CN213179491U - Movable dust collection hood for electric furnace - Google Patents
Movable dust collection hood for electric furnace Download PDFInfo
- Publication number
- CN213179491U CN213179491U CN202021889625.5U CN202021889625U CN213179491U CN 213179491 U CN213179491 U CN 213179491U CN 202021889625 U CN202021889625 U CN 202021889625U CN 213179491 U CN213179491 U CN 213179491U
- Authority
- CN
- China
- Prior art keywords
- dust
- dust collecting
- pneumatic butterfly
- cover
- butterfly valve
- 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.)
- Active
Links
- 239000000428 dust Substances 0.000 title claims abstract description 179
- 230000001939 inductive effect Effects 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 9
- 235000014347 soups Nutrition 0.000 description 9
- 238000007599 discharging Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
A mobile dust cage for an electric furnace comprising: the dust collector, a track for the movement of the dust hood, the dust hood arranged on the track and a motor for driving the dust hood to move on the track; wherein the dust collector and the dust hood are communicated through a dust collecting pipeline; the vertical pipe in the dust collecting pipes is communicated with the cover, and the horizontal pipe is respectively communicated with the first dust collecting pipe and the second dust collecting pipe; the dust cage is provided with: the device comprises a cover, a three-way pipeline arranged on the cover, a pneumatic butterfly valve, a first inductive switch and a roller; wherein, the first inductive switch controls the pneumatic butterfly valve, and the roller causes the dust-collecting cover to roll in the track; the motor is fixed on the dust collecting cover, and when the remote controller is operated, the motor rotates to drive the roller to rotate, so that the dust collecting cover moves on the track. The utility model can collect the generated smoke dust, thereby improving the production environment; and moreover, a large amount of smoke and dust dissipated in a workshop can be quickly discharged, so that the serious pollution to the production environment is avoided.
Description
Technical Field
The utility model belongs to the machinery casting field especially relates to a portable dust cage for electric stove.
Background
In a casting production workshop, one production line is provided with two electric furnaces for alternately melting materials and discharging soup, wherein one electric furnace is used for discharging soup, and the other electric furnace is used for melting materials; when the material is normalized, the generated smoke is very little, and a large amount of smoke is generated under the following three conditions:
1. when the molten metal in the furnace has unqualified components, adding raw materials into the molten metal for tempering;
2. in the pouring stage, the metal liquid with qualified components is poured into a pouring ladle;
3. and after the pouring is finished, adding a first barrel of raw materials into the empty electric furnace.
In order to solve the above problems, the existing device is that an air duct is arranged at the top of the electric furnace, the air duct is connected with a dust collector, then a furnace cover is covered, and at the moment, the dust collector sucks the smoke dust generated in the furnace into the dust collector through the air duct. However, when the first barrel of raw material is added into the empty furnace and the molten metal is poured into the pouring ladle from the electric furnace, the furnace cover of the electric furnace is opened, so the generated smoke dust cannot enter the dust collector through the air duct, and a large amount of smoke dust can escape into the workshop and cannot be discharged due to the fact that the casting workshop is a closed space, and serious pollution is caused to the production environment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a portable dust cage for electric stove to solve in the operation such as the electric stove is reinforced, the unqualified quenching and tempering of molten metal composition is reinforced and go out the hot water, the smoke and dust that its produced is difficult to the technical problem who is collected.
In order to achieve the purpose, the utility model discloses a concrete technical scheme as follows that is used for portable dust cage of electric stove:
a mobile dust cage for an electric furnace comprising: the dust collector, a track for the movement of the dust collection cover, the dust collection cover arranged on the track and a motor for driving the dust collection cover to move left and right on the track; wherein,
the dust collector and the dust hood are communicated through a dust collecting pipeline; the vertical pipe in the dust collecting pipes is communicated with the cover, the left side of the horizontal pipe is communicated with the first dust collecting pipe, and the right side of the horizontal pipe is communicated with the second dust collecting pipe;
the dust cage is provided with: the device comprises a cover, a three-way pipe arranged on the cover, a plurality of pneumatic butterfly valves arranged on the three-way pipe, a plurality of first inductive switches and rollers; wherein, a plurality of first inductive switches are arranged on the wall of the cover and used for controlling the pneumatic butterfly valve, a plurality of rollers are arranged at the lower end of the cover and enable the dust-collecting cover to roll in the track;
the motor is fixed on the dust collection cover, the roller and the motor shaft are fixed together, and when the remote controller is operated, the motor rotates to drive the roller to rotate, so that the dust collection cover moves on the track.
Further, the three-way pipeline is T-shaped and is arranged at the upper end of the cover.
Further, the cover is a frustum-shaped structure which is composed of a frame and an iron plate, wherein the frame is formed by vertically fixing a plurality of square pipes, the iron plate covers the frame, the upper part of the frustum-shaped structure is narrow, and the lower part of the frustum-shaped structure is wide.
Further, only the upper part 1/3 of the vertical surface of the cover close to the electric stove side is of a frame structure.
Further, the track includes: a plurality of upright posts, a plurality of support columns and a plurality of cross beams; wherein, a plurality of upright posts are arranged in a matrix in two rows and three columns; the plurality of support columns are respectively fixed on the two upright columns in the same column; the middle parts of the support columns are connected with two cross beams, the cross beams are arranged at intervals with set distances, the cross beams are I-shaped steel, and the wear-resistant strips are fixed on the I-shaped steel.
Further, the plurality of pneumatic butterfly valves are a fourth pneumatic butterfly valve and a fifth pneumatic butterfly valve, wherein the fourth pneumatic butterfly valve is fixed at the left end of the three-way pipeline; and the fifth pneumatic butterfly valve is fixed at the right end of the three-way pipeline.
Furthermore, the plurality of first inductive switches are respectively fixed on the left side of a fourth pneumatic butterfly valve and the right side of a fifth pneumatic butterfly valve on the three-way pipeline.
Further, the dust collection duct comprises: the dust collecting device comprises a main dust collecting pipeline, a first dust collecting pipeline, a second dust collecting pipeline and a roof dust collecting pipeline; wherein, a first pneumatic butterfly valve is arranged between the interface of the main dust collecting pipeline and the second dust collecting pipeline and the plurality of roof dust collecting pipelines; the first dust collecting pipeline and the second dust collecting pipeline are respectively used for connecting the main dust collecting pipeline and the dust collecting cover;
furthermore, a second pneumatic butterfly valve and a third pneumatic butterfly valve are arranged at the connecting ends of the first dust collecting pipeline and the second dust collecting pipeline and the dust collecting cover, and a second inductive switch is respectively arranged on the right side of the second pneumatic butterfly valve and the left side of the third pneumatic butterfly valve.
The utility model discloses a portable dust cage for electric stove has following advantage:
the utility model can collect the generated smoke dust during the operations of feeding in the electric furnace, unqualified tempering of the metal liquid components, discharging soup and the like, thereby greatly improving the production environment; and moreover, a large amount of smoke and dust dissipated in a workshop can be quickly discharged, so that the serious pollution to the production environment is avoided.
Drawings
FIG. 1 is a schematic top view of the overall external workshop structure of the present invention;
FIG. 2 is a schematic top view of the local off-plant structure of the present invention;
FIG. 3 is a schematic front view of the dust cage of the present invention;
FIG. 4 is a schematic side view of the dust cage of the present invention;
fig. 5 is a partially enlarged view of a in fig. 4.
The notation in the figure is:
1-a dust collector; 2-a first dust collecting conduit; 3-pouring a ladle; 4-a support column; 5-a first electric furnace; 6-a second pneumatic butterfly valve; 7-orbit; 8-a primary dust collection conduit; 9-a casting machine; 10-a first pneumatic butterfly valve; 11-a second dust collecting conduit; 12-a third pneumatic butterfly valve; 13-a second electric furnace; 14-a roof first dust collection duct; 15-a roof second dust collecting duct; 16-a roof top third dust collection conduit; 17-a roof fourth dust collecting duct; 18-a fourth pneumatic butterfly valve; 19-a fifth pneumatic butterfly valve; 20-a motor; 21-dust collecting cover; 22-square tube; 23-a tee pipeline; 24-a roller; 25-column.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following description will be made in detail with reference to the accompanying drawings.
As shown in fig. 1-5, the present invention includes: a dust collector 1, a rail 7 for moving a dust collection cover 21, the dust collection cover 21 arranged on the rail 7, and a motor 20 for driving the dust collection cover 21 to move left and right on the rail 7; wherein, the dust collector 1 is communicated with the dust collecting cover 21 through a dust collecting pipeline;
as shown in fig. 3 to 5, the dust collection cover 21 includes: the device comprises a cover, a three-way pipe 23 arranged on the cover, a plurality of pneumatic butterfly valves (a fourth pneumatic butterfly valve 18 and a fifth pneumatic butterfly valve 19 in the embodiment) arranged on the three-way pipe 23, a plurality of first inductive switches and a roller 24; wherein, the three-way pipeline 23 is T-shaped and is arranged at the upper end of the cover; a plurality of pneumatic butterfly valves (a fourth pneumatic butterfly valve 18 and a fifth pneumatic butterfly valve 19 in the embodiment) are arranged on the three-way pipeline 23; a plurality of first inductive switches are mounted on the wall of the housing for controlling the pneumatic butterfly valve, and a plurality of rollers 24 are mounted on the lower end of the housing, the rollers 24 allowing the dust cage 21 to roll in the rail 7.
The cover is a frustum-shaped structure which is composed of a frame and an iron plate, wherein the frame is formed by mutually vertically fixing a plurality of square tubes 22, the iron plate covers the frame, the upper part of the frustum-shaped structure is narrow, and the lower part of the frustum-shaped structure is wide; and only the upper part 1/3 of the vertical surface of the cover close to the electric stove side is a frame structure.
The vertical pipe of the dust collecting pipes is communicated with the cover, the left side of the horizontal pipe is communicated with the first dust collecting pipe 2, and the right side of the horizontal pipe is communicated with the second dust collecting pipe 11;
the fourth pneumatic butterfly valve 18 is fixed at the left end of the tee pipeline 23; a fifth pneumatic butterfly valve 19 is fixed at the right end of the tee pipe 23.
The first inductive switches are used for controlling the opening and closing of the pneumatic butterfly valve, and the first inductive switches are respectively fixed on the left side of the fourth pneumatic butterfly valve 18 and the right side of the fifth pneumatic butterfly valve 19 on the three-way pipeline 23.
As shown in fig. 1, the rail 7 for moving the dust collection cover includes: a plurality of columns 25 (six in this embodiment), a plurality of support columns 4 (three in this embodiment), and a plurality of beams (two in this embodiment); wherein, six upright posts 25 are arranged in a matrix in two rows and three columns; the three support columns 4 are respectively fixed on the two upright columns 25 in the same column in a welding mode; the middle parts of the three support columns 4 are connected with two cross beams in a welding mode, the cross beams are arranged at intervals with set distances, the cross beams are I-shaped steel, and the wear-resistant strips are fixed on the I-shaped steel.
As shown in fig. 4 and 5, the motor 20 for driving the cover to move is fixed on the dust-collecting cover 21, and the roller 24 and the motor shaft are fixed together, when the remote controller is operated, the motor 20 rotates to drive the roller 24 to rotate, thereby moving the dust-collecting cover 21 on the track 7.
As shown in fig. 1 and 2: the dust collecting duct communicating between the dust collector 1 and the dust collection cover 21 includes: a main dust collecting pipe 8, a first dust collecting pipe 2, a second dust collecting pipe 11 and a roof dust collecting pipe; wherein, the diameter of the main dust collecting pipeline 8 is the largest, and the diameters of other dust collecting pipelines are smaller and the same; a first pneumatic butterfly valve 10 is arranged between the interface of the main dust collecting pipeline 8 and the second dust collecting pipeline 11 and the roof dust collecting pipeline; the first dust collecting pipe 2 and the second dust collecting pipe 11 are respectively used for connecting the main dust collecting pipe 8 and the dust collecting cover 21; a second pneumatic butterfly valve 6 and a third pneumatic butterfly valve 12 are arranged at the connecting ends of the first dust collecting pipeline 2 and the second dust collecting pipeline 11 and the dust collecting cover 21, and a second inductive switch is respectively arranged at the right side of the second pneumatic butterfly valve 6 and the left side of the third pneumatic butterfly valve 12;
the roof dust collecting pipeline comprises: a roof first dust collecting duct 14, a roof second dust collecting duct 15, a roof third dust collecting duct 16, and a roof fourth dust collecting duct 17.
The principle of the utility model is as follows:
in normal production, the melting area is that two electric furnaces melt the material alternately and produce soup, namely: when the first electric furnace 5 discharges soup, the second electric furnace 13 melts the materials; when the first electric furnace 5 melts the materials, the second electric furnace 13 discharges soup. The utility model discloses an aim at collects reinforced, the smoke and dust that produces when quenching and tempering and play hot water, so, when first electric stove 5 goes out the hot water, casting machine 9 removes pouring ladle 3 before first electric stove 5, dust cage 21 removes the top to first electric stove 5, and reachs the assigned position, at this moment, inductive switch on the tee bend pipeline on first dust collecting pipeline 2 and the dust cage 21 is opened, second pneumatic butterfly valve 6 and fourth pneumatic butterfly valve 18 are opened, all the other pneumatic butterfly valves all are in the closed condition, dust collector 1, main dust collecting pipeline 8, first dust collecting pipeline 2 and dust cage 21 intercommunication, at this moment, dust collector 1 can be with first electric stove 5 quenching and tempering, go out the hot water process and add first barrel material after, its produced smoke and dust is collected. After the first electric furnace 5 finishes discharging soup and the first barrel of raw materials is added into the empty furnace, the dust hood 21 is separated from the first dust collecting pipeline 2 by operating the remote controller and then moves to the second electric furnace 13. In the moving process, only the first pneumatic butterfly valve 10 is opened, and the rest pneumatic butterfly valves are all in a closed state; the dust collector 1, the main dust collecting duct 8 and the roof dust collecting duct are connected to collect the dust scattered on the roof by escaping from the dust collecting cover 21. When the dust hood 21 moves above the second electric furnace 13 and reaches a designated position, the three-way pipe on the dust hood 21 and the inductive switch on the second dust collecting pipe 11 are opened, the third pneumatic butterfly valve 12 and the fifth pneumatic butterfly valve 19 are opened, the rest pneumatic butterfly valves are all in a closed state, the dust collector 1, the main dust collecting pipe 8, the second dust collecting pipe 11 and the dust hood 21 are communicated, and at the moment, the dust collector 1 collects smoke dust generated in the second electric furnace 13 in the processes of tempering, soup discharging and adding the first barrel material. After the second electric furnace 13 finishes discharging soup and the first barrel of raw materials is added into the empty furnace, the remote controller is operated, and the dust hood 21 is separated from the second dust collecting pipeline 11 and then moves to the first electric furnace 5. The above steps are repeated to form the movable dust collecting hood for the electric furnace.
The dust collector, the dust collecting pipeline, the pouring ladle, the electric furnace, the pneumatic butterfly valve, the motor, the three-way pipeline and the roller are in the prior art, and the unexplained technology is in the prior art, so that the details are not repeated.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (9)
1. A mobile dust cage for an electric furnace, comprising: the dust collector, a track for the movement of the dust collection cover, the dust collection cover arranged on the track and a motor for driving the dust collection cover to move left and right on the track; wherein,
the dust collector and the dust hood are communicated through a dust collecting pipeline; the vertical pipe in the dust collecting pipes is communicated with the cover, the left side of the horizontal pipe is communicated with the first dust collecting pipe, and the right side of the horizontal pipe is communicated with the second dust collecting pipe;
the dust cage is provided with: the device comprises a cover, a three-way pipe arranged on the cover, a plurality of pneumatic butterfly valves arranged on the three-way pipe, a plurality of first inductive switches and rollers; wherein, a plurality of first inductive switches are arranged on the wall of the cover and used for controlling the pneumatic butterfly valve, a plurality of rollers are arranged at the lower end of the cover and enable the dust-collecting cover to roll in the track;
the motor is fixed on the dust collection cover, the roller and the motor shaft are fixed together, and when the remote controller is operated, the motor rotates to drive the roller to rotate, so that the dust collection cover moves on the track.
2. The mobile dust cage for electric furnace as claimed in claim 1, wherein the tee pipe is T-shaped and installed at an upper end of the cage.
3. The mobile dust cage for electric furnace as claimed in claim 1, wherein the cage is a frustum-shaped structure having a narrow upper part and a wide lower part, which is composed of a frame in which a plurality of square pipes are vertically fixed to each other and an iron plate covering the frame, wherein the lower part of the cage is opened.
4. The portable dust cage for electric furnaces as claimed in claim 1 or 3, wherein only an upper portion 1/3 of a vertical surface of the cage near the electric furnace side is a frame structure.
5. The mobile dust cage for electric furnace as claimed in claim 1, wherein the rail comprises: a plurality of upright posts, a plurality of support columns and a plurality of cross beams; wherein, a plurality of upright posts are arranged in a matrix in two rows and three columns; the plurality of support columns are respectively fixed on the two upright columns in the same column; the middle parts of the support columns are connected with two cross beams, the cross beams are arranged at intervals with set distances, the cross beams are I-shaped steel, and the wear-resistant strips are fixed on the I-shaped steel.
6. The mobile dust cage for electric furnace as claimed in claim 1, wherein the plurality of pneumatic butterfly valves are a fourth pneumatic butterfly valve and a fifth pneumatic butterfly valve, wherein the fourth pneumatic butterfly valve is fixed at the left end of the tee pipe; and the fifth pneumatic butterfly valve is fixed at the right end of the three-way pipeline.
7. The mobile dust cage for electric furnace as claimed in claim 1, wherein the first sensing switches are fixed to the left side of a fourth pneumatic butterfly valve and the right side of a fifth pneumatic butterfly valve on the tee pipe, respectively.
8. The mobile dust cage for electric furnace as claimed in claim 1, wherein the dust collecting duct comprises: the dust collecting device comprises a main dust collecting pipeline, a first dust collecting pipeline, a second dust collecting pipeline and a roof dust collecting pipeline; wherein, a first pneumatic butterfly valve is arranged between the interface of the main dust collecting pipeline and the second dust collecting pipeline and the plurality of roof dust collecting pipelines; the first dust collecting pipe and the second dust collecting pipe are respectively used for connecting the main dust collecting pipe and the dust collecting cover.
9. The movable dust hood for electric furnace as set forth in claim 1 or 8, wherein the first dust collecting pipe and the second dust collecting pipe are provided with a second pneumatic butterfly valve and a third pneumatic butterfly valve at their ends connected to the dust hood, and a second sensor switch is provided on each of right side of the second pneumatic butterfly valve and left side of the third pneumatic butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021889625.5U CN213179491U (en) | 2020-09-02 | 2020-09-02 | Movable dust collection hood for electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021889625.5U CN213179491U (en) | 2020-09-02 | 2020-09-02 | Movable dust collection hood for electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213179491U true CN213179491U (en) | 2021-05-11 |
Family
ID=75770501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021889625.5U Active CN213179491U (en) | 2020-09-02 | 2020-09-02 | Movable dust collection hood for electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213179491U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115502163A (en) * | 2022-08-23 | 2022-12-23 | 无锡市西漳环保设备有限公司 | Pouring cooling trapping device and trapping method |
-
2020
- 2020-09-02 CN CN202021889625.5U patent/CN213179491U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115502163A (en) * | 2022-08-23 | 2022-12-23 | 无锡市西漳环保设备有限公司 | Pouring cooling trapping device and trapping method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201166520Y (en) | Intermediate frequency furnace flue gas trapping device | |
| CN213179491U (en) | Movable dust collection hood for electric furnace | |
| CN104815830A (en) | Casting area moving type dust removing device for continuous casting machine | |
| CN102027305B (en) | Furnace system | |
| CN106001502A (en) | Flat-top low-pressure casting machine | |
| CN204700024U (en) | The portable cleaner of conticaster casting area | |
| JP3528437B2 (en) | Dust collector for dismantling and repairing ladle refractories | |
| CN206289270U (en) | Converter secondary flue gas capturing device | |
| CN211170746U (en) | Overhead shielding door of electric furnace | |
| CN204923917U (en) | Portable dust collector in line frequency furnace stokehold | |
| CN204589218U (en) | A kind of movable dust removal cover of blast furnace iron notch | |
| CN210647665U (en) | Cross-flow tuyere sleeve reverse mould environment-friendly dust removal device | |
| CN111074019B (en) | Liquid slag dry-type granulating and waste heat recovering device with slag wool shearing and crushing functions and operation method thereof | |
| CN207850028U (en) | The anti-water collecting device of rotary kiln end kiln tail seal closure | |
| EP3421619B1 (en) | Aspiration cover of converter dust cap | |
| CN216758161U (en) | Closed dust removal room in molten metal pouring production line | |
| CN205669036U (en) | Blast furnace iron notch slidingtype extractor fan | |
| CN221184133U (en) | Ladle hot repair dust removal flue gas trapping device | |
| CN221094182U (en) | Collecting device for wind-quenched steel slag forming dust fall | |
| CN219547005U (en) | Trapping cover structure for refining furnace | |
| CN218380527U (en) | Novel double-station refining furnace trapping cover | |
| CN210132045U (en) | Remove split formula ferrosilicon pouring flue gas waste heat recovery device | |
| CN205425864U (en) | A jar flue gas collecting cover is rolled over to portable molten iron | |
| CN215355253U (en) | Ladle hot repair flue gas entrapment equipment | |
| CN211012518U (en) | Stokehole smoke and dust entrapment cover of AOD stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |