CN108106413A - A kind of vertical high-temperature sintering furnace - Google Patents
A kind of vertical high-temperature sintering furnace Download PDFInfo
- Publication number
- CN108106413A CN108106413A CN201810054025.8A CN201810054025A CN108106413A CN 108106413 A CN108106413 A CN 108106413A CN 201810054025 A CN201810054025 A CN 201810054025A CN 108106413 A CN108106413 A CN 108106413A
- Authority
- CN
- China
- Prior art keywords
- flue
- graphite
- furnace body
- hard
- graphite felt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/08—Arrangements of linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
Abstract
The invention discloses a kind of vertical high-temperature sintering furnace, including furnace body, vacuum system, switch board, lifting platform, heating chamber, flue, hard graphite felt, bridge plate;The lower portion of furnace body is equipped with lifting platform, left side is equipped with vacuum system and switch board equipped with staircase and power distribution cabinet, right side;It is equipped in the furnace body and is intersected barrel type flue that is stacked and passing through prismatics that fixing bolt is fixedly connected, more by multilayer hard graphite felt;It is equipped in the flue by hard graphite slab angularly and passes through the hexagon added hot cell that graphite bolt is mutually assembled into;The present invention is intersected using multilayer hard graphite felt is assembled into flue, heating chamber is assembled by the combination of hard graphite simultaneously, local flue or heating chamber parts damages, can reparation quickly be safeguarded using part replacement mode, scrap processing without whole, assembly and disassembly is quick, save material cost, the plant maintenance time is reduced, effectively extends sintering furnace service life, improves production efficiency.
Description
Technical field
The present invention relates to high temperature sintering furnace technical equipment field, more particularly to a kind of vertical high-temperature sintering furnace.
Background technology
Vacuum sintering furnace is a kind of advanced Equipment for Heating Processing, can carry out the heating in vacuum of metal material and workpiece, quench
Various heat treatments, the vacuum heat treatment process such as fire, tempering, annealing, carburizing, nitriding, pressurization air quenching can make processed material and work
Part performance significantly improves, and material is fully used.The basic parameter of traditional vacuum stove includes working vacuum degree, end vacuum
Degree, speed of exhaust ratio, furnace chamber leak rate, heating power, temperature uniformity, wherein temperature uniformity are whether vacuum drying oven is qualified
One important indicator, it is ensured that Fine Texture of Material differences in expansion and cause part deformation.
In the prior art, the heating chamber of vacuum sintering furnace is usually that integral type manufactures structure, integral structure with flue
Heating chamber, flue the defects of be:Once the 1, generation local damage may result in whole heating chamber or flue is scrapped, entirety is more
It changes of high cost;2nd, integral replacing causes the waste of material, and influences production efficiency;3rd, sintering furnace maintenance man-hours, cost and expense
Increase.Seriously affect the service life of integral sintered stove.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of vertical high-temperature sintering furnace, for it is of the prior art not
Foot, is intersected using multilayer hard graphite felt and is assembled into flue, while is assembled into heating chamber by the combination of hard graphite,
Local flue or heating chamber parts damages, quickly can be safeguarded reparation, without whole report using part replacement mode
Useless processing so as to save material cost, reduces the plant maintenance time, effectively extends the service life of integral sintered stove, improves life
Production sintering efficiency.
In order to achieve the above objectives, technical scheme is as follows:A kind of vertical high-temperature sintering furnace, including furnace body, vacuum
System, switch board, lifting platform, staircase, power distribution cabinet, heating chamber, flue, supporting block, courage frame, column, fixing bolt, electrode hole,
Spacer, thermometer hole, hard graphite felt, graphite electrode, graphite bolt, connecting plate, heating plate, bridge plate, otic placode, it is characterised in that:
The furnace body is fixedly installed on grate top, and the grate lower part is provided with lifting platform, is assembled on the left of the furnace body
There are staircase and power distribution cabinet, vacuum system is equipped on the right side of the furnace body, switch board is provided in front of the vacuum system;The stove
Body lower cover is fed or is discharged by the folding of lifting of lifting table formula;It is provided in the furnace body and is mutually handed over by multilayer hard graphite felt
Barrel type flue that is that fork is stacked and passing through prismatics that fixing bolt is fixedly connected, more, the flue carry head cover and pedestal;Institute
It states and the hexagon added hot cell that graphite bolt is mutually assembled into is provided with by hard graphite slab angularly and passed through in flue;
The stainless steel courage frame of drum-shaped is provided with outside the flue, section is provided in the courage frame as the more of hexagon
Layer hard graphite felt, along hexagon laterally mutually angle crossing stack configuration, and pass through what fixing bolt was formed by fixedly connecting
Flue;
For the heating chamber by the heating plate of six pieces of rectangles according to hexagon-shaped configuration, the heating plate top passes through graphite bolt
Connecting plate is fixedly installed, is fixedly connected on the connecting plate by electrode hole with graphite electrode;The bottom two of the heating plate
Side integral type is provided with two pieces of otic placodes, and the otic placode between adjacent two pieces of heating plates passes through stone by bending for the bridge plate at 120 degree of angles
Black bolt is mutually permanently connected.
The courage top of the trellis circumferencial direction is angularly provided with multiple supporting blocks, and the courage frame periphery is axially provided with
Multiple columns being made of channel steel;The supporting block is fixedly connected with furnace body, and flue top circumferencial direction is angularly set
There are six spacer, electrode hole is provided in the spacer, graphite electrode is equipped in the electrode hole;It is set in the middle part of the flue
There is thermometer hole.
The hard graphite felt hexagon of the flue and the mutual para position allocation of hard graphite hexagon of heating chamber.
The head cover connects fixation with multilayer hard graphite felt by stainless steel substrate by fixing bolt, and the pedestal is not by
Rust steel substrate connects fixation with multilayer hard graphite felt by fixing bolt.
2000 DEG C of hard graphite felt heatproof of the flue or more, the number of plies scope of the hard graphite felt assembling is two layers
To eight layers;The thickness scope of the hard graphite felt is 30mm -50mm.
Through the above technical solutions, the advantageous effect of technical solution of the present invention is:It is mutually handed over using multilayer hard graphite felt
Fork is assembled into flue, while is assembled into heating chamber, local flue or heating chamber component damage by the combination of hard graphite
It is bad, can reparation quickly be safeguarded using part replacement mode, scrap processing without whole, Standard is simple, and assembling is torn open
It unloads quickly, can be widely applied to various high-temperature vacuum sintering furnaces, so as to save material cost, reduce the plant maintenance time, effectively
Extend the service life of integral sintered stove, improve production sintering efficiency.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the present invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of vertical high-temperature sintering furnace front view schematic diagram disclosed in the embodiment of the present invention;
Fig. 2 is a kind of vertical high-temperature sintering furnace sectional view schematic diagram disclosed in the embodiment of the present invention;
Fig. 3 is a kind of vertical high-temperature sintering furnace Fig. 2 top view illustrations disclosed in the embodiment of the present invention;
Fig. 4 is a kind of vertical high-temperature sintering furnace body top view illustration disclosed in the embodiment of the present invention;
Fig. 5 is a kind of vertical high-temperature sintering furnace Fig. 5 A-A disclosed in the embodiment of the present invention to sectional view schematic diagram;
Fig. 6 is a kind of vertical high-temperature sintering furnace flue top view illustration disclosed in the embodiment of the present invention;
Fig. 7 is a kind of vertical high-temperature sintering furnace Fig. 6 B-B direction sectional view schematic diagrames disclosed in the embodiment of the present invention;
Fig. 8 is a kind of vertical high-temperature sintering furnace Fig. 7 C-C disclosed in the embodiment of the present invention to sectional view schematic diagram;
Fig. 9 is a kind of vertical high-temperature sintering furnace Fig. 7 D-D disclosed in the embodiment of the present invention to sectional view schematic diagram.
Corresponding component title of the number represented by with letter in figure:
1. 2. vacuum system of furnace body, 3. switch board, 4. lifting platform
5. 6. power distribution cabinet of staircase, 7. heating chamber, 8. flue
9. 10. courage frame of supporting block, 11. column, 12. fixing bolt
13. 14. spacer of electrode hole, 15. thermometer hole, 16. hard graphite felt
17. 18. graphite bolt of graphite electrode, 19. connecting plate, 20. heating plate
21. 22. otic placode of bridge plate
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment belongs to the scope of protection of the invention.
According to Fig. 1 to 9, the present invention provides a kind of vertical high-temperature sintering furnace, including furnace body 1, vacuum system 2, switch board
3rd, lifting platform 4, staircase 5, power distribution cabinet 6, heating chamber 7, flue 8, supporting block 9, courage frame 10, column 11, fixing bolt 12, electrode hole
13rd, spacer 14, thermometer hole 15, hard graphite felt 16, graphite electrode 17, graphite bolt 18, connecting plate 19, heating plate 20, bridge plate
21st, otic placode 22.
The furnace body 1 is fixedly installed on grate top, and the grate lower part is provided with lifting platform 4, the 1 left side dress of furnace body
Equipped with staircase 5 and power distribution cabinet 6,1 right side of furnace body is equipped with vacuum system 2, and 2 front of vacuum system is provided with switch board
3;1 lower cover of furnace body is fed or is discharged by 4 lift folding of lifting platform;It is provided in the furnace body 1 by multilayer hard
Graphite felt 16 intersects barrel type flue 8 that is stacked and passing through the prismatic be fixedly connected, more of fixing bolt 12, the flue 8
With circular head cover and pedestal;It is provided in the flue 8 by hard graphite slab angularly and passes through 18 phase of graphite bolt
The hexagon added hot cell 7 being mutually assembled into;
The stainless steel courage frame 10 of drum-shaped is provided with outside the flue 8, section is provided in the courage frame 10 as six sides
The multilayer hard graphite felt 16 of shape, along hexagon laterally mutually angle crossing stack configuration, and pass through fixing bolt 12 and fix
Be formed by connecting flue 8;
For the heating chamber 7 by the heating plate 20 of six pieces of rectangles according to hexagon-shaped configuration, 20 top of heating plate passes through stone
Black bolt 18 is fixedly installed connecting plate 19, is fixedly connected on the connecting plate 19 by electrode hole 13 with graphite electrode 17;Institute
The two bottom sides integral type for stating heating plate 20 is provided with two pieces of otic placodes 22, and the otic placode 22 between adjacent two pieces of heating plates 20 passes through folding
Curved is that the bridge plate 21 at 120 degree of angles is mutually permanently connected by graphite bolt 18.
The 10 top circumference direction of courage frame is angularly provided with multiple supporting blocks 9, and 10 periphery of courage frame is axial
It is provided with multiple columns 11 being made of channel steel;The supporting block 9 is fixedly connected with furnace body 1, the 8 top circumferencial direction of flue
It angularly sets there are six spacer 14, electrode hole 13 is provided in the spacer 14, graphite electricity is equipped in the electrode hole 13
Pole 17;8 middle part of flue is provided with thermometer hole 15.
The hard graphite felt hexagon of the flue 8 and the mutual para position allocation of hard graphite hexagon of heating chamber 7.
The head cover connects fixation, the pedestal by stainless steel substrate and multilayer hard graphite felt 16 by fixing bolt 12
Fixation is connected by fixing bolt 12 by stainless steel substrate and multilayer hard graphite felt 16.
2000 DEG C of 16 heatproof of hard graphite felt of the flue 8 or more, the number of plies that the hard graphite felt 16 assembles are four
Layer;The thickness of the hard graphite felt 16 is 40mm.
By above-mentioned specific embodiment, the beneficial effects of the invention are as follows:It is intersected assembling using multilayer hard graphite felt
As flue, while heating chamber, local flue or heating chamber parts damages are assembled by the combination of hard graphite,
Reparation quickly to be safeguarded using part replacement mode, scraps processing without whole, Standard is simple, and assembly and disassembly is quick,
Various high-temperature vacuum sintering furnaces are can be widely applied to, so as to save material cost, reduce the plant maintenance time, are effectively extended whole
The service life of sintering furnace improves production sintering efficiency.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (5)
1. a kind of vertical high-temperature sintering furnace, which is characterized in that including furnace body, vacuum system, switch board, lifting platform, staircase, distribution
Cabinet, heating chamber, flue, supporting block, courage frame, column, fixing bolt, electrode hole, spacer, thermometer hole, hard graphite felt, graphite electricity
Pole, graphite bolt, connecting plate, heating plate, bridge plate, otic placode;The furnace body is fixedly installed on grate top, and the grate lower part is set
Lifting platform is equipped with, staircase and power distribution cabinet are equipped on the left of the furnace body, vacuum system, the vacuum are equipped on the right side of the furnace body
Switch board is provided in front of system;The furnace body lower cover is fed or is discharged by the folding of lifting of lifting table formula;In the furnace body
It is provided with and is intersected ladle furnace that is stacked and passing through prismatics that fixing bolt is fixedly connected, more by multilayer hard graphite felt
Courage, the flue carry head cover and pedestal;It is provided in the flue by hard graphite slab angularly and passes through graphite bolt
The hexagon added hot cell being mutually assembled into;
The stainless steel courage frame of drum-shaped is provided with outside the flue, it is hard that the multilayer that section is hexagon is provided in the courage frame
Matter graphite felt, along hexagon laterally mutually angle crossing stack configuration, and pass through the flue that fixing bolt is formed by fixedly connecting;
The heating chamber by the heating plate of six pieces of rectangles according to hexagon-shaped configuration, by graphite bolt fixed by the heating plate top
Connecting plate is provided with, is fixedly connected on the connecting plate by electrode hole with graphite electrode;The two bottom sides one of the heating plate
Body formula is provided with two pieces of otic placodes, and the otic placode between adjacent two pieces of heating plates passes through graphite spiral shell by bending for the bridge plate at 120 degree of angles
Bolt is mutually permanently connected.
A kind of 2. vertical high-temperature sintering furnace according to claim 1, which is characterized in that described courage top of the trellis circumferencial direction etc.
Angle is provided with multiple supporting blocks, and the courage frame periphery is axially provided with multiple columns being made of channel steel;The support
Block is fixedly connected with furnace body, and flue top circumferencial direction is angularly set there are six spacer, and electricity is provided in the spacer
Pole hole is equipped with graphite electrode in the electrode hole;Thermometer hole is provided in the middle part of the flue.
A kind of 3. vertical high-temperature sintering furnace according to claim 1, which is characterized in that the hard graphite felt six of the flue
The mutual para position allocation of hard graphite hexagon of side shape and heating chamber.
4. a kind of vertical high-temperature sintering furnace according to claim 1, which is characterized in that the head cover by stainless steel substrate and
Multilayer hard graphite felt is connected by fixing bolt and fixed, and the pedestal is passed through solid by stainless steel substrate and multilayer hard graphite felt
Surely it is bolted fixation.
5. a kind of vertical high-temperature sintering furnace according to claim 1, which is characterized in that the hard graphite felt of the flue is resistance to
2000 DEG C or more of temperature, the number of plies scope of the hard graphite felt assembling is two layers to eight layers;The thickness gauge of the hard graphite felt
Very little scope is 30mm -50mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810054025.8A CN108106413A (en) | 2018-01-19 | 2018-01-19 | A kind of vertical high-temperature sintering furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810054025.8A CN108106413A (en) | 2018-01-19 | 2018-01-19 | A kind of vertical high-temperature sintering furnace |
Publications (1)
Publication Number | Publication Date |
---|---|
CN108106413A true CN108106413A (en) | 2018-06-01 |
Family
ID=62220112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810054025.8A Pending CN108106413A (en) | 2018-01-19 | 2018-01-19 | A kind of vertical high-temperature sintering furnace |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN108106413A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112460996A (en) * | 2020-11-26 | 2021-03-09 | 深圳市国创新材料科技有限公司 | Ultrafast heating sintering device and application thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3088419B1 (en) * | 1999-06-23 | 2000-09-18 | 助川電気工業株式会社 | Cylindrical heater for vertical heating furnace |
CN201081533Y (en) * | 2007-09-13 | 2008-07-02 | 济南伟得热工材料有限公司 | Vertical ultra-high temperature vacuum graphite oven |
JP2009299901A (en) * | 2009-09-04 | 2009-12-24 | Kwansei Gakuin | Screw |
JP2012028446A (en) * | 2010-07-21 | 2012-02-09 | Kwansei Gakuin | HEAT TREATMENT APPARATUS FOR SiC SEMICONDUCTOR WAFER |
CN203034053U (en) * | 2012-12-20 | 2013-07-03 | 新宇航空制造(苏州)有限公司 | Heating chamber of vacuum heat treatment furnace |
CN206373359U (en) * | 2016-12-28 | 2017-08-04 | 北京有色金属研究总院 | Vacuum degassing furnace |
CN207894226U (en) * | 2018-01-19 | 2018-09-21 | 苏州楚翰真空科技有限公司 | A kind of vertical high-temperature sintering furnace |
-
2018
- 2018-01-19 CN CN201810054025.8A patent/CN108106413A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3088419B1 (en) * | 1999-06-23 | 2000-09-18 | 助川電気工業株式会社 | Cylindrical heater for vertical heating furnace |
CN201081533Y (en) * | 2007-09-13 | 2008-07-02 | 济南伟得热工材料有限公司 | Vertical ultra-high temperature vacuum graphite oven |
JP2009299901A (en) * | 2009-09-04 | 2009-12-24 | Kwansei Gakuin | Screw |
JP2012028446A (en) * | 2010-07-21 | 2012-02-09 | Kwansei Gakuin | HEAT TREATMENT APPARATUS FOR SiC SEMICONDUCTOR WAFER |
CN203034053U (en) * | 2012-12-20 | 2013-07-03 | 新宇航空制造(苏州)有限公司 | Heating chamber of vacuum heat treatment furnace |
CN206373359U (en) * | 2016-12-28 | 2017-08-04 | 北京有色金属研究总院 | Vacuum degassing furnace |
CN207894226U (en) * | 2018-01-19 | 2018-09-21 | 苏州楚翰真空科技有限公司 | A kind of vertical high-temperature sintering furnace |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112460996A (en) * | 2020-11-26 | 2021-03-09 | 深圳市国创新材料科技有限公司 | Ultrafast heating sintering device and application thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN207894226U (en) | A kind of vertical high-temperature sintering furnace | |
CN101403032A (en) | Thermal treatment process for quick cutting steel composite roll | |
CN105420486B (en) | A kind of heater for rolling steel method for heating and controlling suitable for pipe line steel | |
CN108106413A (en) | A kind of vertical high-temperature sintering furnace | |
CN103361570A (en) | Martensite stainless steel annular forging and heat treatment technology thereof | |
CN103334064B (en) | Low yield ratio chromium-molybdenum steel plate and production method thereof | |
CN203923309U (en) | For the Quartz Ceramic Roller of electrical steel continuous annealing stove heat section | |
CN201071380Y (en) | Vertical segmenting thermal treatment industry furnace | |
CN202547393U (en) | Heat-resistant metal collar for CSP (compact strip production) heating furnace roller | |
CN1330779C (en) | Heat treating trimming method for large-scale bearing ring | |
CN101429584B (en) | Mobile riding wheel frame | |
CN104514106B (en) | A kind of energy-saving baking cloth stove | |
CN106381364A (en) | Method for improving grain size of blade steel 2Cr12MoV | |
CN2652942Y (en) | Non-muffle stainless steel strip bright annealing furnace | |
CN2553318Y (en) | Resistance plate-type radiant-tube electric heater | |
CN201436304U (en) | A Heat Treatment Furnace | |
CN100396803C (en) | Air guide wall arch or mansard arch masonry and brick masonry large beam and pelletizing vertical furnace air guide wall | |
CN220083700U (en) | Combined water-cooling bottom ring for submerged arc furnace | |
CN2516926Y (en) | Muffle furnace | |
CN214212515U (en) | Continuous atmosphere protection brazing furnace hearth | |
CN216107120U (en) | Heat treatment device capable of improving comprehensive performance of yawing gear ring | |
CN210736221U (en) | Quick removable formula row material cooling system | |
CN220379817U (en) | Assembled card formula stove deep bead | |
CN102399964B (en) | Steel pipe normalizing furnace | |
CN202297688U (en) | Heat treatment furnace with mobile furnace cover |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
CB02 | Change of applicant information | ||
CB02 | Change of applicant information |
Address after: 215000 Sheet Mill No. 19 Xingtai Road, Taiping Street, Xiangcheng District, Suzhou City, Jiangsu Province (formerly Duer) Applicant after: Suzhou Vacuum Technology Co., Ltd. Chu Han Address before: 215000 No. 168 Qihe Road, Qihe Village, Weitang Town, Xiangcheng District, Suzhou City, Jiangsu Province Applicant before: Suzhou Vacuum Technology Co., Ltd. Chu Han |