CN220136017U - Heating furnace hearth and heating furnace - Google Patents
Heating furnace hearth and heating furnace Download PDFInfo
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- CN220136017U CN220136017U CN202320359264.0U CN202320359264U CN220136017U CN 220136017 U CN220136017 U CN 220136017U CN 202320359264 U CN202320359264 U CN 202320359264U CN 220136017 U CN220136017 U CN 220136017U
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- ceramic
- furnace
- furnace body
- fiber cotton
- fixed
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 239000000919 ceramic Substances 0.000 claims abstract description 118
- 229920000742 Cotton Polymers 0.000 claims abstract description 58
- 239000000835 fiber Substances 0.000 claims abstract description 48
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 23
- 239000002055 nanoplate Substances 0.000 claims abstract description 18
- 239000011449 brick Substances 0.000 claims description 26
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses a heating furnace hearth and a heating furnace. The heating furnace hearth is arranged on the inner side of the furnace body and comprises a nano plate, a 1260 ℃ ceramic fiber cotton blanket, a 1400 ℃ zirconium-containing ceramic fiber cotton blanket, a ceramic plate and a fixed locking structure; the nano plates are paved on the top of the furnace body and the inner sides of the two side surfaces; a 1260 ℃ ceramic fiber cotton blanket is paved on the inner side of the nano plate; a 1400 ℃ zirconium-containing ceramic fiber cotton blanket is paved on the inner side of the 1260 ℃ ceramic fiber cotton blanket; the ceramic plate is paved on the inner side of the 1400 ℃ zirconium-containing ceramic fiber cotton blanket; the nano plate, the 1260 ℃ ceramic fiber cotton blanket, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket and the ceramic plate are pressed and fixed on the furnace body by a fixed locking structure. The utility model can provide a heating furnace hearth which is corrosion-resistant, dust-free, free of daily maintenance, energy-saving and environment-friendly.
Description
Technical Field
The utility model relates to the technical field of heating furnaces, in particular to a heating furnace hearth and a heating furnace.
Background
In the heating furnace industry, from the inside of the hearth, the following common methods are available:
first kind: refractory bricks, insulating bricks and insulating cotton boards;
second kind: refractory bricks, insulating bricks and insulating cotton blankets;
third kind: all refractory bricks and insulating bricks;
fourth kind: all heat-insulating cotton blankets;
fifth: all heat-insulating cotton boards.
When the furnace atmosphere is strongly alkaline, the furnace lining can corrode refractory bricks, insulating bricks and the like in the first, second and third modes, the surfaces of the bricks can peel, and the corrosion, peeling and peeling of the bricks are aggravated under the condition that the furnace is flushed by air flow, so that the periodic maintenance is needed.
When the fourth mode and the fifth mode are used, the heat insulation cotton blanket or the heat insulation cotton board has high-temperature contractibility, gaps are generated at the spliced positions of the heat insulation cotton blanket or the heat insulation cotton board to generate thermal short circuits, heat in the furnace possibly overflows from the gaps to the furnace shell sheet metal position, the surface temperature rise of the furnace shell sheet metal is excessively high, and the energy consumption is increased. Meanwhile, after the heat-insulating cotton blanket or the heat-insulating cotton board is used for a long time, the surface of the heat-insulating cotton blanket or the heat-insulating cotton board can be subjected to pulverization, produced dust can pollute the produced product, and meanwhile, the dust overflows into the air to influence the physical health of workers in a production workshop.
Disclosure of Invention
The embodiment of the utility model provides a heating furnace hearth which is corrosion-resistant, dust-free, free of daily maintenance, energy-saving and environment-friendly, and can solve the technical problems that the prior furnace hearth internal structure is not suitable for strong alkalinity of the furnace atmosphere environment, so that refractory bricks and heat-insulating bricks are corroded, and because heat-insulating cotton blankets or heat-insulating cotton boards have high-temperature contractibility, gaps are generated at the joints of the heat-insulating cotton blankets or the heat-insulating cotton boards to generate thermal short circuits, heat in the furnace is likely to overflow from the gaps to furnace shell sheet metal, and the surface temperature rise of the furnace shell sheet metal is excessively high, so that the energy consumption is increased.
The embodiment of the utility model provides a heating furnace hearth which is arranged on the inner side of a furnace body, wherein the heating furnace hearth comprises:
the nano plates are paved on the top of the furnace body and the inner sides of the two side surfaces;
1260 ℃ ceramic fiber cotton blanket is paved on the inner side of the nano plate;
a 1400 ℃ zirconium-containing ceramic fiber cotton blanket laid on the inner side of the 1260 ℃ ceramic fiber cotton blanket;
a ceramic plate paved on the inner side of the 1400 ℃ zirconium-containing ceramic fiber cotton blanket;
and fixing a locking structure, and compacting and fixing the nano plate, the 1260 ℃ ceramic fiber cotton blanket, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket and the ceramic plate on the furnace body.
Further, the fixed locking structure includes:
the fixed sleeve is fixed on the furnace body; the fixed sleeve is provided with a first pin hole;
the first end of the ceramic screw is provided with external threads, and the second end of the ceramic screw is provided with a second pin hole; one side of the second end of the ceramic screw penetrates through the ceramic plate, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket, the 1260 ℃ ceramic fiber cotton blanket and the nano plate and stretches into the fixing sleeve, and the second pin hole is arranged corresponding to the first pin hole;
the fixed pin shaft penetrates through the second pin hole and the first pin hole, and the second end of the ceramic screw is fixed in the fixed sleeve;
the ceramic nut is provided with internal threads; the ceramic nut is threadably connected to a first end of the ceramic screw.
Further, the second pin hole has the same diameter as the first pin hole.
Further, the fixed pin shaft comprises a clamping head part and a rod body, the clamping head part is in a T shape, the diameter of the clamping head part is larger than that of the first pin hole, the diameter of the rod body is smaller than that of the first pin hole, and a through hole is formed in one end, far away from the clamping head part, of the rod body; the fixed locking structure further comprises a cotter pin, and the cotter pin is fixed in the through hole.
Further, the ceramic plate is provided with a fixing hole, the ceramic screw penetrates through the fixing hole, the diameter of the ceramic nut is larger than that of the fixing hole, and the ceramic nut can be tightly pressed on the surface of the ceramic plate when being in threaded connection with the ceramic screw.
Further, the heating furnace hearth further comprises:
the refractory brick insulating bricks are laid on the inner side of the bottom of the furnace body; and paving the ceramic plate on the upper part of the refractory brick insulating brick.
Further, the thickness of the ceramic plate ranges from 20mm to 40mm.
Furthermore, the joint of the 1260 ℃ ceramic fiber cotton blanket, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket and the ceramic plate is connected in a mode of mutually staggered buckling of two L-shaped buckle plates; wherein an expansion gap is arranged between the two L-shaped buckle plates at the joint of the ceramic plates.
The utility model also provides a heating furnace, comprising:
the furnace body is provided with a bottom, a top and two side surfaces;
the heating furnace hearth is arranged on the inner side of the furnace body;
the conveying device is arranged in the furnace body in parallel with the bottom of the furnace body;
and the heating device is arranged parallel to the conveying device.
Further, the conveying device includes:
the driving roller bars are arranged parallel to the bottom of the furnace body, and both ends of the driving roller bars extend to the outer side of the furnace body;
the driving roller rod sleeves are sleeved at two ends of each driving roller rod and are fixed on the outer surface of the furnace body;
the driving bearing seat is arranged between the end part of the driving roller rod and the driving roller rod sleeve;
and the driving sprocket is arranged at least one end of the driving roller rod.
Further, the heating device includes:
the upper heating element is arranged above the conveying device in parallel and is fixed in the furnace body;
the lower heating element is arranged below the conveying device in parallel and is fixed in the furnace body.
The heating furnace hearth and the heating furnace provided by the embodiment of the utility model are formed by compounding a plurality of materials, and can provide a heating furnace hearth which is corrosion-resistant, dust-free, free of daily maintenance, energy-saving and environment-friendly.
Drawings
The technical solution and other advantageous effects of the present utility model will be made apparent by the following detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a hearth of a heating furnace according to an embodiment of the present utility model.
FIG. 2 is a schematic diagram of a butt joint structure of a 1200 ℃ ceramic fiber thermal insulation material and a 1200 ℃ zirconium-containing ceramic fiber thermal insulation material provided by an embodiment of the utility model;
fig. 3 is a schematic diagram of a butt joint structure of ceramic plates according to an embodiment of the present utility model;
fig. 4 is a partial enlarged view of the position of the fixed locking structure according to the embodiment of the present utility model.
Wherein: 1. a furnace body; 2. a nano-plate; 3. 1260 ℃ ceramic fiber cotton blanket; 4. 1400 ℃ zirconium-containing ceramic fiber cotton blanket; 5. a ceramic plate; 6. a ceramic nut; 7. ceramic screws; 8. fixing the sleeve; 9. a cotter pin; 10. a fixed pin shaft; 11. an upper heating element; 12. a heated workpiece; 13. a drive roller bar; 14. a drive sprocket; 15. a driving bearing seat; 16. a drive roller sleeve; 17. a lower heating element; 18. a silicon carbide tube; 19. refractory brick insulating brick.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Specifically, referring to fig. 1, an embodiment of the present utility model provides a heating furnace hearth, which is installed on an inner side of a furnace body 1, wherein the heating furnace hearth includes: the nano plate 2, the 1260 ℃ ceramic fiber cotton blanket 3, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket 4, the ceramic plate 5 and the fixed locking structure.
Wherein the nano-plates 2 are paved on the top of the furnace body 1 and on the inner sides of the two side surfaces; 1260 ℃ ceramic fiber cotton blanket 3 is paved on the inner side of the nano plate 2; a 1400 ℃ zirconium-containing ceramic fiber blanket 4 is laid on the inner side of the 1260 ℃ ceramic fiber blanket 3; the ceramic plate 5 is paved on the inner side of the 1400 ℃ zirconium-containing ceramic fiber cotton blanket 4; the nano plate 2, the 1260 ℃ ceramic fiber cotton blanket 3, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket 4 and the ceramic plate 5 are pressed and fixed on the furnace body 1 by a fixed locking structure.
The heat insulating materials in the 1260 ℃ ceramic fiber cotton blanket and the 1400 ℃ zirconium-containing ceramic fiber cotton blanket comprise, but are not limited to, fiber cotton blanket, fiber cotton board and other heat insulating materials and the like. Ceramic materials of the ceramic plate 5 include, but are not limited to, alumina-containing ceramics, fused silica, corundum mullite, and the like.
Referring to fig. 1 and 4, the fixing and locking structure includes: ceramic nut 6, ceramic screw 7, fixed sleeve 8 and fixed round pin axle 10. The fixed sleeve 8 is fixed on the furnace body 1; the fixed sleeve 8 is provided with a first pin hole; the first end of the ceramic screw 7 is provided with external threads, and the second end of the ceramic screw is provided with a second pin hole; a second end side of the ceramic screw 7 passes through the ceramic plate 5, the 1400 ℃ zirconium-containing ceramic fiber blanket 4, the 1260 ℃ ceramic fiber blanket 3 and the nano plate 2 and stretches into the fixing sleeve 8, and the second pin hole is arranged corresponding to the first pin hole; the fixed pin shaft 10 penetrates through the second pin hole and the first pin hole, and the second end of the ceramic screw 7 is fixed in the fixed sleeve 8; the ceramic nut 6 is provided with internal threads; the ceramic nut 6 is screwed to a first end of the ceramic screw 7.
Further, the second pin hole has the same diameter as the first pin hole.
Further, the fixed pin shaft 10 includes a T-shaped clamping head and a rod body, the diameter of the clamping head is larger than that of the first pin hole, the diameter of the rod body is smaller than that of the first pin hole, and a through hole is formed in one end of the rod body away from the clamping head; the fixed locking structure further comprises a cotter pin 9, and the cotter pin 9 is fixed in the through hole.
Further, the ceramic plate 5 is provided with a fixing hole, the ceramic screw 7 passes through the fixing hole, the diameter of the ceramic nut 6 is larger than that of the fixing hole, and the ceramic nut 6 can be tightly pressed on the surface of the ceramic plate 5 when being in threaded connection with the ceramic screw 7.
Referring to fig. 1, the heating furnace hearth further includes: refractory brick insulating bricks 19 are laid on the inner side of the bottom of the furnace body 1; the ceramic plate 5 is laid on the upper part of the refractory brick insulating brick 19.
Further, the thickness of the ceramic plate 5 is in the range of 20mm to 40mm.
Referring to fig. 2 and 3, the joint of the 1260 ℃ ceramic fiber cotton blanket 3, the 1400 ℃ zirconium-containing ceramic fiber cotton blanket 4 and the ceramic plate 5 is connected in a manner of mutually staggered buckling of two L-shaped buckle plates; wherein a reserved expansion gap is arranged between the two L-shaped pinch plates at the splicing position of the ceramic plate 5.
The utility model also provides a heating furnace, comprising: the furnace body 1 is provided with a bottom, a top and two side surfaces; the heating furnace hearth is arranged on the inner side of the furnace body 1; the conveying device is arranged in the furnace body 1 in parallel with the bottom of the furnace body 1; and the heating device is arranged parallel to the conveying device.
Further, the conveying device includes: a plurality of driving roller bars 13 arranged parallel to the bottom of the furnace body 1, and both ends of which extend to the outside of the furnace body 1; the driving roller rod sleeves 16 are sleeved at two ends of each driving roller rod 13 and are fixed on the outer surface of the furnace body 1; a drive shaft socket 15 mounted between an end of the drive roller bar 13 and the drive roller bar sleeve 16; a drive sprocket 14 provided at least one end of the drive roller bar 13.
Further, the heating device includes: the upper heating element 11 is arranged above the conveying device in parallel and is fixed in the furnace body 1; the lower heating element 17 is arranged below the conveying device in parallel and is fixed in the furnace body 1.
Preferably, silicon carbide tubes 18 are provided on the outside of the upper and lower heating elements 11, 17. The heated workpiece 12 may be placed on a conveyor to pass through the furnace hearth in the extending direction of the furnace by the drive sprocket 14 in the arrangement direction of the plurality of drive roller bars 13.
The heating furnace hearth and the heating furnace provided by the embodiment of the utility model are formed by compounding a plurality of materials, and can provide a heating furnace hearth which is corrosion-resistant, dust-free, free of daily maintenance, energy-saving and environment-friendly.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The hearth of the heating furnace and the heating furnace provided by the embodiment of the utility model are described in detail, and specific examples are applied to the description of the principle and the implementation mode of the utility model, and the description of the above examples is only used for helping to understand the technical scheme and the core idea of the utility model; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. A heating furnace hearth installed inside a furnace body (1), characterized in that the heating furnace hearth comprises: the nano plates (2) are paved on the top of the furnace body (1) and on the inner sides of the two side surfaces; 1260 ℃ ceramic fiber cotton blanket (3) laid on the inner side of the nano plate (2); a 1400 ℃ zirconium-containing ceramic fiber cotton blanket (4) laid on the inner side of the 1260 ℃ ceramic fiber cotton blanket (3); a ceramic plate (5) laid on the inner side of the 1400 ℃ zirconium-containing ceramic fiber cotton blanket (4); and fixing a locking structure, and tightly fixing the nano plate (2), the 1260 ℃ ceramic fiber cotton blanket (3), the 1400 ℃ zirconium-containing ceramic fiber cotton blanket (4) and the ceramic plate (5) on the furnace body (1).
2. The furnace chamber of claim 1, wherein the fixed locking structure comprises: a fixed sleeve (8) fixed on the furnace body (1); the fixed sleeve (8) is provided with a first pin hole; the first end of the ceramic screw (7) is provided with external threads, and the second end of the ceramic screw is provided with a second pin hole; one side of the second end of the ceramic screw (7) penetrates through the ceramic plate (5), the 1400 ℃ zirconium-containing ceramic fiber cotton blanket (4), the 1260 ℃ ceramic fiber cotton blanket (3) and the nano plate (2) and stretches into the fixing sleeve (8), and the second pin hole is arranged corresponding to the first pin hole; the fixed pin shaft (10) is arranged in the second pin hole and the first pin hole in a penetrating manner, and the second end of the ceramic screw (7) is fixed in the fixed sleeve (8); a ceramic nut (6) provided with an internal thread; the ceramic nut (6) is screwed to a first end of the ceramic screw (7).
3. The furnace hearth of claim 2, wherein said second pin bore is the same diameter as said first pin bore.
4. A furnace hearth according to claim 3, characterized in that the fixed pin (10) comprises a clamping head and a rod body, the clamping head is T-shaped, the diameter of the clamping head is greater than the diameter of the first pin hole, the diameter of the rod body is smaller than the diameter of the first pin hole, and a through hole is arranged at one end of the rod body away from the clamping head; the fixed locking structure further comprises a cotter pin (9), and the cotter pin (9) is fixed in the through hole.
5. Furnace hearth according to claim 2, characterized in that the ceramic plate (5) is provided with a fixing hole through which the ceramic screw (7) passes, the diameter of the ceramic nut (6) being greater than the diameter of the fixing hole, the ceramic nut (6) being capable of pressing against the surface of the ceramic plate (5) when screwed onto the ceramic screw (7).
6. The furnace hearth of claim 1, wherein the furnace hearth further comprises: the refractory brick insulating bricks (19) are laid on the inner side of the bottom of the furnace body (1); and paving the ceramic plate (5) on the upper part of the refractory brick insulating brick (19).
7. Furnace hearth according to claim 1, characterized in that the thickness of the ceramic plate (5) ranges from 20mm to 40mm.
8. The hearth of the heating furnace according to claim 1, characterized in that the joints of the 1260 ℃ ceramic fiber cotton blanket (3), the 1400 ℃ zirconium-containing ceramic fiber cotton blanket (4) and the ceramic plate (5) are connected in a mutually staggered buckling manner by two L-shaped buckle plates; wherein an expansion gap is arranged between the two L-shaped buckle plates at the splicing position of the ceramic plate (5).
9. A heating furnace, characterized by comprising: the furnace body (1) is provided with a bottom, a top and two side surfaces; the furnace hearth of any one of claims 1 to 7, mounted inside said furnace body (1); the conveying device is arranged in the furnace body (1) in parallel with the bottom of the furnace body (1); and the heating device is arranged parallel to the conveying device.
10. The heating furnace according to claim 9, wherein the conveying means comprises: a plurality of driving roller bars (13) which are arranged parallel to the bottom of the furnace body (1) and the two ends of which extend to the outer side of the furnace body (1); the driving roller rod sleeves (16) are sleeved at two ends of each driving roller rod (13) and are fixed on the outer surface of the furnace body (1); a drive bearing block (15) mounted between the end of the drive roller bar (13) and the drive roller bar sleeve (16); a drive sprocket (14) provided at least one end of the drive roller bar (13); the heating device includes: the upper heating element (11) is arranged above the conveying device in parallel and is fixed in the furnace body (1); the lower heating elements (17) are arranged below the conveying device in parallel and are fixed in the furnace body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320359264.0U CN220136017U (en) | 2023-03-02 | 2023-03-02 | Heating furnace hearth and heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320359264.0U CN220136017U (en) | 2023-03-02 | 2023-03-02 | Heating furnace hearth and heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220136017U true CN220136017U (en) | 2023-12-05 |
Family
ID=88948965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320359264.0U Active CN220136017U (en) | 2023-03-02 | 2023-03-02 | Heating furnace hearth and heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220136017U (en) |
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2023
- 2023-03-02 CN CN202320359264.0U patent/CN220136017U/en active Active
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