CN109371196B - Compact slag scraper - Google Patents
Compact slag scraper Download PDFInfo
- Publication number
- CN109371196B CN109371196B CN201811581596.3A CN201811581596A CN109371196B CN 109371196 B CN109371196 B CN 109371196B CN 201811581596 A CN201811581596 A CN 201811581596A CN 109371196 B CN109371196 B CN 109371196B
- Authority
- CN
- China
- Prior art keywords
- oxygen lance
- scraper
- slag
- buffer
- scraping knife
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 73
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 138
- 239000001301 oxygen Substances 0.000 claims abstract description 138
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 138
- 239000000872 buffer Substances 0.000 claims abstract description 69
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000007790 scraping Methods 0.000 claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 11
- 239000007853 buffer solution Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention provides a compact slag scraper which comprises an oxygen lance buffer support, an oxygen lance buffer, two slag scraping knife rest, two slag scraping knife heads and two air cylinders, wherein one ends of the two slag scraping knife rest are symmetrically hinged and fixed on the side face of the oxygen lance buffer support, the two scraper heads are respectively positioned on two sides of an oxygen lance and fixed on the other ends of the two slag scraping knife rest, the air cylinders are hinged and fixed on an upright post, the movable ends of the air cylinders are hinged with the slag scraping knife rest through connecting rods, and the central line of the oxygen lance buffer is positioned on the outer side of the central line of an oxygen lance fixed guide rail. According to the invention, by designing the installation position of the oxygen lance buffer, the center line of the oxygen lance buffer is offset from the center line of the oxygen lance fixed guide rail, so that a certain space is reserved for the installation of the oxygen lance buffer base, the oxygen lance hole nitrogen sealing device and the oxygen lance opening cooling pipe, the whole occupied area of the slag scraper is reduced, the space is effectively saved, and the problems that the slag scraper cannot be arranged in a factory building with limited space in the prior art and the old factory building without reserved installation space of the slag scraper is transformed are effectively solved.
Description
Technical Field
The invention belongs to the technical field of ferrous metallurgical equipment, and particularly relates to a compact slag scraper.
Background
At present, due to the refined investment, the factory building arrangement of a steelmaking workshop is more and more compact, and particularly, the converter high-rise frame is more and more compact. The existing converter span slag scraper adopts a transmission structure, and the center line of the buffer of the slag scraper is overlapped with the center line of the fixed guide rail of the oxygen lance, so that the occupied area of the slag scraper is large, and the slag scraper cannot be arranged under the limit of a factory building with limited space. In addition, as the slag scraper is additionally arranged in the converter oxygen lance system of the old factory building, the space for installing the slag scraper is not reserved, and the transformation difficulty is high.
Therefore, a slag scraper with a compact structure is required to be designed, and the purposes of small occupied area and space saving are achieved under the condition that the nitrogen sealing device of the oxygen lance hole is not interfered and the cooling pipe of the oxygen lance mouth is not interfered.
Disclosure of Invention
The invention aims to solve the problems that the existing slag scraper occupies a large area and is not suitable for the arrangement of a factory building with limited space and the transformation of an old factory building.
The invention provides a compact slag scraper which comprises an oxygen lance buffer support, an oxygen lance buffer, two slag scraping knife rest, two slag scraping knife heads and two air cylinders, wherein the oxygen lance buffer is arranged on the oxygen lance buffer support, one end of each slag scraping knife rest is symmetrically hinged and fixed on the side face of the oxygen lance buffer support, the two scraper heads are respectively positioned on two sides of an oxygen lance and fixed on the other end of each slag scraping knife rest, the cylinder bodies of the two air cylinders are hinged and fixed on an upright post, the movable ends of the two air cylinders are respectively hinged with the two slag scraping knife rest through connecting rods, and the center line of the oxygen lance buffer is positioned on the outer side of the center line of an oxygen lance fixed guide rail.
Furthermore, a U-shaped notch is formed in the bottom of the oxygen lance buffer support corresponding to the oxygen lance hole nitrogen sealing device and the oxygen lance opening cooling pipe.
Further, the side wall and the bottom plate of the U-shaped notch at the bottom of the oxygen lance buffer support are provided with reinforcing ribs.
Further, the distance between the center line of the oxygen lance buffer and the center line of the oxygen lance fixed guide rail is 20-50 mm.
Further, the scraper head is formed by sequentially connecting three sections of scraper blades, and the scraper blades at the tail end of the scraper head are not closed.
Further, the distance between the edge of the scraping blade and the oxygen lance without slag is 7.5mm.
Further, the opening degree of the two scraper heads is larger than the diameter of the nitrogen sealing opening of the oxygen lance.
Further, a plurality of mounting hand holes for mounting oxygen lance buffer bolts are formed in the side plates of the oxygen lance buffer support.
Further, the upright posts are welded and fixed on the structural beams of the factory building.
Compared with the prior art, the invention has the beneficial effects that:
according to the compact slag scraper provided by the invention, the installation position of the oxygen lance buffer is designed, so that the center line of the oxygen lance buffer and the center line of the oxygen lance fixed guide rail are eccentrically arranged, a certain space is reserved for the installation of the oxygen lance buffer base, the oxygen lance hole nitrogen sealing device and the oxygen lance hole cooling pipe, the whole occupied area of the slag scraper is reduced, the space is effectively saved, and the labor intensity of maintenance operators is reduced.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a compact slag scraper of the present invention;
FIG. 2 is a top view of the compact slag scraper of the present invention;
FIG. 3 is a schematic cross-sectional view of A-A of FIG. 1;
fig. 4 is a schematic cross-sectional view of B-B of fig. 1.
Reference numerals illustrate: 1. a column; 2. a cylinder; 3. a connecting rod; 4. an oxygen lance buffer support; 5. an oxygen lance buffer; 6. a slag scraping knife rest; 7. scraping a cutter head; 8. an oxygen lance; 9. a structural beam; 10. a U-shaped notch; 11. an oxygen gun port cooling tube; 12. an oxygen lance hole nitrogen sealing device; 13. an oxygen lance fixing guide rail; 14. and installing a hand hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1, 2 and 4, the embodiment provides a compact slag scraper, which comprises an oxygen lance buffer support 4, an oxygen lance buffer 5 arranged on the oxygen lance buffer support 4, two slag scraping knife rest 6, two scraper heads 7 and two air cylinders 2, wherein one ends of the two slag scraping knife rest 6 are symmetrically hinged and fixed on the side surface of the oxygen lance buffer support 4, the two scraper heads 7 are respectively positioned on two sides of an oxygen lance 8 and fixed on the other ends of the two slag scraping knife rest 6, the cylinder bodies of the two air cylinders 2 are hinged and fixed on a stand column 1, the movable ends of the two air cylinders 2 are respectively hinged with the two slag scraping knife rest 6 through a connecting rod 3, so that the stand column 1, the air cylinders 2, the slag scraping knife rest 6 and the oxygen lance buffer support 4 form a connecting rod mechanism, and the two slag scraping knife rest 6 can be opened and closed through telescopic driving of the air cylinders 2; the whole slag scraper is fixed at the nitrogen sealing position of the oxygen lance, the center line of the oxygen lance buffer 5 is positioned at the outer side of the center line of the oxygen lance fixed guide rail 13, namely, the center line of the oxygen lance buffer 5 is offset towards the outer side of the center line of the oxygen lance fixed guide rail 13 by a certain distance, so that a certain installation space can be provided for the oxygen lance buffer support 4, the nitrogen sealing device 12 of the oxygen lance hole and the cooling tube 11 of the oxygen lance hole, the problem that the center line of the existing slag scraper buffer coincides with the center line of the oxygen lance fixed guide rail and is interfered between the oxygen lance buffer support 4, the nitrogen sealing device 12 of the oxygen lance hole and the cooling tube 11 of the oxygen lance hole in a limited space factory building is effectively avoided, the space can be effectively saved, and the slag scraper is applicable to the transformation of the old factory building without reserving the space for installing the slag scraper.
Further, after the center line of the oxygen lance buffer 5 deviates towards the outside of the center line of the oxygen lance fixing rail 13, when the oxygen lance buffer support 4 still interferes with the oxygen lance hole nitrogen sealing device 12 and the oxygen lance opening cooling pipe 11, as shown in fig. 3 and 4, a U-shaped notch 10 can be formed at the position corresponding to the oxygen lance hole nitrogen sealing device 12 and the oxygen lance opening cooling pipe 11 on the bottom of the oxygen lance buffer support 4, so that when the oxygen lance hole nitrogen sealing device 12 and the oxygen lance opening cooling pipe 11 are installed, part of the oxygen lance buffer support 4 can be placed in the U-shaped notch 10 at the bottom of the oxygen lance buffer support 4, and the occupation space for installing the slag scraper is further saved while the normal operation of the oxygen lance hole nitrogen sealing device 12 and the oxygen lance opening cooling pipe 11 is not affected. In order to ensure the strength of the oxygen lance buffer support 4 after the U-shaped notch 10 is formed in the bottom of the oxygen lance buffer support 4, reinforcing ribs are arranged on the side wall and the bottom plate of the U-shaped notch 10 in the bottom of the oxygen lance buffer support 4, the strength of the U-shaped notch 10 in the bottom of the oxygen lance buffer support 4 is reinforced through the arrangement of the reinforcing ribs, the supporting effect of the oxygen lance buffer support 4 on the oxygen lance buffer 5 is ensured, and the service life of the slag scraper is prolonged.
Because the center line of the oxygen lance buffer 5 deviates towards the outer side of the center line of the oxygen lance fixed guide rail 13, when the oxygen lance lifting trolley accidentally drops to impact the oxygen lance buffer 5, the oxygen lance buffer 5 is not just opposite to the impact energy absorption, and in order to reduce the influence of the oxygen lance buffer 5 not just opposite to the impact energy absorption, the interval between the center line of the oxygen lance buffer 5 and the center line of the oxygen lance fixed guide rail 13 is optimally controlled to be 20-50 mm. If the interval between the center line of the oxygen lance buffer 5 and the center line of the oxygen lance fixed guide rail 13 is too small, the oxygen lance buffer 5 interferes with the normal operation of the oxygen lance hole nitrogen sealing device 12 and the oxygen lance hole cooling pipe 11; if the interval between the center line of the oxygen lance buffer 5 and the center line of the oxygen lance fixed guide rail 13 is too large, the oxygen lance buffer 5 cannot well absorb the impact energy of the unexpected falling of the oxygen lance lifting trolley.
In a refined embodiment, as shown in fig. 2, each scraper head 7 is formed by sequentially connecting three sections of scraper blades, and the scraper blades of the two scraper heads 7 are not closed, so as to avoid interference with the oxygen lance in the process of opening the scraper heads 7. The scraping knife rest 6 is connected with the connecting rod 3 on the air cylinder 2, the air source pushes the air cylinder 2 to push the connecting rod 3, so that the scraper head 7 on the scraping knife rest 6 is driven to a working position, at the moment, the distance between the cutting edge of the scraping blade and the oxygen lance 8 without slag is 7.5mm, if the distance between the scraping blade and the oxygen lance 8 without slag is too far, the scraping slag is not clean, and if the distance between the scraping blade and the oxygen lance 8 without slag is too close, the scraping blade is easy to interfere with the oxygen lance 8. In the ascending process of the oxygen lance 8, the scraping blade on the scraper head 7 props against the scraping slag, when the oxygen lance 8 ascends to scrape the slag, the air cylinder 2 contracts the connecting rod 3 to drive the slag scraping knife rest 6 to move in the direction away from the oxygen lance 8, so that the two scraper heads 7 are opened, the opening of the two scraper heads 7 exceeds the diameter of the oxygen lance nitrogen sealing opening, and the interference of the scraper head 7 to the oxygen lance nitrogen sealing is avoided.
Because the scraping tool bit 7 of the slag scraper is conducted to the fixing piece through the upright post 1 in the opening and closing process, in the optimized mode of the embodiment, the upright post 1 is welded and fixed on the structural beam 9 of the factory building, and the slag scraper is welded on the platform plate, so that the platform plate is prevented from being pulled off when the slag scraper works.
And because after the central line of the oxygen lance buffer 5 deviates towards the outside of the central line of the oxygen lance fixed guide rail 13, the oxygen lance buffer 5 has compact assembly structure, and the oxygen lance buffer bolts close to the side plate of the oxygen lance buffer support 4 have no installation space, further, a plurality of installation hand holes 14 for installing the oxygen lance buffer bolts can be arranged on the side plate of the oxygen lance buffer support 4.
In addition, in order to further reduce the occupied area of the slag scraper, the sweeping area of the air cylinder 2 is minimum on the premise that the slag scraper meets the slag scraping function by adjusting the position and the angle of the air cylinder 2 at the fulcrum of the connecting rod 3 and the fulcrum of the upright post 1 of the slag scraper.
In summary, the compact slag scraper provided by the invention has the advantages that the installation position of the oxygen lance buffer is designed, so that the center line of the oxygen lance buffer and the center line of the oxygen lance fixed guide rail are eccentrically arranged, a certain space is reserved for the installation of the oxygen lance buffer base, the oxygen lance hole nitrogen sealing device and the oxygen lance opening cooling pipe, the whole occupied area of the slag scraper is reduced, the space is effectively saved, and the problems that the slag scraper cannot be arranged in a factory building with limited space in the prior art and the old factory building without reserving the installation space of the slag scraper is effectively solved.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (7)
1. A compact slag scraper, characterized in that: the device comprises an oxygen lance buffer support, an oxygen lance buffer, two slag scraping knife rest, two scraping knife heads and two air cylinders, wherein the oxygen lance buffer, the two slag scraping knife rest, the two scraping knife heads and the two air cylinders are arranged on the oxygen lance buffer support;
a U-shaped notch is formed in the bottom of the oxygen lance buffer support at a position corresponding to the oxygen lance hole nitrogen sealing device and the oxygen lance hole cooling pipe; the distance between the center line of the oxygen lance buffer and the center line of the oxygen lance fixed guide rail is 20-50 mm.
2. The compact slag scraper of claim 1, wherein: reinforcing ribs are arranged on the side wall and the bottom plate of the U-shaped notch at the bottom of the oxygen lance buffer support.
3. The compact slag scraper of claim 1, wherein: the scraper head is formed by sequentially connecting three sections of scraper blades, and the scraper blades at the tail end of the scraper head are not closed.
4. A compact slag scraper as claimed in claim 3, wherein: the distance between the edge of the scraping blade and the oxygen lance without slag is 7.5mm.
5. The compact slag scraper of claim 1, wherein: the opening of the two scraper heads is larger than the diameter of the nitrogen sealing opening of the oxygen lance.
6. The compact slag scraper of claim 1, wherein: the side plate of the oxygen lance buffer support is provided with a plurality of mounting hand holes for mounting oxygen lance buffer bolts.
7. The compact slag scraper of claim 1, wherein: the upright posts are welded and fixed on the structural beams of the factory building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581596.3A CN109371196B (en) | 2018-12-24 | 2018-12-24 | Compact slag scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581596.3A CN109371196B (en) | 2018-12-24 | 2018-12-24 | Compact slag scraper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109371196A CN109371196A (en) | 2019-02-22 |
| CN109371196B true CN109371196B (en) | 2023-11-21 |
Family
ID=65371419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811581596.3A Active CN109371196B (en) | 2018-12-24 | 2018-12-24 | Compact slag scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109371196B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2067259A (en) * | 1980-01-15 | 1981-07-22 | Mckee Minerals & Metals Ltd Da | Gas lance cleaning device |
| CN2888385Y (en) * | 2006-05-09 | 2007-04-11 | 中冶南方工程技术有限公司 | Slag scraper for oxygen gun |
| CN201620174U (en) * | 2010-01-14 | 2010-11-03 | 安徽工业大学 | Y-shaped oxygen lance slag separator |
| CN202081125U (en) * | 2011-05-13 | 2011-12-21 | 沈树光 | Slag scraping device of converter oxygen lance |
| CN203923258U (en) * | 2014-05-30 | 2014-11-05 | 泰州明锋资源再生科技有限公司 | Slag scraper of converter oxygen lance |
| CN204039432U (en) * | 2014-08-29 | 2014-12-24 | 宣化钢铁集团有限责任公司 | A kind of Dreg Scraping Device of Oxygen Lance being convenient to change |
| CN107828934A (en) * | 2017-09-28 | 2018-03-23 | 中冶南方工程技术有限公司 | A kind of Dreg Scraping Device of Oxygen Lance |
| CN209338601U (en) * | 2018-12-24 | 2019-09-03 | 中冶南方工程技术有限公司 | A kind of compact slag scraper |
-
2018
- 2018-12-24 CN CN201811581596.3A patent/CN109371196B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2067259A (en) * | 1980-01-15 | 1981-07-22 | Mckee Minerals & Metals Ltd Da | Gas lance cleaning device |
| CN2888385Y (en) * | 2006-05-09 | 2007-04-11 | 中冶南方工程技术有限公司 | Slag scraper for oxygen gun |
| CN201620174U (en) * | 2010-01-14 | 2010-11-03 | 安徽工业大学 | Y-shaped oxygen lance slag separator |
| CN202081125U (en) * | 2011-05-13 | 2011-12-21 | 沈树光 | Slag scraping device of converter oxygen lance |
| CN203923258U (en) * | 2014-05-30 | 2014-11-05 | 泰州明锋资源再生科技有限公司 | Slag scraper of converter oxygen lance |
| CN204039432U (en) * | 2014-08-29 | 2014-12-24 | 宣化钢铁集团有限责任公司 | A kind of Dreg Scraping Device of Oxygen Lance being convenient to change |
| CN107828934A (en) * | 2017-09-28 | 2018-03-23 | 中冶南方工程技术有限公司 | A kind of Dreg Scraping Device of Oxygen Lance |
| CN209338601U (en) * | 2018-12-24 | 2019-09-03 | 中冶南方工程技术有限公司 | A kind of compact slag scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109371196A (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109371196B (en) | Compact slag scraper | |
| CN213203817U (en) | Movable door type hoisting equipment for box girder installation | |
| CN211812919U (en) | Take pre-installation structure's of car well unit and elevator equipment | |
| CN209338601U (en) | A kind of compact slag scraper | |
| CN208895386U (en) | A kind of laser cutting machine and its crossbeam | |
| CN114229736A (en) | Rail mounted lift platform is used in curtain engineering construction | |
| CN115818455A (en) | Climbing device for tower crane and tower crane | |
| CN212671145U (en) | Small-size slide rail formula portable hanging flower basket | |
| CN209799408U (en) | rail-mounted vertical transportation mechanism for unit plate | |
| JP4049310B2 (en) | Hot repair method for coke oven carbonization chamber wall | |
| CN216239919U (en) | Waterproof hard protection auxiliary mounting structure | |
| CN217206524U (en) | Single prop sliding device | |
| CN220454299U (en) | Novel flue sideslip platform truck and hydraulic cylinder formula activity petticoat pipe promote device | |
| CN219752350U (en) | Argon blowing station detection hole moving heat-resistant door | |
| CN219243759U (en) | Combined guardrail | |
| CN216304412U (en) | Shallow formula bridge telescoping device that buries of grider | |
| CN216613870U (en) | Rail mounted lift platform is used in curtain engineering construction | |
| CN215407307U (en) | Stereotyped elevator shaft operation platform | |
| CN2219300Y (en) | Coke guiding device | |
| CN211170742U (en) | Slag scraping device for converter oxygen lance | |
| CN218345010U (en) | Special-shaped shipbuilding bridge crane main beam | |
| CN217126748U (en) | Tower crane davit mechanism | |
| CN217516545U (en) | Maintenance cage for double-beam bridge crane | |
| CN218644304U (en) | Detachable top beam hydraulic support for coal mine | |
| CN215925687U (en) | Steel case roof beam butt joint levelling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |