms gas working medium, and gas working medium passes through gas working medium Pipe transfer to condenser under gas pressure
It in the space formed outside in shell with LNG pipeline, and exchanges heat with the LNG in LNG pipeline, discharges heat, LNG heat absorption heats up and vapour
Change, gas working medium is condensed into liquid working substance, and liquid working substance passes through liquid working substance pipeline under the effect of gravity and returns to evaporator, again
It starts the cycle over.
So far, attached drawing is had been combined the present embodiment is described in detail.According to above description, those skilled in the art
There should be clear understanding to the application.
It should be noted that in attached drawing or specification text, the implementation for not being painted or describing is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, the above-mentioned definition to each element and method is simultaneously
It is not limited only to various specific structures, shape or the mode mentioned in embodiment.
It should also be noted that, can provide the demonstration of the parameter comprising particular value herein, but these parameters are without definite etc.
In corresponding value, but analog value can be similar in acceptable error margin or design constraint.The side mentioned in embodiment
It is only the direction with reference to attached drawing to term, such as "upper", "lower", "front", "rear", "left", "right" etc., is not used to limit this
The protection scope of application.In addition, unless specifically described or the step of must sequentially occur, the sequences of above-mentioned steps there is no restriction in
It is listed above, and can change or rearrange according to required design.And above-described embodiment can be based on design and reliability
Consider, the collocation that is mixed with each other is used using or with other embodiments mix and match, i.e., the technical characteristic in different embodiments can be with
Freely form more embodiments.
Particular embodiments described above has carried out further in detail the purpose of the application, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not intended to limit this application the foregoing is merely the specific embodiment of the application
Within spirit herein and principle, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the application
Within the scope of shield.
Claims (10)
1. a kind of LNG vaporization device, it is characterised in that：Including pedestal (1), first support (2), second support (3), fluid working substance
Pipeline (4), evaporator (5) and condenser (6), the first support (2), the second support (3) are set to the pedestal (1)
On, it is respectively used to fix the evaporator (5) and the condenser (6),
The fluid working substance pipeline (4) connect with the evaporator (5), the condenser (6), the fluid working substance pipeline (4)
For the trandfer fluid working medium between the evaporator (5) and the condenser (6), the fluid working substance is gas working medium or liquid
Body working medium,
Circulation has a heat medium in the evaporator (5), and the evaporator (5) is used for the liquid through the heat medium
Working medium is heated to be the gas working medium,
Circulation has LNG in the condenser (6), and the condenser (6) is used to the gas working medium being condensed into the liquid work
Matter makes the LNG vaporization NG.
2. LNG vaporization device according to claim 1, it is characterised in that：The fluid working substance pipeline (4) includes gas work
Matter pipeline (41) and liquid working substance pipeline (42), the gas working medium pipeline (41) are connected to top and the institute of the evaporator (5)
The top of condenser (6) is stated, the liquid working substance pipeline (42) is connected to bottom and the condenser (6) of the evaporator (5)
Bottom.
3. LNG vaporization device according to claim 2, it is characterised in that：The fluid working substance is heat pipe phase-change working substance.
4. LNG vaporization device according to claim 2, it is characterised in that：The evaporator (5) include evaporator shell and
Liquid working substance pipeline in the evaporator shell, the heat medium circulates in the evaporator shell and the liquid
In the space formed outside body working medium pipeline, the liquid working substance pipeline and the gas working medium pipeline (41), the liquid working substance
Pipeline (42) connection.
5. LNG vaporization device according to claim 4, it is characterised in that：It is respectively arranged with and adds on the evaporator shell
Thermal medium entrance (51) and Crude product input (52), the size of the heating medium inlet (51) are greater than the heat medium and go out
The size of mouth (52).
6. LNG vaporization device according to claim 5, it is characterised in that：The heat medium is water.
7. LNG vaporization device according to claim 1, it is characterised in that：Condenser (6) center of gravity is higher than the evaporation
Device (5) center of gravity.
8. LNG vaporization device according to claim 7, it is characterised in that：The condenser (6) include condenser casing and
LNG pipeline in the condenser casing, the LNG stream pass through in the LNG pipeline, and the gas working medium circulates in institute
It states in the space formed outside in condenser casing with the LNG pipeline.
9. LNG vaporization device according to claim 8, it is characterised in that：LNG is respectively arranged on the condenser casing
Entrance (61) and the outlet NG (62), the LNG entrance (61), the outlet the NG (62) are connected to the LNG pipeline respectively, described
LNG entrance (61) with LNG feedway for being connected to, and the outlet NG (62) with NG storage tank for being connected to.
10. LNG vaporization device according to claim 9, it is characterised in that：The LNG pipeline is helical pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820414731.4U CN208169994U (en) | 2018-03-25 | 2018-03-25 | A kind of LNG vaporization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820414731.4U CN208169994U (en) | 2018-03-25 | 2018-03-25 | A kind of LNG vaporization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208169994U true CN208169994U (en) | 2018-11-30 |
Family
ID=64374070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820414731.4U Expired - Fee Related CN208169994U (en) | 2018-03-25 | 2018-03-25 | A kind of LNG vaporization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208169994U (en) |
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2018
- 2018-03-25 CN CN201820414731.4U patent/CN208169994U/en not_active Expired - Fee Related
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Granted publication date: 20181130 |