CN211316169U - Stainless steel furnace head structure with outer ring and multiple air passages - Google Patents
Stainless steel furnace head structure with outer ring and multiple air passages Download PDFInfo
- Publication number
- CN211316169U CN211316169U CN201922456611.8U CN201922456611U CN211316169U CN 211316169 U CN211316169 U CN 211316169U CN 201922456611 U CN201922456611 U CN 201922456611U CN 211316169 U CN211316169 U CN 211316169U
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- Prior art keywords
- outer ring
- plate
- injection pipe
- stainless steel
- air
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 32
- 239000010935 stainless steel Substances 0.000 title claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 68
- 239000007924 injection Substances 0.000 claims abstract description 68
- 239000007789 gas Substances 0.000 claims abstract description 62
- 239000002737 fuel gas Substances 0.000 claims abstract description 4
- 206010022000 influenza Diseases 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
A stainless steel furnace head structure with an outer ring and multiple air passages comprises an outer ring injection pipe, an inner injection pipe and an outer ring gas mixing cover which are all made of stainless steel; the outer ring injection pipe and the inner injection pipe are respectively manufactured by integrally forming a stainless steel pipe; a secondary mixing cavity for mixing air and fuel gas is arranged in the outer ring gas mixing cover; the bottom of the outer ring gas mixing cover is provided with an outer gas inlet hole, the upper part of the outer ring gas mixing cover is provided with a plurality of outer ring gas outlet pipes which are distributed at intervals, and the outer gas inlet hole and the outer ring gas outlet pipes are respectively communicated with the secondary mixing cavity; one end of the outer ring injection pipe is communicated with the outer air inlet hole, and one end of the inner injection pipe penetrates out of the outer ring air mixing cover upwards and is not communicated with the secondary mixing cavity. The utility model discloses outer loop draws and penetrates pipe, interior injection pipe and outer loop gas mixing cover and form by the stainless steel manufacturing, furnace end light in weight and difficult corruption.
Description
Technical Field
The utility model relates to a stainless steel furnace head structure of many air flues of outer loop.
Background
The combustor comprises a furnace end and a distributor arranged on the furnace end.
Wherein, the furnace end is generally integrally cast by cast iron. The problems are that the cast iron furnace end has the defects of easy corrosion, heavy weight, high heat storage, environmental pollution and the like, and the cast aluminum furnace end and the die-cast aluminum furnace end have the defects of low temperature resistance, easy deformation, low durability, high cost and the like, and have certain limitations.
In addition, the air and gas in conventional burners are mixed in two structures.
The first mixing is that when the gas is input into the ejector pipe, the air is brought into the ejector pipe under the action of negative pressure, and the gas and the air are conveyed in the ejector pipe and are mixed for the first time. The gas mixed for the first time is conveyed to the inside of the distributor for secondary mixing, and then is output from the distributor and ignited.
Namely, the gas and the air can be mixed for the first time in the furnace end and mixed for the second time in the fire distributor.
In actual use, the mixture of air and gas is not abundant, leads to the not abundant of burning, and the gas utilization ratio is low, forms carbon black easily on the distributor, has certain limitation.
Therefore, further improvements are needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stainless steel furnace end structure of many air flues of outer loop, its outer loop draws and penetrates pipe, interior injection pipe and outer loop gas mixing cover and form by the stainless steel manufacturing, and furnace end light in weight and difficult corruption.
The purpose of the utility model is realized like this:
a stainless steel furnace head structure with an outer ring and multiple air passages comprises an outer ring injection pipe, an inner injection pipe and an outer ring gas mixing cover which are all made of stainless steel;
a secondary mixing cavity for mixing air and fuel gas is arranged in the outer ring gas mixing cover;
the bottom of the outer ring gas mixing cover is provided with an outer gas inlet hole, the upper part of the outer ring gas mixing cover is provided with a plurality of outer ring gas outlet pipes which are distributed at intervals, and the outer gas inlet hole and the outer ring gas outlet pipes are respectively communicated with the secondary mixing cavity;
one end of the outer ring injection pipe is communicated with the outer air inlet hole, and one end of the inner injection pipe penetrates out of the outer ring air mixing cover upwards and is not communicated with the secondary mixing cavity.
The number of the outer ring air outlet pipes is four, and the outer ring air outlet pipes are uniformly distributed at the upper part of the outer ring air mixing cover along the circumferential direction.
The outer ring gas mixing cover comprises an annular bottom support, an annular inner surrounding plate, an annular outer surrounding plate and an upper cover plate, wherein the annular inner surrounding plate is connected to the edge of the inner side of the annular bottom support and extends upwards;
a secondary mixing cavity is defined among the annular bottom support, the annular inner surrounding plate, the annular outer surrounding plate and the upper cover plate;
the outer air inlet hole is formed in the annular bottom support, the outer ring air outlet pipe is formed in the upper cover plate, and one end of the inner injection pipe extends into the center of the bottom of the annular bottom support and upwards penetrates out of the upper cover plate.
The upper surface of the upper cover plate is provided with annular bosses formed by stamping corresponding to the inner injection pipe and the outer ring air outlet pipe respectively, and the inner injection pipe and the outer ring air outlet pipe upwards penetrate out of the corresponding annular bosses.
The bottom of the outer ring air outlet pipe is provided with an annular skirt edge, the diameter of the annular skirt edge is gradually increased from top to bottom, and the annular skirt edge is abutted against the bottom surface of the upper cover plate.
The upper cover plate is provided with mounting holes for mounting an ignition needle and a thermocouple;
the mounting hole is positioned on the inner side of the annular inner enclosing plate, and the bottom of the mounting hole is provided with a positioning assembly;
the positioning assembly comprises a first flat plate arranged at the bottom of the upper cover plate and a bracket arranged at the bottom of the first flat plate;
the bracket comprises a second flat plate, a first vertical plate and a third flat plate, wherein the first vertical plate extends upwards from two opposite side edges of the second flat plate respectively, and the third flat plate extends outwards from the top of the first vertical plate;
the third flat plate is arranged at the bottom of the first flat plate, a through hole which penetrates through the first flat plate and the second flat plate and is opposite to the mounting hole is formed in the positioning assembly, and the diameter of the through hole is smaller than that of the mounting hole.
The bottom of the annular bottom support is provided with a fixed support;
the fixed support comprises a fourth flat plate, a second vertical plate and a fifth flat plate, wherein the second vertical plate extends upwards from the edges of the left side and the right side of the fourth flat plate respectively, and the fifth flat plate extends inwards from the top of the second vertical plate;
the fifth flat plate is arranged at the bottom of the annular bottom support, the outer ring injection pipe and the inner injection pipe are positioned between the second vertical plates at the left side and the right side of the fourth flat plate, and the fourth flat plate is positioned below the outer ring injection pipe and the inner injection pipe.
A fixing sheet for connecting the outer ring injection pipe and the inner injection pipe is arranged between the outer ring injection pipe and the inner injection pipe;
and air door baffles are arranged at the ends, far away from the positioning plate, of the outer ring injection pipe and the inner injection pipe.
The outer ring injection pipe and the inner injection pipe are respectively manufactured by integrally forming a stainless steel pipe.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a cross-sectional view of an embodiment of the present invention.
Fig. 3 is a partially enlarged view of the portion of fig. 2A.
Fig. 4 is an exploded view of a positioning assembly according to an embodiment of the present invention.
Fig. 5 is an exploded view of an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1-5, the stainless steel furnace head structure with outer ring and multiple gas passages comprises an outer ring injection pipe 101, an inner injection pipe 102 and an outer ring gas mixing cover 103 which are all made of stainless steel;
the outer ring injection pipe 101, the inner injection pipe 102 and the outer ring gas mixing cover 103 form a stainless steel furnace end, the stainless steel furnace end is light in weight and not prone to corrosion and deformation, long-term use of the stainless steel furnace end is facilitated, the consumption of raw materials is less than that of a cast iron furnace end, and the cost of the furnace end is effectively reduced.
In this embodiment, the outer ring ejector pipe 101 is located on the left side of the inner ejector pipe 102.
A secondary mixing chamber 1031 for mixing air and fuel gas is arranged in the outer ring gas mixing cover 103;
the bottom of the outer ring gas mixing cover 103 is provided with an outer gas inlet hole 1032, the upper part of the outer ring gas mixing cover 103 is provided with a plurality of outer ring gas outlet pipes 1033 which are arranged at intervals, the arrangement of the plurality of outer ring gas outlet pipes 1033 ensures that the stainless steel furnace head structure is provided with a plurality of outer ring fire conveying gas channels, and the outer gas inlet hole 1032 and the outer ring gas outlet pipes 1033 are respectively communicated with the secondary mixing chamber 1031;
one end of the outer ring injection pipe 101 is communicated with the outer air inlet hole 1032, and one end of the inner injection pipe 102 penetrates through the outer ring air mixing cover 103 upwards and is not communicated with the secondary mixing chamber 1031.
When this stainless steel furnace head structure of many air flues of outer loop was used, set up distributor (not drawn in the figure) on the outer loop gas mixing cover 103, distributor inside has outer ring fire air cavity, and the distributor bottom corresponds each outer loop outlet duct 1033 and is provided with the connecting pipe respectively, connecting pipe and outer ring fire air cavity intercommunication, connecting pipe and corresponding outer loop outlet duct 1033 butt joint installation.
In this embodiment, gas and air accomplish the primary mixing in the injection pipe 102 respectively in outer loop injection pipe 101, and the gas of primary mixing is carried and is carried outer loop gas mixing cover 103 inside and carry out the secondary mixing, and gas and air accomplish twice in the furnace end structure and mix again and carry to the distributor in promptly.
The setting of outer ring gas mixing cover 103 further promotes the mixture of gas and air, makes subsequent burning more abundant, improves the utilization ratio of gas, reduces the production of subsequent carbon black.
Further, the number of the outer ring gas outlet pipes 1033 is four, and the outer ring gas outlet pipes are uniformly distributed at the upper part of the outer ring gas mixing cover 103 along the circumferential direction.
The arrangement of the plurality of outer ring gas outlet pipes 1033 enables the mixed gas in the outer ring gas mixing cover 103 to be uniformly distributed to the inner part of the outer ring fire gas cavity of the fire distributor.
Further, the outer ring air mixing cover 103 includes a ring-shaped bottom support 7, a ring-shaped inner peripheral plate 1035 connected to the inner edge of the ring-shaped bottom support 7 and extending upward, a ring-shaped outer peripheral plate 1036 connected to the outer edge of the ring-shaped bottom support 7 and extending upward, and an upper cover plate 1037 disposed on the ring-shaped inner peripheral plate 1035 and the ring-shaped outer peripheral plate 1036;
a secondary mixing chamber 1031 is defined by the annular bottom support 7, the annular inner surrounding plate 1035, the annular outer surrounding plate 1036 and the upper cover plate 1037;
the outer air inlet hole 1032 is arranged on the annular bottom support 7, the outer air outlet pipe 1033 is arranged on the upper cover plate 1037, and one end of the inner injection pipe 102 extends into the center of the bottom of the annular bottom support 7 and upwards penetrates out of the upper cover plate 1037.
The outer air inlet hole 1032 is located on the left portion of the ring shoe 7.
The outer edge and the inner edge of the annular bottom support 7 are respectively provided with an outer upper flanging 1025 and an inner upper flanging 1026, and the outer edge of the upper cover plate 1037 is provided with a lower flanging 1027;
an annular outer peripheral panel 1036 is disposed inboard of outer upturn 1025 and downturn 1027, and an annular inner peripheral panel 1035 is disposed outboard of inner upturn 1026.
The annular bottom support 7, the annular inner surrounding plate 1035, the annular outer surrounding plate 1036, the upper cover plate 1037 and the outer annular air outlet pipe 1033 are fixed through welding.
Furthermore, the upper surface of the upper cover plate 1037 is provided with an annular boss 1038 formed by stamping corresponding to the inner ejector pipe 102 and the outer ring outlet pipe 1033, and the inner ejector pipe 102 and the outer ring outlet pipe 1033 penetrate through the corresponding annular boss 1038 upwards.
The outer ring induction pipe 101, the inner induction pipe 102 and the outer ring outlet pipe 1033 are finally fixed on the outer ring gas mixing cover 103 by welding.
Further, an annular skirt 1039 is arranged at the bottom of the outer ring air outlet pipe 1033, the diameter of the annular skirt 1039 is gradually increased from top to bottom, and the annular skirt 1039 abuts against the bottom surface of the upper cover plate 1037.
Further, the upper cover plate 1037 is provided with a mounting hole 1040 for mounting the ignition needle 28 and the thermocouple 29; that is, the number of the mounting holes 1040 is two and is respectively located at the right side and the front portion of the end of the inner injection pipe 102 penetrating through the upper cover plate 1037.
The ignition needle 28 is located at the front part of the end of the inner injection pipe 102 penetrating through the upper cover plate 1037, and the thermocouple 29 is located at the right side of the end of the inner injection pipe 102 penetrating through the upper cover plate 1037.
The mounting hole 1040 is located on the inner side of the annular inner surrounding plate 1035, and a positioning component is arranged at the bottom of the mounting hole 1040;
the positioning assembly comprises a first plate 414 disposed at the bottom of the upper cover plate 1037 and a bracket disposed at the bottom of the first plate 414;
the bracket comprises a second flat plate 415, a first vertical plate 416 and a third flat plate 417, wherein the first vertical plate 416 extends upwards from two opposite side edges of the second flat plate 415 respectively, and the third vertical plate 417 extends outwards from the top of the first vertical plate 416;
the third plate 417 is disposed at the bottom of the first plate 414, and the positioning assembly is provided with a through hole 418 penetrating the first plate 414 and the second plate 415 and opposite to the mounting hole 1040, wherein the diameter of the through hole 418 is smaller than that of the mounting hole 1040.
The third plate 417 and the first plate 414 are fixed by screws or riveted by rivets.
The ignition needle 28 and the thermocouple 29 are provided with positioning platforms 30 at the middle of the side surfaces, and the diameter of each positioning platform 30 is smaller than that of the mounting hole 1040 and larger than that of the through hole 418.
The ignition pins 28 and the lower portions of the thermocouples 29 are inserted downward into the corresponding through holes 418, the positioning blocks 30 are disposed against the corresponding first flat plates 414, and the positioning blocks 30 are disposed in the corresponding mounting holes 1040 and do not protrude from the mounting holes 1040.
Further, a fixing bracket 500 is arranged at the bottom of the annular bottom support 7;
the fixing bracket 500 comprises a fourth flat plate 501, a second vertical plate 502 and a fifth flat plate 503, wherein the second vertical plate 502 extends upwards from the left side edge and the right side edge of the fourth flat plate 501 respectively, and the fifth flat plate 503 extends inwards from the top of the second vertical plate 502;
the fifth flat plate 503 is arranged at the bottom of the annular bottom support 7, the outer ring injection pipe 101 and the inner injection pipe 102 are located between the second vertical plates 502 on the left and right sides of the fourth flat plate 501, and the fourth flat plate 501 is located below the outer ring injection pipe 101 and the inner injection pipe 102.
The fourth plate 501 is fixed on the bottom case of the stove by screws.
The fixing bracket 500 has a simple structure and low processing cost.
Further, a fixing plate 23 for connecting the outer ring injection pipe 101 and the inner injection pipe 102 is arranged between the two pipes;
the fixing piece 23 is located at the rear of the fixing bracket 500.
The fixing piece 23 is in a U shape, two ends of the fixing piece 23 are respectively connected with the outer ring injection pipe 101 and the inner injection pipe 102, and the bottom of the fixing piece 23 is fixed on a bottom shell of the stove through screws.
And air door baffles 24 are arranged at the ends, far away from the positioning plate, of the outer ring injection pipe 101 and the inner injection pipe 102.
The air door baffle plate 24 is used for limiting the maximum air inlet amount of primary air, fixing the nozzle and ensuring the coaxiality between the nozzle and the outer ring injection pipe 101 and the inner injection pipe 102, and the nozzle is fixed on the air door baffle plate 24 in a radial interference fit and axial buckling mode.
The outer peripheral outlet pipe 1033, the first plate 414, the bracket, the fixing bracket 500, the fixing piece 23, and the damper flap 24 are made of stainless steel.
Further, the outer ring injection pipe 101 and the inner injection pipe 102 are respectively integrally formed by a stainless steel pipe.
The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but rather that various changes and modifications may be made without departing from the spirit and scope of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (9)
1. A stainless steel furnace head structure with an outer ring and multiple air passages is characterized by comprising an outer ring injection pipe (101), an inner injection pipe (102) and an outer ring gas mixing cover (103), wherein the outer ring injection pipe, the inner injection pipe and the outer ring gas mixing cover are all made of stainless steel;
a secondary mixing cavity (1031) for mixing air and fuel gas is arranged in the outer ring gas mixing cover (103);
an outer air inlet hole (1032) is formed in the bottom of the outer ring air mixing cover (103), a plurality of outer ring air outlet pipes (1033) which are distributed at intervals are arranged on the upper portion of the outer ring air mixing cover (103), and the outer air inlet hole (1032) and the outer ring air outlet pipes (1033) are respectively communicated with the secondary mixing chamber (1031);
one end of the outer ring injection pipe (101) is communicated with an outer air inlet hole (1032), and one end of the inner injection pipe (102) penetrates out of the outer ring air mixing cover (103) upwards and is not communicated with the secondary mixing chamber (1031).
2. The stainless steel furnace head structure with outer ring and multiple gas flues as recited in claim 1, wherein the number of the outer ring gas outlet pipes (1033) is four and is uniformly distributed at the upper part of the outer ring gas mixing hood (103) along the circumferential direction.
3. The stainless steel furnace head structure with outer ring and multiple gas flues of claim 1, wherein the outer ring gas mixing hood (103) comprises a ring-shaped bottom support (1034), a ring-shaped inner surrounding plate (1035) which is connected with the inner side edge of the ring-shaped bottom support (1034) and extends upwards, a ring-shaped outer surrounding plate (1036) which is connected with the outer side edge of the ring-shaped bottom support (1034) and extends upwards, and an upper cover plate (1037) which is arranged on the ring-shaped inner surrounding plate (1035) and the ring-shaped outer surrounding plate (1036);
a secondary mixing chamber (1031) is defined among the annular bottom support (1034), the annular inner surrounding plate (1035), the annular outer surrounding plate (1036) and the upper cover plate (1037);
the outer air inlet hole (1032) is arranged on the annular bottom support (1034), the outer annular air outlet pipe (1033) is arranged on the upper cover plate (1037), and one end of the inner injection pipe (102) extends into the center of the bottom of the annular bottom support (1034) and upwards penetrates out of the upper cover plate (1037).
4. The stainless steel furnace head structure with the outer ring and the multiple air flues as recited in claim 3, wherein the upper surface of the upper cover plate (1037) is provided with an annular boss (1038) which is formed by stamping and corresponds to the inner jet pipe (102) and the outer ring air outlet pipe (1033), and the inner jet pipe (102) and the outer ring air outlet pipe (1033) penetrate out of the corresponding annular boss (1038) upwards.
5. The stainless steel furnace head structure with the outer ring and the plurality of air channels as claimed in claim 4, wherein the bottom of the outer ring air outlet pipe (1033) is provided with an annular skirt (1039), the diameter of the annular skirt (1039) is gradually increased from top to bottom, and the annular skirt (1039) abuts against the bottom surface of the upper cover plate (1037).
6. The stainless steel furnace head structure with the outer ring and the plurality of air channels as claimed in claim 3, wherein the upper cover plate (1037) is provided with mounting holes (1040) for mounting ignition needles (28) and thermocouples (29);
the mounting hole (1040) is positioned on the inner side of the annular inner surrounding plate (1035), and a positioning assembly is arranged at the bottom of the mounting hole (1040);
the positioning assembly comprises a first flat plate (414) arranged at the bottom of the upper cover plate (1037) and a bracket arranged at the bottom of the first flat plate (414);
the bracket comprises a second flat plate (415), a first vertical plate (416) and a third flat plate (417), wherein the first vertical plate (416) extends upwards from two opposite side edges of the second flat plate (415) respectively, and the third flat plate (417) extends outwards from the top of the first vertical plate (416);
the third flat plate (417) is arranged at the bottom of the first flat plate (414), a through hole (418) which penetrates through the first flat plate (414) and the second flat plate (415) and is opposite to the mounting hole (1040) is arranged on the positioning assembly, and the diameter of the through hole (418) is smaller than that of the mounting hole (1040).
7. The stainless steel furnace head structure with outer ring and multiple air channels of claim 3, wherein the bottom of the ring-shaped bottom support (1034) is provided with a fixed bracket (500);
the fixing support (500) comprises a fourth flat plate (501), a second vertical plate (502) and a fifth flat plate (503), wherein the second vertical plate (502) extends upwards from the edges of the left side and the right side of the fourth flat plate (501) respectively, and the fifth flat plate (503) extends inwards from the top of the second vertical plate (502);
the fifth flat plate (503) is arranged at the bottom of the annular bottom support (1034), the outer ring injection pipe (101) and the inner injection pipe (102) are located between the second vertical plates (502) on the left side and the right side of the fourth flat plate (501), and the fourth flat plate (501) is located below the outer ring injection pipe (101) and the inner injection pipe (102).
8. The stainless steel furnace head structure with the outer ring and the plurality of air passages as claimed in claim 1, wherein a fixing plate (23) for connecting the outer ring injection pipe (101) and the inner injection pipe (102) is arranged between the two;
and air door baffles (24) are arranged at the ends, far away from the positioning plate, of the outer ring injection pipe (101) and the inner injection pipe (102).
9. The stainless steel furnace head structure with the outer ring and the plurality of air passages as claimed in claim 1, wherein the outer ring ejector pipe (101) and the inner ejector pipe (102) are respectively manufactured by integrally forming a stainless steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922456611.8U CN211316169U (en) | 2019-12-30 | 2019-12-30 | Stainless steel furnace head structure with outer ring and multiple air passages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922456611.8U CN211316169U (en) | 2019-12-30 | 2019-12-30 | Stainless steel furnace head structure with outer ring and multiple air passages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211316169U true CN211316169U (en) | 2020-08-21 |
Family
ID=72079389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922456611.8U Expired - Fee Related CN211316169U (en) | 2019-12-30 | 2019-12-30 | Stainless steel furnace head structure with outer ring and multiple air passages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211316169U (en) |
-
2019
- 2019-12-30 CN CN201922456611.8U patent/CN211316169U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 |