CN207487381U - Vacuum electric furnace - Google Patents
Vacuum electric furnace Download PDFInfo
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- CN207487381U CN207487381U CN201721400030.7U CN201721400030U CN207487381U CN 207487381 U CN207487381 U CN 207487381U CN 201721400030 U CN201721400030 U CN 201721400030U CN 207487381 U CN207487381 U CN 207487381U
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- furnace
- conductive rod
- vacuum electric
- thermal insulation
- sealing element
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Abstract
The utility model discloses a kind of vacuum electric furnace, including：Furnace shell defines furnace chamber in furnace shell, and the burner hearth penetrated through with furnace chamber is defined in the furnace lining of furnace shell, and furnace shell is equipped with the furnace chamber mouth connected with furnace chamber；Conductive rod, conductive rod are formed as column, and conductive rod passes through furnace chamber mouth and at least part stretches into furnace chamber, is spaced apart between conductive rod and burner hearth and defines gap；Sealing element, sealing element are located in furnace chamber mouth and only to furnace shell and conductive rod with closed furnace accents；Fastener, fastener are located on furnace shell, and lock chamber is defined in fastener to compress sealing element.According to the vacuum electric furnace of the utility model embodiment, by setting sealing element and fastener, the effectively leakproofness of enhancing vacuum electric furnace, ensure to maintain vacuum state in furnace chamber for a long time, it is ensured that technique productions requirement, the vacuum electric furnace are simple in structure, sealing effect is good, service life is long, reduces replacement frequency, reduces hand labor intensity.
Description
Technical field
The utility model is related to technical field of production of sponge titanium, more particularly, to a kind of vacuum electric furnace.
Background technology
At present, domestic titanium sponge production distilation process leads to conductive rod using rubber plug the wound inside burner hearth
Face is sealed, and since furnace temperature is excessively high and metal itself heat-transfer effect is good, the spoilage for leading to rubber plug is larger, rubber plug
It after damage, need to manually be replaced, not only time-consuming and laborious and replacement difficulty is big.
In the actual production process, rubber plug damage after can only converter processing, not only expend a large amount of manpower and materials with
And energy consumption, and the interruption of production process can also impact Sponge Titanium quality.After damage if without replacing, stove
Interior vacuum degree cannot be guaranteed, so as to which reactor can be caused to be directed under by vacuum action pressure at high operating temperatures in modification damage simultaneously
Disconnected production process causes production accident.
Therefore, the sealing of retort conductive rod is particularly important, the sealing means of rubber plug is used in original design
Spoilage is larger, and it is the key that solve the above problems to find new plugging device or method.
Utility model content
The utility model is intended to solve one of above-mentioned technical problem at least to a certain extent.
For this purpose, the utility model proposes a kind of vacuum electric furnaces simple in structure, sealing effect is good.
According to the vacuum electric furnace of the utility model embodiment, including：Furnace shell defines furnace chamber, the furnace lining of furnace shell in furnace shell
The burner hearth penetrated through with furnace chamber is inside defined, furnace shell is equipped with the furnace chamber mouth connected with furnace chamber；Conductive rod, conductive rod are formed as column,
Conductive rod passes through furnace chamber mouth and at least part stretches into furnace chamber, is spaced apart between conductive rod and burner hearth and defines gap；Sealing element,
Sealing element is located in furnace chamber mouth and only to furnace shell and conductive rod with closed furnace accent；Fastener, fastener are located on furnace shell, fastening
Lock chamber is defined in part to compress sealing element.
According to the vacuum electric furnace of the utility model embodiment, by setting sealing element and fastener, effectively enhance vacuum electric
The leakproofness of the furnace chamber mouth of stove ensures to maintain vacuum state in furnace chamber for a long time, it is ensured that technique productions requirement prevents vacuum electric furnace
The quality of production of titanium sponge is influenced due to vacuum degree is bad, the vacuum electric furnace sealing effect is good, and service life is long, reduces vacuum electric
The frequency of maintenance of stove.
In addition, according to the utility model embodiment vacuum electric furnace, there can also be following additional technical characteristic：
One embodiment according to the present utility model, the sealing element include：Multiple cellucotton parts, multiple cellucottons
Part is respectively provided at the part for stretching into the furnace chamber of the conductive rod and along the axially spaced arrangement of the conductive rod, adjacent to institute
At least part for stating the cellucotton part of furnace chamber mouth only supports the furnace shell to close the furnace chamber mouth；Asbestos washer, it is described
Asbestos washer is located between the two neighboring cellucotton part.
One embodiment according to the present utility model, the vacuum electric furnace further include：Connecting portion, the connecting portion are formed as
Hollow columnar, one end of the connecting portion are connected with the furnace shell, and the other end of the connecting portion is connected with the fastener, institute
State the internal face that sealing element is located in the cavity of the connecting portion and only supports the connecting portion.
One embodiment according to the present utility model, the fastener are formed as two supported flanges, two compressions
Flange separation, which is opened, limits the lock chamber, and two supported flanges are bolted.
One embodiment according to the present utility model, the vacuum electric furnace further include：At least one gasket seal, at least one
A gasket seal is located between two supported flanges and the only outside wall surface to the conductive rod and the connecting portion
The other end.
One embodiment according to the present utility model, the gasket seal are two, and two gasket seals are described in
The axially spaced arrangement of conductive rod.
One embodiment according to the present utility model, the vacuum electric furnace further include：Insulating sleeve, the insulation sleeve pipe sleeve
It is located at the outside wall surface of the bolt and only supports the gasket seal.
One embodiment according to the present utility model, the vacuum electric furnace further include：First thermal insulation barriers, described first is heat-insulated
Part is set in the outside wall surface of the conductive rod and at least part is stretched into the burner hearth, between the first thermal insulation barriers closing is described
A part for gap；Second thermal insulation barriers, second thermal insulation barriers are with first thermal insulation barriers in the axially spaced of the conductive rod
Arrangement, second thermal insulation barriers are located on the furnace chamber mouth and at least part is stretched into the burner hearth.
One embodiment according to the present utility model, the second thermal insulation barriers are connected with the sealing element, second thermal insulation barriers
Section be generally formed into L-shaped.
One embodiment according to the present utility model, first thermal insulation barriers and second thermal insulation barriers are respectively formed as resistance to
Warm insulating sleeve.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the sectional view according to the vacuum electric furnace of the utility model embodiment.
Reference numeral：
Vacuum electric furnace 100；
Furnace shell 10；Furnace lining 11；
Conductive rod 20；
Sealing element 30；Cellucotton part 31；Asbestos washer 32；
Fastener 40；Bolt 41；
Connecting portion 50；
Gasket seal 60；
Insulating sleeve 70；
First thermal insulation barriers 80；Second thermal insulation barriers 81；
Handle 90.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that the utility model
Limitation.
In the description of the present invention, it is to be appreciated that term " " center ", " on ", " under ", " vertical ", " level ",
The orientation or position relationship of the instructions such as " top ", " bottom ", " interior ", " outer ", " clockwise ", " counterclockwise " are based on side shown in the drawings
Position or position relationship are for only for ease of description the utility model and simplify description rather than instruction or imply signified device
Or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the utility model
Limitation.In addition, term " first ", " second " be only used for description purpose, and it is not intended that instruction or imply relative importance or
Person implies the quantity for indicating indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or hidden
Include one or more this feature containing ground.In the description of the present invention, " multiple " be meant that two or two with
On, unless otherwise specifically defined.
In the utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.
The vacuum electric furnace 100 according to the utility model embodiment is specifically described below in conjunction with the accompanying drawings.
As shown in Figure 1, furnace shell 10, conductive rod 20, sealing element are included according to the vacuum electric furnace 100 of the utility model embodiment
30 and fastener 40.
Specifically, defining furnace chamber in furnace shell 10, the burner hearth penetrated through with furnace chamber, stove are defined in the furnace lining 11 of furnace shell 10
Shell 10 is equipped with the furnace chamber mouth connected with furnace chamber, and conductive rod 20 is formed as column, and conductive rod 20 passes through furnace chamber mouth and at least part
Furnace chamber is stretched into, is spaced apart between conductive rod 20 and burner hearth and defines gap, sealing element 30 is located in furnace chamber mouth and only supports furnace shell 10
With conductive rod 20 with closed furnace accent, fastener 40 is located on furnace shell 10, and lock chamber is defined in fastener 40 to compress sealing
Part 30.
In other words, according to the vacuum electric furnace of the utility model embodiment 100 mainly by furnace shell 10, conductive rod 20, sealing element
30 and fastener 40 form.Vacuum electric furnace 100 can be machined with furnace shell 10, and the inside of furnace shell 10 can be machined with furnace chamber, furnace shell
10 can also be machined with the furnace chamber mouth connected with furnace chamber, and the distilation technique of titanium sponge can be carried out in furnace chamber.On furnace shell 10
Furnace lining 11 can be machined with, burner hearth can be machined in furnace lining 11, burner hearth can be mutually communicated with furnace chamber.Conductive rod 20 can be big
Cylinder is processed into cause, and the front end of conductive rod 20 can pass through the other end of burner hearth by one end of burner hearth.Before conductive rod 20
The part at end can be stretched into furnace chamber, it is ensured that conductive rod 20 can give the titanium sponge distilled in furnace chamber normal power transmission for a long time.It is conductive
The rear end part of stick 20 can be fixed by handle 90.It can be spaced apart between conductive rod 20 and burner hearth and define gap,
It is stretched into furnace chamber by burner hearth convenient for conductive rod 20.Sealing element 30 may be mounted in furnace chamber mouth, and sealing element 30 is in furnace chamber mouth
Can the vacuum degree in furnace chamber can be ensured with Sealing furnace accent by installing sealing element 30 tight against conductive rod 20 and furnace shell 10.Tightly
Firmware 40 may be mounted on furnace shell 10, and fastener 40 can define lock chamber, and fastener 40 can will be close by lock chamber
Sealing 30 is pressed on furnace chamber mouth, further improves the leakproofness of vacuum electric furnace 100.
As a result, according to the vacuum electric furnace of the utility model embodiment 100, by setting sealing element 30 and fastener 40, have
The leakproofness of effect enhancing vacuum electric furnace 100, ensures to maintain vacuum state in furnace chamber for a long time, meets technique productions requirement, prevents
Vacuum electric furnace 100 influences the quality of production of titanium sponge due to vacuum degree is bad, and 100 sealing effect of vacuum electric furnace is good, uses the longevity
Life length reduces the frequency of maintenance of vacuum electric furnace 100.
Optionally, one embodiment according to the present utility model, sealing element 30 include multiple cellucotton parts 31 and asbestos pad
Piece 32.
Specifically, multiple cellucotton parts 31 are respectively provided at the part for stretching into furnace chamber of conductive rod 20 and along the axis of conductive rod 20
To arranged spaced apart, at least part of the cellucotton part 31 of neighbouring furnace chamber mouth only supports furnace shell 10 with closed furnace accent, asbestos pad
Piece 32 is located between two neighboring cellucotton part 31.
That is, sealing element 30 is mainly made of multiple cellucotton parts 31 and asbestos washer 32.Wherein, furnace chamber is stretched into
It can be spaced apart in the axial direction of conductive rod 20 and be arranged with multiple cellucotton parts 31, can pacified between adjacent two cellucotton parts 31
Equipped with asbestos washer 32, multiple cellucotton parts 31 can be tight against furnace shell 10 with Sealing furnace accent, by two adjacent fibers
Asbestos washer 32 between cotton part 31 is installed, further enhances the leakproofness of sealing element 30.Alumina silicate may be used in cellucotton part 31
Cellucotton is made, and aluminosilicate fiber cotton has good heat resistance and insulating properties, improves the service life of sealing element 30, solves
The problem of sealing element 30 is easily damaged due to 100 temperature of vacuum electric furnace is excessively high, reduces the replacement frequency of vacuum electric furnace 100, carries
High efficiency.The asbestos washer 32 of mechanism may be used in asbestos washer 32, and molding easy to process reduces production cost.
In some specific embodiments of the utility model, vacuum electric furnace 100 further includes connecting portion 50.
Specifically, connecting portion 50 is formed as hollow columnar, and one end of connecting portion 50 is connected with furnace shell 10, connecting portion 50 it is another
One end is connected with fastener 40, and sealing element 30 is located in the cavity of connecting portion 50 and only supports the internal face of connecting portion 50.
In other words, vacuum electric furnace 100 can also include connecting portion 50.Connecting portion 50 can be processed into hollow columnar, lead
Torch 20 can may be mounted to pass through the cavity of connecting portion 50, one end of connecting portion 50 on furnace shell 10, connecting portion 50 it is another
End can be connected with fastener 40, sealing element 30 may be mounted in the cavity of connecting portion 50, sealing element 30 can and connecting portion
50 internal face offsets.By setting connecting portion 50, convenient for installing fastener 40 on furnace shell 10, will be connected by fastener 40
Sealing element 30 in 50 cavity of portion is pressed on furnace chamber mouth, improves the leakproofness of vacuum electric furnace 100.
One embodiment according to the present utility model, fastener 40 are formed as two supported flanges, between two supported flanges
It separates and limits lock chamber, two supported flanges are connected by bolt 41.
That is, sealing element 30 can be made of two supported flanges, two supported flanges, which can be spaced apart, to be limited
One lock chamber, two supported flanges can be connected by bolt 41, and two supported flanges can be by bolt 41 by sealing element
30 are pressed on furnace chamber mouth, sealing element 30 are made to be combined with furnace chamber mouth even closer.Sealing element 30 passes through spiral shell by two supported flanges
The mode that bolt 41 is assembled, easy to operate, fastening effect is good, and efficiency of assembling is high.
In some specific embodiments of the utility model, vacuum electric furnace 100 further includes at least one gasket seal 60.
Specifically, at least one gasket seal 60 be located between two supported flanges and only the outside wall surface to conductive rod 20 and
The other end of connecting portion 50.
In other words, vacuum electric furnace 100 can also include at least one gasket seal 60, and at least one gasket seal 60 can
To be mounted in the lock chamber of sealing element 30, at least one gasket seal 60 can only support the outside wall surface and connecting portion of conductive rod 20
50 other end when two supported flanges are compressed by bolt 41, can make gasket seal 60 be pressed further by sealing element 30,
Improve the leakproofness of vacuum electric furnace 100.It can also be to conductive rod 20 by installing at least one gasket seal 60 in lock chamber
Play the role of heat-insulated, insulation.
Preferably, in one embodiment of the utility model, gasket seal 60 is two, and two gasket seals 60 are along leading
The axially spaced arrangement of torch 20.By installing two gasket seals 60 in lock chamber, can lead in two supported flanges
When crossing the compression of bolt 41, gasket seal 60 is made to be pressed further by sealing element 30, improve the leakproofness of vacuum electric furnace 100.By
Two gasket seals 60 of installation can also be thermally shielded and insulate to conductive rod 20 in lock chamber.
In some specific embodiments of the utility model, vacuum electric furnace 100 further includes insulating sleeve 70.
Specifically, insulating sleeve 70 is set in the outside wall surface of bolt 41 and only supports gasket seal 60.
That is, vacuum electric furnace 100 can also include insulating sleeve 70.Insulating sleeve 70 may be mounted at bolt 41
On, insulating sleeve 70 can be tight against gasket seal 60.Insulating sleeve 70 can not only further improve the leakproofness of vacuum electric furnace
Can, also with good insulation performance and heat-proof quality.
One embodiment according to the present utility model, vacuum electric furnace 100 further include the first thermal insulation barriers 80 and the second thermal insulation barriers
81。
Specifically, the first thermal insulation barriers 80 are set in the outside wall surface of conductive rod 20 and at least part is stretched into burner hearth, and first
A part for 80 closing gap of thermal insulation barriers, the second thermal insulation barriers 81 and the first thermal insulation barriers 80 are in the axially spaced cloth of conductive rod 20
It puts, the second thermal insulation barriers 81 are located on furnace chamber mouth and at least part is stretched into burner hearth.
In other words, vacuum electric furnace 100 can also include the first thermal insulation barriers 80 and the second thermal insulation barriers 81.First thermal insulation barriers 80
It can be formed as hollow column, the first thermal insulation barriers 80 can be set on the conductive rod 20 in burner hearth, and the first thermal insulation barriers 80 can
A part of gap in burner hearth to be closed.Second thermal insulation barriers 81 can be set on furnace chamber mouth, and the second thermal insulation barriers 81 can
To be provided spaced with the first thermal insulation barriers 80, the first thermal insulation barriers 80 and 81 place spaced apart from each other of the second thermal insulation barriers can pass through
Sealing element 30 is attached.It, can be to true by installing the first thermal insulation barriers 80 and the second thermal insulation barriers 81 in the axial direction of conductive rod 20
Empty electric furnace 100 carry out effectively it is heat-insulated, ensure vacuum electric furnace 100 furnace chamber in temperature will not be dropped due to the heat transfer of conductive rod 20
It is low, increase the efficiency of heating surface of vacuum electric furnace 100.
In some specific embodiments of the utility model, the second thermal insulation barriers 81 are connected with sealing element 30, and second is heat-insulated
The section of part 81 is generally formed into L-shaped.
That is, the section of the second thermal insulation barriers 81 can be generally formed into L-shaped, section is the second thermal insulation barriers 81 of L-shaped
One side can be matched with conductive rod 20 with closed furnace accent, section can be with for the another side of the second thermal insulation barriers 81 of L-shaped
Sealing element 30 is connected, and can be matched with the cellucotton part 31 in sealing element 30 with close connecting portion 50 one of one end
Divide cavity.By in the cavity of connecting portion 50 install 30 and second thermal insulation barriers 81 of sealing element, conductive rod 20 can be carried out every
Heat, positioning and insulation, can be sealed furnace chamber mouth, ensure the vacuum degree of vacuum electric furnace 100, it is ensured that the matter of titanium sponge production
Amount, reduces the probability of happening of reaction process accident, and can have good heat-proof quality, it is ensured that the temperature in vacuum electric furnace 100
It will not be reduced due to the heat transfer of conductive rod 20, improve the efficiency of heating surface of vacuum electric furnace 100.
It is exhausted that one embodiment according to the present utility model, the first thermal insulation barriers 80 and the second thermal insulation barriers 81 are respectively formed as heatproof
Edge casing.Heatproof insulating sleeve has good heat-proof quality and insulation performance, can effectively improve the heating of vacuum electric furnace 100
Efficiency.
To sum up, according to the vacuum electric furnace 100 of the utility model embodiment, by setting sealing element 30 and fastener
40, effectively enhance the leakproofness of vacuum electric furnace 100, ensure to maintain vacuum state in furnace chamber for a long time, it is ensured that technique productions requirement.
By setting the first thermal insulation barriers 80 and the second thermal insulation barriers 81, effectively heat-insulated, guarantee vacuum electric furnace can be carried out to vacuum electric furnace 100
Temperature in 100 furnace chamber will not reduce due to the heat transfer of conductive rod 20, increase the efficiency of heating surface of vacuum electric furnace 100.The vacuum
Electric furnace 100 is simple in structure, and sealing effect is good, and service life is long, reduces replacement frequency, reduces hand labor intensity.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It is combined in an appropriate manner in any one or more embodiments or example.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it is impossible to be construed as a limitation of the present invention, those of ordinary skill in the art are not departing from the utility model
Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and
Modification.
Claims (10)
1. a kind of vacuum electric furnace, which is characterized in that including：
Furnace shell defines furnace chamber in the furnace shell, the burner hearth penetrated through with the furnace chamber is defined in the furnace lining of the furnace shell, described
Furnace shell is equipped with the furnace chamber mouth connected with the furnace chamber；
Conductive rod, the conductive rod are formed as column, and the conductive rod passes through the furnace chamber mouth and stretches at least partially described
Furnace chamber is spaced apart between the conductive rod and the burner hearth and defines gap；
Sealing element, the sealing element are located in the furnace chamber mouth and only support the furnace shell and the conductive rod to close the furnace chamber
Mouthful；
Fastener, the fastener are located on the furnace shell, and lock chamber is defined in the fastener to compress the sealing element.
2. vacuum electric furnace according to claim 1, which is characterized in that the sealing element includes：
Multiple cellucotton parts, multiple cellucotton parts are respectively provided at the part for stretching into the furnace chamber of the conductive rod and along institutes
The axially spaced arrangement of conductive rod is stated, at least part of the cellucotton part of the neighbouring furnace chamber mouth only supports the furnace shell
To close the furnace chamber mouth；
Asbestos washer, the asbestos washer are located between the two neighboring cellucotton part.
3. vacuum electric furnace according to claim 1, which is characterized in that further include：
Connecting portion, the connecting portion are formed as hollow columnar, and one end of the connecting portion is connected with the furnace shell, the connecting portion
The other end be connected with the fastener, the sealing element is located in the cavity of the connecting portion and only interior to the connecting portion
Wall surface.
4. vacuum electric furnace according to claim 3, which is characterized in that the fastener is formed as two supported flanges, and two
A supported flange, which is spaced apart, limits the lock chamber, and two supported flanges are bolted.
5. vacuum electric furnace according to claim 4, which is characterized in that further include：
At least one gasket seal, at least one gasket seal are located between two supported flanges and only support described lead
The other end of the outside wall surface of torch and the connecting portion.
6. vacuum electric furnace according to claim 5, which is characterized in that the gasket seal is two, two sealings
Axially spaced arrangement of the gasket along the conductive rod.
7. vacuum electric furnace according to claim 5, which is characterized in that further include：
Insulating sleeve, the insulating sleeve are set in the outside wall surface of the bolt and only support the gasket seal.
8. vacuum electric furnace according to claim 1, which is characterized in that further include：
First thermal insulation barriers, first thermal insulation barriers are set in the outside wall surface of the conductive rod and at least part stretches into the burner hearth
Interior, first thermal insulation barriers close the part in the gap；
Second thermal insulation barriers, second thermal insulation barriers are with first thermal insulation barriers in the axially spaced arrangement of the conductive rod, institute
The second thermal insulation barriers are stated to be located on the furnace chamber mouth and stretch into the burner hearth at least partially.
9. vacuum electric furnace according to claim 8, which is characterized in that the second thermal insulation barriers are connected with the sealing element, described
The section of second thermal insulation barriers is generally formed into L-shaped.
10. vacuum electric furnace according to claim 9, which is characterized in that first thermal insulation barriers and second thermal insulation barriers
It is respectively formed as heatproof insulating sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721400030.7U CN207487381U (en) | 2017-10-26 | 2017-10-26 | Vacuum electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721400030.7U CN207487381U (en) | 2017-10-26 | 2017-10-26 | Vacuum electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207487381U true CN207487381U (en) | 2018-06-12 |
Family
ID=62477770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721400030.7U Active CN207487381U (en) | 2017-10-26 | 2017-10-26 | Vacuum electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207487381U (en) |
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2017
- 2017-10-26 CN CN201721400030.7U patent/CN207487381U/en active Active
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