CN109019500A - A kind of refueling nozzle improving service station environment - Google Patents
A kind of refueling nozzle improving service station environment Download PDFInfo
- Publication number
- CN109019500A CN109019500A CN201810766121.5A CN201810766121A CN109019500A CN 109019500 A CN109019500 A CN 109019500A CN 201810766121 A CN201810766121 A CN 201810766121A CN 109019500 A CN109019500 A CN 109019500A
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- CN
- China
- Prior art keywords
- rifle
- air valve
- gas
- air
- oil
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses a kind of refueling nozzles for improving service station environment, including oiling gun body, the junction of rifle stick and rifle mouth is provided with air-suction cover, air-suction cover is connected with suction pipe, shield is the air valve for being above provided with control suction pipe on-off, air valve includes air valve shell, air valve stem, reset tension spring and gas valve core, air valve stem upper end is pierced by air valve shell lower end and is provided with gas valve core, waist hole is provided on pull rod, air valve stem upper end is provided with the sliding bar slided in waist hole, pull rod and shield are provided with reset tension spring between, the slideway of gas supply spool sliding is formed in air valve shell, slideway radius is greater than the radius of gas valve core, slide bottom is provided with the air flue less than gas valve core.This kind of refueling nozzle can draw the oil gas spilt into outside fuel tank while oil gun is opened, and be put into service station environment when oil gas is effectively reduced, to effectively improve service station environment, substantially reduce gas concentration, also improve safety.
Description
Technical field
The invention belongs to refueling nozzle technical field, specifically a kind of refueling nozzle for improving service station environment.
Background technique
Fuel charger is the oil transportation measuring equipment directly refueled for motor vehicle.It and oil tank, pipeline, pipe fitting valve etc. constitute
One complete oil supply system.Fuel charger be by oil pump, gs-oil separator, meter, the big assembly of counter four and motor,
Some other component such as refueling nozzle is constituted.
By being typically all to provide the oil pump of oil product by an oil pipe connection, refueling nozzle generally comprises existing refueling nozzle
Rifle stick, rifle mouth, pull rod and shield handle, rifle stick is interior to be equipped with main oil gallery, and the main valve plug of control main oil gallery opening and closing, institute are provided in main oil gallery
It states and is equipped with the first spring between main valve plug upper end and valve deck, the main valve plug lower end is connected with mandril, and mandril extends downwardly rifle stick
Bottom is additionally provided in the rifle stick for preventing the automatic gun stripping mechanism overflowed of refueling, and automatic gun stripping mechanism generally comprises one
A slideway, slideway is interior to be equipped with self-styled bar, and slideway upper end is equipped with an oil pocket, and automatic control film, automatic control are equipped between oil pocket and self-styled bar
Third spring, the oil outlet of the rifle mouth connection rifle stick are equipped between at the top of film and oil pocket, the rifle mouth is equipped with Venturi tube,
Venturi tube is connect with oil pocket, and second spring is equipped between self-styled bar lower end and rifle stick, and rifle stick and pull rod are stretched out in self-styled bar lower end
Rotation connection, when pull rod pull up jack up mandril when rifle stick in oil communication it is fuel-displaced, after fuel tank is filled it up in Venturi tube into
Oil fills oil pocket, and the downward heading tape of self-styled bar can be moved pull rod rotation by the oil pressure in oil pocket, and spool is pushed down on by the first spring at this time
It moves so that the oil circuit in rifle stick blocks, oil during taking out refueling nozzle in oil pocket can drain back to fuel tank again.
Oil gas taste in existing gas station's air is very heavy, not only influences the environment of gas station, for a long time so can be to adding
The health of petrol station staff impacts, and if excessively high gas concentration encounter open fire and will lead to explosion accident.
Summary of the invention
The present invention is in view of the shortcomings of the prior art, provide a kind of refueling nozzle for improving service station environment, this kind of refueling nozzle can
The oil gas spilt into outside fuel tank is drawn while oil gun is opened, and service station environment is put into when oil gas is effectively reduced, thus effectively
Improvement service station environment, substantially reduce gas concentration, also improve safety.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: a kind of improvement gas station ring
The refueling nozzle in border, including oiling gun body, the ontology include rifle stick, rifle mouth, pull rod and shield handle, are equipped with main oil in the rifle stick
Road is provided with the main valve plug for controlling the main oil gallery opening and closing in the main oil gallery, is equipped between the main valve plug upper end and valve deck
First spring, the main valve plug lower end are connected with mandril, and the mandril extends downwardly rifle stick bottom, is additionally provided in the rifle stick
Automatic gun stripping mechanism for preventing from overflowing, the automatic gun stripping mechanism include a slideway, are equipped with self-styled bar in the slideway,
The slideway upper end is equipped with an oil pocket, and automatic control film, the automatic control film and the oil pocket are equipped between the oil pocket and self-styled bar
Third spring is equipped between top, the rifle mouth connects the oil outlet of the rifle stick, and the rifle mouth is equipped with Venturi tube, described
Venturi tube is connect with the oil pocket, and second spring, the rifle stick and institute are equipped between the self-styled bar lower end and the rifle stick
The junction for stating rifle mouth is provided with air-suction cover, and the air-suction cover is connected with suction pipe, and the shield is being above provided with described in control
The air valve of suction pipe on-off, the air valve include air valve shell, air valve stem, reset tension spring and gas valve core, on the air valve stem
End is pierced by the air valve shell lower end and is provided with the gas valve core, waist hole is provided on the pull rod, the air valve stem upper end is set
It is equipped with the sliding bar slided in the waist hole, the pull rod and the shield and is provided with the reset tension spring, the gas between
The slideway of gas supply spool sliding is formed in valve chest, the slideway radius is greater than the radius of the gas valve core, the slideway bottom
Portion is provided with the air flue less than gas valve core.When in use using this kind of refueling nozzle, suction pipe is connected with air pump, the energy when refueling
Air valve is enough automatically turned on, the oil gas overflowed in fuel tank is siphoned away, so that hydrocarbon content reduces in environment in gas station, guarantees work
The health and raising safety of personnel.
In above-mentioned technical proposal, it is preferred that the refueling nozzle includes several oiling gun bodies overlapped in parallel, several described
Self-styled bar lower end is rotatablely connected after stretching out rifle stick with a connection frame, and the connection frame rear end is provided with the pull rod, the company
It connects and forms horizontal concrete chute in the middle part of frame, slided side by side in the sliding slot and be provided with several sliding blocks, before the sliding block and the sliding slot
Tension spring is provided between end face, bending is provided with extension rod on each sliding block, and the extension rod passes through the air-suction cover
The junction of the rifle stick and the rifle mouth is extended close to, the same position on each sliding block is provided with for the mandril
Across through-hole, when the tension spring nature, several mandrils with the through-hole alignment.This kind of refueling nozzle and fuel tank
Oil filler cooperates, and the block cooperated in extension rod is equipped at this kind of oil filler, the position of the model setting block to refuel as needed
It sets, when refueling, the rifle mouth of refueling nozzle extend into oil filler, and block, which will push, wherein one to be moved to be added with it with extension rod
The position that can be jacked up of the corresponding mandril of oil product, the mandril for the oil product for then pulling pull rod that it to be added is raised, this
The corresponding main oil gallery connection of the automobile oil product to be added is refueled, and effectively prevent oil product accidentally to add using this kind of refueling nozzle, and every
It is secondary all only to need to refuel using same oil gun；This kind of refueling nozzle mandril when vacant is directed at through-hole simultaneously, even if pulling
Knob will not cause fuel-displaced, prevent maloperation, while multiple oil guns being merged so that refueling more convenient.
In above-mentioned technical proposal, it is preferred that the connection frame is equipped with shaft, and the shaft passes through several self-styled bars
Rotation connection.
In above-mentioned technical proposal, it is preferred that be connected with gag lever post by torsional spring on the pull rod, the shield is being above provided with
For limiting several retention beads of the gag lever post.Being made using the structure can be solid by gag lever post after pull rod lifts
Surely pull rod is lived, is not needed during oiling hand steered, realizes automatic oiling.
In above-mentioned technical proposal, it is preferred that the refueling nozzle includes the two oiling gun bodies overlapped in parallel, the sliding slot
Inside there are two sliding blocks for sliding setting side by side.
Compared with prior art, the present invention have the following beneficial effects: that the oil filler of this kind of refueling nozzle and fuel tank cooperates, it should
It is equipped with the block cooperated in extension rod at kind oil filler, the position of the model setting block to refuel as needed adds when refueling
The rifle mouth of oil gun extend into oil filler, block will push wherein one with extension rod is moved to it to be added oil product corresponding top
The mandril of the position that bar can be jacked up, the oil product for then pulling pull rod that it to be added is raised, the automobile oil product to be added
The connection of corresponding main oil gallery is refueled, effectively prevent oil product accidentally using this kind of refueling nozzle plus, and only need every time using
Same oil gun can refuel；This kind of refueling nozzle mandril when vacant is directed at through-hole simultaneously, will not cause pulling knob
It is fuel-displaced, maloperation is prevented, while multiple oil guns being merged so that refueling more convenient.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the embodiment of the present invention one.
Fig. 2 is the cross-sectional view of tension spring in the raw at connection frame in the embodiment of the present invention one.
Fig. 3 is the cross-sectional view that tension spring is stretched at connection frame in the embodiment of the present invention one.
Fig. 4 is the top view of tension spring in the raw at connection frame in the embodiment of the present invention one.
Fig. 5 is the top view that tension spring is stretched at connection frame in the embodiment of the present invention one.
Fig. 6 is the top view that tension spring is stretched at connection frame in the embodiment of the present invention two.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing: referring to Fig. 1 to Fig. 5, implementing
Example one, a kind of refueling nozzle improving service station environment, including oiling gun body 1, the ontology 1 include rifle stick 2, rifle mouth 3, pull rod
4 and shield 5, main oil gallery 6 is equipped in the rifle stick 2, the main valve for controlling the opening and closing of main oil gallery 6 is provided in the main oil gallery 6
Core 7 is equipped with the first spring 9 between 7 upper end of main valve plug and valve deck 8,7 lower end of main valve plug is connected with mandril 10, described
Mandril extends downwardly 2 bottom of rifle stick, be additionally provided in the rifle stick 2 for prevent overflow automatic gun stripping mechanism 11, it is described from
Dynamic gun stripping mechanism 11 includes a slideway 12, and self-styled bar 13 is equipped in the slideway 12, and 12 upper end of slideway is equipped with an oil
Chamber 14, is equipped with automatic control film 15 between the oil pocket 14 and self-styled bar 13, the automatic control film 15 and the oil pocket are set between 14 top
There is third spring 16, the rifle mouth 3 connects the oil outlet of the rifle stick 2, and the rifle mouth 2 is equipped with Venturi tube 17, the text
Venturi 17 is connect with the oil pocket 14, and second spring 18, the rifle are equipped between self-styled 13 lower end of bar and the rifle stick 2
The junction of stick 2 and the rifle mouth 3 is provided with air-suction cover 29, and the air-suction cover 29 is connected with suction pipe 30, and the shield is on 5
It is provided with the air valve 31 for controlling 30 on-off of suction pipe, the air valve 31 includes air valve shell 32, air valve stem 33, resets and draw
Spring 34 and gas valve core 35,33 upper end of air valve stem is pierced by 32 lower end of air valve shell and is provided with the gas valve core 35, described
Waist hole 36 is provided on pull rod 4,33 upper end of air valve stem is provided with the sliding bar 37 slided in the waist hole 36, the drawing
Bar 4 and the shield are formed with the cunning that gas supply spool slides the reset tension spring 34 is provided between 5 in the air valve shell 32
Road 38,38 radius of slideway are greater than the radius of the gas valve core 35, and 38 bottom of slideway is provided with less than gas valve core 35
Air flue 39.When in use using this kind of refueling nozzle, suction pipe is connected with air pump, and when refueling, pull rod is above mentioned so that air valve is opened
Open, the oil gas overflowed in fuel tank siphoned away so that in gas station in environment hydrocarbon content reduce, guarantee staff health with
And safety is improved, reset tension spring is by knob drop-down so that gas valve core blocks air flue and stops suction after adding oil.
The refueling nozzle 0 includes several oiling gun bodies 1 overlapped in parallel, and rifle stick is stretched out in several self-styled 13 lower ends of bar
It is rotatablely connected afterwards with a connection frame 19,19 rear end of connection frame is provided with the pull rod 4, is formed in the middle part of the connection frame 19
Horizontal concrete chute 20, sliding is provided with several sliding blocks 21, the front end of the sliding block 21 and the sliding slot 20 side by side in the sliding slot 20
Tension spring 22 is provided between face, bending is provided with extension rod 23 on each sliding block 21, and the extension rod 23 passes through described
Air-suction cover 29 extends close to the junction of the rifle stick 2 and the rifle mouth 3, the same position setting on each sliding block 21
Have for the mandril 10 pass through through-hole 24, when 22 nature of tension spring, several mandrils 10 with the through-hole 24
Alignment.In the present embodiment, the connection frame 19 is equipped with shaft 25, and the shaft 25 passes through several self-styled rotations of bar 13 and connects
It connects.The refueling nozzle 0 includes the two oiling gun bodies 1 overlapped in parallel, and sliding setting side by side in the sliding slot 20, there are two sliding
Block 21.The oil filler of this kind of refueling nozzle and fuel tank cooperates, and the block cooperated in extension rod is equipped at this kind of oil filler, as needed
The position of the model setting block of oiling, when refueling, the rifle mouth of refueling nozzle extend into oil filler, block will push wherein one with
Extension rod is moved to position that mandril corresponding with the oil product that it to be added can be jacked up, then pulls pull rod that it to be added
The mandril of oil product be raised, the corresponding main oil gallery connection of the automobile oil product to be added is refueled, and is had using this kind of refueling nozzle
Effect prevents oil product from accidentally adding, and only needs to refuel using same oil gun every time；This kind of refueling nozzle pushes up when vacant simultaneously
Bar is directed at through-hole, will not cause fuel-displaced pulling knob, prevent maloperation, while multiple oil guns being merged so that refueling
It is more convenient.
In the present embodiment, gag lever post 27 is connected with by torsional spring 26 on the pull rod 4, the shield is used for being provided on 5
Limit several retention beads 28 of the gag lever post 27.Being made using the structure can be solid by gag lever post after pull rod lifts
Surely pull rod is lived, is not needed during oiling hand steered, realizes automatic oiling.
Referring to Fig. 6, embodiment two, embodiment two and the difference of embodiment one are, refueling nozzle 0 includes three overlapped in parallel
A oiling gun body 1, there are three sliding blocks 21 for sliding setting side by side in the sliding slot 20.
Can certainly have refueling nozzle 0 may include the oiling gun body 1 more overlapped in parallel, can slide side by side in sliding slot
More sliding blocks are provided with, principle is all the same.
Claims (5)
1. a kind of refueling nozzle for improving service station environment, including oiling gun body (1), the ontology (1) they include rifle stick (2), rifle
(5), the rifle stick (2) is interior to be equipped with main oil gallery (6) for mouth (3), pull rod (4) and shield, and control institute is provided in the main oil gallery (6)
The main valve plug (7) for stating main oil gallery (6) opening and closing is equipped with the first spring (9) between main valve plug (7) upper end and valve deck (8), described
Main valve plug (7) lower end is connected with mandril (10), and the mandril extends downwardly rifle stick (2) bottom, is additionally provided in the rifle stick (2)
Automatic gun stripping mechanism (11) for preventing from overflowing, the automatic gun stripping mechanism (11) include a slideway (12), the slideway
(12) self-styled bar (13) are equipped in, slideway (12) upper end is equipped with an oil pocket (14), the oil pocket (14) and self-styled bar
(13) automatic control film (15) are equipped between, are equipped with third spring (16) between the automatic control film (15) and the oil pocket (14) top,
The rifle mouth (3) connects the oil outlet of the rifle stick (2), and the rifle mouth (2) is equipped with Venturi tube (17), the Venturi tube
(17) it is connect with the oil pocket (14), is equipped with second spring (18) between self-styled bar (13) lower end and the rifle stick (2),
Be characterized in that: the junction of the rifle stick (2) and the rifle mouth (3) is provided with air-suction cover (29), air-suction cover (29) connection
Have suction pipe (30), is provided with the air valve (31) for controlling suction pipe (30) on-off, the air valve on the shield handle (5)
It (31) include air valve shell (32), air valve stem (33), reset tension spring (34) and gas valve core (35), air valve stem (33) upper end is worn
Air valve shell (32) lower end is provided with the gas valve core (35) out, is provided with waist hole (36), the gas on the pull rod (4)
Valve rod (33) upper end is provided with the sliding bar (37) slided in the waist hole (36), the pull rod (4) and shield handle (5) it
Between be provided with the reset tension spring (34), the slideway (38) of gas supply spool sliding is formed in the air valve shell (32), it is described
Slideway (38) radius is greater than the radius of the gas valve core (35), and slideway (38) bottom is provided with the gas less than gas valve core (35)
Road (39).
2. a kind of refueling nozzle for improving service station environment as described in claim 1, it is characterised in that: refueling nozzle (0) packet
Include several oiling gun bodies (1) overlapped in parallel, several self-styled bar (13) lower ends stretch out after rifle sticks with a connection frame
(19) it is rotatablely connected, connection frame (19) rear end is provided with the pull rod (4), is formed in the middle part of the connection frame (19) laterally sliding
Slot (20), the interior sliding side by side of the sliding slot (20) are provided with several sliding blocks (21), the sliding block (21) and the sliding slot (20)
It is provided between front end face tension spring (22), equal bending is provided with extension rod (23), the extension rod on each sliding block (21)
(23) junction that the air-suction cover (29) extend close to the rifle stick (2) and the rifle mouth (3), each sliding block are passed through
(21) same position on, which is provided with, passes through through-hole (24) for the mandril (10), when the tension spring (22) nature, if
The mandril (10) is done to be aligned with the through-hole (24).
3. a kind of refueling nozzle for improving service station environment as claimed in claim 2, it is characterised in that: on the connection frame (19)
Equipped with shaft (25), the shaft (25) passes through several self-styled bar (13) rotation connections.
4. a kind of refueling nozzle for improving service station environment as described in claim 1, it is characterised in that: lead on the pull rod (4)
Torsional spring (26) is crossed to be connected with gag lever post (27), it is described to protect several limits being provided on (5) for limiting the gag lever post (27)
Position is raised (28).
5. a kind of refueling nozzle for improving service station environment as claimed in claim 2, it is characterised in that: refueling nozzle (0) packet
The two oiling gun bodies (1) overlapped in parallel are included, sliding setting side by side in the sliding slot (20), there are two sliding block (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810766121.5A CN109019500B (en) | 2018-07-12 | 2018-07-12 | Fuel truck nozzle for improving environment of gas station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810766121.5A CN109019500B (en) | 2018-07-12 | 2018-07-12 | Fuel truck nozzle for improving environment of gas station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109019500A true CN109019500A (en) | 2018-12-18 |
| CN109019500B CN109019500B (en) | 2020-11-20 |
Family
ID=64642422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810766121.5A Active CN109019500B (en) | 2018-07-12 | 2018-07-12 | Fuel truck nozzle for improving environment of gas station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109019500B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2573470Y (en) * | 2002-09-30 | 2003-09-17 | 雷斌蕃 | Automatic blowout preventing bubbleless oiling gun |
| CN2704513Y (en) * | 2004-04-30 | 2005-06-15 | 葛爱乐 | Self-sealing fuel charging gun for oil-gas recovery |
| CN201292249Y (en) * | 2008-10-17 | 2009-08-19 | 浙江麦得机器有限公司 | Self-sealing greasing gun for recycling oil gas |
| CN202849046U (en) * | 2012-10-17 | 2013-04-03 | 中国石油化工股份有限公司 | Energy-saving oil vapor recovery oil gun |
| CN203529917U (en) * | 2013-11-07 | 2014-04-09 | 温州正凌机械制造有限公司 | Self-sealed fuelling nozzle having oil vapor recovery and pressure relief functions |
| CN104211008A (en) * | 2014-09-18 | 2014-12-17 | 青岛润鑫伟业科贸有限公司 | Oil gas recovery type fueling gun |
-
2018
- 2018-07-12 CN CN201810766121.5A patent/CN109019500B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2573470Y (en) * | 2002-09-30 | 2003-09-17 | 雷斌蕃 | Automatic blowout preventing bubbleless oiling gun |
| CN2704513Y (en) * | 2004-04-30 | 2005-06-15 | 葛爱乐 | Self-sealing fuel charging gun for oil-gas recovery |
| CN201292249Y (en) * | 2008-10-17 | 2009-08-19 | 浙江麦得机器有限公司 | Self-sealing greasing gun for recycling oil gas |
| CN202849046U (en) * | 2012-10-17 | 2013-04-03 | 中国石油化工股份有限公司 | Energy-saving oil vapor recovery oil gun |
| CN203529917U (en) * | 2013-11-07 | 2014-04-09 | 温州正凌机械制造有限公司 | Self-sealed fuelling nozzle having oil vapor recovery and pressure relief functions |
| CN104211008A (en) * | 2014-09-18 | 2014-12-17 | 青岛润鑫伟业科贸有限公司 | Oil gas recovery type fueling gun |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109019500B (en) | 2020-11-20 |
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Effective date of registration: 20200730 Address after: 317000 No.41, Xunjiansi village, Jiantiao Town, Sanmen County, Linhai City, Taizhou City, Zhejiang Province Applicant after: Zhu Shuanghai Address before: 310016 No. 66 Xuezheng Street, Jianggan District, Hangzhou City, Zhejiang Province Applicant before: Han Shuaifei |
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Effective date of registration: 20201104 Address after: No. 39, Pingshan North Road, Gulou District, Xuzhou City, Jiangsu Province Applicant after: Xuzhou xuanke Agricultural Machinery Co.,Ltd. Address before: 317000 No.41, Xunjiansi village, Jiantiao Town, Sanmen County, Linhai City, Taizhou City, Zhejiang Province Applicant before: Zhu Shuanghai |
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Effective date of registration: 20211229 Address after: 211200 No. 8, Yihu Road, Lishui Economic Development Zone, Lishui District, Nanjing City, Jiangsu Province Patentee after: Jiangsu Tianlan Intelligent Equipment Co.,Ltd. Address before: 221140 No.39, Pingshan North Road, Gulou District, Xuzhou City, Jiangsu Province (a1-187, Guishan Folk Museum Cultural Park) Patentee before: Xuzhou xuanke Agricultural Machinery Co.,Ltd. |
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