CN106322921A - Vacuum drying device - Google Patents
Vacuum drying device Download PDFInfo
- Publication number
- CN106322921A CN106322921A CN201611032798.3A CN201611032798A CN106322921A CN 106322921 A CN106322921 A CN 106322921A CN 201611032798 A CN201611032798 A CN 201611032798A CN 106322921 A CN106322921 A CN 106322921A
- Authority
- CN
- China
- Prior art keywords
- tank body
- tank
- vacuum dryer
- coal sample
- cover
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
- F26B11/14—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a vacuum drying device which comprises a frame, a tank, a heating device, a vacuum pumping device and an agitation device. The tank is hinged on the frame through two horizontal hinge shafts, an opening is formed in the top of the tank, a tank cover is arranged at the opening and hermetically connected with the tank, the heating device is used for heating coal samples in the tank, the vacuum pumping device is used for extracting air and steam in the tank, and the agitation device is positioned at the bottom of the tank and used for agitating the coal samples in the tank. The coal samples can be more uniformly heated through the agitation device positioned at the bottom of the tank, so that rapid and uniform drying is achieved. After drying is finished, the vacuum pumping device stops operation, so that intensities of pressure of the inside and the outside of the tank are mutually balanced, the tank cover is opened, the tank is overturned, so that the opening faces down, and dried coal samples can be discharged.
Description
Technical field
The present invention relates to coal analysis field, particularly relate to a kind of vacuum dryer.
Background technology
In coal property test industry, on the premise of sample making course is wanted the representativeness of strict guarantee sample, sample is carried out
Crush and division, until meeting the laboratory assay requirement to sample granularity Yu quality, owing to crushing with division equipment sample
The adaptability of humidity has certain requirement, to be therefore dried coal sample before.
In order to prevent in coal sample each component beyond moisture removal to change, need to control temperature when being dried 50
Below degree Celsius, also need to prevent, in dry link, coal sample loss or the situation of batch mixing occur simultaneously, affect representation of coal sampling, institute
So that coal sample to be mainly dried by prior art in the following ways:
1, air dries mode naturally: efficiency is low, time length, occupied ground big, cannot realize automatization.
2, hot air convective drying mode: the mode such as warm-air drier or baking oven of employing forms thermal current and does the coal sample of tiling
Dry, because dry air can not fully contact with coal sample, and the evaporation of moisture can only be relied on, drying efficiency is low, and the time is long.
3, the saturating formula of wind is dried: utilizes hot blast to penetrate laid coal sample on screen cloth, makes hot blast be fully contacted with coal sample, increases
Evaporation efficiency, but this still can only rely on the evaporation of the following moisture of boiling point, and drying efficiency is the highest, and easily on screen cloth
Putty.
The most how on the premise of ensureing coal sample quality, improve the drying efficiency of coal sample, be that those skilled in the art are anxious
Need to solve the technical problem that.
Summary of the invention
It is an object of the invention to provide a kind of vacuum dryer, coal can be improved on the premise of ensureing coal sample quality
The drying efficiency of sample.
For solving above-mentioned technical problem, the technical scheme is that
A kind of vacuum dryer, including: frame, tank body, heater and vacuum extractor and agitating device, described
Tank body is hinged in described frame by horizontally disposed two jointed shafts, and described tank body top is provided with uncovered, described open-mouth
Being provided with cover, described cover and described tank body to be tightly connected, described heater is for adding the coal sample in described tank body
Heat, described vacuum extractor is for extracting the air in described tank body and steam, and described agitating device is positioned at the end of described tank body
Portion, for stirring the coal sample in described tank body.
Preferably, described heater includes the first Infrared Heating unit and the second Infrared Heating unit, described first red
External heat unit is arranged on described cover, and for directly heating the coal sample in described tank body, described second infrared adds
Hot cell is positioned on described tank body, for heating the inwall of described tank body.
Preferably, described vacuum extractor includes that exhaust tube, the first end of described exhaust tube stretch in described tank body, institute
The second end stating exhaust tube is positioned at outside described tank body, and described first end is provided with filter cylinder.
Preferably, described exhaust tube extends transversely through a wherein described jointed shaft.
Preferably, the deashing device remaining coal sample in clearing up described tank body is also included.
Preferably, described deashing device includes the first deashing pipe being positioned on the blade of described agitating device and is positioned at described
The second deashing pipe in exhaust tube.
Preferably, also include controlling the power set that described tank body rotates in described frame.
Preferably, a side of described cover and a side of described tank body are hinged.
Preferably, also include for controlling the hood-opening device that described cover rotates, institute around its hinged place with described tank body
Stating hood-opening device and include expansion link, one end and the described cover of described expansion link are hinged, the other end of described expansion link and described
Tank body is hinged.
Compared with prior art, technique scheme has the advantage that
A kind of vacuum dryer provided by the present invention, including: frame, tank body, heater and vacuum extractor with
And agitating device, tank body is hinged in frame by horizontally disposed two jointed shafts, and tank body top is provided with uncovered, and open-mouth sets
Having cover, cover and tank body to be tightly connected, heater is for heating the coal sample in tank body, and vacuum extractor is used for taking out
Taking the air in tank body and steam, agitating device is positioned at the bottom of tank body, the coal sample in agitator tank body.
When coal sample is dried by needs, first coal sample is put into from the uncovered of tank body, then by cover by uncovered enter
Row seals, and uses heater to heat the coal sample in tank body, when being heated to design temperature, then passes through vacuum extractor
Air in extraction tank body, to reduce the pressure in tank body, and then the boiling point of reduction water, consequently facilitating be dried coal sample.Adopt simultaneously
The steam vaporized with vacuum extractor extraction, and formation negative pressure state around coal sample, between the ectonexine of coal sample and surface
And form bigger moist gradient between medium, accelerate vaporization rate, and then reach quick-drying purpose.Wherein taking out very
While sky, heater is also in heating.It is essential that by the agitating device being positioned at tank base, coal sample can be made to be heated
More uniform, thus reach the purpose that Quick uniform is dried.After being dried, vacuum extractor quits work, and makes tank body
Inside and outside pressure mutually balances, and then opens cover, upset tank body make uncovered down, dried coal sample can be drawn off.
Accompanying drawing explanation
In order to be illustrated more clearly that the present invention or technical scheme of the prior art, below will be to embodiment or prior art
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is some of the present invention
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
The master of a kind of vacuum dryer that Fig. 1 is provided by a kind of detailed description of the invention of the present invention regards cross-section structure and illustrates
Figure；
The left view structural representation of a kind of vacuum dryer that Fig. 2 is provided by a kind of detailed description of the invention of the present invention.
Reference is as follows:
1 is frame, and 2 is the second Infrared Heating unit, and 3 is tank body, and 4 is the first Infrared Heating unit, and 5 is cover, and 6 is filter
Cylinder, 7 is exhaust tube, and 8 is the second deashing pipe, and 9 is motor, and 10 is agitating device, and 11 is expansion link.
Detailed description of the invention
The most as described in the background section, the equipment being dried coal sample at present, drying effect is poor.
On the basis of the studies above, embodiments provide a kind of vacuum dryer, apply the present embodiment
During the vacuum dryer provided, coal sample being put into from the uncovered of tank body, then sealed uncovered by cover, employing adds
Coal sample in tank body is heated by thermal, is heated to design temperature, then passes through the sky in vacuum extractor extraction tank body
Gas, to reduce the pressure in tank body, and then the boiling point of reduction water, consequently facilitating be dried coal sample.Use vacuum extractor to take out simultaneously
Take the steam of vaporization, and formation negative pressure state around coal sample, formed between the ectonexine of coal sample and between surface and medium
Bigger moist gradient, accelerates vaporization rate, and then reaches quick-drying purpose.It is essential that by being positioned at the bottom of tank body
The agitating device in portion, can make coal sample be uniformly heated, thus reach the purpose that Quick uniform is dried.When being dried it
After, vacuum extractor quits work, and makes the pressure inside and outside tank body mutually balance, and then opens cover, and upset tank body makes uncovered court
Under, dried coal sample can be drawn off.
Understandable, below in conjunction with the accompanying drawings to this in order to enable the above-mentioned purpose of the present invention, feature and advantage to become apparent from
Bright detailed description of the invention is described in detail.
Elaborate detail in the following description so that fully understanding the present invention.But the present invention can with multiple not
Being same as alternate manner described here to implement, those skilled in the art can do class in the case of intension of the present invention
Like promoting.Therefore the present invention is not limited by following public detailed description of the invention.
Refer to a kind of vacuum dryer that Fig. 1 and Fig. 2, Fig. 1 provided by a kind of detailed description of the invention of the present invention
Main regarding cross-sectional view；The left view of a kind of vacuum dryer that Fig. 2 is provided by a kind of detailed description of the invention of the present invention
Structural representation.
A kind of detailed description of the invention of the present invention provides a kind of vacuum dryer, including: frame 1, tank body 3, heating
Device and vacuum extractor and agitating device 10, tank body 3 is hinged in frame 1 by horizontally disposed two jointed shafts, tank
Body 3 top is provided with uncovered, and open-mouth is provided with cover 5, cover 5 and tank body 3 and is tightly connected, and heater is in tank body 3
Coal sample heats, and vacuum extractor is for extracting the air in tank body 3 and steam, and agitating device 10 is positioned at the bottom of tank body 3,
Coal sample in stirring tank body 3.
During the vacuum dryer that application the present embodiment provides, coal sample is put into from the uncovered of tank body 3, then passes through cover
5 seal uncovered, use heater to heat the coal sample in tank body 3, when being heated to design temperature, then pass through
Air in vacuum extractor extraction tank body 3, to reduce the pressure in tank body 3, and then the boiling point of reduction water, consequently facilitating be dried
Coal sample.Use the steam of vacuum extractor extraction vaporization, and formation negative pressure state around coal sample, the ectonexine of coal sample simultaneously
Between and surface and medium between form bigger moist gradient, accelerate vaporization rate, and then reach quick-drying purpose.
Wherein while evacuation, heater is also in heating.It is essential that by being positioned at the agitating device 10 bottom tank body 3, can
So that coal sample is uniformly heated, thus reach the purpose that Quick uniform is dried.After being dried, vacuum extractor stops
Work, makes the pressure inside and outside tank body 3 mutually balance, and then opens cover 5, upset tank body 3 make uncovered down, can after drying
Coal sample draw off.The most uncovered for traditional reducing, can more easily coal sample be drawn off, it is to avoid the feelings got stuck
Condition occurs.
Further, heater includes the first Infrared Heating unit 4 and the second Infrared Heating unit 2, and first infrared adds
Hot cell 4 is arranged on cover 5, and for directly heating the coal sample in tank body 3, the second Infrared Heating unit 2 is positioned at tank
On body 3, for the inwall of tank body 3 is heated.Wherein the light of the first Infrared Heating unit 4 acts directly in coal sample,
It is heated, it is possible to reduce heat at any time, uses the second Infrared Heating unit 2 to heat the inwall of tank body 3 simultaneously,
Therefore directly or indirectly coal sample can be heated, and then improve the efficiency of heating surface, thus provide foot to the moisture in coal sample
Enough heats, make evaporation and boiling carry out simultaneously, accelerate vaporization rate.Wherein the first Infrared Heating unit 4 includes Infrared Heating
Module, the second Infrared Heating unit 2 includes Far-infrared Heating module.
Further, vacuum extractor includes that exhaust tube 7, the first end of exhaust tube 7 stretch in tank body 3, exhaust tube 7
The second end be positioned at outside tank body 3, first end is provided with filter cylinder 6.Wherein can effectively prevent coal sample by filter cylinder 6 or other is miscellaneous
Matter is inhaled in exhaust tube 7 problem producing obstruction.
For the ease of rotating tank body 3, exhaust tube 7 extends transversely through a wherein jointed shaft.Therefore tank body 3 can rotated
During, it is to avoid exhaust tube 7 is also followed tank body 3 and is rotated.
Further, the deashing device remaining coal sample in clearing up tank body 3 is also included.Coal in being dried tank body 3
After sample draws off, can effectively be removed the residual coal sample in tank body 3 by deashing device, prevent the coal sample being dried with next time from occurring mixed
Close, and then the detection that impact is to coal sample, it is important that pass through deashing device, it is not necessary to staff is manual to clear up, and therefore may be used
To reduce the labor intensity of staff, improve work efficiency.
Wherein, deashing device includes the first deashing pipe being positioned on the blade of agitating device 10 and is positioned at exhaust tube 7
Second deashing pipe 8.Owing to the blade of agitating device 10 is easily adhered residual coal sample, therefore the first deashing pipe is set on blade,
Effectively the residual coal sample on blade can be cleared up.Filter cylinder can will be sticked to by the second deashing pipe 8 in exhaust tube 7
On 6, coal sample is cleared up.Other position in tank body 3 can also be cleared up by certain first deashing pipe and the second deashing pipe 8.
A kind of vacuum dryer that a kind of specific embodiment of the present invention is provided, also includes controlling tank body 3 in frame 1
The power set of upper rotation.Wherein can be fixed in frame 1 by jointed shaft by bearing, one end of jointed shaft is fixed on frame
On 1, the other end drives jointed shaft to rotate by motor, can realize tank body 3 and rotate in frame 1.Can certainly be passed through it
Its power set controls tank body 3 and rotates, and this is not limited by the present invention, specifically depends on the circumstances.
Further, a side of cover 5 and a side of tank body 3 are hinged.By cover 5 and tank body 3 are carried out hinged,
On the one hand can realize renovating, on the other hand when closing lid without centering, improve closing lid efficiency.
Further, also include, for controlling the hood-opening device that cover 5 rotates around its hinged place with tank body 3, uncapping
Device includes expansion link 11, and one end and the cover 5 of expansion link 11 are hinged, and the other end and the tank body 3 of expansion link 11 are hinged.Work as needs
When uncapping, can be by cover 5 jack-up by elongation expansion link 11；When needs closing lid, only need to shorten expansion link 11 can be by tank
Lid 5 is combined in the open-mouth of tank body 3.Therefore during folding cover 5, it is not necessary to staff manually carries out operational flip, enters
And reduce labor intensity, improve work efficiency.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality
Body makes a distinction with another entity, and not necessarily requires or imply the relation that there is any this reality between these entities
Or order.
Above a kind of vacuum dryer provided by the present invention is described in detail.Used herein the most individual
Principle and the embodiment of the present invention are set forth by example, and the explanation of above example is only intended to help to understand the present invention's
Core concept.It should be pointed out that, for those skilled in the art, in the premise without departing from the principle of the invention
Under, it is also possible to the present invention is carried out some improvement and modification, and these improve and modify the protection also falling into the claims in the present invention
In the range of.
Claims (9)
1. a vacuum dryer, it is characterised in that including: frame, tank body, heater and vacuum extractor and stirring
Device, described tank body is hinged in described frame by horizontally disposed two jointed shafts, and described tank body top is provided with uncovered, institute
Stating open-mouth to be provided with cover, described cover and described tank body and be tightly connected, described heater is for the coal in described tank body
Sample heats, and described vacuum extractor is for extracting the air in described tank body and steam, and described agitating device is positioned at described
The bottom of tank body, for stirring the coal sample in described tank body.
Vacuum dryer the most according to claim 1, it is characterised in that described heater includes the first Infrared Heating
Unit and the second Infrared Heating unit, described first Infrared Heating unit is arranged on described cover, in described tank body
Coal sample directly heat, described second Infrared Heating unit is positioned on described tank body, for entering the inwall of described tank body
Row heating.
Vacuum dryer the most according to claim 2, it is characterised in that described vacuum extractor includes exhaust tube, institute
The first end stating exhaust tube stretches in described tank body, and the second end of described exhaust tube is positioned at outside described tank body, and described first
End is provided with filter cylinder.
Vacuum dryer the most according to claim 3, it is characterised in that described exhaust tube extends transversely through a wherein institute
State jointed shaft.
Vacuum dryer the most according to claim 4, it is characterised in that also include remaining in clearing up described tank body
The deashing device of coal sample.
Vacuum dryer the most according to claim 5, it is characterised in that described deashing device includes being positioned at described stirring
The first deashing pipe on the blade of device and the second deashing pipe being positioned at described exhaust tube.
7. according to the vacuum dryer described in any one of claim 1 to 6, it is characterised in that also include controlling described tank body
The power set rotated in described frame.
Vacuum dryer the most according to claim 7 a, it is characterised in that side of described cover and described tank body
One side is hinged.
Vacuum dryer the most according to claim 8, it is characterised in that also include for control described cover around its with
The hood-opening device that the hinged place of described tank body rotates, described hood-opening device includes expansion link, one end of described expansion link and described
Cover is hinged, and the other end and the described tank body of described expansion link are hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032798.3A CN106322921B (en) | 2016-11-16 | 2016-11-16 | A kind of vacuum dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032798.3A CN106322921B (en) | 2016-11-16 | 2016-11-16 | A kind of vacuum dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106322921A true CN106322921A (en) | 2017-01-11 |
| CN106322921B CN106322921B (en) | 2019-03-08 |
Family
ID=57817168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611032798.3A Active CN106322921B (en) | 2016-11-16 | 2016-11-16 | A kind of vacuum dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106322921B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151487A (en) * | 2018-02-01 | 2018-06-12 | 长沙开元仪器股份有限公司 | A kind of saturating drying device of gas |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201340167Y (en) * | 2009-01-09 | 2009-11-04 | 深圳市鑫承诺科技有限公司 | Far infrared ray drying equipment |
| WO2012128151A1 (en) * | 2011-03-22 | 2012-09-27 | 三菱重工業株式会社 | Fluidized bed drying device |
| CN202837064U (en) * | 2012-10-12 | 2013-03-27 | 山东电力集团公司电力科学研究院 | Vacuum drying mixing device of coal samples |
| CN205245728U (en) * | 2015-12-19 | 2016-05-18 | 维西供销药材土产有限公司 | Low temperature medicinal material drying device |
-
2016
- 2016-11-16 CN CN201611032798.3A patent/CN106322921B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201340167Y (en) * | 2009-01-09 | 2009-11-04 | 深圳市鑫承诺科技有限公司 | Far infrared ray drying equipment |
| WO2012128151A1 (en) * | 2011-03-22 | 2012-09-27 | 三菱重工業株式会社 | Fluidized bed drying device |
| CN202837064U (en) * | 2012-10-12 | 2013-03-27 | 山东电力集团公司电力科学研究院 | Vacuum drying mixing device of coal samples |
| CN205245728U (en) * | 2015-12-19 | 2016-05-18 | 维西供销药材土产有限公司 | Low temperature medicinal material drying device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151487A (en) * | 2018-02-01 | 2018-06-12 | 长沙开元仪器股份有限公司 | A kind of saturating drying device of gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106322921B (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205690849U (en) | A kind of baked seed equipment | |
| CN207180255U (en) | A kind of hot air circulation drying baker for medicine particle drying | |
| CN205641864U (en) | High -efficient paulownia seed drying -machine | |
| CN105666671A (en) | Rotating curing box for cement concrete test blocks | |
| CN106322921A (en) | Vacuum drying device | |
| CN205897745U (en) | Take waste heat recovery unit's stirring drying -machine | |
| CN204227863U (en) | The saturating drying equipment of upset blanking type wind | |
| CN204678838U (en) | A kind of particle flash drying machine | |
| CN105032696B (en) | Supercritical carbon dioxide polyester button dyeing caldron and its dyeing | |
| CN208579570U (en) | A kind of multifunctional vacuum freeze drier | |
| CN206235109U (en) | Eider down drying device | |
| CN104957289A (en) | Water-removing method of tea leaves | |
| CN112629193B (en) | Negative pressure type bamboo drying machine | |
| CN209436177U (en) | A kind of Tea Production quick-dehydration device | |
| CN205658290U (en) | Horticulture is with vertical stoving case | |
| CN208293349U (en) | Hituminous sandstone aggregate dries dust-extraction unit | |
| CN207922708U (en) | A kind of drying unit of food additives | |
| CN204364935U (en) | A kind of Tupistra rhizome medicinal ingredient extractor | |
| CN205156545U (en) | Cylinder scraper desiccator | |
| CN107525371A (en) | A kind of stirring and drying machine with waste heat recovery plant | |
| CN208414403U (en) | A kind of dewatered drying installation for fermenting | |
| CN206777532U (en) | It is exclusively used in processing the full-automatic parcher of Chinese medicine | |
| CN205825638U (en) | A kind of Rhizoma Coptidis and the husky dehydrator separated | |
| CN220959286U (en) | Traditional chinese medicine decoction piece drying device | |
| CN214373784U (en) | Be used for soil to detect preliminary treatment drying-machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190517 Address after: 410100 Xingsha Industrial Base, Changlong Street, Changsha Economic and Technological Development Zone, Hunan Province, No. 1259, Liangtang East Road Patentee after: Kaiyuan Instrument Co., Ltd., Changsha Address before: 410100 No. 172 Kaiyuan Road, Changsha economic and Technological Development Zone, Hunan Patentee before: Changsha Kaiyuan Instruments Co., Ltd. |