CN106197861B - A kind of composite metal plate leak detection attachment device - Google Patents
A kind of composite metal plate leak detection attachment device Download PDFInfo
- Publication number
- CN106197861B CN106197861B CN201610527458.1A CN201610527458A CN106197861B CN 106197861 B CN106197861 B CN 106197861B CN 201610527458 A CN201610527458 A CN 201610527458A CN 106197861 B CN106197861 B CN 106197861B
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- metal plate
- composite metal
- interface
- way pipe
- clamping ring
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A kind of composite metal plate leak detection attachment device, including three-way pipe (6), vacuum flapper valve (11), connecting line, contraction section (12) and conduit coupling (19)；Three-way pipe first interface (7) is connected by connecting line with vacuum extractor incoming end (15)；Three-way pipe second interface (8) is connected with vacuum flapper valve first interface (12)；Three-way pipe third interface (9) is connected by the connecting line with contraction section (10) with the first incoming end of composite metal plate (16)；The second incoming end of composite metal plate (17) is connected by connecting line with pressure vacuum meter incoming end (18)；Above-mentioned pipeline connection passes through conduit coupling (19) pinch seal.Composite metal plate leak detection attachment device, easy for installation, leakproofness is strong and can will weld the residue discharge generated.
Description
Technical field
The present invention relates to air-tightness detection device, specifically a kind of composite metal plate leak detection attachment device.
Background technology
With economic development and scientific and technological progress, single metal or alloy is difficult to the need for meeting industrial production to material property
Ask, therefore, dissimilar metal with stratiform in conjunction with and the composite metal plate produced come into being, in anti-corrosion, pressure vessel manufacturing, electricity
It builds, numerous industries such as petrochemical industry, medicine, light industry, automobile are applied.
Layer metal composite plate is combined by special preparation for processing by the different metallic plate of two kinds of performances, with
The physical and chemical properties that single metal does not have are obtained, realize the allocation optimum of metal material resource, save precious metal
Material.Complex method usually has Explosion composite, explosion Rolling compund, Rolling compund etc..Roll-bonding method is in the powerful of milling train
Under pressure effect, keep two oxidation on metal surface layer to be composite broken, and generate plastic deformation in entire cross section metal, it is clean
The fresh metal of activation forms planar metallurgical binding under pressure.It can be divided into heat according to whether being heated when Rolling compund
Rolling compound and cold rolling are compound.
Currently, mostly using the compound blank-making method of vacuum greatly in hot-rolling metal composite plate field.It is evacuated to composite billet
Leak detection test must be carried out to composite billet, whether the leakproofness for detecting composite billet is intact, compound to ensure to roll out before operation
Plate has higher recombination rate and combined strength bination.It when being detected to composite billet, often drills, then passes to certain in one end of composite billet
The argon gas of pressure is then smeared in welded joints with suds, will appear bubble if there is air leakage point in the position, the position is necessary
It is repaired.Finally, welding vacuum rivet is also needed in the position of composite billet detection drilling, but due to the argon in composite billet at this time
Gas can not preserve, therefore vacuum rivet weld and connecting line can not carry out leak detection test, once it leaks air a little, it can be right
Product quality impacts.
In view of the above-mentioned problems, the reality that Authorization Notice No. is 202735035 U of CN, authorized announcement date is on 2 13rd, 2013
A kind of quick leak-checking apparatus of metal composite base is disclosed in novel.The device includes three-way pipe and vacuum flapper valve；Three-way pipe
Three nozzles be connected respectively with the first interface of vacuum flapper valve, composite billet and vacuum meter.It is adopted between nozzle and connection structure
It is connected with baffle ring, nut and sealing ring, to ensure air-tightness.The quick leak-checking apparatus, opens up in a whole set of pumped vacuum systems
Bypass, using with compared with high leakproofness can vacuum flapper valve connection wherein, open circuit one end is connect with pumped vacuum systems, closed circuit
The piping connection of one end and argon gas；Vacuum flapper valve is opened when being leaked hunting, is passed through argon gas, to metal composite base and the whole series
Evacuation system carries out inspection of leaking hunting, and closes vacuum flapper valve after no leak source, is vacuumized.The device is by the inspection of composite metal plate
It leaks through journey to be combined into one with vacuum, working efficiency can be improved and ensure that the vacuum degree of metal composite base, to improve
Product quality.
But above-mentioned apparatus is in use, the residue that composite billet interior welds generate is not easy to be discharged in vacuum；And
The sealing structure coordinated using nut and sealing ring is poor with leakproofness when air pressure change.
Therefore, the composite metal plate leak detection connection of the residue discharge of the strong and easy welded generation of a kind of leakproofness easy for installation
Device urgently occurs.
Invention content
The technical problems to be solved by the invention are that existing composite metal plate leak detection attachment device structure is cumbersome for installation, close
The residue that closing property difference and welding generate is not easy to be discharged.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of composite metal plate leak detection attachment device, including：Including three-way pipe, vacuum, connecting line, contraction section and pipe
Pipe connecting.Three-way pipe has three-way pipe first interface, three-way pipe second interface and three-way pipe third interface.Vacuum flapper valve
With vacuum flapper valve first interface and vacuum flapper valve second interface.It is multiple it to be provided with metal in one end soldering of composite metal plate
The first incoming end of plywood；It is provided with the second incoming end of composite metal plate in the other end soldering of composite metal plate.Three-way pipe first
Interface is connected by connecting line with vacuum extractor incoming end, and passes through conduit coupling pinch seal；Three-way pipe second connects
Mouth is connected with vacuum flapper valve first interface, and passes through conduit coupling pinch seal；Three-way pipe third interface is received by having
The connecting line of contracting section is connected with the first incoming end of composite metal plate, and passes through conduit coupling pinch seal.Composite metal plate
Second incoming end is connected by connecting line with pressure vacuum meter incoming end, and passes through conduit coupling pinch seal.
The contraction section is arranged in the outside of the first incoming end of composite metal plate, and the caliber D1 of diastole section is the pipe of contraction section
1.5 times of diameter D2 ~ 3.5 times；The length H2 of transition is 1 times ~ 2.5 times of the caliber D1 of diastole section；The length H1 of contraction section is
1.5 ~ 3 times of the caliber D1 of diastole section.Due to being provided with contraction section on the pipeline being connect with composite metal plate, argon gas is being used
When carrying out leak detection test to composite metal plate, the air pressure of argon gas is more than the air pressure of composite metal plate inside cavity, and contraction section is deposited
So that flow velocity of the argon gas at this is promoted rapidly, is quickly full of the inner cavity of composite metal plate.When vacuumizing, composite metal plate
The air pressure of inside cavity is more than external pressure, and gas is flowed out from composite metal plate inside cavity, due to the presence of contraction section, gas
Flow velocity this it is rapid promoted and form a vacuum area in subsequent widened pipeline, can will be trapped in metal when welding
The residue of the inner cavity of composite plate is sucked out together, promotes the quality of composite metal plate.
The pipeline being connected with the first incoming end of composite metal plate, inner wall bottom end surface are not higher than under composite metal plate cavity
Surface is discharged in order to be trapped in the residue of inner cavity of composite metal plate.
The conduit coupling includes evagination sleeve, the first clamping ring, the second clamping ring, the first sealing ring, the second sealing
Circle, band and reinforcing plate.Wherein, in two pipelines of conduit coupling connection, evagination is arranged in the connecting pin of a pipeline
Sleeve is stated for convenience, the pipeline with evagination sleeve in two pipelines to be connected is known as outer tube, another pipeline claims
For inner tube.The outer surface of the evagination sleeve of outer tube is provided with the first clamping ring, and locating slot is arranged in the inner surface of evagination sleeve；Inner tube
Connecting pin outer surface be provided with the second clamping ring.The connecting pin of inner tube is inserted into the evagination sleeve of outer tube, inner tube connecting pin
Gap is formed between end and the locating slot of outer tube for housing the first sealing ring.The end of outer tube connecting pin and inner tube outer surface
It is provided between the second clamping ring and forms gap, for housing the second sealing ring.Band tool there are one base portion and with its phase
The flank that two internal buckles even extend downwardly, the distance between two flanks are slightly less than between the first clamping ring and the second clamping ring
Distance so that two flanks can be respectively engaged on the outside of the first clamping ring and the second clamping ring, and the two is clamped.Outside band
Surface is provided with reinforcing plate, and reinforcing plate can reinforce the intensity of band, and the circumferential junction of reinforcing plate has snap fit fasteners,
Facilitate the installation of band.Due to the present invention composite metal plate hunt leak attachment device pipeline used it is this have it is triple
The conduit coupling of sealing performance, therefore its sealing effect is more preferable.When leak detection test, channel interior air pressure is more than ambient atmosphere
Pressure, band and the first clamping ring, the second clamping ring collective effect, fastening sealing pipeline；When vacuumizing, channel interior air pressure is small
In external atmosphere pressure, the reinforcing plate being arranged on the outside of band at this time plays the deformation that booster action reduces band, effectively carries
High sealing effect.
The operation principle of composite metal plate leak detection attachment device according to the present invention is as follows：The manufacturing process of composite metal plate
In, clad can metallic plate and base metal plate are welded by soldering on periphery first, form a cavity inside three.It is being taken out
Before vacuum operation, need to carry out leak detection test to the composite metal plate of preparation, to ensure composite metal plate made from final production
Quality.When composite metal plate carries out leak detection test, the argon gas pipeline in attachment device that the composite metal plate is hunted leak is connected,
It is passed through argon gas, the seal of composite metal plate cavity and entire pipeline is tested, such as discovery leak source, timely repair welding, and
Second test is carried out, until being repeated up to seal qualification.Evacuated chamber closes in the composite metal plate leak detection attachment device
Vacuum flapper valve, connect vacuum extractor, vacuum extractor constantly extracts the gas of composite metal plate inner cavity out, until air pressure
Until meeting design requirement.
Composite metal plate leak detection attachment device, easy for installation, leakproofness is strong and can will weld the residue discharge generated.This
Outside, with vacuum extractor setting in not homonymy, the data of feedback are more accurate for pressure vacuum meter setting.
Description of the drawings
Fig. 1 is the schematic diagram being connect with composite metal plate according to the composite metal plate leak detection attachment device of the present invention.
Fig. 2, Fig. 3 are the structural schematic diagram according to the composite metal plate leak detection attachment device of the present invention.Wherein, shown in Fig. 2
To be formed with the component of argon gas pipeline incoming end and vacuum extractor incoming end；Fig. 3 is shown and pressure vacuum meter connecting pin
Component composition.
Fig. 4 is the schematic diagram of contraction section in composite metal plate leak detection attachment device.
Fig. 5 is A connection details in Fig. 2, show the detail drawing of conduit coupling.
In figure：
1 --- clad can metallic plate；
2 --- base metal plate；
3 --- soldering；
4 --- composite metal plate leak detection attachment device；
5 --- cavity；
6 --- three-way pipe；
7 --- three-way pipe first interface；
8 --- three-way pipe second interface；
9 --- three-way pipe third interface；
10 --- contraction section；
11 --- vacuum flapper valve；
12 --- vacuum flapper valve first interface；
13 --- vacuum flapper valve second interface；
14 --- argon gas pipeline incoming end；
15 --- vacuum extractor incoming end；
16 --- the first incoming end of composite metal plate；
17 --- the second incoming end of composite metal plate；
18 --- pressure vacuum meter incoming end；
19 --- conduit coupling；
20 --- evagination sleeve；
21 --- the first clamping ring；
22 --- the second clamping ring；
23 --- the first sealing ring；
24 --- the second sealing ring；
25 --- band；
26 --- reinforcing plate；
27 --- locating slot.
Specific implementation mode
The present invention is specifically described below in conjunction with the accompanying drawings.As shown in Figure 1, in the manufacturing process of composite metal plate, it is first
First clad can metallic plate 1 and base metal plate 2 are welded by soldering 3 on periphery, form a cavity 5 inside three.It is being taken out
Before vacuum operation, need to carry out leak detection test to the composite metal plate of preparation, to ensure composite metal plate made from final production
Quality.Composite metal plate leak detection attachment device 4 can be used for composite metal plate leak detection and vacuumize.
Referring to Fig. 2, Fig. 3, a kind of composite metal plate leak detection attachment device includes three-way pipe 6, vacuum flapper valve 11, connecting tube
Road, contraction section 10 and conduit coupling 19.Three-way pipe 6 has three-way pipe first interface 7, three-way pipe second interface 8 and three
Siphunculus third interface 9.Vacuum flapper valve 11 has vacuum flapper valve first interface 12 and vacuum flapper valve second interface 13.Metal
It is provided with the first incoming end of composite metal plate 16 in one end soldering 3 of composite plate；It is arranged in the other end soldering 3 of composite metal plate
There is the second incoming end of composite metal plate 17.Three-way pipe first interface 7 is connected by connecting line with vacuum extractor incoming end 15,
And pass through 19 pinch seal of conduit coupling；Three-way pipe second interface 8 is connected with vacuum flapper valve first interface 12, and passes through pipe
19 pinch seal of pipe connecting；Three-way pipe third interface 9 passes through connecting line and composite metal plate first with contraction section 10
Incoming end 16 is connected, and passes through 19 pinch seal of conduit coupling.The second incoming end of composite metal plate 17 by connecting line with
Pressure vacuum meter incoming end 18 is connected, and passes through 19 pinch seal of conduit coupling.
As shown in figure 4, contraction section 10 is arranged in the outside of the first incoming end of composite metal plate 16, the caliber D1 of diastole section is
1.5 times of the caliber D2 of contraction section ~ 3.5 times；The length H2 of transition is 1 times ~ 2.5 times of the caliber D1 of diastole section；Contraction section
Length H1 be 1.5 ~ 3 times of caliber D1 of diastole section.Due to being provided with contraction section on the pipeline being connect with composite metal plate,
When carrying out leak detection test to composite metal plate using argon gas, the air pressure of argon gas is more than the air pressure of composite metal plate inside cavity,
The presence of contraction section makes flow velocity of the argon gas at this be promoted rapidly, is quickly full of the inner cavity of composite metal plate.When vacuumizing,
The air pressure of composite metal plate inside cavity is more than external pressure, and gas is flowed out from composite metal plate inside cavity, due to contraction section
Presence, the flow velocity of gas this it is rapid promoted and form a vacuum area in subsequent widened pipeline, can will weld
When be trapped in composite metal plate the residue of inner cavity be sucked out together, promote the quality of composite metal plate.
As shown in figure 5, conduit coupling 19 includes that the clamping clamping ring 22, first of ring 21, second of evagination sleeve 20, first is close
Seal 23, the second sealing ring 24, band 25 and reinforcing plate 26.Wherein, in two pipelines that conduit coupling 19 connects, one
The connecting pin setting evagination sleeve 20 of root pipeline, states, will have evagination sleeve 20 in two pipelines to be connected for convenience
Pipeline be known as outer tube, another pipeline is known as inner tube.The outer surface of the evagination sleeve 20 of outer tube is provided with the first clamping ring 21,
Locating slot 27 is arranged in the inner surface of evagination sleeve 20；The connecting pin outer surface of inner tube is provided with the second clamping ring 22.The company of inner tube
It connects end to be inserted into the evagination sleeve of outer tube, forms gap between the end of inner tube connecting pin and the locating slot 27 of outer tube for housing
First sealing ring 23.The end of outer tube connecting pin and inner tube outer surface form gap between being provided with the second clamping ring 22, are used for
Accommodating second sealing ring 24.The tool of band 25 is there are one the flank that base portion and coupled two internal buckles extend downwardly, and two
The distance between flank is slightly less than the distance between the first clamping ring 21 and second clamping ring 22, so that two flanks can be clamped respectively
It is clamped 22 outside of ring in the first clamping ring 21 and second, and the two is clamped.The outer surface of band 25 is provided with reinforcing plate 26,
Reinforcing plate 26 can reinforce the intensity of band 25, and the circumferential junction of reinforcing plate 26 has snap fit fasteners, facilitates band
25 installation.Due to the present invention composite metal plate hunt leak attachment device pipeline used it is this have triple seal performance
Conduit coupling 19, therefore its sealing effect is more preferable.When leak detection test, channel interior air pressure is more than external atmosphere pressure, sealing
Band 25 and first is clamped ring 21, second and is clamped 22 collective effect of ring, fastening sealing pipeline；When vacuumizing, channel interior air pressure is small
In external atmosphere pressure, the reinforcing plate that 25 outside of band is arranged at this time plays the deformation that booster action reduces band 25, effectively
Ground improves sealing effect.
Composite metal plate leak detection attachment device, easy for installation, leakproofness is strong and can will weld the residue discharge generated.This
Outside, with vacuum extractor setting in not homonymy, the data of feedback are more accurate for pressure vacuum meter setting.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., be all included in the scope of protection of the present invention.
Claims (3)
- The attachment device 1. a kind of composite metal plate is hunted leak, including three-way pipe (6), vacuum flapper valve (11), connecting line, contraction section (10) and conduit coupling (19)；The three-way pipe (6) have three-way pipe first interface (7), three-way pipe second interface (8) with And three-way pipe third interface (9)；The vacuum flapper valve (11) has vacuum flapper valve first interface (12) and vacuum flapper valve Second interface (13), it is characterised in that：It is provided with the first incoming end of composite metal plate (16) in one end soldering (3) of composite metal plate；Composite metal plate it is another It is provided with the second incoming end of composite metal plate (17) in end soldering (3)；The three-way pipe first interface (7) is connected by connecting line with vacuum extractor incoming end (15), and passes through the pipe Pipe connecting (19) pinch seal；The three-way pipe second interface (8) is connected with the vacuum flapper valve first interface (12), and Pass through the conduit coupling (19) pinch seal；The three-way pipe third interface (9) passes through with the contraction section (10) Connecting line is connected with the first incoming end of the composite metal plate (16), and passes through the conduit coupling (19) pinch seal； The second incoming end of the composite metal plate (17) is connected by connecting line with pressure vacuum meter incoming end (18), and by described Conduit coupling (19) pinch seal；Contraction section (10) setting is to receive in the outside of the first incoming end of the composite metal plate (16), the caliber D1 of diastole section 1.5 times of the caliber D2 of contracting section~3.5 times；The length H2 of transition is 1 times~2.5 times of the caliber D1 of diastole section；Contraction section Length H1 be 1.5~3 times of caliber D1 of diastole section.
- The attachment device 2. composite metal plate according to claim 1 is hunted leak, it is characterised in that：The conduit coupling (19) includes evagination sleeve (20), the first clamping ring (21), the second clamping ring (22), the first sealing Enclose (23), the second sealing ring (24), band (25) and reinforcing plate (26)；Two pipelines of conduit coupling (19) connection In, the connecting pin setting evagination sleeve (20) of a pipeline, the pipeline with evagination sleeve (20) is known as outer tube, another pipeline Referred to as inner tube；The outer surface of the evagination sleeve (20) of outer tube is provided with the first clamping ring (21), the inner surface of evagination sleeve (20) Locating slot (27) is set；The connecting pin outer surface of inner tube is provided with the second clamping ring (22)；Outer tube is inserted into the connecting pin of inner tube Gap is formed in evagination sleeve, between the end of inner tube connecting pin and the locating slot (27) of outer tube for housing the first sealing ring (23)；The end of outer tube connecting pin and inner tube outer surface form gap between being provided with the second clamping ring (22), for housing Two sealing rings (24)；There are one the flank that base portion and coupled two internal buckles extend downwardly, both sides of the chest for band (25) tool The distance between portion is slightly less than the distance between the first clamping ring (21) and the second clamping ring (22), so that two flanks can block respectively It is connected on the first clamping ring (21) and the second clamping ring (22) outside, and the two is clamped.
- The attachment device 3. composite metal plate according to claim 2 is hunted leak, it is characterised in that：The outer surface of the band (25) is provided with reinforcing plate (26), and there is clamping to connect for the circumferential junction of reinforcing plate (26) Fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610527458.1A CN106197861B (en) | 2016-07-05 | 2016-07-05 | A kind of composite metal plate leak detection attachment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610527458.1A CN106197861B (en) | 2016-07-05 | 2016-07-05 | A kind of composite metal plate leak detection attachment device |
Publications (2)
| Publication Number | Publication Date |
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| CN106197861A CN106197861A (en) | 2016-12-07 |
| CN106197861B true CN106197861B (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610527458.1A Active CN106197861B (en) | 2016-07-05 | 2016-07-05 | A kind of composite metal plate leak detection attachment device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114858356A (en) * | 2022-07-07 | 2022-08-05 | 江苏巨鼎环保节能设备制造有限公司 | Titanium steel composite sheet leak hunting device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201006861Y (en) * | 2006-11-20 | 2008-01-16 | 河南省中原大化集团有限责任公司 | Composite board equipment pressured stopping leak anti-corrosive tools |
| CN101468276A (en) * | 2007-12-28 | 2009-07-01 | 海斯博特（北京）科技有限公司 | Venturi cyclone dust extractor |
| CN201289423Y (en) * | 2008-11-19 | 2009-08-12 | 南京宝色股份公司 | Leak detection structure for composite board equipment |
| CN101929547A (en) * | 2010-08-04 | 2010-12-29 | 南京宝色股份公司 | Double-integrated sealing structure for pressure container of composite board |
| CN202735035U (en) * | 2012-08-08 | 2013-02-13 | 山东鲍德金属复合板有限公司 | Metal compound blank quick leakage test device |
| CN103433650B (en) * | 2013-07-18 | 2016-02-24 | 浙江中隧桥波形钢腹板有限公司 | Absorption type vacuum welding equipment and technique |
| CN203422195U (en) * | 2013-08-24 | 2014-02-05 | 西安优耐特容器制造有限公司 | Online leak detection system for composite board device |
| KR101733626B1 (en) * | 2014-01-15 | 2017-05-24 | 두산중공업 주식회사 | Hydrostatic Test Device and Hydrostatic Test Method of High Pressure Turbine |
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Inventor after: Liu Chun Inventor after: Tian Baosheng Inventor after: Cheng Xiaoying Inventor after: Wei An Inventor before: Liu Chun Inventor before: Tian Baosheng Inventor before: Liu Fuyi Inventor before: Cheng Xiaoying Inventor before: Jin Jianbing Inventor before: Wan Liang |
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Effective date of registration: 20171103 Address after: 271100 Shandong province Laiwu steel city Gangcheng Street No. 10 Applicant after: Shandong Jinan Baode metal composite plate Technology Co. Ltd. Address before: 250101 Ji'nan Industrial Road, Shandong, No. 21 Applicant before: SHANDONG BAODE CLAD CO., LTD. |
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